For example, by default Flame's sprite batcher will call drawAtlas with a srcOver blend mode and a clear color (https://github.com/flame-engine/flame/blob/main/packages/flame/lib/src/sprite_batch.dart#L16-L17). this is equivalent to drawing the operation without any blending.

Since we're probably going to be walking the list of colors anyway, we could detect this case and elide the blend.