/*
* Mesa 3-D graphics library
* Version: 6.5
*
* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
*
* 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 texformat_tmp.h
* Texel fetch functions template.
*
* This template file is used by texformat.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.
*
* \sa texformat.c and FetchTexel.
*
* \author Gareth Hughes
* \author Brian Paul
*/
#if DIM == 1
#define TEXEL_ADDR( type, image, i, j, k, size ) \
((void) (j), (void) (k), ((type *)(image)->Data + (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)->Data + ((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)->Data + (((image)->Height * (k) + (j)) * \
(image)->RowStride + (i)) * (size))
#define FETCH(x) fetch_texel_3d_##x
#else
#error illegal number of texture dimensions
#endif
/* MESA_FORMAT_RGBA **********************************************************/
/* Fetch texel from 1D, 2D or 3D RGBA texture, returning 4 GLchans */
static void FETCH(rgba)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 4);
COPY_CHAN4( texel, src );
}
/* Fetch texel from 1D, 2D or 3D RGBA texture, returning 4 GLfloats */
static void FETCH(f_rgba)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 4);
texel[RCOMP] = CHAN_TO_FLOAT(src[0]);
texel[GCOMP] = CHAN_TO_FLOAT(src[1]);
texel[BCOMP] = CHAN_TO_FLOAT(src[2]);
texel[ACOMP] = CHAN_TO_FLOAT(src[3]);
}
#if DIM == 3
/* Store a GLchan RGBA texel */
static void store_texel_rgba(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLchan *rgba = (const GLchan *) texel;
GLchan *dst = TEXEL_ADDR(GLchan, texImage, i, j, k, 4);
dst[0] = rgba[RCOMP];
dst[1] = rgba[GCOMP];
dst[2] = rgba[BCOMP];
dst[3] = rgba[ACOMP];
}
#endif
/* MESA_FORMAT_RGB ***********************************************************/
/* Fetch texel from 1D, 2D or 3D RGB texture, returning 4 GLchans */
static void FETCH(rgb)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 3);
texel[RCOMP] = src[0];
texel[GCOMP] = src[1];
texel[BCOMP] = src[2];
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D RGB texture, returning 4 GLfloats */
static void FETCH(f_rgb)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 3);
texel[RCOMP] = CHAN_TO_FLOAT(src[0]);
texel[GCOMP] = CHAN_TO_FLOAT(src[1]);
texel[BCOMP] = CHAN_TO_FLOAT(src[2]);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_rgb(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLchan *rgba = (const GLchan *) texel;
GLchan *dst = TEXEL_ADDR(GLchan, texImage, i, j, k, 3);
dst[0] = rgba[RCOMP];
dst[1] = rgba[GCOMP];
dst[2] = rgba[BCOMP];
}
#endif
/* MESA_FORMAT_ALPHA *********************************************************/
/* Fetch texel from 1D, 2D or 3D ALPHA texture, returning 4 GLchans */
static void FETCH(alpha)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0;
texel[ACOMP] = src[0];
}
/* Fetch texel from 1D, 2D or 3D ALPHA texture, returning 4 GLfloats */
static void FETCH(f_alpha)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0.0;
texel[ACOMP] = CHAN_TO_FLOAT(src[0]);
}
#if DIM == 3
static void store_texel_alpha(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLchan *rgba = (const GLchan *) texel;
GLchan *dst = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
dst[0] = rgba[ACOMP];
}
#endif
/* MESA_FORMAT_LUMINANCE *****************************************************/
/* Fetch texel from 1D, 2D or 3D LUMIN texture, returning 4 GLchans */
static void FETCH(luminance)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = src[0];
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D LUMIN texture, returning 4 GLfloats */
static void FETCH(f_luminance)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = CHAN_TO_FLOAT(src[0]);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_luminance(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLchan *rgba = (const GLchan *) texel;
GLchan *dst = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
dst[0] = rgba[RCOMP];
}
#endif
/* MESA_FORMAT_LUMINANCE_ALPHA ***********************************************/
/* Fetch texel from 1D, 2D or 3D L_A texture, returning 4 GLchans */
static void FETCH(luminance_alpha)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 2);
texel[RCOMP] = src[0];
texel[GCOMP] = src[0];
texel[BCOMP] = src[0];
texel[ACOMP] = src[1];
}
/* Fetch texel from 1D, 2D or 3D L_A texture, returning 4 GLfloats */
static void FETCH(f_luminance_alpha)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 2);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = CHAN_TO_FLOAT(src[0]);
texel[ACOMP] = CHAN_TO_FLOAT(src[1]);
}
#if DIM == 3
static void store_texel_luminance_alpha(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLchan *rgba = (const GLchan *) texel;
GLchan *dst = TEXEL_ADDR(GLchan, texImage, i, j, k, 2);
dst[0] = rgba[RCOMP];
dst[1] = rgba[ACOMP];
}
#endif
/* MESA_FORMAT_INTENSITY *****************************************************/
/* Fetch texel from 1D, 2D or 3D INT. texture, returning 4 GLchans */
static void FETCH(intensity)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
texel[RCOMP] = src[0];
texel[GCOMP] = src[0];
texel[BCOMP] = src[0];
texel[ACOMP] = src[0];
}
/* Fetch texel from 1D, 2D or 3D INT. texture, returning 4 GLfloats */
static void FETCH(f_intensity)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLchan *src = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = CHAN_TO_FLOAT(src[0]);
}
#if DIM == 3
static void store_texel_intensity(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLchan *rgba = (const GLchan *) texel;
GLchan *dst = TEXEL_ADDR(GLchan, texImage, i, j, k, 1);
dst[0] = rgba[RCOMP];
}
#endif
/* MESA_FORMAT_DEPTH_COMPONENT_F32 *******************************************/
/* Fetch depth texel from 1D, 2D or 3D float32 DEPTH texture,
* returning 1 GLfloat.
* Note: no GLchan version of this function.
*/
static void FETCH(f_depth_component_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
texel[0] = src[0];
}
#if DIM == 3
static void store_texel_depth_component_f32(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *depth = (const GLfloat *) texel;
GLfloat *dst = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
dst[0] = *depth;
}
#endif
/* MESA_FORMAT_DEPTH_COMPONENT16 *********************************************/
/* Fetch depth texel from 1D, 2D or 3D float32 DEPTH texture,
* returning 1 GLfloat.
* Note: no GLchan version of this function.
*/
static void FETCH(f_depth_component16)(const struct gl_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);
}
#if DIM == 3
static void store_texel_depth_component16(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLushort *depth = (const GLushort *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
dst[0] = *depth;
}
#endif
/* MESA_FORMAT_RGBA_F32 ******************************************************/
/* Fetch texel from 1D, 2D or 3D RGBA_FLOAT32 texture, returning 4 GLchans.
*/
static void FETCH(rgba_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 4);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], src[0]);
UNCLAMPED_FLOAT_TO_CHAN(texel[GCOMP], src[1]);
UNCLAMPED_FLOAT_TO_CHAN(texel[BCOMP], src[2]);
UNCLAMPED_FLOAT_TO_CHAN(texel[ACOMP], src[3]);
}
/* Fetch texel from 1D, 2D or 3D RGBA_FLOAT32 texture, returning 4 GLfloats.
*/
static void FETCH(f_rgba_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 4);
texel[RCOMP] = src[0];
texel[GCOMP] = src[1];
texel[BCOMP] = src[2];
texel[ACOMP] = src[3];
}
#if DIM == 3
static void store_texel_rgba_f32(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *depth = (const GLfloat *) texel;
GLfloat *dst = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
dst[0] = depth[RCOMP];
dst[1] = depth[GCOMP];
dst[2] = depth[BCOMP];
dst[3] = depth[ACOMP];
}
#endif
/* MESA_FORMAT_RGBA_F16 ******************************************************/
/* Fetch texel from 1D, 2D or 3D RGBA_FLOAT16 texture,
* returning 4 GLchans.
*/
static void FETCH(rgba_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 4);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], _mesa_half_to_float(src[0]));
UNCLAMPED_FLOAT_TO_CHAN(texel[GCOMP], _mesa_half_to_float(src[1]));
UNCLAMPED_FLOAT_TO_CHAN(texel[BCOMP], _mesa_half_to_float(src[2]));
UNCLAMPED_FLOAT_TO_CHAN(texel[ACOMP], _mesa_half_to_float(src[3]));
}
/* Fetch texel from 1D, 2D or 3D RGBA_FLOAT16 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_rgba_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 4);
texel[RCOMP] = _mesa_half_to_float(src[0]);
texel[GCOMP] = _mesa_half_to_float(src[1]);
texel[BCOMP] = _mesa_half_to_float(src[2]);
texel[ACOMP] = _mesa_half_to_float(src[3]);
}
#if DIM == 3
static void store_texel_rgba_f16(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *depth = (const GLfloat *) texel;
GLhalfARB *dst = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
dst[0] = _mesa_float_to_half(*depth);
}
#endif
/* MESA_FORMAT_RGB_F32 *******************************************************/
/* Fetch texel from 1D, 2D or 3D RGB_FLOAT32 texture,
* returning 4 GLchans.
*/
static void FETCH(rgb_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 3);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], src[0]);
UNCLAMPED_FLOAT_TO_CHAN(texel[GCOMP], src[1]);
UNCLAMPED_FLOAT_TO_CHAN(texel[BCOMP], src[2]);
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D RGB_FLOAT32 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_rgb_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 3);
texel[RCOMP] = src[0];
texel[GCOMP] = src[1];
texel[BCOMP] = src[2];
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_rgb_f32(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *depth = (const GLfloat *) texel;
GLfloat *dst = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
dst[0] = *depth;
}
#endif
/* MESA_FORAMT_RGB_F16 *******************************************************/
/* Fetch texel from 1D, 2D or 3D RGBA_FLOAT16 texture,
* returning 4 GLchans.
*/
static void FETCH(rgb_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 3);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], _mesa_half_to_float(src[0]));
UNCLAMPED_FLOAT_TO_CHAN(texel[GCOMP], _mesa_half_to_float(src[1]));
UNCLAMPED_FLOAT_TO_CHAN(texel[BCOMP], _mesa_half_to_float(src[2]));
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D RGB_FLOAT16 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_rgb_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 3);
texel[RCOMP] = _mesa_half_to_float(src[0]);
texel[GCOMP] = _mesa_half_to_float(src[1]);
texel[BCOMP] = _mesa_half_to_float(src[2]);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_rgb_f16(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *depth = (const GLfloat *) texel;
GLhalfARB *dst = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
dst[0] = _mesa_float_to_half(*depth);
}
#endif
/* MESA_FORMAT_ALPHA_F32 *****************************************************/
/* Fetch texel from 1D, 2D or 3D ALPHA_FLOAT32 texture,
* returning 4 GLchans.
*/
static void FETCH(alpha_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0;
UNCLAMPED_FLOAT_TO_CHAN(texel[ACOMP], src[0]);
}
/* Fetch texel from 1D, 2D or 3D ALPHA_FLOAT32 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_alpha_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0.0F;
texel[ACOMP] = src[0];
}
#if DIM == 3
static void store_texel_alpha_f32(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *rgba = (const GLfloat *) texel;
GLfloat *dst = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
dst[0] = rgba[ACOMP];
}
#endif
/* MESA_FORMAT_ALPHA_F32 *****************************************************/
/* Fetch texel from 1D, 2D or 3D ALPHA_FLOAT16 texture,
* returning 4 GLchans.
*/
static void FETCH(alpha_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0;
UNCLAMPED_FLOAT_TO_CHAN(texel[ACOMP], _mesa_half_to_float(src[0]));
}
/* Fetch texel from 1D, 2D or 3D ALPHA_FLOAT16 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_alpha_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0.0F;
texel[ACOMP] = _mesa_half_to_float(src[0]);
}
#if DIM == 3
static void store_texel_alpha_f16(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *rgba = (const GLfloat *) texel;
GLhalfARB *dst = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
dst[0] = _mesa_float_to_half(rgba[ACOMP]);
}
#endif
/* MESA_FORMAT_LUMINANCE_F32 *************************************************/
/* Fetch texel from 1D, 2D or 3D LUMINANCE_FLOAT32 texture,
* returning 4 GLchans.
*/
static void FETCH(luminance_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], src[0]);
texel[GCOMP] =
texel[BCOMP] = texel[RCOMP];
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D LUMINANCE_FLOAT32 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_luminance_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = src[0];
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_luminance_f32(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *rgba = (const GLfloat *) texel;
GLfloat *dst = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
dst[0] = rgba[RCOMP];
}
#endif
/* MESA_FORMAT_LUMINANCE_F16 *************************************************/
/* Fetch texel from 1D, 2D or 3D LUMINANCE_FLOAT16 texture,
* returning 4 GLchans.
*/
static void FETCH(luminance_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], _mesa_half_to_float(src[0]));
texel[GCOMP] =
texel[BCOMP] = texel[RCOMP];
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D LUMINANCE_FLOAT16 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_luminance_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = _mesa_half_to_float(src[0]);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_luminance_f16(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *rgba = (const GLfloat *) texel;
GLhalfARB *dst = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
dst[0] = _mesa_float_to_half(rgba[RCOMP]);
}
#endif
/* MESA_FORMAT_LUMINANCE_ALPHA_F32 *******************************************/
/* Fetch texel from 1D, 2D or 3D LUMINANCE_ALPHA_FLOAT32 texture,
* returning 4 GLchans.
*/
static void FETCH(luminance_alpha_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 2);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], src[0]);
texel[GCOMP] =
texel[BCOMP] = texel[RCOMP];
UNCLAMPED_FLOAT_TO_CHAN(texel[ACOMP], src[1]);
}
/* Fetch texel from 1D, 2D or 3D LUMINANCE_ALPHA_FLOAT32 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_luminance_alpha_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 2);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = src[0];
texel[ACOMP] = src[1];
}
#if DIM == 3
static void store_texel_luminance_alpha_f32(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *rgba = (const GLfloat *) texel;
GLfloat *dst = TEXEL_ADDR(GLfloat, texImage, i, j, k, 2);
dst[0] = rgba[RCOMP];
dst[1] = rgba[ACOMP];
}
#endif
/* MESA_FORMAT_LUMINANCE_ALPHA_F16 *******************************************/
/* Fetch texel from 1D, 2D or 3D LUMINANCE_ALPHA_FLOAT16 texture,
* returning 4 GLfloats.
*/
static void FETCH(luminance_alpha_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 2);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], _mesa_half_to_float(src[0]));
texel[GCOMP] =
texel[BCOMP] = texel[RCOMP];
UNCLAMPED_FLOAT_TO_CHAN(texel[ACOMP], _mesa_half_to_float(src[1]));
}
/* Fetch texel from 1D, 2D or 3D LUMINANCE_ALPHA_FLOAT16 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_luminance_alpha_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 2);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = _mesa_half_to_float(src[0]);
texel[ACOMP] = _mesa_half_to_float(src[1]);
}
#if DIM == 3
static void store_texel_luminance_alpha_f16(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *rgba = (const GLfloat *) texel;
GLhalfARB *dst = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 2);
dst[0] = _mesa_float_to_half(rgba[RCOMP]);
dst[1] = _mesa_float_to_half(rgba[ACOMP]);
}
#endif
/* MESA_FORMAT_INTENSITY_F32 *************************************************/
/* Fetch texel from 1D, 2D or 3D INTENSITY_FLOAT32 texture,
* returning 4 GLchans.
*/
static void FETCH(intensity_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], src[0]);
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = texel[RCOMP];
}
/* Fetch texel from 1D, 2D or 3D INTENSITY_FLOAT32 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_intensity_f32)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = src[0];
}
#if DIM == 3
static void store_texel_intensity_f32(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *rgba = (const GLfloat *) texel;
GLfloat *dst = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
dst[0] = rgba[RCOMP];
}
#endif
/* MESA_FORMAT_INTENSITY_F16 *************************************************/
/* Fetch texel from 1D, 2D or 3D INTENSITY_FLOAT16 texture,
* returning 4 GLchans.
*/
static void FETCH(intensity_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
UNCLAMPED_FLOAT_TO_CHAN(texel[RCOMP], _mesa_half_to_float(src[0]));
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = texel[RCOMP];
}
/* Fetch texel from 1D, 2D or 3D INTENSITY_FLOAT16 texture,
* returning 4 GLfloats.
*/
static void FETCH(f_intensity_f16)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = _mesa_half_to_float(src[0]);
}
#if DIM == 3
static void store_texel_intensity_f16(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLfloat *rgba = (const GLfloat *) texel;
GLhalfARB *dst = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
dst[0] = _mesa_float_to_half(rgba[RCOMP]);
}
#endif
/*
* Begin Hardware formats
*/
/* MESA_FORMAT_RGBA8888 ******************************************************/
/* Fetch texel from 1D, 2D or 3D rgba8888 texture, return 4 GLchans */
static void FETCH(rgba8888)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_CHAN( (s >> 24) );
texel[GCOMP] = UBYTE_TO_CHAN( (s >> 16) & 0xff );
texel[BCOMP] = UBYTE_TO_CHAN( (s >> 8) & 0xff );
texel[ACOMP] = UBYTE_TO_CHAN( (s ) & 0xff );
}
/* Fetch texel from 1D, 2D or 3D rgba8888 texture, return 4 GLfloats */
static void FETCH(f_rgba8888)( const struct gl_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 );
}
#if DIM == 3
static void store_texel_rgba8888(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLuint *dst = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
*dst = PACK_COLOR_8888(rgba[RCOMP], rgba[GCOMP], rgba[BCOMP], rgba[ACOMP]);
}
#endif
/* MESA_FORMAT_RGBA888_REV ***************************************************/
/* Fetch texel from 1D, 2D or 3D abgr8888 texture, return 4 GLchans */
static void FETCH(rgba8888_rev)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_CHAN( (s ) & 0xff );
texel[GCOMP] = UBYTE_TO_CHAN( (s >> 8) & 0xff );
texel[BCOMP] = UBYTE_TO_CHAN( (s >> 16) & 0xff );
texel[ACOMP] = UBYTE_TO_CHAN( (s >> 24) );
}
/* Fetch texel from 1D, 2D or 3D abgr8888 texture, return 4 GLfloats */
static void FETCH(f_rgba8888_rev)( const struct gl_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) );
}
#if DIM == 3
static void store_texel_rgba8888_rev(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLuint *dst = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
*dst = PACK_COLOR_8888_REV(rgba[RCOMP], rgba[GCOMP], rgba[BCOMP], rgba[ACOMP]);
}
#endif
/* MESA_FORMAT_ARGB8888 ******************************************************/
/* Fetch texel from 1D, 2D or 3D argb8888 texture, return 4 GLchans */
static void FETCH(argb8888)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_CHAN( (s >> 16) & 0xff );
texel[GCOMP] = UBYTE_TO_CHAN( (s >> 8) & 0xff );
texel[BCOMP] = UBYTE_TO_CHAN( (s ) & 0xff );
texel[ACOMP] = UBYTE_TO_CHAN( (s >> 24) );
}
/* Fetch texel from 1D, 2D or 3D argb8888 texture, return 4 GLfloats */
static void FETCH(f_argb8888)( const struct gl_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) );
}
#if DIM == 3
static void store_texel_argb8888(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLuint *dst = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
*dst = PACK_COLOR_8888(rgba[ACOMP], rgba[RCOMP], rgba[GCOMP], rgba[BCOMP]);
}
#endif
/* MESA_FORMAT_ARGB8888_REV **************************************************/
/* Fetch texel from 1D, 2D or 3D argb8888_rev texture, return 4 GLchans */
static void FETCH(argb8888_rev)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_CHAN( (s >> 8) & 0xff );
texel[GCOMP] = UBYTE_TO_CHAN( (s >> 16) & 0xff );
texel[BCOMP] = UBYTE_TO_CHAN( (s >> 24) );
texel[ACOMP] = UBYTE_TO_CHAN( (s ) & 0xff );
}
/* Fetch texel from 1D, 2D or 3D argb8888_rev texture, return 4 GLfloats */
static void FETCH(f_argb8888_rev)( const struct gl_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 );
}
#if DIM == 3
static void store_texel_argb8888_rev(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLuint *dst = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
*dst = PACK_COLOR_8888(rgba[ACOMP], rgba[RCOMP], rgba[GCOMP], rgba[BCOMP]);
}
#endif
/* MESA_FORMAT_RGB888 ********************************************************/
/* Fetch texel from 1D, 2D or 3D rgb888 texture, return 4 GLchans */
static void FETCH(rgb888)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
texel[RCOMP] = UBYTE_TO_CHAN( src[2] );
texel[GCOMP] = UBYTE_TO_CHAN( src[1] );
texel[BCOMP] = UBYTE_TO_CHAN( src[0] );
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D rgb888 texture, return 4 GLfloats */
static void FETCH(f_rgb888)( const struct gl_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;
}
#if DIM == 3
static void store_texel_rgb888(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
dst[0] = rgba[RCOMP];
dst[1] = rgba[GCOMP];
dst[2] = rgba[BCOMP];
}
#endif
/* MESA_FORMAT_BGR888 ********************************************************/
/* Fetch texel from 1D, 2D or 3D bgr888 texture, return 4 GLchans */
static void FETCH(bgr888)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
texel[RCOMP] = UBYTE_TO_CHAN( src[0] );
texel[GCOMP] = UBYTE_TO_CHAN( src[1] );
texel[BCOMP] = UBYTE_TO_CHAN( src[2] );
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D bgr888 texture, return 4 GLfloats */
static void FETCH(f_bgr888)( const struct gl_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;
}
#if DIM == 3
static void store_texel_bgr888(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
dst[0] = rgba[BCOMP];
dst[1] = rgba[GCOMP];
dst[2] = rgba[RCOMP];
}
#endif
/* 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(rgb565)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = *src;
texel[RCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf8) | ((s >> 13) & 0x7) );
texel[GCOMP] = UBYTE_TO_CHAN( ((s >> 3) & 0xfc) | ((s >> 9) & 0x3) );
texel[BCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xf8) | ((s >> 2) & 0x7) );
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D rgb565 texture, return 4 GLfloats */
static void FETCH(f_rgb565)( const struct gl_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) & 0xf8) * (1.0F / 248.0F);
texel[GCOMP] = ((s >> 3) & 0xfc) * (1.0F / 252.0F);
texel[BCOMP] = ((s << 3) & 0xf8) * (1.0F / 248.0F);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_rgb565(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
*dst = PACK_COLOR_565(rgba[RCOMP], rgba[GCOMP], rgba[BCOMP]);
}
#endif
/* MESA_FORMAT_RGB565_REV ****************************************************/
/* Fetch texel from 1D, 2D or 3D rgb565_rev texture, return 4 GLchans */
static void FETCH(rgb565_rev)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *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_CHAN( ((s >> 8) & 0xf8) | ((s >> 13) & 0x7) );
texel[GCOMP] = UBYTE_TO_CHAN( ((s >> 3) & 0xfc) | ((s >> 9) & 0x3) );
texel[BCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xf8) | ((s >> 2) & 0x7) );
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D rgb565_rev texture, return 4 GLfloats */
static void FETCH(f_rgb565_rev)( const struct gl_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] = ((s >> 8) & 0xf8) * (1.0F / 248.0F);
texel[GCOMP] = ((s >> 3) & 0xfc) * (1.0F / 252.0F);
texel[BCOMP] = ((s << 3) & 0xf8) * (1.0F / 248.0F);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_rgb565_rev(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
*dst = PACK_COLOR_565(rgba[BCOMP], rgba[GCOMP], rgba[RCOMP]);
}
#endif
/* MESA_FORMAT_ARGB4444 ******************************************************/
/* Fetch texel from 1D, 2D or 3D argb444 texture, return 4 GLchans */
static void FETCH(argb4444)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = *src;
texel[RCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf) | ((s >> 4) & 0xf0) );
texel[GCOMP] = UBYTE_TO_CHAN( ((s >> 4) & 0xf) | ((s ) & 0xf0) );
texel[BCOMP] = UBYTE_TO_CHAN( ((s ) & 0xf) | ((s << 4) & 0xf0) );
texel[ACOMP] = UBYTE_TO_CHAN( ((s >> 12) & 0xf) | ((s >> 8) & 0xf0) );
}
/* Fetch texel from 1D, 2D or 3D argb4444 texture, return 4 GLfloats */
static void FETCH(f_argb4444)( const struct gl_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);
}
#if DIM == 3
static void store_texel_argb4444(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
*dst = PACK_COLOR_4444(rgba[RCOMP], rgba[GCOMP], rgba[BCOMP], rgba[ACOMP]);
}
#endif
/* MESA_FORMAT_ARGB4444_REV **************************************************/
/* Fetch texel from 1D, 2D or 3D argb4444_rev texture, return 4 GLchans */
static void FETCH(argb4444_rev)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] = UBYTE_TO_CHAN( ((s ) & 0xf) | ((s << 4) & 0xf0) );
texel[GCOMP] = UBYTE_TO_CHAN( ((s >> 12) & 0xf) | ((s >> 8) & 0xf0) );
texel[BCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf) | ((s >> 4) & 0xf0) );
texel[ACOMP] = UBYTE_TO_CHAN( ((s >> 4) & 0xf) | ((s ) & 0xf0) );
}
/* Fetch texel from 1D, 2D or 3D argb4444_rev texture, return 4 GLfloats */
static void FETCH(f_argb4444_rev)( const struct gl_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);
}
#if DIM == 3
static void store_texel_argb4444_rev(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
*dst = PACK_COLOR_4444(rgba[ACOMP], rgba[BCOMP], rgba[GCOMP], rgba[RCOMP]);
}
#endif
/* MESA_FORMAT_ARGB1555 ******************************************************/
/* Fetch texel from 1D, 2D or 3D argb1555 texture, return 4 GLchans */
static void FETCH(argb1555)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = *src;
texel[RCOMP] = UBYTE_TO_CHAN( ((s >> 7) & 0xf8) | ((s >> 12) & 0x7) );
texel[GCOMP] = UBYTE_TO_CHAN( ((s >> 2) & 0xf8) | ((s >> 7) & 0x7) );
texel[BCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xf8) | ((s >> 2) & 0x7) );
texel[ACOMP] = UBYTE_TO_CHAN( ((s >> 15) & 0x01) * 255 );
}
/* Fetch texel from 1D, 2D or 3D argb1555 texture, return 4 GLfloats */
static void FETCH(f_argb1555)( const struct gl_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 ) & 0x1f) * (1.0F / 31.0F);
texel[ACOMP] = ((s >> 15) & 0x01);
}
#if DIM == 3
static void store_texel_argb1555(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
*dst = PACK_COLOR_1555(rgba[ACOMP], rgba[RCOMP], rgba[GCOMP], rgba[BCOMP]);
}
#endif
/* MESA_FORMAT_ARGB1555_REV **************************************************/
/* Fetch texel from 1D, 2D or 3D argb1555_rev texture, return 4 GLchans */
static void FETCH(argb1555_rev)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
const GLushort s = (*src << 8) | (*src >> 8); /* byteswap */
texel[RCOMP] = UBYTE_TO_CHAN( ((s >> 7) & 0xf8) | ((s >> 12) & 0x7) );
texel[GCOMP] = UBYTE_TO_CHAN( ((s >> 2) & 0xf8) | ((s >> 7) & 0x7) );
texel[BCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xf8) | ((s >> 2) & 0x7) );
texel[ACOMP] = UBYTE_TO_CHAN( ((s >> 15) & 0x01) * 255 );
}
/* Fetch texel from 1D, 2D or 3D argb1555_rev texture, return 4 GLfloats */
static void FETCH(f_argb1555_rev)( const struct gl_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] = ((s >> 10) & 0x1f) * (1.0F / 31.0F);
texel[GCOMP] = ((s >> 5) & 0x1f) * (1.0F / 31.0F);
texel[BCOMP] = ((s ) & 0x1f) * (1.0F / 31.0F);
texel[ACOMP] = ((s >> 15) & 0x01);
}
#if DIM == 3
static void store_texel_argb1555_rev(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
*dst = PACK_COLOR_1555_REV(rgba[ACOMP], rgba[RCOMP], rgba[GCOMP], rgba[BCOMP]);
}
#endif
/* MESA_FORMAT_AL88 **********************************************************/
/* Fetch texel from 1D, 2D or 3D al88 texture, return 4 GLchans */
static void FETCH(al88)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = UBYTE_TO_CHAN( s & 0xff );
texel[ACOMP] = UBYTE_TO_CHAN( s >> 8 );
}
/* Fetch texel from 1D, 2D or 3D al88 texture, return 4 GLfloats */
static void FETCH(f_al88)( const struct gl_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 );
}
#if DIM == 3
static void store_texel_al88(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
*dst = PACK_COLOR_88(rgba[ACOMP], rgba[RCOMP]);
}
#endif
/* MESA_FORMAT_AL88_REV ******************************************************/
/* Fetch texel from 1D, 2D or 3D al88_rev texture, return 4 GLchans */
static void FETCH(al88_rev)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = UBYTE_TO_CHAN( s >> 8 );
texel[ACOMP] = UBYTE_TO_CHAN( s & 0xff );
}
/* Fetch texel from 1D, 2D or 3D al88_rev texture, return 4 GLfloats */
static void FETCH(f_al88_rev)( const struct gl_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 );
}
#if DIM == 3
static void store_texel_al88_rev(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
*dst = PACK_COLOR_88(rgba[RCOMP], rgba[ACOMP]);
}
#endif
/* MESA_FORMAT_RGB332 ********************************************************/
/* Fetch texel from 1D, 2D or 3D rgb332 texture, return 4 GLchans */
static void FETCH(rgb332)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
static const GLubyte lut2to8[4] = {0, 85, 170, 255};
static const GLubyte lut3to8[8] = {0, 36, 73, 109, 146, 182, 219, 255};
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
const GLubyte s = *src;
texel[RCOMP] = UBYTE_TO_CHAN( lut3to8[(s >> 5) & 0x7] );
texel[GCOMP] = UBYTE_TO_CHAN( lut3to8[(s >> 2) & 0x7] );
texel[BCOMP] = UBYTE_TO_CHAN( lut2to8[(s ) & 0x3] );
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D rgb332 texture, return 4 GLfloats */
static void FETCH(f_rgb332)( const struct gl_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 ) & 0xe0) * (1.0F / 224.0F);
texel[GCOMP] = ((s << 3) & 0xe0) * (1.0F / 224.0F);
texel[BCOMP] = ((s << 6) & 0xc0) * (1.0F / 192.0F);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_rgb332(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
*dst = PACK_COLOR_332(rgba[RCOMP], rgba[GCOMP], rgba[BCOMP]);
}
#endif
/* MESA_FORMAT_A8 ************************************************************/
/* Fetch texel from 1D, 2D or 3D a8 texture, return 4 GLchans */
static void FETCH(a8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0;
texel[ACOMP] = UBYTE_TO_CHAN( src[0] );
}
/* Fetch texel from 1D, 2D or 3D a8 texture, return 4 GLfloats */
static void FETCH(f_a8)( const struct gl_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] = 0.0;
texel[ACOMP] = UBYTE_TO_FLOAT( src[0] );
}
#if DIM == 3
static void store_texel_a8(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
*dst = rgba[ACOMP];
}
#endif
/* MESA_FORMAT_L8 ************************************************************/
/* Fetch texel from 1D, 2D or 3D l8 texture, return 4 GLchans */
static void FETCH(l8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = UBYTE_TO_CHAN( src[0] );
texel[ACOMP] = CHAN_MAX;
}
/* Fetch texel from 1D, 2D or 3D l8 texture, return 4 GLfloats */
static void FETCH(f_l8)( const struct gl_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;
}
#if DIM == 3
static void store_texel_l8(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
*dst = rgba[RCOMP];
}
#endif
/* MESA_FORMAT_I8 ************************************************************/
/* Fetch texel from 1D, 2D or 3D i8 texture, return 4 GLchans */
static void FETCH(i8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = UBYTE_TO_CHAN( src[0] );
}
/* Fetch texel from 1D, 2D or 3D i8 texture, return 4 GLfloats */
static void FETCH(f_i8)( const struct gl_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] );
}
#if DIM == 3
static void store_texel_i8(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
*dst = rgba[RCOMP];
}
#endif
/* MESA_FORMAT_CI8 ***********************************************************/
/* Fetch CI texel from 1D, 2D or 3D ci8 texture, lookup the index in a
* color table, and return 4 GLchans.
*/
static void FETCH(ci8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
const struct gl_color_table *palette;
const GLchan *table;
GLuint index;
GET_CURRENT_CONTEXT(ctx);
if (ctx->Texture.SharedPalette) {
palette = &ctx->Texture.Palette;
}
else {
palette = &texImage->TexObject->Palette;
}
if (palette->Size == 0)
return; /* undefined results */
ASSERT(palette->Type != GL_FLOAT);
table = (const GLchan *) palette->Table;
/* Mask the index against size of palette to avoid going out of bounds */
index = (*src) & (palette->Size - 1);
switch (palette->Format) {
case GL_ALPHA:
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = 0;
texel[ACOMP] = table[index];
return;
case GL_LUMINANCE:
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = table[index];
texel[ACOMP] = CHAN_MAX;
break;
case GL_INTENSITY:
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] =
texel[ACOMP] = table[index];
return;
case GL_LUMINANCE_ALPHA:
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = table[index * 2 + 0];
texel[ACOMP] = table[index * 2 + 1];
return;
case GL_RGB:
texel[RCOMP] = table[index * 3 + 0];
texel[GCOMP] = table[index * 3 + 1];
texel[BCOMP] = table[index * 3 + 2];
texel[ACOMP] = CHAN_MAX;
return;
case GL_RGBA:
texel[RCOMP] = table[index * 4 + 0];
texel[GCOMP] = table[index * 4 + 1];
texel[BCOMP] = table[index * 4 + 2];
texel[ACOMP] = table[index * 4 + 3];
return;
default:
_mesa_problem(ctx, "Bad palette format in palette_sample");
}
}
/* Fetch CI texel from 1D, 2D or 3D ci8 texture, lookup the index in a
* color table, and return 4 GLfloats.
*/
static void FETCH(f_ci8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
GLchan rgba[4];
/* Sample as GLchan */
FETCH(ci8)(texImage, i, j, k, rgba);
/* and return as floats */
texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]);
texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]);
texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]);
texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]);
}
#if DIM == 3
static void store_texel_ci8(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *index = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
*dst = *index;
}
#endif
/* MESA_FORMAT_YCBCR *********************************************************/
/* Fetch texel from 1D, 2D or 3D ycbcr texture, return 4 GLchans */
/* We convert YCbCr to RGB here */
/* XXX this may break if GLchan != GLubyte */
static void FETCH(ycbcr)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *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 */
GLint r, g, b;
if (i & 1) {
/* odd pixel: use y1,cr,cb */
r = (GLint) (1.164 * (y1-16) + 1.596 * (cr-128));
g = (GLint) (1.164 * (y1-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
b = (GLint) (1.164 * (y1-16) + 2.018 * (cb-128));
}
else {
/* even pixel: use y0,cr,cb */
r = (GLint) (1.164 * (y0-16) + 1.596 * (cr-128));
g = (GLint) (1.164 * (y0-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
b = (GLint) (1.164 * (y0-16) + 2.018 * (cb-128));
}
texel[RCOMP] = CLAMP(r, 0, CHAN_MAX);
texel[GCOMP] = CLAMP(g, 0, CHAN_MAX);
texel[BCOMP] = CLAMP(b, 0, CHAN_MAX);
texel[ACOMP] = CHAN_MAX;
}
/* 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 gl_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 */
GLfloat r, g, b;
if (i & 1) {
/* odd pixel: use y1,cr,cb */
r = (1.164 * (y1-16) + 1.596 * (cr-128));
g = (1.164 * (y1-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
b = (1.164 * (y1-16) + 2.018 * (cb-128));
}
else {
/* even pixel: use y0,cr,cb */
r = (1.164 * (y0-16) + 1.596 * (cr-128));
g = (1.164 * (y0-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
b = (1.164 * (y0-16) + 2.018 * (cb-128));
}
/* XXX remove / 255 here by tweaking arithmetic above */
r /= 255.0;
g /= 255.0;
b /= 255.0;
/* XXX should we really clamp??? */
texel[RCOMP] = CLAMP(r, 0.0, 1.0);
texel[GCOMP] = CLAMP(g, 0.0, 1.0);
texel[BCOMP] = CLAMP(b, 0.0, 1.0);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_ycbcr(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
/* XXX to do */
}
#endif
/* MESA_FORMAT_YCBCR_REV *****************************************************/
/* Fetch texel from 1D, 2D or 3D ycbcr_rev texture, return 4 GLchans */
/* We convert YCbCr to RGB here */
/* XXX this may break if GLchan != GLubyte */
static void FETCH(ycbcr_rev)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *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 */
GLint r, g, b;
if (i & 1) {
/* odd pixel: use y1,cr,cb */
r = (GLint) (1.164 * (y1-16) + 1.596 * (cr-128));
g = (GLint) (1.164 * (y1-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
b = (GLint) (1.164 * (y1-16) + 2.018 * (cb-128));
}
else {
/* even pixel: use y0,cr,cb */
r = (GLint) (1.164 * (y0-16) + 1.596 * (cr-128));
g = (GLint) (1.164 * (y0-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
b = (GLint) (1.164 * (y0-16) + 2.018 * (cb-128));
}
texel[RCOMP] = CLAMP(r, 0, CHAN_MAX);
texel[GCOMP] = CLAMP(g, 0, CHAN_MAX);
texel[BCOMP] = CLAMP(b, 0, CHAN_MAX);
texel[ACOMP] = CHAN_MAX;
}
/* 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 gl_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 */
GLfloat r, g, b;
if (i & 1) {
/* odd pixel: use y1,cr,cb */
r = (1.164 * (y1-16) + 1.596 * (cr-128));
g = (1.164 * (y1-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
b = (1.164 * (y1-16) + 2.018 * (cb-128));
}
else {
/* even pixel: use y0,cr,cb */
r = (1.164 * (y0-16) + 1.596 * (cr-128));
g = (1.164 * (y0-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
b = (1.164 * (y0-16) + 2.018 * (cb-128));
}
/* XXX remove / 255 here by tweaking arithmetic above */
r /= 255.0;
g /= 255.0;
b /= 255.0;
/* XXX should we really clamp??? */
texel[RCOMP] = CLAMP(r, 0.0, 1.0);
texel[GCOMP] = CLAMP(g, 0.0, 1.0);
texel[BCOMP] = CLAMP(b, 0.0, 1.0);
texel[ACOMP] = 1.0F;
}
#if DIM == 3
static void store_texel_ycbcr_rev(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
/* XXX to do */
}
#endif
#undef TEXEL_ADDR
#undef DIM
#undef FETCH