Bug 87563 – [BlackBerry] BackingStore accesses tiles even though it's not active

• Component: WebKit BlackBerry
• Status: RESOLVED FIXED

[Arvid Nilsson]

PR #150403

            There are many scenarios that can call render and cause tile access,
            and they used to be rerouted to the direct rendering code when the
            backing store was not active. This was thanks to an implicit check for
            isActive() by virtue of calling shouldDirectRenderingToWindow() from
            render().
    
            If we're using OpenGL for compositing the backing store contents
            however, direct rendering is always disabled and we jump right into the
            tile based rendering code.
    
            Fixed by adding an explicit check for isActive() in render(), now that
            the implicit check in shouldDirectRenderingToWindow() is conditional on
            having raster usage.
    
            Since PR136381/bug83131, when OpenGL compositing is used, and the
            backing store is not active, it is not in charge of drawing the root
            layer. Instead, we switch off the paintingGoesToWindow flag on the root
            RenderLayer so no invalidates will reach the ChromeClient or the
            BackingStore any more. Instead, invalidations will cause the root
            accelerated compositing layer to be repainted. Any BackingStore render
            calls while in this state are pointless, and can safely do an early
            return.
    
            Reviewed internally by Jakob Petsovits.

[Arvid Nilsson]

Created attachment 144226 [details]
Patch

[WebKit Review Bot]

Comment on attachment 144226 [details]
Patch

Clearing flags on attachment: 144226

Committed r118626: <http://trac.webkit.org/changeset/118626>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.