[Mesa-dev] [PATCH 14/15] i965/msaa: Implement manual blending operation for Gen7.

Paul Berry stereotype441 at gmail.com
Tue May 22 08:07:56 PDT 2012


On 22 May 2012 08:04, Kenneth Graunke <kenneth at whitecape.org> wrote:

> On 05/11/2012 11:03 AM, Paul Berry wrote:
>
>> On Gen6, the blending necessary to blit an MSAA surface to a non-MSAA
>> surface could be accomplished with a single texturing operation.  On
>> Gen7, the WM program must fetch each sample and blend them together
>> manually. This patch implements the manual blend operation.
>>
>
> It would be nice to indicate why (although it wasn't hard to find):
>
> From the Bspec/Shared Functions/Messages/Initiating Message/Message Types:
> "[DevIVB+]: Number of Multisamples on the associated surface must be
> MULTISAMPLECOUNT_1."


Good point.  I will update the commit message.
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