1.20 backport: glamor: Only use dual blending with GLSL >= 1.30 (!365) · Merge requests · xorg / xserver · GitLab

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Michel Dänzer requested to merge daenzer/xserver:server-1.20-branch into server-1.20-branch Dec 20, 2019

It can't be used with older GLSL. Fixes a crash when attempting to anyway.

Closes: #97 (closed) Fixes: e7308b6c "glamor: Add support for CA rendering in a single pass." Reviewed-by: Dave Airlie airlied@redhat.com Reviewed-by: Kenneth Graunke kenneth@whitecape.org (Cherry picked from commit 5bfca003)