[Mesa-dev] [PATCH 1/3] intel: Fix bad read/write flags on self-copies for glCopyBufferSubData().

[Eric Anholt]

We didn't consume these flags in any way that would produce a
functional difference, but we might have some day.
---
 src/mesa/drivers/dri/intel/intel_buffer_objects.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/intel/intel_buffer_objects.c b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
index 4a1a816..9b1f642 100644
--- a/src/mesa/drivers/dri/intel/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
@@ -663,7 +663,9 @@ intel_bufferobj_copy_subdata(struct gl_context *ctx,
        */
       if (src == dst) {
 	 char *ptr = intel_bufferobj_map_range(ctx, 0, dst->Size,
-					       GL_MAP_READ_BIT, dst);
+					       GL_MAP_READ_BIT |
+					       GL_MAP_WRITE_BIT,
+					       dst);
 	 memmove(ptr + write_offset, ptr + read_offset, size);
 	 intel_bufferobj_unmap(ctx, dst);
       } else {
-- 
1.7.7.3