/* * Mesa 3-D graphics library * * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. * Copyright (c) 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 * THE AUTHORS OR COPYRIGHT HOLDERS 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 s_texfetch.c * * Texel fetch/store functions * * \author Gareth Hughes */ #include "main/errors.h" #include "main/macros.h" #include "main/texcompress.h" #include "main/texcompress_fxt1.h" #include "main/texcompress_s3tc.h" #include "main/texcompress_rgtc.h" #include "main/texcompress_etc.h" #include "main/teximage.h" #include "main/samplerobj.h" #include "s_context.h" #include "s_texfetch.h" #include "util/format_rgb9e5.h" #include "util/format_r11g11b10f.h" #include "util/format_srgb.h" /* Texel fetch routines for all supported formats */ #define DIM 1 #include "s_texfetch_tmp.h" #define DIM 2 #include "s_texfetch_tmp.h" #define DIM 3 #include "s_texfetch_tmp.h" /** * All compressed texture texel fetching is done though this function. * Basically just call a core-Mesa texel fetch function. */ static void fetch_compressed(const struct swrast_texture_image *swImage, GLint i, GLint j, GLint k, GLfloat *texel) { /* The FetchCompressedTexel function takes an integer pixel rowstride, * while the image's rowstride is bytes per row of blocks. */ GLuint bw, bh; GLuint texelBytes = _mesa_get_format_bytes(swImage->Base.TexFormat); _mesa_get_format_block_size(swImage->Base.TexFormat, &bw, &bh); assert(swImage->RowStride * bw % texelBytes == 0); swImage->FetchCompressedTexel(swImage->ImageSlices[k], swImage->RowStride * bw / texelBytes, i, j, texel); } /** * Null texel fetch function. * * Have to have this so the FetchTexel function pointer is never NULL. */ static void fetch_null_texelf( const struct swrast_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel ) { (void) texImage; (void) i; (void) j; (void) k; texel[RCOMP] = 0.0; texel[GCOMP] = 0.0; texel[BCOMP] = 0.0; texel[ACOMP] = 0.0; _mesa_warning(NULL, "fetch_null_texelf() called!"); } #define FETCH_FUNCS(NAME) \ [MESA_FORMAT_ ## NAME] = { \ fetch_texel_1d_ ## NAME, \ fetch_texel_2d_ ## NAME, \ fetch_texel_3d_ ## NAME, \ } #define FETCH_COMPRESSED(NAME) \ [MESA_FORMAT_ ## NAME] = { \ fetch_compressed, \ fetch_compressed, \ fetch_compressed \ } /** * Table to map MESA_FORMAT_ to texel fetch/store funcs. */ static struct { FetchTexelFunc Fetch1D; FetchTexelFunc Fetch2D; FetchTexelFunc Fetch3D; } texfetch_funcs[] = { /* Packed unorm formats */ FETCH_FUNCS(A8B8G8R8_UNORM), FETCH_FUNCS(X8B8G8R8_UNORM), FETCH_FUNCS(R8G8B8A8_UNORM), FETCH_FUNCS(R8G8B8X8_UNORM), FETCH_FUNCS(B8G8R8A8_UNORM), FETCH_FUNCS(B8G8R8X8_UNORM), FETCH_FUNCS(A8R8G8B8_UNORM), FETCH_FUNCS(X8R8G8B8_UNORM), FETCH_FUNCS(B5G6R5_UNORM), FETCH_FUNCS(R5G6B5_UNORM), FETCH_FUNCS(B4G4R4A4_UNORM), FETCH_FUNCS(A4R4G4B4_UNORM), FETCH_FUNCS(A1B5G5R5_UNORM), FETCH_FUNCS(B5G5R5A1_UNORM), FETCH_FUNCS(A1R5G5B5_UNORM), FETCH_FUNCS(L4A4_UNORM), FETCH_FUNCS(B2G3R3_UNORM), FETCH_FUNCS(B10G10R10A2_UNORM), FETCH_FUNCS(R10G10B10A2_UNORM), FETCH_FUNCS(S8_UINT_Z24_UNORM), [MESA_FORMAT_X8_UINT_Z24_UNORM] = { fetch_texel_1d_S8_UINT_Z24_UNORM, fetch_texel_2d_S8_UINT_Z24_UNORM, fetch_texel_3d_S8_UINT_Z24_UNORM }, FETCH_FUNCS(Z24_UNORM_S8_UINT), [MESA_FORMAT_Z24_UNORM_X8_UINT] = { fetch_texel_1d_Z24_UNORM_S8_UINT, fetch_texel_2d_Z24_UNORM_S8_UINT, fetch_texel_3d_Z24_UNORM_S8_UINT }, FETCH_FUNCS(YCBCR), FETCH_FUNCS(YCBCR_REV), /* Array unorm formats */ FETCH_FUNCS(A_UNORM8), FETCH_FUNCS(A_UNORM16), FETCH_FUNCS(L_UNORM8), FETCH_FUNCS(L_UNORM16), FETCH_FUNCS(LA_UNORM8), FETCH_FUNCS(LA_UNORM16), FETCH_FUNCS(I_UNORM8), FETCH_FUNCS(I_UNORM16), FETCH_FUNCS(R_UNORM8), FETCH_FUNCS(R_UNORM16), FETCH_FUNCS(RG_UNORM8), FETCH_FUNCS(RG_UNORM16), FETCH_FUNCS(BGR_UNORM8), FETCH_FUNCS(RGB_UNORM8), FETCH_FUNCS(RGBA_UNORM16), FETCH_FUNCS(RGBX_UNORM16), FETCH_FUNCS(Z_UNORM16), FETCH_FUNCS(Z_UNORM32), /* Packed signed/normalized formats */ FETCH_FUNCS(A8B8G8R8_SNORM), FETCH_FUNCS(X8B8G8R8_SNORM), FETCH_FUNCS(R8G8B8A8_SNORM), /* Array signed/normalized formats */ FETCH_FUNCS(A_SNORM8), FETCH_FUNCS(A_SNORM16), FETCH_FUNCS(L_SNORM8), FETCH_FUNCS(L_SNORM16), FETCH_FUNCS(LA_SNORM8), FETCH_FUNCS(LA_SNORM16), FETCH_FUNCS(I_SNORM8), FETCH_FUNCS(I_SNORM16), FETCH_FUNCS(R_SNORM8), FETCH_FUNCS(R_SNORM16), FETCH_FUNCS(RG_SNORM8), FETCH_FUNCS(RG_SNORM16), FETCH_FUNCS(RGB_SNORM16), FETCH_FUNCS(RGBA_SNORM16), /* Packed sRGB formats */ FETCH_FUNCS(A8B8G8R8_SRGB), FETCH_FUNCS(B8G8R8A8_SRGB), FETCH_FUNCS(A8R8G8B8_SRGB), FETCH_FUNCS(R8G8B8A8_SRGB), FETCH_FUNCS(R8G8B8X8_SRGB), FETCH_FUNCS(X8B8G8R8_SRGB), /* Array sRGB formats */ FETCH_FUNCS(R_SRGB8), FETCH_FUNCS(L_SRGB8), FETCH_FUNCS(LA_SRGB8), FETCH_FUNCS(BGR_SRGB8), /* Packed float formats */ FETCH_FUNCS(R9G9B9E5_FLOAT), FETCH_FUNCS(R11G11B10_FLOAT), FETCH_FUNCS(Z32_FLOAT_S8X24_UINT), /* Array float formats */ FETCH_FUNCS(A_FLOAT16), FETCH_FUNCS(A_FLOAT32), FETCH_FUNCS(L_FLOAT16), FETCH_FUNCS(L_FLOAT32), FETCH_FUNCS(LA_FLOAT16), FETCH_FUNCS(LA_FLOAT32), FETCH_FUNCS(I_FLOAT16), FETCH_FUNCS(I_FLOAT32), FETCH_FUNCS(R_FLOAT16), FETCH_FUNCS(R_FLOAT32), FETCH_FUNCS(RG_FLOAT16), FETCH_FUNCS(RG_FLOAT32), FETCH_FUNCS(RGB_FLOAT16), FETCH_FUNCS(RGB_FLOAT32), FETCH_FUNCS(RGBA_FLOAT16), FETCH_FUNCS(RGBA_FLOAT32), FETCH_FUNCS(RGBX_FLOAT16), FETCH_FUNCS(RGBX_FLOAT32), [MESA_FORMAT_Z_FLOAT32] = { fetch_texel_1d_R_FLOAT32, /* Reuse the R32F functions. */ fetch_texel_2d_R_FLOAT32, fetch_texel_3d_R_FLOAT32 }, /* Packed signed/unsigned non-normalized integer formats */ /* Array signed/unsigned non-normalized integer formats */ FETCH_FUNCS(RGBA_UINT16), FETCH_FUNCS(RGBA_UINT32), FETCH_FUNCS(RGBA_SINT8), FETCH_FUNCS(RGBA_SINT16), FETCH_FUNCS(RGBA_SINT32), /* DXT compressed formats */ FETCH_COMPRESSED(RGB_DXT1), FETCH_COMPRESSED(RGBA_DXT1), FETCH_COMPRESSED(RGBA_DXT3), FETCH_COMPRESSED(RGBA_DXT5), /* DXT sRGB compressed formats */ FETCH_COMPRESSED(SRGB_DXT1), FETCH_COMPRESSED(SRGBA_DXT1), FETCH_COMPRESSED(SRGBA_DXT3), FETCH_COMPRESSED(SRGBA_DXT5), /* FXT1 compressed formats */ FETCH_COMPRESSED(RGB_FXT1), FETCH_COMPRESSED(RGBA_FXT1), /* RGTC compressed formats */ FETCH_COMPRESSED(R_RGTC1_UNORM), FETCH_COMPRESSED(R_RGTC1_SNORM), FETCH_COMPRESSED(RG_RGTC2_UNORM), FETCH_COMPRESSED(RG_RGTC2_SNORM), /* LATC1/2 compressed formats */ FETCH_COMPRESSED(L_LATC1_UNORM), FETCH_COMPRESSED(L_LATC1_SNORM), FETCH_COMPRESSED(LA_LATC2_UNORM), FETCH_COMPRESSED(LA_LATC2_SNORM), /* ETC1/2 compressed formats */ FETCH_COMPRESSED(ETC1_RGB8), FETCH_COMPRESSED(ETC2_RGB8), FETCH_COMPRESSED(ETC2_SRGB8), FETCH_COMPRESSED(ETC2_RGBA8_EAC), FETCH_COMPRESSED(ETC2_SRGB8_ALPHA8_EAC), FETCH_COMPRESSED(ETC2_R11_EAC), FETCH_COMPRESSED(ETC2_RG11_EAC), FETCH_COMPRESSED(ETC2_SIGNED_R11_EAC), FETCH_COMPRESSED(ETC2_SIGNED_RG11_EAC), FETCH_COMPRESSED(ETC2_RGB8_PUNCHTHROUGH_ALPHA1), FETCH_COMPRESSED(ETC2_SRGB8_PUNCHTHROUGH_ALPHA1), FETCH_COMPRESSED(BPTC_RGBA_UNORM), FETCH_COMPRESSED(BPTC_SRGB_ALPHA_UNORM), FETCH_COMPRESSED(BPTC_RGB_SIGNED_FLOAT), FETCH_COMPRESSED(BPTC_RGB_UNSIGNED_FLOAT), }; /** * Initialize the texture image's FetchTexel methods. */ static void set_fetch_functions(const struct gl_sampler_object *samp, struct swrast_texture_image *texImage, GLuint dims) { mesa_format format = texImage->Base.TexFormat; if (samp->Attrib.sRGBDecode == GL_SKIP_DECODE_EXT) format = _mesa_get_srgb_format_linear(format); texImage->FetchTexel = NULL; if (format < ARRAY_SIZE(texfetch_funcs)) { switch (dims) { case 1: texImage->FetchTexel = texfetch_funcs[format].Fetch1D; break; case 2: texImage->FetchTexel = texfetch_funcs[format].Fetch2D; break; case 3: texImage->FetchTexel = texfetch_funcs[format].Fetch3D; break; default: assert(!"Bad dims in set_fetch_functions()"); } } if (!texImage->FetchTexel) texImage->FetchTexel = fetch_null_texelf; texImage->FetchCompressedTexel = _mesa_get_compressed_fetch_func(format); assert(texImage->FetchTexel); } void _mesa_update_fetch_functions(struct gl_context *ctx, GLuint unit) { struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; struct gl_sampler_object *samp; GLuint face, i; GLuint dims; if (!texObj) return; samp = _mesa_get_samplerobj(ctx, unit); dims = _mesa_get_texture_dimensions(texObj->Target); for (face = 0; face < 6; face++) { for (i = 0; i < MAX_TEXTURE_LEVELS; i++) { if (texObj->Image[face][i]) { set_fetch_functions(samp, swrast_texture_image(texObj->Image[face][i]), dims); } } } }