Re: [ft-devel] FT_SubGlyphRec in FreeType 2.2 - Amanith

[David Turner]

Hi All,

How can i solve this problem for Amanith ?  Can you freetype2 team
expose it?
    

We can, I think :-)  I just wonder whether it is better to provide a
function, or whether we shall simply move the structure to a public
header.  David?

  

I've implemented a new function yesterday night, it's in the CVS. You'll find the corresponding
freetype.h snippet below. Note that I only exposed the FT_SUBGLYPH_FLAG_XXX macros,
the structure itself is still internal, which gives us room for changes in the future.

Hope this helps,

- David Turner
- The FreeType Project  (www.freetype.org)

----------------------------- cut here ------------------------------------
 /**
  * @macro: FT_SUBGLYPH_FLAG_XXX
  *
  * @description:
  *   a list of constant used to describe each subglyph
  *
  * @values:
  *   FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS ::
  *   FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ::
  *   FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID ::
  *   FT_SUBGLYPH_FLAG_SCALE ::
  *   FT_SUBGLYPH_FLAG_XY_SCALE ::
  *   FT_SUBGLYPH_FLAG_2X2 ::
  *   FT_SUBGLYPH_FLAG_USE_MY_METRICS ::
  */
#define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS          1
#define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES      2
#define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID        4
#define FT_SUBGLYPH_FLAG_SCALE                   8
#define FT_SUBGLYPH_FLAG_XY_SCALE             0x40
#define FT_SUBGLYPH_FLAG_2X2                  0x80
#define FT_SUBGLYPH_FLAG_USE_MY_METRICS      0x200

 /**
  * @func: FT_Get_SubGlyph_Info
  *
  * @description:
  *   a function used to retrieve a description of a given subglyph.
  *   only use it when 'glyph->format' is FT_GLYPH_FORMAT_COMPOSITE, or
  *   an error will be returned
  *
  * @input:
  *   glyph     :: source glyph slot
  *   sub_index :: index of subglyph. must be less than 'glyph->num_subglyphs'
  *
  * @output:
  *   p_index     :: subglyph glyph index
  *   p_flags     :: subglyph flags, see @FT_SUBGLYPH_FLAG_XXX
  *   p_arg1      :: subglyph first argument  (if any)
  *   p_arg2      :: subglyph second argument (if any)
  *   p_transform :: subglyph transform (if any)
  *
  * @return:
  *   error code. 0 means success
  *
  * @note:
  *   the values of *p_arg1, *p_arg2 and *p_transform must be interpreted
  *   depending on the flags returns in *p_flags. See the TrueType specification
  *   for details
  */
  FT_EXPORT( FT_Error )
  FT_Get_SubGlyph_Info( FT_GlyphSlot  glyph,
                        FT_UInt       sub_index,
                        FT_Int       *p_index,
                        FT_UInt      *p_flags,
                        FT_Int       *p_arg1,
                        FT_Int       *p_arg2,
                        FT_Matrix    *p_transform );


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