JDK-8210384 : SunLayoutEngine.isAAT() font is expensive on MacOS
- Type: Bug
- Component: client-libs
- Sub-Component: 2d
- Affected Version: 8,11,12
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- Submitted: 2018-09-04
- Updated: 2020-01-06
- Resolved: 2018-09-09
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| JDK 11 | JDK 12 | JDK 8 |
|---|---|---|
| 11.0.6-oracleFixed | 12 b14Fixed  |
8u202Fixed |
Description
The text layout code passes a boolean flag down to the native layer which is used to inform it how to handle device scales. For sun.font.TrueType instances this is a cheap test, but since on MacOS the CFont class is used, the call is very expensive on Mac, since it makes a native call which uses core text to retrieve the table and constructs a Java byte array and passes it up to Java. All to discover the layout technology of the font. If this can't be made much cheaper, the result should be cached.
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