WebSVN - shark - Blame - Rev 55 - /shark/trunk/ports/mesa/src/texformat.h

Rev	Author	Line No.	Line
55	pj	1	/* $Id: texformat.h,v 1.1 2003-02-28 11:42:05 pj Exp $ */
		2
		3	/*
		4	* Mesa 3-D graphics library
		5	* Version: 4.1
		6	*
		7	* Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
		8	*
		9	* Permission is hereby granted, free of charge, to any person obtaining a
		10	* copy of this software and associated documentation files (the "Software"),
		11	* to deal in the Software without restriction, including without limitation
		12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		13	* and/or sell copies of the Software, and to permit persons to whom the
		14	* Software is furnished to do so, subject to the following conditions:
		15	*
		16	* The above copyright notice and this permission notice shall be included
		17	* in all copies or substantial portions of the Software.
		18	*
		19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
		20	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		22	* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
		23	* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
		24	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
		25	*
		26	* Author:
		27	* Gareth Hughes
		28	*/
		29
		30	#ifndef TEXFORMAT_H
		31	#define TEXFORMAT_H
		32
		33	#include "mtypes.h"
		34
		35
		36	/*
		37	* The Mesa internal texture image types.
		38	* All texture images must be stored in one of these formats.
		39	*/
		40	enum _format {
		41	/* Hardware-friendly formats. Drivers can override the default
		42	* formats and convert texture images to one of these as required.
		43	* The driver's ChooseTextureFormat() function will choose one of
		44	* these formats.
		45	* These formats are all little endian, as shown below. They will be
		46	* most useful for x86-based PC graphics card drivers.
		47	*
		48	* NOTE: In the default case, some of these formats will be
		49	* duplicates of the generic formats listed below. However, these
		50	* formats guarantee their internal component sizes, while GLchan may
		51	* vary betwen GLubyte, GLushort and GLfloat.
		52	*/
		53	/* msb <------ TEXEL BITS -----------> lsb */
		54	/* ---- ---- ---- ---- ---- ---- ---- ---- */
		55	MESA_FORMAT_RGBA8888, /* RRRR RRRR GGGG GGGG BBBB BBBB AAAA AAAA */
		56	MESA_FORMAT_ARGB8888, /* AAAA AAAA RRRR RRRR GGGG GGGG BBBB BBBB */
		57	MESA_FORMAT_RGB888, /* RRRR RRRR GGGG GGGG BBBB BBBB */
		58	MESA_FORMAT_RGB565, /* RRRR RGGG GGGB BBBB */
		59	MESA_FORMAT_ARGB4444, /* AAAA RRRR GGGG BBBB */
		60	MESA_FORMAT_ARGB1555, /* ARRR RRGG GGGB BBBB */
		61	MESA_FORMAT_AL88, /* AAAA AAAA LLLL LLLL */
		62	MESA_FORMAT_RGB332, /* RRRG GGBB */
		63	MESA_FORMAT_A8, /* AAAA AAAA */
		64	MESA_FORMAT_L8, /* LLLL LLLL */
		65	MESA_FORMAT_I8, /* IIII IIII */
		66	MESA_FORMAT_CI8, /* CCCC CCCC */
		67	MESA_FORMAT_YCBCR, /* YYYY YYYY UorV UorV */
		68	MESA_FORMAT_YCBCR_REV, /* UorV UorV YYYY YYYY */
		69
		70	#if 0
		71	/* upcoming little-endian formats: */
		72
		73	/* msb <------ TEXEL BITS -----------> lsb */
		74	/* ---- ---- ---- ---- ---- ---- ---- ---- */
		75	MESA_FORMAT_ABGR8888, /* AAAA AAAA BBBB BBBB GGGG GGGG RRRR RRRR */
		76	MESA_FORMAT_BGRA8888, /* BBBB BBBB GGGG GGGG RRRR RRRR AAAA AAAA */
		77	MESA_FORMAT_BGR888, /* BBBB BBBB GGGG GGGG RRRR RRRR */
		78	MESA_FORMAT_BGR565, /* BBBB BGGG GGGR RRRR */
		79	MESA_FORMAT_BGRA4444, /* BBBB GGGG RRRR AAAA */
		80	MESA_FORMAT_BGRA5551, /* BBBB BGGG GGRR RRRA */
		81	MESA_FORMAT_LA88, /* LLLL LLLL AAAA AAAA */
		82	MESA_FORMAT_BGR233, /* BBGG GRRR */
		83	#endif
		84
		85	/* Generic GLchan-based formats. These are the default formats used
		86	* by the software rasterizer and, unless the driver overrides the
		87	* texture image functions, incoming images will be converted to one
		88	* of these formats. Components are arrays of GLchan values, so
		89	* there will be no big/little endian issues.
		90	*
		91	* NOTE: Because these are based on the GLchan datatype, one cannot
		92	* assume 8 bits per channel with these formats. If you require
		93	* GLubyte channels, use one of the hardware formats above.
		94	*/
		95	MESA_FORMAT_RGBA,
		96	MESA_FORMAT_RGB,
		97	MESA_FORMAT_ALPHA,
		98	MESA_FORMAT_LUMINANCE,
		99	MESA_FORMAT_LUMINANCE_ALPHA,
		100	MESA_FORMAT_INTENSITY,
		101	MESA_FORMAT_COLOR_INDEX,
		102	MESA_FORMAT_DEPTH_COMPONENT
		103	};
		104
		105
		106	extern GLboolean
		107	_mesa_is_hardware_tex_format( const struct gl_texture_format *format );
		108
		109	extern const struct gl_texture_format *
		110	_mesa_choose_tex_format( GLcontext *ctx, GLint internalFormat,
		111	GLenum format, GLenum type );
		112
		113	extern GLint
		114	_mesa_base_compressed_texformat(GLcontext *ctx, GLint intFormat);
		115
		116
		117	/* The default formats, GLchan per component:
		118	*/
		119	extern const struct gl_texture_format _mesa_texformat_rgba;
		120	extern const struct gl_texture_format _mesa_texformat_rgb;
		121	extern const struct gl_texture_format _mesa_texformat_alpha;
		122	extern const struct gl_texture_format _mesa_texformat_luminance;
		123	extern const struct gl_texture_format _mesa_texformat_luminance_alpha;
		124	extern const struct gl_texture_format _mesa_texformat_intensity;
		125	extern const struct gl_texture_format _mesa_texformat_color_index;
		126	extern const struct gl_texture_format _mesa_texformat_depth_component;
		127
		128	/* The hardware-friendly formats:
		129	*/
		130	extern const struct gl_texture_format _mesa_texformat_rgba8888;
		131	extern const struct gl_texture_format _mesa_texformat_argb8888;
		132	extern const struct gl_texture_format _mesa_texformat_rgb888;
		133	extern const struct gl_texture_format _mesa_texformat_rgb565;
		134	extern const struct gl_texture_format _mesa_texformat_argb4444;
		135	extern const struct gl_texture_format _mesa_texformat_argb1555;
		136	extern const struct gl_texture_format _mesa_texformat_al88;
		137	extern const struct gl_texture_format _mesa_texformat_rgb332;
		138	extern const struct gl_texture_format _mesa_texformat_a8;
		139	extern const struct gl_texture_format _mesa_texformat_l8;
		140	extern const struct gl_texture_format _mesa_texformat_i8;
		141	extern const struct gl_texture_format _mesa_texformat_ci8;
		142	extern const struct gl_texture_format _mesa_texformat_ycbcr;
		143	extern const struct gl_texture_format _mesa_texformat_ycbcr_rev;
		144
		145	/* The null format:
		146	*/
		147	extern const struct gl_texture_format _mesa_null_texformat;
		148
		149	#endif

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