| /* |
| * 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 "texcompress.h" |
| #include "texcompress_fxt1.h" |
| #include "texcompress_s3tc.h" |
| #include "texformat.h" |
| |
| |
| /** |
| * 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( GLcontext *ctx, GLint internalFormat, |
| GLenum format, GLenum type ) |
| { |
| (void) format; |
| (void) type; |
| |
| switch (internalFormat) { |
| /* RGBA formats */ |
| case 4: |
| case GL_RGBA: |
| case GL_RGB10_A2: |
| case GL_RGBA12: |
| case GL_RGBA16: |
| case GL_RGBA8: |
| return MESA_FORMAT_RGBA8888; |
| case GL_RGB5_A1: |
| return MESA_FORMAT_ARGB1555; |
| case GL_RGBA2: |
| return MESA_FORMAT_ARGB4444_REV; /* just to test another format*/ |
| case GL_RGBA4: |
| return MESA_FORMAT_ARGB4444; |
| |
| /* RGB formats */ |
| case 3: |
| case GL_RGB: |
| case GL_RGB10: |
| case GL_RGB12: |
| case GL_RGB16: |
| case GL_RGB8: |
| return MESA_FORMAT_RGB888; |
| case GL_R3_G3_B2: |
| return MESA_FORMAT_RGB332; |
| case GL_RGB4: |
| return MESA_FORMAT_RGB565_REV; /* just to test another format */ |
| case GL_RGB5: |
| return MESA_FORMAT_RGB565; |
| |
| /* Alpha formats */ |
| case GL_ALPHA: |
| case GL_ALPHA4: |
| case GL_ALPHA12: |
| case GL_ALPHA16: |
| case GL_ALPHA8: |
| return MESA_FORMAT_A8; |
| |
| /* Luminance formats */ |
| case 1: |
| case GL_LUMINANCE: |
| case GL_LUMINANCE4: |
| case GL_LUMINANCE12: |
| case GL_LUMINANCE16: |
| case GL_LUMINANCE8: |
| return MESA_FORMAT_L8; |
| |
| /* Luminance/Alpha formats */ |
| case 2: |
| case GL_LUMINANCE_ALPHA: |
| case GL_LUMINANCE4_ALPHA4: |
| case GL_LUMINANCE6_ALPHA2: |
| case GL_LUMINANCE8_ALPHA8: |
| return MESA_FORMAT_AL88; |
| |
| case GL_LUMINANCE12_ALPHA4: |
| case GL_LUMINANCE12_ALPHA12: |
| case GL_LUMINANCE16_ALPHA16: |
| return MESA_FORMAT_AL1616; |
| |
| case GL_INTENSITY: |
| case GL_INTENSITY4: |
| case GL_INTENSITY12: |
| case GL_INTENSITY16: |
| case GL_INTENSITY8: |
| return MESA_FORMAT_I8; |
| |
| 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 MESA_FORMAT_CI8; |
| |
| default: |
| ; /* fallthrough */ |
| } |
| |
| if (ctx->Extensions.ARB_depth_texture) { |
| switch (internalFormat) { |
| case GL_DEPTH_COMPONENT: |
| case GL_DEPTH_COMPONENT24: |
| case GL_DEPTH_COMPONENT32: |
| return MESA_FORMAT_Z32; |
| case GL_DEPTH_COMPONENT16: |
| return MESA_FORMAT_Z16; |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| |
| switch (internalFormat) { |
| case GL_COMPRESSED_ALPHA_ARB: |
| return MESA_FORMAT_A8; |
| case GL_COMPRESSED_LUMINANCE_ARB: |
| return MESA_FORMAT_L8; |
| case GL_COMPRESSED_LUMINANCE_ALPHA_ARB: |
| return MESA_FORMAT_AL88; |
| case GL_COMPRESSED_INTENSITY_ARB: |
| return MESA_FORMAT_I8; |
| case GL_COMPRESSED_RGB_ARB: |
| if (ctx->Extensions.EXT_texture_compression_s3tc || |
| ctx->Extensions.S3_s3tc) |
| return MESA_FORMAT_RGB_DXT1; |
| if (ctx->Extensions.TDFX_texture_compression_FXT1) |
| return MESA_FORMAT_RGB_FXT1; |
| return MESA_FORMAT_RGB888; |
| case GL_COMPRESSED_RGBA_ARB: |
| if (ctx->Extensions.EXT_texture_compression_s3tc || |
| ctx->Extensions.S3_s3tc) |
| return MESA_FORMAT_RGBA_DXT3; /* Not rgba_dxt1, see spec */ |
| if (ctx->Extensions.TDFX_texture_compression_FXT1) |
| return MESA_FORMAT_RGBA_FXT1; |
| return MESA_FORMAT_RGBA8888; |
| default: |
| ; /* fallthrough */ |
| } |
| |
| if (ctx->Extensions.MESA_ycbcr_texture) { |
| if (internalFormat == GL_YCBCR_MESA) { |
| if (type == GL_UNSIGNED_SHORT_8_8_MESA) |
| return MESA_FORMAT_YCBCR; |
| else |
| return MESA_FORMAT_YCBCR_REV; |
| } |
| } |
| |
| #if FEATURE_texture_fxt1 |
| if (ctx->Extensions.TDFX_texture_compression_FXT1) { |
| switch (internalFormat) { |
| case GL_COMPRESSED_RGB_FXT1_3DFX: |
| return MESA_FORMAT_RGB_FXT1; |
| case GL_COMPRESSED_RGBA_FXT1_3DFX: |
| return MESA_FORMAT_RGBA_FXT1; |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| #endif |
| |
| #if FEATURE_texture_s3tc |
| if (ctx->Extensions.EXT_texture_compression_s3tc) { |
| switch (internalFormat) { |
| case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: |
| return MESA_FORMAT_RGB_DXT1; |
| case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: |
| return MESA_FORMAT_RGBA_DXT1; |
| case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT: |
| return MESA_FORMAT_RGBA_DXT3; |
| case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT: |
| return MESA_FORMAT_RGBA_DXT5; |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| |
| if (ctx->Extensions.S3_s3tc) { |
| switch (internalFormat) { |
| case GL_RGB_S3TC: |
| case GL_RGB4_S3TC: |
| return MESA_FORMAT_RGB_DXT1; |
| case GL_RGBA_S3TC: |
| case GL_RGBA4_S3TC: |
| return MESA_FORMAT_RGBA_DXT3; |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| #endif |
| |
| if (ctx->Extensions.ARB_texture_float) { |
| switch (internalFormat) { |
| case GL_ALPHA16F_ARB: |
| return MESA_FORMAT_ALPHA_FLOAT16; |
| case GL_ALPHA32F_ARB: |
| return MESA_FORMAT_ALPHA_FLOAT32; |
| case GL_LUMINANCE16F_ARB: |
| return MESA_FORMAT_LUMINANCE_FLOAT16; |
| case GL_LUMINANCE32F_ARB: |
| return MESA_FORMAT_LUMINANCE_FLOAT32; |
| case GL_LUMINANCE_ALPHA16F_ARB: |
| return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16; |
| case GL_LUMINANCE_ALPHA32F_ARB: |
| return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32; |
| case GL_INTENSITY16F_ARB: |
| return MESA_FORMAT_INTENSITY_FLOAT16; |
| case GL_INTENSITY32F_ARB: |
| return MESA_FORMAT_INTENSITY_FLOAT32; |
| case GL_RGB16F_ARB: |
| return MESA_FORMAT_RGB_FLOAT16; |
| case GL_RGB32F_ARB: |
| return MESA_FORMAT_RGB_FLOAT32; |
| case GL_RGBA16F_ARB: |
| return MESA_FORMAT_RGBA_FLOAT16; |
| case GL_RGBA32F_ARB: |
| return MESA_FORMAT_RGBA_FLOAT32; |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| |
| if (ctx->Extensions.EXT_packed_depth_stencil) { |
| switch (internalFormat) { |
| case GL_DEPTH_STENCIL_EXT: |
| case GL_DEPTH24_STENCIL8_EXT: |
| return MESA_FORMAT_Z24_S8; |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| |
| if (ctx->Extensions.ATI_envmap_bumpmap) { |
| switch (internalFormat) { |
| case GL_DUDV_ATI: |
| case GL_DU8DV8_ATI: |
| return MESA_FORMAT_DUDV8; |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| |
| if (ctx->Extensions.MESA_texture_signed_rgba) { |
| switch (internalFormat) { |
| case GL_RGBA_SNORM: |
| case GL_RGBA8_SNORM: |
| return MESA_FORMAT_SIGNED_RGBA8888; |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| |
| |
| #if FEATURE_EXT_texture_sRGB |
| if (ctx->Extensions.EXT_texture_sRGB) { |
| switch (internalFormat) { |
| case GL_SRGB_EXT: |
| case GL_SRGB8_EXT: |
| return MESA_FORMAT_SRGB8; |
| case GL_SRGB_ALPHA_EXT: |
| case GL_SRGB8_ALPHA8_EXT: |
| return MESA_FORMAT_SRGBA8; |
| case GL_SLUMINANCE_EXT: |
| case GL_SLUMINANCE8_EXT: |
| return MESA_FORMAT_SL8; |
| case GL_SLUMINANCE_ALPHA_EXT: |
| case GL_SLUMINANCE8_ALPHA8_EXT: |
| return MESA_FORMAT_SLA8; |
| case GL_COMPRESSED_SLUMINANCE_EXT: |
| return MESA_FORMAT_SL8; |
| case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT: |
| return MESA_FORMAT_SLA8; |
| case GL_COMPRESSED_SRGB_EXT: |
| #if FEATURE_texture_s3tc |
| if (ctx->Extensions.EXT_texture_compression_s3tc) |
| return MESA_FORMAT_SRGB_DXT1; |
| #endif |
| return MESA_FORMAT_SRGB8; |
| case GL_COMPRESSED_SRGB_ALPHA_EXT: |
| #if FEATURE_texture_s3tc |
| if (ctx->Extensions.EXT_texture_compression_s3tc) |
| return MESA_FORMAT_SRGBA_DXT3; /* Not srgba_dxt1, see spec */ |
| #endif |
| return MESA_FORMAT_SRGBA8; |
| #if FEATURE_texture_s3tc |
| case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT: |
| if (ctx->Extensions.EXT_texture_compression_s3tc) |
| return MESA_FORMAT_SRGB_DXT1; |
| break; |
| case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT: |
| if (ctx->Extensions.EXT_texture_compression_s3tc) |
| return MESA_FORMAT_SRGBA_DXT1; |
| break; |
| case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT: |
| if (ctx->Extensions.EXT_texture_compression_s3tc) |
| return MESA_FORMAT_SRGBA_DXT3; |
| break; |
| case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT: |
| if (ctx->Extensions.EXT_texture_compression_s3tc) |
| return MESA_FORMAT_SRGBA_DXT5; |
| break; |
| #endif |
| default: |
| ; /* fallthrough */ |
| } |
| } |
| #endif /* FEATURE_EXT_texture_sRGB */ |
| |
| _mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()"); |
| return MESA_FORMAT_NONE; |
| } |
| |