Bug 171423

Summary: Variable GPOS mark positions not working
Product: WebKit Reporter: Dominik Röttsches (drott) <d-r>
Component: TextAssignee: Nobody <webkit-unassigned>
Status: RESOLVED MOVED    
Severity: Normal CC: bfulgham, mmaxfield, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Variable GPOS test with shifting mark anchor none

Dominik Röttsches (drott)
Reported 2017-04-28 01:45:14 PDT
Created attachment 308511 [details] Variable GPOS test with shifting mark anchor This reftest using an additional axis VM2B in the variabletest_box font fails to work in WebKit nightly r215833. However, the *_expected.html file renders correctly. The VM2B axis of this font shifts the mark anchor to the left, leading to the combining mark SQUARE BELOW shifting right when the axis parameter is adjusted from 0 to 1000. As the reference in the ref test, the font also contains two additional glyphs N and O, which have fixed base anchors at the middle and right position. A rendering of the M character showing "m2b pos", followed by COMBINING SQUARE BELOW with VM2B 0, 500, 1000 applied must thus be equal to renderings of the N and O glyph with no VM2B variation values applied.
Attachments
Variable GPOS test with shifting mark anchor (3.61 KB, application/zip)
2017-04-28 01:45 PDT, Dominik Röttsches (drott) 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2017-04-28 13:37:32 PDT
<rdar://problem/31894642>
Brent Fulgham
Comment 2 2022-02-10 19:38:38 PST
The fix for this issue was needed outside the WebKit project, therefore this is being resolved as 'Moved'. This should now be fixed in shipping software.
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