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authorDave Airlie <airlied@redhat.com>2010-10-07 15:34:31 +1000
committerDave Airlie <airlied@redhat.com>2010-10-13 09:30:03 +1000
commitd02993c9dcdf8171a733a4da06236accf4e7d78f (patch)
treea09dad08bb1a701bfbb1d46d957d98d950bfd87f /src/gallium/auxiliary/util
parent67e71429f13aedf1cc8bf444708a7aa65223ac0a (diff)
gallium/util: add S8 tile sampling support.
Diffstat (limited to 'src/gallium/auxiliary/util')
-rw-r--r--src/gallium/auxiliary/util/u_tile.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_tile.c b/src/gallium/auxiliary/util/u_tile.c
index 3099bc6f48..44cadbfcdd 100644
--- a/src/gallium/auxiliary/util/u_tile.c
+++ b/src/gallium/auxiliary/util/u_tile.c
@@ -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;