[Mesa-dev] [PATCH] gallium/softpipe: Don't clobber dest color/alpha before masking.

[Brian Paul]

On 07/21/2011 06:59 PM, Younes Manton wrote:
> The blend_quad function clobbers the actual render target color/alpha
> values while applying the destination blend factor, which results in
> restoring the wrong value during the masking stage for write-disabled
> channels.
> ---
>   src/gallium/drivers/softpipe/sp_quad_blend.c |  185 +++++++++++++------------
>   1 files changed, 96 insertions(+), 89 deletions(-)


Reviewed-by: Brian Paul <brianp at vmware.com>

It would be nice to have piglit test to catch this case.

-Brian