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/*
* $Id: image.h,v 2.0.2.1 2006/01/03 09:17:40 markus Exp $
*/
#ifndef __GL_IMAGE_H__
#define __GL_IMAGE_H__
/*
* Defines for image files . . . .
*
* Paul Haeberli - 1984
* Look in /usr/people/4Dgifts/iristools/imgtools for example code!
*
*/
#include <stdio.h>
#define IMAGIC 0732
/* colormap of images */
#define CM_NORMAL 0 /* file contains rows of values which
* are either RGB values (zsize == 3)
* or greyramp values (zsize == 1) */
#define CM_DITHERED 1
#define CM_SCREEN 2 /* file contains data which is a screen
* image; getrow returns buffer which
* can be displayed directly with
* writepixels */
#define CM_COLORMAP 3 /* a colormap file */
#define TYPEMASK 0xff00
#define BPPMASK 0x00ff
#define ITYPE_VERBATIM 0x0000
#define ITYPE_RLE 0x0100
#define ISRLE(type) (((type) & 0xff00) == ITYPE_RLE)
#define ISVERBATIM(type) (((type) & 0xff00) == ITYPE_VERBATIM)
#define BPP(type) ((type) & BPPMASK)
#define RLE(bpp) (ITYPE_RLE | (bpp))
#define VERBATIM(bpp) (ITYPE_VERBATIM | (bpp))
#define IBUFSIZE(pixels) ((pixels+(pixels>>6))<<2)
#define RLE_NOP 0x00
#define ierror(p) (((p)->flags&_IOERR)!=0)
#define ifileno(p) ((p)->file)
#define getpix(p) (--(p)->cnt>=0 ? *(p)->ptr++ : ifilbuf(p))
#define putpix(p,x) (--(p)->cnt>=0 \
? ((int)(*(p)->ptr++=(unsigned)(x))) \
: iflsbuf(p,(unsigned)(x)))
typedef struct {
unsigned short imagic; /* stuff saved on disk . . */
unsigned short type;
unsigned short dim;
unsigned short xsize;
unsigned short ysize;
unsigned short zsize;
unsigned long min;
unsigned long max;
unsigned long wastebytes;
char name[80];
unsigned long colormap;
long file; /* stuff used in core only */
unsigned short flags;
short dorev;
short x;
short y;
short z;
short cnt;
unsigned short *ptr;
unsigned short *base;
unsigned short *tmpbuf;
unsigned long offset;
unsigned long rleend; /* for rle images */
unsigned long *rowstart; /* for rle images */
long *rowsize; /* for rle images */
} IMAGE;
IMAGE *iopen();
IMAGE *icreate();
int iclose(IMAGE *);
int putrow(IMAGE *,short *,unsigned int,unsigned int);
int i_seterror(void (*)());
unsigned short *ibufalloc();
#define IMAGEDEF /* for backwards compatibility */
#endif /* !__GL_IMAGE_H__ */
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