[Mesa-dev] [PATCH] i965: Make sure we always compute valid index bounds before drawing.

[Iago Toral Quiroga]

When doing software rendering (i.e. rendering to the selection buffer) we need
to make sure that we have valid index bounds before calling _tnl_draw_prims(),
otherwise we can crash.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59455
---
 src/mesa/drivers/dri/i965/brw_draw.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index d684c17..498cfe2 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -554,7 +554,8 @@ void brw_draw_prims( struct gl_context *ctx,
     * get the minimum and maximum of their index buffer so we know what range
     * to upload.
     */
-   if (!vbo_all_varyings_in_vbos(arrays) && !index_bounds_valid) {
+   if ((!vbo_all_varyings_in_vbos(arrays) || ctx->RenderMode != GL_RENDER)
+       && !index_bounds_valid) {
       perf_debug("Scanning index buffer to compute index buffer bounds.  "
                  "Use glDrawRangeElements() to avoid this.\n");
       vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
-- 
1.8.3.2