[Webkit-unassigned] [Bug 52311] [chromium] Add command-line flag to enable composite to offscreen texture.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52311





--- Comment #31 from W. James MacLean <wjmaclean at chromium.org>  2011-01-18 08:38:27 PST ---
(In reply to comment #30)

I've found the problem - good news is I was mistaken, and it's not DRT's fault.

The problem stems from using 

useRenderSurface(0);

in the call to copyOffscreenTextureToDisplay(). This has the side effect of setting 

m_currentRenderSurface = renderSurface; // = 0

which then causes a null pointer dereference in when we call m_defaultRenderSurface->draw(), since it calls setScissorToRect(), which attempts

int scissorX = scissorRect.x() - m_currentRenderSurface->m_contentRect.x();

Should I modify setScissorToRect() to handle this case (use rootLayer rect instead?), or stop using useRenderSurface(0)?

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