[Bug 1659] New: [IcedTea7] OpenJDK 7 returns incorrect TrueType font metrics when bold style is set

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=1659

            Bug ID: 1659
           Summary: [IcedTea7] OpenJDK 7 returns incorrect TrueType font
                    metrics when bold style is set
    Classification: Unclassified
           Product: IcedTea
           Version: 7-hg
          Hardware: all
                OS: All
            Status: NEW
          Severity: normal
          Priority: P3
         Component: IcedTea
          Assignee: gnu.andrew at redhat.com
          Reporter: suenaga.yasumasa at lab.ntt.co.jp
                CC: unassigned at icedtea.classpath.org

Created attachment 1014
  --> http://icedtea.classpath.org/bugzilla/attachment.cgi?id=1014&action=edit
Patch for this issue

This bug is related to:
  Bug 1435: [IcedTea7] OpenJDK 7 returns incorrect TrueType font metrics


My customer encountered this issue.
Status of this issue is resolved. However, if bold style is set,
this issue is appeared yet.

I read source code of "freetype-2.5.0-4.fc20" .
Bold style should affect Font Glyph only. However, current implementation
of OpenJDK affects FontFace. Thus value of Ascent/Descent is incorrect.


I've made patch for this issue as "fontScaler.patch" .
This patch works fine for my environment.


This issue is also booked in JBS as:
  JDK-8017773: OpenJDK7 returns incorrect TrueType font metrics
  https://bugs.openjdk.java.net/browse/JDK-8017773

I think my patch will be fixed this issue too.


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

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