654580 - Shadow layer composition support for OS X with OpenGL

Status: RESOLVED WONTFIX

(Core :: Graphics, defect)

Description

[Joe Drew (not getting mail)]

This is like bug 648480, but for OS X with OpenGL. We might already be done here, but someone needs to verify this and/or fix it on OS X.

Comment 1

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

Yeah, this should pretty much work already.  We might want to use one of those magical client-storage thingies to save on uploading.

Comment 2

[Matt Woodrow (:mattwoodrow)]

We'd still have to do a blocking copy in the chrome process.

How hard is it to run GL layers in the content process? That way we could render into a pixel buffer object there, upload to a texture (non-blocking!) and share across processes using an IOSurface.

Comment 3

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

(In reply to comment #2)
> We'd still have to do a blocking copy in the chrome process.

There's no technical reason why we can't share client-storage memory or some other pixmap-ID thing across processes on OS X.  Whether OS X *allows* that is another question ...

> How hard is it to run GL layers in the content process? That way we could
> render into a pixel buffer object there, upload to a texture (non-blocking!)
> and share across processes using an IOSurface.

It's a lot of new code to maintain, and dead-end code too, as azure will obsolete it.  But if we gotta do it we gotta do it.

Comment 4

[Gregory Pappas [:gregp]]

ShadowLayer stuff was removed in bug 1727488