[Webkit-unassigned] [Bug 220098] [WinCairo][WebGL2] webgl/2.0.0/conformance2/textures tests are failing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220098

--- Comment #5 from Kenneth Russell <kbr at google.com> ---
It's actually critical that uninitialized resources like textures be zeroed out by ANGLE. Did you enable the EGL_ROBUST_RESOURCE_INITIALIZATION_ANGLE flag in your EGL context creation? See this code and nearby code in Source/WebCore/platform/graphics/cocoa/GraphicsContextGLOpenGLCocoa.mm :

    // WebGL requires that all resources are cleared at creation.
    eglContextAttributes.append(EGL_ROBUST_RESOURCE_INITIALIZATION_ANGLE);
    eglContextAttributes.append(EGL_TRUE);

Ideally the WinCairo port should pick up all of these EGL initialization parameters.

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