Re: A patch for enforcing double-width CJK character display

[黄建忠]

FRAME_COLUMN_WIDTH and FRAME_SPACE_WIDTH never changed, it only be 
initialized when first font loaded.

Here is a try to fix "text-scale-increase/decrease" CJK double width issue.

I did not want to change external codes, So introduce a dirty workaround 
and a global static variable "default_font_width", The comments in this 
patch explained the idea and necessity.
"get_default_font_width" function is called by "xftfont_text_extents" 
and "xftfont_draw" to get default font width correctly after scale.

Can anybody provide a clue how to catch the new width of default font 
via FRAME_PTR when scale happened?

于 2012年04月12日 00:16, 黄建忠 写道:
> Thanks for reply.
> I checked with "text-scale-increase" and it did not work.
> When scale happened, the space_width and column_width of frame did not 
> changed, I need find another way to get monospace font width after scale.
> But I think we can store the default font face to every xftfont_info 
> and when scale happened, re-caculate the space width of default face.
> Let me try, thanks for the feedback.
>
>
> 于 2012年04月11日 23:48, Kan-Ru Chen 写道:
> > [ CC:ed emacs-devel ]
> >
> > Hi!
> >
> > 黄建忠<address@hidden>  writes:
> >
> > > Here is a patch to fix double-width issue of CJK fonts when use Xft
> > > backend , just like some terminal did.
> > I like you idea to draw glyphs individually when the font is a CJK font.
> > I didn't realized that when the font changes, XftDrawGlyphs is called
> > again so we have a chance to examine the font!
> >
> > Your patch probably needs some adjust to fit the coding style, but the
> > approach is great! Did you check that it also works with scaled fonts?
> > Like (text-scale-increase) multiple times.
> >
> >    Kanru


--
黄建忠
技术总监
普华基础软件股份有限公司 基础软件事业部

电话：010-82664919-8201
传真：010-82664407
手机：13501162460
网址：http://www.i-soft.com.cn

地址：中国北京市海淀区海淀东三街欧美汇大厦9层
邮编：100080

emacs-cjk-monospace-v5.patch
Description: Text document