| /* |
| * Mesa 3-D graphics library |
| * Version: 7.7 |
| * |
| * 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 |
| * 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 texfetch.c |
| * |
| * Texel fetch/store functions |
| * |
| * \author Gareth Hughes |
| */ |
| |
| |
| #include "colormac.h" |
| #include "context.h" |
| #include "texcompress.h" |
| #include "texcompress_fxt1.h" |
| #include "texcompress_s3tc.h" |
| #include "texfetch.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) _mesa_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 "texfetch_tmp.h" |
| |
| #define DIM 2 |
| #include "texfetch_tmp.h" |
| |
| #define DIM 3 |
| #include "texfetch_tmp.h" |
| |
| /** |
| * Null texel fetch function. |
| * |
| * Have to have this so the FetchTexel function pointer is never NULL. |
| */ |
| static void fetch_null_texelf( const struct gl_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!"); |
| } |
| |
| static void store_null_texel(struct gl_texture_image *texImage, |
| GLint i, GLint j, GLint k, const void *texel) |
| { |
| (void) texImage; |
| (void) i; |
| (void) j; |
| (void) k; |
| (void) texel; |
| /* no-op */ |
| } |
| |
| |
| |
| /** |
| * Table to map MESA_FORMAT_ to texel fetch/store funcs. |
| * XXX this is somewhat temporary. |
| */ |
| static struct { |
| GLuint Name; |
| FetchTexelFuncF Fetch1D; |
| FetchTexelFuncF Fetch2D; |
| FetchTexelFuncF Fetch3D; |
| StoreTexelFunc StoreTexel; |
| } |
| texfetch_funcs[MESA_FORMAT_COUNT] = |
| { |
| { |
| MESA_FORMAT_SRGB8, |
| fetch_texel_1d_srgb8, |
| fetch_texel_2d_srgb8, |
| fetch_texel_3d_srgb8, |
| store_texel_srgb8 |
| }, |
| { |
| MESA_FORMAT_SRGBA8, |
| fetch_texel_1d_srgba8, |
| fetch_texel_2d_srgba8, |
| fetch_texel_3d_srgba8, |
| store_texel_srgba8 |
| }, |
| { |
| MESA_FORMAT_SARGB8, |
| fetch_texel_1d_sargb8, |
| fetch_texel_2d_sargb8, |
| fetch_texel_3d_sargb8, |
| store_texel_sargb8 |
| }, |
| { |
| MESA_FORMAT_SL8, |
| fetch_texel_1d_sl8, |
| fetch_texel_2d_sl8, |
| fetch_texel_3d_sl8, |
| store_texel_sl8 |
| }, |
| { |
| MESA_FORMAT_SLA8, |
| fetch_texel_1d_sla8, |
| fetch_texel_2d_sla8, |
| fetch_texel_3d_sla8, |
| store_texel_sla8 |
| }, |
| { |
| MESA_FORMAT_RGB_FXT1, |
| NULL, |
| _mesa_fetch_texel_2d_f_rgb_fxt1, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_RGBA_FXT1, |
| NULL, |
| _mesa_fetch_texel_2d_f_rgba_fxt1, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_RGB_DXT1, |
| NULL, |
| _mesa_fetch_texel_2d_f_rgb_dxt1, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_RGBA_DXT1, |
| NULL, |
| _mesa_fetch_texel_2d_f_rgba_dxt1, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_RGBA_DXT3, |
| NULL, |
| _mesa_fetch_texel_2d_f_rgba_dxt3, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_RGBA_DXT5, |
| NULL, |
| _mesa_fetch_texel_2d_f_rgba_dxt5, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_SRGB_DXT1, |
| NULL, |
| _mesa_fetch_texel_2d_f_srgb_dxt1, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_SRGBA_DXT1, |
| NULL, |
| _mesa_fetch_texel_2d_f_srgba_dxt1, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_SRGBA_DXT3, |
| NULL, |
| _mesa_fetch_texel_2d_f_srgba_dxt3, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_SRGBA_DXT5, |
| NULL, |
| _mesa_fetch_texel_2d_f_srgba_dxt5, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_RGBA_FLOAT32, |
| fetch_texel_1d_f_rgba_f32, |
| fetch_texel_2d_f_rgba_f32, |
| fetch_texel_3d_f_rgba_f32, |
| store_texel_rgba_f32 |
| }, |
| { |
| MESA_FORMAT_RGBA_FLOAT16, |
| fetch_texel_1d_f_rgba_f16, |
| fetch_texel_2d_f_rgba_f16, |
| fetch_texel_3d_f_rgba_f16, |
| store_texel_rgba_f16 |
| }, |
| { |
| MESA_FORMAT_RGB_FLOAT32, |
| fetch_texel_1d_f_rgb_f32, |
| fetch_texel_2d_f_rgb_f32, |
| fetch_texel_3d_f_rgb_f32, |
| store_texel_rgb_f32 |
| }, |
| { |
| MESA_FORMAT_RGB_FLOAT16, |
| fetch_texel_1d_f_rgb_f16, |
| fetch_texel_2d_f_rgb_f16, |
| fetch_texel_3d_f_rgb_f16, |
| store_texel_rgb_f16 |
| }, |
| { |
| MESA_FORMAT_ALPHA_FLOAT32, |
| fetch_texel_1d_f_alpha_f32, |
| fetch_texel_2d_f_alpha_f32, |
| fetch_texel_3d_f_alpha_f32, |
| store_texel_alpha_f32 |
| }, |
| { |
| MESA_FORMAT_ALPHA_FLOAT16, |
| fetch_texel_1d_f_alpha_f16, |
| fetch_texel_2d_f_alpha_f16, |
| fetch_texel_3d_f_alpha_f16, |
| store_texel_alpha_f16 |
| }, |
| { |
| MESA_FORMAT_LUMINANCE_FLOAT32, |
| fetch_texel_1d_f_luminance_f32, |
| fetch_texel_2d_f_luminance_f32, |
| fetch_texel_3d_f_luminance_f32, |
| store_texel_luminance_f32 |
| }, |
| { |
| MESA_FORMAT_LUMINANCE_FLOAT16, |
| fetch_texel_1d_f_luminance_f16, |
| fetch_texel_2d_f_luminance_f16, |
| fetch_texel_3d_f_luminance_f16, |
| store_texel_luminance_f16 |
| }, |
| { |
| MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32, |
| fetch_texel_1d_f_luminance_alpha_f32, |
| fetch_texel_2d_f_luminance_alpha_f32, |
| fetch_texel_3d_f_luminance_alpha_f32, |
| store_texel_luminance_alpha_f32 |
| }, |
| { |
| MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16, |
| fetch_texel_1d_f_luminance_alpha_f16, |
| fetch_texel_2d_f_luminance_alpha_f16, |
| fetch_texel_3d_f_luminance_alpha_f16, |
| store_texel_luminance_alpha_f16 |
| }, |
| { |
| MESA_FORMAT_INTENSITY_FLOAT32, |
| fetch_texel_1d_f_intensity_f32, |
| fetch_texel_2d_f_intensity_f32, |
| fetch_texel_3d_f_intensity_f32, |
| store_texel_intensity_f32 |
| }, |
| { |
| MESA_FORMAT_INTENSITY_FLOAT16, |
| fetch_texel_1d_f_intensity_f16, |
| fetch_texel_2d_f_intensity_f16, |
| fetch_texel_3d_f_intensity_f16, |
| store_texel_intensity_f16 |
| }, |
| { |
| MESA_FORMAT_DUDV8, |
| fetch_texel_1d_dudv8, |
| fetch_texel_2d_dudv8, |
| fetch_texel_3d_dudv8, |
| NULL |
| }, |
| { |
| MESA_FORMAT_SIGNED_RGBA8888, |
| fetch_texel_1d_signed_rgba8888, |
| fetch_texel_2d_signed_rgba8888, |
| fetch_texel_3d_signed_rgba8888, |
| store_texel_signed_rgba8888 |
| }, |
| { |
| MESA_FORMAT_SIGNED_RGBA8888_REV, |
| fetch_texel_1d_signed_rgba8888_rev, |
| fetch_texel_2d_signed_rgba8888_rev, |
| fetch_texel_3d_signed_rgba8888_rev, |
| store_texel_signed_rgba8888_rev |
| }, |
| { |
| MESA_FORMAT_SIGNED_RGBA_16, |
| NULL, /* XXX to do */ |
| NULL, |
| NULL, |
| NULL |
| }, |
| { |
| MESA_FORMAT_RGBA8888, |
| fetch_texel_1d_f_rgba8888, |
| fetch_texel_2d_f_rgba8888, |
| fetch_texel_3d_f_rgba8888, |
| store_texel_rgba8888 |
| }, |
| { |
| MESA_FORMAT_RGBA8888_REV, |
| fetch_texel_1d_f_rgba8888_rev, |
| fetch_texel_2d_f_rgba8888_rev, |
| fetch_texel_3d_f_rgba8888_rev, |
| store_texel_rgba8888_rev |
| }, |
| { |
| MESA_FORMAT_ARGB8888, |
| fetch_texel_1d_f_argb8888, |
| fetch_texel_2d_f_argb8888, |
| fetch_texel_3d_f_argb8888, |
| store_texel_argb8888 |
| }, |
| { |
| MESA_FORMAT_ARGB8888_REV, |
| fetch_texel_1d_f_argb8888_rev, |
| fetch_texel_2d_f_argb8888_rev, |
| fetch_texel_3d_f_argb8888_rev, |
| store_texel_argb8888_rev |
| }, |
| { |
| MESA_FORMAT_XRGB8888, |
| fetch_texel_1d_f_xrgb8888, |
| fetch_texel_2d_f_xrgb8888, |
| fetch_texel_3d_f_xrgb8888, |
| store_texel_xrgb8888 |
| }, |
| { |
| MESA_FORMAT_RGB888, |
| fetch_texel_1d_f_rgb888, |
| fetch_texel_2d_f_rgb888, |
| fetch_texel_3d_f_rgb888, |
| store_texel_rgb888 |
| }, |
| { |
| MESA_FORMAT_BGR888, |
| fetch_texel_1d_f_bgr888, |
| fetch_texel_2d_f_bgr888, |
| fetch_texel_3d_f_bgr888, |
| store_texel_bgr888 |
| }, |
| { |
| MESA_FORMAT_RGB565, |
| fetch_texel_1d_f_rgb565, |
| fetch_texel_2d_f_rgb565, |
| fetch_texel_3d_f_rgb565, |
| store_texel_rgb565 |
| }, |
| { |
| MESA_FORMAT_RGB565_REV, |
| fetch_texel_1d_f_rgb565_rev, |
| fetch_texel_2d_f_rgb565_rev, |
| fetch_texel_3d_f_rgb565_rev, |
| store_texel_rgb565_rev |
| }, |
| { |
| MESA_FORMAT_ARGB4444, |
| fetch_texel_1d_f_argb4444, |
| fetch_texel_2d_f_argb4444, |
| fetch_texel_3d_f_argb4444, |
| store_texel_argb4444 |
| }, |
| { |
| MESA_FORMAT_ARGB4444_REV, |
| fetch_texel_1d_f_argb4444_rev, |
| fetch_texel_2d_f_argb4444_rev, |
| fetch_texel_3d_f_argb4444_rev, |
| store_texel_argb4444_rev |
| }, |
| { |
| MESA_FORMAT_RGBA5551, |
| fetch_texel_1d_f_rgba5551, |
| fetch_texel_2d_f_rgba5551, |
| fetch_texel_3d_f_rgba5551, |
| store_texel_rgba5551 |
| }, |
| { |
| MESA_FORMAT_ARGB1555, |
| fetch_texel_1d_f_argb1555, |
| fetch_texel_2d_f_argb1555, |
| fetch_texel_3d_f_argb1555, |
| store_texel_argb1555 |
| }, |
| { |
| MESA_FORMAT_ARGB1555_REV, |
| fetch_texel_1d_f_argb1555_rev, |
| fetch_texel_2d_f_argb1555_rev, |
| fetch_texel_3d_f_argb1555_rev, |
| store_texel_argb1555_rev |
| }, |
| { |
| MESA_FORMAT_AL88, |
| fetch_texel_1d_f_al88, |
| fetch_texel_2d_f_al88, |
| fetch_texel_3d_f_al88, |
| store_texel_al88 |
| }, |
| { |
| MESA_FORMAT_AL88_REV, |
| fetch_texel_1d_f_al88_rev, |
| fetch_texel_2d_f_al88_rev, |
| fetch_texel_3d_f_al88_rev, |
| store_texel_al88_rev |
| }, |
| { |
| MESA_FORMAT_RGB332, |
| fetch_texel_1d_f_rgb332, |
| fetch_texel_2d_f_rgb332, |
| fetch_texel_3d_f_rgb332, |
| store_texel_rgb332 |
| }, |
| { |
| MESA_FORMAT_A8, |
| fetch_texel_1d_f_a8, |
| fetch_texel_2d_f_a8, |
| fetch_texel_3d_f_a8, |
| store_texel_a8 |
| }, |
| { |
| MESA_FORMAT_L8, |
| fetch_texel_1d_f_l8, |
| fetch_texel_2d_f_l8, |
| fetch_texel_3d_f_l8, |
| store_texel_l8 |
| }, |
| { |
| MESA_FORMAT_I8, |
| fetch_texel_1d_f_i8, |
| fetch_texel_2d_f_i8, |
| fetch_texel_3d_f_i8, |
| store_texel_i8 |
| }, |
| { |
| MESA_FORMAT_CI8, |
| fetch_texel_1d_f_ci8, |
| fetch_texel_2d_f_ci8, |
| fetch_texel_3d_f_ci8, |
| store_texel_ci8 |
| }, |
| { |
| MESA_FORMAT_YCBCR, |
| fetch_texel_1d_f_ycbcr, |
| fetch_texel_2d_f_ycbcr, |
| fetch_texel_3d_f_ycbcr, |
| store_texel_ycbcr |
| }, |
| { |
| MESA_FORMAT_YCBCR_REV, |
| fetch_texel_1d_f_ycbcr_rev, |
| fetch_texel_2d_f_ycbcr_rev, |
| fetch_texel_3d_f_ycbcr_rev, |
| store_texel_ycbcr_rev |
| }, |
| { |
| MESA_FORMAT_Z24_S8, |
| fetch_texel_1d_f_z24_s8, |
| fetch_texel_2d_f_z24_s8, |
| fetch_texel_3d_f_z24_s8, |
| store_texel_z24_s8 |
| }, |
| { |
| MESA_FORMAT_S8_Z24, |
| fetch_texel_1d_f_s8_z24, |
| fetch_texel_2d_f_s8_z24, |
| fetch_texel_3d_f_s8_z24, |
| store_texel_s8_z24 |
| }, |
| { |
| MESA_FORMAT_Z16, |
| fetch_texel_1d_f_z16, |
| fetch_texel_2d_f_z16, |
| fetch_texel_3d_f_z16, |
| store_texel_z16 |
| }, |
| { |
| MESA_FORMAT_X8_Z24, |
| fetch_texel_1d_f_s8_z24, |
| fetch_texel_2d_f_s8_z24, |
| fetch_texel_3d_f_s8_z24, |
| store_texel_s8_z24 |
| }, |
| { |
| MESA_FORMAT_Z24_X8, |
| fetch_texel_1d_f_z24_s8, |
| fetch_texel_2d_f_z24_s8, |
| fetch_texel_3d_f_z24_s8, |
| store_texel_z24_s8 |
| }, |
| { |
| MESA_FORMAT_Z32, |
| fetch_texel_1d_f_z32, |
| fetch_texel_2d_f_z32, |
| fetch_texel_3d_f_z32, |
| store_texel_z32 |
| } |
| }; |
| |
| |
| static FetchTexelFuncF |
| _mesa_get_texel_fetch_func(gl_format format, GLuint dims) |
| { |
| FetchTexelFuncF f; |
| GLuint i; |
| /* XXX replace loop with direct table lookup */ |
| for (i = 0; i < MESA_FORMAT_COUNT; i++) { |
| if (texfetch_funcs[i].Name == format) { |
| switch (dims) { |
| case 1: |
| f = texfetch_funcs[i].Fetch1D; |
| break; |
| case 2: |
| f = texfetch_funcs[i].Fetch2D; |
| break; |
| case 3: |
| f = texfetch_funcs[i].Fetch3D; |
| break; |
| } |
| if (!f) |
| f = fetch_null_texelf; |
| return f; |
| } |
| } |
| return NULL; |
| } |
| |
| |
| StoreTexelFunc |
| _mesa_get_texel_store_func(gl_format format) |
| { |
| GLuint i; |
| /* XXX replace loop with direct table lookup */ |
| for (i = 0; i < MESA_FORMAT_COUNT; i++) { |
| if (texfetch_funcs[i].Name == format) { |
| if (texfetch_funcs[i].StoreTexel) |
| return texfetch_funcs[i].StoreTexel; |
| else |
| return store_null_texel; |
| } |
| } |
| return NULL; |
| } |
| |
| |
| |
| /** |
| * Adaptor for fetching a GLchan texel from a float-valued texture. |
| */ |
| static void |
| fetch_texel_float_to_chan(const struct gl_texture_image *texImage, |
| GLint i, GLint j, GLint k, GLchan *texelOut) |
| { |
| GLfloat temp[4]; |
| GLenum baseFormat = _mesa_get_format_base_format(texImage->TexFormat); |
| |
| ASSERT(texImage->FetchTexelf); |
| texImage->FetchTexelf(texImage, i, j, k, temp); |
| if (baseFormat == GL_DEPTH_COMPONENT || |
| baseFormat == GL_DEPTH_STENCIL_EXT) { |
| /* just one channel */ |
| UNCLAMPED_FLOAT_TO_CHAN(texelOut[0], temp[0]); |
| } |
| else { |
| /* four channels */ |
| UNCLAMPED_FLOAT_TO_CHAN(texelOut[0], temp[0]); |
| UNCLAMPED_FLOAT_TO_CHAN(texelOut[1], temp[1]); |
| UNCLAMPED_FLOAT_TO_CHAN(texelOut[2], temp[2]); |
| UNCLAMPED_FLOAT_TO_CHAN(texelOut[3], temp[3]); |
| } |
| } |
| |
| |
| #if 0 |
| /** |
| * Adaptor for fetching a float texel from a GLchan-valued texture. |
| */ |
| static void |
| fetch_texel_chan_to_float(const struct gl_texture_image *texImage, |
| GLint i, GLint j, GLint k, GLfloat *texelOut) |
| { |
| GLchan temp[4]; |
| GLenum baseFormat = _mesa_get_format_base_format(texImage->TexFormat); |
| |
| ASSERT(texImage->FetchTexelc); |
| texImage->FetchTexelc(texImage, i, j, k, temp); |
| if (baseFormat == GL_DEPTH_COMPONENT || |
| baseFormat == GL_DEPTH_STENCIL_EXT) { |
| /* just one channel */ |
| texelOut[0] = CHAN_TO_FLOAT(temp[0]); |
| } |
| else { |
| /* four channels */ |
| texelOut[0] = CHAN_TO_FLOAT(temp[0]); |
| texelOut[1] = CHAN_TO_FLOAT(temp[1]); |
| texelOut[2] = CHAN_TO_FLOAT(temp[2]); |
| texelOut[3] = CHAN_TO_FLOAT(temp[3]); |
| } |
| } |
| #endif |
| |
| |
| /** |
| * Initialize the texture image's FetchTexelc and FetchTexelf methods. |
| */ |
| void |
| _mesa_set_fetch_functions(struct gl_texture_image *texImage, GLuint dims) |
| { |
| ASSERT(dims == 1 || dims == 2 || dims == 3); |
| ASSERT(texImage->TexFormat); |
| |
| if (!texImage->FetchTexelf) { |
| texImage->FetchTexelf = |
| _mesa_get_texel_fetch_func(texImage->TexFormat, dims); |
| } |
| |
| /* now check if we need to use a float/chan adaptor */ |
| if (!texImage->FetchTexelc) { |
| texImage->FetchTexelc = fetch_texel_float_to_chan; |
| } |
| |
| ASSERT(texImage->FetchTexelc); |
| ASSERT(texImage->FetchTexelf); |
| } |