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reactos/dll/opengl/mesa/swrast/s_texfetch_tmp.h

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/*
* Mesa 3-D graphics library
* Version: 7.7
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (c) 2008-2009 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_tmp.h
* Texel fetch functions template.
*
* This template file is used by texfetch.c to generate texel fetch functions
* for 1-D, 2-D and 3-D texture images.
*
* It should be expanded by defining \p DIM as the number texture dimensions
* (1, 2 or 3). According to the value of \p DIM a series of macros is defined
* for the texel lookup in the gl_texture_image::Data.
*
* \author Gareth Hughes
* \author Brian Paul
*/
#if DIM == 1
#define TEXEL_ADDR( type, image, i, j, k, size ) \
((void) (j), (void) (k), ((type *)(image)->Map + (i) * (size)))
#define FETCH(x) fetch_texel_1d_##x
#elif DIM == 2
#define TEXEL_ADDR( type, image, i, j, k, size ) \
((void) (k), \
((type *)(image)->Map + ((image)->RowStride * (j) + (i)) * (size)))
#define FETCH(x) fetch_texel_2d_##x
#elif DIM == 3
#define TEXEL_ADDR( type, image, i, j, k, size ) \
((type *)(image)->Map + ((image)->ImageOffsets[k] \
+ (image)->RowStride * (j) + (i)) * (size))
#define FETCH(x) fetch_texel_3d_##x
#else
#error illegal number of texture dimensions
#endif
/* MESA_FORMAT_Z32 ***********************************************************/
/* Fetch depth texel from 1D, 2D or 3D 32-bit depth texture,
* returning 1 GLfloat.
* Note: no GLchan version of this function.
*/
static void FETCH(f_z32)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[0] = src[0] * (1.0F / 0xffffffff);
}
/* MESA_FORMAT_Z16 ***********************************************************/
/* Fetch depth texel from 1D, 2D or 3D 16-bit depth texture,
* returning 1 GLfloat.
* Note: no GLchan version of this function.
*/
static void FETCH(f_z16)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[0] = src[0] * (1.0F / 65535.0F);
}
/*
* Begin Hardware formats
*/
/* MESA_FORMAT_RGBA8888 ******************************************************/
/* Fetch texel from 1D, 2D or 3D rgba8888 texture, return 4 GLfloats */
static void FETCH(f_rgba8888)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 24) );
texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 8) & 0xff );
texel[ACOMP] = UBYTE_TO_FLOAT( (s ) & 0xff );
}
/* MESA_FORMAT_RGBA888_REV ***************************************************/
/* Fetch texel from 1D, 2D or 3D abgr8888 texture, return 4 GLchans */
static void FETCH(f_rgba8888_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_FLOAT( (s ) & 0xff );
texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 8) & 0xff );
texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
texel[ACOMP] = UBYTE_TO_FLOAT( (s >> 24) );
}
/* MESA_FORMAT_ARGB8888 ******************************************************/
/* Fetch texel from 1D, 2D or 3D argb8888 texture, return 4 GLchans */
static void FETCH(f_argb8888)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 8) & 0xff );
texel[BCOMP] = UBYTE_TO_FLOAT( (s ) & 0xff );
texel[ACOMP] = UBYTE_TO_FLOAT( (s >> 24) );
}
/* MESA_FORMAT_ARGB8888_REV **************************************************/
/* Fetch texel from 1D, 2D or 3D argb8888_rev texture, return 4 GLfloats */
static void FETCH(f_argb8888_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 8) & 0xff );
texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 24) );
texel[ACOMP] = UBYTE_TO_FLOAT( (s ) & 0xff );
}
/* MESA_FORMAT_RGBX8888 ******************************************************/
/* Fetch texel from 1D, 2D or 3D rgbx8888 texture, return 4 GLfloats */
static void FETCH(f_rgbx8888)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 24) );
texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 8) & 0xff );
texel[ACOMP] = 1.0f;
}
/* MESA_FORMAT_RGBX888_REV ***************************************************/
/* Fetch texel from 1D, 2D or 3D rgbx8888_rev texture, return 4 GLchans */
static void FETCH(f_rgbx8888_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_FLOAT( (s ) & 0xff );
texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 8) & 0xff );
texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
texel[ACOMP] = 1.0f;
}
/* MESA_FORMAT_XRGB8888 ******************************************************/
/* Fetch texel from 1D, 2D or 3D xrgb8888 texture, return 4 GLchans */
static void FETCH(f_xrgb8888)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 8) & 0xff );
texel[BCOMP] = UBYTE_TO_FLOAT( (s ) & 0xff );
texel[ACOMP] = 1.0f;
}
/* MESA_FORMAT_XRGB8888_REV **************************************************/
/* Fetch texel from 1D, 2D or 3D xrgb8888_rev texture, return 4 GLfloats */
static void FETCH(f_xrgb8888_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 8) & 0xff );
texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 24) );
texel[ACOMP] = 1.0f;
}
/* MESA_FORMAT_RGB888 ********************************************************/
/* Fetch texel from 1D, 2D or 3D rgb888 texture, return 4 GLchans */
static void FETCH(f_rgb888)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
texel[RCOMP] = UBYTE_TO_FLOAT( src[2] );
texel[GCOMP] = UBYTE_TO_FLOAT( src[1] );
texel[BCOMP] = UBYTE_TO_FLOAT( src[0] );
texel[ACOMP] = 1.0F;
}
/* MESA_FORMAT_BGR888 ********************************************************/
/* Fetch texel from 1D, 2D or 3D bgr888 texture, return 4 GLchans */
static void FETCH(f_bgr888)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
texel[RCOMP] = UBYTE_TO_FLOAT( src[0] );
texel[GCOMP] = UBYTE_TO_FLOAT( src[1] );
texel[BCOMP] = UBYTE_TO_FLOAT( src[2] );
texel[ACOMP] = 1.0F;
}
/* use color expansion like (g << 2) | (g >> 4) (does somewhat random rounding)
instead of slow (g << 2) * 255 / 252 (always rounds down) */
/* MESA_FORMAT_RGB565 ********************************************************/
/* Fetch texel from 1D, 2D or 3D rgb565 texture, return 4 GLchans */
static void FETCH(f_rgb565)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = *src;
texel[RCOMP] = ((s >> 11) & 0x1f) * (1.0F / 31.0F);
texel[GCOMP] = ((s >> 5 ) & 0x3f) * (1.0F / 63.0F);
texel[BCOMP] = ((s ) & 0x1f) * (1.0F / 31.0F);
texel[ACOMP] = 1.0F;
}
/* MESA_FORMAT_RGB565_REV ****************************************************/
/* Fetch texel from 1D, 2D or 3D rgb565_rev texture, return 4 GLchans */
static void FETCH(f_rgb565_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = (*src >> 8) | (*src << 8); /* byte swap */
texel[RCOMP] = UBYTE_TO_FLOAT( ((s >> 8) & 0xf8) | ((s >> 13) & 0x7) );
texel[GCOMP] = UBYTE_TO_FLOAT( ((s >> 3) & 0xfc) | ((s >> 9) & 0x3) );
texel[BCOMP] = UBYTE_TO_FLOAT( ((s << 3) & 0xf8) | ((s >> 2) & 0x7) );
texel[ACOMP] = 1.0F;
}
/* MESA_FORMAT_ARGB4444 ******************************************************/
/* Fetch texel from 1D, 2D or 3D argb444 texture, return 4 GLchans */
static void FETCH(f_argb4444)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = *src;
texel[RCOMP] = ((s >> 8) & 0xf) * (1.0F / 15.0F);
texel[GCOMP] = ((s >> 4) & 0xf) * (1.0F / 15.0F);
texel[BCOMP] = ((s ) & 0xf) * (1.0F / 15.0F);
texel[ACOMP] = ((s >> 12) & 0xf) * (1.0F / 15.0F);
}
/* MESA_FORMAT_ARGB4444_REV **************************************************/
/* Fetch texel from 1D, 2D or 3D argb4444_rev texture, return 4 GLchans */
static void FETCH(f_argb4444_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] = ((s ) & 0xf) * (1.0F / 15.0F);
texel[GCOMP] = ((s >> 12) & 0xf) * (1.0F / 15.0F);
texel[BCOMP] = ((s >> 8) & 0xf) * (1.0F / 15.0F);
texel[ACOMP] = ((s >> 4) & 0xf) * (1.0F / 15.0F);
}
/* MESA_FORMAT_RGBA5551 ******************************************************/
/* Fetch texel from 1D, 2D or 3D argb1555 texture, return 4 GLchans */
static void FETCH(f_rgba5551)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = *src;
texel[RCOMP] = ((s >> 11) & 0x1f) * (1.0F / 31.0F);
texel[GCOMP] = ((s >> 6) & 0x1f) * (1.0F / 31.0F);
texel[BCOMP] = ((s >> 1) & 0x1f) * (1.0F / 31.0F);
texel[ACOMP] = ((s ) & 0x01) * 1.0F;
}
/* MESA_FORMAT_ARGB1555 ******************************************************/
/* Fetch texel from 1D, 2D or 3D argb1555 texture, return 4 GLchans */
static void FETCH(f_argb1555)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = *src;
texel[RCOMP] = ((s >> 10) & 0x1f) * (1.0F / 31.0F);
texel[GCOMP] = ((s >> 5) & 0x1f) * (1.0F / 31.0F);
texel[BCOMP] = ((s >> 0) & 0x1f) * (1.0F / 31.0F);
texel[ACOMP] = ((s >> 15) & 0x01) * 1.0F;
}
/* MESA_FORMAT_ARGB1555_REV **************************************************/
/* Fetch texel from 1D, 2D or 3D argb1555_rev texture, return 4 GLchans */
static void FETCH(f_argb1555_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = (*src << 8) | (*src >> 8); /* byteswap */
texel[RCOMP] = UBYTE_TO_FLOAT( ((s >> 7) & 0xf8) | ((s >> 12) & 0x7) );
texel[GCOMP] = UBYTE_TO_FLOAT( ((s >> 2) & 0xf8) | ((s >> 7) & 0x7) );
texel[BCOMP] = UBYTE_TO_FLOAT( ((s << 3) & 0xf8) | ((s >> 2) & 0x7) );
texel[ACOMP] = UBYTE_TO_FLOAT( ((s >> 15) & 0x01) * 255 );
}
/* MESA_FORMAT_AL44 **********************************************************/
/* Fetch texel from 1D, 2D or 3D al44 texture, return 4 GLchans */
static void FETCH(f_al44)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte s = *TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = (s & 0xf) * (1.0F / 15.0F);
texel[ACOMP] = ((s >> 4) & 0xf) * (1.0F / 15.0F);
}
/* MESA_FORMAT_AL88 **********************************************************/
/* Fetch texel from 1D, 2D or 3D al88 texture, return 4 GLchans */
static void FETCH(f_al88)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = UBYTE_TO_FLOAT( s & 0xff );
texel[ACOMP] = UBYTE_TO_FLOAT( s >> 8 );
}
/* MESA_FORMAT_AL88_REV ******************************************************/
/* Fetch texel from 1D, 2D or 3D al88_rev texture, return 4 GLchans */
static void FETCH(f_al88_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = UBYTE_TO_FLOAT( s >> 8 );
texel[ACOMP] = UBYTE_TO_FLOAT( s & 0xff );
}
/* MESA_FORMAT_AL1616 ********************************************************/
/* Fetch texel from 1D, 2D or 3D al1616 texture, return 4 GLchans */
static void FETCH(f_al1616)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = USHORT_TO_FLOAT( s & 0xffff );
texel[ACOMP] = USHORT_TO_FLOAT( s >> 16 );
}
/* MESA_FORMAT_AL1616_REV ****************************************************/
/* Fetch texel from 1D, 2D or 3D al1616_rev texture, return 4 GLchans */
static void FETCH(f_al1616_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = USHORT_TO_FLOAT( s >> 16 );
texel[ACOMP] = USHORT_TO_FLOAT( s & 0xffff );
}
/* MESA_FORMAT_RGB332 ********************************************************/
/* Fetch texel from 1D, 2D or 3D rgb332 texture, return 4 GLchans */
static void FETCH(f_rgb332)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
const GLubyte s = *src;
texel[RCOMP] = ((s >> 5) & 0x7) * (1.0F / 7.0F);
texel[GCOMP] = ((s >> 2) & 0x7) * (1.0F / 7.0F);
texel[BCOMP] = ((s ) & 0x3) * (1.0F / 3.0F);
texel[ACOMP] = 1.0F;
}
/* MESA_FORMAT_A8 ************************************************************/
/* Fetch texel from 1D, 2D or 3D a8 texture, return 4 GLchans */
static void FETCH(f_a8)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0.0F;
texel[ACOMP] = UBYTE_TO_FLOAT( src[0] );
}
/* MESA_FORMAT_A16 ************************************************************/
/* Fetch texel from 1D, 2D or 3D a8 texture, return 4 GLchans */
static void FETCH(f_a16)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0.0F;
texel[ACOMP] = USHORT_TO_FLOAT( src[0] );
}
/* MESA_FORMAT_L8 ************************************************************/
/* Fetch texel from 1D, 2D or 3D l8 texture, return 4 GLchans */
static void FETCH(f_l8)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = UBYTE_TO_FLOAT( src[0] );
texel[ACOMP] = 1.0F;
}
/* MESA_FORMAT_L16 ***********************************************************/
/* Fetch texel from 1D, 2D or 3D l16 texture, return 4 GLchans */
static void FETCH(f_l16)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = USHORT_TO_FLOAT( src[0] );
texel[ACOMP] = 1.0F;
}
/* MESA_FORMAT_I8 ************************************************************/
/* Fetch texel from 1D, 2D or 3D i8 texture, return 4 GLchans */
static void FETCH(f_i8)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = UBYTE_TO_FLOAT( src[0] );
}
/* MESA_FORMAT_I16 ***********************************************************/
/* Fetch texel from 1D, 2D or 3D i16 texture, return 4 GLchans */
static void FETCH(f_i16)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = USHORT_TO_FLOAT( src[0] );
}
/* MESA_FORMAT_RGBA_INT8 **************************************************/
static void
FETCH(rgba_int8)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLbyte *src = TEXEL_ADDR(GLbyte, texImage, i, j, k, 4);
texel[RCOMP] = (GLfloat) src[0];
texel[GCOMP] = (GLfloat) src[1];
texel[BCOMP] = (GLfloat) src[2];
texel[ACOMP] = (GLfloat) src[3];
}
/* MESA_FORMAT_RGBA_INT16 **************************************************/
static void
FETCH(rgba_int16)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLshort *src = TEXEL_ADDR(GLshort, texImage, i, j, k, 4);
texel[RCOMP] = (GLfloat) src[0];
texel[GCOMP] = (GLfloat) src[1];
texel[BCOMP] = (GLfloat) src[2];
texel[ACOMP] = (GLfloat) src[3];
}
/* MESA_FORMAT_RGBA_INT32 **************************************************/
static void
FETCH(rgba_int32)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLint *src = TEXEL_ADDR(GLint, texImage, i, j, k, 4);
texel[RCOMP] = (GLfloat) src[0];
texel[GCOMP] = (GLfloat) src[1];
texel[BCOMP] = (GLfloat) src[2];
texel[ACOMP] = (GLfloat) src[3];
}
/* MESA_FORMAT_RGBA_UINT8 **************************************************/
static void
FETCH(rgba_uint8)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 4);
texel[RCOMP] = (GLfloat) src[0];
texel[GCOMP] = (GLfloat) src[1];
texel[BCOMP] = (GLfloat) src[2];
texel[ACOMP] = (GLfloat) src[3];
}
/* MESA_FORMAT_RGBA_UINT16 **************************************************/
static void
FETCH(rgba_uint16)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 4);
texel[RCOMP] = (GLfloat) src[0];
texel[GCOMP] = (GLfloat) src[1];
texel[BCOMP] = (GLfloat) src[2];
texel[ACOMP] = (GLfloat) src[3];
}
/* MESA_FORMAT_RGBA_UINT32 **************************************************/
static void
FETCH(rgba_uint32)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 4);
texel[RCOMP] = (GLfloat) src[0];
texel[GCOMP] = (GLfloat) src[1];
texel[BCOMP] = (GLfloat) src[2];
texel[ACOMP] = (GLfloat) src[3];
}
/* MESA_FORMAT_SIGNED_RGBA_16 ***********************************************/
static void
FETCH(signed_rgba_16)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
const GLshort *s = TEXEL_ADDR(GLshort, texImage, i, j, k, 4);
texel[RCOMP] = SHORT_TO_FLOAT_TEX( s[0] );
texel[GCOMP] = SHORT_TO_FLOAT_TEX( s[1] );
texel[BCOMP] = SHORT_TO_FLOAT_TEX( s[2] );
texel[ACOMP] = SHORT_TO_FLOAT_TEX( s[3] );
}
/* MESA_FORMAT_RGBA_16 ***********************************************/
static void
FETCH(rgba_16)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
const GLushort *s = TEXEL_ADDR(GLushort, texImage, i, j, k, 4);
texel[RCOMP] = USHORT_TO_FLOAT( s[0] );
texel[GCOMP] = USHORT_TO_FLOAT( s[1] );
texel[BCOMP] = USHORT_TO_FLOAT( s[2] );
texel[ACOMP] = USHORT_TO_FLOAT( s[3] );
}
/* MESA_FORMAT_YCBCR *********************************************************/
/* Fetch texel from 1D, 2D or 3D ycbcr texture, return 4 GLfloats.
* We convert YCbCr to RGB here.
*/
static void FETCH(f_ycbcr)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src0 = TEXEL_ADDR(GLushort, texImage, (i & ~1), j, k, 1); /* even */
const GLushort *src1 = src0 + 1; /* odd */
const GLubyte y0 = (*src0 >> 8) & 0xff; /* luminance */
const GLubyte cb = *src0 & 0xff; /* chroma U */
const GLubyte y1 = (*src1 >> 8) & 0xff; /* luminance */
const GLubyte cr = *src1 & 0xff; /* chroma V */
const GLubyte y = (i & 1) ? y1 : y0; /* choose even/odd luminance */
GLfloat r = 1.164F * (y - 16) + 1.596F * (cr - 128);
GLfloat g = 1.164F * (y - 16) - 0.813F * (cr - 128) - 0.391F * (cb - 128);
GLfloat b = 1.164F * (y - 16) + 2.018F * (cb - 128);
r *= (1.0F / 255.0F);
g *= (1.0F / 255.0F);
b *= (1.0F / 255.0F);
texel[RCOMP] = CLAMP(r, 0.0F, 1.0F);
texel[GCOMP] = CLAMP(g, 0.0F, 1.0F);
texel[BCOMP] = CLAMP(b, 0.0F, 1.0F);
texel[ACOMP] = 1.0F;
}
/* MESA_FORMAT_YCBCR_REV *****************************************************/
/* Fetch texel from 1D, 2D or 3D ycbcr_rev texture, return 4 GLfloats.
* We convert YCbCr to RGB here.
*/
static void FETCH(f_ycbcr_rev)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLushort *src0 = TEXEL_ADDR(GLushort, texImage, (i & ~1), j, k, 1); /* even */
const GLushort *src1 = src0 + 1; /* odd */
const GLubyte y0 = *src0 & 0xff; /* luminance */
const GLubyte cr = (*src0 >> 8) & 0xff; /* chroma V */
const GLubyte y1 = *src1 & 0xff; /* luminance */
const GLubyte cb = (*src1 >> 8) & 0xff; /* chroma U */
const GLubyte y = (i & 1) ? y1 : y0; /* choose even/odd luminance */
GLfloat r = 1.164F * (y - 16) + 1.596F * (cr - 128);
GLfloat g = 1.164F * (y - 16) - 0.813F * (cr - 128) - 0.391F * (cb - 128);
GLfloat b = 1.164F * (y - 16) + 2.018F * (cb - 128);
r *= (1.0F / 255.0F);
g *= (1.0F / 255.0F);
b *= (1.0F / 255.0F);
texel[RCOMP] = CLAMP(r, 0.0F, 1.0F);
texel[GCOMP] = CLAMP(g, 0.0F, 1.0F);
texel[BCOMP] = CLAMP(b, 0.0F, 1.0F);
texel[ACOMP] = 1.0F;
}
/* MESA_TEXFORMAT_Z24_S8 ***************************************************/
static void FETCH(f_z24_s8)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
/* only return Z, not stencil data */
const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
texel[0] = ((*src) >> 8) * scale;
ASSERT(texImage->Base.TexFormat == MESA_FORMAT_Z24_S8 ||
texImage->Base.TexFormat == MESA_FORMAT_Z24_X8);
ASSERT(texel[0] >= 0.0F);
ASSERT(texel[0] <= 1.0F);
}
/* MESA_TEXFORMAT_S8_Z24 ***************************************************/
static void FETCH(f_s8_z24)( const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
/* only return Z, not stencil data */
const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
texel[0] = ((*src) & 0x00ffffff) * scale;
ASSERT(texImage->Base.TexFormat == MESA_FORMAT_S8_Z24 ||
texImage->Base.TexFormat == MESA_FORMAT_X8_Z24);
ASSERT(texel[0] >= 0.0F);
ASSERT(texel[0] <= 1.0F);
}
#undef TEXEL_ADDR
#undef DIM
#undef FETCH
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