1005414 - Use GPU when frame needs intermediate surface.

Status: RESOLVED DUPLICATE of bug 999699

(Core :: Graphics: Layers, defect)

Description

[Sushil]

In Camera App, when the Self-Timer is set to 3 seconds, the fading-out effect of ticks "2" and "1" is not visible on the preview frame. It is a regression caused by Bugzilla patch: https://bugzilla.mozilla.org/show_bug.cgi?id=993160.

When self-timer ticks and "2" & "1" fade-out, there are multiple containers in those particular frames which need "Intermediate surface" and they do not have any leaves. But HWC works only on leaf layers so we never reach the check at [1]. So it is better to let GPU to handle a frame which needs intermediate surface. I checked by reverting this patch, the regression is fixed. I also verified that the original bug reported in Bugzilla # 993160 , does not exist even after reverting the patch, which means Camera preview is using HWC Composition on b2g v1.4 reference device, so we can now safely revert this patch. I will upload the revert of this patch.

Comment 1

[Sushil]

Forgot to mention, [1]: http://mxr.mozilla.org/mozilla-central/source/widget/gonk/HwcComposer2D.cpp#331