cell: checkpoint commit of new per-fragment processing

Do code generation for alpha test, z test, stencil, blend, colormask
and framebuffer/tile read/write as a single code block.
Ian's previous blend/z/stencil test code is still there but mostly disabled
and will be removed soon.

1 files changed, 35 insertions, 0 deletions

diff --git a/src/gallium/winsys/xlib/xm_winsys.c b/src/gallium/winsys/xlib/xm_winsys.c
index 5e9a1f92f1..c4a30d3702 100644
--- a/src/gallium/winsys/xlib/xm_winsys.c
+++ b/src/gallium/winsys/xlib/xm_winsys.c
@@ -276,6 +276,39 @@ 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(uint *tile)
+{
+   uint tile2[TILE_SIZE * TILE_SIZE];
+   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);
+         tile2[y * TILE_SIZE + (x + 0)] = tile[k];
+         tile2[y * TILE_SIZE + (x + 1)] = tile[k+1];
+         tile2[(y + 1) * TILE_SIZE + (x + 0)] = tile[k+2];
+         tile2[(y + 1) * TILE_SIZE + (x + 1)] = tile[k+3];
+      }
+   }
+   memcpy(tile, tile2, sizeof(tile2));
+}
+
+
+
+/**
  * Display a surface that's in a tiled configuration.  That is, all the
  * pixels for a TILE_SIZExTILE_SIZE block are contiguous in memory.
  */
@@ -321,6 +354,8 @@ xmesa_display_surface_tiled(XMesaBuffer b, const struct pipe_surface *surf)
 
          ximage->data = (char *) xm_buf->data + offset;
 
+         twiddle_tile((uint *) ximage->data);
+
          if (XSHM_ENABLED(xm_buf)) {
 #if defined(USE_XSHM) && !defined(XFree86Server)
             XShmPutImage(b->xm_visual->display, b->drawable, b->gc,