1297597 - Investigate to bypass compositor for WebGL canvas elements in fullscreen mode on android

Status: NEW

(Core :: Graphics: Layers, defect)

Description

[Sotaro Ikeda [:sotaro]]

android firefox run without using content process, then it might be simpler to implement it than other platforms.

Comment 1

[Sotaro Ikeda [:sotaro]]

When WebVR is enabled, SharedSurfaceTextureClient is forwarded to VRDisplayHost and it composite the TextureHost without using gecko Compositor. VRManagerChild is derived from TextureForwarder, then it could allocate TextureClient. Current gecko seems not care about fullscreen in gecko. \

The following is a diagram around VRManager.
  https://github.com/sotaroikeda/firefox-diagrams/blob/master/gfx/gfx_VRManager_51.pdf

Comment 2

[Sotaro Ikeda [:sotaro]]

When Element is requested to be fullscreen, Element's primary frame occupy the screen. It does not ensure that fullscreen WebGL always fill screen. Background could be shown and chrome ui could be shown in some cases.

The following is a diagram around Element.requestFullscreen().
 https://github.com/sotaroikeda/firefox-diagrams/blob/master/dom/dom_Element_requestFullscreen_51.pdf

Comment 3

[Sotaro Ikeda [:sotaro]]

Attachment: temporal patch - Render WebGL directly to SurfaceView by very hacky way

The patch is just to check performance of WebGL when bypassing Compositor. The patch seems to have a problem to update rendering.