-webkit-cross-fade paints SVGs at full opacity during cross-fade

[Tim Horton]

Cross-fade is broken with SVGImages, because SVGImage resets the context's opacity before the image is drawn, so the opacity that we set does not take effect.

We can use a transparency layer to get around this, but due to the performance cost, we should only do this when painting an SVG image.

I have a patch.

<rdar://problem/13973162>

[Tim Horton]

Created attachment 213572 [details]
patch

[WebKit Commit Bot]

Attachment 213572 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'LayoutTests/ChangeLog', u'LayoutTests/css3/images/cross-fade-svg-with-opacity-expected.html', u'LayoutTests/css3/images/cross-fade-svg-with-opacity.html', u'Source/WebCore/ChangeLog', u'Source/WebCore/platform/graphics/CrossfadeGeneratedImage.cpp']" exit_code: 1
Source/WebCore/platform/graphics/CrossfadeGeneratedImage.cpp:64:  Weird number of spaces at line-start.  Are you using a 4-space indent?  [whitespace/indent] [3]
Total errors found: 1 in 5 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Tim Horton]

Comment on attachment 213572 [details]
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=213572&action=review

>> Source/WebCore/platform/graphics/CrossfadeGeneratedImage.cpp:64
>> +                                 static_cast<float>(targetSize.height()) / imageSize.height()));
> 
> Weird number of spaces at line-start.  Are you using a 4-space indent?  [whitespace/indent] [3]

Hmm, I just moved this, but it does look wrong.

[Tim Horton]

http://trac.webkit.org/changeset/157045