b625cdcf20
Previously we assumed that cursor planes occluded nothing and would always be blended, but overlay and scanout planes would always occlude what's behind them. This is not actually true, as we can support alpha blending on any kind of plane type now. Remove the special case, which might hopefully fix some weird display issues along the way. (Noticed by inspection.) Signed-off-by: Daniel Stone <daniels@collabora.com>