[Webkit-unassigned] [Bug 157848] New: [GTK][EFL] Filter and FilterEffect should not consider device scaling in Cairo environment

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=157848

            Bug ID: 157848
           Summary: [GTK][EFL] Filter and FilterEffect should not consider
                    device scaling in Cairo environment
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: utatane.tea at gmail.com

In Cairo environment, device scale factor is transparently handled by HW side using cairo_surface_set_device_scale.
ImageBuffer ignores resolution factor now. So we Filter and FilterEffect should not consider that ImageBuffer's size is scaled.

This leads crash in kangax's ES6 compat table page in HiDPI PC.

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