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|
/*
* Mesa 3-D graphics library
* Version: 7.7
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (c) 2008-2009 VMware, Inc.
*
* 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.
*/
/**
* \file texformat.c
* Texture formats.
*
* \author Gareth Hughes
* \author Brian Paul
*/
#include "context.h"
#include "mfeatures.h"
#include "mtypes.h"
#include "texcompress.h"
#include "texformat.h"
#define RETURN_IF_SUPPORTED(f) do { \
if (ctx->TextureFormatSupported[f]) \
return f; \
} while (0)
/**
* Choose an appropriate texture format given the format, type and
* internalFormat parameters passed to glTexImage().
*
* \param ctx the GL context.
* \param internalFormat user's prefered internal texture format.
* \param format incoming image pixel format.
* \param type incoming image data type.
*
* \return a pointer to a gl_texture_format object which describes the
* choosen texture format, or NULL on failure.
*
* This is called via dd_function_table::ChooseTextureFormat. Hardware drivers
* will typically override this function with a specialized version.
*/
gl_format
_mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
GLenum format, GLenum type )
{
(void) format;
(void) type;
switch (internalFormat) {
/* shallow RGBA formats */
case 4:
case GL_RGBA:
if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
} else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
}
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
case GL_RGBA8:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
case GL_RGB5_A1:
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
break;
case GL_RGBA2:
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444_REV); /* just to test another format*/
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
break;
case GL_RGBA4:
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
break;
/* deep RGBA formats */
case GL_RGB10_A2:
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
case GL_RGBA12:
case GL_RGBA16:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
/* shallow RGB formats */
case 3:
case GL_RGB:
case GL_RGB8:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
case GL_R3_G3_B2:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB332);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
case GL_RGB4:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565_REV); /* just to test another format */
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
break;
case GL_RGB5:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
break;
/* deep RGB formats */
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
/* Alpha formats */
case GL_ALPHA:
case GL_ALPHA4:
case GL_ALPHA8:
RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
break;
case GL_ALPHA12:
case GL_ALPHA16:
RETURN_IF_SUPPORTED(MESA_FORMAT_A16);
RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
break;
/* Luminance formats */
case 1:
case GL_LUMINANCE:
case GL_LUMINANCE4:
case GL_LUMINANCE8:
RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
break;
case GL_LUMINANCE12:
case GL_LUMINANCE16:
RETURN_IF_SUPPORTED(MESA_FORMAT_L16);
RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
break;
/* Luminance/Alpha formats */
case GL_LUMINANCE4_ALPHA4:
RETURN_IF_SUPPORTED(MESA_FORMAT_AL44);
RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
break;
case 2:
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE6_ALPHA2:
case GL_LUMINANCE8_ALPHA8:
RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
break;
case GL_LUMINANCE12_ALPHA4:
case GL_LUMINANCE12_ALPHA12:
case GL_LUMINANCE16_ALPHA16:
RETURN_IF_SUPPORTED(MESA_FORMAT_AL1616);
RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
break;
case GL_INTENSITY:
case GL_INTENSITY4:
case GL_INTENSITY8:
RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
break;
case GL_INTENSITY12:
case GL_INTENSITY16:
RETURN_IF_SUPPORTED(MESA_FORMAT_I16);
RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
break;
case GL_COLOR_INDEX:
case GL_COLOR_INDEX1_EXT:
case GL_COLOR_INDEX2_EXT:
case GL_COLOR_INDEX4_EXT:
case GL_COLOR_INDEX12_EXT:
case GL_COLOR_INDEX16_EXT:
case GL_COLOR_INDEX8_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_CI8);
break;
default:
; /* fallthrough */
}
if (ctx->Extensions.ARB_depth_texture) {
switch (internalFormat) {
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32:
RETURN_IF_SUPPORTED(MESA_FORMAT_Z32);
RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
break;
case GL_DEPTH_COMPONENT16:
RETURN_IF_SUPPORTED(MESA_FORMAT_Z16);
RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
default:
; /* fallthrough */
}
}
switch (internalFormat) {
case GL_COMPRESSED_ALPHA_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
break;
case GL_COMPRESSED_LUMINANCE_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
break;
case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
break;
case GL_COMPRESSED_INTENSITY_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
break;
case GL_COMPRESSED_RGB_ARB:
if (ctx->Extensions.EXT_texture_compression_s3tc ||
ctx->Extensions.S3_s3tc)
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
if (ctx->Extensions.TDFX_texture_compression_FXT1)
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
case GL_COMPRESSED_RGBA_ARB:
if (ctx->Extensions.EXT_texture_compression_s3tc ||
ctx->Extensions.S3_s3tc)
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
if (ctx->Extensions.TDFX_texture_compression_FXT1)
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
break;
default:
; /* fallthrough */
}
if (ctx->Extensions.MESA_ycbcr_texture) {
if (internalFormat == GL_YCBCR_MESA) {
if (type == GL_UNSIGNED_SHORT_8_8_MESA)
RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);
else
RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);
}
}
#if FEATURE_texture_fxt1
if (ctx->Extensions.TDFX_texture_compression_FXT1) {
switch (internalFormat) {
case GL_COMPRESSED_RGB_FXT1_3DFX:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
break;
case GL_COMPRESSED_RGBA_FXT1_3DFX:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
break;
default:
; /* fallthrough */
}
}
#endif
#if FEATURE_texture_s3tc
if (ctx->Extensions.EXT_texture_compression_s3tc) {
switch (internalFormat) {
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
break;
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT1);
break;
case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
break;
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT5);
break;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.S3_s3tc) {
switch (internalFormat) {
case GL_RGB_S3TC:
case GL_RGB4_S3TC:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
break;
case GL_RGBA_S3TC:
case GL_RGBA4_S3TC:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
break;
default:
; /* fallthrough */
}
}
#endif
if (ctx->Extensions.ARB_texture_float) {
switch (internalFormat) {
case GL_ALPHA16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
break;
case GL_ALPHA32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
break;
case GL_LUMINANCE16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
break;
case GL_LUMINANCE32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
break;
case GL_LUMINANCE_ALPHA16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
break;
case GL_LUMINANCE_ALPHA32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
break;
case GL_INTENSITY16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
break;
case GL_INTENSITY32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
break;
case GL_RGB16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
break;
case GL_RGB32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
break;
case GL_RGBA16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
break;
case GL_RGBA32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
break;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.EXT_packed_depth_stencil) {
switch (internalFormat) {
case GL_DEPTH_STENCIL_EXT:
case GL_DEPTH24_STENCIL8_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_S8);
RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
break;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.ATI_envmap_bumpmap) {
switch (internalFormat) {
case GL_DUDV_ATI:
case GL_DU8DV8_ATI:
RETURN_IF_SUPPORTED(MESA_FORMAT_DUDV8);
break;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.MESA_texture_signed_rgba) {
switch (internalFormat) {
case GL_RGBA_SNORM:
case GL_RGBA8_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
break;
default:
; /* fallthrough */
}
}
if (ctx->VersionMajor * 10 + ctx->VersionMinor >= 31) {
switch (internalFormat) {
case GL_RED_SNORM:
case GL_R8_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R8);
break;
case GL_RG_SNORM:
case GL_RG8_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG88);
break;
case GL_RGB_SNORM:
case GL_RGB8_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
break;
case GL_RGBA_SNORM:
case GL_RGBA8_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
break;
case GL_R16_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R_16);
break;
case GL_RG16_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG_16);
break;
case GL_RGB16_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGB_16);
break;
case GL_RGBA16_SNORM:
RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
break;
default:
; /* fall-through */
}
}
#if FEATURE_EXT_texture_sRGB
if (ctx->Extensions.EXT_texture_sRGB) {
switch (internalFormat) {
case GL_SRGB_EXT:
case GL_SRGB8_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_SRGB_ALPHA_EXT:
case GL_SRGB8_ALPHA8_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_SLUMINANCE_EXT:
case GL_SLUMINANCE8_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_SLUMINANCE_ALPHA_EXT:
case GL_SLUMINANCE8_ALPHA8_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_COMPRESSED_SLUMINANCE_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_COMPRESSED_SRGB_EXT:
#if FEATURE_texture_s3tc
if (ctx->Extensions.EXT_texture_compression_s3tc)
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
#endif
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_COMPRESSED_SRGB_ALPHA_EXT:
#if FEATURE_texture_s3tc
if (ctx->Extensions.EXT_texture_compression_s3tc)
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
#endif
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
#if FEATURE_texture_s3tc
case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
if (ctx->Extensions.EXT_texture_compression_s3tc)
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
if (ctx->Extensions.EXT_texture_compression_s3tc)
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT1);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
if (ctx->Extensions.EXT_texture_compression_s3tc)
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
if (ctx->Extensions.EXT_texture_compression_s3tc)
RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT5);
RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
break;
#endif
default:
; /* fallthrough */
}
}
#endif /* FEATURE_EXT_texture_sRGB */
if (ctx->Extensions.EXT_texture_integer) {
switch (internalFormat) {
case GL_RGBA32UI_EXT:
case GL_RGB32UI_EXT:
case GL_ALPHA32UI_EXT:
case GL_INTENSITY32UI_EXT:
case GL_LUMINANCE32UI_EXT:
case GL_LUMINANCE_ALPHA32UI_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
break;
case GL_RGBA16UI_EXT:
case GL_RGB16UI_EXT:
case GL_ALPHA16UI_EXT:
case GL_INTENSITY16UI_EXT:
case GL_LUMINANCE16UI_EXT:
case GL_LUMINANCE_ALPHA16UI_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
break;
case GL_RGBA8UI_EXT:
case GL_RGB8UI_EXT:
case GL_ALPHA8UI_EXT:
case GL_INTENSITY8UI_EXT:
case GL_LUMINANCE8UI_EXT:
case GL_LUMINANCE_ALPHA8UI_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
break;
case GL_RGBA32I_EXT:
case GL_RGB32I_EXT:
case GL_ALPHA32I_EXT:
case GL_INTENSITY32I_EXT:
case GL_LUMINANCE32I_EXT:
case GL_LUMINANCE_ALPHA32I_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
break;
case GL_RGBA16I_EXT:
case GL_RGB16I_EXT:
case GL_ALPHA16I_EXT:
case GL_INTENSITY16I_EXT:
case GL_LUMINANCE16I_EXT:
case GL_LUMINANCE_ALPHA16I_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
break;
case GL_RGBA8I_EXT:
case GL_RGB8I_EXT:
case GL_ALPHA8I_EXT:
case GL_INTENSITY8I_EXT:
case GL_LUMINANCE8I_EXT:
case GL_LUMINANCE_ALPHA8I_EXT:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
break;
}
}
if (ctx->Extensions.ARB_texture_rg) {
switch (internalFormat) {
case GL_R8:
case GL_RED:
case GL_COMPRESSED_RED:
RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
break;
case GL_R16:
RETURN_IF_SUPPORTED(MESA_FORMAT_R16);
break;
case GL_RG:
case GL_RG8:
case GL_COMPRESSED_RG:
RETURN_IF_SUPPORTED(MESA_FORMAT_RG88);
break;
case GL_RG16:
RETURN_IF_SUPPORTED(MESA_FORMAT_RG1616);
break;
default:
; /* fallthrough */
}
}
_mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
return MESA_FORMAT_NONE;
}
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