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Diffstat (limited to 'src/gallium/winsys/xlib/xm_winsys.c')
-rw-r--r--src/gallium/winsys/xlib/xm_winsys.c36
1 files changed, 35 insertions, 1 deletions
diff --git a/src/gallium/winsys/xlib/xm_winsys.c b/src/gallium/winsys/xlib/xm_winsys.c
index 5e9a1f92f11..2acbc94fc8d 100644
--- a/src/gallium/winsys/xlib/xm_winsys.c
+++ b/src/gallium/winsys/xlib/xm_winsys.c
@@ -276,6 +276,37 @@ xm_buffer_destroy(struct pipe_winsys *pws,
/**
+ * For Cell. Basically, rearrange the pixels/quads from this layout:
+ * +--+--+--+--+
+ * |p0|p1|p2|p3|....
+ * +--+--+--+--+
+ *
+ * to this layout:
+ * +--+--+
+ * |p0|p1|....
+ * +--+--+
+ * |p2|p3|
+ * +--+--+
+ */
+static void
+twiddle_tile(const uint *tileIn, uint *tileOut)
+{
+ int y, x;
+
+ for (y = 0; y < TILE_SIZE; y+=2) {
+ for (x = 0; x < TILE_SIZE; x+=2) {
+ int k = 4 * (y/2 * TILE_SIZE/2 + x/2);
+ tileOut[y * TILE_SIZE + (x + 0)] = tileIn[k];
+ tileOut[y * TILE_SIZE + (x + 1)] = tileIn[k+1];
+ tileOut[(y + 1) * TILE_SIZE + (x + 0)] = tileIn[k+2];
+ tileOut[(y + 1) * TILE_SIZE + (x + 1)] = tileIn[k+3];
+ }
+ }
+}
+
+
+
+/**
* Display a surface that's in a tiled configuration. That is, all the
* pixels for a TILE_SIZExTILE_SIZE block are contiguous in memory.
*/
@@ -306,6 +337,7 @@ xmesa_display_surface_tiled(XMesaBuffer b, const struct pipe_surface *surf)
for (y = 0; y < surf->height; y += TILE_SIZE) {
for (x = 0; x < surf->width; x += TILE_SIZE) {
+ uint tmpTile[TILE_SIZE * TILE_SIZE];
int tx = x / TILE_SIZE;
int ty = y / TILE_SIZE;
int offset = ty * tilesPerRow + tx;
@@ -319,7 +351,9 @@ xmesa_display_surface_tiled(XMesaBuffer b, const struct pipe_surface *surf)
offset *= 4 * TILE_SIZE * TILE_SIZE;
- ximage->data = (char *) xm_buf->data + offset;
+ twiddle_tile((uint *) ((char *) xm_buf->data + offset),
+ tmpTile);
+ ximage->data = (char*) tmpTile;
if (XSHM_ENABLED(xm_buf)) {
#if defined(USE_XSHM) && !defined(XFree86Server)