-/**
- * 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.
- */
-void
-xlib_cell_display_surface(struct xmesa_buffer *b, struct pipe_surface *surf)
-{
- XImage *ximage;
- struct xm_buffer *xm_buf = xm_buffer(surf->buffer);
- const uint tilesPerRow = (surf->width + TILE_SIZE - 1) / TILE_SIZE;
- uint x, y;
-
- 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;
- ximage->height = TILE_SIZE;
- ximage->bytes_per_line = TILE_SIZE * 4;
- }
-
- 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;
- 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)
- XShmPutImage(b->xm_visual->display, b->drawable, b->gc,
- ximage, 0, 0, x, y, w, h, False);
-#endif
- }
- 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, x, y, w, h);
- }
- }
- }
-}
-
-