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gallium/util: add S8 tile sampling support.

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This commit is contained in:
Dave Airlie 2010-10-07 15:34:31 +10:00
parent 67e71429f1
commit d02993c9dc
1 changed files with 27 additions and 0 deletions
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27
src/gallium/auxiliary/util/u_tile.c
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@ -269,6 +269,30 @@ x24s8_get_tile_rgba(const unsigned *src,
}
}
/**
* Return S component as four uint32_t in [0..255]. Z part ignored.
*/
static void
s8_get_tile_rgba(const unsigned char *src,
unsigned w, unsigned h,
float *p,
unsigned dst_stride)
{
unsigned i, j;
for (i = 0; i < h; i++) {
float *pRow = p;
for (j = 0; j < w; j++, pRow += 4) {
pRow[0] =
pRow[1] =
pRow[2] =
pRow[3] = (float)(*src++ & 0xff);
}
p += dst_stride;
}
}
/*** PIPE_FORMAT_Z32_FLOAT ***/
/**
@ -312,6 +336,9 @@ pipe_tile_raw_to_rgba(enum pipe_format format,
case PIPE_FORMAT_Z24X8_UNORM:
s8z24_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
break;
case PIPE_FORMAT_S8_USCALED:
s8_get_tile_rgba((unsigned char *) src, w, h, dst, dst_stride);
break;
case PIPE_FORMAT_X24S8_USCALED:
s8x24_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
break;