RFR: 8240221: XOR mode rendering option does not work with Texture paint and Gradient Paint

[Ajit Ghaisas]

More details in JBS comments :
https://bugs.openjdk.java.net/browse/JDK-8240221

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Commit messages:
 - texture origin correction

Changes: https://git.openjdk.java.net/lanai/pull/65/files
 Webrev: https://webrevs.openjdk.java.net/lanai/65/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8240221
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/lanai/pull/65.diff
  Fetch: git fetch https://git.openjdk.java.net/lanai pull/65/head:pull/65

PR: https://git.openjdk.java.net/lanai/pull/65