draw: fix intermediate buffer confusion in draw_vs_varient.c

The final output buffer can't be used to hold intermediate results
as the intermediate vertex size may be greater than the final vertex
size, and in any case the output buffer may be uncached in hw drivers.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/draw/draw_pt_fetch_shade_emit.c b/src/gallium/auxiliary/draw/draw_pt_fetch_shade_emit.c
index 5a1d79d996..5ce3aba2a2 100644
--- a/src/gallium/auxiliary/draw/draw_pt_fetch_shade_emit.c
+++ b/src/gallium/auxiliary/draw/draw_pt_fetch_shade_emit.c
@@ -193,6 +193,13 @@ static void fse_prepare( struct draw_pt_middle_end *middle,
    *max_vertices = (draw->render->max_vertex_buffer_bytes / 
                     (vinfo->size * 4));
 
+   /* Probably need to do this somewhere (or fix exec shader not to
+    * need it):
+    */
+   if (1) {
+      struct draw_vertex_shader *vs = draw->vs.vertex_shader;
+      vs->prepare(vs, draw);
+   }
    
 
    //return TRUE;