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image.c
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2000-01-07
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/* $Id: image.c,v 1.13 1999/11/08 07:36:44 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef PC_HEADER
#include "all.h"
#else
#ifndef XFree86Server
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#else
#include "GL/xf86glx.h"
#endif
#include "context.h"
#include "image.h"
#include "macros.h"
#include "mmath.h"
#include "pixel.h"
#include "types.h"
#endif
/*
* Flip the 8 bits in each byte of the given array.
*/
void gl_flip_bytes( GLubyte *p, GLuint n )
{
register GLuint i, a, b;
for (i=0;i<n;i++) {
b = (GLuint) p[i];
a = ((b & 0x01) << 7) |
((b & 0x02) << 5) |
((b & 0x04) << 3) |
((b & 0x08) << 1) |
((b & 0x10) >> 1) |
((b & 0x20) >> 3) |
((b & 0x40) >> 5) |
((b & 0x80) >> 7);
p[i] = (GLubyte) a;
}
}
/*
* Flip the order of the 2 bytes in each word in the given array.
*/
void gl_swap2( GLushort *p, GLuint n )
{
register GLuint i;
for (i=0;i<n;i++) {
p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);
}
}
/*
* Flip the order of the 4 bytes in each word in the given array.
*/
void gl_swap4( GLuint *p, GLuint n )
{
register GLuint i, a, b;
for (i=0;i<n;i++) {
b = p[i];
a = (b >> 24)
| ((b >> 8) & 0xff00)
| ((b << 8) & 0xff0000)
| ((b << 24) & 0xff000000);
p[i] = a;
}
}
/*
* Return the size, in bytes, of the given GL datatype.
* Return 0 if GL_BITMAP.
* Return -1 if invalid type enum.
*/
GLint gl_sizeof_type( GLenum type )
{
switch (type) {
case GL_BITMAP:
return 0;
case GL_UNSIGNED_BYTE:
return sizeof(GLubyte);
case GL_BYTE:
return sizeof(GLbyte);
case GL_UNSIGNED_SHORT:
return sizeof(GLushort);
case GL_SHORT:
return sizeof(GLshort);
case GL_UNSIGNED_INT:
return sizeof(GLuint);
case GL_INT:
return sizeof(GLint);
case GL_FLOAT:
return sizeof(GLfloat);
default:
return -1;
}
}
/*
* Same as gl_sizeof_packed_type() but we also accept the
* packed pixel format datatypes.
*/
GLint gl_sizeof_packed_type( GLenum type )
{
switch (type) {
case GL_BITMAP:
return 0;
case GL_UNSIGNED_BYTE:
return sizeof(GLubyte);
case GL_BYTE:
return sizeof(GLbyte);
case GL_UNSIGNED_SHORT:
return sizeof(GLushort);
case GL_SHORT:
return sizeof(GLshort);
case GL_UNSIGNED_INT:
return sizeof(GLuint);
case GL_INT:
return sizeof(GLint);
case GL_FLOAT:
return sizeof(GLfloat);
case GL_UNSIGNED_BYTE_3_3_2:
return sizeof(GLubyte);
case GL_UNSIGNED_BYTE_2_3_3_REV:
return sizeof(GLubyte);
case GL_UNSIGNED_SHORT_5_6_5:
return sizeof(GLshort);
case GL_UNSIGNED_SHORT_5_6_5_REV:
return sizeof(GLshort);
case GL_UNSIGNED_SHORT_4_4_4_4:
return sizeof(GLshort);
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
return sizeof(GLshort);
case GL_UNSIGNED_SHORT_5_5_5_1:
return sizeof(GLshort);
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
return sizeof(GLshort);
case GL_UNSIGNED_INT_8_8_8_8:
return sizeof(GLuint);
case GL_UNSIGNED_INT_8_8_8_8_REV:
return sizeof(GLuint);
case GL_UNSIGNED_INT_10_10_10_2:
return sizeof(GLuint);
case GL_UNSIGNED_INT_2_10_10_10_REV:
return sizeof(GLuint);
default:
return -1;
}
}
/*
* Return the number of components in a GL enum pixel type.
* Return -1 if bad format.
*/
GLint gl_components_in_format( GLenum format )
{
switch (format) {
case GL_COLOR_INDEX:
case GL_COLOR_INDEX1_EXT:
case GL_COLOR_INDEX2_EXT:
case GL_COLOR_INDEX4_EXT:
case GL_COLOR_INDEX8_EXT:
case GL_COLOR_INDEX12_EXT:
case GL_COLOR_INDEX16_EXT:
case GL_STENCIL_INDEX:
case GL_DEPTH_COMPONENT:
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_ALPHA:
case GL_LUMINANCE:
case GL_INTENSITY:
return 1;
case GL_LUMINANCE_ALPHA:
return 2;
case GL_RGB:
return 3;
case GL_RGBA:
return 4;
case GL_BGR:
return 3;
case GL_BGRA:
return 4;
case GL_ABGR_EXT:
return 4;
default:
return -1;
}
}
/*
* Return bytes per pixel for given format and type
* Return -1 if bad format or type.
*/
GLint gl_bytes_per_pixel( GLenum format, GLenum type )
{
GLint comps = gl_components_in_format( format );
if (comps < 0)
return -1;
switch (type) {
case GL_BITMAP:
return 0; /* special case */
case GL_BYTE:
case GL_UNSIGNED_BYTE:
return comps * sizeof(GLubyte);
case GL_SHORT:
case GL_UNSIGNED_SHORT:
return comps * sizeof(GLshort);
case GL_INT:
case GL_UNSIGNED_INT:
return comps * sizeof(GLint);
case GL_FLOAT:
return comps * sizeof(GLfloat);
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
if (format == GL_RGB || format == GL_BGR)
return sizeof(GLubyte);
else
return -1; /* error */
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
if (format == GL_RGB || format == GL_BGR)
return sizeof(GLshort);
else
return -1; /* error */
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT)
return sizeof(GLushort);
else
return -1;
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT)
return sizeof(GLuint);
else
return -1;
default:
return -1;
}
}
/*
* Test if the given pixel format and type are legal.
* Return GL_TRUE for legal, GL_FALSE for illegal.
*/
GLboolean gl_is_legal_format_and_type( GLenum format, GLenum type )
{
switch (format) {
case GL_COLOR_INDEX:
case GL_STENCIL_INDEX:
switch (type) {
case GL_BITMAP:
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
return GL_TRUE;
default:
return GL_FALSE;
}
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_ALPHA:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
case GL_DEPTH_COMPONENT:
case GL_BGR:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
return GL_TRUE;
default:
return GL_FALSE;
}
case GL_RGB:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
return GL_TRUE;
default:
return GL_FALSE;
}
case GL_RGBA:
case GL_BGRA:
case GL_ABGR_EXT:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
return GL_TRUE;
default:
return GL_FALSE;
}
default:
; /* fall-through */
}
return GL_FALSE;
}
/*
* Return the address of a pixel in an image (actually a volume).
* Pixel unpacking/packing parameters are observed according to 'packing'.
* Input: image - start of image data
* width, height - size of image
* format - image format
* type - pixel component type
* packing - the pixelstore attributes
* img - which image in the volume (0 for 1D or 2D images)
* row, column - location of pixel in the image
* Return: address of pixel at (image,row,column) in image or NULL if error.
*/
GLvoid *gl_pixel_addr_in_image( const struct gl_pixelstore_attrib *packing,
const GLvoid *image, GLsizei width,
GLsizei height, GLenum format, GLenum type,
GLint img, GLint row, GLint column )
{
GLint alignment; /* 1, 2 or 4 */
GLint pixels_per_row;
GLint rows_per_image;
GLint skiprows;
GLint skippixels;
GLint skipimages; /* for 3-D volume images */
GLubyte *pixel_addr;
alignment = packing->Alignment;
if (packing->RowLength > 0) {
pixels_per_row = packing->RowLength;
}
else {
pixels_per_row = width;
}
if (packing->ImageHeight > 0) {
rows_per_image = packing->ImageHeight;
}
else {
rows_per_image = height;
}
skiprows = packing->SkipRows;
skippixels = packing->SkipPixels;
skipimages = packing->SkipImages;
if (type==GL_BITMAP) {
/* BITMAP data */
GLint comp_per_pixel; /* components per pixel */
GLint bytes_per_comp; /* bytes per component */
GLint bytes_per_row;
GLint bytes_per_image;
/* Compute bytes per component */
bytes_per_comp = gl_sizeof_packed_type( type );
if (bytes_per_comp<0) {
return NULL;
}
/* Compute number of components per pixel */
comp_per_pixel = gl_components_in_format( format );
if (comp_per_pixel<0 && type != GL_BITMAP) {
return NULL;
}
bytes_per_row = alignment
* CEILING( comp_per_pixel*pixels_per_row, 8*alignment );
bytes_per_image = bytes_per_row * rows_per_image;
pixel_addr = (GLubyte *) image
+ (skipimages + img) * bytes_per_image
+ (skiprows + row) * bytes_per_row
+ (skippixels + column) / 8;
}
else {
/* Non-BITMAP data */
GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
bytes_per_pixel = gl_bytes_per_pixel( format, type );
/* The pixel type and format should have been error checked earlier */
assert(bytes_per_pixel > 0);
bytes_per_row = pixels_per_row * bytes_per_pixel;
remainder = bytes_per_row % alignment;
if (remainder > 0)
bytes_per_row += (alignment - remainder);
ASSERT(bytes_per_row % alignment == 0);
bytes_per_image = bytes_per_row * rows_per_image;
/* compute final pixel address */
pixel_addr = (GLubyte *) image
+ (skipimages + img) * bytes_per_image
+ (skiprows + row) * bytes_per_row
+ (skippixels + column) * bytes_per_pixel;
}
return (GLvoid *) pixel_addr;
}
/*
* Allocate a new gl_image. All fields are initialized to zero.
*/
static struct gl_image *alloc_image( void )
{
return CALLOC_STRUCT(gl_image);
}
/*
* Allocate a new gl_image with the error flag set.
*/
static struct gl_image *alloc_error_image( GLint width, GLint height,
GLint depth, GLenum format,
GLenum type )
{
struct gl_image *image = alloc_image();
if (image) {
image->Width = width;
image->Height = height;
image->Depth = depth;
image->Format = format;
image->Type = type;
image->ErrorFlag = GL_TRUE;
}
return image;
}
/*
* Free a gl_image.
*/
void gl_free_image( struct gl_image *image )
{
if (image->Data) {
FREE(image->Data);
}
FREE(image);
}
/*
* Do error checking on an image. If there's an error, register it and
* return GL_TRUE, else return GL_FALSE.
*/
GLboolean gl_image_error_test( GLcontext *ctx, const struct gl_image *image,
const char *msg )
{
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, msg );
return GL_TRUE;
}
if (image->Width <= 0 || image->Height <= 0 || image->Depth <= 0) {
gl_error( ctx, GL_INVALID_VALUE, msg );
return GL_TRUE;
}
else if (!gl_is_legal_format_and_type(image->Format, image->Type)) {
return GL_TRUE;
}
else {
return GL_FALSE;
}
}
/*
* Unpack a depth-buffer image storing values as GLshort, GLuint, or GLfloats.
* Input: type - datatype of src depth image
* Return pointer to a new gl_image structure.
*
* Notes: if the source image type is GLushort then the gl_image will
* also store GLushorts. If the src image type is GLuint then the gl_image
* will also store GLuints. For all other src image types the gl_image
* will store GLfloats. The integer cases can later be optimized.
*/
static struct gl_image *
unpack_depth_image( GLcontext *ctx, GLenum type, GLint width, GLint height,
const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing)
{
struct gl_image *image;
GLfloat *fDst;
GLushort *sDst;
GLuint *iDst;
GLint i, j;
GLboolean errorType;
errorType = type != GL_BYTE &&
type != GL_UNSIGNED_BYTE &&
type != GL_SHORT &&
type != GL_UNSIGNED_SHORT &&
type != GL_INT &&
type != GL_UNSIGNED_INT &&
type != GL_FLOAT;
image = alloc_image();
if (image) {
image->Width = width;
image->Height = height;
image->Depth = 1;
image->Components = 1;
image->Format = GL_DEPTH_COMPONENT;
if (errorType) {
image->Type = type;
image->Data = NULL;
}
if (type==GL_UNSIGNED_SHORT) {
image->Type = GL_UNSIGNED_SHORT;
image->Data = MALLOC( width * height * sizeof(GLushort));
}
else if (type==GL_UNSIGNED_INT) {
image->Type = GL_UNSIGNED_INT;
image->Data = MALLOC( width * height * sizeof(GLuint));
}
else {
image->Type = GL_FLOAT;
image->Data = MALLOC( width * height * sizeof(GLfloat));
}
image->RefCount = 0;
if (!image->Data)
return image;
}
else {
return NULL;
}
if (errorType)
return image;
fDst = (GLfloat *) image->Data;
sDst = (GLushort *) image->Data;
iDst = (GLuint *) image->Data;
for (i=0;i<height;i++) {
GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
width, height,
GL_DEPTH_COMPONENT, type,
0, i, 0 );
if (!src) {
return image;
}
switch (type) {
case GL_BYTE:
assert(image->Type == GL_FLOAT);
for (j=0; j<width; j++) {
*fDst++ = BYTE_TO_FLOAT(((GLbyte*)src)[j]);
}
break;
case GL_UNSIGNED_BYTE:
assert(image->Type == GL_FLOAT);
for (j=0; j<width; j++) {
*fDst++ = UBYTE_TO_FLOAT(((GLubyte*)src)[j]);
}
break;
case GL_UNSIGNED_SHORT:
assert(image->Type == GL_UNSIGNED_SHORT);
MEMCPY( sDst, src, width * sizeof(GLushort) );
if (packing->SwapBytes) {
gl_swap2( sDst, width );
}
sDst += width;
break;
case GL_SHORT:
assert(image->Type == GL_FLOAT);
if (packing->SwapBytes) {
for (j=0;j<width;j++) {
GLshort value = ((GLshort*)src)[j];
value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
*fDst++ = SHORT_TO_FLOAT(value);
}
}
else {
for (j=0;j<width;j++) {
*fDst++ = SHORT_TO_FLOAT(((GLshort*)src)[j]);
}
}
break;
case GL_INT:
assert(image->Type == GL_FLOAT);
if (packing->SwapBytes) {
for (j=0;j<width;j++) {
GLint value = ((GLint*)src)[j];
value = ((value >> 24) & 0x000000ff) |
((value >> 8) & 0x0000ff00) |
((value << 8) & 0x00ff0000) |
((value << 24) & 0xff000000);
*fDst++ = INT_TO_FLOAT(value);
}
}
else {
for (j=0;j<width;j++) {
*fDst++ = INT_TO_FLOAT(((GLint*)src)[j]);
}
}
iDst += width;
break;
case GL_UNSIGNED_INT:
assert(image->Type == GL_UNSIGNED_INT);
MEMCPY( iDst, src, width * sizeof(GLuint) );
if (packing->SwapBytes) {
gl_swap4( iDst, width );
}
iDst += width;
break;
case GL_FLOAT:
assert(image->Type == GL_FLOAT);
MEMCPY( fDst, src, width * sizeof(GLfloat) );
if (packing->SwapBytes) {
gl_swap4( (GLuint*) fDst, width );
}
fDst += width;
break;
default:
gl_problem(ctx, "unpack_depth_image type" );
return image;
}
}
return image;
}
/*
* Unpack a stencil image. Store as GLubytes in a gl_image structure.
* Return: pointer to new gl_image structure.
*/
static struct gl_image *
unpack_stencil_image( GLcontext *ctx, GLenum type, GLint width, GLint height,
const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
struct gl_image *image;
GLubyte *dst;
GLint i, j;
GLboolean errorType;
assert(sizeof(GLstencil) == sizeof(GLubyte));
errorType = type != GL_BYTE &&
type != GL_UNSIGNED_BYTE &&
type != GL_SHORT &&
type != GL_UNSIGNED_SHORT &&
type != GL_INT &&
type != GL_UNSIGNED_INT &&
type != GL_FLOAT &&
type != GL_BITMAP;
image = alloc_image();
if (image) {
image->Width = width;
image->Height = height;
image->Depth = 1;
image->Components = 1;
image->Format = GL_STENCIL_INDEX;
if (errorType) {
image->Type = type;
image->Data = NULL;
}
else {
image->Type = GL_UNSIGNED_BYTE;
image->Data = MALLOC( width * height * sizeof(GLubyte));
}
image->RefCount = 0;
if (!image->Data)
return image;
}
else {
return NULL;
}
if (errorType)
return image; /* error will be generated later */
dst = (GLubyte *) image->Data;
for (i=0;i<height;i++) {
GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
width, height,
GL_STENCIL_INDEX, type,
0, i, 0 );
if (!src) {
return image;
}
switch (type) {
case GL_UNSIGNED_BYTE:
case GL_BYTE:
MEMCPY( dst, src, width * sizeof(GLubyte) );
dst += width * sizeof(GLubyte);
break;
case GL_UNSIGNED_SHORT:
case GL_SHORT:
if (packing->SwapBytes) {
/* grab upper byte */
for (j=0; j < width; j++) {
*dst++ = (((GLushort*)src)[j] & 0xff00) >> 8;
}
}
else {
for (j=0; j < width; j++) {
*dst++ = (((GLushort*)src)[j]) & 0xff;
}
}
break;
case GL_INT:
if (packing->SwapBytes) {
/* grab upper byte */
for (j=0; j < width; j++) {
*dst++ = (((GLuint*)src)[j] & 0xff000000) >> 8;
}
}
else {
for (j=0; j < width; j++) {
*dst++ = (((GLuint*)src)[j]) & 0xff;
}
}
break;
case GL_UNSIGNED_INT:
if (packing->SwapBytes) {
/* grab upper byte */
for (j=0; j < width; j++) {
*dst++ = (((GLuint*)src)[j] & 0xff000000) >> 8;
}
}
else {
for (j=0; j < width; j++) {
*dst++ = (((GLuint*)src)[j]) & 0xff;
}
}
break;
case GL_FLOAT:
if (packing->SwapBytes) {
for (j=0; j < width; j++) {
GLfloat fvalue;
GLint value = ((GLuint*)src)[j];
value = ((value & 0xff000000) >> 24)
| ((value & 0x00ff0000) >> 8)
| ((value & 0x0000ff00) << 8)
| ((value & 0x000000ff) << 24);
fvalue = *((GLfloat*) &value);
*dst++ = ((GLint) fvalue) & 0xff;
}
}
else {
for (j=0; j < width; j++) {
GLfloat fvalue = ((GLfloat *)src)[j];
*dst++ = ((GLint) fvalue) & 0xff;
}
}
break;
default:
gl_problem(ctx, "unpack_stencil_image type" );
return image;
}
}
return image;
}
/*
* Unpack a bitmap, return a new gl_image struct.
*/
static struct gl_image *
unpack_bitmap( GLenum format, GLint width, GLint height,
const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
struct gl_image *image;
GLint bytes, i, width_in_bytes;
GLubyte *buffer, *dst;
assert(format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX);
/* Alloc dest storage */
bytes = ((width+7)/8 * height);
if (bytes>0 && pixels!=NULL) {
buffer = (GLubyte *) MALLOC( bytes );
if (!buffer) {
return NULL;
}
/* Copy/unpack pixel data to buffer */
width_in_bytes = CEILING( width, 8 );
dst = buffer;
for (i=0; i<height; i++) {
GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
width, height,
GL_COLOR_INDEX, GL_BITMAP,
0, i, 0 );
if (!src) {
FREE(buffer);
return NULL;
}
MEMCPY( dst, src, width_in_bytes );
dst += width_in_bytes;
}
/* Bit flipping */
if (packing->LsbFirst) {
gl_flip_bytes( buffer, bytes );
}
}
else {
/* a 'null' bitmap */
buffer = NULL;
}
image = alloc_image();
if (image) {
image->Width = width;
image->Height = height;
image->Depth = 1;
image->Components = 0;
image->Format = format;
image->Type = GL_BITMAP;
image->Data = buffer;
image->RefCount = 0;
}
else {
FREE( buffer );
return NULL;
}
return image;
}
/*
* Unpack a 32x32 pixel polygon stipple from user memory using the
* current pixel unpack settings.
*/
void gl_unpack_polygon_stipple( const GLcontext *ctx,
const GLubyte *pattern, GLuint dest[32] )
{
GLint i;
for (i = 0; i < 32; i++) {
GLubyte *src = (GLubyte *) gl_pixel_addr_in_image( &ctx->Unpack, pattern,
32, 32, GL_COLOR_INDEX, GL_BITMAP, 0, i, 0 );
dest[i] = (src[0] << 24)
| (src[1] << 16)
| (src[2] << 8)
| (src[3] );
}
/* Bit flipping within each byte */
if (ctx->Unpack.LsbFirst) {
gl_flip_bytes( (GLubyte *) dest, 32 * 4 );
}
}
/*
* Pack polygon stipple into user memory given current pixel packing
* settings.
*/
void gl_pack_polygon_stipple( const GLcontext *ctx,
const GLuint pattern[32],
GLubyte *dest )
{
GLint i;
for (i = 0; i < 32; i++) {
GLubyte *dst = (GLubyte *) gl_pixel_addr_in_image( &ctx->Pack, dest,
32, 32, GL_COLOR_INDEX, GL_BITMAP, 0, i, 0 );
dst[0] = (pattern[i] >> 24) & 0xff;
dst[1] = (pattern[i] >> 16) & 0xff;
dst[2] = (pattern[i] >> 8) & 0xff;
dst[3] = (pattern[i] ) & 0xff;
/* Bit flipping within each byte */
if (ctx->Pack.LsbFirst) {
gl_flip_bytes( (GLubyte *) dst, 4 );
}
}
}
/*
* Unpack an RGBA or CI image and store it as unsigned bytes
*/
static struct gl_image *
unpack_ubyte_image( GLint width, GLint height,
GLint depth, GLenum format, const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
struct gl_image *image;
GLint width_in_bytes;
GLint components;
GLubyte *buffer, *dst;
GLint i, d;
components = gl_components_in_format( format );
width_in_bytes = width * components * sizeof(GLubyte);
buffer = (GLubyte *) MALLOC( height * width_in_bytes * depth );
if (!buffer) {
return NULL;
}
/* Copy/unpack pixel data to buffer */
dst = buffer;
for (d=0; d<depth; d++ ) {
for (i=0;i<height;i++) {
GLubyte *src = (GLubyte *) gl_pixel_addr_in_image( packing,
pixels, width, height, format, GL_UNSIGNED_BYTE,
d, i, 0 );
if (!src) {
FREE(buffer);
return NULL;
}
MEMCPY( dst, src, width_in_bytes );
dst += width_in_bytes;
}
}
if (format == GL_BGR) {
/* swap order of every ubyte triplet from BGR to RGB */
for (i=0; i<width*height; i++) {
GLubyte b = buffer[i*3+0];
GLubyte r = buffer[i*3+2];
buffer[i*3+0] = r;
buffer[i*3+2] = b;
}
}
else if (format == GL_BGRA) {
/* swap order of every ubyte quadruplet from BGRA to RGBA */
for (i=0; i<width*height; i++) {
GLubyte b = buffer[i*4+0];
GLubyte r = buffer[i*4+2];
buffer[i*4+0] = r;
buffer[i*4+2] = b;
}
}
else if (format == GL_ABGR_EXT) {
/* swap order of every ubyte quadruplet from ABGR to RGBA */
for (i=0; i<width*height; i++) {
GLubyte a = buffer[i*4+0];
GLubyte b = buffer[i*4+1];
GLubyte g = buffer[i*4+2];
GLubyte r = buffer[i*4+3];
buffer[i*4+0] = r;
buffer[i*4+1] = g;
buffer[i*4+2] = b;
buffer[i*4+3] = a;
}
}
image = alloc_image();
if (image) {
image->Width = width;
image->Height = height;
image->Depth = depth;
image->Components = components;
if (format == GL_BGR)
image->Format = GL_RGB;
else if (format == GL_BGRA)
image->Format = GL_RGBA;
else if (format == GL_ABGR_EXT)
image->Format = GL_RGBA;
else
image->Format = format;
image->Type = GL_UNSIGNED_BYTE;
image->Data = buffer;
image->RefCount = 0;
}
else {
FREE( buffer );
}
return image;
}
/*
* Unpack a color image storing image as GLfloats
*/
static struct gl_image *
unpack_float_image( GLcontext *ctx, GLint width, GLint height, GLint depth,
GLenum format, GLenum type, const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
struct gl_image *image;
GLfloat *dst;
GLint elems_per_row;
GLint components;
GLint i, j, d;
GLboolean normalize;
assert(type != GL_BITMAP);
components = gl_components_in_format( format );
assert(components > 0); /* should have been caught earlier */
if (!gl_is_legal_format_and_type( format, type )) {
/* bad pixel type for format, make dummy image */
image = alloc_image();
if (image) {
image->Width = width;
image->Height = height;
image->Depth = depth;
image->Components = components;
image->Format = format;
image->Type = type;
image->Data = NULL;
image->RefCount = 0;
}
return image;
}
elems_per_row = width * components;
image = alloc_image();
if (image) {
image->Width = width;
image->Height = height;
image->Depth = depth;
image->Components = components;
if (format == GL_BGR)
image->Format = GL_RGB;
else if (format == GL_BGRA)
image->Format = GL_RGBA;
else if (format == GL_ABGR_EXT)
image->Format = GL_RGBA;
else
image->Format = format;
image->Type = GL_FLOAT;
image->Data = MALLOC( elems_per_row * height * depth * sizeof(GLfloat));
image->RefCount = 0;
if (!image->Data)
return image;
}
else {
return NULL;
}
normalize = (format != GL_COLOR_INDEX) && (format != GL_STENCIL_INDEX);
dst = (GLfloat *) image->Data;
for (d=0; d<depth; d++) {
for (i=0;i<height;i++) {
GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
width, height,
format, type,
d, i, 0 );
if (!src) {
return image;
}
switch (type) {
case GL_UNSIGNED_BYTE:
{
GLubyte *ubsrc = (GLubyte *) src;
if (normalize) {
for (j=0;j<elems_per_row;j++) {
*dst++ = UBYTE_TO_FLOAT(ubsrc[j]);
}
}
else {
for (j=0;j<elems_per_row;j++) {
*dst++ = (GLfloat) ubsrc[j];
}
}
}
break;
case GL_BYTE:
if (normalize) {
for (j=0;j<elems_per_row;j++) {
*dst++ = BYTE_TO_FLOAT(((GLbyte*)src)[j]);
}
}
else {
for (j=0;j<elems_per_row;j++) {
*dst++ = (GLfloat) ((GLbyte*)src)[j];
}
}
break;
case GL_UNSIGNED_SHORT:
if (packing->SwapBytes) {
for (j=0;j<elems_per_row;j++) {
GLushort value = ((GLushort*)src)[j];
value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
if (normalize) {
*dst++ = USHORT_TO_FLOAT(value);
}
else {
*dst++ = (GLfloat) value;
}
}
}
else {
if (normalize) {
for (j=0;j<elems_per_row;j++) {
*dst++ = USHORT_TO_FLOAT(((GLushort*)src)[j]);
}
}
else {
for (j=0;j<elems_per_row;j++) {
*dst++ = (GLfloat) ((GLushort*)src)[j];
}
}
}
break;
case GL_SHORT:
if (packing->SwapBytes) {
for (j=0;j<elems_per_row;j++) {
GLshort value = ((GLshort*)src)[j];
value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
if (normalize) {
*dst++ = SHORT_TO_FLOAT(value);
}
else {
*dst++ = (GLfloat) value;
}
}
}
else {
if (normalize) {
for (j=0;j<elems_per_row;j++) {
*dst++ = SHORT_TO_FLOAT(((GLshort*)src)[j]);
}
}
else {
for (j=0;j<elems_per_row;j++) {
*dst++ = (GLfloat) ((GLshort*)src)[j];
}
}
}
break;
case GL_UNSIGNED_INT:
if (packing->SwapBytes) {
GLuint value;
for (j=0;j<elems_per_row;j++) {
value = ((GLuint*)src)[j];
value = ((value & 0xff000000) >> 24)
| ((value & 0x00ff0000) >> 8)
| ((value & 0x0000ff00) << 8)
| ((value & 0x000000ff) << 24);
if (normalize) {
*dst++ = UINT_TO_FLOAT(value);
}
else {
*dst++ = (GLfloat) value;
}
}
}
else {
if (normalize) {
for (j=0;j<elems_per_row;j++) {
*dst++ = UINT_TO_FLOAT(((GLuint*)src)[j]);
}
}
else {
for (j=0;j<elems_per_row;j++) {
*dst++ = (GLfloat) ((GLuint*)src)[j];
}
}
}
break;
case GL_INT:
if (packing->SwapBytes) {
GLint value;
for (j=0;j<elems_per_row;j++) {
value = ((GLint*)src)[j];
value = ((value & 0xff000000) >> 24)
| ((value & 0x00ff0000) >> 8)
| ((value & 0x0000ff00) << 8)
| ((value & 0x000000ff) << 24);
if (normalize) {
*dst++ = INT_TO_FLOAT(value);
}
else {
*dst++ = (GLfloat) value;
}
}
}
else {
if (normalize) {
for (j=0;j<elems_per_row;j++) {
*dst++ = INT_TO_FLOAT(((GLint*)src)[j]);
}
}
else {
for (j=0;j<elems_per_row;j++) {
*dst++ = (GLfloat) ((GLint*)src)[j];
}
}
}
break;
case GL_FLOAT:
if (packing->SwapBytes) {
GLint value;
for (j=0;j<elems_per_row;j++) {
value = ((GLuint*)src)[j];
value = ((value & 0xff000000) >> 24)
| ((value & 0x00ff0000) >> 8)
| ((value & 0x0000ff00) << 8)
| ((value & 0x000000ff) << 24);
*dst++ = *((GLfloat*) &value);
}
}
else {
MEMCPY( dst, src, elems_per_row*sizeof(GLfloat) );
dst += elems_per_row;
}
break;
case GL_UNSIGNED_BYTE_3_3_2:
{
GLubyte *ubsrc = (GLubyte *) src;
for (j=0;j<width;j++) {
GLubyte p = ubsrc[j];
*dst++ = ((p >> 5) ) * (1.0F / 7.0F); /* red */
*dst++ = ((p >> 2) & 0x7) * (1.0F / 7.0F); /* green */
*dst++ = ((p ) & 0x3) * (1.0F / 3.0F); /* blue */
}
}
break;
case GL_UNSIGNED_BYTE_2_3_3_REV:
{
GLubyte *ubsrc = (GLubyte *) src;
for (j=0;j<width;j++) {
GLubyte p = ubsrc[j];
*dst++ = ((p ) & 0x7) * (1.0F / 7.0F); /* red */
*dst++ = ((p >> 3) & 0x7) * (1.0F / 7.0F); /* green */
*dst++ = ((p >> 6) ) * (1.0F / 3.0F); /* blue */
}
}
break;
case GL_UNSIGNED_SHORT_5_6_5:
{
GLushort *ussrc = (GLushort *) src;
for (j=0;j<width;j++) {
GLushort p = ussrc[j];
*dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* red */
*dst++ = ((p >> 5) & 0x3f) * (1.0F / 63.0F); /* green */
*dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* blue */
}
}
break;
case GL_UNSIGNED_SHORT_5_6_5_REV:
{
GLushort *ussrc = (GLushort *) src;
for (j=0;j<width;j++) {
GLushort p = ussrc[j];
*dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* red */
*dst++ = ((p >> 5) & 0x3f) * (1.0F / 63.0F); /* green */
*dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* blue */
}
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4:
{
GLushort *ussrc = (GLushort *) src;
for (j=0;j<width;j++) {
GLushort p = ussrc[j];
*dst++ = ((p >> 12) ) * (1.0F / 15.0F); /* red */
*dst++ = ((p >> 8) & 0xf) * (1.0F / 15.0F); /* green */
*dst++ = ((p >> 4) & 0xf) * (1.0F / 15.0F); /* blue */
*dst++ = ((p ) & 0xf) * (1.0F / 15.0F); /* alpha */
}
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
{
GLushort *ussrc = (GLushort *) src;
for (j=0;j<width;j++) {
GLushort p = ussrc[j];
*dst++ = ((p ) & 0xf) * (1.0F / 15.0F); /* red */
*dst++ = ((p >> 4) & 0xf) * (1.0F / 15.0F); /* green */
*dst++ = ((p >> 8) & 0xf) * (1.0F / 15.0F); /* blue */
*dst++ = ((p >> 12) ) * (1.0F / 15.0F); /* alpha */
}
}
break;
case GL_UNSIGNED_SHORT_5_5_5_1:
{
GLushort *ussrc = (GLushort *) src;
for (j=0;j<width;j++) {
GLushort p = ussrc[j];
*dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* red */
*dst++ = ((p >> 6) & 0x1f) * (1.0F / 31.0F); /* green */
*dst++ = ((p >> 1) & 0x1f) * (1.0F / 31.0F); /* blue */
*dst++ = ((p ) & 0x1) * (1.0F / 1.0F); /* alpha */
}
}
break;
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
{
GLushort *ussrc = (GLushort *) src;
for (j=0;j<width;j++) {
GLushort p = ussrc[j];
*dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* red */
*dst++ = ((p >> 5) & 0x1f) * (1.0F / 31.0F); /* green */
*dst++ = ((p >> 10) & 0x1f) * (1.0F / 31.0F); /* blue */
*dst++ = ((p >> 15) ) * (1.0F / 1.0F); /* alpha */
}
}
break;
case GL_UNSIGNED_INT_8_8_8_8:
{
GLuint *uisrc = (GLuint *) src;
for (j=0;j<width;j++) {
GLuint p = uisrc[j];
*dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
*dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
*dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
*dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
}
}
break;
case GL_UNSIGNED_INT_8_8_8_8_REV:
{
GLuint *uisrc = (GLuint *) src;
for (j=0;j<width;j++) {
GLuint p = uisrc[j];
*dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
*dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
*dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
*dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
}
}
break;
case GL_UNSIGNED_INT_10_10_10_2:
{
GLuint *uisrc = (GLuint *) src;
for (j=0;j<width;j++) {
GLuint p = uisrc[j];
*dst++ = ((p >> 22) ) * (1.0F / 1023.0F); /* r */
*dst++ = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F); /* g */
*dst++ = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F); /* b */
*dst++ = ((p ) & 0x3 ) * (1.0F / 3.0F); /* a */
}
}
break;
case GL_UNSIGNED_INT_2_10_10_10_REV:
{
GLuint *uisrc = (GLuint *) src;
for (j=0;j<width;j++) {
GLuint p = uisrc[j];
*dst++ = ((p ) & 0x3ff) * (1.0F / 1023.0F); /* r*/
*dst++ = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F); /* g */
*dst++ = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F); /* b */
*dst++ = ((p >> 30) ) * (1.0F / 3.0F); /* a */
}
}
break;
default:
gl_problem(ctx, "unpack_float_image type" );
return image;
}
}
}
if (format == GL_BGR) {
/* swap order of every float triplet from BGR to RGBA */
GLfloat *buffer = (GLfloat *) image->Data;
for (i=0; i<width*height*depth; i++) {
GLfloat b = buffer[i*3+0];
GLfloat r = buffer[i*3+2];
buffer[i*3+0] = r;
buffer[i*3+2] = b;
}
}
else if (format == GL_BGRA) {
/* swap order of every float quadruplet from BGRA to RGBA */
GLfloat *buffer = (GLfloat *) image->Data;
for (i=0; i<width*height*depth; i++) {
GLfloat b = buffer[i*4+0];
GLfloat r = buffer[i*4+2];
buffer[i*4+0] = r;
buffer[i*4+2] = b;
}
}
else if (format == GL_ABGR_EXT) {
/* swap order of every float quadruplet from ABGR to RGBA */
GLfloat *buffer = (GLfloat *) image->Data;
for (i=0; i<width*height*depth; i++) {
GLfloat a = buffer[i*4+0];
GLfloat b = buffer[i*4+1];
GLfloat g = buffer[i*4+2];
GLfloat r = buffer[i*4+3];
buffer[i*4+0] = r;
buffer[i*4+1] = g;
buffer[i*4+2] = b;
buffer[i*4+3] = a;
}
}
return image;
}
/*
* Unpack a bitmap image, using current glPixelStore parameters,
* making a new gl_image.
*/
struct gl_image *gl_unpack_bitmap( GLcontext *ctx,
GLsizei width, GLsizei height,
const GLubyte *bitmap,
const struct gl_pixelstore_attrib *packing )
{
return gl_unpack_image( ctx, width, height,
GL_COLOR_INDEX, GL_BITMAP, bitmap, packing );
}
/*
* Unpack a 2-D image from user's buffer. Return pointer to new
* gl_image struct.
*
* Input: width, height - size in pixels
* format - format of incoming pixel data
* type - datatype of incoming pixel data
* pixels - pointer to unpacked image in user buffer
*/
struct gl_image *gl_unpack_image( GLcontext *ctx,
GLint width, GLint height,
GLenum format, GLenum type,
const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
return gl_unpack_image3D( ctx, width, height, 1,
format, type, pixels, packing );
}
/*
* Unpack a 1, 2 or 3-D image from user-supplied address, returning a
* pointer to a new gl_image struct.
* This function is always called by a higher-level unpack function such
* as gl_unpack_texsubimage() or gl_unpack_bitmap().
*
* Input: width, height, depth - size in pixels
* format - format of incoming pixel data
* type - datatype of incoming pixel data
* pixels - pointer to unpacked image.
*/
struct gl_image *gl_unpack_image3D( GLcontext *ctx,
GLint width, GLint height, GLint depth,
GLenum format, GLenum type,
const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing)
{
if (width <= 0 || height <= 0 || depth <= 0) {
return alloc_error_image(width, height, depth, format, type);
}
if (type==GL_BITMAP) {
if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
return alloc_error_image(width, height, depth, format, type);
}
else {
return unpack_bitmap( format, width, height, pixels, packing );
}
}
else if (format==GL_DEPTH_COMPONENT) {
/* TODO: pack as GLdepth values (GLushort or GLuint) */
return unpack_depth_image( ctx, type, width, height, pixels, packing );
}
else if (format==GL_STENCIL_INDEX) {
/* TODO: pack as GLstencil (GLubyte or GLushort) */
return unpack_stencil_image( ctx, type, width, height, pixels, packing );
}
else if (type==GL_UNSIGNED_BYTE) {
/* upack, convert to GLubytes */
return unpack_ubyte_image( width, height, depth, format, pixels, packing );
}
else {
/* upack, convert to floats */
return unpack_float_image( ctx, width, height, depth,
format, type, pixels, packing );
}
/* never get here */
/*return NULL;*/
}
/*
* Apply pixel-transfer operations (scale, bias, mapping) to a single row
* of a gl_image. Put resulting color components into result array.
*/
void gl_scale_bias_map_image_data( const GLcontext *ctx,
const struct gl_image *image,
GLint row, GLubyte result[] )
{
GLint start, i;
assert(ctx);
assert(image);
assert(result);
assert(row >= 0);
start = row * image->Width * image->Components;
for (i=0; i < image->Width; i++) {
GLint pos = start+i;
GLfloat red, green, blue, alpha;
if (image->Type == GL_UNSIGNED_BYTE) {
const GLubyte *data = (GLubyte *) image->Data;
switch (image->Format) {
case GL_RED:
red = data[pos] * (1.0F/255.0F);
green = 0;
blue = 0;
alpha = 0;
break;
case GL_RGB:
red = data[pos*3+0] * (1.0F/255.0F);
green = data[pos*3+1] * (1.0F/255.0F);
blue = data[pos*3+2] * (1.0F/255.0F);
alpha = 0;
break;
default:
gl_problem(ctx, "bad image format in gl_scale...image_data");
return;
}
}
else if (image->Type == GL_FLOAT) {
const GLubyte *data = (GLubyte *) image->Data;
switch (image->Format) {
case GL_RED:
red = data[pos];
green = 0;
blue = 0;
alpha = 0;
break;
case GL_RGB:
red = data[pos*3+0];
green = data[pos*3+1];
blue = data[pos*3+2];
alpha = 0;
break;
default:
gl_problem(ctx, "bad image format in gl_scale...image_data");
return;
}
}
else {
gl_problem(ctx, "Bad image type in gl_scale_...image_data");
return;
}
assert(red >= 0.0 && red <= 1.0);
assert(green >= 0.0 && green <= 1.0);
assert(blue >= 0.0 && blue <= 1.0);
assert(alpha >= 0.0 && alpha <= 1.0);
/*
if (scale or bias) {
}
if (mapping) {
}
*/
result[i*4+0] = (GLubyte) (red * 255.0);
result[i*4+1] = (GLubyte) (green * 255.0);
result[i*4+2] = (GLubyte) (blue * 255.0);
result[i*4+3] = (GLubyte) (alpha * 255.0);
}
}
/*
* Pack the given RGBA span into client memory at 'dest' address
* in the given pixel format and type.
* Optionally apply the enabled pixel transfer ops.
* Pack into memory using the given packing params struct.
* This is used by glReadPixels and glGetTexImage?D()
* Input: ctx - the context
* n - number of pixels in the span
* rgba - the pixels
* format - dest packing format
* type - dest packing datatype
* destination - destination packing address
* packing - pixel packing parameters
* applyTransferOps - apply scale/bias/lookup-table ops?
*/
void gl_pack_rgba_span( const GLcontext *ctx,
GLuint n, CONST GLubyte rgba[][4],
GLenum format, GLenum type, GLvoid *destination,
const struct gl_pixelstore_attrib *packing,
GLboolean applyTransferOps )
{
/* Test for optimized case first */
if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
/* common simple case */
MEMCPY( destination, rgba, n * 4 * sizeof(GLubyte) );
}
else if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
format == GL_RGB && type == GL_UNSIGNED_BYTE) {
/* common simple case */
GLint i;
GLubyte *dest = (GLubyte *) destination;
for (i = 0; i < n; i++) {
dest[0] = rgba[i][RCOMP];
dest[1] = rgba[i][GCOMP];
dest[2] = rgba[i][BCOMP];
dest += 3;
}
}
else {
GLfloat red[MAX_WIDTH], green[MAX_WIDTH], blue[MAX_WIDTH];
GLfloat alpha[MAX_WIDTH], luminance[MAX_WIDTH];
const GLfloat rscale = 1.0F / 255.0F;
const GLfloat gscale = 1.0F / 255.0F;
const GLfloat bscale = 1.0F / 255.0F;
const GLfloat ascale = 1.0F / 255.0F;
const GLint comps = gl_components_in_format(format);
GLuint i;
assert(n <= MAX_WIDTH);
/* convert color components to floating point */
for (i=0;i<n;i++) {
red[i] = rgba[i][RCOMP] * rscale;
green[i] = rgba[i][GCOMP] * gscale;
blue[i] = rgba[i][BCOMP] * bscale;
alpha[i] = rgba[i][ACOMP] * ascale;
}
/*
* Apply scale, bias and lookup-tables if enabled.
*/
if (applyTransferOps) {
if (ctx->Pixel.ScaleOrBiasRGBA) {
gl_scale_and_bias_color( ctx, n, red, green, blue, alpha );
}
if (ctx->Pixel.MapColorFlag) {
gl_map_color( ctx, n, red, green, blue, alpha );
}
}
if (format==GL_LUMINANCE || format==GL_LUMINANCE_ALPHA) {
for (i=0;i<n;i++) {
GLfloat sum = red[i] + green[i] + blue[i];
luminance[i] = CLAMP( sum, 0.0F, 1.0F );
}
}
/*
* Pack/store the pixels. Ugh! Lots of cases!!!
*/
switch (type) {
case GL_UNSIGNED_BYTE:
{
GLubyte *dst = (GLubyte *) destination;
switch (format) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UBYTE(red[i]);
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UBYTE(green[i]);
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UBYTE(blue[i]);
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UBYTE(alpha[i]);
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UBYTE(luminance[i]);
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = FLOAT_TO_UBYTE(luminance[i]);
dst[i*2+1] = FLOAT_TO_UBYTE(alpha[i]);
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_UBYTE(red[i]);
dst[i*3+1] = FLOAT_TO_UBYTE(green[i]);
dst[i*3+2] = FLOAT_TO_UBYTE(blue[i]);
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_UBYTE(red[i]);
dst[i*4+1] = FLOAT_TO_UBYTE(green[i]);
dst[i*4+2] = FLOAT_TO_UBYTE(blue[i]);
dst[i*4+3] = FLOAT_TO_UBYTE(alpha[i]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_UBYTE(blue[i]);
dst[i*3+1] = FLOAT_TO_UBYTE(green[i]);
dst[i*3+2] = FLOAT_TO_UBYTE(red[i]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_UBYTE(blue[i]);
dst[i*4+1] = FLOAT_TO_UBYTE(green[i]);
dst[i*4+2] = FLOAT_TO_UBYTE(red[i]);
dst[i*4+3] = FLOAT_TO_UBYTE(alpha[i]);
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_UBYTE(alpha[i]);
dst[i*4+1] = FLOAT_TO_UBYTE(blue[i]);
dst[i*4+2] = FLOAT_TO_UBYTE(green[i]);
dst[i*4+3] = FLOAT_TO_UBYTE(red[i]);
}
break;
default:
gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
}
}
break;
case GL_BYTE:
{
GLbyte *dst = (GLbyte *) destination;
switch (format) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_BYTE(red[i]);
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_BYTE(green[i]);
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_BYTE(blue[i]);
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_BYTE(alpha[i]);
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_BYTE(luminance[i]);
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]);
dst[i*2+1] = FLOAT_TO_BYTE(alpha[i]);
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_BYTE(red[i]);
dst[i*3+1] = FLOAT_TO_BYTE(green[i]);
dst[i*3+2] = FLOAT_TO_BYTE(blue[i]);
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_BYTE(red[i]);
dst[i*4+1] = FLOAT_TO_BYTE(green[i]);
dst[i*4+2] = FLOAT_TO_BYTE(blue[i]);
dst[i*4+3] = FLOAT_TO_BYTE(alpha[i]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_BYTE(blue[i]);
dst[i*3+1] = FLOAT_TO_BYTE(green[i]);
dst[i*3+2] = FLOAT_TO_BYTE(red[i]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_BYTE(blue[i]);
dst[i*4+1] = FLOAT_TO_BYTE(green[i]);
dst[i*4+2] = FLOAT_TO_BYTE(red[i]);
dst[i*4+3] = FLOAT_TO_BYTE(alpha[i]);
}
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_BYTE(alpha[i]);
dst[i*4+1] = FLOAT_TO_BYTE(blue[i]);
dst[i*4+2] = FLOAT_TO_BYTE(green[i]);
dst[i*4+3] = FLOAT_TO_BYTE(red[i]);
}
break;
default:
gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
}
}
break;
case GL_UNSIGNED_SHORT:
{
GLushort *dst = (GLushort *) destination;
switch (format) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_USHORT(red[i]);
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_USHORT(green[i]);
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_USHORT(blue[i]);
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_USHORT(alpha[i]);
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_USHORT(luminance[i]);
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = FLOAT_TO_USHORT(luminance[i]);
dst[i*2+1] = FLOAT_TO_USHORT(alpha[i]);
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_USHORT(red[i]);
dst[i*3+1] = FLOAT_TO_USHORT(green[i]);
dst[i*3+2] = FLOAT_TO_USHORT(blue[i]);
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_USHORT(red[i]);
dst[i*4+1] = FLOAT_TO_USHORT(green[i]);
dst[i*4+2] = FLOAT_TO_USHORT(blue[i]);
dst[i*4+3] = FLOAT_TO_USHORT(alpha[i]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_USHORT(blue[i]);
dst[i*3+1] = FLOAT_TO_USHORT(green[i]);
dst[i*3+2] = FLOAT_TO_USHORT(red[i]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_USHORT(blue[i]);
dst[i*4+1] = FLOAT_TO_USHORT(green[i]);
dst[i*4+2] = FLOAT_TO_USHORT(red[i]);
dst[i*4+3] = FLOAT_TO_USHORT(alpha[i]);
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_USHORT(alpha[i]);
dst[i*4+1] = FLOAT_TO_USHORT(blue[i]);
dst[i*4+2] = FLOAT_TO_USHORT(green[i]);
dst[i*4+3] = FLOAT_TO_USHORT(red[i]);
}
break;
default:
gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
}
if (packing->SwapBytes) {
gl_swap2( (GLushort *) dst, n * comps);
}
}
break;
case GL_SHORT:
{
GLshort *dst = (GLshort *) destination;
switch (format) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_SHORT(red[i]);
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_SHORT(green[i]);
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_SHORT(blue[i]);
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_SHORT(alpha[i]);
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_SHORT(luminance[i]);
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]);
dst[i*2+1] = FLOAT_TO_SHORT(alpha[i]);
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_SHORT(red[i]);
dst[i*3+1] = FLOAT_TO_SHORT(green[i]);
dst[i*3+2] = FLOAT_TO_SHORT(blue[i]);
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_SHORT(red[i]);
dst[i*4+1] = FLOAT_TO_SHORT(green[i]);
dst[i*4+2] = FLOAT_TO_SHORT(blue[i]);
dst[i*4+3] = FLOAT_TO_SHORT(alpha[i]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_SHORT(blue[i]);
dst[i*3+1] = FLOAT_TO_SHORT(green[i]);
dst[i*3+2] = FLOAT_TO_SHORT(red[i]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_SHORT(blue[i]);
dst[i*4+1] = FLOAT_TO_SHORT(green[i]);
dst[i*4+2] = FLOAT_TO_SHORT(red[i]);
dst[i*4+3] = FLOAT_TO_SHORT(alpha[i]);
}
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_SHORT(alpha[i]);
dst[i*4+1] = FLOAT_TO_SHORT(blue[i]);
dst[i*4+2] = FLOAT_TO_SHORT(green[i]);
dst[i*4+3] = FLOAT_TO_SHORT(red[i]);
}
break;
default:
gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
}
if (packing->SwapBytes) {
gl_swap2( (GLushort *) dst, n * comps );
}
}
break;
case GL_UNSIGNED_INT:
{
GLuint *dst = (GLuint *) destination;
switch (format) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UINT(red[i]);
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UINT(green[i]);
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UINT(blue[i]);
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UINT(alpha[i]);
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_UINT(luminance[i]);
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = FLOAT_TO_UINT(luminance[i]);
dst[i*2+1] = FLOAT_TO_UINT(alpha[i]);
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_UINT(red[i]);
dst[i*3+1] = FLOAT_TO_UINT(green[i]);
dst[i*3+2] = FLOAT_TO_UINT(blue[i]);
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_UINT(red[i]);
dst[i*4+1] = FLOAT_TO_UINT(green[i]);
dst[i*4+2] = FLOAT_TO_UINT(blue[i]);
dst[i*4+3] = FLOAT_TO_UINT(alpha[i]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_UINT(blue[i]);
dst[i*3+1] = FLOAT_TO_UINT(green[i]);
dst[i*3+2] = FLOAT_TO_UINT(red[i]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_UINT(blue[i]);
dst[i*4+1] = FLOAT_TO_UINT(green[i]);
dst[i*4+2] = FLOAT_TO_UINT(red[i]);
dst[i*4+3] = FLOAT_TO_UINT(alpha[i]);
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_UINT(alpha[i]);
dst[i*4+1] = FLOAT_TO_UINT(blue[i]);
dst[i*4+2] = FLOAT_TO_UINT(green[i]);
dst[i*4+3] = FLOAT_TO_UINT(red[i]);
}
break;
default:
gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
}
if (packing->SwapBytes) {
gl_swap4( (GLuint *) dst, n * comps );
}
}
break;
case GL_INT:
{
GLint *dst = (GLint *) destination;
switch (format) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_INT(red[i]);
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_INT(green[i]);
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_INT(blue[i]);
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_INT(alpha[i]);
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = FLOAT_TO_INT(luminance[i]);
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = FLOAT_TO_INT(luminance[i]);
dst[i*2+1] = FLOAT_TO_INT(alpha[i]);
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_INT(red[i]);
dst[i*3+1] = FLOAT_TO_INT(green[i]);
dst[i*3+2] = FLOAT_TO_INT(blue[i]);
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_INT(red[i]);
dst[i*4+1] = FLOAT_TO_INT(green[i]);
dst[i*4+2] = FLOAT_TO_INT(blue[i]);
dst[i*4+3] = FLOAT_TO_INT(alpha[i]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_INT(blue[i]);
dst[i*3+1] = FLOAT_TO_INT(green[i]);
dst[i*3+2] = FLOAT_TO_INT(red[i]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_INT(blue[i]);
dst[i*4+1] = FLOAT_TO_INT(green[i]);
dst[i*4+2] = FLOAT_TO_INT(red[i]);
dst[i*4+3] = FLOAT_TO_INT(alpha[i]);
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_INT(alpha[i]);
dst[i*4+1] = FLOAT_TO_INT(blue[i]);
dst[i*4+2] = FLOAT_TO_INT(green[i]);
dst[i*4+3] = FLOAT_TO_INT(red[i]);
}
break;
default:
gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
}
if (packing->SwapBytes) {
gl_swap4( (GLuint *) dst, n * comps );
}
}
break;
case GL_FLOAT:
{
GLfloat *dst = (GLfloat *) destination;
switch (format) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = red[i];
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = green[i];
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = blue[i];
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = alpha[i];
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = luminance[i];
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = luminance[i];
dst[i*2+1] = alpha[i];
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = red[i];
dst[i*3+1] = green[i];
dst[i*3+2] = blue[i];
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = red[i];
dst[i*4+1] = green[i];
dst[i*4+2] = blue[i];
dst[i*4+3] = alpha[i];
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = blue[i];
dst[i*3+1] = green[i];
dst[i*3+2] = red[i];
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = blue[i];
dst[i*4+1] = green[i];
dst[i*4+2] = red[i];
dst[i*4+3] = alpha[i];
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = alpha[i];
dst[i*4+1] = blue[i];
dst[i*4+2] = green[i];
dst[i*4+3] = red[i];
}
break;
default:
gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
}
if (packing->SwapBytes) {
gl_swap4( (GLuint *) dst, n * comps );
}
}
break;
case GL_UNSIGNED_BYTE_3_3_2:
if (format == GL_RGB) {
GLubyte *dst = (GLubyte *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (red[i] * 7.0F)) << 5)
| (((GLint) (green[i] * 7.0F)) << 2)
| (((GLint) (blue[i] * 3.0F)) );
}
}
break;
case GL_UNSIGNED_BYTE_2_3_3_REV:
if (format == GL_RGB) {
GLubyte *dst = (GLubyte *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (red[i] * 7.0F)) )
| (((GLint) (green[i] * 7.0F)) << 3)
| (((GLint) (blue[i] * 3.0F)) << 5);
}
}
break;
case GL_UNSIGNED_SHORT_5_6_5:
if (format == GL_RGB) {
GLushort *dst = (GLushort *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (red[i] * 31.0F)) << 11)
| (((GLint) (green[i] * 63.0F)) << 5)
| (((GLint) (blue[i] * 31.0F)) );
}
}
break;
case GL_UNSIGNED_SHORT_5_6_5_REV:
if (format == GL_RGB) {
GLushort *dst = (GLushort *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (red[i] * 31.0F)) )
| (((GLint) (green[i] * 63.0F)) << 5)
| (((GLint) (blue[i] * 31.0F)) << 11);
}
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4:
if (format == GL_RGB) {
GLushort *dst = (GLushort *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (red[i] * 15.0F)) << 12)
| (((GLint) (green[i] * 15.0F)) << 8)
| (((GLint) (blue[i] * 15.0F)) << 4)
| (((GLint) (alpha[i] * 15.0F)) );
}
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
if (format == GL_RGB) {
GLushort *dst = (GLushort *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (red[i] * 15.0F)) )
| (((GLint) (green[i] * 15.0F)) << 4)
| (((GLint) (blue[i] * 15.0F)) << 8)
| (((GLint) (alpha[i] * 15.0F)) << 12);
}
}
break;
case GL_UNSIGNED_SHORT_5_5_5_1:
if (format == GL_RGB) {
GLushort *dst = (GLushort *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (red[i] * 31.0F)) << 11)
| (((GLint) (green[i] * 31.0F)) << 6)
| (((GLint) (blue[i] * 31.0F)) << 1)
| (((GLint) (alpha[i] * 1.0F)) );
}
}
break;
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
if (format == GL_RGB) {
GLushort *dst = (GLushort *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (red[i] * 31.0F)) )
| (((GLint) (green[i] * 31.0F)) << 5)
| (((GLint) (blue[i] * 31.0F)) << 10)
| (((GLint) (alpha[i] * 1.0F)) << 15);
}
}
break;
case GL_UNSIGNED_INT_8_8_8_8:
if (format == GL_RGBA) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (red[i] * 255.0F)) << 24)
| (((GLuint) (green[i] * 255.0F)) << 16)
| (((GLuint) (blue[i] * 255.0F)) << 8)
| (((GLuint) (alpha[i] * 255.0F)) );
}
}
else if (format == GL_BGRA) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (blue[i] * 255.0F)) << 24)
| (((GLuint) (green[i] * 255.0F)) << 16)
| (((GLuint) (red[i] * 255.0F)) << 8)
| (((GLuint) (alpha[i] * 255.0F)) );
}
}
else if (format == GL_ABGR_EXT) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (alpha[i] * 255.0F)) << 24)
| (((GLuint) (blue[i] * 255.0F)) << 16)
| (((GLuint) (green[i] * 255.0F)) << 8)
| (((GLuint) (red[i] * 255.0F)) );
}
}
break;
case GL_UNSIGNED_INT_8_8_8_8_REV:
if (format == GL_RGBA) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (red[i] * 255.0F)) )
| (((GLuint) (green[i] * 255.0F)) << 8)
| (((GLuint) (blue[i] * 255.0F)) << 16)
| (((GLuint) (alpha[i] * 255.0F)) << 24);
}
}
else if (format == GL_BGRA) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (blue[i] * 255.0F)) )
| (((GLuint) (green[i] * 255.0F)) << 8)
| (((GLuint) (red[i] * 255.0F)) << 16)
| (((GLuint) (alpha[i] * 255.0F)) << 24);
}
}
else if (format == GL_ABGR_EXT) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (alpha[i] * 255.0F)) )
| (((GLuint) (blue[i] * 255.0F)) << 8)
| (((GLuint) (green[i] * 255.0F)) << 16)
| (((GLuint) (red[i] * 255.0F)) << 24);
}
}
break;
case GL_UNSIGNED_INT_10_10_10_2:
if (format == GL_RGBA) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (red[i] * 1023.0F)) << 22)
| (((GLuint) (green[i] * 1023.0F)) << 12)
| (((GLuint) (blue[i] * 1023.0F)) << 2)
| (((GLuint) (alpha[i] * 3.0F)) );
}
}
else if (format == GL_BGRA) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (blue[i] * 1023.0F)) << 22)
| (((GLuint) (green[i] * 1023.0F)) << 12)
| (((GLuint) (red[i] * 1023.0F)) << 2)
| (((GLuint) (alpha[i] * 3.0F)) );
}
}
else if (format == GL_ABGR_EXT) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (alpha[i] * 1023.0F)) << 22)
| (((GLuint) (blue[i] * 1023.0F)) << 12)
| (((GLuint) (green[i] * 1023.0F)) << 2)
| (((GLuint) (red[i] * 3.0F)) );
}
}
break;
case GL_UNSIGNED_INT_2_10_10_10_REV:
if (format == GL_RGBA) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (red[i] * 1023.0F)) )
| (((GLuint) (green[i] * 1023.0F)) << 10)
| (((GLuint) (blue[i] * 1023.0F)) << 20)
| (((GLuint) (alpha[i] * 3.0F)) << 30);
}
}
else if (format == GL_BGRA) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (blue[i] * 1023.0F)) )
| (((GLuint) (green[i] * 1023.0F)) << 10)
| (((GLuint) (red[i] * 1023.0F)) << 20)
| (((GLuint) (alpha[i] * 3.0F)) << 30);
}
}
else if (format == GL_ABGR_EXT) {
GLuint *dst = (GLuint *) destination;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (alpha[i] * 1023.0F)) )
| (((GLuint) (blue[i] * 1023.0F)) << 10)
| (((GLuint) (green[i] * 1023.0F)) << 20)
| (((GLuint) (red[i] * 3.0F)) << 30);
}
}
break;
default:
gl_problem( ctx, "bad type in gl_pack_rgba_span" );
}
}
}
/*
* New (3.3) functions
*/
#define SWAP2BYTE(VALUE) \
{ \
GLubyte *bytes = (GLubyte *) &(VALUE); \
GLubyte tmp = bytes[0]; \
bytes[0] = bytes[1]; \
bytes[1] = tmp; \
}
#define SWAP4BYTE(VALUE) \
{ \
GLubyte *bytes = (GLubyte *) &(VALUE); \
GLubyte tmp = bytes[0]; \
bytes[0] = bytes[3]; \
bytes[3] = tmp; \
tmp = bytes[1]; \
bytes[1] = bytes[2]; \
bytes[2] = tmp; \
}
static void
extract_uint_indexes(GLuint n, GLuint indexes[],
GLenum srcFormat, GLenum srcType, const GLvoid *src,
const struct gl_pixelstore_attrib *unpack )
{
assert(srcFormat == GL_COLOR_INDEX);
ASSERT(srcType == GL_BITMAP ||
srcType == GL_UNSIGNED_BYTE ||
srcType == GL_BYTE ||
srcType == GL_UNSIGNED_SHORT ||
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
srcType == GL_FLOAT);
switch (srcType) {
case GL_BITMAP:
{
GLubyte *ubsrc = (GLubyte *) src;
if (unpack->LsbFirst) {
GLubyte mask = 1 << (unpack->SkipPixels & 0x7);
GLuint i;
for (i = 0; i < n; i++) {
indexes[i] = (*ubsrc & mask) ? 1 : 0;
if (mask == 128) {
mask = 1;
ubsrc++;
}
else {
mask = mask << 1;
}
}
}
else {
GLubyte mask = 128 >> (unpack->SkipPixels & 0x7);
GLuint i;
for (i = 0; i < n; i++) {
indexes[i] = (*ubsrc & mask) ? 1 : 0;
if (mask == 1) {
mask = 128;
ubsrc++;
}
else {
mask = mask >> 1;
}
}
}
}
break;
case GL_UNSIGNED_BYTE:
{
GLuint i;
const GLubyte *s = (const GLubyte *) src;
for (i = 0; i < n; i++)
indexes[i] = s[i];
}
break;
case GL_BYTE:
{
GLuint i;
const GLbyte *s = (const GLbyte *) src;
for (i = 0; i < n; i++)
indexes[i] = s[i];
}
break;
case GL_UNSIGNED_SHORT:
{
GLuint i;
const GLushort *s = (const GLushort *) src;
if (unpack->SwapBytes) {
for (i = 0; i < n; i++) {
GLushort value = s[i];
SWAP2BYTE(value);
indexes[i] = value;
}
}
else {
for (i = 0; i < n; i++)
indexes[i] = s[i];
}
}
break;
case GL_SHORT:
{
GLuint i;
const GLshort *s = (const GLshort *) src;
if (unpack->SwapBytes) {
for (i = 0; i < n; i++) {
GLshort value = s[i];
SWAP2BYTE(value);
indexes[i] = value;
}
}
else {
for (i = 0; i < n; i++)
indexes[i] = s[i];
}
}
break;
case GL_UNSIGNED_INT:
{
GLuint i;
const GLuint *s = (const GLuint *) src;
if (unpack->SwapBytes) {
for (i = 0; i < n; i++) {
GLuint value = s[i];
SWAP4BYTE(value);
indexes[i] = value;
}
}
else {
for (i = 0; i < n; i++)
indexes[i] = s[i];
}
}
break;
case GL_INT:
{
GLuint i;
const GLint *s = (const GLint *) src;
if (unpack->SwapBytes) {
for (i = 0; i < n; i++) {
GLint value = s[i];
SWAP4BYTE(value);
indexes[i] = value;
}
}
else {
for (i = 0; i < n; i++)
indexes[i] = s[i];
}
}
break;
case GL_FLOAT:
{
GLuint i;
const GLfloat *s = (const GLfloat *) src;
if (unpack->SwapBytes) {
for (i = 0; i < n; i++) {
GLfloat value = s[i];
SWAP4BYTE(value);
indexes[i] = value;
}
}
else {
for (i = 0; i < n; i++)
indexes[i] = s[i];
}
}
break;
default:
gl_problem(NULL, "bad srcType in extract_uint_indexes");
return;
}
}
/*
* This function extracts floating point RGBA values from arbitrary
* image data. srcFormat and srcType are the format and type parameters
* passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
*
* Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
* implements the "Conversion to floating point", "Conversion to RGB",
* and "Final Expansion to RGBA" operations.
*
* Args: n - number of pixels
* rgba - output colors
* srcFormat - format of incoming data
* srcType - datatype of incoming data
* src - source data pointer
* swapBytes - perform byteswapping of incoming data?
*/
static void
extract_float_rgba(GLuint n, GLfloat rgba[][4],
GLenum srcFormat, GLenum srcType, const GLvoid *src,
GLboolean swapBytes)
{
GLint redIndex, greenIndex, blueIndex, alphaIndex;
GLint stride;
GLint rComp, bComp, gComp, aComp;
if (0)
{
int i;
for (i = 0; i<n;i++) {
rgba[i][0] = rgba[i][1] = rgba[i][2] = rgba[i][3] = 0;
}
return;
}
ASSERT(srcFormat == GL_RED ||
srcFormat == GL_GREEN ||
srcFormat == GL_BLUE ||
srcFormat == GL_ALPHA ||
srcFormat == GL_LUMINANCE ||
srcFormat == GL_LUMINANCE_ALPHA ||
srcFormat == GL_INTENSITY ||
srcFormat == GL_RGB ||
srcFormat == GL_BGR ||
srcFormat == GL_RGBA ||
srcFormat == GL_BGRA ||
srcFormat == GL_ABGR_EXT);
ASSERT(srcType == GL_UNSIGNED_BYTE ||
srcType == GL_BYTE ||
srcType == GL_UNSIGNED_SHORT ||
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
srcType == GL_FLOAT ||
srcType == GL_UNSIGNED_BYTE_3_3_2 ||
srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
srcType == GL_UNSIGNED_SHORT_5_6_5 ||
srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
srcType == GL_UNSIGNED_INT_8_8_8_8 ||
srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
srcType == GL_UNSIGNED_INT_10_10_10_2 ||
srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
switch (srcFormat) {
case GL_RED:
redIndex = 0;
greenIndex = blueIndex = alphaIndex = -1;
stride = 1;
break;
case GL_GREEN:
greenIndex = 0;
redIndex = blueIndex = alphaIndex = -1;
stride = 1;
break;
case GL_BLUE:
blueIndex = 0;
redIndex = greenIndex = alphaIndex = -1;
stride = 1;
break;
case GL_ALPHA:
redIndex = greenIndex = blueIndex = -1;
alphaIndex = 0;
stride = 1;
break;
case GL_LUMINANCE:
redIndex = greenIndex = blueIndex = 0;
alphaIndex = -1;
stride = 1;
break;
case GL_LUMINANCE_ALPHA:
redIndex = greenIndex = blueIndex = 0;
alphaIndex = 1;
stride = 2;
break;
case GL_INTENSITY:
redIndex = 0;
greenIndex = blueIndex = alphaIndex = -1;
stride = 1;
break;
case GL_RGB:
redIndex = 0;
greenIndex = 1;
blueIndex = 2;
alphaIndex = -1;
stride = 3;
break;
case GL_BGR:
redIndex = 2;
greenIndex = 1;
blueIndex = 0;
alphaIndex = -1;
stride = 3;
break;
case GL_RGBA:
redIndex = 0;
greenIndex = 1;
blueIndex = 2;
alphaIndex = 3;
rComp = 0;
gComp = 1;
bComp = 2;
aComp = 3;
stride = 4;
break;
case GL_BGRA:
redIndex = 2;
greenIndex = 1;
blueIndex = 0;
alphaIndex = 3;
rComp = 2;
gComp = 1;
bComp = 0;
aComp = 3;
stride = 4;
break;
case GL_ABGR_EXT:
redIndex = 3;
greenIndex = 2;
blueIndex = 1;
alphaIndex = 0;
rComp = 3;
gComp = 2;
bComp = 1;
aComp = 0;
stride = 4;
break;
default:
gl_problem(NULL, "bad srcFormat in extract float data");
return;
}
assert(redIndex >= -1 && redIndex <= 4);
assert(greenIndex >= -1 && greenIndex <= 4);
assert(blueIndex >= -1 && blueIndex <= 4);
assert(alphaIndex >= -1 && alphaIndex <= 4);
#define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
if ((INDEX) < 0) { \
GLuint i; \
for (i = 0; i < n; i++) { \
rgba[i][CHANNEL] = DEFAULT; \
} \
} \
else if (swapBytes) { \
const TYPE *s = (const TYPE *) src; \
GLuint i; \
for (i = 0; i < n; i++) { \
TYPE value = s[INDEX]; \
if (sizeof(TYPE) == 2) { \
SWAP2BYTE(value); \
} \
else if (sizeof(TYPE) == 4) { \
SWAP4BYTE(value); \
} \
rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
s += stride; \
} \
} \
else { \
const TYPE *s = (const TYPE *) src; \
GLuint i; \
for (i = 0; i < n; i++) { \
rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
s += stride; \
} \
}
switch (srcType) {
case GL_UNSIGNED_BYTE:
PROCESS(redIndex, RCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
PROCESS(greenIndex, GCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
PROCESS(blueIndex, BCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
PROCESS(alphaIndex, ACOMP, 1.0F, GLubyte, UBYTE_TO_FLOAT);
break;
case GL_BYTE:
PROCESS(redIndex, RCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
PROCESS(greenIndex, GCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
PROCESS(blueIndex, BCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
PROCESS(alphaIndex, ACOMP, 1.0F, GLbyte, BYTE_TO_FLOAT);
break;
case GL_UNSIGNED_SHORT:
PROCESS(redIndex, RCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
PROCESS(greenIndex, GCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
PROCESS(blueIndex, BCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
PROCESS(alphaIndex, ACOMP, 1.0F, GLushort, USHORT_TO_FLOAT);
break;
case GL_SHORT:
PROCESS(redIndex, RCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
PROCESS(greenIndex, GCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
PROCESS(blueIndex, BCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
PROCESS(alphaIndex, ACOMP, 1.0F, GLshort, SHORT_TO_FLOAT);
break;
case GL_UNSIGNED_INT:
PROCESS(redIndex, RCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
PROCESS(greenIndex, GCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
PROCESS(blueIndex, BCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
PROCESS(alphaIndex, ACOMP, 1.0F, GLuint, UINT_TO_FLOAT);
break;
case GL_INT:
PROCESS(redIndex, RCOMP, 0.0F, GLint, INT_TO_FLOAT);
PROCESS(greenIndex, GCOMP, 0.0F, GLint, INT_TO_FLOAT);
PROCESS(blueIndex, BCOMP, 0.0F, GLint, INT_TO_FLOAT);
PROCESS(alphaIndex, ACOMP, 1.0F, GLint, INT_TO_FLOAT);
break;
case GL_FLOAT:
PROCESS(redIndex, RCOMP, 0.0F, GLfloat, (GLfloat));
PROCESS(greenIndex, GCOMP, 0.0F, GLfloat, (GLfloat));
PROCESS(blueIndex, BCOMP, 0.0F, GLfloat, (GLfloat));
PROCESS(alphaIndex, ACOMP, 1.0F, GLfloat, (GLfloat));
break;
case GL_UNSIGNED_BYTE_3_3_2:
{
const GLubyte *ubsrc = (const GLubyte *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLubyte p = ubsrc[i];
rgba[i][RCOMP] = ((p >> 5) ) * (1.0F / 7.0F);
rgba[i][GCOMP] = ((p >> 2) & 0x7) * (1.0F / 7.0F);
rgba[i][BCOMP] = ((p ) & 0x3) * (1.0F / 3.0F);
rgba[i][ACOMP] = 1.0F;
}
}
break;
case GL_UNSIGNED_BYTE_2_3_3_REV:
{
const GLubyte *ubsrc = (const GLubyte *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLubyte p = ubsrc[i];
rgba[i][RCOMP] = ((p ) & 0x7) * (1.0F / 7.0F);
rgba[i][GCOMP] = ((p >> 3) & 0x7) * (1.0F / 7.0F);
rgba[i][BCOMP] = ((p >> 6) ) * (1.0F / 3.0F);
rgba[i][ACOMP] = 1.0F;
}
}
break;
case GL_UNSIGNED_SHORT_5_6_5:
if (swapBytes) {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
SWAP2BYTE(p);
rgba[i][RCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
rgba[i][BCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
rgba[i][ACOMP] = 1.0F;
}
}
else {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
rgba[i][RCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
rgba[i][BCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
rgba[i][ACOMP] = 1.0F;
}
}
break;
case GL_UNSIGNED_SHORT_5_6_5_REV:
if (swapBytes) {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
SWAP2BYTE(p);
rgba[i][RCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
rgba[i][BCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
rgba[i][ACOMP] = 1.0F;
}
}
else {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
rgba[i][RCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
rgba[i][BCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
rgba[i][ACOMP] = 1.0F;
}
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4:
if (swapBytes) {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
SWAP2BYTE(p);
rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
}
}
else {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
}
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
if (swapBytes) {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
SWAP2BYTE(p);
rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
}
}
else {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
}
}
break;
case GL_UNSIGNED_SHORT_5_5_5_1:
if (swapBytes) {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
SWAP2BYTE(p);
rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
}
}
else {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
}
}
break;
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
if (swapBytes) {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
SWAP2BYTE(p);
rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
}
}
else {
const GLushort *ussrc = (const GLushort *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
}
}
break;
case GL_UNSIGNED_INT_8_8_8_8:
if (swapBytes) {
const GLuint *uisrc = (const GLuint *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLuint p = uisrc[i];
rgba[i][rComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
rgba[i][gComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
rgba[i][bComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
rgba[i][aComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
}
}
else {
const GLuint *uisrc = (const GLuint *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLuint p = uisrc[i];
rgba[i][rComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
rgba[i][gComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
rgba[i][bComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
rgba[i][aComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
}
}
break;
case GL_UNSIGNED_INT_8_8_8_8_REV:
if (swapBytes) {
const GLuint *uisrc = (const GLuint *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLuint p = uisrc[i];
rgba[i][rComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
rgba[i][gComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
rgba[i][bComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
rgba[i][aComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
}
}
else {
const GLuint *uisrc = (const GLuint *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLuint p = uisrc[i];
rgba[i][rComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
rgba[i][gComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
rgba[i][bComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
rgba[i][aComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
}
}
break;
case GL_UNSIGNED_INT_10_10_10_2:
if (swapBytes) {
const GLuint *uisrc = (const GLuint *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLuint p = uisrc[i];
SWAP4BYTE(p);
rgba[i][rComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
rgba[i][gComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][bComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][aComp] = ((p >> 22) ) * (1.0F / 1023.0F);
}
}
else {
const GLuint *uisrc = (const GLuint *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLuint p = uisrc[i];
rgba[i][rComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
rgba[i][gComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][bComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][aComp] = ((p >> 22) ) * (1.0F / 1023.0F);
}
}
break;
case GL_UNSIGNED_INT_2_10_10_10_REV:
if (swapBytes) {
const GLuint *uisrc = (const GLuint *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLuint p = uisrc[i];
SWAP4BYTE(p);
rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
}
}
else {
const GLuint *uisrc = (const GLuint *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLuint p = uisrc[i];
rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
}
}
break;
default:
gl_problem(NULL, "bad srcType in extract float data");
break;
}
}
/*
* Unpack a row of color image data from a client buffer according to
* the pixel unpacking parameters. Apply any enabled pixel transfer
* ops (PixelMap, scale/bias) if the applyTransferOps flag is enabled.
* Return GLubyte values in the specified dest image format.
* This is (or will be) used by glDrawPixels and glTexImage?D().
* Input: ctx - the context
* n - number of pixels in the span
* dstFormat - format of destination color array
* dest - the destination color array
* srcFormat - source image format
* srcType - source image datatype
* source - source image pointer
* unpacking - pixel unpacking parameters
* applyTransferOps - apply scale/bias/lookup-table ops?
*
* XXX perhaps expand this to process whole images someday.
*/
void
_mesa_unpack_ubyte_color_span( const GLcontext *ctx,
GLuint n, GLenum dstFormat, GLubyte dest[],
GLenum srcFormat, GLenum srcType,
const GLvoid *source,
const struct gl_pixelstore_attrib *unpacking,
GLboolean applyTransferOps )
{
ASSERT(dstFormat == GL_ALPHA ||
dstFormat == GL_LUMINANCE ||
dstFormat == GL_LUMINANCE_ALPHA ||
dstFormat == GL_INTENSITY ||
dstFormat == GL_RGB ||
dstFormat == GL_RGBA ||
dstFormat == GL_COLOR_INDEX);
ASSERT(srcFormat == GL_RED ||
srcFormat == GL_GREEN ||
srcFormat == GL_BLUE ||
srcFormat == GL_ALPHA ||
srcFormat == GL_LUMINANCE ||
srcFormat == GL_LUMINANCE_ALPHA ||
srcFormat == GL_INTENSITY ||
srcFormat == GL_RGB ||
srcFormat == GL_BGR ||
srcFormat == GL_RGBA ||
srcFormat == GL_BGRA ||
srcFormat == GL_ABGR_EXT ||
srcFormat == GL_COLOR_INDEX);
ASSERT(srcType == GL_BITMAP ||
srcType == GL_UNSIGNED_BYTE ||
srcType == GL_BYTE ||
srcType == GL_UNSIGNED_SHORT ||
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
srcType == GL_FLOAT ||
srcType == GL_UNSIGNED_BYTE_3_3_2 ||
srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
srcType == GL_UNSIGNED_SHORT_5_6_5 ||
srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
srcType == GL_UNSIGNED_INT_8_8_8_8 ||
srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
srcType == GL_UNSIGNED_INT_10_10_10_2 ||
srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
/* this is intended for RGBA mode */
ASSERT(ctx->Visual->RGBAflag);
applyTransferOps &= (ctx->Pixel.ScaleOrBiasRGBA ||
ctx->Pixel.MapColorFlag);
/* Try simple cases first */
if (!applyTransferOps && srcType == GL_UNSIGNED_BYTE) {
if (dstFormat == GL_RGBA) {
if (srcFormat == GL_RGBA) {
MEMCPY( dest, source, n * 4 * sizeof(GLubyte) );
return;
}
else if (srcFormat == GL_RGB) {
GLuint i;
const GLubyte *src = (const GLubyte *) source;
GLubyte *dst = dest;
for (i = 0; i < n; i++) {
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = 255;
src += 3;
dst += 4;
}
return;
}
}
else if (dstFormat == GL_RGB) {
if (srcFormat == GL_RGB) {
MEMCPY( dest, source, n * 3 * sizeof(GLubyte) );
return;
}
else if (srcFormat == GL_RGBA) {
GLuint i;
const GLubyte *src = (const GLubyte *) source;
GLubyte *dst = dest;
for (i = 0; i < n; i++) {
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
src += 4;
dst += 3;
}
return;
}
}
else if (dstFormat == srcFormat) {
GLint comps = gl_components_in_format(srcFormat);
assert(comps > 0);
MEMCPY( dest, source, n * comps * sizeof(GLubyte) );
return;
}
}
{
/* general solution */
GLfloat rgba[MAX_WIDTH][4];
GLint dstComponents;
GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
GLint dstLuminanceIndex, dstIntensityIndex;
dstComponents = gl_components_in_format( dstFormat );
/* source & dest image formats should have been error checked by now */
assert(dstComponents > 0);
/*
* Extract image data and convert to RGBA floats
*/
assert(n <= MAX_WIDTH);
if (srcFormat == GL_COLOR_INDEX) {
GLuint indexes[MAX_WIDTH];
extract_uint_indexes(n, indexes, srcFormat, srcType, source,
unpacking);
/* shift and offset indexes */
gl_shift_and_offset_ci(ctx, n, indexes);
if (dstFormat == GL_COLOR_INDEX) {
if (applyTransferOps) {
if (ctx->Pixel.MapColorFlag) {
/* Apply lookup table */
gl_map_ci(ctx, n, indexes);
}
if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) {
}
}
/* convert to GLubyte and return */
{
GLuint i;
for (i = 0; i < n; i++) {
dest[i] = (GLubyte) (indexes[i] & 0xff);
}
}
}
else {
/* Convert indexes to RGBA */
gl_map_ci_to_rgba_float(ctx, n, indexes, rgba);
}
}
else {
extract_float_rgba(n, rgba, srcFormat, srcType, source,
unpacking->SwapBytes);
if (applyTransferOps) {
/* scale and bias colors */
gl_scale_and_bias_rgba_float(ctx, n, rgba);
/* color table lookup */
if (ctx->Pixel.MapColorFlag) {
gl_map_rgba_float(ctx, n, rgba);
}
}
}
/*
* XXX This is where more color table lookups, convolution,
* histograms, minmax, color matrix, etc would take place if
* implemented.
* See figure 3.7 in the OpenGL 1.2 specification for more info.
*/
/* clamp to [0,1] */
{
GLuint i;
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
}
}
/* Now determine which color channels we need to produce.
* And determine the dest index (offset) within each color tuple.
*/
switch (dstFormat) {
case GL_ALPHA:
dstAlphaIndex = 0;
dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
dstLuminanceIndex = dstIntensityIndex = -1;
break;
case GL_LUMINANCE:
dstLuminanceIndex = 0;
dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
dstIntensityIndex = -1;
break;
case GL_LUMINANCE_ALPHA:
dstLuminanceIndex = 0;
dstAlphaIndex = 1;
dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
dstIntensityIndex = -1;
break;
case GL_INTENSITY:
dstIntensityIndex = 0;
dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
dstLuminanceIndex = -1;
break;
case GL_RGB:
dstRedIndex = 0;
dstGreenIndex = 1;
dstBlueIndex = 2;
dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
break;
case GL_RGBA:
dstRedIndex = 0;
dstGreenIndex = 1;
dstBlueIndex = 2;
dstAlphaIndex = 3;
dstLuminanceIndex = dstIntensityIndex = -1;
break;
case GL_COLOR_INDEX:
assert(0);
break;
default:
gl_problem(ctx, "bad dstFormat in _mesa_unpack_ubyte_span()");
}
/* Now return the GLubyte data in the requested dstFormat */
if (dstRedIndex >= 0) {
GLubyte *dst = dest;
GLuint i;
for (i = 0; i < n; i++) {
dst[dstRedIndex] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
dst += dstComponents;
}
}
if (dstGreenIndex >= 0) {
GLubyte *dst = dest;
GLuint i;
for (i = 0; i < n; i++) {
dst[dstGreenIndex] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
dst += dstComponents;
}
}
if (dstBlueIndex >= 0) {
GLubyte *dst = dest;
GLuint i;
for (i = 0; i < n; i++) {
dst[dstBlueIndex] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
dst += dstComponents;
}
}
if (dstAlphaIndex >= 0) {
GLubyte *dst = dest;
GLuint i;
for (i = 0; i < n; i++) {
dst[dstAlphaIndex] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
dst += dstComponents;
}
}
if (dstIntensityIndex >= 0) {
GLubyte *dst = dest;
GLuint i;
assert(dstIntensityIndex == 0);
assert(dstComponents == 1);
for (i = 0; i < n; i++) {
/* Intensity comes from red channel */
dst[i] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
}
}
if (dstLuminanceIndex >= 0) {
GLubyte *dst = dest;
GLuint i;
assert(dstLuminanceIndex == 0);
for (i = 0; i < n; i++) {
/* Luminance comes from red channel */
dst[0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
dst += dstComponents;
}
}
}
}
/*
* Unpack a row of color index data from a client buffer according to
* the pixel unpacking parameters. Apply pixel transfer ops if enabled
* and applyTransferOps is true.
* This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
*
* Args: ctx - the context
* n - number of pixels
* dstType - destination datatype
* dest - destination array
* srcType - source pixel type
* source - source data pointer
* unpacking - pixel unpacking parameters
* applyTransferOps - apply offset/bias/lookup ops?
*/
void
_mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
GLenum dstType, GLvoid *dest,
GLenum srcType, const GLvoid *source,
const struct gl_pixelstore_attrib *unpacking,
GLboolean applyTransferOps )
{
ASSERT(srcType == GL_BITMAP ||
srcType == GL_UNSIGNED_BYTE ||
srcType == GL_BYTE ||
srcType == GL_UNSIGNED_SHORT ||
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
srcType == GL_FLOAT);
ASSERT(dstType == GL_UNSIGNED_BYTE ||
dstType == GL_UNSIGNED_SHORT ||
dstType == GL_UNSIGNED_INT);
applyTransferOps &= (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset || ctx->Pixel.MapColorFlag);
/*
* Try simple cases first
*/
if (!applyTransferOps && srcType == GL_UNSIGNED_BYTE
&& dstType == GL_UNSIGNED_BYTE) {
MEMCPY(dest, source, n * sizeof(GLubyte));
}
else if (!applyTransferOps && srcType == GL_UNSIGNED_INT
&& dstType == GL_UNSIGNED_INT && !unpacking->SwapBytes) {
MEMCPY(dest, source, n * sizeof(GLuint));
}
else {
/*
* general solution
*/
GLuint indexes[MAX_WIDTH];
assert(n <= MAX_WIDTH);
extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
unpacking);
if (applyTransferOps) {
if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) {
/* shift and offset indexes */
gl_shift_and_offset_ci(ctx, n, indexes);
}
if (ctx->Pixel.MapColorFlag) {
/* Apply lookup table */
gl_map_ci(ctx, n, indexes);
}
}
/* convert to dest type */
switch (dstType) {
case GL_UNSIGNED_BYTE:
{
GLubyte *dst = (GLubyte *) dest;
GLuint i;
for (i = 0; i < n; i++) {
dst[i] = (GLubyte) (indexes[i] & 0xff);
}
}
break;
case GL_UNSIGNED_SHORT:
{
GLuint *dst = (GLuint *) dest;
GLuint i;
for (i = 0; i < n; i++) {
dst[i] = (GLushort) (indexes[i] & 0xffff);
}
}
break;
case GL_UNSIGNED_INT:
MEMCPY(dest, indexes, n * sizeof(GLuint));
break;
default:
gl_problem(ctx, "bad dstType in _mesa_unpack_index_span");
}
}
}
/*
* Unpack image data. Apply byteswapping, byte flipping (bitmap).
* Return all image data in a contiguous block.
*/
void *
_mesa_unpack_image( GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, const GLvoid *pixels,
const struct gl_pixelstore_attrib *unpack )
{
GLint bytesPerRow, compsPerRow;
GLboolean flipBytes, swap2, swap4;
if (!pixels)
return NULL; /* not necessarily an error */
if (width <= 0 || height <= 0 || depth <= 0)
return NULL; /* generate error later */
if (format == GL_BITMAP) {
bytesPerRow = (width + 7) >> 3;
flipBytes = !unpack->LsbFirst;
swap2 = swap4 = GL_FALSE;
compsPerRow = 0;
}
else {
const GLint bytesPerPixel = gl_bytes_per_pixel(format, type);
const GLint components = gl_components_in_format(format);
GLint bytesPerComp;
if (bytesPerPixel <= 0 || components <= 0)
return NULL; /* bad format or type. generate error later */
bytesPerRow = bytesPerPixel * width;
bytesPerComp = bytesPerPixel / components;
flipBytes = GL_FALSE;
swap2 = (bytesPerComp == 2) && unpack->SwapBytes;
swap4 = (bytesPerComp == 4) && unpack->SwapBytes;
compsPerRow = components * width;
assert(compsPerRow >= width);
}
{
GLubyte *destBuffer = MALLOC(bytesPerRow * height * depth);
GLubyte *dst;
GLint img, row;
if (!destBuffer)
return NULL; /* generate GL_OUT_OF_MEMORY later */
dst = destBuffer;
for (img = 0; img < depth; img++) {
for (row = 0; row < height; row++) {
const GLvoid *src = gl_pixel_addr_in_image(unpack, pixels,
width, height, format, type, img, row, 0);
MEMCPY(dst, src, bytesPerRow);
/* byte flipping/swapping */
if (flipBytes) {
gl_flip_bytes((GLubyte *) dst, bytesPerRow);
}
else if (swap2) {
gl_swap2((GLushort*) dst, compsPerRow);
}
else if (swap4) {
gl_swap4((GLuint*) dst, compsPerRow);
}
dst += bytesPerRow;
}
}
return destBuffer;
}
}