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/**
* \file texformat.h
* Texture formats definitions.
*
* \author Gareth Hughes
*/
/*
* Mesa 3-D graphics library
* Version: 5.1
*
* Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef TEXFORMAT_H
#define TEXFORMAT_H
#include "mtypes.h"
/**
* Mesa internal texture image types.
*
* All texture images must be stored in one of these formats.
*/
enum _format {
/**
* \name Hardware-friendly formats.
*
* Drivers can override the default formats and convert texture images to
* one of these as required. The driver's
* dd_function_table::ChooseTextureFormat function will choose one of these
* formats. These formats are all little endian, as shown below. They will
* be most useful for x86-based PC graphics card drivers.
*
* \note In the default case, some of these formats will be duplicates of
* the generic formats listed below. However, these formats guarantee their
* internal component sizes, while GLchan may vary between GLubyte, GLushort
* and GLfloat.
*/
/*@{*/
/* msb <------ TEXEL BITS -----------> lsb */
/* ---- ---- ---- ---- ---- ---- ---- ---- */
MESA_FORMAT_RGBA8888, /* RRRR RRRR GGGG GGGG BBBB BBBB AAAA AAAA */
MESA_FORMAT_ARGB8888, /* AAAA AAAA RRRR RRRR GGGG GGGG BBBB BBBB */
MESA_FORMAT_RGB888, /* RRRR RRRR GGGG GGGG BBBB BBBB */
MESA_FORMAT_RGB565, /* RRRR RGGG GGGB BBBB */
MESA_FORMAT_ARGB4444, /* AAAA RRRR GGGG BBBB */
MESA_FORMAT_ARGB1555, /* ARRR RRGG GGGB BBBB */
MESA_FORMAT_AL88, /* AAAA AAAA LLLL LLLL */
MESA_FORMAT_RGB332, /* RRRG GGBB */
MESA_FORMAT_A8, /* AAAA AAAA */
MESA_FORMAT_L8, /* LLLL LLLL */
MESA_FORMAT_I8, /* IIII IIII */
MESA_FORMAT_CI8, /* CCCC CCCC */
MESA_FORMAT_YCBCR, /* YYYY YYYY UorV UorV */
MESA_FORMAT_YCBCR_REV, /* UorV UorV YYYY YYYY */
/*@}*/
MESA_FORMAT_RGB_FXT1,
MESA_FORMAT_RGBA_FXT1,
MESA_FORMAT_RGB_DXT1,
MESA_FORMAT_RGBA_DXT1,
MESA_FORMAT_RGBA_DXT3,
MESA_FORMAT_RGBA_DXT5,
#if 0
/**
* \name Upcoming little-endian formats
*/
/*@{*/
/* msb <------ TEXEL BITS -----------> lsb */
/* ---- ---- ---- ---- ---- ---- ---- ---- */
MESA_FORMAT_ABGR8888, /* AAAA AAAA BBBB BBBB GGGG GGGG RRRR RRRR */
MESA_FORMAT_BGRA8888, /* BBBB BBBB GGGG GGGG RRRR RRRR AAAA AAAA */
MESA_FORMAT_BGR888, /* BBBB BBBB GGGG GGGG RRRR RRRR */
MESA_FORMAT_BGR565, /* BBBB BGGG GGGR RRRR */
MESA_FORMAT_BGRA4444, /* BBBB GGGG RRRR AAAA */
MESA_FORMAT_BGRA5551, /* BBBB BGGG GGRR RRRA */
MESA_FORMAT_LA88, /* LLLL LLLL AAAA AAAA */
MESA_FORMAT_BGR233, /* BBGG GRRR */
/*@}*/
#endif
/**
* \name Generic GLchan-based formats.
*
* These are the default formats used by the software rasterizer and, unless
* the driver overrides the texture image functions, incoming images will be
* converted to one of these formats. Components are arrays of GLchan
* values, so there will be no big/little endian issues.
*
* \note Because these are based on the GLchan data type, one cannot assume 8
* bits per channel with these formats. If you require GLubyte channels,
* use one of the hardware formats above.
*/
/*@{*/
MESA_FORMAT_RGBA,
MESA_FORMAT_RGB,
MESA_FORMAT_ALPHA,
MESA_FORMAT_LUMINANCE,
MESA_FORMAT_LUMINANCE_ALPHA,
MESA_FORMAT_INTENSITY,
MESA_FORMAT_COLOR_INDEX,
MESA_FORMAT_DEPTH_COMPONENT
/*@}*/
};
extern GLboolean
_mesa_is_hardware_tex_format( const struct gl_texture_format *format );
extern const struct gl_texture_format *
_mesa_choose_tex_format( GLcontext *ctx, GLint internalFormat,
GLenum format, GLenum type );
extern GLint
_mesa_base_compressed_texformat(GLcontext *ctx, GLint intFormat);
/** The default formats, GLchan per component */
/*@{*/
extern const struct gl_texture_format _mesa_texformat_rgba;
extern const struct gl_texture_format _mesa_texformat_rgb;
extern const struct gl_texture_format _mesa_texformat_alpha;
extern const struct gl_texture_format _mesa_texformat_luminance;
extern const struct gl_texture_format _mesa_texformat_luminance_alpha;
extern const struct gl_texture_format _mesa_texformat_intensity;
extern const struct gl_texture_format _mesa_texformat_color_index;
extern const struct gl_texture_format _mesa_texformat_depth_component;
/*@}*/
/** \name The hardware-friendly formats */
/*@{*/
extern const struct gl_texture_format _mesa_texformat_rgba8888;
extern const struct gl_texture_format _mesa_texformat_argb8888;
extern const struct gl_texture_format _mesa_texformat_rgb888;
extern const struct gl_texture_format _mesa_texformat_rgb565;
extern const struct gl_texture_format _mesa_texformat_argb4444;
extern const struct gl_texture_format _mesa_texformat_argb1555;
extern const struct gl_texture_format _mesa_texformat_al88;
extern const struct gl_texture_format _mesa_texformat_rgb332;
extern const struct gl_texture_format _mesa_texformat_a8;
extern const struct gl_texture_format _mesa_texformat_l8;
extern const struct gl_texture_format _mesa_texformat_i8;
extern const struct gl_texture_format _mesa_texformat_ci8;
extern const struct gl_texture_format _mesa_texformat_ycbcr;
extern const struct gl_texture_format _mesa_texformat_ycbcr_rev;
extern const struct gl_texture_format _mesa_texformat_rgb_fxt1;
extern const struct gl_texture_format _mesa_texformat_rgba_fxt1;
extern const struct gl_texture_format _mesa_texformat_rgb_dxt1;
extern const struct gl_texture_format _mesa_texformat_rgba_dxt1;
extern const struct gl_texture_format _mesa_texformat_rgba_dxt3;
extern const struct gl_texture_format _mesa_texformat_rgba_dxt5;
/*@}*/
/** \name The null format */
/*@{*/
extern const struct gl_texture_format _mesa_null_texformat;
/*@}*/
#endif
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