RFR: 8357672: Extreme font sizes can cause font substitution

[Jayathirth D V]

On Mon, 2 Jun 2025 15:05:44 GMT, Phil Race <prr at openjdk.org> wrote:

>> test/jdk/java/awt/FontMetrics/ExtremeFontSizeTest.java line 39:
>> 
>>> 37: /*
>>> 38:  * @test
>>> 39:  * @bug 8328896 8357672
>> 
>> I thought Freetype rasterizer is used on all platforms(Linux, Windows & macOS) by default. Since Freetype is part of JDK.
>> 
>> When i run this test on macOS without any updates from this PR on baseline code, i see that all Fontmetrics in System.out() are non-zero and match before and after extreme parameters. Is this behaviour okay?
>> 
>> I was expecting mismatch in FontMetrics on macOS also.
>> If this test is supposed to catch issues on particular platforms. Do we need to make it specific to some platforms?
>
> On mac, freetype is only used in a few cases - Type1 fonts and Font.loadFont.
> The test is not Linux-specific, nor should it be constrained to Linux, the behaviour it validates applies to all platforms.
> And if you look at the PR that introduced this test, it did update macOS and the test did identify issues on macOS.
> 
> So in short, no changes needed.

Thanks for the clarifications.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25511#discussion_r2121477508