1255307 - Stop asking for a context when doing widget theme painting (avoid gfxNativeDrawing)

Status: NEW

(Core :: Graphics, defect, P3)

Description

[Jeff Muizelaar [:jrmuizel]]

In order for off-main-thread-painting to have a nice time we need to defer drawing and don't want widget to be able to paint directly into our contexts.

With skia we also don't have a context to use directly for painting so we need a similar solution there.

Comment 1

[Jerry Shih[:jerry] (UTC+8) (inactive)]

If we try to prevent direct drawing into the context, we might just have some off-main-thread-painting checking to use the temp surface.

mac:
https://hg.mozilla.org/mozilla-central/annotate/dd1abe874252e507b825a0a4e1063b0e13578288/gfx/thebes/gfxQuartzNativeDrawing.cpp#l22

windows platform:
https://hg.mozilla.org/mozilla-central/annotate/dd1abe874252e507b825a0a4e1063b0e13578288/gfx/thebes/gfxWindowsNativeDrawing.cpp#l46