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/*
* Copyright (C) 2011 LunarG, 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 (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_etc.c
* GL_OES_compressed_ETC1_RGB8_texture support.
*/
#include "mfeatures.h"
#include "texcompress.h"
#include "texcompress_etc.h"
#include "texstore.h"
#include "macros.h"
#include "swrast/s_context.h"
GLboolean
_mesa_texstore_etc1_rgb8(TEXSTORE_PARAMS)
{
/* GL_ETC1_RGB8_OES is only valid in glCompressedTexImage2D */
ASSERT(0);
return GL_FALSE;
}
/* define etc1_parse_block and etc. */
#define UINT8_TYPE GLubyte
#define TAG(x) x
#include "texcompress_etc_tmp.h"
#undef TAG
#undef UINT8_TYPE
void
_mesa_fetch_texel_2d_f_etc1_rgb8(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
struct etc1_block block;
GLubyte dst[3];
const GLubyte *src;
src = (const GLubyte *) texImage->Data +
(((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 8;
etc1_parse_block(&block, src);
etc1_fetch_texel(&block, i % 4, j % 4, dst);
texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]);
texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]);
texel[BCOMP] = UBYTE_TO_FLOAT(dst[2]);
texel[ACOMP] = 1.0f;
}
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