/*--------------------------------------------------
 *
 *  myimage.h - Thanks to Marek Czernuszenko
 *
 *--------------------------------------------------*/
//******************************************************
// $Author: marek $                                  
// $Date: 1995/03/31 23:31:53 $                       
// $Revision: 1.19 $                                  
/* $Log: myimage.h,v $
 * Revision 1.19  1995/03/31  23:31:53  marek
 * Very good version - texture maps, blending
 * works for both GL and OpenGL.
 *
 * Revision 1.18  1995/03/30  16:37:00  marek
 * Version: opengl/gl works
 * * onother man on the slope
 * * runway
 *
 * Revision 1.12  1995/03/20  18:46:21  marek
 * Good version (just before having elevation data file)
 *
 * Revision 1.10  1995/03/10  20:58:08  marek
 * Pretty good version. but: trees dont move
 *
 * Revision 1.9  1995/03/10  20:53:06  marek
 *  Lighting fixed  .
 *
 * Revision 1.4  1995/03/07  20:37:05  marek
 * *** empty log message ***
 *
 * Revision 1.3  1995/02/28  00:36:27  marek
 * cleaning, moving towards 2 elevations, 2 normals (not done jet)
 *
 *  Revision 1.2  1995/02/23  21:26:32  marek
 *  Added RCS header
 */ 
//******************************************************
#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 

#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;
typedef unsigned short ushort ;
typedef unsigned long  ulong ;

IMAGE *iopen(char *, register char * , unsigned int type=0, unsigned int dim=0, unsigned int xsize=0, unsigned int ysize=0, unsigned int zsize=0 );
IMAGE *icreate();
int iclose( register IMAGE *);

extern "C" {
extern void sizeofimage( char *, int *, int *);
extern unsigned long *longimagedata(char *);
}

int putrow( register IMAGE *, unsigned short*, unsigned , unsigned );
int getrow( register IMAGE *, unsigned short*, unsigned , unsigned );

int rgbtocpack(ushort*,ushort*,ushort*,  ulong *, int );
int rgbatocpack(ushort*,ushort*,ushort*, ushort*,  ulong *, int );
int bwtocpack(ushort *, ulong *, int);
int cpacktorgb(ulong *, ushort*,ushort*,ushort*, int);

unsigned short *ibufalloc();
#define IMAGEDEF		/* for backwards compatibility */
#endif	/* !__GL_IMAGE_H__ */
  
/*--------------------------------------------------*/