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/*
* Copyright (C) 2014 Intel Corporation
*
* 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 (including the next
* paragraph) 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 texcompress_bptc.c
* GL_ARB_texture_compression_bptc support.
*/
#include <stdbool.h>
#include "texcompress.h"
#include "texcompress_bptc.h"
#include "texcompress_bptc_tmp.h"
#include "texstore.h"
#include "image.h"
#include "mtypes.h"
static void
fetch_bptc_rgb_float(const GLubyte *map,
GLint rowStride, GLint i, GLint j,
GLfloat *texel,
bool is_signed)
{
const GLubyte *block;
block = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 16;
fetch_rgb_float_from_block(block, texel, (i % 4) + (j % 4) * 4, is_signed);
}
static void
fetch_bptc_rgb_signed_float(const GLubyte *map,
GLint rowStride, GLint i, GLint j,
GLfloat *texel)
{
fetch_bptc_rgb_float(map, rowStride, i, j, texel, true);
}
static void
fetch_bptc_rgb_unsigned_float(const GLubyte *map,
GLint rowStride, GLint i, GLint j,
GLfloat *texel)
{
fetch_bptc_rgb_float(map, rowStride, i, j, texel, false);
}
static void
fetch_bptc_rgba_unorm_bytes(const GLubyte *map,
GLint rowStride, GLint i, GLint j,
GLubyte *texel)
{
const GLubyte *block;
block = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 16;
fetch_rgba_unorm_from_block(block, texel, (i % 4) + (j % 4) * 4);
}
static void
fetch_bptc_rgba_unorm(const GLubyte *map,
GLint rowStride, GLint i, GLint j,
GLfloat *texel)
{
GLubyte texel_bytes[4];
fetch_bptc_rgba_unorm_bytes(map, rowStride, i, j, texel_bytes);
texel[RCOMP] = UBYTE_TO_FLOAT(texel_bytes[0]);
texel[GCOMP] = UBYTE_TO_FLOAT(texel_bytes[1]);
texel[BCOMP] = UBYTE_TO_FLOAT(texel_bytes[2]);
texel[ACOMP] = UBYTE_TO_FLOAT(texel_bytes[3]);
}
static void
fetch_bptc_srgb_alpha_unorm(const GLubyte *map,
GLint rowStride, GLint i, GLint j,
GLfloat *texel)
{
GLubyte texel_bytes[4];
fetch_bptc_rgba_unorm_bytes(map, rowStride, i, j, texel_bytes);
texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(texel_bytes[0]);
texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(texel_bytes[1]);
texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(texel_bytes[2]);
texel[ACOMP] = UBYTE_TO_FLOAT(texel_bytes[3]);
}
compressed_fetch_func
_mesa_get_bptc_fetch_func(mesa_format format)
{
switch (format) {
case MESA_FORMAT_BPTC_RGBA_UNORM:
return fetch_bptc_rgba_unorm;
case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
return fetch_bptc_srgb_alpha_unorm;
case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
return fetch_bptc_rgb_signed_float;
case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
return fetch_bptc_rgb_unsigned_float;
default:
return NULL;
}
}
GLboolean
_mesa_texstore_bptc_rgba_unorm(TEXSTORE_PARAMS)
{
const GLubyte *pixels;
const GLubyte *tempImage = NULL;
int rowstride;
if (srcFormat != GL_RGBA ||
srcType != GL_UNSIGNED_BYTE ||
ctx->_ImageTransferState ||
srcPacking->SwapBytes) {
/* convert image to RGBA/ubyte */
GLubyte *tempImageSlices[1];
int rgbaRowStride = 4 * srcWidth * sizeof(GLubyte);
tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(GLubyte));
if (!tempImage)
return GL_FALSE; /* out of memory */
tempImageSlices[0] = (GLubyte *) tempImage;
_mesa_texstore(ctx, dims,
baseInternalFormat,
_mesa_little_endian() ? MESA_FORMAT_R8G8B8A8_UNORM
: MESA_FORMAT_A8B8G8R8_UNORM,
rgbaRowStride, tempImageSlices,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
pixels = tempImage;
rowstride = srcWidth * 4;
} else {
pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
srcFormat, srcType, 0, 0);
rowstride = _mesa_image_row_stride(srcPacking, srcWidth,
srcFormat, srcType);
}
compress_rgba_unorm(srcWidth, srcHeight,
pixels, rowstride,
dstSlices[0], dstRowStride);
free((void *) tempImage);
return GL_TRUE;
}
static GLboolean
texstore_bptc_rgb_float(TEXSTORE_PARAMS,
bool is_signed)
{
const float *pixels;
const float *tempImage = NULL;
int rowstride;
if (srcFormat != GL_RGB ||
srcType != GL_FLOAT ||
ctx->_ImageTransferState ||
srcPacking->SwapBytes) {
/* convert image to RGB/float */
GLfloat *tempImageSlices[1];
int rgbRowStride = 3 * srcWidth * sizeof(GLfloat);
tempImage = malloc(srcWidth * srcHeight * 3 * sizeof(GLfloat));
if (!tempImage)
return GL_FALSE; /* out of memory */
tempImageSlices[0] = (GLfloat *) tempImage;
_mesa_texstore(ctx, dims,
baseInternalFormat,
MESA_FORMAT_RGB_FLOAT32,
rgbRowStride, (GLubyte **)tempImageSlices,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
pixels = tempImage;
rowstride = srcWidth * sizeof(float) * 3;
} else {
pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
srcFormat, srcType, 0, 0);
rowstride = _mesa_image_row_stride(srcPacking, srcWidth,
srcFormat, srcType);
}
compress_rgb_float(srcWidth, srcHeight,
pixels, rowstride,
dstSlices[0], dstRowStride,
is_signed);
free((void *) tempImage);
return GL_TRUE;
}
GLboolean
_mesa_texstore_bptc_rgb_signed_float(TEXSTORE_PARAMS)
{
assert(dstFormat == MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT);
return texstore_bptc_rgb_float(ctx, dims, baseInternalFormat,
dstFormat, dstRowStride, dstSlices,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType,
srcAddr, srcPacking,
true /* signed */);
}
GLboolean
_mesa_texstore_bptc_rgb_unsigned_float(TEXSTORE_PARAMS)
{
assert(dstFormat == MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT);
return texstore_bptc_rgb_float(ctx, dims, baseInternalFormat,
dstFormat, dstRowStride, dstSlices,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType,
srcAddr, srcPacking,
false /* unsigned */);
}
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