[Webkit-unassigned] [Bug 50716] New: Update validation of stencil mask and ref values

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=50716

           Summary: Update validation of stencil mask and ref values
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: kbr at google.com
                CC: cmarrin at apple.com, zmo at google.com, enne at google.com


Based on feedback from Daniel Koch from TransGaming, the section in the WebGL spec on restrictions on the stencil mask and ref values has been changed to do the validation at draw time rather than when stencilMaskSeparate and stencilFuncSeparate are called, since generating an INVALID_OPERATION error from those entry points may make it hard for applications to transition between states. The WebKit implementation needs to be updated to do the validation then as well. Ideally stencilMaskSeparate and stencilFuncSeparate would set a boolean flag which can be easily checked in drawArrays and drawElements.

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