TrueType PCLT support Re: Status report on FreeType 2

[Yamano-uchi, Hidetoshi]

Hello,

From: David Turner <address@hidden>
Subject: Status report on FreeType 2
Date: Wed, 03 May 2000 12:18:21 +0200
Message-ID: <address@hidden>

>    - it is now possible to access some TrueType tables like
>      "head", "OS/2", "maxp", "hhea", etc... See "include/tttables.h"
>      to see how to do it

I wrote stuff to acess a TT Open table "pclt" now.
We can obtain this table via FT_Get_Sfnt_Table.

I have some questions about sfnt tables.

* In order to use multilingual face names (french, spanish, Japanese,
etc.), I used TT_Face directory in my bogus codes as follow,

foo(FT_Face* face) {
  TT_Face aface;

  aface = (TT_Face)*face;
}

  It works well on gcc, but is it allowed on another compiler like
CodeWarriors?

* Nowadays, the version of sfnt is fixed integer, 0x0001000.
I don't think the version will be updated in near future, but
Microsoft update some sfnt tables version (e.g. "os2") frequently :-P

There are no API obtaing the sfnt version, I think it is
natural to provide the API.  David, do you think about it?

* On binary compatibility:

  The glibc2 on Linux often breaks binary compatibility.

  On the other hand, NetBSD uses __RENAME macro when some structures
  change for binary compatibility.

--- in /usr/include/errno.h
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
    !defined(_XOPEN_SOURCE)
extern __const int sys_nerr __RENAME(__sys_nerr14);
extern __const char *__const *sys_errlist __RENAME(__sys_errlist14);
#endif
---
--- in /usr/include/sys/cdefs.h ---
#ifdef __GNUC__
#define __RENAME(x)     __asm__(___STRING(_C_LABEL(x)))
#else
#ifdef __lint__
#define __RENAME(x)     __symbolrename(x)
#else
#error "No function renaming possible"
#endif /* __lint__ */
----

  But, it is a good solution only for gcc and gas.

  It is better launching some binary compatibility features in
  FreeType2.  Is there any good solutions about it?

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   Yamano-uchi, Hidetoshi
   address@hidden
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