draw: try to prevent overflows on index buffers

Pass in the size of the index buffer, when available, and use it
to handle out of bounds conditions. The behavior in the case of
an overflow needs to be the same as with other overflows in the
vertex processing pipeline meaning that a vertex should still
be generated but all attributes in it set to zero.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/gallium/drivers/nv30/nv30_draw.c b/src/gallium/drivers/nv30/nv30_draw.c
index 92185c922c2..e0a1628eb91 100644
--- a/src/gallium/drivers/nv30/nv30_draw.c
+++ b/src/gallium/drivers/nv30/nv30_draw.c
@@ -423,9 +423,9 @@ nv30_render_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
                                   PIPE_TRANSFER_READ, &transferi);
       draw_set_indexes(draw,
                        (ubyte *) map + nv30->idxbuf.offset,
-                       nv30->idxbuf.index_size);
+                       nv30->idxbuf.index_size, ~0);
    } else {
-      draw_set_indexes(draw, NULL, 0);
+      draw_set_indexes(draw, NULL, 0, 0);
    }
 
    draw_vbo(draw, info);