Nice features to have:
- YUV->RGB color conversion for video
- Filters/Image convolution
Similar APIs
- Clutter
- CoreAnimation
API notes:
In the hardware accelerated version there are two phases. Layer drawing and layer compositing.
- Layer drawing creates the content for a surface.
- Layer compositing draws the layer on top of what ever is beneath it
Issues:
- VRAM
- layer's that don't have a backing store
- how does software rendering fit in