Merge commit 'origin/gallium-0.1' into gallium-0.2

[mesa.git] / src / gallium / winsys / xlib / xm_winsys.c

diff --git a/src/gallium/winsys/xlib/xm_winsys.c b/src/gallium/winsys/xlib/xm_winsys.c
index 70f01e0ef8310bf6b7e83414a91ce2bf8ce3819b..acb5ad8f714ea0299310e23003a019b5ce7f5b48 100644 (file)
--- a/src/gallium/winsys/xlib/xm_winsys.c
+++ b/src/gallium/winsys/xlib/xm_winsys.c
@@ -275,6 +275,37 @@ 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.
@@ -287,16 +318,16 @@ xmesa_display_surface_tiled(XMesaBuffer b, const struct pipe_surface *surf)
    const uint tilesPerRow = (surf->width + TILE_SIZE - 1) / TILE_SIZE;
    uint x, y;
 
-   /* check that the XImage has been previously initialized */
-   assert(ximage->format);
-   assert(ximage->bitmap_unit);
-
    if (XSHM_ENABLED(xm_buf) && (xm_buf->tempImage == NULL)) {
       alloc_shm_ximage(xm_buf, b, TILE_SIZE, TILE_SIZE);
    }
 
    ximage = (XSHM_ENABLED(xm_buf)) ? xm_buf->tempImage : b->tempImage;
 
+   /* check that the XImage has been previously initialized */
+   assert(ximage->format);
+   assert(ximage->bitmap_unit);
+
    if (!XSHM_ENABLED(xm_buf)) {
       /* update XImage's fields */
       ximage->width = TILE_SIZE;
@@ -306,24 +337,40 @@ 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) {
-         int dx = x;
-         int dy = y;
+         uint tmpTile[TILE_SIZE * TILE_SIZE];
          int tx = x / TILE_SIZE;
          int ty = y / TILE_SIZE;
          int offset = ty * tilesPerRow + tx;
-
-         offset *= 4 * TILE_SIZE * TILE_SIZE;
-
-         ximage->data = (char *) xm_buf->data + offset;
-
-         if (XSHM_ENABLED(xm_buf)) {
+         int w = TILE_SIZE;
+         int h = TILE_SIZE;
+
+         if (y + h > surf->height)
+            h = surf->height - y;
+         if (x + w > surf->width)
+            w = surf->width - x;
+
+         /* offset in pixels */
+         offset *= TILE_SIZE * TILE_SIZE;
+
+         if (0 && XSHM_ENABLED(xm_buf)) {
+            ximage->data = (char *) xm_buf->data + 4 * offset;
+            /* make copy of tile data */
+            memcpy(tmpTile, (uint *) ximage->data, sizeof(tmpTile));
+            /* twiddle from temp to ximage in shared memory */
+            twiddle_tile(tmpTile, (uint *) ximage->data);
+            /* display image in shared memory */
 #if defined(USE_XSHM) && !defined(XFree86Server)
             XShmPutImage(b->xm_visual->display, b->drawable, b->gc,
-                         ximage, 0, 0, x, y, TILE_SIZE, TILE_SIZE, False);
+                         ximage, 0, 0, x, y, w, h, False);
 #endif
-         } else {
+         }
+         else {
+            /* twiddle from ximage buffer to temp tile */
+            twiddle_tile((uint *) xm_buf->data + offset, tmpTile);
+            /* display temp tile data */
+            ximage->data = (char *) tmpTile;
             XPutImage(b->xm_visual->display, b->drawable, b->gc,
-                      ximage, 0, 0, dx, dy, TILE_SIZE, TILE_SIZE);
+                      ximage, 0, 0, x, y, w, h);
          }
       }
    }