[ft] : Microsoft YaHei UI font can't be displayed well

[datao zhang]

Hi all:
when i test the freetype 2.5.3 with microsoft YaHei UI font in 12, 14, 16, 18, 20, 22, 24 pixel size, i find Freetype engine can't handle it correctly in some text size, ex: 12, 14, 24 px size. I have enabled TT_CONFIG_OPTION_BYTECODE_INTERPRETER and TT_CONFIG_OPTION_SUBPIXEL_HINTING. I add an attachment here. The character "据" （unicode: U+636E）used as test case in attachment.
 
Does anyone have idea for this problem? Thanks!
 
Br,
Dean

msyh_ui.png
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