sf: Determine if virtual display can use HWC for composition
For HWC virtual display using V4L2 approach:
1. HWC virtual display implementation doesn't send output buffer
back to Surface Flinger.
2. For non-wfd virtual displays(e.g. Simulated Secondary Displays,
Screen Record, CTS etc..), configure VDS to use GPU for
composition on output/sink buffer.
3. For wfd virtual display (a.k.a hybrid wfd), use
Framebuffer surface (similar to external display mechanism).
For HWC virtual display using VDS approach:
1. HWC is allocated for first virtual display connection.
2. Subsequent virtual display sessions will be composed by GLES driver.
ToDo: Modify VDS component to allocate hwcDisplayId based on
mForceHwcCopy (which is based on Usage Flags)
Change-Id: Ib7d2c00ca5fa07908b2eac8085654f8d2cd9af0b
4 files changed