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Diffstat (limited to 'src/mesa/main/texformat.c')
| -rw-r--r-- | src/mesa/main/texformat.c | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c new file mode 100644 index 0000000000..d235485721 --- /dev/null +++ b/src/mesa/main/texformat.c @@ -0,0 +1,388 @@ +/* + * 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 "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) { + /* shallow RGBA formats */ + case 4: + case GL_RGBA: + 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; + + /* deep RGBA formats */ + case GL_RGB10_A2: + case GL_RGBA12: + case GL_RGBA16: + return MESA_FORMAT_RGBA_16; + + /* shallow RGB formats */ + case 3: + case GL_RGB: + 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; + + /* deep RGB formats */ + case GL_RGB10: + case GL_RGB12: + case GL_RGB16: + return MESA_FORMAT_RGBA_16; + + /* 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 (ctx->VersionMajor * 10 + ctx->VersionMinor >= 31) { + switch (internalFormat) { + case GL_RED_SNORM: + case GL_R8_SNORM: + return MESA_FORMAT_SIGNED_R8; + case GL_RG_SNORM: + case GL_RG8_SNORM: + return MESA_FORMAT_SIGNED_RG88; + case GL_RGB_SNORM: + case GL_RGB8_SNORM: + return MESA_FORMAT_SIGNED_RGBX8888; + case GL_RGBA_SNORM: + case GL_RGBA8_SNORM: + return MESA_FORMAT_SIGNED_RGBA8888; + case GL_R16_SNORM: + return MESA_FORMAT_SIGNED_R_16; + case GL_RG16_SNORM: + return MESA_FORMAT_SIGNED_RG_16; + case GL_RGB16_SNORM: + return MESA_FORMAT_SIGNED_RGB_16; + case GL_RGBA16_SNORM: + return MESA_FORMAT_SIGNED_RGBA_16; + 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 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; +} + |