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/*
* Mesa 3-D graphics library
* Version: 4.0.4
*
* Copyright (C) 1999-2002 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.
*
* Authors:
* Gareth Hughes <gareth@valinux.com>
* Brian Paul
*/
#if DIM == 1
#define CHAN_SRC( t, i, j, k, sz ) \
((GLchan *)(t)->Data + (i) * (sz))
#define UBYTE_SRC( t, i, j, k, sz ) \
((GLubyte *)(t)->Data + (i) * (sz))
#define USHORT_SRC( t, i, j, k ) \
((GLushort *)(t)->Data + (i))
#define FLOAT_SRC( t, i, j, k ) \
((GLfloat *)(t)->Data + (i))
#define FETCH(x) fetch_1d_texel_##x
#elif DIM == 2
#define CHAN_SRC( t, i, j, k, sz ) \
((GLchan *)(t)->Data + ((t)->RowStride * (j) + (i)) * (sz))
#define UBYTE_SRC( t, i, j, k, sz ) \
((GLubyte *)(t)->Data + ((t)->RowStride * (j) + (i)) * (sz))
#define USHORT_SRC( t, i, j, k ) \
((GLushort *)(t)->Data + ((t)->RowStride * (j) + (i)))
#define FLOAT_SRC( t, i, j, k ) \
((GLfloat *)(t)->Data + ((t)->RowStride * (j) + (i)))
#define FETCH(x) fetch_2d_texel_##x
#elif DIM == 3
#define CHAN_SRC( t, i, j, k, sz ) \
(GLchan *)(t)->Data + (((t)->Height * (k) + (j)) * \
(t)->RowStride + (i)) * (sz)
#define UBYTE_SRC( t, i, j, k, sz ) \
((GLubyte *)(t)->Data + (((t)->Height * (k) + (j)) * \
(t)->RowStride + (i)) * (sz))
#define USHORT_SRC( t, i, j, k ) \
((GLushort *)(t)->Data + (((t)->Height * (k) + (j)) * \
(t)->RowStride + (i)))
#define FLOAT_SRC( t, i, j, k ) \
((GLfloat *)(t)->Data + (((t)->Height * (k) + (j)) * \
(t)->RowStride + (i)))
#define FETCH(x) fetch_3d_texel_##x
#else
#error illegal number of texture dimensions
#endif
static void FETCH(rgba)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLchan *src = CHAN_SRC( texImage, i, j, k, 4 );
GLchan *rgba = (GLchan *) texel;
COPY_CHAN4( rgba, src );
}
static void FETCH(rgb)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLchan *src = CHAN_SRC( texImage, i, j, k, 3 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = src[0];
rgba[GCOMP] = src[1];
rgba[BCOMP] = src[2];
rgba[ACOMP] = CHAN_MAX;
}
static void FETCH(alpha)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLchan *src = CHAN_SRC( texImage, i, j, k, 1 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = 0;
rgba[GCOMP] = 0;
rgba[BCOMP] = 0;
rgba[ACOMP] = src[0];
}
static void FETCH(luminance)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLchan *src = CHAN_SRC( texImage, i, j, k, 1 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = src[0];
rgba[GCOMP] = src[0];
rgba[BCOMP] = src[0];
rgba[ACOMP] = CHAN_MAX;
}
static void FETCH(luminance_alpha)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLchan *src = CHAN_SRC( texImage, i, j, k, 2 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = src[0];
rgba[GCOMP] = src[0];
rgba[BCOMP] = src[0];
rgba[ACOMP] = src[1];
}
static void FETCH(intensity)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLchan *src = CHAN_SRC( texImage, i, j, k, 1 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = src[0];
rgba[GCOMP] = src[0];
rgba[BCOMP] = src[0];
rgba[ACOMP] = src[0];
}
static void FETCH(color_index)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLchan *src = CHAN_SRC( texImage, i, j, k, 1 );
GLchan *index = (GLchan *) texel;
*index = *src;
}
static void FETCH(depth_component)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLfloat *src = FLOAT_SRC( texImage, i, j, k );
GLfloat *depth = (GLfloat *) texel;
*depth = *src;
}
static void FETCH(rgba8888)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 4 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( src[3] );
rgba[GCOMP] = UBYTE_TO_CHAN( src[2] );
rgba[BCOMP] = UBYTE_TO_CHAN( src[1] );
rgba[ACOMP] = UBYTE_TO_CHAN( src[0] );
}
static void FETCH(argb8888)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 4 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( src[2] );
rgba[GCOMP] = UBYTE_TO_CHAN( src[1] );
rgba[BCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[ACOMP] = UBYTE_TO_CHAN( src[3] );
}
static void FETCH(rgb888)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 3 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( src[2] );
rgba[GCOMP] = UBYTE_TO_CHAN( src[1] );
rgba[BCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[ACOMP] = CHAN_MAX;
}
static void FETCH(rgb565)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLushort *src = USHORT_SRC( texImage, i, j, k );
const GLushort s = *src;
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf8) * 255 / 0xf8 );
rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 3) & 0xfc) * 255 / 0xfc );
rgba[BCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xf8) * 255 / 0xf8 );
rgba[ACOMP] = CHAN_MAX;
}
static void FETCH(argb4444)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLushort *src = USHORT_SRC( texImage, i, j, k );
const GLushort s = *src;
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf) * 255 / 0xf );
rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 4) & 0xf) * 255 / 0xf );
rgba[BCOMP] = UBYTE_TO_CHAN( ((s ) & 0xf) * 255 / 0xf );
rgba[ACOMP] = UBYTE_TO_CHAN( ((s >> 12) & 0xf) * 255 / 0xf );
}
static void FETCH(argb1555)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLushort *src = USHORT_SRC( texImage, i, j, k );
const GLushort s = *src;
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 10) & 0x1f) * 255 / 0x1f );
rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 5) & 0x1f) * 255 / 0x1f );
rgba[BCOMP] = UBYTE_TO_CHAN( ((s ) & 0x1f) * 255 / 0x1f );
rgba[ACOMP] = UBYTE_TO_CHAN( ((s >> 15) & 0x01) * 255 );
}
static void FETCH(al88)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 2 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[GCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[BCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[ACOMP] = UBYTE_TO_CHAN( src[1] );
}
static void FETCH(rgb332)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 1 );
const GLubyte s = *src;
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( ((s ) & 0xe0) * 255 / 0xe0 );
rgba[GCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xe0) * 255 / 0xe0 );
rgba[BCOMP] = UBYTE_TO_CHAN( ((s << 5) & 0xc0) * 255 / 0xc0 );
rgba[ACOMP] = CHAN_MAX;
}
static void FETCH(a8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 1 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = 0;
rgba[GCOMP] = 0;
rgba[BCOMP] = 0;
rgba[ACOMP] = UBYTE_TO_CHAN( src[0] );
}
static void FETCH(l8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 1 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[GCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[BCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[ACOMP] = CHAN_MAX;
}
static void FETCH(i8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 1 );
GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[GCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[BCOMP] = UBYTE_TO_CHAN( src[0] );
rgba[ACOMP] = UBYTE_TO_CHAN( src[0] );
}
static void FETCH(ci8)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 1 );
GLchan *index = (GLchan *) texel;
*index = UBYTE_TO_CHAN( *src );
}
/* XXX this may break if GLchan != GLubyte */
static void FETCH(ycbcr)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLushort *src0 = USHORT_SRC( texImage, (i & ~1), j, k ); /* 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 */
GLchan *rgba = (GLchan *) texel;
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));
}
rgba[RCOMP] = CLAMP(r, 0, CHAN_MAX);
rgba[GCOMP] = CLAMP(g, 0, CHAN_MAX);
rgba[BCOMP] = CLAMP(b, 0, CHAN_MAX);
rgba[ACOMP] = CHAN_MAX;
}
/* XXX this may break if GLchan != GLubyte */
static void FETCH(ycbcr_rev)( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLushort *src0 = USHORT_SRC( texImage, (i & ~1), j, k ); /* even */
const GLushort *src1 = src0 + 1; /* odd */
const GLubyte y0 = *src0 & 0xff; /* luminance */
const GLubyte cr = (*src0 >> 8) & 0xff; /* chroma U */
const GLubyte y1 = *src1 & 0xff; /* luminance */
const GLubyte cb = (*src1 >> 8) & 0xff; /* chroma V */
GLchan *rgba = (GLchan *) texel;
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));
}
rgba[RCOMP] = CLAMP(r, 0, CHAN_MAX);
rgba[GCOMP] = CLAMP(g, 0, CHAN_MAX);
rgba[BCOMP] = CLAMP(b, 0, CHAN_MAX);
rgba[ACOMP] = CHAN_MAX;
}
#undef CHAN_SRC
#undef UBYTE_SRC
#undef USHORT_SRC
#undef FLOAT_SRC
#undef FETCH
#undef DIM
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