[Webkit-unassigned] [Bug 105803] New: [EFL][WK2] Regression(138462) Sometimes garbage in snapshots

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=105803

           Summary: [EFL][WK2] Regression(138462) Sometimes garbage in
                    snapshots
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ostap73 at gmail.com


In EwkViewImpl::takeSnapshot surface created by cairo_image_surface_create_for_data is returned, but buffer is release on exit.
Doc for cairo_image_surface_create_for_data here http://www.cairographics.org/manual/cairo-Image-Surfaces.html#cairo-image-surface-create-for-data says:
"The output buffer must be kept around until the cairo_surface_t is destroyed or cairo_surface_finish() is called on the surface."

It just keeps pointer internally to the provided image buffer. The data from buffer is copied only in WKImageCreateFromCairoSurface.
Mostly it works because data is copied immediately after return from already deallocated memory block, but I don't think it is right.

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