[OpenJDK 2D-Dev] JDK-8017773: OpenJDK7 returns incorrect TrueType font metrics

[Yasumasa Suenaga]

Hi all,

I've reported about JDK-8017773 . Have you checked it ?

I guess that many Linux distributor will ship OpenJDK8 after JDK8 GA is released.
If this issue will not fix at JDK8 GA, many users who use 2D on JDK8 may encounter it.

This issue occurs in OpenJDK only.
However, I think there are many users who want to use 2D on OpenJDK.
So I hope to fix this issue ASAP and hope to backport to JDK7.


Please cooperate.

Yasumasa


On 2014/02/03 15:12, Yasumasa Suenaga wrote:
> Hi all,
> 
> My customer encountered this issue.
> I think this issue is caused by Bug 1435 [1] and 1659 [2] in IcedTea.
> 
> I read source code of "freetype-2.5.0-4.fc20" .
> Bold style should affect Font Glyph only. However, current implementation
> of OpenJDK affects Font Face. Thus value of Ascent/Descent is incorrect.
> 
> OracleJDK seems to use sun.font.T2KFontScaler to calculate these values.
> So this issue occurs in OpenJDK only.
> 
> 
> I think we need to merge patches of Bug 1435 and 1659 in IcedTea
> to fix JDK-8017773 .
> 
> Could you merge these patches ?
> Please cooperate.
> 
> 
> Thanks,
> 
> Yasumasa
> 
> 
> [1] http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=1435
> [2] http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=1659
> 
> 
> ------ D E T A I L S ------
> 
> I've created testcase as "JavaApplication1.java" .
> Result as:
> 
> OracleJDK 6 Update 31
> ----------------
> [root at RHEL6-5 font]# /usr/local/jdk1.6.0_31/bin/java JavaApplication1
> JDK: 1.6.0_31
>      VM: Java HotSpot(TM) 64-Bit Server VM
> 
> java.awt.Font[family=IPAMincho,name=IPAMincho,style=plain,size=50]
>       Ascent:  43.99414
>       Descent: 6.0058594
> 
> java.awt.Font[family=IPAMincho,name=IPAMincho,style=bold,size=50]
>       Ascent:  43.99414
>       Descent: 6.0058594
> ----------------
> 
> OpenJDK7 (in RHEL6.5)
> ----------------
> [root at RHEL6-5 font]# java JavaApplication1
> JDK: 1.7.0_45
>      VM: OpenJDK 64-Bit Server VM
> 
> java.awt.Font[family=IPAMincho,name=IPAMincho,style=plain,size=50]
>       Ascent:  43.99414
>       Descent: 6.0058594
> 
> java.awt.Font[family=IPAMincho,name=IPAMincho,style=bold,size=50]
>       Ascent:  45.60547
>       Descent: 4.3945312
> ----------------