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For each frame, compare the frame boundaries, check if the format contains an alpha channel, check opacity, and skip the frame if it's going to be completely overwritten by a higher zorder frame. The check is O(n^2), but that doesn't matter here because the number of sinkpads is small. More can be done to avoid needless drawing, but this covers the majority of cases. See TODOs. Ideally, a reverse painter's algorithm should be used for optimal drawing, but memcpy during compositing is small compared to the CPU used for frame conversion on each pad. https://bugzilla.gnome.org/show_bug.cgi?id=746147 |
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| .gitignore | ||
| blend.c | ||
| blend.h | ||
| blendorc.h | ||
| compositor.c | ||
| compositor.h | ||
| compositororc-dist.c | ||
| compositororc-dist.h | ||
| compositororc.orc | ||
| compositorpad.h | ||
| Makefile.am | ||