u_blitter: use PIPE_TRANSFER_DISCARD to prevent cpu/gpu stall

But the driver must be smart here and follow PIPE_TRANSFER_DISCARD, as it should.
2010-11-23 14:09:21 +01:00
parent c14a261eb9
commit 2c1de07ddf
1 changed files with 5 additions and 2 deletions
@@ -522,10 +522,13 @@ static void blitter_set_dst_dimensions(struct blitter_context_priv *ctx,
 static void blitter_draw_quad(struct blitter_context_priv *ctx)
 {
   struct pipe_context *pipe = ctx->base.pipe;
+   struct pipe_box box;

   /* write vertices and draw them */
-   pipe_buffer_write(pipe, ctx->vbuf,
-                     0, sizeof(ctx->vertices), ctx->vertices);
+   u_box_1d(0, sizeof(ctx->vertices), &box);
+   pipe->transfer_inline_write(pipe, ctx->vbuf, u_subresource(0,0),
+                               PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
+                               &box, ctx->vertices, sizeof(ctx->vertices), 0);

   util_draw_vertex_buffer(pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
                           4,  /* verts */