Re: [ft-devel] Something in 2.6.4 broke my windows

[Akira TAGOH]

On Fri, Jul 8, 2016 at 9:51 AM, Behdad Esfahbod
<address@hidden> wrote:
> If I may chime in: fontconfig does indeed specify rendering options.  Werner
> is right that fontconfig itself does not prepare the FT_Face or rendering,
> and that is a problem, because our means adding any new config options to
> fontconfig requires updating all clients.  But fundamentally I think it
> makes sense adding "ft-parameters" to fontconfig, the same way that lcd
> filter is set for example.

I'm not sure if it is/was a good way to have, because it sometimes
confuses it could applies per fonts/FT_Face, despite it is applicable
per FT_Library. maybe fontconfig should improve something to have a
global parameter rather than providing them as in FcPattern.

That said, there are still a problem how those are used is up to
applications. we may need an upper-layered fundamental and lightweight
library to wrap them up and provide proper functionality to
applications.

>
> On Jul 7, 2016 4:34 PM, "Werner LEMBERG" <address@hidden> wrote:
>>
>>
>> >> Just grep'ed through /etc/fonts/conf.d/* , fontconfig allows one to
>> >> switching hinting on/off per font, as well as disabling the use of
>> >> embedded bitmaps, again, per font.
>> >
>> > I think you have a fundamental misunderstanding of how fontconfig
>> > works.  This library is only used to find a best matching font for a
>> > given set of constraints.  Essentially, it returns a string that holds
>> > a font's file name, together with auxiliary information the
>> > application might find useful.  However, it is the application's job
>> > then to process this font name with a call to `FT_Open_Face'!  In
>> > other words, fontconfig has *zero* control how the application loads
>> > the font.  It just provides a suggestion, nothing more.
>> >
>> > The `switch hinting on/off' configuration and similar parameters in
>> > fontconfig influence the auxiliary information returned together with
>> > the matching font, nothing more.  Again, it's the application's job to
>> > adhere to this data while calling `FT_Open_Face'.
>>
>> And even more important: It's also the application's job to call
>> `FT_Init_FreeType' to get a proper `FT_Library' object, and fontconfig
>> doesn't provide any hints how to control FreeType modules.
>>
>>
>>     Werner
>>
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-- 
Akira TAGOH