On 11/12/2013 11:06 AM, Paul Berry wrote: > On 4 November 2013 14:24, Paul Berry <stereotype...@gmail.com > <mailto:stereotype...@gmail.com>> wrote: > > i965/gen7 hardware doesn't perform alpha blending correctly when > compressed (CMS) multisampled buffers are in use. Therefore, we need > to detect when alpha blending is used on a compressed multisampled > buffer, and convert the buffer to uncompressed (UMS) layout. > > Once a given buffer has been converted from CMS to UMS, we leave it in > UMS mode forever after, because (a) the conversion is expensive, and > (b) it seems likely that if alpha blending is performed on a buffer > once, it will probably be performed again on subsequent frames. > > Fixes glitches in GTA San Andreas under Wine. > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=53077 > > > NAK this patch. I found the true source of the problem: multisampled > buffers need to use a vertical alignment of 4. We were using a vertical > alignment of 2. > > I'll follow up with a proper fix ASAP.
Haha...that's going to be a bit nicer :) A two line patch instead of this monstrous blit thing. Nice find! --Ken _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
