544 lines
15 KiB
C
544 lines
15 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 7.7
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*
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* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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* Copyright (c) 2008-2009 VMware, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file texformat.c
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* Texture formats.
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*
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* \author Gareth Hughes
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* \author Brian Paul
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*/
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#include "context.h"
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#include "texcompress.h"
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#include "texcompress_fxt1.h"
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#include "texcompress_s3tc.h"
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#include "texformat.h"
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/**
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* Choose an appropriate texture format given the format, type and
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* internalFormat parameters passed to glTexImage().
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*
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* \param ctx the GL context.
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* \param internalFormat user's prefered internal texture format.
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* \param format incoming image pixel format.
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* \param type incoming image data type.
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*
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* \return a pointer to a gl_texture_format object which describes the
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* choosen texture format, or NULL on failure.
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*
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* This is called via dd_function_table::ChooseTextureFormat. Hardware drivers
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* will typically override this function with a specialized version.
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*/
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gl_format
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_mesa_choose_tex_format( GLcontext *ctx, GLint internalFormat,
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GLenum format, GLenum type )
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{
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(void) format;
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(void) type;
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switch (internalFormat) {
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/* RGBA formats */
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case 4:
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case GL_RGBA:
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case GL_RGB10_A2:
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case GL_RGBA12:
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case GL_RGBA16:
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case GL_RGBA8:
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return MESA_FORMAT_RGBA8888;
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case GL_RGB5_A1:
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return MESA_FORMAT_ARGB1555;
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case GL_RGBA2:
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return MESA_FORMAT_ARGB4444_REV; /* just to test another format*/
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case GL_RGBA4:
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return MESA_FORMAT_ARGB4444;
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/* RGB formats */
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case 3:
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case GL_RGB:
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case GL_RGB10:
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case GL_RGB12:
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case GL_RGB16:
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case GL_RGB8:
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return MESA_FORMAT_RGB888;
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case GL_R3_G3_B2:
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return MESA_FORMAT_RGB332;
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case GL_RGB4:
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return MESA_FORMAT_RGB565_REV; /* just to test another format */
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case GL_RGB5:
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return MESA_FORMAT_RGB565;
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/* Alpha formats */
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case GL_ALPHA:
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case GL_ALPHA4:
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case GL_ALPHA12:
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case GL_ALPHA16:
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case GL_ALPHA8:
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return MESA_FORMAT_A8;
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/* Luminance formats */
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case 1:
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case GL_LUMINANCE:
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case GL_LUMINANCE4:
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case GL_LUMINANCE12:
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case GL_LUMINANCE16:
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case GL_LUMINANCE8:
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return MESA_FORMAT_L8;
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/* Luminance/Alpha formats */
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case 2:
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case GL_LUMINANCE_ALPHA:
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case GL_LUMINANCE4_ALPHA4:
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case GL_LUMINANCE6_ALPHA2:
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case GL_LUMINANCE12_ALPHA4:
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case GL_LUMINANCE12_ALPHA12:
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case GL_LUMINANCE16_ALPHA16:
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case GL_LUMINANCE8_ALPHA8:
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return MESA_FORMAT_AL88;
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case GL_INTENSITY:
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case GL_INTENSITY4:
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case GL_INTENSITY12:
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case GL_INTENSITY16:
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case GL_INTENSITY8:
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return MESA_FORMAT_I8;
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case GL_COLOR_INDEX:
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case GL_COLOR_INDEX1_EXT:
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case GL_COLOR_INDEX2_EXT:
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case GL_COLOR_INDEX4_EXT:
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case GL_COLOR_INDEX12_EXT:
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case GL_COLOR_INDEX16_EXT:
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case GL_COLOR_INDEX8_EXT:
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return MESA_FORMAT_CI8;
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default:
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; /* fallthrough */
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}
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if (ctx->Extensions.ARB_depth_texture) {
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switch (internalFormat) {
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case GL_DEPTH_COMPONENT:
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case GL_DEPTH_COMPONENT24:
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case GL_DEPTH_COMPONENT32:
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return MESA_FORMAT_Z32;
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case GL_DEPTH_COMPONENT16:
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return MESA_FORMAT_Z16;
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default:
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; /* fallthrough */
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}
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}
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switch (internalFormat) {
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case GL_COMPRESSED_ALPHA_ARB:
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return MESA_FORMAT_A8;
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case GL_COMPRESSED_LUMINANCE_ARB:
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return MESA_FORMAT_L8;
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case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
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return MESA_FORMAT_AL88;
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case GL_COMPRESSED_INTENSITY_ARB:
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return MESA_FORMAT_I8;
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case GL_COMPRESSED_RGB_ARB:
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#if FEATURE_texture_fxt1
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if (ctx->Extensions.TDFX_texture_compression_FXT1)
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return MESA_FORMAT_RGB_FXT1;
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#endif
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#if FEATURE_texture_s3tc
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if (ctx->Extensions.EXT_texture_compression_s3tc ||
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ctx->Extensions.S3_s3tc)
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return MESA_FORMAT_RGB_DXT1;
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#endif
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return MESA_FORMAT_RGB888;
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case GL_COMPRESSED_RGBA_ARB:
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#if FEATURE_texture_fxt1
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if (ctx->Extensions.TDFX_texture_compression_FXT1)
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return MESA_FORMAT_RGBA_FXT1;
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#endif
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#if FEATURE_texture_s3tc
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if (ctx->Extensions.EXT_texture_compression_s3tc ||
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ctx->Extensions.S3_s3tc)
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return MESA_FORMAT_RGBA_DXT3; /* Not rgba_dxt1, see spec */
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#endif
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return MESA_FORMAT_RGBA8888;
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default:
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; /* fallthrough */
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}
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if (ctx->Extensions.MESA_ycbcr_texture) {
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if (internalFormat == GL_YCBCR_MESA) {
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if (type == GL_UNSIGNED_SHORT_8_8_MESA)
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return MESA_FORMAT_YCBCR;
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else
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return MESA_FORMAT_YCBCR_REV;
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}
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}
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#if FEATURE_texture_fxt1
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if (ctx->Extensions.TDFX_texture_compression_FXT1) {
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switch (internalFormat) {
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case GL_COMPRESSED_RGB_FXT1_3DFX:
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return MESA_FORMAT_RGB_FXT1;
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case GL_COMPRESSED_RGBA_FXT1_3DFX:
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return MESA_FORMAT_RGBA_FXT1;
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default:
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; /* fallthrough */
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}
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}
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#endif
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#if FEATURE_texture_s3tc
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if (ctx->Extensions.EXT_texture_compression_s3tc) {
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switch (internalFormat) {
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case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
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return MESA_FORMAT_RGB_DXT1;
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case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
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return MESA_FORMAT_RGBA_DXT1;
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case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
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return MESA_FORMAT_RGBA_DXT3;
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case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
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return MESA_FORMAT_RGBA_DXT5;
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default:
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; /* fallthrough */
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}
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}
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if (ctx->Extensions.S3_s3tc) {
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switch (internalFormat) {
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case GL_RGB_S3TC:
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case GL_RGB4_S3TC:
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return MESA_FORMAT_RGB_DXT1;
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case GL_RGBA_S3TC:
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case GL_RGBA4_S3TC:
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return MESA_FORMAT_RGBA_DXT3;
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default:
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; /* fallthrough */
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}
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}
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#endif
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if (ctx->Extensions.ARB_texture_float) {
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switch (internalFormat) {
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case GL_ALPHA16F_ARB:
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return MESA_FORMAT_ALPHA_FLOAT16;
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case GL_ALPHA32F_ARB:
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return MESA_FORMAT_ALPHA_FLOAT32;
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case GL_LUMINANCE16F_ARB:
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return MESA_FORMAT_LUMINANCE_FLOAT16;
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case GL_LUMINANCE32F_ARB:
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return MESA_FORMAT_LUMINANCE_FLOAT32;
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case GL_LUMINANCE_ALPHA16F_ARB:
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return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;
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case GL_LUMINANCE_ALPHA32F_ARB:
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return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;
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case GL_INTENSITY16F_ARB:
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return MESA_FORMAT_INTENSITY_FLOAT16;
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case GL_INTENSITY32F_ARB:
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return MESA_FORMAT_INTENSITY_FLOAT32;
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case GL_RGB16F_ARB:
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return MESA_FORMAT_RGB_FLOAT16;
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case GL_RGB32F_ARB:
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return MESA_FORMAT_RGB_FLOAT32;
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case GL_RGBA16F_ARB:
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return MESA_FORMAT_RGBA_FLOAT16;
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case GL_RGBA32F_ARB:
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return MESA_FORMAT_RGBA_FLOAT32;
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default:
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; /* fallthrough */
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}
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}
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if (ctx->Extensions.EXT_packed_depth_stencil) {
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switch (internalFormat) {
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case GL_DEPTH_STENCIL_EXT:
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case GL_DEPTH24_STENCIL8_EXT:
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return MESA_FORMAT_Z24_S8;
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default:
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; /* fallthrough */
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}
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}
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if (ctx->Extensions.ATI_envmap_bumpmap) {
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switch (internalFormat) {
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case GL_DUDV_ATI:
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case GL_DU8DV8_ATI:
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return MESA_FORMAT_DUDV8;
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default:
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; /* fallthrough */
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}
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}
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if (ctx->Extensions.MESA_texture_signed_rgba) {
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switch (internalFormat) {
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case GL_RGBA_SNORM:
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case GL_RGBA8_SNORM:
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return MESA_FORMAT_SIGNED_RGBA8888;
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default:
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; /* fallthrough */
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}
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}
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#if FEATURE_EXT_texture_sRGB
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if (ctx->Extensions.EXT_texture_sRGB) {
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switch (internalFormat) {
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case GL_SRGB_EXT:
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case GL_SRGB8_EXT:
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return MESA_FORMAT_SRGB8;
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case GL_SRGB_ALPHA_EXT:
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case GL_SRGB8_ALPHA8_EXT:
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return MESA_FORMAT_SRGBA8;
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case GL_SLUMINANCE_EXT:
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case GL_SLUMINANCE8_EXT:
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return MESA_FORMAT_SL8;
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case GL_SLUMINANCE_ALPHA_EXT:
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case GL_SLUMINANCE8_ALPHA8_EXT:
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return MESA_FORMAT_SLA8;
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case GL_COMPRESSED_SLUMINANCE_EXT:
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return MESA_FORMAT_SL8;
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case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
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return MESA_FORMAT_SLA8;
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case GL_COMPRESSED_SRGB_EXT:
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#if FEATURE_texture_s3tc
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if (ctx->Extensions.EXT_texture_compression_s3tc)
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return MESA_FORMAT_SRGB_DXT1;
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#endif
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return MESA_FORMAT_SRGB8;
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case GL_COMPRESSED_SRGB_ALPHA_EXT:
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#if FEATURE_texture_s3tc
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if (ctx->Extensions.EXT_texture_compression_s3tc)
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return MESA_FORMAT_SRGBA_DXT3; /* Not srgba_dxt1, see spec */
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#endif
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return MESA_FORMAT_SRGBA8;
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#if FEATURE_texture_s3tc
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case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
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if (ctx->Extensions.EXT_texture_compression_s3tc)
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return MESA_FORMAT_SRGB_DXT1;
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break;
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case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
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if (ctx->Extensions.EXT_texture_compression_s3tc)
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return MESA_FORMAT_SRGBA_DXT1;
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break;
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case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
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if (ctx->Extensions.EXT_texture_compression_s3tc)
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return MESA_FORMAT_SRGBA_DXT3;
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break;
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case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
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if (ctx->Extensions.EXT_texture_compression_s3tc)
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return MESA_FORMAT_SRGBA_DXT5;
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break;
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#endif
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default:
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; /* fallthrough */
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}
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}
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#endif /* FEATURE_EXT_texture_sRGB */
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_mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
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return MESA_FORMAT_NONE;
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}
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/**
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* Return datatype and number of components per texel for the given gl_format.
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*/
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void
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_mesa_format_to_type_and_comps(gl_format format,
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GLenum *datatype, GLuint *comps)
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{
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switch (format) {
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case MESA_FORMAT_RGBA8888:
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case MESA_FORMAT_RGBA8888_REV:
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case MESA_FORMAT_ARGB8888:
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case MESA_FORMAT_ARGB8888_REV:
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*datatype = CHAN_TYPE;
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*comps = 4;
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return;
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case MESA_FORMAT_RGB888:
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case MESA_FORMAT_BGR888:
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*datatype = GL_UNSIGNED_BYTE;
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*comps = 3;
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return;
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case MESA_FORMAT_RGB565:
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case MESA_FORMAT_RGB565_REV:
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*datatype = GL_UNSIGNED_SHORT_5_6_5;
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*comps = 3;
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return;
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case MESA_FORMAT_ARGB4444:
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case MESA_FORMAT_ARGB4444_REV:
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*datatype = GL_UNSIGNED_SHORT_4_4_4_4;
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*comps = 4;
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return;
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case MESA_FORMAT_ARGB1555:
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case MESA_FORMAT_ARGB1555_REV:
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*datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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*comps = 4;
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return;
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case MESA_FORMAT_AL88:
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case MESA_FORMAT_AL88_REV:
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*datatype = GL_UNSIGNED_BYTE;
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*comps = 2;
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return;
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case MESA_FORMAT_RGB332:
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*datatype = GL_UNSIGNED_BYTE_3_3_2;
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*comps = 3;
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return;
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case MESA_FORMAT_A8:
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case MESA_FORMAT_L8:
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case MESA_FORMAT_I8:
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case MESA_FORMAT_CI8:
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*datatype = GL_UNSIGNED_BYTE;
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*comps = 1;
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return;
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case MESA_FORMAT_YCBCR:
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case MESA_FORMAT_YCBCR_REV:
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*datatype = GL_UNSIGNED_SHORT;
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*comps = 2;
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return;
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case MESA_FORMAT_Z24_S8:
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*datatype = GL_UNSIGNED_INT;
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*comps = 1; /* XXX OK? */
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return;
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case MESA_FORMAT_S8_Z24:
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*datatype = GL_UNSIGNED_INT;
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*comps = 1; /* XXX OK? */
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return;
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case MESA_FORMAT_Z16:
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*datatype = GL_UNSIGNED_SHORT;
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*comps = 1;
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return;
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case MESA_FORMAT_Z32:
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*datatype = GL_UNSIGNED_INT;
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*comps = 1;
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return;
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case MESA_FORMAT_DUDV8:
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*datatype = GL_BYTE;
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*comps = 2;
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return;
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case MESA_FORMAT_SIGNED_RGBA8888:
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case MESA_FORMAT_SIGNED_RGBA8888_REV:
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*datatype = GL_BYTE;
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*comps = 4;
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return;
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#if FEATURE_EXT_texture_sRGB
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case MESA_FORMAT_SRGB8:
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*datatype = GL_UNSIGNED_BYTE;
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*comps = 3;
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return;
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case MESA_FORMAT_SRGBA8:
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case MESA_FORMAT_SARGB8:
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*datatype = GL_UNSIGNED_BYTE;
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*comps = 4;
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return;
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case MESA_FORMAT_SL8:
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*datatype = GL_UNSIGNED_BYTE;
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*comps = 1;
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return;
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case MESA_FORMAT_SLA8:
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*datatype = GL_UNSIGNED_BYTE;
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*comps = 2;
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return;
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#endif
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#if FEATURE_texture_fxt1
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case MESA_FORMAT_RGB_FXT1:
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case MESA_FORMAT_RGBA_FXT1:
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#endif
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#if FEATURE_texture_s3tc
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case MESA_FORMAT_RGB_DXT1:
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case MESA_FORMAT_RGBA_DXT1:
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case MESA_FORMAT_RGBA_DXT3:
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case MESA_FORMAT_RGBA_DXT5:
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#if FEATURE_EXT_texture_sRGB
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case MESA_FORMAT_SRGB_DXT1:
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case MESA_FORMAT_SRGBA_DXT1:
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case MESA_FORMAT_SRGBA_DXT3:
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case MESA_FORMAT_SRGBA_DXT5:
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#endif
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/* XXX generate error instead? */
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*datatype = GL_UNSIGNED_BYTE;
|
|
*comps = 0;
|
|
return;
|
|
#endif
|
|
|
|
case MESA_FORMAT_RGBA_FLOAT32:
|
|
*datatype = GL_FLOAT;
|
|
*comps = 4;
|
|
return;
|
|
case MESA_FORMAT_RGBA_FLOAT16:
|
|
*datatype = GL_HALF_FLOAT_ARB;
|
|
*comps = 4;
|
|
return;
|
|
case MESA_FORMAT_RGB_FLOAT32:
|
|
*datatype = GL_FLOAT;
|
|
*comps = 3;
|
|
return;
|
|
case MESA_FORMAT_RGB_FLOAT16:
|
|
*datatype = GL_HALF_FLOAT_ARB;
|
|
*comps = 3;
|
|
return;
|
|
case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
|
|
*datatype = GL_FLOAT;
|
|
*comps = 2;
|
|
return;
|
|
case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
|
|
*datatype = GL_HALF_FLOAT_ARB;
|
|
*comps = 2;
|
|
return;
|
|
case MESA_FORMAT_ALPHA_FLOAT32:
|
|
case MESA_FORMAT_LUMINANCE_FLOAT32:
|
|
case MESA_FORMAT_INTENSITY_FLOAT32:
|
|
*datatype = GL_FLOAT;
|
|
*comps = 1;
|
|
return;
|
|
case MESA_FORMAT_ALPHA_FLOAT16:
|
|
case MESA_FORMAT_LUMINANCE_FLOAT16:
|
|
case MESA_FORMAT_INTENSITY_FLOAT16:
|
|
*datatype = GL_HALF_FLOAT_ARB;
|
|
*comps = 1;
|
|
return;
|
|
|
|
default:
|
|
_mesa_problem(NULL, "bad format in _mesa_format_to_type_and_comps");
|
|
*datatype = 0;
|
|
*comps = 1;
|
|
}
|
|
}
|