tree 230d30c9ea0278d4d9adc09619681a217fcfa2d3
parent 4759fc9728b74fdcb18c723e5add5b9c9f5e6e13
author simon.fraser@apple.com <simon.fraser@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1524851965 +0000
committer simon.fraser@apple.com <simon.fraser@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1524851965 +0000

Make color-filter transform gradient colors
https://bugs.webkit.org/show_bug.cgi?id=185080

Reviewed by Zalan Bujtas.
Source/WebCore:

In CSSGradientValue::computeStops(), transform the color of each gradient color
stop through the color filter. Having a color filter makes the gradient uncacheable.

Color filters can add alpha, so we also have to fix up CSSGradientValue::knownToBeOpaque()
to take a RenderStyle and convert the colors before testing opaqueness. Clean up some related
functions to take const RenderStyle&.

Test: css3/color-filters/color-filter-gradients.html

* css/CSSCrossfadeValue.cpp:
(WebCore::subimageKnownToBeOpaque):
* css/CSSFilterImageValue.cpp:
(WebCore::CSSFilterImageValue::knownToBeOpaque const):
* css/CSSFilterImageValue.h:
* css/CSSGradientValue.cpp:
(WebCore::CSSGradientValue::image):
(WebCore::CSSGradientValue::computeStops):
(WebCore::CSSGradientValue::knownToBeOpaque const):
(WebCore::CSSLinearGradientValue::createGradient):
(WebCore::CSSRadialGradientValue::createGradient):
* css/CSSGradientValue.h:
* css/CSSImageGeneratorValue.cpp:
(WebCore::CSSImageGeneratorValue::knownToBeOpaque const):
* css/CSSImageValue.cpp:
(WebCore::CSSImageValue::knownToBeOpaque const):
* css/CSSImageValue.h:

LayoutTests:

* css3/color-filters/color-filter-gradients-expected.html: Added.
* css3/color-filters/color-filter-gradients.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@231105 268f45cc-cd09-0410-ab3c-d52691b4dbfc