Re: RFR: 8378623: Use unique font names in FormatCharAdvanceTest

Prasanta Sadhukhan Wed, 25 Feb 2026 19:35:58 -0800

On Wed, 25 Feb 2026 05:36:25 GMT, Jayathirth D V <[email protected]> wrote:


> While working on [JDK-8373290](https://bugs.openjdk.org/browse/JDK-8373290), 
> it is noticed that with FreeType update 
> java/awt/font/TextLayout/FormatCharAdvanceTest.java is failing.
> 
> On more analysis it is found that this Test is not using appropriate 
> FontMetrics under FontMetrics.stringWidth() and Font.getStringBounds("AB", 
> frc) code path. Test continues to use Type1 FontMetrics for TTF font.
> 
> Freetype update just revealed this issue as "width" slightly changes between 
> the Type1 and TTF font used in this test(This is happening because of 
> hinting/rounding change in FreeType update). We are not seeing any change of 
> Metrics for other Physical(Helvetica.ttf) or Logical(Dialog) fonts.
> 
> We have separate bug 
> [JDK-8378622](https://bugs.openjdk.org/browse/JDK-8378622) to analyse and fix 
> FontMetrics caching issue. We are updating FormatCharAdvanceTest to use 
> unique "font name" for both Type1 and TTF font to pick valid FontMetrics and 
> make this test work properly. Changing the font name will not affect the 
> purpose of this test.

test/jdk/java/awt/font/TextLayout/FormatCharAdvanceTest.java line 26:

> 24: /*
> 25:  * @test
> 26:  * @bug 8208377 6562489 8270265 8356803 8356812 4517298 8378623

we dont add test fix bugid to the tag, only product fix bugid

test/jdk/java/awt/font/TextLayout/FormatCharAdvanceTest.java line 132:

> 130:      * </pre>
> 131:      */
> 132:     private static final String TTF_BYTES = 
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Did you change the ttf bytes too?

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/29910#discussion_r2856689644
PR Review Comment: https://git.openjdk.org/jdk/pull/29910#discussion_r2856692401

Re: RFR: 8378623: Use unique font names in FormatCharAdvanceTest

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