Mir

  1. Bug #1339471
  2. Comment #0

Comment 0 for bug 1339471

Revision history for this message
Daniel van Vugt (vanvugt) wrote : [regression] Alpha blending produces wrong colours - now additive

I just noticed client-provided alpha is not being blended correctly and mir_demo_client_multiwin looks significantly different now to how it always did up to around June. The resulting colours are additive (brighter) when clients with alpha overlap each other.

Test case: Run mir_demo_client_multiwin
Expected: Areas of overlap should be darker than non-overlapping areas
Observed: Areas of overlap are at least as bright as non-overlapping areas.