Some of the css3/blending test however seems to pass. I have rebaselined a bunch of them in https://trac.webkit.org/r214223 because the produced image looked similar enough to me to infer that the test was passing. You can check that diffs by running this script and using the arrow keys and closing the window to check the next diff: http://sprunge.us/GTHK

The feature has been enabled in r247297. Most of the tests pass now, but there are still failures, like those related with blending on composited layers. For more details check bug 199513 where it was enabled the feature

After r247297 we have this status: new passes css3/blending/svg-blend-multiply-alpha.html css3/blending/svg-blend-normal.html css3/blending/svg-blend-plus-darker.html css3/blending/svg-blend-plus-lighter.html css3/blending/svg-isolation-isolated-group.html new failures (all of them pass on my system, so it must be a problem with the bot) css3/blending/blend-mode-accelerated-with-multiple-stacking-contexts.html [ Failure ] css3/blending/blend-mode-ancestor-clipping-layer.html [ Failure ] css3/blending/blend-mode-background.html [ Failure ] css3/blending/blend-mode-blended-element-overlapping-composited-sibling-should-have-compositing-layer.html [ Failure ] css3/blending/blend-mode-isolation-accelerated-overflow-hidden.html [ Failure ] css3/blending/blend-mode-isolation-flags-append-non-stacking-context-blending.html [ Failure ] css3/blending/blend-mode-isolation-flags-append-stacking-context-blending.html [ Failure ] css3/blending/blend-mode-isolation-flags-turn-off-blending-no-isolation.html [ Failure ] css3/blending/blend-mode-isolation-flags-turn-off-blending.html [ Failure ] css3/blending/blend-mode-isolation-flags-turn-off-stacking-context.html [ Failure ] css3/blending/blend-mode-isolation-flags-turn-on-blending.html [ Failure ] css3/blending/blend-mode-isolation-flags-turn-on-stacking-context.html [ Failure ] css3/blending/blend-mode-overflow.html [ Failure ] css3/blending/blend-mode-parent-of-composited-blended-has-layer.html [ Failure ] css3/blending/blend-mode-property-parsing.html [ Failure ] css3/blending/blend-mode-property.html [ Failure ] css3/blending/blend-mode-simple.html [ Failure ] css3/blending/blend-mode-transform-style.html [ Failure ] css3/blending/blend-mode-with-composited-descendant-should-have-layer.html [ Failure ] css3/blending/isolation-parsing.html [ Failure ] css3/blending/repaint/blend-mode-isolate-stacking-context.html [ Failure ] css3/blending/repaint/blend-mode-turn-off-isolation-no-effect.html [ Failure ] css3/blending/repaint/blend-mode-turn-off-isolation.html [ Failure ] css3/blending/svg-blend-layer-blend.html [ Failure ] css3/blending/svg-blend-layer-clip-path.html [ Failure ] css3/blending/svg-blend-layer-filter.html [ Failure ] css3/blending/svg-blend-layer-mask.html [ Failure ] css3/blending/svg-blend-layer-opacity.html [ Failure ] css3/blending/blend-mode-body-child-background-color.html [ ImageOnlyFailure ] css3/blending/blend-mode-body-child-isolate-html-background-color.html [ ImageOnlyFailure ] css3/blending/blend-mode-body-child.html [ ImageOnlyFailure ] css3/blending/blend-mode-body-element.html [ ImageOnlyFailure ] css3/blending/blend-mode-html-element-screen.html [ ImageOnlyFailure ]

(In reply to Miguel Gomez from comment #3) > After r247297 we have this status: and more failures: imported/blink/css3/blending/mix-blend-mode-background-size.html [ ImageOnlyFailure ] imported/blink/css3/blending/mix-blend-mode-multiply.html [ ImageOnlyFailure ] imported/blink/css3/blending/mix-blend-mode-with-opacity-change-js.html [ ImageOnlyFailure ] imported/blink/css3/blending/mix-blend-mode-with-squashing-layer.html [ ImageOnlyFailure ] imported/blink/css3/blending/svg-blend-overlapping-elements.html [ ImageOnlyFailure ] imported/blink/css3/blending/svg-isolation-foreign-no-isolation.html [ ImageOnlyFailure ] imported/blink/css3/blending/svg-isolation-nested-svg-no-isolation.html [ ImageOnlyFailure ] from these, only this one is not passing in my system imported/blink/css3/blending/mix-blend-mode-with-squashing-layer.html [ ImageOnlyFailure ]

and more failures (all of them passing on my system) inspector/layers/layers-blending-compositing-reasons.html [ Failure ] legacy-animation-engine/transitions/blendmode-transitions.html [ Failure ] transitions/blendmode-transitions.html [ Failure ]

I will check what's going on the bot. Please don't mark them as failing still.

(In reply to Carlos Alberto Lopez Perez from comment #6) > I will check what's going on the bot. Please don't mark them as failing > still. The test bot was not fully upgraded to Debian 10. I upgraded it. Now results are a bit better. But even after that there are some css3/blending tests failing on the bot that pass on my dev machine (running Debian 10 as well). I think it may be related to some configuration of something that I have, which happens to be different that on the bot. Because I can reproduce what happens on the bot by simply running the tests with an empty home like in: HOME=$(mktemp -d) Tools/Scripts/run-webkit-tests --gtk css3/blending imported/blink/css3/blending This happens when I do that: Regressions: Unexpected text-only failures (5) css3/blending/svg-blend-layer-blend.html [ Failure ] css3/blending/svg-blend-layer-clip-path.html [ Failure ] css3/blending/svg-blend-layer-filter.html [ Failure ] css3/blending/svg-blend-layer-mask.html [ Failure ] css3/blending/svg-blend-layer-opacity.html [ Failure ] Regressions: Unexpected image-only failures (1) imported/blink/css3/blending/mix-blend-mode-with-squashing-layer.html [ ImageOnlyFailure ] Which doesn't happen if I use my $HOME. The thing is that the test passing in both cases (if you actually look at what the test does and the result), but since the layers are places in different places (more margin on the left in one case) it sets it as failing. I will rebase this tests and look forward to propose a patch for run-webkit-tests so it runs with an empty home by default always.

(In reply to Carlos Alberto Lopez Perez from comment #7) > Regressions: Unexpected image-only failures (1) > imported/blink/css3/blending/mix-blend-mode-with-squashing-layer.html [ > ImageOnlyFailure ] > This one is failing in both cases.

(In reply to Carlos Alberto Lopez Perez from comment #7) > I will rebase this tests Done in r247376 > and look forward to propose a patch for > run-webkit-tests so it runs with an empty home by default always. See bug 199738

The following tests had the same baseline as mac/ios and are also passing on WPE. Moved them to glib platform and updated the expectation to be shared between both ports in r273569. css3/blending/svg-blend-color-burn.html css3/blending/svg-blend-color-dodge.html css3/blending/svg-blend-darken.html css3/blending/svg-blend-difference.html css3/blending/svg-blend-exclusion.html css3/blending/svg-blend-lighten.html css3/blending/svg-blend-multiply.html css3/blending/svg-blend-overlay.html css3/blending/svg-blend-screen.html css3/blending/svg-blend-soft-light.html