reactos/lib/3rdparty/freetype/include/internal/ftgloadr.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftgloadr.h                                                             */
   4 /*                                                                         */
   5 /*    The FreeType glyph loader (specification).                           */
   6 /*                                                                         */
   7 /*  Copyright 2002, 2003, 2005, 2006 by                                    */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg                       */
   9 /*                                                                         */
  10 /*  This file is part of the FreeType project, and may only be used,       */
  11 /*  modified, and distributed under the terms of the FreeType project      */
  12 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  13 /*  this file you indicate that you have read the license and              */
  14 /*  understand and accept it fully.                                        */
  15 /*                                                                         */
  16 /***************************************************************************/
  17
  18
  19 #ifndef __FTGLOADR_H__
  20 #define __FTGLOADR_H__
  21
  22
  23 #include <ft2build.h>
  24 #include FT_FREETYPE_H
  25
  26
  27 FT_BEGIN_HEADER
  28
  29
  30   /*************************************************************************/
  31   /*                                                                       */
  32   /* <Struct>                                                              */
  33   /*    FT_GlyphLoader                                                     */
  34   /*                                                                       */
  35   /* <Description>                                                         */
  36   /*    The glyph loader is an internal object used to load several glyphs */
  37   /*    together (for example, in the case of composites).                 */
  38   /*                                                                       */
  39   /* <Note>                                                                */
  40   /*    The glyph loader implementation is not part of the high-level API, */
  41   /*    hence the forward structure declaration.                           */
  42   /*                                                                       */
  43   typedef struct FT_GlyphLoaderRec_*  FT_GlyphLoader ;
  44
  45
  46 #if 0  /* moved to freetype.h in version 2.2 */
  47 #define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS          1
  48 #define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES      2
  49 #define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID        4
  50 #define FT_SUBGLYPH_FLAG_SCALE                   8
  51 #define FT_SUBGLYPH_FLAG_XY_SCALE             0x40
  52 #define FT_SUBGLYPH_FLAG_2X2                  0x80
  53 #define FT_SUBGLYPH_FLAG_USE_MY_METRICS      0x200
  54 #endif
  55
  56
  57   typedef struct  FT_SubGlyphRec_
  58   {
  59     FT_Int     index;
  60     FT_UShort  flags;
  61     FT_Int     arg1;
  62     FT_Int     arg2;
  63     FT_Matrix  transform;
  64
  65   } FT_SubGlyphRec;
  66
  67
  68   typedef struct  FT_GlyphLoadRec_
  69   {
  70     FT_Outline   outline;       /* outline                   */
  71     FT_Vector*   extra_points;  /* extra points table        */
  72     FT_Vector*   extra_points2; /* second extra points table */
  73     FT_UInt      num_subglyphs; /* number of subglyphs       */
  74     FT_SubGlyph  subglyphs;     /* subglyphs                 */
  75
  76   } FT_GlyphLoadRec, *FT_GlyphLoad;
  77
  78
  79   typedef struct  FT_GlyphLoaderRec_
  80   {
  81     FT_Memory        memory;
  82     FT_UInt          max_points;
  83     FT_UInt          max_contours;
  84     FT_UInt          max_subglyphs;
  85     FT_Bool          use_extra;
  86
  87     FT_GlyphLoadRec  base;
  88     FT_GlyphLoadRec  current;
  89
  90     void*            other;            /* for possible future extension? */
  91
  92   } FT_GlyphLoaderRec;
  93
  94
  95   /* create new empty glyph loader */
  96   FT_BASE( FT_Error )
  97   FT_GlyphLoader_New( FT_Memory        memory,
  98                       FT_GlyphLoader  *aloader );
  99
 100   /* add an extra points table to a glyph loader */
 101   FT_BASE( FT_Error )
 102   FT_GlyphLoader_CreateExtra( FT_GlyphLoader  loader );
 103
 104   /* destroy a glyph loader */
 105   FT_BASE( void )
 106   FT_GlyphLoader_Done( FT_GlyphLoader  loader );
 107
 108   /* reset a glyph loader (frees everything int it) */
 109   FT_BASE( void )
 110   FT_GlyphLoader_Reset( FT_GlyphLoader  loader );
 111
 112   /* rewind a glyph loader */
 113   FT_BASE( void )
 114   FT_GlyphLoader_Rewind( FT_GlyphLoader  loader );
 115
 116   /* check that there is enough space to add `n_points' and `n_contours' */
 117   /* to the glyph loader                                                 */
 118   FT_BASE( FT_Error )
 119   FT_GlyphLoader_CheckPoints( FT_GlyphLoader  loader,
 120                               FT_UInt         n_points,
 121                               FT_UInt         n_contours );
 122
 123
 124 #define FT_GLYPHLOADER_CHECK_P( _loader, _count )                         \
 125    ( (_count) == 0 || ((_loader)->base.outline.n_points    +              \
 126                        (_loader)->current.outline.n_points +              \
 127                        (unsigned long)(_count)) <= (_loader)->max_points )
 128
 129 #define FT_GLYPHLOADER_CHECK_C( _loader, _count )                          \
 130   ( (_count) == 0 || ((_loader)->base.outline.n_contours    +              \
 131                       (_loader)->current.outline.n_contours +              \
 132                       (unsigned long)(_count)) <= (_loader)->max_contours )
 133
 134 #define FT_GLYPHLOADER_CHECK_POINTS( _loader, _points,_contours )      \
 135   ( ( FT_GLYPHLOADER_CHECK_P( _loader, _points )   &&                  \
 136       FT_GLYPHLOADER_CHECK_C( _loader, _contours ) )                   \
 137     ? 0                                                                \
 138     : FT_GlyphLoader_CheckPoints( (_loader), (_points), (_contours) ) )
 139
 140
 141   /* check that there is enough space to add `n_subs' sub-glyphs to */
 142   /* a glyph loader                                                 */
 143   FT_BASE( FT_Error )
 144   FT_GlyphLoader_CheckSubGlyphs( FT_GlyphLoader  loader,
 145                                  FT_UInt         n_subs );
 146
 147   /* prepare a glyph loader, i.e. empty the current glyph */
 148   FT_BASE( void )
 149   FT_GlyphLoader_Prepare( FT_GlyphLoader  loader );
 150
 151   /* add the current glyph to the base glyph */
 152   FT_BASE( void )
 153   FT_GlyphLoader_Add( FT_GlyphLoader  loader );
 154
 155   /* copy points from one glyph loader to another */
 156   FT_BASE( FT_Error )
 157   FT_GlyphLoader_CopyPoints( FT_GlyphLoader  target,
 158                              FT_GlyphLoader  source );
 159
 160  /* */
 161
 162
 163 FT_END_HEADER
 164
 165 #endif /* __FTGLOADR_H__ */
 166
 167
 168 /* END */