Bug 165948 – Skia lighter wght variation looks bolder than regular

• Component: Text
• Status: VERIFIED FIXED

[Dominik Röttsches (drott)]

Created attachment 297310 [details]
WebKit Nightly r209896 too light regular Skia rendering

In WebKit Nightly r209896 and https://jsfiddle.net/whLa398b/1/ I get a lighter rendering for the regular variant at 1.0 wght value than at the lighter wght variant at 0.8 value. This was discovered while I was using the modified blog post jsfiddle as an example: https://jsfiddle.net/0v1wkpmz/ 

If I am not mistaken, the expected result is: The wght 0.8 instance should look lighter. Fonttools tells me both axes in Skia use 1.0 as their default value, so does the "Regular" named instance.

[Dominik Röttsches (drott)]

Created attachment 297311 [details]
My unreleased Chrome dev version, for comparison

[Myles C. Maxfield]

Yes, CoreText has a bug where applying the default value of a variation axis via the API causes, in reality, the minimum value of that axis to be applied. I need to work around this in WebKit.

[Myles C. Maxfield]

*** Bug 163790 has been marked as a duplicate of this bug. ***

[Myles C. Maxfield]

Created attachment 297531 [details]
Patch

[Myles C. Maxfield]

Comment on attachment 297531 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=297531&action=review

> Source/WebCore/platform/graphics/cocoa/FontCacheCoreText.cpp:473
> +        // FIXME: Remove when <rdar://problem/28707822> is fixed

This is not indented correctly.

[Myles C. Maxfield]

Created attachment 297533 [details]
Patch for committing

[Build Bot]

Comment on attachment 297531 [details]
Patch

Attachment 297531 [details] did not pass mac-debug-ews (mac):
Output: http://webkit-queues.webkit.org/results/2760321

New failing tests:
imported/w3c/web-platform-tests/IndexedDB/interfaces.worker.html

[Build Bot]

Created attachment 297537 [details]
Archive of layout-test-results from ews113 for mac-elcapitan

The attached test failures were seen while running run-webkit-tests on the mac-debug-ews.
Bot: ews113  Port: mac-elcapitan  Platform: Mac OS X 10.11.6

[Build Bot]

Comment on attachment 297533 [details]
Patch for committing

Attachment 297533 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: http://webkit-queues.webkit.org/results/2760351

New failing tests:
fast/text/variations/outofbounds.html

[Build Bot]

Created attachment 297539 [details]
Archive of layout-test-results from ews124 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews124  Port: ios-simulator-wk2  Platform: Mac OS X 10.11.6

[Build Bot]

Comment on attachment 297531 [details]
Patch

Attachment 297531 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: http://webkit-queues.webkit.org/results/2760383

New failing tests:
fast/text/variations/outofbounds.html

[Build Bot]

Created attachment 297540 [details]
Archive of layout-test-results from ews123 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews123  Port: ios-simulator-wk2  Platform: Mac OS X 10.11.6

[Myles C. Maxfield]

Committed r210054: <http://trac.webkit.org/changeset/210054>

[Dominik Röttsches (drott)]

Nightly only contained revisions up until r210021, I'll check tomorrow.

[Myles C. Maxfield]

(In reply to comment #14)
> Nightly only contained revisions up until r210021, I'll check tomorrow.

Any word?

[Dominik Röttsches (drott)]

Created attachment 298100 [details]
Screenshot Safari r210314 and Chromium ToT

[Dominik Röttsches (drott)]

Looks good to me on r210314, thanks!