[Bug 6715] Text rendering problems in X-Change 3

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=6715

Sagawa <sagawa.aki+winebugs at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |sagawa.aki+winebugs at gmail.c
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--- Comment #32 from Sagawa <sagawa.aki+winebugs at gmail.com> 2013-08-21 08:39:11 CDT ---
I can confirm the issue with the Japanese demo version [1].

In my research, this issue is a bug in the x-change 3, related to
anti-aliasing. In the English version screenshot [2], pink shadow is shown
around the text.
You can turn off anti-aliasing as the workaround.

In detail, following proceedings are done in the software,
1) white texts are rendered into on memory bitmap, which background color is
#FF00FF (=pink). When anti-aliasing rendering is enabled, glyph edges are
interpolated color between white and pink.
2) each glyph is copied from the memory which masked with pure pink. Only pure
pink color was removed in this step.
3) As edges are not pure pink, they are left and shown like shadow in the
message box.

This issue doesn't happen in Japanese Windows. Why? Because anti-aliasing for
`MS Gothic' is disabled when ppem < 24 due to its GASP table.

[1] http://demo.d-dream.com/00001331/Xchange3(Digest).lzh (144MB)
    SHA1:60dba5412848839559d64a2b3f9c12761a352967
[2]
http://squarefaction.ru/files/game/1619/gallery/1f5bd53ece8106ef1f28b8d77245a2fc.jpg
    linked from http://squarefaction.ru/game/x-change-3

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