Chip 2001 August - Disc 2/chip_20018102_hu.iso/linux/X-4.1.0/doc/xielib.txt

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XIElib
Specification


Gary Rogers
AGE Logic, Inc.

This document contains reference pages for each XIElib function.
Revision History

Gary Rogers, AGE Logic, Inc., Public Review Draft, April, 1994

Syd Logan, NetManage, Inc., Minor technical edits, correction of errors, October, 1996



Copyright ⌐ 1994 AGE Logic, Inc.


Permission to use, copy, modify, distribute, and sell this documentation for any purpose is hereby granted
without fee, provided that the above copyright notices and this permission notice appear in all copies.
AGE Logic makes no representations about the suitability for any purpose of the information in this
document. This documentation is only a draft standard of the X consortium and is therefore subject to
change.



Acknowledgments

XIElib was provided by the X Consortium, with cooperation from AGE Logic, Inc. of San Diego, CA.
It is a C subroutine library that provides a low level C binding of all features that are defined by
Version 5.0 of the XIE Protocol.

Various parts of the text were borrowed from the Version 5.0 XIE Protocol Reference Manual, edited
by Bob Shelley of AGE Logic, Inc.. Bob provided suggestions and comments that were invaluable in
preparing this document. Dean Verheiden and Syd Logan, both of AGE Logic, Inc., graciously
volunteered to review the original manuscript.

The author would like to thank Ralph Mor of the X Consortium for his careful review of this
document. Ralph designed the XIElib and wrote its sample implementation, and his technical advice
was indispensable. Adrian Nye, Editor for O'Reilly & Associates, Inc., provided substantive assistance
in the preparation of this document, for which the author is very thankful.



Table of Contents
Introduction    1
Startup Functions
XieInitialize   3
XieQueryTechniques      5
XieCreateColorList      8
XieDestroyColorList     9
XiePurgeColorList       10
XieQueryColorList       11
LUT Functions
XieCreateLUT    12
XieDestroyLUT   13
Photomap Functions
XieCreatePhotomap       14
XieDestroyPhotomap      15
XieQueryPhotomap        16
ROI Functions
XieCreateROI    18
XieDestroyROI   19
Photoflo Functions
XieCreatePhotospace     20
XieDestroyPhotospace    21
XieExecuteImmediate     22
XieAllocatePhotofloGraph        24
XieCreatePhotoflo       25
XieDestroyPhotoflo      27
XieExecutePhotoflo      28
XieModifyPhotoflo       29
XieRedefinePhotoflo     31
XieQueryPhotoflo        32
Client Data Functions
XiePutClientData        34
XieGetClientData        36
Abort and Await Functions
XieAbort        38
XieAwait        39
Photoflo Element Functions
XieFloImportClientLUT   40
XieFloImportClientPhoto 43
XieFloImportClientROI   46
XieFloImportDrawable    47
XieFloImportDrawablePlane       49
XieFloImportLUT 51
XieFloImportPhotomap    52
XieFloImportROI 54
XieFloArithmetic        55
XieFloBandCombine       58
XieFloBandExtract       60
XieFloBandSelect        62
XieFloBlend     63
XieFloCompare   66
XieFloConstrain 69
XieFloConvertFromIndex  71
XieFloConvertFromRGB    73
XieFloConvertToIndex    75
XieFloConvertToRGB      78
XieFloConvolve  80
XieFloDither    83
XieFloGeometry  85
XieFloLogical   88
XieFloMatchHistogram    91
XieFloMath      93
XieFloPasteUp   95
XieFloPoint     97
XieFloUnconstrain       99
XieFloExportClientHistogram     100
XieFloExportClientLUT   102
XieFloExportClientPhoto 104
XieFloExportClientROI   106
XieFloExportDrawable    108
XieFloExportDrawablePlane       110
XieFloExportLUT 112
XieFloExportPhotomap    114
XieFloExportROI 116
Technique Functions
XieTecColorAllocAll     117
XieTecColorAllocMatch   118
XieTecColorAllocRequantize      120
XieTecRGBToCIELab       121
XieTecRGBToCIEXYZ       123
XieTecRGBToYCbCr        125
XieTecRGBToYCC  127
XieTecCIELabToRGB       129
XieTecCIEXYZToRGB       132
XieTecYCbCrToRGB        134
XieTecYCCToRGB  136
XieTecClipScale 138
XieTecConvolveConstant  140
XieTecDecodeUncompressedSingle  141
XieTecDecodeUncompressedTriple  143
XieTecDecodeG31D        146
XieTecDecodeG32D        148
XieTecDecodeG42D        150
XieTecDecodeTIFF2       152
XieTecDecodeTIFFPackBits        154
XieTecDecodeJPEGBaseline        156
XieTecDecodeJPEGLossless        158
XieTecDitherOrdered     160
XieTecEncodeUncompressedSingle  161
XieTecEncodeUncompressedTriple  163
XieTecEncodeG31D        166
XieTecEncodeG32D        168
XieTecEncodeG42D        170
XieTecEncodeServerChoice        172
XieTecEncodeJPEGBaseline        174
XieTecEncodeJPEGLossless        177
XieTecEncodeTIFF2       179
XieTecEncodeTIFFPackBits        181
XieTecGeomAntialiasByArea       183
XieTecGeomAntialiasByLowpass    185
XieTecGeomGaussian      187
XieTecGeomNearestNeighbor       189
XieTecHistogramGaussian 191
XieTecHistogramHyperbolic       192
XieTecWhiteAdjustCIELabShift    194
Free Functions
XieFreeTechniques       195
XieFreePhotofloGraph    196
XieFreeEncodeJPEGBaseline       197
XieFreeEncodeJPEGLossless       198
XieFreePasteUpTiles     199
XIElib Events
ColorAlloc Event        Events-1
DecodeNotify Event      Events-2
ExportAvailable Event   Events-3
ImportObscured Event    Events-4
PhotofloDone Event      Events-5
XIElib Errors
Resource Errors Errors-1
Photoflo Errors Errors-2




 XIElib - Function Group        Introduction
The following pages describe the format of the reference pages for each XIElib function. Every effort
has been made to maintain consistency with the format used in Xlib Reference Manual for Version 11
(A. Nye, ed., O'Reilly & Associates, Inc., 1992). The reader is also referred to X Image Extension
Protocol Reference Manual, Version 5.0 (R. Shelley, ed., 1994) for a complete definition of the XIE
protocol.
Name
XieFunctionName - brief description of the function
Syntax
The Syntax section presents the calling syntax for the routine, including the declarations of the
arguments and the return type. For example:

returntype XieFunctionName (arg1, arg2_ret)
type1 arg1;
type2 *arg2_ret;
Arguments
The Arguments section describes each of the arguments used by the function. There are two sorts of
arguments: arguments to specify data to the function and arguments that return data from the
function. An example of each type follows:

arg1    Specifies information for XieFunctionName. The description for
this type of argument always starts with the word "Specifies."
arg2_ret        Returns information from XieFunctionName. The description for
this type of argument always starts with the word "Returns."
Returns
This section is present when XieFunctionName returns a value and describes what is returned.
Description
The Description section describes what the function does, what it returns, and what events or side
effects it causes. It also may contain pertinent definitions, algorithms, and tables. A description of
each XIE event structure is presented in the section XIElib Events.
Output Attributes
This section, which presents a table of element output attributes, is present if
XieFloFunctionName specifies an element that produces output data.

Class   Data class of output data
 - single band (achromatic or index)
 - triple band (trichromatic)
Type    Data type
 - constrained (quantization levels is Levels)
 - unconstrained (quantization levels is unknown)
Width   Width of output (in pixels per band)
Height  Height of output (in pixels per band)
Levels  Depends on type
 - constrained: number of quantization levels
 - unconstrained: unknown
Structures
The Structures section contains the C definitions of the XIE-specific data types used by
XieFunctionName as arguments or return values. It also contains definitions of important
constants used by the function.
Errors
The Errors section is present when an action of XieFunctionName could generate an error. A
table of errors that can be generated and their causes is presented. The full list of errors is presented
in the section XIElib Errors.
See Also
This section lists other functions that contain information related to XieFunctionName.
 XIElib - Startup Functions     XieInitialize
Name
XieInitialize - initialize the XIE extension
Syntax
Status XieInitialize (display, extinfo_ret)
Display *display;
XieExtensionInfo **extinfo_ret;
Arguments
display Specifies a connection to an X server.
extinfo_ret     Returns the pointer to an XieExtensionInfo structure, which contains
information about the XIE server's capabilities.
Returns
Zero on failure, nonzero on success.
Description
XieInitialize initializes the interface to the XIE extension and returns information about the
XIE server's capabilities. XieInitialize should be called to establish version compatibility
between client and server prior to making any other XIE request.

If successful, XieInitialize allocates and fills the XieExtensionInfo structure as follows:

*       The server_major_rev and server_minor_rev members are set to specify the highest
version of the XIE protocol that the server supports. If the server version is higher than the
XIElib version, the server will return the lower version, if it supports it.
*       The service_class member is set to the service-class supported by the XIE server. Service-
class defines the recognized image-processing service sets supported by the X Image Extension
standard; the two service classes currently defined are Full, the entire XIE protocol, and DIS, the
Document Image Subset, a proper subset of Full XIE. The service_class member can be set
to one of the standard values:

xieValFull
xieValDIS

*       The alignment member is set to the pixel and scanline alignment for image data supported by
the server. Values for this member can be either xieValAlignable or xieValArbitrary.
xieValAlignable data units must fit evenly within a byte, or they must fill a byte, or fill a
multiple of bytes; xieValArbitrary data units may fall at any bit address.
*       The uncnst_mantissa member is set to the number of bits in the servers floating-point
format (including the sign bit). If the server uses fixed point, uncnst_mantissa is set to zero.
*       The uncnst_min_exp member is set to the smallest (most negative) value n such that 2n is
representable in the servers unconstrained data format.
*       The uncnst_max_exp member is set to the largest value n such that 2n - 1 is representable in
the servers unconstrained data format.
*       The n_cnst_levels member is the number of items in the list cnst_levels.
*       The items in the list cnst_levels are set to the levels that are recommended for constrained
data by the server. A value of zero means 232 levels.
*       The first_event member is set to the value from which subsequent XIE events values are
based.
*       The first_error member is set to the value from which subsequent XIE error values are
based.

The memory allocated to extinfo_ret is freed when display is closed via XCloseDisplay;
the client should not free this memory.

If not successful, XieInitialize sets **extinfo_ret to NULL.
Structures
typedef struct {
        unsigned server_major_rev;
        unsigned server_minor_rev;
        XieServiceClass service_class;
        XieAlignment alignment;
        int uncnst_mantissa;
        int uncnst_min_exp;
        int uncnst_max_exp;
        int n_cnst_levels;
        unsigned long *cnst_levels;
        int major_opcode;
        int first_event;
        int first_error;
} XieExtensionInfo;

/* Definitions of Extension Name and Version Number */
#define xieMajorVersion 5
#define xieMinorVersion 0
#define xieEarliestMinorVersion 0
#define xieLatestMinorVersion   0

/* Definitions of ServiceClass */
#define xieValFull      1
#define xieValDIS       2

/* Definitions of Alignment */
#define xieValAlignable 1
#define xieValArbitrary 2
 XIElib - Startup Functions     XieQueryTechniques
Name
XieQueryTechniques - return information about the standard and private techniques that are
supported by the server
Syntax
Status XieQueryTechniques (display, technique_group, ntechniques_ret,
techniques_ret)
Display *display;
XieTechniqueGroup technique_group;
int *ntechniques_ret;
XieTechnique **techniques_ret;
Arguments
display Specifies a connection to an X server.
technique_group Specifies the group of techniques for which the server is to return
information.
ntechniques_ret Returns the number of items in the list of XieTechnique structures.
techniques_ret  Returns the pointer to the list of XieTechnique structures, which
contains the information about the selected group of techniques.
Returns
Zero on failure, nonzero on success.
Description
If successful, XieQueryTechniques allocates and fills each XieTechnique structure in the
list as follows:

*       The member needs_param is set to True if the technique requires additional parameters;
needs_param is set to False if the technique takes no parameters, or it has parameters that
are optional. If parameters are optional, they must be totally omitted, or they must all be supplied.
*       The member group is set to the group the technique belongs to.
*       The member number is set to the numeric identifier assigned to the technique.
*       The member speed is set to the server's assessment of the speed of this technique relative to
other techniques in the same group, where 0 is slowest and 255 is fastest.
*       The member name is set to the XIE compliant technique name string.

To free the memory allocated to techniques_ret, use XieFreeTechniques.

On failure, ntechniques_ret is set to zero and *techniques_ret is set to NULL.

The standard technique group names that can be queried using XieQueryTechniques are:

Technique group
Meaning
xieValDefault
Select all default techniques
xieValAll
Select all supported techniques
xieValColorAlloc
Select color allocation techniques
xieValConstrain
Select techniques for constraining data
xieValConvertFromRGB
Select colorspace conversion techniques (for conversion
from the RGB colorspace)
xieValConvertToRGB
Select colorspace conversion techniques (for conversion to
the RGB colorspace)
xieValConvolve
Select techniques for handling convolution edge conditions
xieValDecode
Select image decoding (decompression) techniques
xieValDither
Select dithering techniques
xieValEncode
Select image encoding (compression) techniques
xieValGamut
Select colorspace conversion gamut compression
techniques
xieValGeometry
Select geometric sampling techniques
xieValHistogram
Select match-histogram shapes
xieValWhiteAdjust
Select colorspace conversion white point adjustment
techniques

If a vendor defined an additional private technique group, it could be discovered by querying for all
groups.
Structures
typedef unsigned XieTechniqueGroup;
typedef struct {
        Bool needs_param;
        XieTechniqueGroup group;
        unsigned int number;
        unsigned int speed;
        char *name;
} XieTechnique;

/* Definitions for TechniqueGroups */
#define xieValDefault   0
#define xieValAll       1
#define xieValColorAlloc        2
#define xieValConstrain 4
#define xieValConvertFromRGB    6
#define xieValConvertToRGB      8
#define xieValConvolve  10
#define xieValDecode    12
#define xieValDither    14
#define xieValEncode    16
#define xieValGamut     18
#define xieValGeometry  20
#define xieValHistogram 22
#define xieValWhiteAdjust       24
Errors
BadAlloc        Insufficient resources
BadValue        Unknown technique_group
See Also
XieFreeTechniques
 XIElib - Color List Functions  XieCreateColorList
Name
XieCreateColorList - create a color list
Syntax
XieColorList XieCreateColorList (display)
Display *display;
Arguments
display Specifies a connection to an X server.
Returns
The color list identifier.
Description
XieCreateColorList creates a color list resource and returns its color list ID.

The color list created is an unpopulated server resource that can be used to store the list of colors
allocated by XieFloConvertToIndex. The Colormap allocations that are recorded in a color list
belong to the client that executed the photoflo that populated the resource (this is not necessarily the
same client that created the color list). A color list cannot be the target of more than one active
photoflo at a time. The contents of a color list may be queried using XieQueryColorList. All
allocated cells can be explicitly purged from a color list using XiePurgeColorList. A color list
can be destroyed using XieDestroyColorList.
Structures
typedef XID XieColorList;
Errors
BadAlloc        Insufficient resources
BadIdChoice     Invalid color list
See Also
XieDestroyColorList, XiePurgeColorList, XieQueryColorList, XieFloConvertToIndex
 XIElib - Color List Functions  XieDestroyColorList
Name
XieDestroyColorList - destroy a color list
Syntax
void XieDestroyColorList (display, color_list)
Display *display;
XieColorList color_list;
Arguments
display Specifies a connection to an X server.
color_list      Specifies the color list to be destroyed.
Description
XieDestroyColorList destroys the color list resource identified by color_list. Once
destroyed, color list ID is no longer valid.
Structures
typedef XID XieColorList;
Errors
xieErrNoColorlist       Invalid color_list
See Also
XieCreateColorList
 XIElib - Color List Functions  XiePurgeColorList
Name
XiePurgeColorList - purge all allocated cells from a color list
Syntax
void XiePurgeColorList (display, color_list)
Display *display;
XieColorList color_list;
Arguments
display Specifies a connection to an X server.
color_list      Specifies the color list to be purged.
Description
XiePurgeColorList frees the colors from the specified color list.
Structures
typedef XID XieColorList;
Errors
BadAccess       Attempt to purge colors when color list is being written by a photoflo
xieErrNoColorlist       Invalid color_list
See Also
XieCreateColorList, XieDestroyColorList, XieQueryColorList, XieFloConvertToIndex
 XIElib - Color List Functions  XieQueryColorList
Name
XieQueryColorList - obtain a list of allocated Colormap indices
Syntax
Status XieQueryColorList (display, color_list, colormap_ret,
ncolors_ret, colors_ret)
Display *display;
XieColorList color_list;
Colormap *colormap_ret;
unsigned *ncolors_ret;
unsigned long **colors_ret;
Arguments
display Specifies a connection to an X server.
color_list      Specifies the color list to query.
colormap_ret    Returns the Colormap from which the colors were allocated.
ncolors_ret     Returns the number of Colormap indices in the list.
colors_ret      Returns the list of allocated Colormap indices.
Returns
Zero on failure, nonzero on success.
Description
XieQueryColorList allocates and returns a list of colors allocated by a ConvertToIndex element.

When there are no colors in color list, a zero status is returned, the value zero is returned for the
colormap, and the list of colors is of length zero. The pointer to the list of allocated Colormap indices
is set to NULL.

To free the memory allocated to colors_ret, use XFree.
Structures
typedef XID XieColorList;
Errors
BadAlloc        Insufficient resources
xieErrNoColorlist       Invalid color list
See Also
XieCreateColorList, XieDestroyColorList, XieQueryColorList, XieFloConvertToIndex
 XIElib - LUT Functions XieCreateLUT
Name
XieCreateLUT - create a lookup table
Syntax
XieLut XieCreateLUT (display)
Display *display;
Arguments
display Specifies a connection to an X server.
Returns
The lookup table (LUT) identifier.
Description
XieCreateLUT creates a server resource that is used as a lookup table (LUT) by a Point element. A
lookup table consists of one or three single-dimension arrays, each long enough to contain an entry
for all possible pixels values in the image data to which the Point element will be applied.

The LUT is populated (or repopulated) with lookup table entries after the successful execution of a
photoflo containing an ExportLUT element that targets lut. LUT data can be imported into a photoflo
using an ImportLUT element.
Structures
typedef XID XieLut;
Errors
BadAlloc        Insufficient resources
BadIDChoice     Invalid LUT
See Also
XieDestroyLUT, XieFloImportLUT, XieFloExportLUT
 XIElib - LUT Functions XieDestroyLUT
Name
XieDestroyLUT - destroy a lookup table
Syntax
void XieDestroyLUT (display, lut)
Display *display;
XieLut lut;
Arguments
display Specifies a connection to an X server.
lut     Specifies the ID of the LUT to be destroyed.
Description
XieDestroyLUT destroys the lookup table (LUT) identified by lut. Once destroyed, LUT ID is no
longer valid.
Structures
typedef XID XieLut;
Errors
xieErrNoLut     The value for the lut argument does not name a defined LUT
See Also
XieDestroyLUT, XieFloImportLUT, XieFloExportLUT
 XIElib - Photomap Functions    XieCreatePhotomap
Name
XieCreatePhotomap - create a photomap
Syntax
XiePhotomap XieCreatePhotomap (display)
Display *display;
Arguments
display Specifies a connection to an X server.
Returns
The photomap identifier.
Description
XieCreatePhotomap creates a photomap, a server resource that stores image data. Photomap
data may be rendered for display or used as input to control or modify the rendition of another image.

Photomap attributes are defined when a photoflo containing an ExportPhotomap element populates
the photomap with data.
Structures
typedef XID XiePhotomap;
Errors
BadAlloc        Insufficient resources
BadIdChoice     Invalid photomap
See Also
XieDestroyPhotomap, XieQueryPhotomap, XieFloImportPhotomap, XieFloExportPhotomap
 XIElib - Photomap Functions    XieDestroyPhotomap
Name
XieDestroyPhotomap - destroy a photomap
Syntax
void XieDestroyPhotomap (display, photomap)
Display *display;
XiePhotomap photomap;
Arguments
display Specifies a connection to an X server.
photomap        Specifies the ID of the photomap to be destroyed.
Description
XieDestroyPhotomap destroys the photomap identified by photomap. Once destroyed, the
photomap ID is no longer valid. A photomap is the XIE resource used to store image data in the
server.
Structures
typedef XID XiePhotomap;
Errors
xieErrNoPhotomap        The value for the photomap argument does not name a defined
photomap
See Also
XieCreatePhotomap , XieQueryPhotomap, XieFloImportPhotomap, XieFloExportPhotomap
 XIElib - Photomap Functions    XieQueryPhotomap
Name
XieQueryPhotomap - return the queriable attributes of a photomap
Syntax
Status XieQueryPhotomap (display, photomap, populated_ret,
datatype_ret, class_ret, decode_technique_ret, width_ret,
height_ret, levels_ret)
Display *display;
XiePhotomap photomap;
Bool *populated_ret;
XieDataType *datatype_ret;
XieDataClass *class_ret;
XieDecodeTechnique *decode_technique_ret;
XieLTriplet width_ret;
XieLTriplet height_ret;
XieLTriplet levels_ret;
Arguments
display Specifies a connection to an X server.
photomap        Specifies the photomap to be queried.
populated_ret   Returns the status of the photomap.
datatype_ret    Returns the type of data in the photomap.
class_ret       Returns the class of data in the photomap.
decode_technique_ret    Returns the decode technique required to interpret the data.
width_ret       Returns the width, in pixels per band.
height_ret      Returns the height, in pixels per band.
levels_ret      Returns the number of quantization levels per band.
Returns
Zero on failure, nonzero on success.
Description
A photomap is a server resource that stores image data. XieQueryPhotomap sets
populated_ret to indicate whether or not photomap has been populated with attributes and
data. If populated_ret is False, all remaining fields contain zeros.

datatype_ret reports whether the photomap contains constrained or unconstrained data, and is
set to one of the following standard data type values:

xieValConstrained
xieValUnconstrained

class_ret is the class of image data (that is, single-band or triple-band) and is set to one of the
following standard data class values:

xieValSingleBand
xieValTripleBand

width_ret and height_ret are set to the dimensions of the image data in pixels (per band).
levels_ret is set to the potential dynamic range, or number of quantization levels (per band). If
datatype_ret is set to unconstrained, the returned values for levels are zeros. If class_ret is
xieValSingleBand, width_ret, height_ret, and levels_ret are only valid for element
0 in each of these vectors; elements 1 and 2 are unused and are returned as zeros.

decode_technique_ret is set to the decode technique that will be required to interpret or
decompress the data. Decode techniques define the techniques that can be used to interpret
uncompressed image data or decode compressed images. decode_technique_ret can be set to
one of the following standard decode technique values:

xieValDecodeUncompressedSingle
xieValDecodeUncompressedTriple
xieValDecodeG31D
xieValDecodeG32D
xieValDecodeG42D
xieValDecodeJPEGBaseline
xieValDecodeJPEGLossless
xieValDecodeTIFF2
xieValDecodeTIFFPackBits

If a vendor defined additional private decode techniques, decode_technique_ret can be set to
the values given to these techniques.
Structures
typedef unsigned XieDataClass;
typedef unsigned XieDataType;
typedef unsigned XieDecodeTechnique;
typedef unsigned long XieLTriplet[3];
typedef XID XiePhotomap;

/* Definitions of DataType */
#define xieValConstrained       1
#define xieValUnconstrained     2

/* Definitions of DataClass */
#define xieValSingleBand        1
#define xieValTripleBand        2

/* Definitions for DecodeTechniques */
#define xieValDecodeUncompressedSingle  2
#define xieValDecodeUncompressedTriple  3
#define xieValDecodeG31D        4
#define xieValDecodeG32D        6
#define xieValDecodeG42D        8
#define xieValDecodeJPEGBaseline        10
#define xieValDecodeJPEGLossless        12
#define xieValDecodeTIFF2       14
#define xieValDecodeTIFFPackBits        16
Errors
xieErrNoPhotomap        The value for the photomap argument does not name a defined
photomap.
xieErrNoFloAlloc        Insufficient resources (for exmple, memory)
 XIElib - ROI Functions XieCreateROI
Name
XieCreateROI - create a Rectangles-Of-Interest
Syntax
XieRoi XieCreateROI (display)
Display *display;
Arguments
display Specifies a connection to an X server.
Returns
The ROI (Rectangles-Of-Interest) identifier.
Description
XieCreateROI creates a server ROI (Rectangles-Of-Interest) resource, and returns its resource ID
to the client.
Structures
typedef XID XieRoi;
Errors
BadAlloc        Insufficient resources
BadIDChoice     Invalid ROI
See Also
XieDestroyROI, XieFloImportROI, XieFloExportROI
 XIElib - ROI Functions XieDestroyROI
Name
XieDestroyROI - destroy a Rectangles-Of-Interest
Syntax
void XieDestroyROI (display, roi)
Display *display;
XieRoi roi;
Arguments
display Specifies a connection to an X server.
roi     Specifies the ID of the ROI to be destroyed.
Description
XieDestroyROI destroys the Rectangles-Of-Interest (ROI) identified by roi. Once destroyed,
roi is no longer valid.
Structures
typedef XID XieRoi;
Errors
xieErrNoROI     The value for the roi argument does not name a defined ROI
See Also
XieCreateROI
 XIElib - Immediate Photoflo Functions  XieCreatePhotospace
Name
XieCreatePhotospace - create a photospace
Syntax
XiePhotospace XieCreatePhotospace (display)
Display *display;
Arguments
display Specifies a connection to an X server.
Returns
The photospace identifier.
Description
XieCreatePhotospace returns a resource-id for a new photospace that can be used to
accommodate immediate photoflos instantiated by a client. Any client that needs to instantiate
immediate photoflos must create at least one photospace.
Structures
typedef XID XiePhotospace;
Errors
BadAlloc        Insufficient resources
BadIDChoice     Invalid photospace
See Also
XieDestroyPhotospace, XieExecuteImmediate
 XIElib - Immediate Photoflo Functions  XieDestroyPhotospace
Name
XieDestroyPhotospace - destroy a photospace
Syntax
void XieDestroyPhotospace (display, photospace)
Display *display;
XiePhotospace photospace;
Arguments
display Specifies a connection to an X server.
photospace      Specifies the ID of the photospace to be destroyed.
Description
XieDestroyPhotospace destroys a photospace. Prior to destroying the photospace, all photoflos
that are currently active in the photospace will be aborted, exported data pending client retrieval will
be freed, and the photoflos will be destroyed.
Structures
typedef XID XiePhotospace;
Errors
xieErrNoPhotospace      The value for the photospace argument does not name a defined
photospace
See Also
XieCreatePhotospace
 XIElib - Immediate Photoflo Functions  XieExecuteImmediate
Name
XieExecuteImmediate - define and begin execution of an immediate photoflo
Syntax
void XieExecuteImmediate (display, photospace, flo_id, notify,
elem_list, elem_count)
Display *display;
XiePhotospace photospace;
unsigned long flo_id;
Bool notify;
XiePhotoElement *elem_list;
int elem_count;
Arguments
display Specifies a connection to an X server.
photospace      Specifies the ID of the photospace to be executed.
flo_id  Specifies a particular instance of the photoflo to be executed.
notify  Specifies whether a PhotofloDone event must be sent upon
completion.
elem_list       Specifies the import, process, and export elements to be executed.
elem_count      Specifies the number of items in elem_list.
Description
XieExecuteImmediate begins the asynchronous execution of an immediate photoflo. The server
does not save a copy of an immediate photoflo after the photoflo has completed execution and all data
exported for the client have been retrieved. An immediate photoflo may therefore not be modified or
totally redefined prior to subsequent executions. It is legal to have multiple unique instances of
immediate photoflos (and stored photoflos) active concurrently.

The photospace/flo_id argument pair specifies the instance by which this photoflo will be
identified in other requests, events, or errors. notify specifies whether a PhotofloDone event
must be sent upon completion. The PhotofloDone event notifies the client that a photoflo has left
the active state: it is no longer executing. elem_list defines the import, process, and export
elements to be executed.

If any clients have blocked themselves during the execution of the photoflo (see XieAwait), they
will become unblocked when the photoflo's state changes from active to nonexistent.

Care should be taken that the argument pair elem_list/elem_count matches a returned value
(an array of XiePhotoElement structures) and argument count from a call to
XieAllocatePhotofloGraph.
Structures
typedef XID XiePhotospace;

typedef struct {
        int elemType;
        /* union of ALL element types */
        union {
                ...
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloElement      Invalid element type(s) in elem_list
xieErrNoFloID   Invalid photospace/flo_id argument pair has been specified
xieErrNoFlo     An error has been detected while defining, executing, or accessing a
photoflo (See Photoflo Errors).
See Also
XieAwait, XieAllocatePhotofloGraph
 XIElib - Photoflo Functions    XieAllocatePhotofloGraph
Name
XieAllocatePhotofloGraph - allocate an array of XiePhotoElement structures
Syntax
XiePhotoElement *XieAllocatePhotofloGraph (count);
unsigned int count;
Arguments
count   Specifies the number of XiePhotoElement structures to allocate.
Returns
The array of XiePhotoElement structures.
Description
XieAllocatePhotofloGraph allocates and returns a pointer to an array of
XiePhotoElement structures; each field of each structure in the array is set to zero (0).

To free the memory allocated to the list of XiePhotoElement structures, use
XieFreePhotofloGraph .

If XieAllocatePhotofloGraph is unable to create an XiePhotoElement array , it returns
NULL.
Structures
typedef struct {
        int elemType;
        /* union of ALL element types */
        union {
                ...
                ...
        } data;
} XiePhotoElement;
See Also
XieFreePhotofloGraph, XieCreatePhotoflo, XieModifyPhotoflo, XieRedefinePhotoflo,
XieExecutePhotoflo, XieExecuteImmediate
 XIElib - Stored Photoflo Functions     XieCreatePhotoflo
Name
XieCreatePhotoflo - create a stored photoflo
Syntax
XiePhotoflo XieCreatePhotoflo (display, elem_list, elem_count)
Display *display;
XiePhotoElement *elem_list;
int elem_count;
Arguments
display Specifies a connection to an X server.
elem_list       Specifies the defining array of XiePhotoElement structures.
elem_count      Specifies the number of XiePhotoElement structures in the array.
Returns
The photoflo identifier.
Description
XieCreatePhotoflo creates a stored photoflo resource, defines its complete contents using the
contents of elem_list, sets it in the inactive state, and returns its resource-id. Stored photoflos
persist beyond execution and may be modified or totally redefined prior to subsequent executions.

The returned photoflo identifier is a new resource-id that, along with the execution domain used for
the photoflo, identifies this photoflo in other requests, events, or errors. elem_list defines the
import, process, and export elements to be stored for execution. Although resources and parameters
are specified at creation, no action is taken to validate them at that time. XieCreatePhotoflo
will only store the photoflo's definition: parameter validation is delayed until an execute request is
received.
Structures
typedef XID XiePhotoflo;

typedef struct {
        int elemType;
        /* union of ALL element types */
        union {
                ...
                ...
        } data;
} XiePhotoElement;
Errors
BadAlloc        Insufficient resources
BadIdChoice     Invalid photoflo
xieErrNoFloAlloc        Insufficient resources (for example, memory) for elem_list
xieErrNoFloElement      Invalid element type(s) in elem_list
xieErrNoFlo     An error has been detected while defining, executing, or accessing a
photoflo (see Photoflo Errors).
See Also
XieAllocatePhotofloGraph,  XieFreePhotofloGraph, XieModifyPhotoflo, XieRedefinePhotoflo,
XieExecutePhotoflo, XieQueryPhotoflo, XieDestroyPhotoflo
 XIElib - Stored Photoflo Functions     XieDestroyPhotoflo
Name
XieDestroyPhotoflo - destroy a stored photoflo
Syntax
void XieDestroyPhotoflo (display, photoflo)
Display *display;
XiePhotoflo photoflo;
Arguments
display Specifies a connection to an X server.
photoflo        Specifies the photoflo to be destroyed.
Description
XieDestroyPhotoflo destroys a stored photoflo. If photoflo is active, that is, executing, it is
aborted and all exported data that are pending client retrieval are freed prior to destroying
photoflo.
Structures
typedef XID XiePhotoflo;
Errors
xieErrNoPhotoflo        The value for the photoflo argument does not name a defined
photoflo
See Also
XieCreatePhotoflo
 XIElib - Stored Photoflo Functions     XieExecutePhotoflo
Name
XieExecutePhotoflo - execute a stored photoflo
Syntax
void XieExecutePhotoflo (display, photoflo, notify)
Display *display;
XiePhotoflo photoflo;
Bool notify;
Arguments
display Specifies a connection to an X server.
photoflo        Specifies the photoflo to be executed.
notify  Specifies that a PhotofloDone event must be sent upon completion.
Description
XieExecutePhotoflo changes a stored photoflo to the active state. Execution is asynchronous.
The photoflo returns to the inactive state when execution completes and all data exported for the
client have been retrieved. It is legal to have multiple stored photoflos (and immediate photoflos)
active concurrently.

notify specifies that a PhotofloDone event must be sent upon completion. A PhotofloDone
event notifies the client that a photoflo has left the active state (it is no longer executing).

Stored photoflos persist beyond execution and may be modified or totally redefined prior to
subsequent executions.
Structures
typedef XID XiePhotoflo;
Errors
xieErrNoPhotoflo        The value for the photoflo argument does not name a defined
photoflo
xieErrNoFloAccess       Attempt to execute photoflo when it is already active
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFlo     An error has been detected while defining, executing, or accessing a
photoflo (see Photoflo Errors).
See Also
XieCreatePhotoflo, XieModifyPhotoflo, XieRedefinePhotoflo, XieQueryPhotoflo,
XieDestroyPhotoflo, XieAbort, XieAwait, XieGetClientData, XiePutClientData
 XIElib - Stored Photoflo Functions     XieModifyPhotoflo
Name
XieModifyPhotoflo - modify a stored photoflo
Syntax
void XieModifyPhotoflo (display, photoflo, start, elem_list,
elem_count)
Display *display;
XiePhotoflo photoflo;
int start;
XiePhotoElement *elem_list;
int elem_count;
Arguments
display Specifies a connection to an X server.
photoflo        Specifies the photoflo to be modified.
start   Specifies the index where element replacement is to begin.
elem_list       Specifies an array of elements that will replace existing elements.
elem_count      Specifies the number of items in elem_list.
Description
XieModifyPhotoflo allows element parameters of a stored photoflo to be modified. Stored
photoflos persist beyond execution and may be modified prior to subsequent executions.

start is the position or index of an element within an array of elements used to specify a photoflo;
the first element in the array has a start value of one (1).

XieModifyPhotoflo only allows parameter modification. No topological changes are allowed:
elements cannot be deleted, inserted, or appended.
Structures
typedef XID XiePhotoflo;

typedef struct {
        int elemType;
        /* union of ALL element types */
        union {
                ...
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoPhotoflo        The value for the photoflo argument does not name a defined
photoflo
xieErrNoFloAccess       Attempt to change photoflo when it is already active
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloElement      Invalid element type(s) in elem_list or
attempt to append additional element(s) to photoflo
xieErrNoFloSource       An invalid start has been specified or
attempt to change input connections of type XiePhototag in
elem_list
xieErrNoFlo     An error has been detected while defining, executing, or accessing a
photoflo (see Photoflo Errors).
See Also
XieAllocatePhotofloGraph, XieFreePhotofloGraph, XieCreatePhotoflo, XieRedefinePhotoflo,
XieExecutePhotoflo, XieQueryPhotoflo, XieDestroyPhotoflo
 XIElib - Stored Photoflo Functions     XieRedefinePhotoflo
Name
XieRedefinePhotoflo - redefine a stored photoflo
Syntax
void XieRedefinePhotoflo (display, photoflo, elem_list, elem_count)
Display *display;
XiePhotoflo photoflo;
XiePhotoElement *elem_list;
int elem_count;
Arguments
display Specifies a connection to an X server.
photoflo        Specifies the photoflo to be redefined.
elem_list       Specifies an array of elements that will replace all existing elements.
elem_count      Specifies the number of items in elem_list.
Description
XieRedefinePhotoflo allows all elements of a stored photoflo to be removed and replaced with
a new list. Stored photoflos persist beyond execution and may be totally redefined prior to subsequent
executions.

There are no restrictions on changing element types or the array's size.
Structures
typedef XID XiePhotoflo;

typedef struct {
        int elemType;
        /* union of ALL element types */
        union {
                ...
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoPhotoflo        The value for the photoflo argument does not name a defined
photoflo
xieErrNoFloAccess       Attempt to change photoflo when it is already active
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloElement      Invalid element type(s) in elem_list
xieErrNoFlo     An error has been detected while defining, executing, or accessing a
photoflo (see Photoflo Errors).
See Also
XieAllocatePhotofloGraph, XieFreePhotofloGraph, XieCreatePhotoflo, XieModifyPhotoflo,
XieExecutePhotoflo, XieQueryPhotoflo, XieDestroyPhotoflo
 XIElib - Photoflo Functions    XieQueryPhotoflo
Name
XieQueryPhotoflo - return the current status of a photoflo
Syntax
XieQueryPhotoflo(display, name_space, flo_id, state_ret,
data_expected_ret, nexpected_ret, data_available_ret,
navailable_ret)
Display *display;
unsigned long name_space;
unsigned long flo_id;
XiePhotofloState *state_ret;
XiePhototag **data_expected_ret;
unsigned int *nexpected_ret;
XiePhototag **data_available_ret;
unsigned int *navailable_ret;
Arguments
display Specifies a connection to an X server.
name_space      Specifies the execution domain used for the photoflo to query.
flo_id  Specifies a particular instance of the photoflo to query.
state_ret       Returns the state of the photoflo.
data_expected_ret       Returns a list of ImportClient elements.
nexpected_ret   Returns the length of data_expected_ret.
data_available_ret      Returns a list of ExportClient elements.
navailable_ret  Returns the length of data_available_ret.
Returns
Zero on failure, nonzero on success.
Description
XieQueryPhotoflo will return the current status of a photoflo.

The name_space/flo_id argument pair specifies the instance that identifies the photoflo that is
being queried. state_ret indicates the state of the photoflo, and if XieQueryPhotoflo is
successful, will return one of the following standard photoflo state values:

xieValInactive
xieValActive
xieValNonexistent

data_expected_ret is a list of ImportClient elements that are expecting data via
XiePutClientData. data_available_ret is a list of ExportClient elements from which
data are available (via XieGetClientData). Either or both of these lists may be of length zero,
indicated by the returned values of nexpected_ret and navailable_ret.

XieQueryPhotoflo allocates memory for the list of ImportClient elements and the list of
ExportClient elements. To free the memory allocated to data_expected_ret and
data_available_ret, use XFree.

Specifying an unknown or invalid instance will return a state_ret of nonexistent and zero length
data_expected_ret and data_available_ret lists.
Structures
typedef unsigned XiePhotofloState;

/* Definitions of PhotofloState */
#define xieValInactive  1
#define xieValActive    2
#define xieValNonexistent       3
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
See Also
XieCreatePhotoflo, XieModifyPhotoflo, XieRedefinePhotoflo, XieExecutePhotoflo,
XieDestroyPhotoflo, XieGetClientData, XiePutClientData
 XIElib - Client Data Functions XiePutClientData
Name
XiePutClientData - send a stream of data to an active photoflo
Syntax
void XiePutClientData (display, name_space, flo_id, element, final,
band_number, data, nbytes)
Display *display;
unsigned long name_space;
unsigned long flo_id;
XiePhototag element;
Bool final;
unsigned band_number;
unsigned char *data;
unsigned nbytes;
Arguments
display Specifies a connection to an X server.
name_space      Specifies the execution domain used for the photoflo to receive the
data.
flo_id  Specifies a particular instance of the photoflo to receive the data.
element Specifies the element to receive the data.
final   Specifies if the data is the last segment of data to be sent. If True, then
data represents the last data to be sent by the client. False indicates
that more data will be sent (during a subsequent call to
XiePutClientData).
band_number     Specifies which band of data is being sent.
data    Specifies a counted list of bytes that comprises the data stream.
nbytes  Specifies the count of bytes that comprises the data stream.
Description
XiePutClientData sends a stream of data to an active photoflo. Since the complete data object
may be larger than can fit in a single protocol request, XIE allows the stream to be segmented; the
last segment is signaled with a final flag.

The organization and contents of the data stream must match the parameters given to the
ImportClient element or the results are undefined. An arbitrary amount of image data can be sent per
request, whereas for nonimage data one or more complete aggregates must be sent per request (for
example, one or more LUT array entries). If too many data are sent (for example, too many
rectangles, or too many scanlines), the unwanted data are discarded.  It is an error, however, to send
too few data prior to signaling final.

For stored photoflos, name_space is always ServerIDSpace (the value zero) and flo_id is the
photoflo's resource-id. For immediate photoflos name_space is a photospace resource-id and
flo_id is 32-bit value that uniquely identifies the instance of the photoflo within name_space.
Structures
typedef unsigned XiePhototag;
Errors
xieErrNoFloAccess       Executable photospace/flo_id argument pair not active
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloElement      Invalid element type specified by element
xieErrNoFloID   Invalid photospace/flo_id argument pair has been specified
xieErrNoFloValue        Invalid band_number or
for nonimage data, data contains a partial aggregate
See Also
XieGetClientData, XieQueryPhotoflo, XieFloImportClientPhoto, XieFloImportClientROI,
XieFloImportClientLUT
 XIElib - Client Data Functions XieGetClientData
Name
XieGetClientData - retrieve data from an ExportClient element within an active photoflo
Syntax
Status XieGetClientData (display, name_space, flo_id, element,
max_bytes, terminate, band_number, new_state_ret,
data_ret, nbytes_ret)
Display *display;
unsigned long name_space;
unsigned long flo_id;
XiePhototag element;
unsigned max_bytes;
Bool terminate;
unsigned band_number;
XieExportState *new_state_ret;
unsigned char **data_ret;
unsigned *nbytes_ret;
Arguments
display Specifies a connection to an X server.
name_space      Specifies the execution domain used for the photoflo from which to
retrieve data.
flo_id  Specifies a particular instance of the photoflo from which to retrieve
data.
element Specifies the element from which to retrieve the data.
max_bytes       Specifies the maximum number of bytes that can be sent to the client.
terminate       Specifies whether more data are wanted after this request.
band_number     Specifies which band of data is being retrieved.
new_state_ret   Returns the status of the ExportClient element after this request.
data_ret        Returns a counted list of bytes that comprises the data stream.
nbytes_ret      Returns the count of bytes that comprises the data stream.
Returns
Zero on failure, nonzero on success.
Description
XieGetClientData returns data in a contiguous read-once byte stream, which can be requested
in segments that are limited in size by the amount the client desires or the amount of data available
from the server. The format of the data depends on the parameters given to the ExportClient element
from which the data are requested.

new_state_ret returns the state of the ExportClient element after this request and can be set to
one of the following standard export state values:

xieValExportDone
xieValExportMore
xieValExportEmpty
xieValExportError

If the request is sent to an ExportClient element that either: does not have any data, was terminated
by a previous XieGetClientData call, or has already returned all its data (ExportDone sent), the
request will return a zero length data_ret stream.

Image data are always retrieved from the server as a byte stream, whereas nonimage data are always
returned by the server as one or more complete aggregates. max_bytes is effectively rounded down
by the server to the match the nearest aggregate size.

For stored photoflos, name_space is always ServerIDSpace (the value zero) and flo_id is the
photoflo's resource-id. For immediate photoflos name_space is a photospace resource-id and
flo_id  is a 32-bit value that uniquely identifies the instance of the photoflo within name_space.

To free the memory allocated to data_ret, use XFree.
Structures
typedef unsigned XieExportState;
typedef unsigned XiePhototag;

/* Definitions of ExportState */
#define xieValExportDone        1
#define xieValExportMore        2
#define xieValExportEmpty       3
#define xieValExportError       4
Errors
xieErrNoFloAccess       Executable photospace/flo_id argument pair not active
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloElement      Invalid element type specified by element
xieErrNoFloID   Invalid photospace/flo_id argument pair has been specified
xieErrNoFloValue        Invalid band_number
See Also
XiePutClientData, XieQueryPhotoflo, XieExecutePhotoflo, XieFloExportClientHistogram,
XieFloExportClientLUT, XieFloExportClientPhoto, XieFloExportClientROI
 XIElib - Abort and Await Functions     XieAbort
Name
XieAbort - prematurely terminate execution of a photoflo
Syntax
void XieAbort (display, name_space, flo_id);
Display *display;
unsigned long name_space;
unsigned long flo_id;
Arguments
display Specifies a connection to an X server.
name_space      Specifies the execution domain used for the photoflo to abort.
flo_id  Specifies a particular instance of the photoflo to abort.
Description
XieAbort will prematurely terminate execution of the photoflo specified by name_space and
flo_id. Any output from the photoflo that is pending client retrieval is freed. Stored photoflos are
returned to the inactive state; immediate photoflos are destroyed.

If the photoflo specified by name_space and flo_id is either invalid or  not active, no action is
taken; it is not an error, and nothing is destroyed.

For stored photoflos, name_space is always ServerIDSpace (the value zero) and flo_id is the
photoflo's resource-id. For immediate photoflos name_space is a photospace resource-id and
flo_id  is 32-bit value that uniquely identifies the instance of the photoflo within name_space.
See Also
XieExecutePhotoflo, XieExecuteImmediate
 XIElib - Abort and Await Functions     XieAwait
Name
XieAwait - block all further requests for this client connection from being honored by the server while
the photoflo is active
Syntax
void XieAwait (display, name_space, flo_id);
Display *display;
unsigned long name_space;
unsigned long flo_id;
Arguments
display Specifies a connection to an X server.
name_space      Specifies the execution domain used for the photoflo to block requests.
flo_id  Specifies a particular instance of the photoflo to block requests.
Description
XieAwait blocks all further requests for this client connection from being honored by the server
while the photoflo, specified by name_space and flo_id, is active. When the photoflo transitions
from the active state, blocked requests are allowed to be processed in the order received.

If the photoflo specified by name_space and flo_id is either invalid or not active, no action is
taken; it is not an error, and the client is not blocked.

For stored photoflos, name_space is always ServerIDSpace (the value zero) and flo_id is the
photoflo's resource-id. For immediate photoflos name_space is a photospace resource-id and
flo_id  is 32-bit value that uniquely identifies the instance of the photoflo within name_space.
Warning
Calling XieAwait before sending all import data or before retrieving all export data will block the
client from sending or retrieving the remaining data. This also will prevent completion of the
photoflo and prevent any and all protocol requests from this client from being honored. This deadlock
can be broken only by another client completing or aborting the photoflo (to release the Await), or by
breaking the client connection.
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
See Also
XieExecutePhotoFlo, XieExecuteImmediate
 XIElib - Photoflo Element Functions    XieFloImportClientLUT
Name
XieFloImportClientLUT - specify an ImportClientLUT element and set its parameters
Syntax
void XieFloImportClientLUT (element, data_class, band_order, length,
levels)
XiePhotoElement *element;
XieDataClass data_class;
XieOrientation band_order;
XieLTriplet length;
XieLevels levels;
Arguments
element Specifies the XiePhotoElement structure to use.
data_class      Specifies the number of lookup arrays to expect.
band_order      Specifies the order of triple band arrays.
length  Specifies the number of entries per array.
levels  Specifies the number of quantization levels represented per array.
Description
An ImportClientLUT element accepts lookup table data from the protocol stream. The transport of
data through the protocol stream is accomplished using XiePutClientData. This data is accepted
by the Point, ExportLUT, and ExportClientLUT elements.

data_class, which specifies the number of lookup arrays to expect, can be set to one of the
following standard data class values:

xieValSingleBand
xieValTripleBand

The length of each array should match the number of source image levels that will be remapped
through the array. When a triple band image is to be remapped through a single band array, the
length of the array should match the product of the source image levels of all three bands; in this
case, band_order specifies the order in which pixels from a triple band image should be combined
to form indices for a single band array. band_order can be set to one of the following standard
orientation values:

xieValLSFirst
xieValMSFirst

The least significant band of trichromatic data is the first band mentioned in the common name of the
colorspace: for example, red is the least significant band of RGB data. When one LUT array is used
with triple band data, the algorithm for computing combined array indices, based on band_order,
is:

LUT band order
LUT indexing algorithm for combining pixel values
LSFirst
index = value[0] + value[1] x levels[0] + value[2] x levels[0] x levels[1]
MSFirst
index = value[2] + value[1] x levels[2] + value[0] x levels[2] x levels[1]

When three LUT arrays are used, band_order specifies whether this band corresponds with the
least significant or most significant LUT array. Each array is transported as a separate data stream.
For example, if the colorspace of the image data is RGB:

band
LSFirst
MSFirst
0
Red array
Blue array
1
Green array
Green array
2
Blue array
Red array
Structures
XieFloImportClientLUT sets the XiePhotoElement structure field elemType to
xieElemImportClientLUT, which identifies the element as an ImportClientLUT, and sets the
fields of the member structure ImportClientLUT using the arguments in the argument list.

typedef unsigned XieDataClass;
typedef unsigned XieOrientation;
typedef unsigned long XieLTriplet[3];
typedef unsigned long XieLevels[3];

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XieDataClass data_class;
                        XieOrientation band_order;
                        XieLTriplet length;
                        XieLevels levels;
                } ImportClientLUT;
                ...
        } data;
} XiePhotoElement;

/* Definitions of DataClass */
#define xieValSingleBand        1
#define xieValTripleBand        2

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        levels is incompatible with the server's depth-handling capabilities
xieErrNoFloValue        Invalid data_class or band_order
See Also
XiePutClientData, XieQueryPhotoflo, XieFloExportLUT, XieFloExportClientLUT, XieFloPoint,
XieFloImportLUT
 XIElib - Photoflo Element Functions    XieFloImportClientPhoto
Name
XieFloImportClientPhoto - specify an ImportClientPhoto element and set its parameters
Syntax
void XieFloImportClientPhoto (element, data_class, width, height,
levels, notify, decode_tech, decode_param)
XiePhotoElement *element;
XieDataClass data_class;
XieLTriplet width;
XieLTriplet height;
XieLevels levels;
Bool notify;
XieDecodeTechnique decode_tech;
XiePointer decode_param;
Arguments
element Specifies the XiePhotoElement structure to use.
data_class      Specifies whether the data is single band or triple band.
width   Specifies the width of the image in pixels per band.
height  Specifies the height of the image in pixels per band.
levels  Specifies the number of quantization levels per band.
notify  Specifies whether to enable sending DecodeNotify events.
decode_tech     Specifies the decode technique required to interpret the image.
decode_param    Specifies the list of additional parameters required by decode_tech.
Description
An ImportClientPhoto element accepts image data from the protocol stream. This data may be
processed for display or used as process domain data. A process domain is inserted in many element
definitions and is used to restrict the element's processing to a subset of the source data pixels. The
attributes and organization of the expected data stream are fully specified by the parameters. The
actual transport of image data through the protocol stream is requested using XiePutClientData.

notify enables DecodeNotify events to be sent if anomalies are encountered while interpreting
the imported image data: either an error has been encountered while decoding an image or the image
data received does not satisfy the expected dimensions.

Only constrained data can be sent through the protocol stream; therefore, levels must be valid.

data_class specifies whether the data is single band or triple band and can be set to one of the
following standard data class values:

xieValSingleBand
xieValTripleBand

Decode techniques define the techniques that can be used to interpret uncompressed image data or
decode compressed images. decode_tech can be assigned one of the following standard decode
technique values:

xieValDecodeUncompressedSingle
xieValDecodeUncompressedTriple
xieValDecodeG31D
xieValDecodeG32D
xieValDecodeG42D
xieValDecodeJPEGBaseline
xieValDecodeJPEGLossless
xieValDecodeTIFF2
xieValDecodeTIFFPackBits

If a vendor defined additional private decode techniques, the values given to these techniques can be
assigned to decode_tech.
Output Attributes
Class   class of imported image
Type    constrained
Width   width of imported image (in pixels)
Height  height of imported image (in pixels)
Levels  levels of imported image
Structures
XieFloImportClientPhoto sets the XiePhotoElement structure field elemType to
xieElemImportClientPhoto, which identifies the element as an ImportClientPhoto, and sets
the fields of the member structure ImportClientPhoto using the arguments in the argument list.

typedef unsigned XieDataClass;
typedef unsigned XieDecodeTechnique;
typedef unsigned long XieLTriplet[3];
typedef unsigned long XieLevels[3];

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XieDataClass data_class;
                        XieLTriplet width;
                        XieLTriplet height;
                        XieLevels levels;
                        Bool notify;
                        XieDecodeTechnique decode_tech;
                        XiePointer decode_param;
                } ImportClientPhoto;
                ...
        } data;
} XiePhotoElement;

/* Definitions of DataClass */
#define xieValSingleBand        1
#define xieValTripleBand        2

/* Definitions for DecodeTechniques */
#define xieValDecodeUncompressedSingle  2
#define xieValDecodeUncompressedTriple  3
#define xieValDecodeG31D        4
#define xieValDecodeG32D        6
#define xieValDecodeG42D        8
#define xieValDecodeJPEGBaseline        10
#define xieValDecodeJPEGLossless        12
#define xieValDecodeTIFF2       14
#define xieValDecodeTIFFPackBits        16
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        levels is incompatible with the server's depth-handling capabilities
xieErrNoFloTechnique    Invalid decode_tech or decode_param
xieErrNoFloValue        Invalid width, height, levels (zero) or
invalid data_class
See Also
XieTecDecodeUncompressedSingle, XieTecDecodeUncompressedTriple, XieTecDecodeG31D,
XieTecDecodeG32D, XieTecDecodeG42D, XieTecDecodeTIFF2, XieTecDecodeTIFFPackBits,
XieTecDecodeJPEGBaseline, XieTecDecodeJPEGLossless
 XIElib - Photoflo Element Functions    XieFloImportClientROI
Name
XieFloImportClientROI - specify an ImportClientROI element and set its parameters
Syntax
void XieFloImportClientROI (element, rectangles);
XiePhotoElement *element;
unsigned int rectangles;
Arguments
element Specifies the XiePhotoElement structure to use.
rectangles      Specifies the number of rectangles expected.
Description
An ImportClientROI element accepts a list of rectangles from the protocol stream. These data can be
used as input to a process domain or an ExportROI or ExportClientROI element. A process domain is
inserted in many element definitions and is used to restrict the element's processing to a subset of the
source data pixels. The actual transport of data through the protocol stream is accomplished using
XiePutClientData (the band_number parameter of XiePutClientData is ignored).
Structures
XieFloImportClientROI sets the XiePhotoElement structure field elemType to
xieElemImportClientROI, which identifies the element as an ImportClientROI, and sets the
fields of the member structure ImportClientROI using the arguments in the argument list.

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        unsigned int rectangles;
                } ImportClientROI;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
See Also
XiePutClientData, XieQueryPhotoflo
XieFloExportROI, XieFloExportClientROI, XieFloImportROI
 XIElib - Photoflo Element Functions    XieFloImportDrawable
Name
XieFloImportDrawable - specify an ImportDrawable element and set its parameters
Syntax
void XieFloImportDrawable (element, drawable, src_x, src_y, width,
height, fill, notify)
XiePhotoElement *element;
Drawable drawable;
int src_x;
int src_y;
unsigned int width;
unsigned int height;
unsigned long fill;
Bool notify;
Arguments
element Specifies the XiePhotoElement structure to use.
drawable        Specifies the Drawable resource supplying the data.
src_x   Specifies the left corner of the region of the data to be imported.
src_y   Specifies the upper corner of the region of the data to be imported.
width   Specifies the width of the region of the data to be imported.
height  Specifies the height of the region of the data to be imported.
fill    Specifies the Colormap index to use for all regions that are obscured.
notify  Specifies whether to enable sending ImportObscured events.
Description
An ImportDrawable element allows access to data existing in a Drawable. This data may be
processed for display or, if drawable is one bit deep, used as process domain data. A process
domain is inserted in many element definitions and is used to restrict the element's processing to a
subset of the source data pixels.

notify enables ImportObscured events to be sent if data for one or more regions of a Window
are obscured and cannot be retrieved from backing store. The arguments src_x, src_y, width,
and height specify the region of data to be imported from drawable, where src_x and src_y
define the upper-left corner of the region.
Output Attributes
Class   single band
Type    constrained
Width   width
Height  height
Levels  2depth (that is, drawable depth)
Structures
XieFloImportDrawable sets the XiePhotoElement structure field elemType to
xieElemImportDrawable, which identifies the element as an ImportDrawable, and sets the
fields of the member structure ImportDrawable using the arguments in the argument list.

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        Drawable drawable;
                        int src_x;
                        int src_y;
                        unsigned int width;
                        unsigned int height;
                        unsigned long fill;
                        Bool notify;
                } ImportDrawable;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDrawable     Invalid drawable
xieErrNoFloValue        Invalid region width, height, src_x, src_y
 XIElib - Photoflo Element Functions    XieFloImportDrawablePlane
Name
XieFloImportDrawablePlane - specify an ImportDrawablePlane element and set its parameters
Syntax
void XieFloImportDrawablePlane (element, drawable, src_x, src_y,
width, height, fill, bit_plane, notify)
XiePhotoElement *element;
Drawable drawable;
int src_x;
int src_y;
unsigned int width;
unsigned int height;
unsigned long fill;
unsigned long bit_plane;
Bool notify;
Arguments
element Specifies the XiePhotoElement structure to use.
drawable        Specifies the Drawable resource supplying the data.
src_x   Specifies the left corner of the region of the data to be imported.
src_y   Specifies the upper corner of the region of the data to be imported.
width   Specifies the width of the region of the data to be imported.
height  Specifies the height of the region of the data to be imported.
fill    Specifies the Colormap index to use for all regions that are obscured.
bit_plane       Specifies the plane to be imported from drawable.
notify  Specifies whether to enable sending ImportObscured events.
Description
An ImportDrawablePlane event allows access to a single plane of data existing in a Drawable. This
data may be processed for display or used as process domain data. A process domain is inserted in
many element definitions and is used to restrict the element's processing to a subset of the source data
pixels.

notify enables ImportObscured events to be sent if data for one or more regions of a Window
are obscured and cannot be retrieved from backing store. The arguments src_x, src_y, width,
and height specify the region of data to be imported from drawable, where src_x and src_y
define the upper-left corner of the region.

bit_plane must have exactly one bit set to one (1), and the value of bit_plane must be less than
or equal to  , where n is the depth of drawable. This single bit selects the corresponding bit to
be extracted from pixels within drawable.
Output Attributes
Class   single band
Type    constrained
Width   width
Height  height
Levels  2
Structures
XieFloImportDrawablePlane sets the XiePhotoElement structure field elemType to
xieElemImportDrawablePlane, which identifies the element as an ImportDrawablePlane, and
sets the fields of the member structure ImportDrawablePlane using the arguments in the
argument list.

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        Drawable drawable;
                        int src_x;
                        int src_y;
                        unsigned int width;
                        unsigned int height;
                        unsigned long fill;
                        unsigned long bit_plane;
                        Bool notify;
                } ImportDrawablePlane;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDrawable     Invalid drawable
xieErrNoFloValue        Invalid bit_plane or region width, height, src_x, src_y
 XIElib - Photoflo Element Functions    XieFloImportLUT
Name
XieFloImportLUT - specify an ImportLUT element and set its parameters
Syntax
void XieFloImportLUT (element, lut)
XiePhotoElement *element;
XieLut lut;
Arguments
element Specifies the XiePhotoElement structure to use.
lut     Specifies the LUT resource supplying the lookup table.
Description
An ImportLUT element allows access to lookup table data existing in a LUT resource. These data are
accepted by the Point, ExportLUT, and ExportClientLUT elements.

Attributes of the lookup table data are inherited from lut.
Structures
XieFloImportLUT sets the XiePhotoElement structure field elemType to
xieElemImportLUT, which identifies the element as an ImportLUT, and sets the fields of the
member structure ImportLUT using the arguments in the argument list.

typedef XID XieLut;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XieLut lut;
                } ImportLUT;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAccess       Attempt to import from lut before it has been populated
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloLUT  An unknown lut has been specified
 XIElib - Photoflo Element Functions    XieFloImportPhotomap
Name
XieFloImportPhotomap - specify an ImportPhotomap element and set its parameters
Syntax
void XieFloImportPhotomap (element, photomap, notify)
XiePhotoElement *element;
XiePhotomap photomap;
Bool notify;
Arguments
element Specifies the XiePhotoElement structure to use.
photomap        Specifies the photomap resource supplying image data.
notify  Specifies whether to enable sending DecodeNotify events.
Description
An ImportPhotomap element allows access to image data existing in a photomap; a photomap is a
server resource that can be used to store image data. This data may be processed for display or used as
process domain data (if its levels attribute is 2), or it may be used as source to ExportPhotomap or
ExportClientPhoto or any other element which takes image data as input. A process domain is
inserted in many element definitions and is used to restrict the element's processing to a subset of the
source data pixels.

notify enables DecodeNotify events to be sent if anomalies are encountered while decoding
compressed data: either an error has been encountered while decoding an image or the image data
received does not satisfy the expected dimensions.

Attributes of the source data are inherited from photomap.
Output Attributes
Class   same as photomap
Type    same as photomap
Width   same as photomap
Height  same as photomap
Levels  same as photomap
Structures
XieFloImportPhotomap sets the XiePhotoElement structure field elemType to
xieElemImportPhotomap, which identifies the element as an ImportPhotomap, and sets the
fields of the member structure ImportPhotomap using the arguments in the argument list.

typedef XID XiePhotomap;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhotomap photomap;
                        Bool notify;
                } ImportPhotomap;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAccess       Attempt to import from photomap before it has been populated
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloPhotomap     An unknown photomap has been specified
See Also
XieFloExportPhotomap, XIeFloExportClientPhoto

 XIElib - Photoflo Element Functions    XieFloImportROI
Name
XieFloImportROI - specify an ImportROI element and set its parameters
Syntax
void XieFloImportROI (element, roi)
XiePhotoElement *element;
XieRoi roi;
Arguments
element Specifies the XiePhotoElement structure to use.
roi     Specifies the ID of the ROI supplying the list-of-rectangles.
Description
An ImportROI element allows access to a list-of-rectangles existing in a ROI resource. This data may
be referenced by a process domain, or used as input to an ExportClientROI or ExportROI element. A
process domain is inserted in many element definitions and is used to restrict the element's processing
to a subset of the source data pixels.
Structures
XieFloImportROI sets the XiePhotoElement structure field elemType to
xieElemImportROI, which identifies the element as an ImportROI, and sets the fields of the
member structure ImportROI using the arguments in the argument list.

typedef XID XieRoi;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XieRoi roi;
                } ImportROI;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAccess       Attempt to import from roi before it has been populated
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloPhotomap     An unknown roi has been specified
See Also
XieFloExportROI, XieFloExportClientROI

 XIElib - Photoflo Element Functions    XieFloArithmetic
Name
XieFloArithmetic - specify an Arithmetic element and set its parameters
Syntax
void XieFloArithmetic (element, src1, src2, domain, constant,
operator, band_mask)
XiePhotoElement *element;
XiePhototag src1;
XiePhototag src2;
XieProcessDomain *domain;
XieConstant constant;
XieArithmeticOp operator;
unsigned int band_mask;
Arguments
element Specifies the XiePhotoElement structure to use.
src1    Specifies the phototag of the first data source.
src2    Specifies the phototag of the second data source, or 0 if none.
domain  Specifies the subset of source data that will be operated on.
constant        Specifies the constant data source (if src2 is 0).
operator        Specifies the arithmetic operation to be performed.
band_mask       Specifies which bands are to be operated on.
Description
An Arithmetic element produces output data by performing an addition, subtraction, minimum, or
maximum operation between two data sources or between a single data source and a constant.
Furthermore, multiplication, division, or gamma correction may by applied to a single data source.

When two sources are involved, src1 and src2 are the phototags of the elements supplying source
data (constant is ignored). A phototag is the position or index of an element within an array of
elements used to specify a photoflo; the first element in the array has a phototag value of one (1). If
the operation is to involve a constant, src1 is one operand, src2 must be zero, and constant is
used as the other operand.

When two sources are involved, all attributes, other than width and height, must match; all
output attributes are inherited from src1.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. If the entire source data is to be operated on, a pointer to an XieProcessDomain
structure must still be provided, with the phototag field set to zero (0); the offset_x and
offset_y fields are ignored.

Only bands selected by band_mask are subject to processing. Other bands present in the image are
passed through to the output. For example, a band_mask of 0012 indicates that only the least
significant band would be processed; operating on all bands requires a band_mask of 1112. Using
band_mask to select source data that have two (2) or less levels is not permitted.

Pixel computations that would lead to errors, will yield valid server-dependent values (for example,
dividing by a constrained pixel value of zero might result in a value of levels-1).

The valid operations for the Arithmetic process element are:

Operator
src1 (operator) src2
src1 (operator) constant
xieValAdd
src1 + src2
src1 + constant
xieValSub
src1 - src2
src1 - constant
xieValSubRev
src2 - src1
constant - src1
xieValMul

src1 * constant
xieValDiv

src1 / constant
xieValDivRev

constant / src1
xieValMin
minimum( src1, src2 )
minimum( src1, constant )
xieValMax
maximum( src1, src2 )
maximum( src1, constant )
xieValGamma
(constrained)

(levels - 1) * ((src1 / (levels - 1))constant)
xieValGamma
(unconstrained)

src1constant
Output Attributes
Class   same as src1
Type    same as src1
Width   same as src1
Height  same as src1
Levels  same as src1
Structures
XieFloArithmetic sets the XiePhotoElement structure field elemType to
xieElemArithmetic, which identifies the element as an Arithmetic, and sets the fields of the
member structure Arithmetic using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef float XieConstant[3];
typedef unsigned XieArithmeticOp;
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src1;
                        XiePhototag src2;
                        XieProcessDomain domain;
                        XieConstant constant;
                        XieArithmeticOp operator;
                        unsigned int band_mask;
                } Arithmetic;
                ...
        } data;
} XiePhotoElement;

/* Definitions of ArithmeticOperations */
#define xieValAdd       1
#define xieValSub       2
#define xieValSubRev    3
#define xieValMul       4
#define xieValDiv       5
#define xieValDivRev    6
#define xieValMin       7
#define xieValMax       8
#define xieValGamma     9
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Class, type, or levels differ between src1 and src2 or
selected data source are bitonal
xieErrNoFloOperator     Invalid operator
xieErrNoFloSource       Invalid src1 or src2 or
src2 has been specified with a monadic operator
 XIElib - Photoflo Element Functions    XieFloBandCombine
Name
XieFloBandCombine - specify a BandCombine element and set its parameters
Syntax
void XieFloBandCombine (element, src1, src2, src3)
XiePhotoElement *element;
XiePhototag src1;
XiePhototag src2;
XiePhototag src3;
Arguments
element Specifies the XiePhotoElement structure to use.
src1    Specifies the first element supplying source data.
src2    Specifies the second element supplying source data.
src3    Specifies the third element supplying source data.
Description
A BandCombine element merges three single band data sources to produce a triple band result. The
arguments src1, src2, and src3 must be of the same type, and each source must be single band.
Other attributes that are taken from the individual sources may differ. The output will be triple band.
Output Attributes
Class   triple band
Type    same as src1
Width   same as srcs
Height  same as srcs
Levels  same as srcs
Structures
XieFloBandCombine sets the XiePhotoElement structure field elemType to
xieElemBandCombine, which identifies the element as a BandCombine, and sets the fields of the
member structure BandCombine using the arguments in the argument list.

typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src1;
                        XiePhototag src2;
                        XiePhototag src3;
                } BandCombine;
                ...
        } data;
} XiePhotoElement;

Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        A source has more than one band or
type differs between sources
xieErrNoFloSource       Invalid src1, src2, or src3
 XIElib - Photoflo Element Functions    XieFloBandExtract
Name
XieFloBandExtract - specify a BandExtract element and set its parameters
Syntax
void XieFloBandExtract (element, src, levels, bias, coefficients)
XiePhotoElement *element;
XiePhototag src;
unsigned int levels;
double bias;
XieConstant coefficients;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
levels  Specifies the number of quantization levels for the output.
bias    Specifies the value to be added to each output pixel.
coefficients    Specifies the proportion of each band in src to pixelsin the single
band result.
Description
A BandExtract element produces single band output data from a triple band source by multiplying a
pixel value from each source band by its corresponding coefficient and then summing the results with
the bias value.

coefficients is a three-element array that determines the proportion of each source band pixel
that is used to form the output. levels is used as the levels attribute of the output data if the src
data are constrained; otherwise, it is ignored.

The source data must be triple band, and all bands must have equal dimensions. The output data will
be single band, with levels taken from the levels parameter, if the data type is constrained. All
other attributes are inherited from src.
Output Attributes
Class   single band
Type    same as src
Width   same as src
Height  same as src
Levels  levels if src is contrained, else unknown
Structures
XieFloBandExtract sets the XiePhotoElement structure field elemType to
xieElemBandExtract, which identifies the element as a BandExtract, and sets the fields of the
member structure BandExtract using the arguments in the argument list.

typedef float XieConstant[3];
typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        unsigned int levels;
                        float bias;
                        XieConstant coefficients;
                } BandExtract;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        src is not triple band or
unequal interband dimensions
xieErrNoFloSource       Invalid src
 XIElib - Photoflo Element Functions    XieFloBandSelect
Name
XieFloBandSelect - specify a BandSelect element and set its parameters
Syntax
void XieFloBandSelect (element, src, band_number)
XiePhotoElement *element;
XiePhototag src;
unsigned int band_number;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
band_number     Specifies which src band is to be selected to provide the output data.
Description
A BandSelect element produces single band output data by selecting a single band from a triple band
source.
Output Attributes
Class   single band
Type    same as src
Width   same as band selected from src
Height  same as band selected from src
Levels  same as band selected from src
Structures
XieFloBandSelect sets the XiePhotoElement structure field elemType to
xieElemBandSelect, which identifies the element as a BandSelect, and sets the fields of the
member structure BandSelect using the arguments in the argument list.

typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        unsigned int band_number;
                } BandSelect;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        src is not triple band
xieErrNoFloSource       Invalid src
xieErrNoFloValue        Invalid band_number
 XIElib - Photoflo Element Functions    XieFloBlend
Name
XieFloBlend - specify a Blend element and set its parameters
Syntax
void XieFloBlend (element, src1, src2, src_constant, alpha,
alpha_const, domain, band_mask)
XiePhotoElement *element;
XiePhototag src1;
XiePhototag src2;
XieConstant src_constant;
XiePhototag alpha;
double alpha_const;
XieProcessDomain *domain;
unsigned int band_mask;
Arguments
element Specifies the XiePhotoElement structure to use.
src1    Specifies the phototag of the first data source.
src2    Specifies the phototag of the second data source, else 0.
src_constant    Specifies a constant data source, if src2 is 0.
alpha   Specifies the blend proportion for each processed pixel.
alpha_const     Specifies the constant blend proportion for each processed pixel.
domain  Specifies the subset of source data that will be operated on.
band_mask       Specifies which bands are to be operated on.
Description
A Blend element produces output data from two data sources or a single data source and a constant.
Each output pixel is a percentage combination of the source values, as controlled by an alpha input
image or an alpha constant.

When two sources are involved, src1 and src2 are the phototags of the elements supplying source
data; src_constant is ignored. A phototag is the position or index of an element within an array
of elements used to specify a photoflo; the first element in the array has a phototag value of one (1). If
the operation is to involve a constant, src1 is one operand, src2 must be zero, and
src_constant is used as the other operand. If alpha is nonzero, it controls the blend proportion
for each pixel that is processed, otherwise alpha_const provides this control. Domain may control
the subset of source data that will be operated on. Only bands selected by the band_mask are subject
to processing. Other bands present in the image are passed through to the output. For example, a
band_mask of 0012 indicates that only the least significant band would be processed; operating on
all bands requires a band_mask of 1112. Using band_mask to select source data that have two (2)
or less levels is not permitted.

When two sources are involved, all attributes, other that width and height, must match. If alpha
is nonzero, it must be a source of constrained data.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. If the entire source data is to be operated on, a pointer to an XieProcessDomain
structure must still be provided, with the phototag field set to zero (0); the offset_x and
offset_y fields are ignored.

Within the intersection of the source(s) and domain, each output pixel is a blend of the
corresponding pixels from src1 and src2 (or src1 pixels blended with src_constant). The
degree of blend is determined by the corresponding pixel taken from alpha or the value of
alpha_const. If alpha is nonzero, the proportion of blend is further scaled by alpha_const:

output = src1 * (1 - alpha / alpha_const) + src2 * (alpha / alpha_const)
(where alpha_const is greater than 0.0)

if alpha is zero:

output = src1 * (1 - alpha_const) + src2 * alpha_const
(where alpha_const is in the range [0.0, 1.0])
Output Attributes
Class   same as src1
Type    same as src1
Width   same as src1
Height  same as src1
Levels  same as src1
Structures
XieFloBlend sets the XiePhotoElement structure field elemType to xieElemBlend,
which identifies the element as a Blend, and sets the fields of the member structure Blend using the
arguments in the argument list.

typedef unsigned XiePhototag;
typedef float XieConstant[3];
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src1;
                        XiePhototag src2;
                        XieConstant src_constant;
                        XiePhototag alpha;
                        float alpha_constant;
                        XieProcessDomain domain;
                        unsigned int band_mask;
                } Blend;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        Incompatible attributes between src1 and src2 or
alpha is unconstrained or
selected source data are bitonal
xieErrNoFloSource       Invalid src1, src2, or alpha
xieErrNoFloValue        alpha is zero and alpha_const is outside the range [0.0,1.0], or
alpha is nonzero and alpha_const is nonpositive
 XIElib - Photoflo Element Functions    XieFloCompare
Name
XieFloCompare - specify a Compare element and set its parameters
Syntax
void XieFloCompare (element, src1, src2, domain, constant, operator,
combine, band_mask)
XiePhotoElement *element;
XiePhototag src1;
XiePhototag src2;
XieProcessDomain *domain;
XieConstant constant;
XieCompareOp operator;
Bool combine;
unsigned int band_mask;
Arguments
element Specifies the XiePhotoElement structure to use.
src1    Specifies the first data source.
src2    Specifies the second data source.
domain  Specifies the subset of source data that will be operated on.
constant        Specifies the constant data source.
operator        Specifies the logical predicate operator used in the comparison.
combine Specifies whether the comparison should be done on a per-band or on
an all-bands basis.
band_mask       Specifies which bands are to be operated on.
Description
A Compare element takes two data sources or a single data source and a constant and generates a
Boolean bitmap output that reflects the results of a pointwise comparison. The output data has a value
of one wherever the comparison is true, and a value of zero everywhere else (that is, comparison false
or comparison not performed). The comparison may be performed on a per-band basis or for all bands
taken together.

When two sources are involved, src1 and src2 are the phototags of the elements supplying source
data; constant is ignored. A phototag is the position or index of an element within an array of
elements used to specify a photoflo; the first element in the array has a phototag value of one (1). If
the operation is to involve a constant, src1 is one operand, src2 must be zero, and constant is
used as the other operand.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. If the entire source data is to be operated on, a pointer to an XieProcessDomain
structure must still be provided, with the phototag field set to zero (0); the offset_x and
offset_y fields are ignored.

operator is the logical predicate operator used in the comparison. The valid operators for the
Compare process element are:

Operator
src1 (operator) src2
src1 (operator) constant
xieValLT
src1 *  src2
src1 * constant
xieValLE
src1 * src2
src1 * constant
xieValEQ
src1 * src2
src1 * constant
xieValNE
src1 * src2
src1 * constant
xieValGT
src1 * src2
src1 * constant
xieValGE
src1 * src2
src1 * constant

combine is a Boolean that determines whether the comparison should be done on a per-band basis
or on an all-bands basis. Only bands selected by band_mask are subject to processing. Other bands
present in the image are passed through to the output. For example, a band_mask of 0012 indicates
that only the least significant band would be processed; operating on all bands requires a
band_mask of 1112.

If combine is True or src1 is single band, the output data will form a single Boolean bitmap. If
src1 is triple band and combine is False, the output data will yield three separate boolean
bitmaps (for this case band_mask must specify all bands).

If src1 is triple band and combine is True, only the EQ and NE operators are allowed; equality is
established for each band selected by band_mask, and then the result is logically ANDed to derive
equality (inequality is a logical NOT of this result). For this case, width and height must match for all
bands selected by band_mask.

The relationship between combine and data class dependencies is given in the following table:

combine
input class
band_mask
output class
True
single band
n/a
single band

triple band
selected bands
single band
False
single band
n/a
single band

triple band
all bands
triple band
Output Attributes
Class   see Description
Type    constrained
Width   same as src1
Height  same as src1
Levels  2 per band (see Description)
Structures
XieFloCompare sets the XiePhotoElement structure field elemType to
xieElemCompare, which identifies the element as a Compare, and sets the fields of the member
structure Compare using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef float XieConstant[3];
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src1;
                        XiePhototag src2;
                        XieProcessDomain domain;
                        XieConstant constant;
                        XieCompareOp operator;
                        Bool combine;
                        unsigned int band_mask;
                } Compare;
                ...
        } data;
} XiePhotoElement;

/* Definitions of Compare Operators */
#define xieValLT        1
#define xieValLE        2
#define xieValEQ        3
#define xieValNE        4
#define xieValGT        5
#define xieValGE        6
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Class differs between src1 and src2 or
invalid combination of operator and combine or
triple band, and combine is false, and band_mask incomplete
xieErrNoFloOperator     Invalid operator
xieErrNoFloSource       Invalid src1 or src2
 XIElib - Photoflo Element Functions    XieFloConstrain
Name
XieFloConstrain - specify a Constrain element and set its parameters
Syntax
void XieFloConstrain (element, src, levels, constrain_tech,
constrain_param)
XiePhotoElement *element;
XiePhototag src;
XieLevels levels;
XieConstrainTechnique constrain_tech;
XiePointer constrain_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
levels  Specifies the number of quantization levels desired in the output data.
constrain_tech  Specifies the technique to be used when constraining the data.
constrain_param Specifies the list of additional parameters required by constrain.
Description
A Constrain element applies a quantization model to the image data to convert the data to a fixed
number of quantization levels. Application of the quantization model may involve steps such as range
shifting, scaling, clipping, and rounding.

src is the phototag of the element supplying source data. A phototag is the position or index of an
element within an array of elements used to specify a photoflo; the first element in the array has a
phototag value of one (1). Levels is the number of quantization levels desired in the output data.
constrain_tech specifies the constrain technique to be used when constraining the data.
constrain_param is the list of additional parameters required by constrain_tech.

If the input image is already constrained, the data will be reconstrained.

One of the following standard constrain technique values can be assigned to constrain_tech :

xieValConstrainClipScale
xieValConstrainHardClip

If a vendor defined additional private constrain techniques, the values given to these techniques can
be assigned to constrain_tech.
Output Attributes
Class   same as src
Type    constrained
Width   same as src
Height  same as src
Levels  levels
Structures
XieFloConstrain sets the XiePhotoElement structure field elemType to
xieElemConstrain, which identifies the element as a Constrain, and sets the fields of the
member structure Constrain using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef unsigned long XieLevels[3];
typedef unsigned XieConstrainTechnique;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieLevels levels;
                        XieConstrainTechnique constrain_tech;
                        XiePointer constrain_param;
                } Constrain;
                ...
        } data;
} XiePhotoElement;

/* Definitions for ConstrainTechniques */
#define xieValConstrainClipScale        2
#define xieValConstrainHardClip 4
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid constrain_tech or constrain_param
See Also
XieTecClipScale
 XIElib - Photoflo Element Functions    XieFloConvertFromIndex
Name
XieFloConvertFromIndex - specify a ConvertFromIndex element and set its parameters
Syntax
void XieFloConvertFromIndex (element, src, colormap, data_class,
precision)
XiePhotoElement *element;
XiePhototag src;
Colormap colormap;
XieDataClass data_class;
unsigned int precision;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
colormap        Specifies the Colormap from which to obtain output pixel values.
data_class      Specifies whether the output data is single band or triple band.
precision       Specifies the number of bits to be used from  colormap's RGB
values.
Description
A ConvertFromIndex element converts Colormap index data into achromatic or trichromatic data.

data_class specifies whether  the output data is single band or triple band and can be set to one of
the following standard data class values:

xieValSingleBand
xieValTripleBand

If data_class is single band and a trichromatic colormap is specified (static color, pseudo color,
true color, or direct color), the gray shade for each pixel is taken from the red values in colormap.
If data_class is triple band and an achromatic colormap is specified (static gray or gray scale),
the red band will be replicated to populate the green and blue output bands.

The depth of colormap must match the Levels attribute of src (that is, 2depth must equal Levels).
Output Attributes
Class   data_class
Type    constrained
Width   same as src
Height  same as src
Levels  2precision (per band)
Structures
XieFloConvertFromIndex sets the XiePhotoElement structure field elemType to
xieElemConvertFromIndex, which identifies the element as a ConvertFromIndex, and sets the
fields of the member structure ConvertFromIndex using the arguments in the argument list.

typedef unsigned XieDataClass;
typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        Colormap colormap;
                        XieDataClass data_class;
                        unsigned int precision;
                } ConvertFromIndex;
                ...
        } data;
} XiePhotoElement;

/* Definitions of DataClass */
#define xieValSingleBand        1
#define xieValTripleBand        2
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloColormap     Invalid colormap
xieErrNoFloMatch        Levels of src do not match depth of colormap
xieErrNoFloSource       Invalid src
xieErrNoFloValue        Invalid data_class or precision
 XIElib - Photoflo Element Functions    XieFloConvertFromRGB
Name
XieFloConvertFromRGB - specify a ConvertFromRGB element and set its parameters
Syntax
void XieFloConvertFromRGB (element, src, color_space, color_param)
XiePhotoElement *element;
XiePhototag src;
XieColorspace color_space;
XiePointer color_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data (RGB assumed).
color_space     Specifies the technique to be used in the conversion.
color_param     Specifies the list of additional parameters required by color_space.
Description
A ConvertFromRGB element converts RGB source data to an alternate colorspace.

The source data must be triple band, and all bands must have equal dimensions. The type and levels
of the output data are determined by the color_space's technique parameters. All other attributes
are inherited from src.

ConvertFromRGB techniques define the trichromatic colorspaces known to a ConvertFromRGB
element. One of the following standard ConvertFromRGB technique values can be assigned to
color_space:

xieValRGBToCIELab
xieValRGBToCIEXYZ
xieValRGBToYCbCr
xieValRGBToYCC

If a vendor defined additional private ConvertFromRGB techniques, the private technique values
given to these techniques can be assigned to color_space.
Output Attributes
Class   triple band
Type    color_space dependent
Width   same as src
Height  same as src
Levels  color_space dependent
Structures
XieFloConvertFromRGB sets the XiePhotoElement structure field elemType to
xieElemConvertFromRGB, which identifies the element as a ConvertFromRGB, and sets the
fields of the member structure ConvertFromRGB using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef unsigned XieColorspace;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieColorspace color_space;
                        XiePointer color_param;
                } ConvertFromRGB;
                ...
        } data;
} XiePhotoElement;

/* Definitions for Colorspace Conversions */
#define xieValRGBToCIELab       2
#define xieValRGBToCIEXYZ       4
#define xieValRGBToYCbCr        6
#define xieValRGBToYCC  8
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        src is not triple band or
unequal inter-band dimensions
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid color_space or color_param
See Also
XieFloConvertToRGB, XieTecRGBToCIELab, XieTecRGBToCIEXYZ, XieTecRGBToYCbCr,
XieTecRGBToYCC
 XIElib - Photoflo Element Functions    XieFloConvertToIndex
Name
XieFloConvertToIndex - specify a ConvertToIndex element and set its parameters
Syntax
void XieFloConvertToIndex (element, src, colormap, color_list,
notify, color_alloc_tech, color_alloc_param)
XiePhotoElement *element;
XiePhototag src;
Colormap colormap;
XieColorList color_list;
Bool notify;
XieColorAllocTechnique color_alloc_tech;
XiePointer color_alloc_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying the constrained source data.
colormap        Specifies the Colormap from which to obtain output pixel values.
color_list      Specifies the list where Colormap indices are to be stored.
notify  Specifies whether to enable sending ColorAlloc events.
color_alloc_tech        Specifies the desired color allocation technique.
color_alloc_param       Specifies the list of additional parameters required by
color_alloc_tech.
Description
A ConvertToIndex element allocates and/or matches colors or gray shades, as required, from a
Colormap. It produces pixel indices as output data, and records indices that it allocates in
color_list.

The specified color_alloc_tech technique may generate a ColorAlloc event to warn the
client that results are of lesser fidelity than desired. Notify allows the client to be notified about
inferior results from color allocation or matching.

src is the phototag of the element supplying constrained source data. A phototag is the position or
index of an element within an array of elements used to specify a photoflo; the first element in the
array has a phototag value of one (1). Colormap is the Colormap from which colors or gray shades
are allocated and/or matched. Color_list is the list where allocated Colormap indices are to be stored.
color_alloc_tech specifies the desired color allocation technique. color_alloc_params is
the list of additional parameters required by color_alloc_tech.

color_list is purged of any colors it already contains when photoflo execution begins. Allocated
Colormap indices can be freed using XiePurgeColorList, XieDestroyColorList, or by
making color_list the target of an active photoflo. Care must be taken to ensure that
color_list is not referenced by more than one executing photoflo at any time; it is a protocol
error to allow more than one executing photoflo access the same color_list.

ColorAlloc techniques define the recognized color allocation techniques used by the ConvertToIndex
element. One of the following standard ColorAlloc technique values can be assigned to
color_alloc_tech:

xieValColorAllocDefault
xieValColorAllocAll
xieValColorAllocMatch
xieValColorAllocRequantize

If a vendor defined additional private ColorAlloc techniques, the private technique values given to
these techniques can be assigned to color_alloc_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined or a private technique.
Output Attributes
Class   single band
Type    constrained
Width   same as src
Height  same as src
Levels  2depth (that is, colormap depth)
Structures
XieFloConvertToIndex sets the XiePhotoElement structure field elemType to
xieElemConvertToIndex, which identifies the element as a ConvertToIndex, and sets the fields
of the member structure ConvertToIndex using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef XID XieColorList;
typedef unsigned XieColorAllocTechnique;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        Colormap colormap;
                        XieColorList color_list;
                        Bool notify;
                        XieColorAllocTechnique color_alloc_tech;
                        XiePointer color_alloc_param;
                } ConvertToIndex;
                ...
        } data;
} XiePhotoElement;

/* Definitions for ColorAlloc Techniques */
#define xieValColorAllocDefault 0
#define xieValColorAllocAll     2
#define xieValColorAllocMatch   4
#define xieValColorAllocRequantize      6
Errors
xieErrNoFloAccess       color_list already being used by another active photoflo
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloColorlist    Invalid color_list
xieErrNoFloColormap     Invalid colormap
xieErrNoFloMatch        Unequal inter-band dimensions
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid color_alloc_tech or color_alloc_param
See Also
XieCreateColorList, XiePurgeColorList, XieDestroyColorList
XieTecColorAllocAll, XieTecColorAllocMatch, XieTecColorAllocRequantize
 XIElib - Photoflo Element Functions    XieFloConvertToRGB
Name
XieFloConvertToRGB - specify a ConvertToRGB element and set its parameters
Syntax
void XieFloConvertToRGB (element, src, color_space, color_param)
XiePhotoElement *element;
XiePhototag src;
XieColorspace color_space;
XiePointer color_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
color_space     Specifies the technique that will be used for the conversion.
color_param     Specifies the list of additional parameters required by color_space.
Description
A ConvertToRGB element converts alternate colorspace source data into RGB data.

The source data must be triple band, and all bands must have equal dimensions. The type and levels
of the output data are determined by the color_space's technique parameters. All other attributes
are inherited from src.

ConvertToRGB techniques define the trichromatic colorspaces known to a ConvertToRGB element.
One of the following standard ConvertFromRGB technique values can be assigned to
color_space:

xieValCIELabToRGB
xieValCIEXYZToRGB
xieValYCbCrToRGB
xieValYCCToRGB

If a vendor defined additional private ConvertToRGB techniques, the private technique values given
to these techniques can be assigned to color_space.
Output Attributes
Class   triple band
Type    color_space dependent
Width   same as src
Height  same as src
Levels  color_space dependent
Structures
XieFloConvertToRGB sets the XiePhotoElement structure field elemType to
xieElemConvertToRGB, which identifies the element as a ConvertToRGB, and sets the fields of
the member structure ConvertToRGB using the arguments in the argument list.

typedef unsigned XieColorspace;
typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieColorspace color_space;
                        XiePointer color_param;
                } ConvertToRGB;
                ...
        } data;
} XiePhotoElement;

/* Definitions for Colorspace Conversions */
#define xieValCIELabToRGB       2
#define xieValCIEXYZToRGB       4
#define xieValYCbCrToRGB        6
#define xieValYCCToRGB  8
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        src is not triple band or
unequal inter-band dimensions
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid color_space or color_param
See Also
XieTecCIELabToRGB, XieTecCIEXYZToRGB, XieTecYCbCrToRGB, XieTecYCCToRGB,
XieConvertFromRGB
 XIElib - Photoflo Element Functions    XieFloConvolve
Name
XieFloConvolve - specify a Convolve element and set its parameters
Syntax
void XieFloConvolve (element, src, domain, kernel, kernel_size,
band_mask, convolve_tech, convolve_param)
XiePhotoElement *element;
XiePhototag src;
XieProcessDomain *domain;
float *kernel;
int kernel_size;
unsigned int band_mask;
XieConvolveTechnique convolve_tech;
XiePointer convolve_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
domain  Specifies the subset of the image that will be operated on.
kernel  Specifies the coefficients used in the convolution process.
kernel_size     Specifies the dimension of kernel.
band_mask       Specifies which bands are to be operated on.
convolve_tech   Specifies the technique for handling edge conditions.
convolve_param  Specifies the list of additional parameters required by
convolve_tech.
Description
A Convolve element produces output data by convolving each input pixel value (and surrounding
area) with the specified convolution kernel.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. If the entire source data is to be operated on, a pointer to an XieProcessDomain
structure must still be provided, with the phototag field set to zero (0); the offset_x and
offset_y fields are ignored.

kernel represents a square array of float data that has odd dimensions.  Thus, a single dimension is
used to specify kernel_size.

Only bands selected by the band_mask are subject to processing. Other bands present in the image
are passed through to the output. For example, a band_mask of 0012 indicates that only the least
significant band would be processed; operating on all bands requires a band_mask of 1112. Using
band_mask to select source data that have two (2) or less levels is not permitted.

All output data attributes are inherited from the source data.

Convolve techniques provide various methods of handling edge conditions. These techniques
determine what pixel values are used when Convolve requires data beyond the image bounds. One of
the following standard convolve technique values can be assigned to convolve_tech:

xieValConvolveDefault
xieValConvolveConstant
xieValConvolveReplicate

If a vendor defined additional private convolve techniques, the private technique values given to these
techniques can be assigned to convolve_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined above or a private technique.
Output Attributes
Class   same as src
Type    same as src
Width   same as src
Height  same as src
Levels  same as src
Structures
XieFloConvolve sets the XiePhotoElement structure field elemType to
xieElemConvolve, which identifies the element as a Convolve, and sets the fields of the member
structure Convolve using the arguments in the argument list.

typedef unsigned XieConvolveTechnique;
typedef unsigned XiePhototag;
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieProcessDomain domain;
                        float *kernel;
                        int kernel_size;
                        unsigned int band_mask;
                        XieConvolveTechnique convolve_tech;
                        XiePointer convolve_param;
                } Convolve;
                ...
        } data;
} XiePhotoElement;

/* Definitions for ConvolveTechniques */
#define xieValConvolveDefault   0
#define xieValConvolveConstant  2
#define xieValConvolveReplicate 4
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Selected source data are bitonal
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid convolve_tech or convolve_param
xieErrNoFloValue        Invalid kernel_size (for example, not odd)
See Also
XieTecConvolveConstant
 XIElib - Photoflo Element Functions    XieFloDither
Name
XieFloDither - specify a Dither element and set its parameters
Syntax
void XieFloDither (element, src, band_mask, levels, dither_tech,
dither_param)
XiePhotoElement *element;
XiePhototag src;
unsigned int band_mask;
XieLevels levels;
XieDitherTechnique dither_tech;
XiePointer dither_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
band_mask       Specifies which bands are to be operated on.
levels  Specifies the number of levels desired in the output data.
dither_tech     Specifies the desired dither technique.
dither_param    Specifies the list of additional parameters required by dither_tech.
Description
The Dither element is used to reduce the number of quantization levels in an image. It accomplishes
this by affecting adjacent pixels (area affect) to make up for the lack of depth resolution.

Only bands selected by the band_mask are subject to processing. Other bands present in the image
are passed through to the output. For example, a band_mask of 0012 indicates that only the least
significant band would be processed; operating on all bands requires a band_mask of 1112. Using
band_mask to select source data that have two (2) or less levels is not permitted.

The source data must be constrained.

Dither techniques define the technique that can be used to dither an image. One of the following
standard dither technique values can be assigned to dither_tech:

xieValDitherDefault
xieValDitherErrorDiffusion
xieValDitherOrdered

If a vendor defined additional private dither techniques, the private technique values given to these
techniques can be assigned to dither_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined  or a private technique.
Output Attributes
Class   same as src
Type    constrained
Width   same as src
Height  same as src
Levels  levels
Structures
XieFloDither sets the XiePhotoElement structure field elemType to xieElemDither,
which identifies the element as a Dither, and sets the fields of the member structure Dither using
the arguments in the argument list.

typedef unsigned XiePhototag;
typedef unsigned long XieLevels[3];
typedef unsigned XieDitherTechnique;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieLevels levels;
                        unsigned int band_mask;
                        XieDitherTechnique dither_tech;
                        XiePointer dither_param;
                } Dither;
                ...
        } data;
} XiePhotoElement;

/* Definitions for DitherTechniques */
#define xieValDitherDefault     0
#define xieValDitherErrorDiffusion      2
#define xieValDitherOrdered     4
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Unconstrained src data or
selected source data are bitonal
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid dither_tech or dither_param
xieErrNoFloValue        Invalid output levels: less than two or greater than src levels
See Also
XieTecDitherOrdered
 XIElib - Photoflo Element Functions    XieFloGeometry
Name
XieFloGeometry - specify a Geometry element and set its parameters
Syntax
void XieFloGeometry (element, src, width, height, coefficients,
constant, band_mask, sample_tech, sample_param)
XiePhotoElement *element;
XiePhototag src;
unsigned int width;
unsigned int height;
float coefficients[6];
XieConstant constant;
unsigned int band_mask;
XieGeometryTechnique sample_tech;
XiePointer sample_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
width   Specifies the horizontal dimension of the output data.
height  Specifies the vertical dimension of the output data.
coefficients    Specifies an affine transformation to be applied to pixels in src.
constant        Specifies the fill value used for output pixels that do not map back to a
src pixel.
band_mask       Specifies which bands are to be operated on.
sample_tech     Specifies the technique to be used for retrospectively resampling src.
sample_param    Specifies the list of additional parameters required by sample_tech.
Description
A Geometry element is used to perform geometric transformations on image data. Linear geometric
resampling operations are implemented, such as: crop, mirror, scale, shear, rotate, translate, and
combinations thereof.

A Geometry element can be visualized as stepping through each possible output pixel location in turn
and computing the location from which to obtain each input pixel value. Each pixel (x',y') in the
output image is mapped to the coordinate location (x,y) in src by:



The coordinate mapping coefficients (a,b,c,d,tx,ty), together with the output width and
height, fully specify the geometric transformation. The following briefly (and approximately)
summarizes the intuitive role of each parameter:

a, d    Scaling parameters. Increasing a and d will make the output image appear smaller,
whereas decreasing them will make the output pixels appear larger.
b, c    Rotation/skew parameters. If b and c are zero, the output image will be a rectangular
scaling of the input image. If a and d are both zero, b is one, and c is negative one, the
image will appear rotated. The magnitude of b and c will affect scaling as well if a and d
are zero. If more than two of (a,b,c,d) are nonzero, the effect is complicated. The image
may appear skewed and scaled.
tx, ty  Translation parameters. Used to specify the offset between input and output coordinate
systems.
width, height   These specify the output image dimensions of the selected band(s). Note that
increasing the output image height and width over the input image size will not by itself
cause magnification * if a and d are one (1) and b and c are zero (0), the output image
will have the same appearance as the input, except that the borders will shrink or
expand (as determined by width and height) and new areas of the image will be filled
with constant.

The region to be cropped in the input image is implicitly defined by the dimensions of the output
image and the mapping from output to input coordinates. Depending on the size of the input and
output images, the amount of scaling specified, and the amount of translation in the mapping, pixels
in the output image may map off the edge of the input image and the constant value is used.

Trichromatic image bands can be operated individually, all together, or in any combination, using
band_mask. Since applying the same (a,b,c,d,tx,ty) mapping to inputs with diverse sizes will specify
different transformations, operating on all bands in unison (band_mask of 1112) is most appropriate
if the dimensions of all bands are equal.

Often a given output pixel location (x,y) will not correspond exactly to a single pixel in the input
image. The sample_tech technique is used to determine how the input data will be interpolated to
produce each output pixel value. One of the following standard geometry technique values can be
assigned to sample_tech:

xieValGeomDefault
xieValGeomAntialias
xieValGeomAntialiasByArea
xieValGeomAntialiasByLPF
xieValGeomBilinearInterp
xieValGeomGaussian
xieValGeomNearestNeighbor

If a vendor defined additional private geometry techniques, the private technique values given to these
techniques can be assigned to sample_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined  or a private technique.
Output Attributes
Class   same as src
Type    same as src
Width   width
Height  height
Levels  same as src
Structures
XieFloGeometry sets the XiePhotoElement structure field elemType to
xieElemGeometry, which identifies the element as a Geometry, and sets the fields of the member
structure Geometry using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef float XieConstant[3];
typedef unsigned XieGeometryTechnique;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        unsigned int width;
                        unsigned int height;
                        float coefficients[6];
                        XieConstant constant;
                        unsigned int band_mask;
                        XieGeometryTechnique sample_tech;
                        XiePointer sample_param;
                } Geometry;
                ...
        } data;
} XiePhotoElement;

/* Definitions for GeometryTechniques */
#define xieValGeomDefault       0
#define xieValGeomAntialias     2
#define xieValGeomAntialiasByArea       4
#define xieValGeomAntialiasByLPF        6
#define xieValGeomBilinearInterp        8
#define xieValGeomGaussian      10
#define xieValGeomNearestNeighbor       12
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid sample_tech or sample_param
xieErrNoFloValue        Invalid coefficients
See Also
XieTecGeomAntialiasByArea, XieTecGeomAntialiasByLowpass, XieTecGeomGaussian,
XieTecGeomNearestNeighbor
 XIElib - Photoflo Element Functions    XieFloLogical
Name
XieFloLogical - specify a Logical element and set its parameters
Syntax
void XieFloLogical (element, src1, src2, domain, constant, operator,
band_mask)
XiePhotoElement *element;
XiePhototag src1;
XiePhototag src2;
XieProcessDomain *domain;
XieConstant constant;
unsigned long operator;
unsigned int band_mask;
Arguments
element Specifies the XiePhotoElement structure to use.
src1    Specifies the first data source.
src2    Specifies the second data source.
domain  Specifies the subset of source data that will be operated on.
constant        Specifies the constant data source.
operator        Specifies the logical operator to be used.
band_mask       Specifies which bands are to be operated on.
Description
A Logical element performs per-pixel bitwise operations on a single data source, or between two data
sources, or between a single data source and a constant.

When two sources are involved, src1 and src2 are the phototags of the elements supplying source
data; constant is ignored. A phototag is the position or index of an element within an array of
elements used to specify a photoflo; the first element in the array has a phototag value of one (1). If
the operation is to involve a constant, src1 is one operand, src2 must be zero, and constant is
used as the other operand.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. If the entire source data is to be operated on, a pointer to an XieProcessDomain
structure must still be provided, with the phototag field set to zero (0); the offset_x and
offset_y fields are ignored.

The value of operator matches the GC-function values defined by the core protocol specification
for CreateGC. The output of a Logical element is determined by the number of data sources and
operator:

GC function
monadic operation
dyadic operation
Clear
0
0
And
constant AND src1
src2 AND src1
AndReverse
constant AND (NOT src1)
src2 AND (NOT src1)
Copy
constant
src2
AndInverted
(NOT constant) AND src1
(NOT src2) AND src1
NoOp
src1
src1
Xor
constant XOR src1
src2 XOR src1
Or
constant OR src1
src2 OR src1
Nor
(NOT constant) AND (NOT src1)
(NOT src2) AND (NOT src1)
Equiv
(NOT constant) XOR src1
(NOT src2) XOR src1
Invert
NOT src1
NOT src1
OrReverse
constant OR (NOT src1)
src2 OR (NOT src1)
CopyInverted
NOT constant
NOT src2
OrInverted
(NOT constant) OR src1
(NOT src2) OR src1
Nand
(NOT constant) OR (NOT src1)
(NOT src2) OR (NOT src1)
Set
1
1

Only bands selected by the band_mask are subject to processing. Other bands present in the image
are passed through to the output. For example, a band_mask of 0012 indicates that only the least
significant band would be processed; operating on all bands requires a band_mask of 1112.
Output Attributes
Class   same as src1
Type    constrained
Width   same as src1
Height  same as src1
Levels  same as src1
Structures
XieFloLogical sets the XiePhotoElement structure field elemType to
xieElemLogical, which identifies the element as a Logical, and sets the fields of the member
structure Logical using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef float XieConstant[3];
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src1;
                        XiePhototag src2;
                        XieProcessDomain domain;
                        XieConstant constant;
                        int operator;
                        unsigned int band_mask;
                } Logical;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Class or levels differ between src1 and src2, or
levels is not a power of 2, or
src1 or src2 in not constrained
xieErrNoFloOperator     Invalid operator
xieErrNoFloSource       Invalid src1 or src2
 XIElib - Photoflo Element Functions    XieFloMatchHistogram
Name
XieFloMatchHistogram - specify a MatchHistogram element and set its parameters
Syntax
void XieFloMatchHistogram (element, src, domain, shape, shape_param)
XiePhotoElement *element;
XiePhototag src;
XieProcessDomain *domain;
XieHistogramShape shape;
XiePointer shape_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
domain  Specifies the subset of source data that will be operated on.
shape   Specifies the form of the desired output data histogram.
shape_param     Specifies the list of additional parameters required by shape.
Description
A MatchHistogram element produces output data that differ from the source data in terms of its pixel
value distribution, or histogram. It allows the client to specify the desired shape of the resulting data's
histogram (algorithmic description of resulting histogram shape).

The source data must be constrained and single band, and it must have three or more levels.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. Only data that intersects with the subset specified by domain is included in the histogram,
and only that data will be affected in the result of the histogram matching operation: all other data
will pass through unchanged. If the entire source data is to be operated on, a pointer to an
XieProcessDomain structure must still be provided, with the phototag field set to zero (0); the
offset_x and offset_y fields are ignored.

HistogramShape defines the various match-histogram shape techniques that can be requested by a
MatchHistogram element. One of the following standard  match-histogram shape technique values
can be assigned to shape:

xieValHistogramFlat
xieValHistogramGaussian
xieValHistogramHyperbolic

If a vendor defined additional private match-histogram shape techniques, the private technique values
given to these techniques can be assigned to shape.
Output Attributes
Class   single band
Type    constrained
Width   same as src
Height  same as src
Levels  same as src
Structures
XieFloMatchHistogram sets the XiePhotoElement structure field elemType to
xieElemMatchHistogram, which identifies the element as a MatchHistogram, and sets the fields
of the member structure MatchHistogram using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef unsigned XieHistogramShape;
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieProcessDomain domain;
                        XieHistogramShape shape;
                        XiePointer shape_param;
                } MatchHistogram;
                ...
        } data;
} XiePhotoElement;

/* Definitions for GeometryTechniques */
#define xieValGeomDefault       0
#define xieValGeomAntialias     2
#define xieValGeomAntialiasByArea       4
#define xieValGeomAntialiasByLPF        6
#define xieValGeomBilinearInterp        8
#define xieValGeomGaussian      10
#define xieValGeomNearestNeighbor       12
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Invalid src data: unconstrained, triple band, or bitonal
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid shape or shape_param
See Also
XieTecHistogramGaussian, XieTecHistogramHyperbolic
 XIElib - Photoflo Element Functions    XieFloMath
Name
XieFloMath - specify a Math element and set its parameters
Syntax
void XieFloMath (element, src, domain, operator, band_mask)
XiePhotoElement *element;
XiePhototag src;
XieProcessDomain *domain;
XieMathOp operator;
unsigned int band_mask;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
domain  Specifies the subset of source data that will be operated on.
operator        Specifies the mathematical operation to be applied.
band_mask       Specifies which bands are to be operated on.
Description
A Math element applies a single operand mathematical operation to the source data on a point-wise
basis.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. If the entire source data is to be operated on, a pointer to an XieProcessDomain
structure must still be provided, with the phototag field set to zero (0); the offset_x and
offset_y fields are ignored.

Pixel computations that would lead to errors will yield valid server-dependent values (for example,
the log of a constrained pixel value of zero might result in a value of zero). Only bands selected by the
band_mask are subject to processing. Other bands present in the image are passed through to the
output. For example, a band_mask of 0012 indicates that only the least significant band would be
processed; operating on all bands requires a band_mask of 1112. Using band_mask to select
source data that have two (2) or less levels is not permitted.

The following valid mathematical operations that can be invoked through the Math element:

Operator
Meaning
xieValExp
exponential
xieValLn
natural logarithm
xieValLog2
logarithm base 2
xieValLog10
logarithm base 10
xieValSquare
square
xieValSqrt
square root

All output data attributes are inherited from the source data.
Output Attributes
Class   same as src
Type    same as src
Width   same as src
Height  same as src
Levels  same as src
Structures
XieFloMath sets the XiePhotoElement structure field elemType to xieElemMath, which
identifies the element as a Math, and sets the fields of the member structure Math using the
arguments in the argument list.

typedef unsigned XiePhototag;
typedef unsigned XieMathOp;
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieProcessDomain domain;
                        XieMathOp operator;
                        unsigned int band_mask;
                } Math;
                ...
        } data;
} XiePhotoElement;

/* Definitions of Math Operators */
#define xieValExp       1
#define xieValLn        2
#define xieValLog2      3
#define xieValLog10     4
#define xieValSquare    5
#define xieValSqrt      6
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Selected source data are bitonal
xieErrNoFloSource       Invalid src
xieErrNoFloOperator     Invalid operator
 XIElib - Photoflo Element Functions    XieFloPasteUp
Name
XieFloPasteUp - specify a PasteUp element and set its parameters
Syntax
void XieFloPasteUp (element, width, height, constant, tiles,
tile_count)
XiePhotoElement *element;
unsigned int width;
unsigned int height;
XieConstant constant;
XieTile *tiles
unsigned int tile_count;
Arguments
element Specifies the XiePhotoElement structure to use.
width   Specifies the full horizontal extent of the output data.
height  Specifies the full vertical extent of the output data.
constant        Specifies the fill value for output regions that do not intersect the
regions defined in tiles.
tiles   Specifies a list of tile descriptors.
tile_count      Specifies the number of tile descriptors in tiles.
Description
A PasteUp element is an N-input translate operation that outputs data constructed from various source
data tiles or a constant value.

Each of the tiles specifies a src (the phototag of the element supplying source data), and the
coordinates, dst_x and dst_y, where the tile belongs in the output data. A phototag is the position
or index of an element within an array of elements used to specify a photoflo; the first element in the
array has a phototag value of one (1).

Each region of the output data is defined by a tile's destination coordinates, dst_x and dst_y, and
its src dimensions. For output regions where no tile provides input, the value of constant is used.
If tiles overlap, a stacking-order rule defines which pixel value will be output: the last tile involved in
the overlap in the list of tiles will provide the output pixel.

At least one tile must be supplied.  Except for width and height, all attributes of each source tile
must match. In addition, for triple band input, inter-band dimensions within each tiles must
match.
Output Attributes
Class   same as tiles
Type    same as tiles
Width   width
Height  height
Levels  same as tiles
Structures
XieFloPasteUp sets the XiePhotoElement structure field elemType to
xieElemPasteUp, which identifies the element as a PasteUp, and sets the fields of the member
structure PasteUp using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef float XieConstant[3];
typedef struct {
        XiePhototag src;
        int dst_x;
        int dst_y;
} XieTile;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        unsigned int width;
                        unsigned int height;
                        XieConstant constant;
                        XieTile *tiles;
                        unsigned int tile_count;
                } PasteUp;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        Incompatible attributes between tiles or
unequal inter-band dimensions within a tile
xieErrNoFloSource       Invalid source tiles or
no tiles were specified
See Also
XieFreePasteUpTiles
 XIElib - Photoflo Element Functions    XieFloPoint
Name
XieFloPoint - specify a Point element and set its parameters
Syntax
void XieFloPoint (element, src, domain, lut, band_mask)
XiePhotoElement *element;
XiePhototag src;
XieProcessDomain *domain;
XieLut lut;
unsigned int band_mask;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
domain  Specifies the subset of source data that will be operated on.
lut     Specifies the LUT resource supplying the lookup table.
band_mask       Specifies which bands are to be operated on.
Description
A Point element maps source pixel values to output pixel values using a lookup table (LUT).

src is the phototag of the element supplying constrained source data. A phototag is the position or
index of an element within an array of elements used to specify a photoflo; the first element in the
array has a phototag value of one (1). Lut is the phototag of the ImportClientLUT or ImportLUT
element supplying the lookup table data.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. If the entire source data is to be operated on, a pointer to an XieProcessDomain
structure must still be provided, with the phototag field set to zero (0); the offset_x and
offset_y fields are ignored.

band_mask specifies which bands are to be operated on (all bands must be specified if lut is single
band and src is triple band). For example, a band_mask of 0012 indicates that only the least
significant band would be processed; operating on all bands requires a band_mask of 1112.

The output is constrained, with the width and height taken from src and class and levels taken from
lut. When src is single band and lut is triple band, for the bands that are indicated by
band_mask, the output bands are remapped through their respective lut bands, whereas the other
bands are just replications of the single src band. If domain is used, the class and levels of lut
must match those of src.

Each lut array must contain sufficient entries so that all potential pixel values found in src can
form a valid index into the array. Generally each src pixel value is used directly as an index into a
lut array. When triple band src data are remapped through a single band lut, however, pixel
values from all three src bands are combined to form an array index; for this case, width and height
must match for all bands.

When a single band lut is used to remap triple band src data, the following presents the algorithm
for computing combined array indices:

LUT band order
LUT indexing algorithm for combining pixel values
LSFirst
index = value[0] + value[1] x levels[0] + value[2] x levels[0] x levels[1]
MSFirst
index = value[2] + value[1] x levels[2] + value[0] x levels[2] x levels[1]
Output Attributes
Class   same as lut
Type    constrained
Width   same as src
Height  same as src
Levels  same as lut
Structures
XieFloPoint sets the XiePhotoElement structure field elemType to xieElemPoint,
which identifies the element as a Point, and sets the fields of the member structure Point using the
arguments in the argument list.

typedef XID XieLut;
typedef unsigned XiePhototag;
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieProcessDomain domain;
                        XieLut lut;
                        unsigned int band_mask;
                } Point;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Unconstrained src data, or
lut does not contain enough entries, or
lut is single band and src is triple band, but band_mask is
incomplete, or
domain is being used, but lut class or levels do not match those of
src
xieErrNoFloSource       Invalid src or lut
See Also
XieFloImportLUT, XieFloImportClientLUT
 XIElib - Photoflo Element Functions    XieFloUnconstrain
Name
XieFloUnconstrain - specify an unconstrain element and set its parameters
Syntax
void XieFloUnconstrain (element, src)
XiePhotoElement *element;
XiePhototag src;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying constrained source data.
Description
An Unconstrain element produces unconstrained output data from constrained input data.
Output Attributes
Class   same as src
Type    unconstrained
Width   same as src
Height  same as src
Levels  unknown
Structures
XieFloUnconstrain sets the XiePhotoElement structure field elemType to
xieElemUnconstrain, which identifies the element as an Unconstrain, and sets the fields of the
member structure Unconstrain using the arguments in the argument list.

typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                } Unconstrain;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        Unconstrained src data
xieErrNoFloSource       Invalid src
See Also
XieFloConstrain
 XIElib - Photoflo Element Functions    XieFloExportClientHistogram
Name
XieFloExportClientHistogram - specify an ExportClientHistogram element and set its parameters
Syntax
void XieFloExportClientHistogram (element, src, domain, notify)
XiePhotoElement *element;
XiePhototag src;
XieProcessDomain *domain;
XieExportNotify notify;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying single band constrained source data.
domain  Specifies the subset of the source data from which the distribution will
be generated.
notify  Specifies whether to enable sending an ExportAvailable event.
Description
An ExportClientHistogram element generates a histogram of the pixel values found in the source
data. It prepares histogram data that can be retrieved by the client using XieGetClientData. An
event can be requested that will notify the client when histogram data becomes available.

The data generated for the client is a list of XieHistogramData where each entry consists of a
value (that is, a pixel value) followed by the count of pixels found with that value. If the number of
pixels for a given value exceeds the capacity of count, that count will be returned at the maximum
value (that is, 232 - 1). Pixel values that are not found in the data are not included in the histogram
data: no entries are returned where count is zero.

In order to specify a subset of source data that will be operated on, the phototag, offset_x, and
offset_y fields of the XieProcessDomain structure pointed to by domain must be supplied;
XIElib does not provide a convenience function to create and/or fill in an XieProcessDomain
structure. Only data that intersects with the subset specified by domain is included in the histogram.
If the entire source data is to be operated on, a pointer to an XieProcessDomain structure must
still be provided, with the phototag field set to zero (0); the offset_x and offset_y fields are
ignored.

One of three standard export notify values can be assigned to notify:

xieValDisable
xieValFirstData
xieValNewData

If notify was specified as xieValFirstData, this event will be sent only the first time data
become available; otherwise, if xieValNewData was specified, this event will be generated each
time the amount of data available changes from zero to nonzero.
Structures
XieFloExportClientHistogram sets the XiePhotoElement structure field elemType to
xieElemExportClientHistogram, which identifies the element as an ExportClientHistogram,
and sets the fields of the member structure ExportClientHistogram using the arguments in the
argument list.

typedef unsigned XieExportNotify;
typedef unsigned XiePhototag;
typedef struct {
         int offset_x;
         int offset_y;
         XiePhototag phototag;
} XieProcessDomain;
typedef struct {
        unsigned long value;
        unsigned long count;
} XieHistogramData;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieProcessDomain domain;
                        XieExportNotify notify;
                } ExportClientHistogram;
                ...
        } data;
} XiePhotoElement;

/* Definitions of ExportNotify */
#define xieValDisable   1
#define xieValFirstData 2
#define xieValNewData   3
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDomain       Invalid domain
xieErrNoFloMatch        Unconstrained src data or
triple band src data
xieErrNoFloSource       Invalid src
xieErrNoFloValue        Invalid notify
See Also
XieGetClientData
 XIElib - Photoflo Element Functions    XieFloExportClientLUT
Name
XieFloExportClientLUT - specify an ExportClientLUT element and set its parameters
Syntax
void XieFloExportClientLUT (element, src, band_order, notify, start,
length)
XiePhotoElement *element;
XiePhototag src;
XieOrientation band_order;
XieExportNotify notify;
XieLTriplet start;
XieLTriplet length;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying lookup table data.
band_order      Specifies the order of triple band arrays.
notify  Specifies whether to enable sending an ExportAvailable event.
start   Specifies the index of the first array entry that should be returned.
length  Specifies the number of array entries that should be returned.
Description
An ExportClientLUT element allows data imported from an ImportLUT or an ImportClientLUT
element to be retrieved by the client. The actual transport of lookup table data through the protocol
stream is requested using XieGetClientData.

One of three standard export notify values can be assigned to notify:

xieValDisable
xieValFirstData
xieValNewData

If notify was specified as xieValFirstData, this event will be sent only the first time data
become available; otherwise, if xieValNewData was specified, this event will be generated each
time the amount of data available changes from zero to nonzero.

band_order is the order in which triple band arrays are transmitted through the protocol stream.
One of the following standard orientation values can be assigned to band_order:

xieValLSFirst
xieValMSFirst

The least significant band of trichromatic data is the first band mentioned in the common name of the
colorspace: for example, red is the least significant band of RGB data. For band-by-plane data,
band_order specifies whether this band corresponds with the least significant or most significant
LUT array. Each array is transported as a separate data stream:

band
LSFirst
MSFirst
0
R7R6R5R4R3R2R1R0
B7B6B5B4B3B2B1B0
1
G7G6G5G4G3G2G1G0
G7G6G5G4G3G2G1G0
2
B7B6B5B4B3B2B1B0
R7R6R5R4R3R2R1R0

The size of each array entry is either 1, 2, or 4 bytes: the smallest size into which the output
quantization levels can be stored. When array entries require multiple bytes, the byte order per entry
is determined in the same manner as other numeric data: it is the byte orientation established at core
X connection setup time.
Structures
XieFloExportClientLUT sets the XiePhotoElement structure field elemType to
xieElemExportClientLUT, which identifies the element as an ExportClientLUT, and sets the
fields of the member structure ExportClientLUT using the arguments in the argument list.

typedef unsigned XieExportNotify;
typedef unsigned XieOrientation;
typedef unsigned long XieLTriplet[3];
typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieOrientation band_order;
                        XieExportNotify notify;
                        XieLTriplet start;
                        XieLTriplet length;
                } ExportClientLUT;
                ...
        } data;
} XiePhotoElement;

/* Definitions of ExportNotify */
#define xieValDisable   1
#define xieValFirstData 2
#define xieValNewData   3

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        start + length exceeds number of entries in an array
xieErrNoFloSource       Invalid src
xieErrNoFloValue        Invalid notify or band_order
See Also
 XieFloImportLUT, XieFloImportClientLUT, XieGetClientData
 XIElib - Photoflo Element Functions    XieFloExportClientPhoto
Name
XieFloExportClientPhoto - specify an ExportClientPhoto element and set its parameters
Syntax
void XieFloExportClientPhoto (element, src, notify, encode_tech,
encode_param)
XiePhotoElement *element;
XiePhototag src;
XieExportNotify notify;
XieEncodeTechnique encode_tech;
XiePointer encode_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying constrained data.
notify  Specifies whether to enable sending an ExportAvailable event.
encode_tech     Specifies the technique to compress or format the exported data.
encode_param    Specifies the list of additional parameters required by encode_tech.
Description
An ExportClientPhoto element makes image data available to the protocol stream. The attributes of
the exported data are determined by the attributes of the source data. The format of the data is
specified by the encode_tech technique and encode_param. The actual transport of image data
through the protocol stream is requested using XieGetClientData.

One of three standard export notify values can be assigned to notify:

xieValDisable
xieValFirstData
xieValNewData

If notify was specified as xieValFirstData, this event will be sent only the first time data
become available; otherwise, if xieValNewData was specified, this event will be generated each
time the amount of data available changes from zero to nonzero.

Encode techniques define the techniques that can be used to compress an image or format it as
uncompressed data. One of the following standard encode technique values can be assigned to
encode_tech:

xieValEncodeServerChoice
xieValEncodeUncompressedSingle
xieValEncodeUncompressedTriple
xieValEncodeG31D
xieValEncodeG32D
xieValEncodeG42D
xieValEncodeJPEGBaseline
xieValEncodeJPEGLossless
xieValEncodeTIFF2
xieValEncodeTIFFPackBits

If a vendor defined additional private encode techniques, the private technique values given to these
techniques can be assigned to encode_tech.
Structures
XieFloExportClientPhoto sets the XiePhotoElement structure field elemType to
xieElemExportClientPhoto, which identifies the element as an ExportClientPhoto, and sets
the fields of the member structure ExportClientPhoto using the arguments in the argument list.

typedef unsigned XieExportNotify;
typedef unsigned XiePhototag;
typedef unsigned XieEncodeTechnique;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieExportNotify notify;
                        XieEncodeTechnique encode_tech;
                        XiePointer encode_param;
                } ExportClientPhoto;
                ...
        } data;
} XiePhotoElement;

/* Definitions of ExportNotify */
#define xieValDisable   1
#define xieValFirstData 2
#define xieValNewData   3

/* Definitions for EncodeTechniques */
#define xieValEncodeServerChoice        1
#define xieValEncodeUncompressedSingle  2
#define xieValEncodeUncompressedTriple  3
#define xieValEncodeG31D        4
#define xieValEncodeG32D        6
#define xieValEncodeG42D        8
#define xieValEncodeJPEGBaseline        10
#define xieValEncodeJPEGLossless        12
#define xieValEncodeTIFF2       14
#define xieValEncodeTIFFPackBits        16
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloMatch        Unconstrained src data
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid encode_tech or encode_param
xieErrNoFloValue        Invalid notify
See Also
XieGetClientData, XieFloExportClientPhoto,
XieTecEncodeUncompressedSingle, XieTecEncodeUncompressedTriple, XieTecEncodeG31D,
XieTecEncodeG32D, XieTecEncodeG42D, XieTecEncodeServerChoice,
XieTecEncodeJPEGBaseline, XieTecEncodeJPEGLossless, XieTecEncodeTIFF2,
XieTecEncodeTIFFPackBits
 XIElib - Photoflo Element Functions    XieFloExportClientROI
Name
XieFloExportClientROI - specify an ExportClientROI element and set its parameters
Syntax
void XieFloExportClientROI (element, src, notify)
XiePhotoElement *element;
XiePhototag src;
XieExportNotify notify;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying the list-of-rectangles.
notify  Specifies whether to enable sending an ExportAvailable event.
Description
An ExportClientROI element allows a list-of-rectangles, imported using an ImportROI or an
ImportClientROI element, to be retrieved by the client. The actual transport of list-of-rectangles data
through the protocol stream is requested using a GetClientData element.

One of three standard export notify values can be assigned to notify:

xieValDisable
xieValFirstData
xieValNewData

If notify was specified as xieValFirstData, this event will be sent only the first time data
become available; otherwise, if xieValNewData was specified, this event will be generated each
time the amount of data available changes from zero to nonzero.
Structures
XieFloExportClientROI sets the XiePhotoElement structure field elemType to
xieElemExportClientROI, which identifies the element as an ExportClientROI, and sets the
fields of the member structure ExportClientROI using the arguments in the argument list.

typedef unsigned XieExportNotify;
typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieExportNotify notify;
                } ExportClientROI;
                ...
        } data;
} XiePhotoElement;

/* Definitions of ExportNotify */
#define xieValDisable   1
#define xieValFirstData 2
#define xieValNewData   3
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloSource       Invalid src
xieErrNoFloValue        Invalid notify
See Also
XieFloImportROI, XieFloImportClientROI, XieGetClientData
 XIElib - Photoflo Element Functions    XieFloExportDrawable
Name
XieFloExportDrawable - specify an ExportDrawable element and set its parameters
Syntax
void XieFloExportDrawable (element, src, drawable, gc, dst_x, dst_y)
XiePhotoElement *element;
XiePhototag src;
Drawable drawable;
GC gc;
int dst_x;
int dst_y;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying constrained source data.
drawable        Specifies the Window or Pixmap into which the data will be written.
gc      Specifies the GContext to be used when transferring pixels to
drawable.
dst_x   Specifies where the data should be placed in drawable.
dst_y   Specifies where the data should be placed in drawable.
Description
An ExportDrawable element allows Colormap index data to be exported to a Window or Pixmap.

The following components are used from gc: function, plane-mask, subwindow-mode, clip-x-origin,
clip-y-origin, and clip-mask.

The levels of src must exactly match the depth of drawable and gc  (that is, levels must be
2depth).
Structures
XieFloExportDrawable sets the XiePhotoElement structure field elemType to
xieElemExportDrawable, which identifies the element as an ExportDrawable, and sets the
fields of the member structure ExportDrawable using the arguments in the argument list.

typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        Drawable drawable;
                        GC gc;
                        int dst_x;
                        int dst_y;
                } ExportDrawable;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDrawable     Invalid drawable
xieErrNoFloGC   Invalid gc
xieErrNoFloMatch        Invalid src data: triple band, unconstrained, levels does not match
depth
xieErrNoFloSource       Invalid src
See Also
XieFloExportDrawablePlane
 XIElib - Photoflo Element Functions    XieFloExportDrawablePlane
Name
XieFloExportDrawablePlane - specify an ExportDrawablePlane element and set its parameters
Syntax
void XieFloExportDrawablePlane (element, src, drawable, gc, dst_x,
dst_y)
XiePhotoElement *element;
XiePhototag src;
Drawable drawable;
GC gc;
int dst_x;
int dst_y;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying constrained bitonal source data.
drawable        Specifies the Window or Pixmap into which the data will be written.
gc      Specifies the GContext to be used when transferring pixels to
drawable.
dst_x   Specifies where the data should be placed in drawable.
dst_y   Specifies where the data should be placed in drawable.
Description
An ExportDrawablePlane element allows single-band single-bit (bitonal) data to be exported to a
Window or a Pixmap.

The following components are used from gc: function, plane-mask, foreground, background, fill-
style, subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask. For the fill-style component of
gc, values of FillSolid and FillTiled are treated as synonyms for FillOpaqueStippled.
Structures
XieFloExportDrawablePlane sets the XiePhotoElement structure field elemType to
xieElemExportDrawablePlane, which identifies the element as an ExportDrawablePlane, and
sets the fields of the member structure ExportDrawablePlane using the arguments in the
argument list.

typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        Drawable drawable;
                        GC gc;
                        int dst_x;
                        int dst_y;
                } ExportDrawablePlane;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloDrawable     Invalid drawable
xieErrNoFloGC   Invalid gc
xieErrNoFloMatch        Invalid src data: triple band, not constrained, levels > 2
xieErrNoFloSource       Invalid src
See Also
XieFloExportDrawable
 XIElib - Photoflo Element Functions    XieFloExportLUT
Name
XieFloExportLUT - specify an ExportLUT element and set its parameters
Syntax
void XieFloExportLUT (element, src, lut, merge, start)
XiePhotoElement *element;
XiePhototag src;
XieLut lut;
Bool merge;
XieLTriplet start;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying lookup table data.
lut     Specifies the ID of the LUT to receive the data.
merge   Specifies how new array entries replace existing entries.
start   Specifies the index of the first array entry that should be written in
lut, per band.
Description
An ExportLUT element allows data imported from an ImportLUT or ImportClientLUT element to be
saved in an existing LUT resource.

merge specifies that new array entries from src should replace entries that already exist within
lut. If merge is False, start must be zero for each band. In this case, lut will inherit the
attributes of src and be populated with its data; the previous attributes and data of lut are
overwritten when the photoflo completes. If merge is True and lut has existing attributes, the
data from src will replace the data from lut, beginning at position start. If merge is True,but
lut has not yet been populated, it is an error.

The attributes of src must match those of lut, and the combination of start and the length of
src must specify a valid subrange existing within lut.
Structures
XieFloExportLUT sets the XiePhotoElement structure field elemType to
xieElemExportLUT, which identifies the element as an ExportLUT, and sets the fields of the
member structure ExportLUT using the arguments in the argument list.

typedef XID XieLut;
typedef unsigned long XieLTriplet[3];
typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieLut lut;
                        Bool merge;
                        XieLTriplet start;
                } ExportLUT;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloLUT  Invalid lut
xieErrNoFloMatch        merge true and attributes do not match between src and lut, or
merge true and start + src length is not a subrange of lut
xieErrNoFloSource       Invalid src
xieErrNoFloValue        merge false and start nonzero
See Also
XieFloImportLUT, XieFloImportClientLUT
 XIElib - Photoflo Element Functions    XieFloExportPhotomap
Name
XieFloExportPhotomap - specify an ExportPhotomap element and set its parameters
Syntax
void XieFloExportPhotomap (element, src, photomap, encode_tech,
encode_param)
XiePhotoElement *element;
XiePhototag src;
XiePhotomap photomap;
XieEncodeTechnique encode_tech;
XiePointer encode_param;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying source data.
photomap        Specifies the ID of the photomap resource to receive the data.
encode_tech     Specifies the image compression or formatting technique.
encode_param    Specifies the list of additional parameters required by encode_tech.
Description
An ExportPhotomap element allows data from photoflo operations to be saved in a photomap. A
photomap is a server resource that can be used to store image data.

photomap will inherit the attributes of src and be populated with its data. The previous attributes
and data of photomap are overwritten when the photoflo completes.

Encode techniques define the techniques that can be used to compress an image or format it as
uncompressed data. One of the following standard encode technique values can be assigned to
encode_tech:

xieValEncodeServerChoice
xieValEncodeUncompressedSingle
xieValEncodeUncompressedTriple
xieValEncodeG31D
xieValEncodeG32D
xieValEncodeG42D
xieValEncodeJPEGBaseline
xieValEncodeJPEGLossless
xieValEncodeTIFF2
xieValEncodeTIFFPackBits

If a vendor defined additional private encode techniques, the private technique values given to these
techniques can be assigned to encode_tech.
Structures
XieFloExportPhotomap sets the XiePhotoElement structure field elemType to
xieElemExportPhotomap, which identifies the element as an ExportPhotomap, and sets the
fields of the member structure ExportPhotomap using the arguments in the argument list.

typedef unsigned XiePhototag;
typedef XID XiePhotomap;
typedef unsigned XieEncodeTechnique;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XiePhotomap photomap;
                        XieEncodeTechnique encode_tech;
                        XiePointer encode_param;
                } ExportPhotomap;
                ...
        } data;
} XiePhotoElement;

/* Definitions for EncodeTechniques */
#define xieValEncodeServerChoice        1
#define xieValEncodeUncompressedSingle  2
#define xieValEncodeUncompressedTriple  3
#define xieValEncodeG31D        4
#define xieValEncodeG32D        6
#define xieValEncodeG42D        8
#define xieValEncodeJPEGBaseline        10
#define xieValEncodeJPEGLossless        12
#define xieValEncodeTIFF2       14
#define xieValEncodeTIFFPackBits        16
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloPhotomap     Invalid photomap
xieErrNoFloSource       Invalid src
xieErrNoFloTechnique    Invalid encode_tech or encode_param
See Also
XieTecEncodeUncompressedSingle, XieTecEncodeUncompressedTriple, XieTecEncodeG31D,
XieTecEncodeG32D, XieTecEncodeG42D, XieTecEncodeServerChoice,
XieTecEncodeJPEGBaseline, XieTecEncodeTIFF2, XieTecEncodeTIFFPackBits
 XIElib - Photoflo Element Functions    XieFloExportROI
Name
XieFloExportROI - specify an ExportROI element and set its parameters
Syntax
void XieFloExportROI (element, src, roi)
XiePhotoElement *element;
XiePhototag src;
XieRoi roi;
Arguments
element Specifies the XiePhotoElement structure to use.
src     Specifies the element supplying a list-of-rectangles.
roi     Specifies the ID of the ROI resource to receive the data.
Description
An ExportROI element allows data imported from an ImportROI or ImportClientROI element to be
saved in an existing Rectangles-Of-Interest (ROI) resource.

roi will be populated with new data. The previous data of roi are overwritten after the photoflo
completes.
Structures
XieFloExportROI sets the XiePhotoElement structure field elemType to
xieElemExportROI, which identifies the element as an ExportROI, and sets the fields of the
member structure ExportROI using the arguments in the argument list.

typedef XID XieRoi;
typedef unsigned XiePhototag;

typedef struct {
        int elemType;
        union {
                ...
                struct {
                        XiePhototag src;
                        XieRoi roi;
                } ExportROI;
                ...
        } data;
} XiePhotoElement;
Errors
xieErrNoFloAlloc        Insufficient resources (for example, memory)
xieErrNoFloROI  Invalid roi
xieErrNoFloSource       Invalid src
See Also
XieFloImportROI, XieFloImportClientROI
 XIElib - Technique Functions   XieTecColorAllocAll
Name
XieTecColorAllocAll - allocate and fill an XieColorAllocAllParam structure
Syntax
XieColorAllocAllParam *XieTecColorAllocAll (fill)
unsigned long fill;
Arguments
fill    Specifies thefill value to use for pixels which cannot be allocated.
Returns
The XieColorAllocAllParam structure.
Description
XieTecColorAllocAll allocates and returns a pointer to an XieColorAllocAllParam
structure. The returned structure represents the list of parameters required by the AllocAll color
allocation technique and may be used as the color_alloc_param argument of
XieFloConvertToIndex (when the color_alloc_tech argument is
xieValColorAllocAll).

If insufficient memory is available, XieTecColorAllocAll returns NULL. To free the memory
allocated to this structure, use XFree.

The AllocAll color allocation technique allocates a read-only Colormap cell for each new pixel found.
If the Colormap runs out of cells, the remaining new pixels are mapped to fill. A ColorAlloc
event, which warns the client that results are of lesser fidelity than desired, will be sent if it is
necessary to use fill, and the client has requested it (see XieFloConvertToIndex). AllocAll is
appropriate only for dynamic Colormaps and requires that the number of discrete image pixels fit
within the size of the Colormap to avoid running out of cells.
Structures
XieTecColorAllocAll sets the structure field fill to the value of the argument fill.

typedef struct {
        unsigned long fill;
} XieColorAllocAllParam;
See Also
XieFloConvertToIndex
 XIElib - Technique Functions   XieTecColorAllocMatch
Name
XieTecColorAllocMatch - allocate and fill an XieColorAllocMatchParam structure
Syntax
XieColorAllocMatchParam *XieTecColorAllocMatch (match_limit,
gray_limit)
double match_limit;
double gray_limit;
Arguments
match_limit     Specifies the color allocation control value.
gray_limit      Specifies the gray scale allocation control value.
Returns
The XieColorAllocMatchParam structure.
Description
XieTecColorAllocMatch allocates and returns a pointer to an
XieColorAllocMatchParam structure. The returned structure represents the list of parameters
required by the AllocMatch color allocation technique and may be used as the
color_alloc_param argument of XieFloConvertToIndex (when the
color_alloc_tech argument is xieValColorAllocMatch).

If insufficient memory is available, XieTecColorAllocMatch returns NULL. To free the
memory allocated to this structure, use XFree.

The AllocMatch color allocation technique allows a trade-off between image fidelity and Colormap
usage via a pair of granularity parameters. The highest priority is given to allocating read-only cells
in a sequence that provides an even distribution of pixels throughout the colorspace. Secondary
priority is given to the frequency of usage of image pixels. Any image pixel that is a close enough
match to an existing read-only cell will share that cell (where close is determined by the granularity
controls). For other image pixels, new read-only allocations are made. When no more cells are
available, each remaining image pixel is matched to the closest read-only cell. The AllocMatch color
allocation technique is appropriate for both static and dynamic Colormaps. For the sake of
computational efficiency the number of discrete image pixels should not exceed the size of the
Colormap.

match_limit and gray_match control the allocation of colors and gray shades, respectively. The
minimum value (0.0) specifies exact matches (within the limits of the Colormap). The maximum
value (1.0) encompasses the entire colorspace within which no new cells are allocated. A
ColorAlloc event, which warns the client that results are of lesser fidelity than desired, can be
sent if the Colormap runs out of cells.
Structures
XieTecColorAllocMatch sets the structure field match_limit to the value of the argument
match_limit; and the structure field gray_limit to the value of the argument gray_limit.

typedef struct {
        float match_limit;
        float gray_limit;
} XieColorAllocMatchParam;
See Also
XieFloConvertToIndex
 XIElib - Technique Functions   XieTecColorAllocRequantize
Name
XieTecColorAllocRequantize - allocate and fill an XieColorAllocRequantizeParam structure
Syntax
XieColorAllocRequantizeParam *XieTecColorAllocRequantize (max_cells)
unsigned long max_cells;
Arguments
max_cells       Specifies the maximum number of Colormap allocations to allow.
Returns
The XieColorAllocRequantizeParam structure.
Description
XieTecColorAllocRequantize allocates and returns a pointer to an
XieColorAllocRequantizeParam structure. The returned structure represents the list of
parameters required by the AllocRequantize color allocation technique and may be used as the
color_alloc_param argument of XieFloConvertToIndex (when the
color_alloc_tech argument is xieValColorAllocRequantize).

If insufficient memory is available, XieTecColorAllocRequantize returns NULL. To free the
memory allocated to this structure, use XFree.

The AllocRequantize color allocation technique first reduces the total number of discrete pixel values
in the image to be no more than a specified number and then allocates the resulting pixel values as
read-only cells from the Colormap. One method of accomplishing this reduction process can be found
in "Color image quantization for frame buffer display" (Heckbert, P. S., Comput. Graph. 16, 3).

If max_cells is zero or greater than the number of unallocated Colormap cells, the reduction
algorithm will restrict its output to the number of free cells. A ColorAlloc event, which warns the
client that results are of lesser fidelity than desired, can be sent if the number of pixels had to be
restricted to a lesser number than max_cells because of  a lack of free Colormap cells. The
AllocRequantize color allocation technique is appropriate only for dynamic Colormaps.
Structures
XieTecColorAllocRequantize sets the structure field max_cells to the value of the
argument max_cells.

typedef struct {
        unsigned long max_cells;
} XieColorAllocRequantizeParam;
See Also
XieFloConvertToIndex
 XIElib - Technique Functions   XieTecRGBToCIELab
Name
XieTecRGBToCIELab - allocate and fill an XieRGBToCIELabParam structure
Syntax
XieRGBToCIELabParam *XieTecRGBToCIELab (matrix, white_adjust_tech,
white_adjust_param)
XieMatrix matrix;
XieWhiteAdjustTechnique white_adjust_tech;
XiePointer white_adjust_param;
Arguments
matrix  Specifies the conversion matrix.
white_adjust_tech       Specifies the WhiteAdjust technique to be used.
white_adjust_param      Specifies the list of parameters required by white_adjust_tech.
Returns
The XieRGBToCIELabParam structure.
Description
XieTecRGBToCIELab allocates and returns a pointer to an XieRGBToCIELabParam structure.
The returned structure represents the list of parameters required by the RGBToCIELab color
conversion technique and may be used as the color_param argument of
XieFloConvertFromRGB (when the color_space argument is xieValRGBToCIELab).

If insufficient memory is available, XieTecRGBToCIELab returns NULL. To free the memory
allocated to this structure, use XFree.

XieTecRGBToCIELab converts RGB data to the CIELab colorspace, an international standard
designed for perceptual uniformity. The colorspace coordinates are denoted by L, a, and b and are
defined in CIE, Recommendations on Uniform Color Spaces, Color-Difference Equations,
Psychometric Color Terms (Bureau Central de la CIE [Supplement 2 of CIE Publication 15 (E-1.3.1)
1971], 1978).

matrix is a 3x3 RGB-to-CIEXYZ conversion matrix (the source white point is also encoded in
matrix). white_adjust_tech is the WhiteAdjust technique that can be used to shift the white
point of the output data. white_adjust_param is the list of parameters required by
white_adjust_tech.

The input data type can be constrained or unconstrained; the output data type is always
unconstrained. When the input is constrained, the data are normalized to the range [0, 1] (that is,
scaled by 1/(levels - 1) prior to the conversion).

WhiteAdjust techniques define the white point adjustment techniques that can be used when
converting to or from the RGB colorspace. One of the following standard WhiteAdjust technique
values can be assigned to white_adjust_tech:

xieValWhiteAdjustDefault
xieValWhiteAdjustNone
xieValWhiteAdjustCIELabShift

If a vendor defined additional private WhiteAdjust techniques, the private technique values given to
these techniques can be assigned to white_adjust_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined or a private technique.
Structures
XieTecRGBToCIELab sets the structure field matrix to the values of the argument matrix; the
structure field white_adjust_tech to the value of the argument white_adjust_tech; and
the structure field white_adjust_param to the value of the argument white_adjust_param.

typedef float XieMatrix[9];
typedef unsigned XieWhiteAdjustTechnique;
typedef struct {
        XieMatrix matrix;
        XieWhiteAdjustTechnique white_adjust_tech;
        XiePointer white_adjust_param;
} XieRGBToCIELabParam;

/* Definitions for WhiteAdjust Techniques */
#define xieValWhiteAdjustDefault        0
#define xieValWhiteAdjustNone   1
#define xieValWhiteAdjustCIELabShift    2
See Also
XieFloConvertFromRGB, XieTecWhiteAdjustCIELabShift
 XIElib - Technique Functions   XieTecRGBToCIEXYZ
Name
XieTecRGBToCIEXYZ - allocate and fill an XieRGBToCIEXYZParam structure
Syntax
XieRGBToCIEXYZParam *XieTecRGBToCIEXYZ (matrix, white_adjust_tech,
white_adjust_param)
XieMatrix matrix;
XieWhiteAdjustTechnique white_adjust_tech;
XiePointer white_adjust_param;
Arguments
matrix  Specifies the conversion matrix.
white_adjust_tech       Specifies the WhiteAdjust technique to be used.
white_adjust_param      Specifies the list of parameters required by white_adjust_tech.
Returns
The XieRGBToCIEXYZParam structure.
Description
XieTecRGBToCIEXYZ allocates and returns a pointer to an XieRGBToCIEXYZParam structure.
The returned structure represents the list of parameters required by the RGBToCIEXYZ color
conversion technique and may be used as the color_param argument of
XieFloConvertFromRGB (when the color_space argument is xieValRGBToCIEXYZ).

If insufficient memory is available, XieTecRGBToCIEXYZ returns NULL. To free the memory
allocated to this structure, use XFree.

XieTecRGBToCIEXYZ converts RGB data to the CIEXYZ colorspace, an international standard
device-independent colorspace.

matrix is a 3x3 RGB-to-CIEXYZ conversion matrix (the source white point is also encoded in
matrix). white_adjust_tech is the WhiteAdjust technique that can be used to shift the white
point of the output data. white_adjust_param is the list of parameters required by
white_adjust_tech.

The input data type can be constrained or unconstrained; the output data type is always
unconstrained. When the input is constrained, the data are normalized to the range [0, 1] (that is,
scaled by 1/(levels - 1) prior to the conversion).

WhiteAdjust techniques define the white point adjustment techniques that can be used when
converting to or from the RGB colorspace. One of the following standard WhiteAdjust technique
values can be assigned to white_adjust_tech:

xieValWhiteAdjustDefault
xieValWhiteAdjustNone
xieValWhiteAdjustCIELabShift

If a vendor defined additional private WhiteAdjust techniques, the private technique values given to
these techniques can be assigned to white_adjust_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined  or a private technique.
Structures
XieTecRGBToCIEXYZ sets the structure field matrix to the values of the argument matrix; the
structure field white_adjust_tech to the value of the argument white_adjust_tech; and
the structure field white_adjust_param to the value of the argument white_adjust_param.

typedef float XieMatrix[9];
typedef unsigned XieWhiteAdjustTechnique;
typedef struct {
        XieMatrix matrix;
        XieWhiteAdjustTechnique white_adjust_tech;
        XiePointer white_adjust_param;
} XieRGBToCIEXYZParam;

/* Definitions for WhiteAdjust Techniques */
#define xieValWhiteAdjustDefault        0
#define xieValWhiteAdjustNone   1
#define xieValWhiteAdjustCIELabShift    2
See Also
XieFloConvertFromRGB, XieTecWhiteAdjustCIELabShift
 XIElib - Technique Functions   XieTecRGBToYCbCr
Name
XieTecRGBToYCbCr - allocate and fill an XieRGBToYCbCrParam structure
Syntax
XieRGBToYCbCrParam *XieTecRGBToYCbCr (levels, luma_red, luma_green,
luma_blue, bias)
XieLevels levels;
double luma_red;
double luma_green;
double luma_blue;
XieConstant bias;
Arguments
levels  Specifies the output levels.
luma_red        Specifies the proportion of red in the luminance band.
luma_green      Specifies the proportion of green in the luminance band.
luma_blue       Specifies the proportion of blue in the luminance band.
bias    Specifies an offset to add to the output pixels values.
Returns
The XieRGBToYCbCrParam structure.
Description
XieTecRGBToYCbCr allocates and returns a pointer to an XieRGBToYCbCrParam structure.
The returned structure represents the list of parameters required by the RGBToYCbCr color
conversion technique and may be used as the color_param argument of
XieFloConvertFromRGB (when the color_space argument is xieValRGBToYCbCr).

If insufficient memory is available, XieTecRGBToYCbCr returns NULL. To free the memory
allocated to this structure, use XFree.

XieTecRGBToYCbCr converts RGB data to the YCbCr colorspace. Source data may be constrained
or unconstrained; the output type will match. If the source data is constrained, levels determines
the output levels; otherwise levels is ignored.
Structures
XieTecRGBToYCbCr sets the structure field levels to the values of the argument levels; the
structure fields luma_red, luma_green, luma_blue to the values of the arguments luma_red,
luma_green, luma_blue; and the structure field bias to the values of the argument bias.

typedef float XieConstant[3];
typedef unsigned long XieLevels[3];
typedef struct {
        XieLevels levels;
        float luma_red;
        float luma_green;
        float luma_blue;
        XieConstant bias;
} XieRGBToYCbCrParam;
See Also
XieFloConvertFromRGB
 XIElib - Technique Functions   XieTecRGBToYCC
Name
XieTecRGBToYCC - allocate and fill an XieRGBToYCCParam structure
Syntax
XieRGBToYCCParam *XieTecRGBToYCC (levels, luma_red, luma_green,
luma_blue, scale)
XieLevels levels;
double luma_red;
double luma_green;
double luma_blue;
double scale;
Arguments
levels  Specifies the output levels.
luma_red        Specifies the proportion of red in the luminance band.
luma_green      Specifies the proportion of green in the luminance band.
luma_blue       Specifies the proportion of blue in the luminance band.
scale   Specifies a compression factor to apply to the output pixels values.
Returns
The XieRGBToYCCParam structure.
Description
XieTecRGBToYCC allocates and returns a pointer to an XieRGBToYCCParam structure. The
returned structure represents the list of parameters required by the RGBToYCC color conversion
technique and may be used as the color_param argument of XieFloConvertFromRGB (when
the color_space argument is xieValRGBToYCC).

If insufficient memory is available, XieTecRGBToYCC returns NULL. To free the memory allocated
to this structure, use XFree.

XieTecRGBToYCC converts RGB data to the YCC colorspace. The PhotoYCC color-encoding
scheme is defined in: KODAK PhotoCD System - A Planning Guide for Developers (Eastman Kodak
Co., Part no. DCI200R, 1991).

Source data may be constrained or unconstrained; the output type will match. If the source data is
constrained, levels determines the output levels; otherwise levels is ignored. Typical values
cited in the literature for scale are in the range of about 1.35 to 1.4.
Structures
XieTecRGBToYCC sets the structure field levels to the values of the argument levels; the
structure fields luma_red, luma_green, luma_blue are set to the values of the arguments
luma_red, luma_green, luma_blue; and the structure field scale to the value of the
argument scale.

typedef unsigned long XieLevels[3];
typedef struct {
        XieLevels levels;
        float luma_red;
        float luma_green;
        float luma_blue;
        float scale;
} XieRGBToYCCParam;
See Also
XieFloConvertFromRGB
 XIElib - Technique Functions   XieTecCIELabToRGB
Name
XieTecCIELabToRGB - allocate and fill an XieCIELabToRGBParam structure
Syntax
XieCIELabToRGBParam *XieTecCIELabToRGB (matrix, white_adjust_tech,
white_adjust_param, gamut_tech, gamut_param)
XieMatrix matrix;
XieWhiteAdjustTechnique white_adjust_tech;
XiePointer white_adjust_param;
XieGamutTechnique gamut_tech;
XiePointer gamut_param;
Arguments
matrix  Specifies the conversion matrix.
white_adjust_tech       Specifies the WhiteAdjust technique to be used.
white_adjust_param      Specifies the list of parameters required by white_adjust_tech.
gamut_tech      Specifies the Gamut technique to be used.
gamut_param     Specifies the list of parameters required by gamut_tech.
Returns
The XieCIELabToRGBParam structure.
Description
XieTecCIELabToRGB allocates and returns a pointer to an XieCIELabToRGBParam structure.
The returned structure represents the list of parameters required by the CIELabToRGB color
conversion technique and may be used as the color_param argument of XieFloConvertToRGB
(when the color_space argument is xieValCIELabToRGB).

If insufficient memory is available, XieTecCIELabToRGB returns NULL. To free the memory
allocated to this structure, use XFree.

XieTecCIELabToRGB converts CIELab data to the RGB colorspace. The CIELab colorspace is an
international standard designed for perceptual uniformity. The colorspace coordinates are denoted by
L, a, and b and are defined in CIE, Recommendations on Uniform Color Spaces, Color-Difference
Equations, Psychometric Color Terms (Bureau Central de la CIE [Supplement 2 of CIE Publication
15 (E-1.3.1) 1971], 1978).

matrix is a 3x3 CIEXYZ-to-RGB conversion matrix (the target white point is also encoded in
matrix). white_adjust_tech is the WhiteAdjust technique that can be used to shift the white
point of the source data prior to conversion. white_adjust_param is the list of parameters
required by white_adjust_tech. gamut_tech is the Gamut technique that can be used to keep
the output pixels within the bounds of the RGB colorspace. gamut_param is the list of parameters
required by gamut_tech.

The input data type must be unconstrained; the output data type is also unconstrained.

WhiteAdjust techniques define the white point adjustment techniques that can be used when
converting to or from the RGB colorspace. One of the following standard WhiteAdjust technique
values can be assigned to white_adjust_tech:

xieValWhiteAdjustDefault
xieValWhiteAdjustNone
xieValWhiteAdjustCIELabShift

If a vendor defined additional private WhiteAdjust techniques, the private technique values given to
these techniques can be assigned to white_adjust_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined or a private technique.

Gamut techniques define the gamut compression techniques used to deal with converted colors that
lie outside the gamut of the RGB space. One of the following standard gamut technique values can be
assigned to gamut_tech:

xieValGamutDefault
xieValGamutNone
xieValGamutClipRGB

If a vendor defined additional private gamut techniques, the private technique values given to these
techniques can be assigned to gamut_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined or a private technique.
Structures
XieTecCIELabToRGB sets the structure field matrix to the values of the argument matrix; the
structure field white_adjust_tech to the value of the argument white_adjust_tech; the
structure field white_adjust_param to the value of the argument white_adjust_param; the
structure field gamut_tech to the value of the argument gamut_tech; and the structure field
gamut_param to the value of the argument gamut_param.

typedef float XieMatrix[9];
typedef unsigned XieGamutTechnique;
typedef unsigned XieWhiteAdjustTechnique;
typedef struct {
        XieMatrix matrix;
        XieWhiteAdjustTechnique white_adjust_tech;
        XiePointer white_adjust_param;
        XieGamutTechnique gamut_tech;
        XiePointer gamut_param;
} XieCIELabToRGBParam;

/* Definitions for WhiteAdjust Techniques */
#define xieValWhiteAdjustDefault        0
#define xieValWhiteAdjustNone   1
#define xieValWhiteAdjustCIELabShift    2

/* Definitions for Gamut Techniques */
#define xieValGamutDefault      0
#define xieValGamutNone 1
#define xieValGamutClipRGB      2
See Also
XieFloConvertToRGB, XieTecWhiteAdjustCIELabShift
 XIElib - Technique Functions   XieTecCIEXYZToRGB
Name
XieTecCIEXYZToRGB -  allocate and fill an XieCIEXYZToRGBParam structure
Syntax
XieCIEXYZToRGBParam *XieTecCIEXYZToRGB (matrix, white_adjust_tech,
white_adjust_param, gamut_tech, gamut_param)
XieMatrix matrix;
XieWhiteAdjustTechnique white_adjust_tech;
XiePointer white_adjust_param;
XieGamutTechnique gamut_tech;
XiePointer gamut_param;
Arguments
matrix  Specifies the conversion matrix.
white_adjust_tech       Specifies the WhiteAdjust technique to be used.
white_adjust_param      Specifies the list of parameters required by white_adjust_tech.
gamut_tech      Specifies the Gamut technique to be used.
gamut_param     Specifies the list of parameters required by gamut_tech.
Returns
The XieCIEXYZToRGBParam structure.
Description
XieTecCIEXYZToRGB allocates and returns a pointer to an XieCIEXYZToRGBParam structure.
The returned structure represents the list of parameters required by the CIEXYZToRGB color
conversion technique and may be used as the color_param argument of XieFloConvertToRGB
(when the color_space argument is xieValCIEXYZToRGB).

If insufficient memory is available, XieTecCIEXYZToRGB returns NULL. To free the memory
allocated to this structure, use XFree.

XieTecCIEXYZToRGB converts CIEXYZ data to the RGB colorspace. The CIEXYZ colorspace is
an international standard device-independent colorspace.

matrix is a 3x3 CIEXYZ-to-RGB conversion matrix (the target white point is also encoded in
matrix). white_adjust_tech is the WhiteAdjust technique that can be used to shift the white
point of the source data prior to conversion. white_adjust_param is the list of parameters
required by white_adjust_tech. gamut_tech is the Gamut technique that can be used to keep
the output pixels within the bounds of the RGB colorspace. gamut_param is the list of parameters
required by gamut_tech.

The input data type must be unconstrained; the output data type is also unconstrained.

WhiteAdjust techniques define the white point adjustment techniques that can be used when
converting to or from the RGB colorspace. One of the following standard WhiteAdjust technique
values can be assigned to white_adjust_tech:

xieValWhiteAdjustDefault
xieValWhiteAdjustNone
xieValWhiteAdjustCIELabShift

If a vendor defined additional private WhiteAdjust techniques, the private technique values given to
these techniques can be assigned to white_adjust_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined  or a private technique.

Gamut techniques define the gamut compression techniques used to deal with converted colors that
lie outside the gamut of the RGB space. One of the following standard gamut technique values can be
assigned to gamut_tech:

xieValGamutDefault
xieValGamutNone
xieValGamutClipRGB

If a vendor defined additional private gamut techniques, the private technique values given to these
techniques can be assigned to gamut_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined  or a private technique.
Structures
XieTecCIEXYZToRGB sets the structure field matrix to the values of the argument matrix; the
structure field white_adjust_tech to the value of the argument white_adjust_tech; the
structure field white_adjust_param to the value of the argument white_adjust_param; the
structure field gamut_tech to the value of the argument gamut_tech; and the structure field
gamut_param to the value of the argument gamut_param.

typedef float XieMatrix[9];
typedef unsigned XieGamutTechnique;
typedef unsigned XieWhiteAdjustTechnique;
typedef struct {
        XieMatrix matrix;
        XieWhiteAdjustTechnique white_adjust_tech;
        XiePointer white_adjust_param;
        XieGamutTechnique gamut_tech;
        XiePointer gamut_param;
} XieCIEXYZToRGBParam;

/* Definitions for WhiteAdjust Techniques */
#define xieValWhiteAdjustDefault        0
#define xieValWhiteAdjustNone   1
#define xieValWhiteAdjustCIELabShift    2

/* Definitions for Gamut Techniques */
#define xieValGamutDefault      0
#define xieValGamutNone 1
#define xieValGamutClipRGB      2
See Also
XieFloConvertToRGB, XieTecWhiteAdjustCIELabShift
 XIElib - Technique Functions   XieTecYCbCrToRGB
Name
XieTecYCbCrToRGB - allocate and fill an XieYCbCrToRGBParam structure
Syntax
XieYCbCrToRGBParam *XieTecYCbCrToRGB (levels, luma_red, luma_green,
luma_blue, bias, gamut_tech, gamut_param)
XieLevels levels;
double luma_red;
double luma_green;
double luma_blue;
XieConstant bias;
XieGamutTechnique gamut_tech;
XiePointer gamut_param;
Arguments
levels  Specifies the output levels.
luma_red        Specifies the proportion of red in the luminance band (Y).
luma_green      Specifies the proportion of green in the luminance band (Y).
luma_blue       Specifies the proportion of blue in the luminance band (Y).
bias    Specifies an offset to remove from the source pixels values.
gamut_tech      Specifies the Gamut technique to be used.
gamut_param     Specifies the list of parameters required by gamut_tech.
Returns
The XieYCbCrToRGBParam structure.
Description
XieTecYCbCrToRGB allocates and returns a pointer to an XieYCbCrToRGBParam structure.
The returned structure represents the list of parameters required by the YCbCrToRGB color
conversion technique and may be used as the color_param argument of XieFloConvertToRGB
(when the color_space argument is xieValYCbCrToRGB).

If insufficient memory is available, XieTecYCbCrToRGB returns NULL. To free the memory
allocated to this structure, use XFree.

XieTecYCbCrToRGB converts YCbCr data to the RGB colorspace. Source data may be constrained
or unconstrained; the output type will match. If the source data is constrained, levels determines
the output levels; otherwise levels is ignored.

Gamut techniques define the gamut compression techniques used to deal with converted colors that
lie outside the gamut of the RGB space. One of the following standard gamut technique values can be
assigned to gamut_tech:

xieValGamutDefault
xieValGamutNone
xieValGamutClipRGB

If a vendor defined additional private gamut techniques, the private technique values given to these
techniques can be assigned to gamut_tech.

The server is required to support the default technique that is bound to one of the standard techniques
defined or a private technique.
Structures
XieTecYCbCrToRGB sets the structure field levels to the values of the argument levels; the
structure fields luma_red, luma_green, luma_blue to the values of the arguments luma_red,
luma_green, luma_blue; the structure field bias to the values of the argument bias; the
structure field gamut_tech to the value of the argument gamut_tech; and the structure field
gamut_param to the value of the argument gamut_param.

typedef float XieConstant[3];
typedef unsigned long XieLevels[3];
typedef unsigned XieGamutTechnique;
typedef struct {
        XieLevels levels;
        float luma_red;
        float luma_green;
        float luma_blue;
        XieConstant bias;
        XieGamutTechnique gamut_tech;
        XiePointer gamut_param;
} XieYCbCrToRGBParam;

/* Definitions for Gamut Techniques */
#define xieValGamutDefault      0
#define xieValGamutNone 1
#define xieValGamutClipRGB      2
See Also
XieFloConvertToRGB
 XIElib - Technique Functions   XieTecYCCToRGB
Name
XieTecYCCToRGB - allocate and fill an XieYCCToRGBParam structure
Syntax
XieYCCToRGBParam *XieTecYCCToRGB (levels, luma_red, luma_green,
luma_blue, scale, gamut_tech, gamut_param)
XieLevels levels;
double luma_red;
double luma_green;
double luma_blue;
double scale;
XieGamutTechnique gamut_tech;
XiePointer gamut_param;
Arguments
levels  Specifies the output levels.
luma_red        Specifies the proportion of red in the luminance band (Y).
luma_green      Specifies the proportion of green in the luminance band (Y).
luma_blue       Specifies the proportion of blue in the luminance band (Y).
scale   Specifies an expansion factor to apply to the output pixels values.
gamut_tech      Specifies the Gamut technique to be used.
gamut_param     Specifies the list of parameters required by gamut_tech.
Returns
The XieYCCToRGBParam structure.
Description
XieTecYCCToRGB allocates and returns a pointer to an XieYCCToRGBParam structure. The
returned structure represents the list of parameters required by the YCCToRGB color conversion
technique and may be used as the color_param argument of XieFloConvertToRGB (when the
color_space argument is xieValYCCToRGB).

If insufficient memory is available, XieTecYCCToRGB returns NULL. To free the memory allocated
to this structure, use XFree.

XieTecYCCToRGB converts YCC data to the RGB colorspace. The PhotoYCC color-encoding
scheme is defined in KODAK PhotoCD System - A Planning Guide for Developers (Eastman Kodak
Co., Part no. DCI200R, 1991).

Source data may be constrained or unconstrained; the output type will match. If the source data is
constrained, levels determines the output levels; otherwise levels is ignored. Typical values
cited in the literature for scale are in the range of about 1.35 to 1.4.

Gamut techniques define the gamut compression techniques used to deal with converted colors that
lie outside the gamut of the RGB space. One of the following standard gamut technique values can be
assigned to gamut_tech:

xieValGamutDefault
xieValGamutNone
xieValGamutClipRGB

If a vendor defined additional private gamut techniques, the private technique values given to these
techniques can be assigned to gamut_tech .

The server is required to support the default technique that is bound to one of the standard techniques
defined or a private technique.
Structures
XieTecYCCToRGB sets the structure field levels to the values of the argument levels; the
structure fields luma_red, luma_green, luma_blue to the values of the arguments luma_red,
luma_green, luma_blue; the structure field scale to the values of the argument scale; the
structure field gamut_tech to the value of the argument gamut_tech; and the structure field
gamut_param to the value of the argument gamut_param.

typedef unsigned long XieLevels[3];
typedef unsigned XieGamutTechnique;
typedef struct {
        XieLevels levels;
        float luma_red;
        float luma_green;
        float luma_blue;
        float scale;
        XieGamutTechnique gamut_tech;
        XiePointer gamut_param;
} XieYCCToRGBParam;

/* Definitions for Gamut Techniques */
#define xieValGamutDefault      0
#define xieValGamutNone 1
#define xieValGamutClipRGB      2

See Also
XieFloConvertToRGB
 XIElib - Technique Functions   XieTecClipScale
Name
XieTecClipScale - allocate and fill an XieClipScaleParam structure
Syntax
XieClipScaleParam *XieTecClipScale (in_low, in_high, out_low,
out_high)
XieConstant in_low;
XieConstant in_high;
XieLTriplet out_low;
XieLTriplet out_high;
Arguments
in_low  Specifies an input pixel limit.
in_high Specifies an input pixel limit.
out_low Specifies an output pixel limit.
out_high        Specifies an output pixel limit.
Returns
The XieClipScaleParam structure.
Description
XieTecClipScale allocates and returns a pointer to an XieClipScaleParam structure. The
returned structure represents the list of parameters required by the constrain technique and may be
used as the constrain_param argument of XieFloConstrain (when the
constrain_tech argument is xieValClipScale).

If insufficient memory is available, XieTecClipScale returns NULL. To free the memory
allocated to this structure, use XFree.

For each band, output pixels will be clipped to the range [out_low, out_high]. If in_low is less
than in_high, then all pixels less than or equal to in_low will map to out_low, and all pixels
that are greater than or equal to in_high will map to out_high. All intermediate pixel values are
scaled proportionately to the output range. Nonintegral output values are rounded to the nearest
integer.

If in_low is greater than in_high, then all pixels that are greater than or equal to in_low will
map to out_low, and all pixels that are less than or equal to in_high will map to out_high. All
intermediate pixel values will be linearly mapped to the output range, such that in_low maps to
out_low, and in_high maps to out_high. Nonintegral output values are rounded to the nearest
integer.

in_low should not equal in_high, out_low should be less than out_high, and out_high
should not exceed levels - 1.
Structures
XieTecClipScale sets the structure fields input_low, input_high to the values of the
arguments in_low, in_high; and the structure fields output_low, output_high to the
values of the arguments out_low, out_high.

typedef float XieConstant[3];
typedef unsigned long XieLTriplet[3];
typedef struct {
        XieConstant input_low,input_high;
        XieLTriplet output_low,output_high;
} XieClipScaleParam;
See Also
XieFloConstrain
 XIElib - Technique Functions   XieTecConvolveConstant
Name
XieTecConvolveConstant - allocate and fill an XieConvolveConstantParam structure
Syntax
XieConvolveConstantParam *XieTecConvolveConstant (constant)
XieConstant constant;
Arguments
constant        Specifies the value to use if pixels are required from beyond the edge
of the image.
Returns
The XieConvolveConstantParam structure.
Description
XieTecConvolveConstant allocates and returns a pointer to an
XieConvolveConstantParam structure. The returned structure represents the list of parameters
required by the convolve technique and may be used as the convolve_param argument of
XieFloConvolve (when the convolve_tech argument is xieValConvolveConstant).

If insufficient memory is available, XieTecConvolveConstant returns NULL. To free the
memory allocated to this structure, use XFree.

Various methods of handling edge conditions are provided for convolve techniques. These techniques
determine what pixel values are used when the convolve technique requires data beyond the image
bounds. Convolve techniques come into play only when the kernel is positioned partially off the edge
of the image. Data around the edges of a process domain are convolved with adjacent image
pixels wherever possible. A process domain is inserted in many element definitions and is used to
restrict the element's processing to a subset of the source data pixels; it can be either a list-of-
rectangles or a control-plane.

The Constant Convolve technique uses the value specified by constant if pixels are required from
beyond the edge of the image.
Structures
XieTecConvolveConstant sets the structure field constant to the value of the argument
constant.

typedef float XieConstant[3];
typedef struct {
        XieConstant constant;
} XieConvolveConstantParam;
See Also
XieFloConvolve
 XIElib - Technique Functions   XieTecDecodeUncompressedSingle
Name
XieTecDecodeUncompressedSingle - allocate and fill an
XieDecodeUncompressedSingleParam structure
Syntax
XieDecodeUncompressedSingleParam *XieTecDecodeUncompressedSingle
(fill_order, pixel_order, pixel_stride, left_pad,
scanline_pad)
XieOrientation fill_order;
XieOrientation pixel_order;
unsigned int pixel_stride;
unsigned int left_pad;
unsigned int scanline_pad;
Arguments
fill_order      Specifies the method of pixel packing.
pixel_order     Specifies pixel ordering within the data stream.
pixel_stride    Specifies the number of bits between consecutive pixels within a
scanline.
left_pad        Specifies the number of pad bits in each scanline.
scanline_pad    Specifies a multiple of bytes to which each scanline is padded.
Returns
The XieDecodeUncompressedSingleParam structure.
Description
XieTecDecodeUncompressedSingle allocates and returns a pointer to an
XieDecodeUncompressedSingleParam structure. The returned structure represents the list of
parameters required by the decode technique and may be used as the decode_param argument of
XieFloImportClientPhoto (when the decode_tech argument is
xieValDecodeUncompressedSingle).

If insufficient memory is available, XieTecDecodeUncompressedSingle returns NULL. To
free the memory allocated to this structure, use XFree.

The decode uncompressed single technique is used when no compression scheme has been applied to
single band image data. The parameters define the format of the data stream of uncompressed data
(the server may reformat the data as it chooses prior to processing or storage). When multiple pixels
are put in the same byte, or a pixel spans multiple bytes, fill_order specifies whether the pixels
(or parts of pixels) are packed into the most or least significant bits of a byte first. For pixels that span
a byte boundary, pixel_order defines whether the most or least significant bits of the pixel are
transported first within the data stream. One of the following standard orientation values can be
assigned to fill_order and pixel_order:

xieValLSFirst
xieValMSFirst

The following table shows the relationship between fill_order and pixel_order, using two
10-bit pixels, each with two bits of pad (within each pixel the LS-bits are 0 and a, the MS-bits are
9 and j, the pad bits are p).

fill order
LSFirst (pixel order)
MSFirst (pixel order)
LSFirst
76543210  dcbapp98  ppjihgfe
98765432  jihgpp10  ppfedcba
MSFirst
76543210  98ppdcba  jihgfepp
98765432  10ppjihg  fedcbapp

pixel_stride is the number of bits between the start of consecutive pixels within a scanline; it
must be at least enough bits to contain the number of input levels. left_pad is the number of pad
bits preceding the first image pixel in each scanline; if the server's Alignment attribute is Alignable,
or pixel_stride fits the definition of Alignable, the value of left_pad must be a multiple of
pixel_stride or a multiple of 8; otherwise, left_pad may be any arbitrary value.
scanline_pad defines a multiple of bytes to which each scanline is padded; valid values are: 0
(not aligned), 1, 2, 4, 8, and 16. The total number of bits-per-scanline in the data stream includes:
left_pad, the image data (width x pixel_stride), and sufficient additional bits to satisfy
scanline_pad.
Structures
XieTecDecodeUncompressedSingle sets the structure field fill_order to the value of the
argument fill_order; the structure field pixel_order to the value of the argument
pixel_order; the structure field pixel_stride to the value of the argument pixel_stride;
the structure field left_pad to the value of the argument left_pad; and the structure field
scanline_pad to the value of the argument scanline_pad.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation fill_order;
        XieOrientation pixel_order;
        unsigned int pixel_stride;
        unsigned int left_pad;
        unsigned int scanline_pad;
} XieDecodeUncompressedSingleParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloImportClientPhoto, XiePutClientData
 XIElib - Technique Functions   XieTecDecodeUncompressedTriple
Name
XieTecDecodeUncompressedTriple - allocate and fill an
XieDecodeUncompressedTripleParam structure
Syntax
XieDecodeUncompressedTripleParam *XieTecDecodeUncompressedTriple
(fill_order, pixel_order, band_order, interleave,
pixel_stride, left_pad, scanline_pad)
XieOrientation fill_order;
XieOrientation pixel_order;
XieOrientation band_order;
XieInterleave interleave;
unsigned char pixel_stride[3];
unsigned char left_pad[3];
unsigned char scanline_pad[3];
Arguments
fill_order      Specifies the method of pixel packing.
pixel_order     Specifies pixel ordering within the data stream.
band_order      Specifies the order of the image data sent through the protocol stream.
interleave      Specifies how the image bands are interleaved.
pixel_stride    Specifies the number of bits between consecutive pixels within a
scanline.
left_pad        Specifies the number of pad bits in each scanline.
scanline_pad    Specifies a multiple of bytes to which each scanline is padded.
Returns
The XieDecodeUncompressedTripleParam structure.
Description
XieTecDecodeUncompressedTriple allocates and returns a pointer to an
XieDecodeUncompressedTripleParam structure. The returned structure represents the list of
parameters required by the decode technique and may be used as the decode_param argument of
XieFloImportClientPhoto (when the decode_tech argument is
xieValDecodeUncompressedTriple).

If insufficient memory is available, XieTecDecodeUncompressedTriple returns NULL. To
free the memory allocated to this structure, use XFree.

The decode uncompressed triple technique is used when no compression scheme has been applied to
triple band image data. The parameters define the format of the data stream of uncompressed data
(the server may reformat the data as it chooses prior to processing or storage). When multiple pixels
are put in the same byte, or a pixel spans multiple bytes, fill_order specifies whether the pixels
(or parts of pixels) are packed into the most or least significant bits of a byte first. For pixels that span
a byte boundary, pixel_order defines whether the most or least significant bits of the pixel are
transported first within the data stream.

One of the following standard orientation values can be assigned to fill_order and
pixel_order:

xieValLSFirst
xieValMSFirst

The following table shows the relationship between fill_order and pixel_order, using two
10-bit pixels, each with two bits of pad (within each pixel the LS-bits are 0 and a, the MS-bits are
9 and j, the pad bits are p)

fill order
LSFirst (pixel order)
MSFirst (pixel order)
LSFirst
76543210  dcbapp98  ppjihgfe
98765432  jihgpp10  ppfedcba
MSFirst
76543210  98ppdcba  jihgfepp
98765432  10ppjihg  fedcbapp

pixel_stride is the number of bits between the start of consecutive pixels within a scanline; It
must be at least enough bits to contain the number of input levels. left_pad is the number of pad
bits preceding the first image pixel in each scanline; if the server's Alignment attribute is Alignable,
or pixel_stride fits the definition of Alignable, the value of left_pad must be a multiple of
pixel_stride or a multiple of 8; otherwise, left_pad may be any arbitrary value.
scanline_pad defines a multiple of bytes to which each scanline is padded; valid values are: 0
(not aligned), 1, 2, 4, 8, and 16. The total number of bits-per-scanline in the data stream includes:
left_pad, the image data (width x pixel_stride), and sufficient additional bits to satisfy
scanline_pad.

interleave describes how the image bands are interleaved (per pixel within a single plane, or sent
as three separate planes); if interleave is xieValBandByPixel, inter-band dimensions must
match: the widths and the heights of all bands must match. One of the following standard interleave
values can be assigned to interleave:

xieValBandByPixel
xieValBandByPlane

band_order is the order of the image bands or image planes as they are transmitted through the
protocol stream. band_order can be set to one of the standard orientation values. The least
significant band of trichromatic data is the first band mentioned in the common name of the
colorspace : red is the least significant band of RGB data. For band-by-pixel data, band_order
specifies whether this band is put in the least or most significant bits of a pixel:

LSFirst
MSFirst
B1B0G2G1G0R2R1R0
R2R1R0G2G1G0B1B0

For band-by-plane data, band_order specifies whether this band corresponds with the least
significant or most significant image plane. Each plane is transported as a separate data stream:

band
LSFirst
MSFirst
0
R7R6R5R4R3R2R1R0
B7B6B5B4B3B2B1B0
1
G7G6G5G4G3G2G1G0
G7G6G5G4G3G2G1G0
2
B7B6B5B4B3B2B1B0
R7R6R5R4R3R2R1R0

Structures
XieTecDecodeUncompressedTriple sets the structure field fill_order to the value of the
argument fill_order; the structure field pixel_order to the value of the argument
pixel_order; the structure field band_order to the value of the argument band_order; the
structure field interleave to the value of the argument interleave; the structure field
pixel_stride to the value of the argument pixel_stride; the structure field left_pad to
the value of the argument left_pad; and the structure field scanline_pad to the value of the
argument scanline_pad.

typedef unsigned XieOrientation;
typedef unsigned XieInterleave;
typedef struct {
        unsigned char left_pad[3];
        XieOrientation fill_order;
        unsigned char pixel_stride[3];
        XieOrientation pixel_order;
        unsigned char scanline_pad[3];
        XieOrientation band_order;
        XieInterleave interleave;
} XieDecodeUncompressedTripleParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2

/* Definitions for Interleave */
#define xieValBandByPixel       1
#define xieValBandByPlane       2
See Also
XieFloImportClientPhoto, XiePutClientData
 XIElib - Technique Functions   XieTecDecodeG31D
Name
XieTecDecodeG31D - allocate and fill an XieDecodeG31DParam structure
Syntax
XieDecodeG31DParam *XieTecDecodeG31D (encoded_order, normal,
radiometric)
XieOrientation encoded_order;
Bool normal;
Bool radiometric;
Arguments
encoded_order   Specifies the bit order of the encoded data.
normal  Specifies how the data was processed when it was originally encoded.
radiometric     Specifies how white runs are decoded.
Returns
The XieDecodeG31DParam structure.
Description
XieTecDecodeG31D allocates and returns a pointer to an XieDecodeG31DParam structure.
The returned structure represents the list of parameters required by the decode technique and may be
used as the decode_param argument of XieFloImportClientPhoto (when the
decode_tech argument is xieValDecodeG31D).

If insufficient memory is available, XieTecDecodeG31D returns NULL. To free the memory
allocated to this structure, use XFree.

CCITT-G31D is the CCITT group 3 one-dimensional encoding technique as defined by CCITT T.4,
"Standardization of Group 3 Facsimile Apparatus for Document Transmission".

encoded_order specifies the bit order of the encoded data. One of the following standard
orientation values can be assigned to encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567

radiometric specifies that white runs in the encoded data should be represented as image ones
upon decode (maximum intensity), or conversely, they will be decoded as image zeros if
radiometric is False. normal specifies that the data was processed according to its normal fill-
order when it was originally encoded.
Structures
XieTecDecodeG31D sets the structure field encoded_order to the value of the argument
encoded_order; the structure field normal to the value of the argument normal; and the
structure field radiometric to the value of the argument radiometric.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation encoded_order;
        Bool normal;
        Bool radiometric;
} XieDecodeG31DParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloImportClientPhoto, XiePutClientData
 XIElib - Technique Functions   XieTecDecodeG32D
Name
XieTecDecodeG32D - allocate and fill an XieDecodeG32DParam structure
Syntax
XieDecodeG32DParam *XieTecDecodeG32D (encoded_order, normal,
radiometric)
XieOrientation encoded_order;
Bool normal;
Bool radiometric;
Arguments
encoded_order   Specifies the bit order of the encoded data.
normal  Specifies how the data was processed when it was originally encoded.
radiometric     Specifies how white runs are decoded.
Returns
The XieDecodeG32DParam structure.
Description
XieTecDecodeG32D allocates and returns a pointer to an XieDecodeG32DParam structure.
The returned structure represents the list of parameters required by the decode technique and may be
used as the decode_param argument of XieFloImportClientPhoto (when the
decode_tech argument is xieValDecodeG32D).

If insufficient memory is available, XieTecDecodeG32D returns NULL. To free the memory
allocated to this structure, use XFree.

CCITT-G32D is the CCITT group 3 two-dimensional encoding technique as defined by CCITT T.4,
"Standardization of Group 3 Facsimile Apparatus for Document Transmission".

encoded_order specifies the bit order of the encoded data. One of the following standard
orientation values can be assigned to encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0,  and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567

radiometric specifies that white runs in the encoded data should be represented as image ones
upon decode (maximum intensity), or conversely, they will be decoded as image zeros if
radiometric is False. normal specifies that the data was processed according to its normal fill-
order when it was originally encoded.
Structures
XieTecDecodeG32D sets the structure field encoded_order to the value of the argument
encoded_order; the structure field normal to the value of the argument normal; and the
structure field radiometric to the value of the argument radiometric.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation encoded_order;
        Bool normal;
        Bool radiometric;
} XieDecodeG32DParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloImportClientPhoto, XiePutClientData
 XIElib - Technique Functions   XieTecDecodeG42D
Name
XieTecDecodeG42D - allocate and fill an XieDecodeG42DParam structure
Syntax
XieDecodeG42DParam *XieTecDecodeG42D (encoded_order, normal,
radiometric))
XieOrientation encoded_order;
Bool normal;
Bool radiometric;
Arguments
encoded_order   Specifies the bit order of the encoded data.
normal  Specifies how the data was processed when it was originally encoded.
radiometric     Specifies how white runs are decoded.
Returns
The XieDecodeG42DParam structure.
Description
XieTecDecodeG42D allocates and returns a pointer to an XieDecodeG42DParam structure.
The returned structure represents the list of parameters required by the decode technique and may be
used as the decode_param argument of XieFloImportClientPhoto (when the
decode_tech argument is xieValDecodeG42D).

If insufficient memory is available, XieTecDecodeG42D returns NULL. To free the memory
allocated to this structure, use XFree.

CCITT-G42D is the CCITT group 4 two-dimensional encoding technique as defined by CCITT T.6,
"Facsimile Coding Schemes and Coding Control Functions for Group 4 Facsimile Apparatus".

encoded_order specifies the bit order of the encoded data. One of the following standard
orientation values can be assigned to encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567

radiometric specifies that white runs in the encoded data should be represented as image ones
upon decode (maximum intensity), or conversely, they will be decoded as image zeros if
radiometric is False. normal specifies that the data was processed according to its normal fill-
order when it was originally encoded.
Structures
XieTecDecodeG42D sets the structure field encoded_order to the value of the argument
encoded_order; the structure field normal to the value of the argument normal; and the
structure field radiometric to the value of the argument radiometric.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation encoded_order;
        Bool normal;
        Bool radiometric;
} XieDecodeG42DParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloImportClientPhoto, XiePutClientData
 XIElib - Technique Functions   XieTecDecodeTIFF2
Name
XieTecDecodeTIFF2 - allocate and fill an XieDecodeTIFF2Param structure
Syntax
XieDecodeTIFF2Param *XieTecDecodeTIFF2 (encoded_order, normal,
radiometric)
XieOrientation encoded_order;
Bool normal;
Bool radiometric;
Arguments
encoded_order   Specifies the bit order of the encoded data.
normal  Specifies how the data was processed when it was originally encoded.
radiometric     Specifies how white runs are decoded.
Returns
The XieDecodeTIFF2Param structure.
Description
XieTecDecodeTIFF2 allocates and returns a pointer to an XieDecodeTIFF2Param structure.
The returned structure represents the list of parameters required by the decode technique and may be
used as the decode_param argument of XieFloImportClientPhoto (when the
decode_tech argument is xieValDecodeTIFF2).

If insufficient memory is available, XieTecDecodeTIFF2 returns NULL. To free the memory
allocated to this structure, use XFree.

TIFF-2 is modified Huffman encoding as described in "TIFF Tag Image File Format", revision 6.0,
draft 2, by Aldus Corporation (TIFF compression scheme 2).

encoded_order specifies the bit order of the encoded data. One of the following standard
orientation values can be assigned to encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567

radiometric specifies that white runs in the encoded data should be represented as image ones
upon decode (maximum intensity), or conversely, they will be decoded as image zeros if
radiometric is False. normal specifies that the data was processed according to its normal fill-
order when it was originally encoded.
Structures
XieTecDecodeTIFF2 sets the structure field encoded_order to the value of the argument
encoded_order; the structure field normal to the value of the argument normal; and the
structure field radiometric to the value of the argument radiometric.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation encoded_order;
        Bool normal;
        Bool radiometric;
} XieDecodeTIFF2Param;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloImportClientPhoto, XiePutClientData
 XIElib - Technique Functions   XieTecDecodeTIFFPackBits
Name
XieTecDecodeTIFFPackBits - allocate and fill an XieDecodeTIFFPackBitsParam structure
Syntax
XieDecodeTIFFPackBitsParam *XieTecDecodeTIFFPackBits (encoded_order,
normal)
XieOrientation encoded_order;
Bool normal;
Arguments
encoded_order   Specifies the bit order of the encoded data.
normal  Specifies how the data was processed when it was originally encoded.
Returns
The XieDecodeTIFFPackBitsParam structure.
Description
XieTecDecodeTIFFPackBits allocates and returns a pointer to an
XieDecodeTIFFPackBitsParam structure. The returned structure represents the list of
parameters required by the decode technique and may be used as the decode_param argument of
XieFloImportClientPhoto (when the decode_tech argument is
xieValDecodeTIFFPackBits).

If insufficient memory is available, XieTecDecodeTIFFPackBits returns NULL. To free the
memory allocated to this structure, use XFree.

TIFF-PackBits is byte-oriented run-length encoding as described in "TIFF Tag Image File Format",
revision 6.0, draft 2, by Aldus Corporation (TIFF compression scheme 32773).

encoded_order specifies the bit order of the encoded data. One of the following standard
orientation values can be assigned to encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567

normal specifies that the data was processed according to its normal fill-order when it was
originally encoded.
Structures
XieTecDecodeTIFFPackBits sets the structure field encoded_order to the value of the
argument encoded_order and the structure field normal to the value of the argument normal.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation encoded_order;
        Bool normal;
} XieDecodeTIFFPackBitsParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloImportClientPhoto, XiePutClientData
 XIElib - Technique Functions   XieTecDecodeJPEGBaseline
Name
XieTecDecodeJPEGBaseline - allocate and fill an XieDecodeJPEGBaselineParam structure
Syntax
XieDecodeJPEGBaselineParam *XieTecDecodeJPEGBaseline (interleave,
band_order, up_sample)
XieInterleave interleave;
XieOrientation band_order;
Bool up_sample;
Arguments
interleave      Specifies how the image bands will be interleaved.
band_order      Specifies the order in which the image bands were originally encoded.
up_sample       Specifies how interleaved encoded data are up-sampled.
Returns
The XieTecDecodeJPEGBaselineParam structure.
Description
XieDecodeJPEGBaseline allocates and returns a pointer to an
XieDecodeJPEGBaselineParam structure. The returned structure represents the list of
parameters required by the decode technique and may be used as the decode_param argument of
XieFloImportClientPhoto (when the decode_tech argument is
xieValDecodeJPEGBaseline).

If insufficient memory is available, XieTecDecodeJPEGBaseline returns NULL. To free the
memory allocated to this structure, use XFree.

The JPEG baseline technique is the baseline Huffman DCT encoding technique that is defined in ISO
DIS 10918-1 "Digital Compression and Coding of Continuous-tone Still Images". Only JPEG
Interchange Format (JIF) is supported: all tables, compressed data, and so on are embedded in the
data stream, all delineated by markers.

interleave determines whether all bands of a triple band image will be interleaved within a single
encoded stream  or whether three separate encoded streams will be supplied. One of the following
standard interleave values can be assigned to interleave:

xieValBandByPixel
xieValBandByPlane

For triple band data, band_order specifies the order in which the image bands were originally
encoded.  One of the following standard orientation values can be assigned to band_order:

xieValLSFirst
xieValMSFirst

The least significant band of trichromatic data is the first band mentioned in the common name of the
colorspace: red is the least significant band of RGB data. band_order specifies whether this band
corresponds with the least significant or most significant image plane. Each plane is decoded into a
separate data stream:

band
LSFirst
MSFirst
0
Red band
Blue band
1
Green band
Green band
2
Blue band
Red band

up_sample specifies that if any bands in an interleaved encoded data stream are down-sampled,
they should be up-sampled by the JPEG decoder.

The arguments interleave, band_order, and up_sample are ignored for single band images,
and up_sample is always ignored if interleave is band-by-plane. If up_sample is False and
some of the encoded bands of an interleaved image were down-sampled, an alternative method for up-
sampling the image would be to use a geometry element with appropriate band_mask and sample
technique parameters.
Structures
XieTecDecodeJPEGBaseline sets the structure field interleave to the value of the
argument interleave; the structure field band_order to the value of the argument
band_order; and the structure field up_sample to the value of the argument up_sample.

typedef unsigned XieOrientation;
typedef struct {
        XieInterleave interleave;
        XieOrientation band_order;
        Bool up_sample;
} XieDecodeJPEGBaselineParam;
/* Definitions for Interleave */
#define xieValBandByPixel       1
#define xieValBandByPlane       2

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloImportClientPhoto, XieFloConvertToRGB, XieTecYCbCrToRGB, XiePutClientData
 XIElib - Technique Functions   XieTecDecodeJPEGLossless
Name
XieTecDecodeJPEGLossless - allocate and fill an XieDecodeJPEGLosslessParam structure
Syntax
XieDecodeJPEGLosslessParam *XieTecDecodeJPEGLossless (interleave,
band_order)
XieInterleave interleave;
XieOrientation band_order;
Arguments
interleave      Specifies how the image bands will be interleaved.
band_order      Specifies the order in which the image bands were originally encoded.
Returns
The XieDecodeJPEGLosslessParam structure.
Description
XieTecDecodeJPEGLossless allocates and returns a pointer to an
XieDecodeJPEGLosslessParam structure. The returned structure represents the list of
parameters required by the decode technique and may be used as the decode_param argument of
XieFloImportClientPhoto (when the decode_tech argument is
xieValDecodeJPEGLossless).

If insufficient memory is available, XieTecDecodeJPEGLossless returns NULL. To free the
memory allocated to this structure, use XFree.

The JPEG lossless technique is the Huffman predictive sequential lossless encoding technique that is
defined in ISO DIS 10918-1 "Digital Compression and Coding of Continuous-tone Still Images".
This technique is not available in the R6 sample implementation of XIE.

interleave describes how the bands of triple band data are interleaved; either all bands are
interleaved within a single encoded stream, or three separate encoded streams are expected. One of
the following standard interleave values can be assigned to interleave:

xieValBandByPixel
xieValBandByPlane

For triple band data, band_order specifies the order in which the image bands were originally
encoded. One of the following standard orientation values can be assigned to band_order:

xieValLSFirst
xieValMSFirst

The least significant band of trichromatic data is the first band mentioned in the common name of the
colorspace: red is the least significant band of RGB data. band_order specifies whether this band
corresponds with the least significant or most significant image plane. Each plane is decoded into a
separate data stream:

band
LSFirst
MSFirst
0
Red band
Blue band
1
Green band
Green band
2
Blue band
Red band

The arguments interleave and band_order are ignored for single band images.
Structures
XieTecDecodeJPEGLossless sets the structure field interleave to the value of the
argument interleave; and the structure field band_order to the value of the argument
band_order.

typedef unsigned XieOrientation;
typedef struct {
        XieInterleave interleave;
        XieOrientation band_order;
} XieDecodeJPEGLosslessParam;
/* Definitions for Interleave */
#define xieValBandByPixel       1
#define xieValBandByPlane       2

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloImportClientPhoto, XiePutClientData
 XIElib - Technique Functions   XieTecDitherOrdered
Name
XieTecDitherOrdered -  allocate and fill an XieDitherOrderedParam structure
Syntax
XieDitherOrderedParam *XieTecDitherOrdered (threshold_order)
unsigned int threshold_order;
Arguments
threshold_order Specifies a value to determine the size of the dither matrix.
Returns
The XieDitherOrderedParam structure.
Description
XieTecDitherOrdered allocates and returns a pointer to an XieDitherOrderedParam
structure. The returned structure represents the list of parameters required by the decode technique
and may be used as the decode_param argument of XieFloImportClientPhoto (when the
decode_tech argument is xieValDitherOrdered).

If insufficient memory is available, XieTecDitherOrdered returns NULL. To free the memory
allocated to this structure, use XFree.

The dispersed-dot ordered dither technique replaces a matrix, or block, of pixels with a patterned
matrix of pixels. This patterned matrix of pixels is applied across the entire image. Because these
patterns may introduce artifacts that are distracting to the eye, the threshold_order parameter is
available to determine the size of the dither matrix, and therefore, the number of levels that can be
simulated. If the value of threshold_order is m, the threshold matrix can simulate 2m + 1 levels.
Structures
XieTecDitherOrdered sets the structure field threshold_order to the value of the
argument threshold_order.

typedef struct {
        unsigned int threshold_order;
} XieDitherOrderedParam;
See Also
XieFloDither
 XIElib - Technique Functions   XieTecEncodeUncompressedSingle
Name
XieTecEncodeUncompressedSingle - allocate and fill an
XieEncodeUncompressedSingleParam structure
Syntax
XieEncodeUncompressedSingleParam *XieTecEncodeUncompressedSingle
(fill_order, pixel_order, pixel_stride, scanline_pad)
XieOrientation fill_order;
XieOrientation pixel_order;
unsigned int pixel_stride;
unsigned int scanline_pad;
Arguments
fill_order      Specifies the method of pixel packing.
pixel_order     Specifies pixel ordering within the data stream.
pixel_stride    Specifies the number of bits between consecutive pixels within a
scanline.
scanline_pad    Specifies a multiple of bytes to which each scanline is padded.
Returns
The XieEncodeUncompressedSingleParam structure.
Description
XieTecEncodeUncompressedSingle allocates and returns a pointer to an
XieEncodeUncompressedSingleParam structure. The returned structure represents the list of
parameters required by the encode technique and may be used as the encode_param argument of
XieFloExportClientPhoto and XieFloExportPhotomap (when the encode_tech
argument is xieValEncodeUncompressedSingle).

If insufficient memory is available, XieTecEncodeUncompressedSingle returns NULL. To
free the memory allocated to this structure, use XFree.

The encode uncompressed single technique is used when no compression scheme is to be applied to
single band image data. The parameters define the format of the data stream of uncompressed data
that is made available for client retrieval via XieGetClientData. When multiple pixels are put in
the same byte or a pixel spans multiple bytes, fill_order specifies whether the pixels (or parts of
pixels) are packed into the most or least significant bits of a byte first. For pixels that span a byte
boundary, pixel_order defines whether the most or least significant bits of the pixel are put first
within the data stream.

One of the following standard orientation values can be assigned to fill_order and
pixel_order:

xieValLSFirst
xieValMSFirst

The following table shows the relationship between fill_order and pixel_order, using two
10-bit pixels, each with two bits of pad (within each pixel the LS-bits are 0 and a, the MS-bits are
9 and j,  and the pad bits are p).

fill order
LSFirst (pixel order)
MSFirst (pixel order)
LSFirst
76543210  dcbapp98  ppjihgfe
98765432  jihgpp10  ppfedcba
MSFirst
76543210  98ppdcba  jihgfepp
98765432  10ppjihg  fedcbapp

pixel_stride is the number of bits between the start of consecutive pixels within a scanline. It
must be at least enough bits to contain the number of source levels. scanline_pad defines a
multiple of bytes to which each scanline is padded; valid values are: 0 (not aligned), 1, 2, 4, 8, and
16.
Structures
XieTecEncodeUncompressedSingle sets the structure field fill_order to the value of the
argument fill_order; the structure field pixel_order to the value of the argument
pixel_order; the structure field pixel_stride to the value of the argument pixel_stride;
and the structure field scanline_pad to the value of the argument scanline_pad.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation fill_order;
        XieOrientation pixel_order;
        unsigned int pixel_stride;
        unsigned int scanline_pad;
} XieEncodeUncompressedSingleParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieGetClientData
 XIElib - Technique Functions   XieTecEncodeUncompressedTriple
Name
XieTecEncodeUncompressedTriple - allocate and fill an
XieEncodeUncompressedTripleParam structure
Syntax
XieEncodeUncompressedTripleParam *XieTecEncodeUncompressedTriple
(fill_order, pixel_order, band_order, interleave,
pixel_stride, scanline_pad)
XieOrientation fill_order;
XieOrientation pixel_order;
XieOrientation band_order;
XieInterleave interleave;
unsigned char pixel_stride[3];
unsigned char scanline_pad[3];
Arguments
fill_order      Specifies the method of pixel packing.
pixel_order     Specifies pixel ordering within the data stream.
band_order      Specifies the order of the image data sent through the protocol stream.
interleave      Specifies how the image bands are interleaved.
pixel_stride    Specifies the number of bits between consecutive pixels within a
scanline.
scanline_pad    Specifies a multiple of bytes to which each scanline is padded.
Returns
The XieEncodeUncompressedTripleParam structure.
Description
XieTecEncodeUncompressedTriple allocates and returns a pointer to an
XieEncodeUncompressedTripleParam structure. The returned structure represents the list of
parameters required by the encode technique and may be used as the encode_param argument of
XieFloExportClientPhoto and XieFloExportPhotomap (when the encode_tech
argument is xieValEncodeUncompressedTriple).

If insufficient memory is available, XieTecEncodeUncompressedTriple returns NULL. To
free the memory allocated to this structure, use XFree.

The encode uncompressed triple technique is used when no compression scheme is to be applied to
triple band image data. The parameters define the format of the data stream of uncompressed data
that is made available for client retrieval via XieGetClientData. When multiple pixels are put in
the same byte or a pixel spans multiple bytes, fill_order specifies whether the pixels (or parts of
pixels) are packed into the most or least significant bits of a byte first. For pixels that span a byte
boundary, pixel_order defines whether the most or least significant bits of the pixel are put first
within the data stream.

One of the following standard orientation values can be assigned to fill_order and
pixel_order:

xieValLSFirst
xieValMSFirst

The following  table shows the relationship between fill_order and pixel_order, using two
10-bit pixels, each with two bits of pad (within each pixel the LS-bits are 0 and a, the MS-bits are
9 and j, and the pad bits are p)

fill order
LSFirst (pixel order)
MSFirst (pixel order)
LSFirst
76543210  dcbapp98  ppjihgfe
98765432  jihgpp10  ppfedcba
MSFirst
76543210  98ppdcba  jihgfepp
98765432  10ppjihg  fedcbapp

pixel_stride is the number of bits between the start of consecutive pixels within a scanline. It
must be at least enough bits to contain the number of source levels. scanline_pad defines a
multiple of bytes to which each scanline is padded; valid values are: 0 (not aligned), 1, 2, 4, 8, and
16. band_order is the order of the image bands or image planes as they are transmitted through
the protocol stream. One of the following standard orientation values can be assigned to
band_order:

xieValLSFirst
xieValMSFirst

The least significant band of trichromatic data is the first band mentioned in the common name of the
colorspace: red is the least significant band of RGB data. For band-by-pixel data, band_order
specifies whether this band is put in the least or most significant bits of a pixel:

LSFirst
MSFirst
B1B0G2G1G0R2R1R0
R2R1R0G2G1G0B1B0

For band-by-plane data, band_order specifies whether this band corresponds with the least
significant or most significant image plane. Each plane is transported as a separate data stream:

band
LSFirst
MSFirst
0
R7R6R5R4R3R2R1R0
B7B6B5B4B3B2B1B0
1
G7G6G5G4G3G2G1G0
G7G6G5G4G3G2G1G0
2
B7B6B5B4B3B2B1B0
R7R6R5R4R3R2R1R0

interleave describes how the bands are interleaved (per pixel within a single plane, or sent as
three separate planes). One of the following standard interleave values can be assigned to
interleave:

xieValBandByPixel
xieValBandByPlane

Export of down-sampled band-by-pixel data is not supported: all bands must have equal widths and
equal heights.
Structures
XieTecEncodeUncompressedTriple sets the structure field fill_order to the value of the
argument fill_order; the structure field pixel_order to the value of the argument
pixel_order; the structure field band_order to the value of the argument band_order; the
structure field interleave to the value of the argument interleave; the structure field
pixel_stride to the value of the argument pixel_stride; and the structure field
scanline_pad to the value of the argument scanline_pad.

typedef unsigned XieOrientation;
typedef struct {
        unsigned char pixel_stride[3];
        XieOrientation pixel_order;
        unsigned char scanline_pad[3];
        XieOrientation fill_order;
        XieOrientation band_order;
        XieInterleave interleave;
} XieEncodeUncompressedTripleParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2

/* Definitions for Interleave */
#define xieValBandByPixel       1
#define xieValBandByPlane       2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieGetClientData
 XIElib - Technique Functions   XieTecEncodeG31D
Name
XieTecEncodeG31D - allocate and fill an XieEncodeG31DParam structure
Syntax
XieEncodeG31DParam *XieTecEncodeG31D (align_eol, radiometric,
encoded_order)
Bool align_eol;
Bool radiometric;
XieOrientation encoded_order;
Arguments
align_eol       Specifies the use of fill bits preceding EOL codes.
radiometric     Specifies how white runs are encoded.
encoded_order   Specifies the bit order of the encoded data.
Returns
The XieEncodeG31DParam structure.
Description
XieTecEncodeG31D allocates and returns a pointer to an XieEncodeG31DParam structure.
The returned structure represents the list of parameters required by the encode technique and may be
used as the encode_param argument of XieFloExportClientPhoto and
XieFloExportPhotomap (when the encode_tech argument is xieValEncodeG31D).

If insufficient memory is available, XieTecEncodeG31D returns NULL. To free the memory
allocated to this structure, use XFree.

CCITT-G31D is the CCITT group 3 one-dimensional encoding technique as defined by CCITT T.4,
"Standardization of Group 3 Facsimile Apparatus for Document Transmission".

If True, align_eol, specifies that sufficient fill bits must precede EOL codes to guarantee that
each EOL will end on a byte boundary (thus EOL will be a nibble of zero followed by a byte of one:
xxxx,00002 0000,00012). radiometric specifies that image ones will be encoded as white runs,
or conversely, image zeros will be encoded as white runs, if radiometric is False.
encoded_order specifies the bit order for the encoded data. One of the following standard
orientation values can be assigned to encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567
Structures
XieTecEncodeG31D sets the structure field align_eol to the value of the argument
align_eol; the structure field radiometric to the value of the argument radiometric; and
the structure field encoded_order to the value of the argument encoded_order.

typedef unsigned XieOrientation;
typedef struct {
        Bool align_eol;
        Bool radiometric;
        XieOrientation encoded_order;
} XieEncodeG31DParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieGetClientData
 XIElib - Technique Functions   XieTecEncodeG32D
Name
XieTecEncodeG32D - allocate and fill an XieEncodeG32DParam structure
Syntax
XieEncodeG32DParam *XieTecEncodeG32D (uncompressed, align_eol,
radiometric, encoded_order, k_factor)
Bool uncompressed;
Bool align_eol;
Bool radiometric;
XieOrientation encoded_order;
unsigned long k_factor;
Arguments
uncompressed    Specifies the use of the uncompressed-mode CCITT extension.
align_eol       Specifies the use of fill bits preceding EOL codes.
radiometric     Specifies how white runs are encoded.
encoded_order   Specifies the bit order of the encoded data.
k_factor        Specifies the number of  two-dimensional scanlines to produce for
each  one-dimensional scanline.
Returns
The XieEncodeG32DParam structure.
Description
XieTecEncodeG32D allocates and returns a pointer to an XieEncodeG32DParam structure.
The returned structure represents the list of parameters required by the encode technique and may be
used as the encode_param argument of XieFloExportClientPhoto and
XieFloExportPhotomap (when the encode_tech argument is xieValEncodeG32D).

If insufficient memory is available, XieTecEncodeG32D returns NULL. To free the memory
allocated to this structure, use XFree.

CCITT-G32D is the CCITT group 3 two-dimensional encoding technique as defined by CCITT T.4,
"Standardization of Group 3 Facsimile Apparatus for Document Transmission".

If True, uncompressed, will enable the use of the uncompressed-mode CCITT extension. If
True, align_eol, specifies that sufficient fill bits must precede EOL codes to guarantee that each
EOL will end on a byte boundary (thus EOL will be a nibble of zero followed by a byte of  one:
xxxx,00002 0000,00012). radiometric specifies that image ones will be encoded as white runs,
or conversely, image zeros will be encoded as white runs, if radiometric is False.
encoded_order specifies the bit order for the encoded data.  One of the following standard
orientation values can be assigned to encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567

k_factor specifies the number of  two-dimensional scanlines to produce for each one-dimensional
scanline.
Structures
XieTecEncodeG32D sets the structure field uncompressed to the value of the argument
uncompressed; the structure field align_eol to the value of the argument align_eol; the
structure field radiometric to the value of the argument radiometric; the structure field
encoded_order to the value of the argument encoded_order; and the structure field
k_factor to the value of the argument k_factor.

typedef unsigned XieOrientation;
typedef struct {
        Bool uncompressed;
        Bool align_eol;
        Bool radiometric;
        XieOrientation encoded_order;
        unsigned long k_factor;
} XieEncodeG32DParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieGetClientData
 XIElib - Technique Functions   XieTecEncodeG42D
Name
XieTecEncodeG42D - allocate and fill an XieEncodeG42DParam structure
Syntax
XieEncodeG42DParam *XieTecEncodeG42D (uncompressed, radiometric,
encoded_order)
Bool uncompressed;
Bool radiometric;
XieOrientation encoded_order;
Arguments
uncompressed    Specifies the use of the uncompressed-mode CCITT extension.
radiometric     Specifies how white runs are encoded.
encoded_order   Specifies the bit order of the encoded data.
Returns
The XieEncodeG42DParam structure.
Description
XieTecEncodeG42D allocates and returns a pointer to an XieEncodeG42DParam structure.
The returned structure represents the list of parameters required by the encode technique and may be
used as the encode_param argument of XieFloExportClientPhoto and
XieFloExportPhotomap (when the encode_tech argument is xieValEncodeG42D).

If insufficient memory is available, XieTecEncodeG42D returns NULL. To free the memory
allocated to this structure, use XFree.

CCITT-G42D is the CCITT group 4 two-dimensional encoding technique as defined by CCITT T.6,
"Facsimile Coding Schemes and Coding Control Functions for Group 4 Facsimile Apparatus".

If True, uncompressed will enable the use of the uncompressed-mode CCITT extension.
radiometric specifies that image ones will be encoded as white runs, or conversely, image zeros
will be encoded as white runs, if radiometric is False. encoded_order specifies the bit
order for the encoded data.  One of the following standard orientation values can be assigned to
encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567
Structures
XieTecEncodeG42D sets the structure field uncompressed to the value of the argument
uncompressed; the structure field radiometric to the value of the argument radiometric;
and the structure field encoded_order to the value of the argument encoded_order.

typedef unsigned XieOrientation;
typedef struct {
        Bool uncompressed;
        Bool radiometric;
        XieOrientation encoded_order;
} XieEncodeG42DParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieGetClientData
 XIElib - Technique Functions   XieTecEncodeServerChoice
Name
XieTecEncodeServerChoice - allocate and fill an XieEncodeServerChoiceParam structure
Syntax
XieEncodeServerChoiceParam *XieTecEncodeServerChoice (preference)
unsigned int preference;
Arguments
preference      Specifies a hint to help the server make its choice.
Returns
The XieEncodeServerChoiceParam structure.
Description
XieTecEncodeServerChoice allocates and returns a pointer to an
XieEncodeServerChoiceParam structure. The returned structure represents the list of
parameters required by the encode technique and may be used as the encode_param argument of
XieFloExportPhotomap (when the encode_tech argument is
xieValEncodeServerChoice).

If insufficient memory is available, XieTecEncodeServerChoice returns NULL. To free the
memory allocated to this structure, use XFree.

The server choice technique allows the server to choose an encode technique when exporting to a
photomap. A photomap is a server resource that can be used to store image data. preference
specifies an optional hint that can be provided to help the server make its choice, but the server is
not obligated to obey the hint. One of the following standard server choice preference values can be
assigned to preference:

xieValPreferDefault
xieValPreferSpace
xieValPreferTime

xieValPreferTime hints that retrieval performance is the desired metric, whereas
xieValPreferSpace indicates that frugal use of storage space is more important. Normally the
server choice technique must choose a lossless encode technique, but when data is received from an
adjacent upstream import element, it may choose to pass the import elements input data directly to
the photomap.
Structures
XieTecEncodeServerChoice sets the structure field preference to the value of the
argument preference.

typedef struct {
        unsigned int preference;
} XieEncodeServerChoiceParam;

/* Definitions for ServerChoice Preference Hints */
#define xieValPreferDefault     0
#define xieValPreferSpace       1
#define xieValPreferTime        2
See Also
XieFloExportPhotomap
 XIElib - Technique Functions   XieTecEncodeJPEGBaseline
Name
XieTecEncodeJPEGBaseline - allocate and fill an XieEncodeJPEGBaselineParam structure
Syntax
XieEncodeJPEGBaselineParam *XieTecEncodeJPEGBaseline (interleave,
band_order, horizontal_samples, vertical_samples,
q_table, q_size, ac_table, ac_size, dc_table, dc_size)
XieInterleave interleave;
XieOrientation band_order;
unsigned char horizontal_samples[3];
unsigned char vertical_samples[3];
char *q_table;
unsigned int q_size;
char *ac_table;
unsigned int ac_size;
char *dc_table;
unsigned int dc_size;
Arguments
interleave      Specifies how the image bands will be interleaved.
band_order      Specifies the order in which the image bands were originally encoded.
horizontal_samples      Specifies the horizontal sampling factor.
vertical_samples        Specifies the vertical sampling factor.
q_table Specifies the quantization table.
q_size  Specifies the number of elements in q_table.
ac_table        Specifies the AC Huffman table.
ac_size Specifies the number of elements in ac_table.
dc_table        Specifies the DC Huffman table.
dc_size Specifies the number of elements in dc_table.
Returns
The XieEncodeJPEGBaselineParam structure.
Description
XieTecEncodeJPEGBaseline allocates and returns a pointer to an
XieEncodeJPEGBaselineParam structure. The returned structure represents the list of
parameters required by the encode technique and may be used as the encode_param argument of
XieFloExportClientPhoto and XieFloExportPhotomap (when the encode_tech
argument is xieValEncodeJPEGBaseline).

If insufficient memory is available, XieTecEncodeJPEGBaseline returns NULL.
XieTecEncodeJPEGBaseline allocates memory for the structure fields q_table,
ac_table, and dc_table; to free the memory allocated to the structure
XieEncodeJPEGBaselineParam, use XieFreeEncodeJPEGBaseline.

JPEG-Baseline is baseline Huffman DCT encoding as defined by ISO DIS 10918-1 "Digital
Compression and Coding of Continuous-tone Still Images". A stream of JPEG Interchange Format
(JIF) data is produced: all tables, compressed data, and so on are embedded in the data stream, all
delineated by markers.

For optimal results, clients should ensure that the colorspace of triple band image data flowing into
ExportClientPhoto or ExportPhotomap, for encoding by the JPEGBaseline encoder, is YCbCr.

interleave determines whether all bands of a triple band image will be interleaved within a single
encoded stream or whether three separate encoded streams will be produced. One of the following
standard interleave values can be assigned to interleave:

xieValBandByPixel
xieValBandByPlane

For triple band data, band_order specifies the order in which the image bands were originally
encoded. One of the following standard orientation values can be assigned to band_order:

xieValLSFirst
xieValMSFirst

The least significant band of trichromatic data is the first band mentioned in the common name of the
colorspace: red is the least significant band of RGB data. band_order specifies whether this band
corresponds with the least significant or most significant image plane. Each plane is encoded from a
separate data stream:

band
LSFirst
MSFirst
0
Red band
Blue band
1
Green band
Green band
2
Blue band
Red band

The arguments horizontal_samples and vertical_samples are the horizontal and vertical
sampling factors. q_table is the quantization table. ac_table specifies the AC Huffman table
and dc_table specifies the DC Huffman table.

There may be one q_table per band or a single q_table shared between all bands. Generally
there is a single AC/DC pair of Huffman tables, but for triple band band-by-pixel data there may be
two pairs of tables (one for the luminance band and the other for the chromanance bands). If any table
is specified with zero length, it indicates that the server implementor is to supply that table (for
example, the example tables defined in ISO DIS 10918-1 "Digital Compression and Coding of
Continuous-tone Still Images").

The arguments interleave, band_order, horizontal_samples, and
vertical_samples are ignored for single band images, and horizontal_samples and
vertical_samples are always ignored if interleave is band-by-plane.
horizontal_samples and vertical_samples share the definitions and restrictions
stipulated for parameters Hi and Vi, respectively, that are specified in annexes A and B of ISO DIS
10918-1 "Digital Compression and Coding of Continuous-tone Still Images".
Structures
XieTecEncodeJPEGBaseline sets the structure field interleave to the value of the
argument interleave; the structure field band_order to the value of the argument
band_order; the structure field horizontal_sample to the values of the argument
horizontal_sample; the structure field vertical_sample to the values of the argument
vertical_sample; and the structure fields q_table, q_size, ac_table, ac_size,
dc_table, dc_size to the values of the arguments q_table, q_size, ac_table,
ac_size, dc_table, dc_size.

typedef unsigned XieOrientation;
typedef struct {
        XieInterleave interleave;
        XieOrientation band_order;
        unsigned char horizontal_samples[3];
        unsigned char vertical_samples[3];
        char *q_table;
        unsigned int q_size;
        char *ac_table;
        unsigned int ac_size;
        char *dc_table;
        unsigned int dc_size;
} XieEncodeJPEGBaselineParam;

/* Definitions for Interleave */
#define xieValBandByPixel       1
#define xieValBandByPlane       2

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieFreeEncodeJPEGBaseline,
XieFloConvertFromRGB, XieTecRGBToYCbCr, XieGetClientData
 XIElib - Technique Functions   XieTecEncodeJPEGLossless
Name
XieTecEncodeJPEGLossless - allocate and fill an XieEncodeJPEGLosslessParam structure
Syntax
XieEncodeJPEGLosslessParam *XieTecEncodeJPEGLossless (interleave,
band_order, predictor, table, table_size)
XieInterleave interleave;
XieOrientation band_order;
unsigned char predictor[3];
char *table;
unsigned int table_size;
Arguments
interleave      Specifies how the image bands will be interleaved.
band_order      Specifies the order in which the image bands were originally encoded.
predictor       Specifies the predictor selection value.
table   Specifies the lossless entropy encoding table.
table_size      Specifies the number of elements in table.
Returns
The XieEncodeJPEGLosslessParam structure.
Description
XieTecEncodeJPEGLossless allocates and returns a pointer to an
XieEncodeJPEGLosslessParam structure. The returned structure represents the list of
parameters required by the encode technique and may be used as the encode_param argument of
XieFloExportClientPhoto and XieFloExportPhotomap (when the encode_tech
argument is xieValEncodeJPEGLossless).

If insufficient memory is available, XieTecEncodeJPEGLossless returns NULL.
XieTecEncodeJPEGLossless allocates memory for the structure field table; to free the
memory allocated to the structure XieEncodeJPEGLosslessParam, use
XieFreeEncodeJPEGLossless.

JPEG-Lossless, corresponds to frames encoded using Huffman, predictive sequential lossless
encoding as defined by ISO DIS 10918-1 "Digital Compression and Coding of Continuous-tone Still
Images". A data stream of JPEG Interchange Format (JIF) data is returned: all tables, compressed
data, and so on are embedded in the data stream, all delineated by markers.
This technique is not available in the R6 sample implementation of XIE.


interleave determines whether all bands of a triple band image will be interleaved within a single
encoded stream or whether three separate encoded streams will be produced. One of the following
standard interleave values can be assigned to interleave:

xieValBandByPixel
xieValBandByPlane

For triple band data, band_order specifies the order in which the image bands were originally
encoded.  One of the following standard orientation values can be assigned to band_order:

xieValLSFirst
xieValMSFirst

The least significant band of trichromatic data is the first band mentioned in the common name of the
colorspace: red is the least significant band of RGB data. band_order specifies whether this band
corresponds with the least significant or most significant image plane. Each plane is encoded from a
separate data stream:

band
LSFirst
MSFirst
0
Red band
Blue band
1
Green band
Green band
2
Blue band
Red band

The arguments interleave and band_order are ignored for single band images.

predictor is the predictor selection value (one per band). table is the lossless entropy encoding
table (up to one per band). Specifying a table of length zero indicates that the server implementor
should supply a table (for example, the example tables defined in ISO DIS 10918-1 "Digital
Compression and Coding of Continuous-Tone Still Images").

Structures
XieTecEncodeJPEGLossless sets the structure field interleave to the value of the
argument interleave; the structure field band_order to the value of the argument
band_order; the structure field predictor to the values of the argument predictor; and the
structure fields table, table_size to the values of the arguments table, table_size.

typedef unsigned XieOrientation;
typedef struct {
        XieInterleave interleave;
        XieOrientation band_order;
        unsigned char predictor[3];
        char *table;
        unsigned int table_size;
} XieEncodeJPEGLosslessParam;
/* Definitions for Interleave */
#define xieValBandByPixel       1
#define xieValBandByPlane       2

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieGetClientData
 XIElib - Technique Functions   XieTecEncodeTIFF2
Name
XieTecEncodeTIFF2 - allocate and fill an XieEncodeTIFF2Param structure
Syntax
XieEncodeTIFF2Param *XieTecEncodeTIFF2 (encoded_order, radiometric)
XieOrientation encoded_order;
Bool radiometric;
Arguments
encoded_order   Specifies the bit order of the encoded data.
radiometric     Specifies how white runs are decoded.
Returns
The XieEncodeTIFF2Param structure.
Description
XieTecEncodeTIFF2 allocates and returns a pointer to an XieEncodeTIFF2Param structure.
The returned structure represents the list of parameters required by the encode technique and may be
used as the encode_param argument of XieFloExportClientPhoto and
XieFloExportPhotomap (when the encode_tech argument is xieValEncodeTIFF2).

If insufficient memory is available, XieTecEncodeTIFF2 returns NULL. To free the memory
allocated to this structure, use XFree.

TIFF-2 is modified Huffman compression as described in "TIFF Tag Image File Format", revision
6.0, draft 2, by Aldus Corporation (TIFF compression scheme 2).

radiometric specifies that image ones will be encoded as white runs, or conversely, image zeros
will be encoded as white runs, if radiometric is False. encoded_order specifies the bit
order for the encoded data. One of the following standard orientation values can be assigned to
encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567
Structures
XieTecEncodeTIFF2 sets the structure field encoded_order to the value of the argument
encoded_order; and the structure field radiometric to the value of the argument
radiometric.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation encoded_order;
        Bool radiometric;
} XieEncodeTIFF2Param;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieGetClientData
 XIElib - Technique Functions   XieTecEncodeTIFFPackBits
Name
XieTecEncodeTIFFPackBits - allocate and fill an XieEncodeTIFFPackBitsParam structure
Syntax
XieEncodeTIFFPackBitsParam *XieTecEncodeTIFFPackBits (encoded_order)
XieOrientation encoded_order;
Arguments
encoded_order   Specifies the bit order of the encoded data.
Returns
The XieEncodeTIFFPackBitsParam structure.
Description
XieTecEncodeTIFFPackBits allocates and returns a pointer to an
XieEncodeTIFFPackBitsParam structure. The returned structure represents the list of
parameters required by the encode technique and may be used as the encode_param argument of
XieFloExportClientPhoto and XieFloExportPhotomap (when the encode_tech
argument is xieValEncodeTIFFPackBits).

If insufficient memory is available, XieTecEncodeTIFFPackBits returns NULL. To free the
memory allocated to this structure, use XFree.

TIFF-PackBits is byte-oriented run-length encoding as described in "TIFF Tag Image File Format",
revision 6.0, draft 2, by Aldus Corporation  (TIFF compression scheme 32773).

encoded_order specifies the bit order of the encoded data. One of the following standard
orientation values can be assigned to encoded_order:

xieValLSFirst
xieValMSFirst

The following table shows the encoded bit order of two bytes (within each byte the first encoded bit is
0, and the last is bit 7):

LSFirst
MSFirst
76543210  76543210
01234567  01234567
Structures
XieTecEncodeTIFFPackBits sets the structure field encoded_order to the value of the
argument encoded_order.

typedef unsigned XieOrientation;
typedef struct {
        XieOrientation encoded_order;
} XieEncodeTIFFPackBitsParam;

/* Definitions of Orientation Types */
#define xieValLSFirst   1
#define xieValMSFirst   2
See Also
XieFloExportClientPhoto, XieFloExportPhotomap, XieGetClientData
 XIElib - Technique Functions   XieTecGeomAntialiasByArea
Name
XieTecGeomAntialiasByArea - allocate and fill an XieGeomAntialiasByAreaParam structure
Syntax
XieGeomAntialiasByAreaParam *XieTecGeomAntialiasByArea (simple)
int simple;
Arguments
simple  Specifies the approximation form to use.
Returns
The XieGeomAntialiasByAreaParam structure.
Description
XieTecGeomAntialiasByArea allocates and returns a pointer to an
XieGeomAntialiasByAreaParam structure. The returned structure represents the list of
parameters required by the geometry technique and may be used as the sample_param argument of
XieFloGeometry (when the sample_tech argument is xieValGeomAntialiasByArea).

If insufficient memory is available, XieTecGeomAntialiasByArea returns NULL. To free the
memory allocated to this structure, use XFree.

Antialiasing techniques incorporate information from an "area" of pixels in the input image in order
to produce each output pixel. This implies that line dropouts and other artifacts will occur less often,
and the output image may have markedly better resemblance to the input image. The technique
AntialiasByArea computes the output image by assigning to each output pixel the weighted average of
the intensity values of input pixels that fall within its area. That is, the four corners of the output
pixel are projected back onto the input image.

If simple is zero (0), the size and shape of the "area" are determined by the parameters of the
geometric transformation. The boundaries of the "area" may not fall on pixel boundaries and, in the
case of nonorthogonal rotation of the image, "area" may not be rectangular. Partial input pixel values
may have to be calculated: the antialias-by-area technique preserves shape but can be very slow
computationally.

Because of the computational complexity of this method, two approximations are supported. If
simple is nonzero, the pixels covered by the projected area will be averaged without regard to the
relative amount of area that they contain: if they are touched by the area, they are included in a simple
average. If simple is set to N, with N odd and greater than one (3,5,7, ...), then only the center point
of the output pixel is projected, and a simple average is taken of an N by N window centered on the
projection. For best results, N should correspond roughly to the amount of scaling that will be done.

Structures
XieTecGeomAntialiasByArea sets the structure field simple to the value of the argument
simple.

typedef struct {
        int simple;
} XieGeomAntialiasByAreaParam;
See Also
XieFloGeometry
 XIElib - Technique Functions   XieTecGeomAntialiasByLowpass
Name
XieTecGeomAntialiasByLowpass - allocate and fill an XieGeomAntialiasByLowpassParam
structure
Syntax
XieGeomAntialiasByLowpassParam *XieTecGeomAntialiasByLowpass
(kernel_size)
int kernel_size;
Arguments
kernel_size     Specifies the size of the image kernel.
Returns
The XieGeomAntialiasByLowpassParam structure.
Description
XieTecGeomAntialiasByLowpass allocates and returns a pointer to an
XieGeomAntialiasByLowpassParam structure. The returned structure represents the list of
parameters required by the geometry technique and may be used as the sample_param argument of
XieFloGeometry (when the sample_tech argument is
xieValGeomAntialiasByLowpass).

If insufficient memory is available, XieTecGeomAntialiasByLowpass returns NULL. To free
the memory allocated to this structure, use XFree.

Antialiasing techniques incorporate information from an "area" of pixels in the input image in order
to produce each output pixel. This implies that line dropouts and other artifacts will occur less often,
and the output image may have markedly better resemblance to the input image. The technique
AntialiasByLowpass represents an approximation to antialias-by-area that can be faster, yet provides
similar results. First, a low-pass filter is applied by passing an nxn boxcar kernel over the original
input image. Output pixel values are then derived using a nearest neighbor sampling method that
selects the value of the input pixel in the upper-left corner of the area mapped back from the output
pixel.

The user is allowed to select the size of the image kernel via the kernel_size parameter. For best
results, kernel_size should be chosen to correspond roughly to the amount of scaling that will be
done. Note that the server chooses the best kernel for the appropriate size; the values used in the
kernel are not alterable by the client application. Clients wishing to specify the kernel in more detail
should use the convolve technique directly.
Structures
XieTecGeomAntialiasByLowpass sets the structure field kernel_size to the value of the
argument kernel_size.

typedef struct {
        int kernel_size;
} XieGeomAntialiasByLowpassParam;
See Also
XieFloGeometry, XieFloConvolve, XieTecGeomAntialiasByArea
 XIElib - Technique Functions   XieTecGeomGaussian
Name
XieTecGeomGaussian - allocate and fill an XieGeomGaussianParam structure
Syntax
XieGeomGaussianParam *XieTecGeomGaussian (sigma, normalize, radius,
simple)
double sigma;
double normalize;
unsigned int radius;
Bool simple;
Arguments
sigma   Specifies the drop-off rate.
normalize       Specifies a normalization constant.
radius  Specifies the extent of computation.
simple  Specifies the approximation form to use.
Returns
The XieGeomGaussianParam structure.
Description
XieTecGeomGaussian allocates and returns a pointer to an XieGeomGaussianParam
structure. The returned structure represents the list of parameters required by the geometry technique
and may be used as the sample_param argument of XieFloGeometry (when the
sample_tech argument is xieValGeomGaussian).

If insufficient memory is available, XieTecGeomGaussian returns NULL. To free the memory
allocated to this structure, use XFree.

A Geometry element can be visualized as stepping through each possible output pixel location in turn,
and computing the location from which to obtain each input pixel value. Each pixel (x',y') in the
output image is mapped to the coordinate location (x,y) in src by:



It is not unusual that the input location (x,y) so derived will be nonintegral and will not correspond
exactly to a single pixel in the input image.

From sampling theory, a bandwidth limited continuous input image can be recovered perfectly (under
certain conditions) from its sampled output by computing the convolution:



Here I(x,y) is the continuous image, i(m,n) the discrete sampled image, and h(u,v) is the impulse
response function for an appropriate low-pass filter. The specific form of h(u,v) for a Gaussian
impulse response function is given by:



The   term is called the "normalization constant" and may be altered using the normalize
parameter. The suggested value for * (sigma, the drop-off rate) is 1. Note that all technique
parameters must be chosen in concert

radius defines the extent of computation. A suggested value for radius is one, that is, only pixels
within a distance of one in either the x or y direction are involved in the calculation.

For computational convenience, a simplified form of Gaussian interpolation is provided. If simple
is True, the impulse-response function h(u,v) is:



The normalization factor N is defined by normalize. As with true Gaussian interpolation, the
radius parameter is used to determine the number of pixels involved in the computation.
Structures
XieTecGeomGaussian sets the structure field sigma to the value of the argument sigma; the
structure field normalize to the value of the argument normalize; the structure field radius to
the value of the argument radius; and the structure field simple to the value of the argument
simple.

typedef struct {
        float sigma;
        float normalize;
        unsigned int radius;
        Bool simple;
} XieGeomGaussianParam;
See Also
XieFloGeometry
 XIElib - Technique Functions   XieTecGeomNearestNeighbor
Name
XieTecGeomNearestNeighbor - allocate and fill an XieGeomNearestNeighborParam structure
Syntax
XieGeomNearestNeighborParam *XieTecGeomNearestNeighbor (modify)
    unsigned int modify;
Arguments
modify  Specifies technique behavior on even boundaries.
Returns
The XieGeomNearestNeighborParam structure.
Description
XieTecGeomNearestNeighbor allocates and returns a pointer to an
XieGeomNearestNeighborParam structure. The returned structure represents the list of
parameters required by the geometry technique and may be used as the sample_param argument of
XieFloGeometry (when the sample_tech argument is xieValGeomNearestNeighbor).

If insufficient memory is available, XieTecGeomNearestNeighbor returns NULL. To free the
memory allocated to this structure, use XFree.

A Geometry element can be visualized as stepping through each possible output pixel location in turn,
and computing the location from which to obtain each input pixel value. Each pixel (x',y') in the
output image is mapped to the coordinate location (x,y) in src by:



It is not unusual that the input location (x,y) so derived will be nonintegral and will not correspond
exactly to a single pixel in the input image.

To illustrate NearestNeighbor technique, assume that the pixel grid locations P, Q, R, and S are
integral. Pixel location X = (x,y)T, obtained from the mapping equation above, differs from P by
fractional amounts s in the x direction and t in the y direction.



Let I(P) be the value of the input image at coordinate P, if P is within the image extent. Otherwise, let
I(P) be constant, where constant is the pixel value passed to the Geometry element. A value of
I(X) must be estimated from I(P), I(Q), I(R), and I(S). In nearest-neighbor sampling, we simply
choose the image value from the discrete location closest to X. Thus,

if s < 1/2, t < 1/2, set I(X) = I(P),
if s > 1/2, t < 1/2, set I(X) = I(Q),
if s > 1/2, t > 1/2, set I(X) = I(R),
if s < 1/2, t > 1/2, set I(X) = I(S).

The behavior on even boundaries (s = 1/2 or t = 1/2) is determined by the modify parameter. One of
the standard nearest neighbor modify values can be assigned to modify:

xieValFavorDown
xieValFavorUp
xieValRoundNW
xieValRoundNE
xieValRoundSE
xieValRoundSW


If modify is xieValFavorDown, all less than signs in the above are replaced with less than
or equal signs. Thus, P would win all ties, S and Q would lose to P but win over R, and R would
lose all ties. If modify is xieValFavorUp, then all greater than signs would be replaced with
greater than or equals, and the opposite behavior would occur. Four additional options are provided.
The xieValRoundxx options will always choose a specific integral pixel grid location; these are
not strictly nearest neighbor algorithms but are available for computational/filtering convenience.
Structures
XieTecGeomNearestNeighbor sets the structure field modify to the value of the argument
modify.

typedef struct {
        unsigned int modify;
} XieGeomNearestNeighborParam;
/* Definitions of NearestNeighbor Modify */
#define xieValFavorDown 1
#define xieValFavorUp   2
#define xieValRoundNW   3
#define xieValRoundNE   4
#define xieValRoundSE   5
#define xieValRoundSW   6
See Also
XieFloGeometry
 XIElib - Technique Functions   XieTecHistogramGaussian
Name
XieTecHistogramGaussian - allocate and fill an XieHistogramGaussianParam structure
Syntax
XieHistogramGaussianParam *XieTecHistogramGaussian (mean, sigma)
double mean;
double sigma;
Arguments
mean    Specifies the center of the Gaussian probability density function.
sigma   Specifies the "spread" of the Gaussian probability density function.
Returns
The XieHistogramGaussianParam structure.
Description
XieTecHistogramGaussian allocates and returns a pointer to an
XieHistogramGaussianParam structure. The returned structure represents the list of
parameters required by the match-histogram shape technique and may be used as the shape_param
argument of XieFloMatchHistogram (when the shape argument is
xieValHistogramGaussian).

If insufficient memory is available, XieTecHistogramGaussian returns NULL. To free the
memory allocated to this structure, use XFree.

The Gaussian match-histogram shape technique specifies that the output image is to have a histogram
that approximates a Gaussian probability density. The supplied parameters are used to generate a
Gaussian probability density function centered around the mean level with a spread specified by
sigma:



Structures
XieTecHistogramGaussian sets the structure field mean to the value of the argument mean;
and the structure field sigma to the value of the argument sigma.

typedef struct {
        float mean;
        float sigma;
} XieHistogramGaussianParam;
See Also
XieFloMatchHistogram
 XIElib - Technique Functions   XieTecHistogramHyperbolic
Name
XieTecHistogramHyperbolic - allocate and fill an XieHistogramHyperbolicParam structure
Syntax
XieHistogramHyperbolicParam *XieTecHistogramHyperbolic (constant,
shape_factor)
double constant;
Bool shape_factor;
Arguments
constant        Specifies a value used to generate a hyperbolic probability density
function
shape_factor    Specifies the relationship between the histogram shape and image
levels.
Returns
The XieHistogramHyperbolicParam structure.
Description
XieTecHistogramHyperbolic allocates and returns a pointer to an
XieHistogramHyperbolicParam structure. The returned structure represents the list of
parameters required by the match-histogram shape technique and may be used as the shape_param
argument of XieFloMatchHistogram (when the shape argument is
xieValHistogramHyperbolic).

If insufficient memory is available, XieTecHistogramHyperbolic returns NULL. To free the
memory allocated to this structure, use XFree.

The hyperbolic match-histogram shape technique specifies that the output image is to have a
histogram that approximates a hyperbolic probability density.

constant is used to generate a hyperbolic probability density function:



shape_factor should be specified as False if the histogram shape represents decreasing values
for higher levels or True if the shape represents increasing values for higher levels.
Structures
XieTecHistogramHyperbolic sets the structure field constant to the value of the argument
constant; and the structure field shape_factor to the value of the argument shape_factor.

typedef struct {
        float constant;
        Bool shape_factor;
} XieHistogramHyperbolicParam;
See Also
XieFloMatchHistogram
 XIElib - Technique Functions   XieTecWhiteAdjustCIELabShift
Name
XieTecWhiteAdjustCIELabShift - allocate and fill an XieWhiteAdjustCIELabShiftParam
structure
Syntax
XieWhiteAdjustCIELabShiftParam *XieTecWhiteAdjustCIELabShift
(white_point)
XieConstant white_point;
Arguments
white_point     Specifies the white point of the (source or output) data.
Returns
The XieWhiteAdjustCIELabShiftParam structure.
Description
XieTecWhiteAdjustCIELabShift allocates and returns a pointer to an
XieWhiteAdjustCIELabShiftParam structure. The returned structure represents the list of
parameters required by the WhiteAdjust technique and may be used as the white_adjust_param
argument of XieTecRGBToCIELab, XieTecRGBToCIEXYZ, XieTecCIELabToRGB, and
XieTecCIEXYZToRGB (when the white_adjust_tech argument is
xieValWhiteAdjustCIELabShift).

If insufficient memory is available, XieTecWhiteAdjustCIELabShift returns NULL. To free
the memory allocated to this structure, use XFree.

White point correction can be used to ensure that white "looks" white, or it can be used to change the
overall tint of an image.

The CIELabShift WhiteAdjust technique specifies that white point correction is to be accomplished
by adding the white point displacement to the ab plane in the CIELab colorspace. The
white_point is specified using CIEXYZ encodings. If the WhiteAdjust technique is used with a
color conversion technique that converts from RGB, white_point specifies the desired white point
of the output data; if the conversion is to RGB, white_point specifies the white point of the source
data.
Structures
XieTecWhiteAdjustCIELabShift sets the structure field white_point to the value of the
argument white_point.

typedef float XieConstant[3];
typedef unsigned XieWhiteAdjustTechnique;
typedef struct {
        XieConstant white_point;
} XieWhiteAdjustCIELabShiftParam;
See Also
XieTecRGBToCIELab, XieTecRGBToCIEXYZ, XieTecCIELabToRGB, XieTecCIEXYZToRGB
 XIElib - Free Functions        XieFreeTechniques
Name
XieFreeTechniques - free memory allocated for a list of techniques
Syntax
void XieFreeTechniques (techs, count)
XieTechnique *techs;
unsigned int count;
Arguments
techs   Specifies the list of techniques to be freed.
count   Specifies the number of items in the list of techniques to be freed.
Description
XieFreeTechniques frees the memory previously allocated for techs. Care should be taken
that the argument pair techs/count match an argument pair techniques_ret/
ntechniques_ret returned from XieQueryTechniques.

See XieQueryTechniques for a description of the XieTechnique structure.
Structures
typedef unsigned XieTechniqueGroup;
typedef struct {
        Bool needs_param;
        XieTechniqueGroup group;
        unsigned int number;
        unsigned int speed;
        char *name;
} XieTechnique;
See Also
 XieQueryTechniques
 XIElib - Free Functions        XieFreePhotofloGraph
Name
XieFreePhotofloGraph - free memory allocated for an array of XiePhotoElement structures
Syntax
void XieFreePhotofloGraph (elements, count)
XiePhotoElement *elements;
unsigned int count;
Arguments
elements        Specifies the array of XiePhotoElement structures to be freed.
count   Specifies the number of XiePhotoElement structures in the array.
Description
XieFreePhotofloGraph frees the specified array of XiePhotoElement structures.

Care should be taken that the argument pair elements/count match a returned value (an array of
XiePhotoElement structures) and argument count from a call to
XieAllocatePhotofloGraph.

Technique parameters are not freed by using XieFreePhotofloGraph. Most of the technique
parameters, with the exception of the JPEG baseline and JPEG lossless encode techniques, which are
allocated using XIElib convenience functions are freed using XFree. This is so the client can reuse
technique parameters between photoflos.
Structures
typedef struct {
        int elemType;
        /* union of ALL element types */
        union {
                ...
                ...
        } data;
} XiePhotoElement;
See Also
XieAllocatePhotofloGraph, XieCreatePhotoflo, XieExecutePhotoflo, XieExecuteImmediate
 XIElib - Free Functions        XieFreeEncodeJPEGBaseline
Name
XieFreeEncodeJPEGBaseline - free the memory allocated to the structure
XieEncodeJPEGBaselineParam
Syntax
void XieFreeEncodeJPEGBaseline (param)
XieEncodeJPEGBaselineParam *param
Arguments
param   Specifies a pointer to the structure that is to be freed.
Description
XieFreeEncodeJPEGBaseline (rather than XFree) should be used to free the memory
allocated by XieTecEncodeJPEGBaseline.
Structures
typedef struct {
        XieInterleave interleave;
        XieOrientation band_order;
        unsigned char horizontal_samples[3];
        unsigned char vertical_samples[3];
        char *q_table;
        unsigned int q_size;
        char *ac_table;
        unsigned int ac_size;
        char *dc_table;
        unsigned int dc_size;
} XieEncodeJPEGBaselineParam;
See Also
XieTecEncodeJPEGBaseline
 XIElib - Free Functions        XieFreeEncodeJPEGLossless
Name
XieFreeEncodeJPEGLossless - free the memory allocated to the structure
XieEncodeJPEGLosslessParam
Syntax
void XieFreeEncodeJPEGLossless (param)
XieEncodeJPEGLosslessParam *param;
Arguments
param   Specifies a pointer to the structure that is to be freed.
Description
XieFreeEncodeJPEGLossless (rather than XFree) should be used to free the memory
allocated by XieTecEncodeJPEGLossless.

Note that the JPEG Lossless technique is not available in the R6 sample implementation of XIE.
Structures
typedef struct {
        XieInterleave interleave;
        XieOrientation band_order;
        unsigned char predictor[3];
        char *table;
        unsigned int table_size;
} XieEncodeJPEGLosslessParam;
See Also
XieTecEncodeJPEGLossless
 XIElib - Free Functions        XieFreePasteUpTiles
Name
XieFreePasteUpTiles - free the memory allocated to the tiles field of a PasteUp structure
Syntax
void XieFreePasteUpTiles (element)
XiePhotoElement *element;
Arguments
element Specifies the XiePhotoElement structure to use.
Description
XieFreePasteUpTiles frees the memory allocated to the tiles field in the specified
PasteUp member structure; after the memory has been freed, the field value is set to NULL.
Structures
typedef struct {
        int elemType;
        union {
                ...
                struct {
                        unsigned int width;
                        unsigned int height;
                        XieConstant constant;
                        XieTile *tiles;
                        unsigned int tile_count;
                } PasteUp;
                ...
        } data;
} XiePhotoElement;
See Also
XieFloPasteUp

 XIElib Events  ColorAlloc
Description
The client is notified that a ConvertToIndex element has completed color allocation, but has produced
a result of lesser fidelity than was requested using the technique that was specified for the
ConvertToIndex element.

The structure fields name_space, flo_id, src, and elem_type identify the photoflo and
specific ConvertToIndex element from which the ColorAlloc event originated. The structure field
time is the server time when the ColorAlloc event occurred, in milliseconds. The structure field
color_list is the color list resource that received the allocated colors. The structure field
color_alloc_technique is the ColorAlloc technique specified to the ConvertToIndex element.
The structure field color_alloc_data can be used for other information that is specific to the
ColorAlloc technique.
Structures
/* ColorAlloc Event Code */
#define xieEvnNoColorAlloc      0

typedef struct {
        int type;
        unsigned long serial;
        Bool send_event;
        Display *display;
        unsigned long name_space;
        Time time;
        unsigned long flo_id;
        XiePhototag src;
        unsigned int elem_type;
        XieColorList color_list;
        XieColorAllocTechnique color_alloc_technique;
        unsigned long color_alloc_data;
} XieColorAllocEvent;
See Also
XieFloConvertToIndex, XieTecColorAllocAll
 XIElib Events  DecodeNotify
Description
A DecodeNotify event notifies the client that anomalies were encountered while decoding a
compressed image (see the notify arguments of XieFloImportClientPhoto and
XieFloImportPhotomap). Either an error has been encountered while decoding an image, or the
image data received does not satisfy the expected dimensions.

The structure fields name_space, flo_id, src, and elem_type identify the photoflo and
element from which the DecodeNotify event originated. The structure field time is the server
time when the DecodeNotify event occurred, in milliseconds. The structure field band_number
associates the event with a specific band of the image. The structure field decode_technique is
the Decode technique being used. The structure fields width and height are the dimensions
discovered while decoding the data. The structure field aborted is True if decoding was aborted,
or False if recovery was possible.

Recovery from a decode error may result in some missing or garbled image data. This may also cause
the height of the decoded data to be less than was expected. If the structure fields width or height
do not match the width and height specified to XieFloImportClientPhoto, the image data is
clipped or padded (with zeros), as required, to enforce the XieFloImportClientPhoto
specified dimensions.
Structures
/* DecodeNotify Event Code */
#define xieEvnNoDecodeNotify    1

typedef struct {
        int type;
        unsigned long serial;
        Bool send_event;
        Display *display;
        unsigned long name_space;
        Time time;
        unsigned long flo_id;
        XiePhototag src;
        unsigned int elem_type;
        XieDecodeTechnique decode_technique;
        Bool aborted;
        unsigned int band_number;
        unsigned long width;
        unsigned long height;
} XieDecodeNotifyEvent;
See Also
XieFloImportClientPhoto, XieFloImportPhotomap
 XIElib Events  ExportAvailable
Description
The client is notified that an ExportClient element has data available (see the notify argument of
the applicable XieFloExportClient... function). If notify was specified as
xieValFirstData, this event will be sent only the first time data become available from the
ExportClient element. Otherwise (that is, xieValNewData was specified), this event will be
generated each time the amount of data available changes from zero to nonzero.

The structure fields name_space, flo_id, src, and elem_type identify the photoflo and
specific ExportClient element from which the ExportAvailable event originated. The structure
field time is the server time when the ExportAvailable event occurred, in milliseconds. The
structure field band_number associates the event with a specific band of the image or LUT. The
structure field data is information specific to elem_type (for example, the number of LUT
entries or ROI rectangles available).

Where there is a single ExportClient element, the client can just read bytes or be event-driven. For
photoflos containing multiple ExportClient elements, the client should be event-driven.
Structures
/* ExportAvailable Event Code */
#define xieEvnNoExportAvailable 2

typedef struct {
        int type;
        unsigned long serial;
        Bool send_event;
        Display *display;
        unsigned long name_space;
        Time time;
        unsigned long flo_id;
        XiePhototag src;
        unsigned int elem_type;
        unsigned int band_number;
        unsigned long data[3];
} XieExportAvailableEvent;
See Also
XieFloExportClientHistogram, XieFloExportClientLUT, XieFloExportClientPhoto,
XieFloExportClientROI
 XIElib Events  ImportObscured
Description
The client is notified when an ImportDrawable or ImportDrawablePlane element encounters obscured
regions in a Window that cannot be retrieved from backing store (see the notify argument of the
import element routine). A separate ImportObscured event is returned for each affected region.

The structure fields name_space, flo_id, and src identify the photoflo and the specific import
element from which the ImportObscured event originated. The structure field time is the server
time when the ImportObscured event occurred, in milliseconds. The structure field window
identifies the Window. The obscured region of the window is specified by the structure fields x, y,
width, and height.

Note: image data within obscured regions will be populated with the fill argument supplied to the
import element.
Structures
/* ImportObscured Event Code */
#define xieEvnNoImportObscured  3

typedef struct {
        int type;
        unsigned long serial;
        Bool send_event;
        Display *display;
        unsigned long name_space;
        Time time;
        unsigned long flo_id;
        XiePhototag src;
        unsigned int elem_type;
        Window window;
        int x;
        int y;
        unsigned int width;
        unsigned int height;
} XieImportObscuredEvent;
See Also
XieFloImportDrawable, XieFloImportDrawablePlane
 XIElib Events  PhotofloDone
Description
A PhotofloDone event notifies the client that a photoflo has left the active state. It is enabled by
the notify argument of XieExecutePhotoflo or XieExecuteImmediate.

The photoflo from which the PhotofloDone event originated is identified by the structure fields
name_space and flo_id. The structure field time is the server time when the PhotofloDone
event occurred, in milliseconds. The reason the photoflo left the active state is indicated by the
structure field type.

If the Photoflo terminated because of an error condition, the details concerning the error have
preceded this event in an error message.
Structures
/* PhotofloDone Event Code */
#define xieEvnNoPhotofloDone    4

typedef struct {
        int type;
        unsigned long serial;
        Bool send_event;
        Display *display;
        unsigned long name_space;
        Time time;
        unsigned long flo_id;
} XiePhotofloDoneEvent;
See Also
XieExecuteImmediate, XieExecutePhotoflo

 XIElib Errors  Resource Errors
The following error codes are allocated from the extension error space to provide for the errors
returned by XIE:

Error   Cause
xieErrNoColorlist       The value for a color_list argument does not name a defined
color list.
xieErrNoLUT     The value for a lut argument does not name a defined LUT.
xieErrNoPhotoflo        The value for a photoflo argument does not name a defined
photoflo.
xieErrNoPhotomap        The value for a photomap argument does not name a defined
photomap.
xieErrNoPhotospace      The value for a photospace argument does not name a defined
photospace.
xieErrNoROI     The value for a roi argument does not name a defined ROI.
xieErrNoFlo     An error has been detected while defining, executing, or accessing a
photoflo (see Photoflo Errors).

XIE also uses the core protocol BadAccess, BadAlloc, BadIDChoice, BadLength, BadRequest, and
BadValue errors.
 XIElib Errors  Photoflo Errors
If an error is detected while defining, executing, or accessing a photoflo, an xieErrNoFlo...
error is returned. This single error code is allocated from the extension error space for all photoflo
related errors. The following subcodes are defined to provide the details of the error:

Error   Cause
xieErrNoFloAccess       Attempt to execute, modify, or redefine an active photoflo or
attempt to Get/Put client data from/to an inactive photoflo.
xieErrNoFloAlloc        Insufficient resources (for example, memory).
xieErrNoFloColormap     An unknown Colormap has been specified.
xieErrNoFloColorList    An unknown color list has been specified.
xieErrNoFloDomain       Invalid domain phototag:
 - source data is not a list-of-rectangles or control-plane or
 - specified nonzero on a DIS server.
xieErrNoFloDrawable     An unknown Drawable has been specified.
xieErrNoFloElement      An unknown element type has been specified, or
invalid element type for request, or
attempt to change or add an element type.
xieErrNoFloGC   An unknown GContext has been specified.
xieErrNoFloID   Invalid executable:
 - an unknown photoflo has been specified or
 - an unknown photospace has been specified.
xieErrNoFloLength       An element was received with the incorrect number of bytes.
xieErrNoFloLUT  An unknown LUT has been specified.
xieErrNoFloMatch        Some argument or pair of arguments has the correct type and range,
but it fails to match in some other way required by the element.
xieErrNoFloOperator     An unknown operator has been specified.
xieErrNoFloPhotomap     An unknown photomap has been specified.
xieErrNoFloROI  An unknown ROI has been specified.
xieErrNoFloSource       An invalid phototag has been specified:
 - zero, but a phototag is required, or
 - downstream from the particular element, or
 - beyond the bounds of the photoflo.
xieErrNoFloTechnique    An unknown technique has been specified , or
invalid technique specific-parameters have been specified,  or
the wrong number of technique-specific parameters have been given.
xieErrNoFloValue        Some numeric value falls outside of the range of values accepted by
the element.
xieErrNoFloImplementation       Some aspect of a request is not implemented by the server:
the client should be prepared to receive and handle this error.


Structures
/* Definition of Error Codes */
#define xieErrNoColorList       0
#define xieErrNoLUT     1
#define xieErrNoPhotoflo        2
#define xieErrNoPhotomap        3
#define xieErrNoPhotospace      4
#define xieErrNoROI     5
#define xieErrNoFlo     6

/* Definitions of Flo Error (Sub-) Codes */
#define xieErrNoFloAccess       1
#define xieErrNoFloAlloc        2
#define xieErrNoFloColormap     3
#define xieErrNoFloColorList    4
#define xieErrNoFloDomain       5
#define xieErrNoFloDrawable     6
#define xieErrNoFloElement      7
#define xieErrNoFloGC   8
#define xieErrNoFloID   9
#define xieErrNoFloLength       10
#define xieErrNoFloLUT  11
#define xieErrNoFloMatch        12
#define xieErrNoFloOperator     13
#define xieErrNoFloPhotomap     14
#define xieErrNoFloROI  15
#define xieErrNoFloSource       16
#define xieErrNoFloTechnique    17
#define xieErrNoFloValue        18
#define xieErrNoFloImplementation       19

XIElib          40

XIElib          Events-5

XIElib          Errors-3