[Webkit-unassigned] [Bug 126156] New: ImageBufferBackingStoreCache should support "opaque" surfaces

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=126156

           Summary: ImageBufferBackingStoreCache should support "opaque"
                    surfaces
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Platform
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: thorton at apple.com
                CC: simon.fraser at apple.com, mmaxfield at apple.com


That is, it should support surfaces that it doesn't waste time clearing in deallocate(), because the consumer of said surface knows that it's going to paint over the whole thing.

This may not make sense for the other applications, but it would shave ~3.7% of completely unnecessary main thread time off of my remote layer painting stress test.

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