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SPLASH.H
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1990-09-24
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/*
splash.h
% declarations for PC display stuff
5/16/89 by Ted.
OWL-PC 1.2
Copyright (c) 1989 by Oakland Group, Inc.
ALL RIGHTS RESERVED.
Revision History:
-----------------
3/28/90 jmd ansi-fied
9/24/90 ted Added structure tags in struct - defining macros.
*/
/* -------------------------------------------------------------------------- */
/* Splash Image File I/O related definitions */
typedef unsigned long S_LoadMask;
#define ID_SPLASH 0x3250 /* 'P2' */
#define T_PIXMAP 0x4D50 /* 'PM' */
#define T_COLMAP 0x4D43 /* 'CM' */
#define B_PIXMAP 0x0001L
#define B_COLMAP 0x0008L
/* Pixmap compression types */
#define PMC_None 0
#define PMC_Brun 1
/* -------------------------------------------------------------------------- */
typedef struct _STifPtr {
unsigned short tag;
unsigned long foffset;
} S_TifPtr;
typedef byte S_RGB[3]; /* red, green, blue: normalized color triplet */
#define S_MAXTAGS 20
#define S_FileHdr_def(n) \
{ unsigned short ident; unsigned short nentries; S_TifPtr tags[n]; }
typedef struct _S_FileHdr S_FileHdr_def(S_MAXTAGS) S_FileHdr;
typedef struct _S_FileHdr1 S_FileHdr_def(1) S_FileHdr1;
#define S_MAXCOLORS 256
#define S_Colmap_def(n) \
{ unsigned short firstpix; unsigned short nentries; S_RGB rgblevs[n]; }
typedef struct _S_Colmap S_Colmap_def(S_MAXCOLORS) S_Colmap;
typedef struct _SPixmap {
unsigned long pixbuf; /* pointer to pixel map memory buffer. */
unsigned short bytewidth; /* number of bytes in a line of image. */
unsigned short width, height; /* width and height of pixel image. */
byte nshift; /* number of unused pixels at left of each line */
byte onboard; /* flag for pixbuf in display memory */
byte nplanes; /* number of bitplanes in image. */
byte pixbits; /* number of bits per pixel in a plane. */
byte rbits; /* number of bits per pixel of red value */
byte gbits; /* number of bits per pixel of green value */
byte bbits; /* number of bits per pixel of blue value */
byte comptype; /* type of compression applied to pixbuf */
} S_Pixmap;
#define S_pmwidth(pm) (pm)->width
#define S_pmheight(pm) (pm)->height
#define S_pmcomptype(pm) (pm)->comptype
/* PCSPLASH.C - Note: for PC only */
extern pmap_type pmap_LoadSplash(FILE *fd, ocolmap_type crange);
/* -------------------------------------------------------------------------- */