RFR: 8353230: Emoji rendering regression after JDK-8208377

[Daniel Gredler]

On Mon, 26 May 2025 23:44:34 GMT, Phil Race <prr at openjdk.org> wrote:

>>> @YaaZ Thanks for the information!
>>> 
>>> @prrace Have you had a chance to look at this PR?
>> 
>> It passed all the testing I did. I still need to look hard at the changes.
>
>> @prrace Please don't approve yet. I was able to fix the code conflicts caused by PR #23665, but it looks like the logic does not layer nicely as there is now a test failure on macOS after the merge. I'm having a look and will let you know what I find.
> 
> And indeed the tests just finished and a test (not the new one, a previous one : IgnoredWhitespaceTest.java) failed on macOS x64 and ARM ..
> 
> java.lang.RuntimeException: for text '\t\t\t\t\tXXXXX' with font java.awt.Font[family=Dialog,name=Dialog,style=plain,size=40]: java.awt.Rectangle[x=300,y=271,width=123,height=28] != java.awt.Rectangle[x=365,y=271,width=123,height=28]
> 	at IgnoredWhitespaceTest.assertEqual(IgnoredWhitespaceTest.java:127)
> 	at IgnoredWhitespaceTest.test(IgnoredWhitespaceTest.java:103)
> 	at IgnoredWhitespaceTest.test(IgnoredWhitespaceTest.java:69)
> 	at IgnoredWhitespaceTest.main(IgnoredWhitespaceTest.java:49)
> 	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
> 	at java.base/java.lang.reflect.Method.invoke(Method.java:565)
> 	at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
> 	at java.base/java.lang.Thread.run(Thread.java:1447)
> 
> JavaTest Message: Test threw exception: java.lang.RuntimeException: for text '\t\t\t\t\tXXXXX' with font java.awt.Font[family=Dialog,name=Dialog,style=plain,size=40]: java.awt.Rectangle[x=300,y=271,width=123,height=28] != java.awt.Rectangle[x=365,y=271,width=123,height=28]
> JavaTest Message: shutting down test

@prrace This is ready for review again. I've updated the code to combine nicely with the recent whitespace fixes. The `test/jdk/java/awt/font`, `test/jdk/java/awt/print` and `test/jdk/java/awt/Graphics2D/DrawString` tests all pass for me locally on Windows, Linux and macOS.

Once these changes are integrated it should be relatively simple to address JDK-8356803 ("Test TextLayout/TestControls fails on windows & linux: line and paragraph separator show non-zero advance") and JDK-8356812 ("Create an automated version of TextLayout/TestControls").

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PR Comment: https://git.openjdk.org/jdk/pull/24412#issuecomment-2917521742