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Timm Bäder authored
As per the spec: > The back buffer can > either be reported as invalid (has an age of 0) or it may be > reported to contain the contents from n frames prior to the > current frame. So a buffer age of 1 means that the buffer was used in the last frame. We were handling buffer_age==1 the same as buffer_age==0, i.e. we returned the full damage for the surface. [1] https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_buffer_age.txt
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