933878 - Support creation of 'headless' GLContexts

Status: RESOLVED FIXED

(Core :: Graphics: CanvasWebGL, defect)

Description

[Kelsey Gilbert [:jgilbert]]

Currently, when you request a GLContext of a certain size, if the size is too big, we fail to give back a context. If we want to fallback to reducing the resolution if the requested size is too big (like for WebGL), we need to either create and destroy a large number of contexts trying to reduce the size to within acceptable limits, or start with a dummy 1x1 GLContext, and then start trying to resize to the requested size before reducing. (wasting time allocating and setting up a bunch of buffers that we'll usually never use)

What we really want is a headless context, which we can then try to add a backbuffer to after its created.

Comment 1

[Kelsey Gilbert [:jgilbert]]

We do this now.