/*
* 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/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_NULL(NAME) \
{ \
MESA_FORMAT_ ## NAME, \
NULL, \
NULL, \
NULL \
}
#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 {
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_NULL(R10G10B10X2_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_NULL(R3G3B2_UNORM),
FETCH_NULL(A4B4G4R4_UNORM),
FETCH_NULL(R4G4B4A4_UNORM),
FETCH_NULL(R5G5B5A1_UNORM),
FETCH_NULL(A2B10G10R10_UNORM),
FETCH_NULL(A2R10G10B10_UNORM),
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(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),
FETCH_FUNCS(A8L8_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_FUNCS(A8R8G8B8_SRGB),
FETCH_NULL(B8G8R8X8_SRGB),
FETCH_NULL(X8R8G8B8_SRGB),
FETCH_FUNCS(R8G8B8A8_SRGB),
FETCH_FUNCS(R8G8B8X8_SRGB),
FETCH_FUNCS(X8B8G8R8_SRGB),
FETCH_FUNCS(L8A8_SRGB),
FETCH_FUNCS(A8L8_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(A8B8G8R8_UINT),
FETCH_NULL(A8R8G8B8_UINT),
FETCH_NULL(R8G8B8A8_UINT),
FETCH_NULL(B8G8R8A8_UINT),
FETCH_NULL(B10G10R10A2_UINT),
FETCH_NULL(R10G10B10A2_UINT),
FETCH_NULL(A2B10G10R10_UINT),
FETCH_NULL(A2R10G10B10_UINT),
FETCH_NULL(B5G6R5_UINT),
FETCH_NULL(R5G6B5_UINT),
FETCH_NULL(B2G3R3_UINT),
FETCH_NULL(R3G3B2_UINT),
FETCH_NULL(A4B4G4R4_UINT),
FETCH_NULL(R4G4B4A4_UINT),
FETCH_NULL(B4G4R4A4_UINT),
FETCH_NULL(A4R4G4B4_UINT),
FETCH_NULL(A1B5G5R5_UINT),
FETCH_NULL(B5G5R5A1_UINT),
FETCH_NULL(A1R5G5B5_UINT),
FETCH_NULL(R5G5B5A1_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 */
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),
/* ASTC compressed formats */
FETCH_NULL(RGBA_ASTC_4x4),
FETCH_NULL(RGBA_ASTC_5x4),
FETCH_NULL(RGBA_ASTC_5x5),
FETCH_NULL(RGBA_ASTC_6x5),
FETCH_NULL(RGBA_ASTC_6x6),
FETCH_NULL(RGBA_ASTC_8x5),
FETCH_NULL(RGBA_ASTC_8x6),
FETCH_NULL(RGBA_ASTC_8x8),
FETCH_NULL(RGBA_ASTC_10x5),
FETCH_NULL(RGBA_ASTC_10x6),
FETCH_NULL(RGBA_ASTC_10x8),
FETCH_NULL(RGBA_ASTC_10x10),
FETCH_NULL(RGBA_ASTC_12x10),
FETCH_NULL(RGBA_ASTC_12x12),
FETCH_NULL(SRGB8_ALPHA8_ASTC_4x4),
FETCH_NULL(SRGB8_ALPHA8_ASTC_5x4),
FETCH_NULL(SRGB8_ALPHA8_ASTC_5x5),
FETCH_NULL(SRGB8_ALPHA8_ASTC_6x5),
FETCH_NULL(SRGB8_ALPHA8_ASTC_6x6),
FETCH_NULL(SRGB8_ALPHA8_ASTC_8x5),
FETCH_NULL(SRGB8_ALPHA8_ASTC_8x6),
FETCH_NULL(SRGB8_ALPHA8_ASTC_8x8),
FETCH_NULL(SRGB8_ALPHA8_ASTC_10x5),
FETCH_NULL(SRGB8_ALPHA8_ASTC_10x6),
FETCH_NULL(SRGB8_ALPHA8_ASTC_10x8),
FETCH_NULL(SRGB8_ALPHA8_ASTC_10x10),
FETCH_NULL(SRGB8_ALPHA8_ASTC_12x10),
FETCH_NULL(SRGB8_ALPHA8_ASTC_12x12),
FETCH_NULL(RGBA_ASTC_3x3x3),
FETCH_NULL(RGBA_ASTC_4x3x3),
FETCH_NULL(RGBA_ASTC_4x4x3),
FETCH_NULL(RGBA_ASTC_4x4x4),
FETCH_NULL(RGBA_ASTC_5x4x4),
FETCH_NULL(RGBA_ASTC_5x5x4),
FETCH_NULL(RGBA_ASTC_5x5x5),
FETCH_NULL(RGBA_ASTC_6x5x5),
FETCH_NULL(RGBA_ASTC_6x6x5),
FETCH_NULL(RGBA_ASTC_6x6x6),
FETCH_NULL(SRGB8_ALPHA8_ASTC_3x3x3),
FETCH_NULL(SRGB8_ALPHA8_ASTC_4x3x3),
FETCH_NULL(SRGB8_ALPHA8_ASTC_4x4x3),
FETCH_NULL(SRGB8_ALPHA8_ASTC_4x4x4),
FETCH_NULL(SRGB8_ALPHA8_ASTC_5x4x4),
FETCH_NULL(SRGB8_ALPHA8_ASTC_5x5x4),
FETCH_NULL(SRGB8_ALPHA8_ASTC_5x5x5),
FETCH_NULL(SRGB8_ALPHA8_ASTC_6x5x5),
FETCH_NULL(SRGB8_ALPHA8_ASTC_6x6x5),
FETCH_NULL(SRGB8_ALPHA8_ASTC_6x6x6)
};
/**
* 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(ARRAY_SIZE(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);
}
}
}
}