quakeforge/include/QF/image.h

/*
	image.h

	General image handling

	Copyright (C) 2003 Harry Roberts

	Author: Harry Roberts
	Date: Sep 4 2003

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA
*/
#ifndef __QF_image_h
#define __QF_image_h

#include "QF/qtypes.h"

typedef enum QFFormat {
	tex_palette = 0,
	tex_l = 0x1909, //GL_LUMINANCE
	tex_a = 0x1906, //GL_ALPHA
	tex_la = 2,
	tex_rgb = 3,
	tex_rgba = 4,
	tex_frgba = 5,
} QFFormat;

// could not use texture_t as that is used for models.
typedef struct tex_s {
	int         width;
	int         height;
	QFFormat    format;
	union {
		struct {
			int loaded:1;		// 0 if size info only, otherwise data loaded
			int flipped:1;		// 1 if first pixel is bottom instead of top
			int bgr:1;			// 1 if image is bgr (for tex_rgb)
		};
		int     flagbits;		// for eazy zeroing
	};
	const byte *palette;		// 0 = 32 bit, otherwise 8
	byte       *data;
} tex_t;

tex_t *LoadImage (const char *imageFile, int load);

size_t ImageSize (const tex_t *tex, int incl_struct) __attribute__((pure));

typedef struct colcache_s colcache_t;

colcache_t *ColorCache_New (void);
void ColorCache_Delete (colcache_t *cache);
byte ConvertColor (const byte *rgb, const byte *pal, colcache_t *cache);
tex_t *ConvertImage (const tex_t *tex, const byte *pal);

#endif//__QF_image_h