1554525 - [Wayland] Implement WindowBackBufferDMABuf backend for Wayland renderer

Status: RESOLVED FIXED

(Core :: Widget: Gtk, enhancement, P3)

Description

[Martin Stránský [:stransky] (ni? me)]

Implement new WindowBackBufferDMABuf Wayland backend surface type for WindowSurfaceWayland. This backend allows to draw directly to video memory and bypass a wayland compositor.

Comment 1

[Martin Stránský [:stransky] (ni? me)]

Attachment: Bug 1554525 - [Wayland] Implement WindowBackBufferDMABuf backend for Wayland renderer, r=jhorak

• Rename recent WindowBackBuffer class to WindowBackBufferShm to clearly state that it uses Shm memory to store the pixel buffer.
• Implement WindowBackBufferDMABuf which stores pixel data in GPU memory in WaylandDMABufSurface object.
• Use WaylandDMABufSurface as a wayland backend when DMABuf is available and gfx.wayland_dmabuf_backend.enabled is set.
• Implement WindowImageSurface which temporary stores front buffer pixel data. It's used when front buffer is used by compositor and we want to draw.
  Instead of the front/back buffer flip and read-back data from front buffer, don't flip, store the drawing and draw the pixels when compositor
  releases the front buffer.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/2bb77ed1fcc5
[Wayland] Implement WindowBackBufferDMABuf backend for Wayland renderer, r=jhorak

Comment 3

[Noemi Erli[:noemi_erli]]

https://hg.mozilla.org/mozilla-central/rev/2bb77ed1fcc5