Bug 94120 – [CSS Shaders] css3/filters/custom/filter-fallback-to-software.html and css3/filters/custom/invalid-custom-filter-shader.html fail on Mac build bots

• Component: Layout and Rendering
• Status: RESOLVED DUPLICATE

[Alexandru Chiculita]

The following tests are failing on Mac Build Bots
  css3/filters/custom/filter-fallback-to-software.html = IMAGE
  css3/filters/custom/invalid-custom-filter-shader.html = IMAGE

[Alexandru Chiculita]

The bug is introduced by http://trac.webkit.org/changeset/125462 . The issue is that copyUnmultipliedImage and copyPremultipliedImage don't do the color conversion on Mac.

There are other filters that are also affected, for example FEComponentTransfer, FEGaussianBlur, FEComposite, FELighting, FEConvolveMatrix.

-webkit-filter: blur(0) has the same issue.

[Florin Malita]

(In reply to comment #1)
> The bug is introduced by http://trac.webkit.org/changeset/125462 .

Are you sure that the new results are incorrect? After 125462 filters are applied in a different color space (linearRGB, per spec), so the images are expected to be different. The intent was to mark them all for rebaseline, but some were missed.

[Alexandru Chiculita]

(In reply to comment #2)
> (In reply to comment #1)
> > The bug is introduced by http://trac.webkit.org/changeset/125462 .
> 
> Are you sure that the new results are incorrect? After 125462 filters are applied in a different color space (linearRGB, per spec), so the images are expected to be different. The intent was to mark them all for rebaseline, but some were missed.

I think -webkit-filter: blur(0); should not change the colors at all.

Also, adding a grayscale(0) before the blur(0) fixes the issue, that's why I think that is an implementation issue.

[Alexandru Chiculita]

*** Bug 94169 has been marked as a duplicate of this bug. ***

[Alexandru Chiculita]

*** This bug has been marked as a duplicate of bug 94372 ***