Code review comment for lp:~robertcarr/mir/alpha-for-nested-servers

Daniel van Vugt (vanvugt) wrote :

Re #2: I'm not talking about nesting latency concerns. Just the performance overhead of blending.

During regular composition we rely on most surfaces to not be alpha, so they are candidates for bypass and occlusion culling. We also optimize the GL renderer for non-blendable surfaces, because it makes a performance difference.

So while blending is cool and great to use during various effects, I just want to make sure we're not blending still after login. Because that would be bad.

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