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

[Yasumasa Suenaga]

Hi all,

The "Fix version" of this issue has been changed into 9 from 8-pool.
Will this issue not be fixed in JDK7/8 ?

I think this issue is bug of OpenJDK implementation.
So this issue should be fixed ASAP.


Yasumasa

On 2014/02/13 16:38, Yasumasa Suenaga wrote:
> 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
>> ----------------