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, 1 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/draw/draw_llvm.h b/src/gallium/auxiliary/draw/draw_llvm.h
index d517b29..347fde2 100644
--- a/src/gallium/auxiliary/draw/draw_llvm.h
+++ b/src/gallium/auxiliary/draw/draw_llvm.h
@@ -271,6 +271,7 @@ typedef int
                            struct vertex_header *io,
                            const struct draw_vertex_buffer vbuffers[PIPE_MAX_ATTRIBS],
                            const unsigned *fetch_elts,
+                           unsigned fetch_max_elt,
                            unsigned fetch_count,
                            unsigned stride,
                            struct pipe_vertex_buffer *vertex_buffers,