/* * 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/colormac.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 "../../gallium/auxiliary/util/u_format_rgb9e5.h" #include "../../gallium/auxiliary/util/u_format_r11g11b10f.h" /** * Convert an 8-bit sRGB value from non-linear space to a * linear RGB value in [0, 1]. * Implemented with a 256-entry lookup table. */ static inline GLfloat nonlinear_to_linear(GLubyte cs8) { static GLfloat table[256]; static GLboolean tableReady = GL_FALSE; if (!tableReady) { /* compute lookup table now */ GLuint i; for (i = 0; i < 256; i++) { const GLfloat cs = UBYTE_TO_FLOAT(i); if (cs <= 0.04045) { table[i] = cs / 12.92f; } else { table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4); } } tableReady = GL_TRUE; } return table[cs8]; } /* 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_NULL(NAME) \ { \ MESA_FORMAT_ ## NAME, \ NULL, \ NULL, \ NULL \ } /** * Table to map MESA_FORMAT_ to texel fetch/store funcs. */ static struct { mesa_format Name; FetchTexelFunc Fetch1D; FetchTexelFunc Fetch2D; FetchTexelFunc Fetch3D; } texfetch_funcs[] = { { MESA_FORMAT_NONE, fetch_null_texelf, fetch_null_texelf, fetch_null_texelf }, /* 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(L16A16_UNORM), FETCH_FUNCS(A16L16_UNORM), FETCH_FUNCS(B5G6R5_UNORM), FETCH_FUNCS(R5G6B5_UNORM), FETCH_FUNCS(B4G4R4A4_UNORM), FETCH_NULL(B4G4R4X4_UNORM), FETCH_FUNCS(A4R4G4B4_UNORM), FETCH_FUNCS(A1B5G5R5_UNORM), FETCH_FUNCS(B5G5R5A1_UNORM), FETCH_NULL(B5G5R5X1_UNORM), FETCH_FUNCS(A1R5G5B5_UNORM), FETCH_FUNCS(L8A8_UNORM), FETCH_FUNCS(A8L8_UNORM), FETCH_FUNCS(R8G8_UNORM), FETCH_FUNCS(G8R8_UNORM), FETCH_FUNCS(L4A4_UNORM), FETCH_FUNCS(B2G3R3_UNORM), FETCH_FUNCS(R16G16_UNORM), FETCH_FUNCS(G16R16_UNORM), FETCH_FUNCS(B10G10R10A2_UNORM), FETCH_NULL(B10G10R10X2_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), FETCH_FUNCS(DUDV8), /* Array unorm formats */ FETCH_FUNCS(A_UNORM8), FETCH_FUNCS(A_UNORM16), FETCH_FUNCS(L_UNORM8), FETCH_FUNCS(L_UNORM16), FETCH_FUNCS(I_UNORM8), FETCH_FUNCS(I_UNORM16), FETCH_FUNCS(R_UNORM8), FETCH_FUNCS(R_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), FETCH_NULL(S_UINT8), /* Packed signed/normalized formats */ FETCH_FUNCS(A8B8G8R8_SNORM), FETCH_FUNCS(X8B8G8R8_SNORM), FETCH_FUNCS(R8G8B8A8_SNORM), FETCH_NULL(R8G8B8X8_SNORM), FETCH_FUNCS(R16G16_SNORM), FETCH_NULL(G16R16_SNORM), FETCH_FUNCS(R8G8_SNORM), FETCH_NULL(G8R8_SNORM), FETCH_FUNCS(L8A8_SNORM), /* Array signed/normalized formats */ FETCH_FUNCS(A_SNORM8), FETCH_FUNCS(A_SNORM16), FETCH_FUNCS(L_SNORM8), FETCH_FUNCS(L_SNORM16), FETCH_FUNCS(I_SNORM8), FETCH_FUNCS(I_SNORM16), FETCH_FUNCS(R_SNORM8), FETCH_FUNCS(R_SNORM16), FETCH_FUNCS(LA_SNORM16), FETCH_FUNCS(RGB_SNORM16), FETCH_FUNCS(RGBA_SNORM16), FETCH_NULL(RGBX_SNORM16), /* Packed sRGB formats */ FETCH_FUNCS(A8B8G8R8_SRGB), FETCH_FUNCS(B8G8R8A8_SRGB), FETCH_NULL(B8G8R8X8_SRGB), FETCH_FUNCS(R8G8B8A8_SRGB), FETCH_FUNCS(R8G8B8X8_SRGB), FETCH_FUNCS(L8A8_SRGB), /* Array sRGB formats */ FETCH_FUNCS(L_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 */ FETCH_NULL(B10G10R10A2_UINT), FETCH_NULL(R10G10B10A2_UINT), /* Array signed/unsigned non-normalized integer formats */ FETCH_NULL(A_UINT8), FETCH_NULL(A_UINT16), FETCH_NULL(A_UINT32), FETCH_NULL(A_SINT8), FETCH_NULL(A_SINT16), FETCH_NULL(A_SINT32), FETCH_NULL(I_UINT8), FETCH_NULL(I_UINT16), FETCH_NULL(I_UINT32), FETCH_NULL(I_SINT8), FETCH_NULL(I_SINT16), FETCH_NULL(I_SINT32), FETCH_NULL(L_UINT8), FETCH_NULL(L_UINT16), FETCH_NULL(L_UINT32), FETCH_NULL(L_SINT8), FETCH_NULL(L_SINT16), FETCH_NULL(L_SINT32), FETCH_NULL(LA_UINT8), FETCH_NULL(LA_UINT16), FETCH_NULL(LA_UINT32), FETCH_NULL(LA_SINT8), FETCH_NULL(LA_SINT16), FETCH_NULL(LA_SINT32), FETCH_NULL(R_UINT8), FETCH_NULL(R_UINT16), FETCH_NULL(R_UINT32), FETCH_NULL(R_SINT8), FETCH_NULL(R_SINT16), FETCH_NULL(R_SINT32), FETCH_NULL(RG_UINT8), FETCH_NULL(RG_UINT16), FETCH_NULL(RG_UINT32), FETCH_NULL(RG_SINT8), FETCH_NULL(RG_SINT16), FETCH_NULL(RG_SINT32), FETCH_NULL(RGB_UINT8), FETCH_NULL(RGB_UINT16), FETCH_NULL(RGB_UINT32), FETCH_NULL(RGB_SINT8), FETCH_NULL(RGB_SINT16), FETCH_NULL(RGB_SINT32), FETCH_FUNCS(RGBA_UINT8), FETCH_FUNCS(RGBA_UINT16), FETCH_FUNCS(RGBA_UINT32), FETCH_FUNCS(RGBA_SINT8), FETCH_FUNCS(RGBA_SINT16), FETCH_FUNCS(RGBA_SINT32), FETCH_NULL(RGBX_UINT8), FETCH_NULL(RGBX_UINT16), FETCH_NULL(RGBX_UINT32), FETCH_NULL(RGBX_SINT8), FETCH_NULL(RGBX_SINT16), FETCH_NULL(RGBX_SINT32), /* DXT compressed formats */ { MESA_FORMAT_RGB_DXT1, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_RGBA_DXT1, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_RGBA_DXT3, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_RGBA_DXT5, fetch_compressed, fetch_compressed, fetch_compressed }, /* DXT sRGB compressed formats */ { MESA_FORMAT_SRGB_DXT1, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_SRGBA_DXT1, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_SRGBA_DXT3, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_SRGBA_DXT5, fetch_compressed, fetch_compressed, fetch_compressed }, /* FXT1 compressed formats */ { MESA_FORMAT_RGB_FXT1, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_RGBA_FXT1, fetch_compressed, fetch_compressed, fetch_compressed }, /* RGTC compressed formats */ { MESA_FORMAT_R_RGTC1_UNORM, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_R_RGTC1_SNORM, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_RG_RGTC2_UNORM, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_RG_RGTC2_SNORM, fetch_compressed, fetch_compressed, fetch_compressed }, /* LATC1/2 compressed formats */ { MESA_FORMAT_L_LATC1_UNORM, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_L_LATC1_SNORM, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_LA_LATC2_UNORM, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_LA_LATC2_SNORM, fetch_compressed, fetch_compressed, fetch_compressed }, /* ETC1/2 compressed formats */ { MESA_FORMAT_ETC1_RGB8, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_RGB8, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_SRGB8, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_RGBA8_EAC, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_R11_EAC, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_RG11_EAC, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_SIGNED_R11_EAC, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_SIGNED_RG11_EAC, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1, fetch_compressed, fetch_compressed, fetch_compressed }, { MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1, fetch_compressed, fetch_compressed, fetch_compressed } }; /** * 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; #ifdef DEBUG /* check that the table entries are sorted by format name */ mesa_format fmt; for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) { assert(texfetch_funcs[fmt].Name == fmt); } #endif STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT); if (samp->sRGBDecode == GL_SKIP_DECODE_EXT && _mesa_get_format_color_encoding(format) == GL_SRGB) { format = _mesa_get_srgb_format_linear(format); } assert(format < MESA_FORMAT_COUNT); 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()"); } 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); } } } }