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Re: [ft-devel] Freetype render issue


From: Johnson Y. Yan
Subject: Re: [ft-devel] Freetype render issue
Date: Fri, 5 Jul 2013 18:35:41 +0800


Werner, We use the new CFF engine, the glyph is displayed correct now. Thanks.
 
Johnson Y. Yan

发件人: Werner LEMBERG
发送时间: 2013-06-28 18:50:49
收件人: yinsen_yan
抄送: freetype-devel
主题: Re: [ft-devel] Freetype render issue
 
> An integral sign should be displayed in attachment pdf file.
> Could you help check this issue is caused by freetype?
Indeed, there are rendering issues in the raw CFF font `cmex10'
embedded in the PDF: I get many `stack underflow' tracing messages
using the old CFF engine.  However, if you use the new CFF engine, all
glyphs are displayed correctly.
Note that the `stack underflow' messages are correct actually since
the constructed `cmex10' font is buggy: For example, glyph 5 contains
`vhcurveto' with zero arguments as the very last operator which is
invalid according to the Type 2 specification.  In other words,
FreeType's old CFF engine is correct, and you should fix your
application's CFF builder.
    Werner

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