AAT Insertion only works in state 0
| Originator: | sascha.brawer | ||
| Number: | rdar://44902550 | Date Originated: | 2018-10-01 |
| Status: | Open | Resolved: | |
| Product: | macOS | Product Version: | |
| Classification: | Reproducible: |
Area: Core Graphics CoreText on macOS 10.13.6 seems to handle AAT insertions only when the font’s finite-state machine is in state 0. See test case MORX-33 in Unicode’s test suite for text rendering engines. https://rawgit.com/unicode-org/text-rendering-tests/master/reports/CoreText.html#MORX-33 By comparison, HarfBuzz behaves as expected: https://rawgit.com/unicode-org/text-rendering-tests/master/reports/FreeStack.html#MORX-33 To reproduce, render the string “haha” with this test font: https://rawgit.com/unicode-org/text-rendering-tests/master/fonts/TestMORXThirtythree.ttf
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