martipopsandCodex
f9a97f264f
Expose renderer frames and surface handoff, with a standalone two-view GPU smoke example. Part 1 of the splitscreen series; normal game rendering is unchanged. Co-Authored-By: Codex <[email protected]>
1.1 KiB
Offscreen frame compositor
Part 1 of the splitscreen series (#3541). The renderer exposes its offscreen frame and can hand
its window surface to a compositor on the same GPU device. The compositor clears uncovered
pixels to black and copies each BGRA view to its assigned position, clipping at the window edge.
Returning the surface through Renderer::take_back lets the next renderer draw on the window
again. The normal game path does not create a compositor.
A standalone example exercises this without game resources, profiles, audio or launcher data:
cargo run --profile fast -p horizon-client-render --example compositor
cargo run --profile fast -p horizon-client-render --example compositor -- --smoke
The window shows a red view on the left and a blue one on the right. Resize it to check clipping and uncovered black regions. The smoke run presents 20 frames, switches vsync off, tests zero and oversized dimensions, resizes the window, then exits. Unsupported surface copy formats return an error. Unit coverage checks clipping while a view still has its old size during a resize.