Re: [ft] FT_Open_Face

[suzuki toshiya]

Ahhh,,, excuse me, are you trying to develop your own stream driver,
for OpenSSL encrypted data, then got touble? If so, I'm sorry for
posting irrelevant messages!

Regards,
mpsuzuki

On 10/04/2013 12:51 PM, Ztatik Light wrote:
> yes, i can... i have tested, all plain .ttf files work fine with 
> FT_New_Face... but now i'm using an encrypted OpenSSL I/O stream so I need to 
> use FT_Open_Face and supply the read function which also does seeking, but 
> i'm guessing something's wrong with my seeking
> 
> 
> On Thu, Oct 3, 2013 at 10:35 PM, suzuki toshiya <address@hidden 
> <mailto:address@hidden>> wrote:
> 
>     I wanted you to execute ftdump onto some font file, and check
>     if the library is corrected built and able to parse some font file...
>     You say that your software using FreeType2 is very complicated
>     and could not pass arbitrary-chosen font file to your software?
> 
>     Regards,
>     mpsuzuki
> 
>     On 10/04/2013 11:48 AM, Ztatik Light wrote:
>      > I'm only trying one font, it's encrypted with OpenSSL which is why I'm 
> using FT_Open_Face, to stream from SSL's decrypt I/O stream... One specific 
> thing I don't understand for example is that it seems between each and every 
> substantial read call, a read call with `count` and `offset` both 0 are 
> called, and i'm not 100% sure what should be happening in that case.
>      >
>      >
>      > On Thu, Oct 3, 2013 at 9:39 PM, suzuki toshiya <address@hidden 
> <mailto:address@hidden> <mailto:address@hidden <mailto:address@hidden>>> 
> wrote:
>      >
>      >     Hi,
>      >
>      >     I guess you're afraid that some bugs exist in the stream driver
>      >     of the FreeType2. You could load no font? Or, you could load
>      >     some fonts, but could not other fonts?
>      >
>      >     If FT_Open_Face() is already failed, the glyph loading should
>      >     not be tried anymore. According to fterrdef.h, error code 2
>      >     (from FT_Open_Face()) means the unknown font file format.
>      >     So... if you could load some fonts but could not load other,
>      >     please clarify the font file you've tried. If it's officially
>      >     provided freely (not piracy), or bundled to the widely available
>      >     products, no need to post the font file in this list, please
>      >     clarify how to access it.
>      >
>      >     If it's difficult (e.g. commercial font, or embedded font in
>      >     the confidential document etc), please try the tracing of 
> FreeType2.
>      >     The method how to build the FreeType2 with debugging and tracing
>      >     message is written in doc/DEBUG.
>      >
>      >     Regards,
>      >     mpsuzuki
>      >
>      >     On 10/04/2013 11:15 AM, Ztatik Light wrote:
>      >      > I'm having trouble implementing the read function passed into 
> FT_Open_Face through it's `args` flags...
>      >      >
>      >      > Now, the function is being *called* correctly, because I put a 
> print statement inside and see it printing out. It even reads some data. But 
> FT_Open_Face returns 2, and the glyph loading fails...
>      >      >
>      >      > I suspect it has something to do with the case of `count` being 
> 0 and it needing to seek.
>      >      >
>      >      > The doc mentions:
>      >      >
>      >      > "This function might be called to perform a seek or skip 
> operation with a ‘count’ of 0."
>      >      >
>      >      >
>      >      > But . . . What if `offset` is also zero? Does this mean seek to 
> beginning of the file, or just return 0?
>      >      >
>      >      > An example of an implemented read function with proper seeking 
> and all would be the most beneficial in this case..
>      >      >
>      >      >
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