Code Review Request For RT-40245: Regression: Mac (prism-sw) rendering is corrupted

[Chien Yang]

Hi Kevin and Jim,

Please review the proposed fix:

JIRA: https://javafx-jira.kenai.com/browse/RT-40245
Webrev: http://cr.openjdk.java.net/~ckyang/RT-40245/webrev.00/

Thanks,
- Chien