[Bug 31326] New: ScriptStringOut draw glyphs with wrong pitch when WenQuanYi Micro Hei is used

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=31326

             Bug #: 31326
           Summary: ScriptStringOut draw glyphs with wrong pitch when
                    WenQuanYi Micro Hei is used
           Product: Wine
           Version: 1.5.9
          Platform: x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: usp10
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: fracting at gmail.com
    Classification: Unclassified


Created attachment 41164
  --> http://bugs.winehq.org/attachment.cgi?id=41164
C test case

wine-1.5.9-222-g47b9dd1

ttf-wqy-microhei:
0.2.0-beta-1

WenQuanYi Micro Hei is used as a replacement of SimSun in Ubuntu Wine package,
SimSun is the default GUI font for Chinese version of Wine/Windows.

After 5a45e3474141536b02cfc4e924be3aacbd6ad2c5 ( usp10: Implement GPOS Pair
Adjustment Positioning Subtable. ) , the glyph pitch is wrong when display
string with ScriptStringOut using WenQuanYi Micro Hei.

The simplest way to reproduce this bug is :
1. Make sure WenQuanYi Micro Hei is installed and set as replacement of SimSun 
2. Open wine iexplore with LC_ALL=zh_CN.utf8
3. type some characters into the address bar, for example, '/', '<', '>', '.' 

Expect result:
The pitch between different glyphs should be a suitable value
Actual result:
The pitch between two '/' is larger then normal, pitch between two '>' is even
larger, pitch between two '.' is zero, pitch between two '<' is negative.

winetricks usp10 workaround the bug.

The attachment is a test case, notice that SSA_LINK flag in ScriptStringAnalyse
is necessary to reproduce this bug.

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