Bug 117772 – [CSS Blending] Background blending is not performed beyond opaque background layers

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: CSS

[Ryosuke Niwa]

Consider merging https://chromium.googlesource.com/chromium/blink/+/e5c8e0d80e03728effad4a2708c5a6d4c8d394cc

If an element has the background defined as two opaque layers, let's say a jpg image
and a background color, and background blending is specified via CSS, the operation
isn't performed.

The fix consists of adding another condition in RenderBox::PaintFillLayers to shortcircuit
at the next background layer only if there's no blending operation applied to it.
Otherwise, the layer should be passed forward for painting.

[Mihai Tica]

(In reply to comment #0)
> Consider merging https://chromium.googlesource.com/chromium/blink/+/e5c8e0d80e03728effad4a2708c5a6d4c8d394cc
> 
> If an element has the background defined as two opaque layers, let's say a jpg image
> and a background color, and background blending is specified via CSS, the operation
> isn't performed.
> 
> The fix consists of adding another condition in RenderBox::PaintFillLayers to shortcircuit
> at the next background layer only if there's no blending operation applied to it.
> Otherwise, the layer should be passed forward for painting.

This also got into WebKit first :D
Here's the changeset that addressed this problem: http://trac.webkit.org/changeset/151547, we should probably close this.

[Ryosuke Niwa]

Great!

*** This bug has been marked as a duplicate of bug 117532 ***