[Mesa-dev] [PATCH 6/7] softpipe: add dual source blending support
airlied at gmail.com
Mon Apr 9 08:14:33 PDT 2012
On Wed, Apr 4, 2012 at 4:16 PM, Brian Paul <brianp at vmware.com> wrote:
> On 04/03/2012 07:16 AM, Dave Airlie wrote:
>> From: Dave Airlie<airlied at redhat.com>
>> This adds support for a single dual source blending MRT to softpipe.
> Why can't we do dual-source blending to all RTs?
The problem is currently TGSI can't encode (location, index) color
So the shader outputs would have to be mapped from a 1 dimensional
array to something 2 dimensional,
either defining alternate output colors as primary/secondary, or the
secondary color as being an array after the primary color outputs.
So I checked the hw, and none of it does this, they all report 1 dual
source MRT, so I see no reason to make gallium care until someone
creates hw that cares.
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