[Webkit-unassigned] [Bug 106842] adding support for DiscardablePixelRef for caching lazily decoded images

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=106842





--- Comment #74 from Min Qin <qinmin at chromium.org>  2013-01-25 17:36:22 PST ---
Hi, James, I update the code and comments, please take another look.

For dst->lockPixels(), we have to call it so skbitmap can have correct pixels. 

Since the memory have to be locked when the first onLockPixels（） are called, we have to ignore the first onLockPixels(). We cannot leave memory unlocked for the first onLockPixels, coz otherwise we will have a situation that the memory got purged before onLockPixels(). Then we have to create ashmem again, and the same thing happens again...

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