📄 texformat_tmp.h
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/* 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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR(texImage, i, j, k);
*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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR(texImage, i, j, k);
*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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR(texImage, i, j, k);
*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 = *USHORT_ADDR( texImage, i, j, k );
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 = *USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR(texImage, i, j, k);
*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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR(texImage, i, j, k);
*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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR(texImage, i, j, k);
*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 = *USHORT_ADDR( texImage, i, j, k );
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 = *USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR(texImage, i, j, k);
*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 = *USHORT_ADDR( texImage, i, j, k );
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 = *USHORT_ADDR( texImage, i, j, k );
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 = USHORT_ADDR(texImage, i, j, k);
*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 = UBYTE_ADDR( 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 = UBYTE_ADDR( 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 = UBYTE_ADDR(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 = UBYTE_ADDR( 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 = UBYTE_ADDR( texImage, i, j, k, 1 );
texel[RCOMP] =
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