thirdparty/freetype-2.3.12/src/cff/cffgload.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  cffgload.h                                                             */
   4 /*                                                                         */
   5 /*    OpenType Glyph Loader (specification).                               */
   6 /*                                                                         */
   7 /*  Copyright 1996-2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009 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 __CFFGLOAD_H__
  20 #define __CFFGLOAD_H__
  21
  22
  23 #include <ft2build.h>
  24 #include FT_FREETYPE_H
  25 #include "cffobjs.h"
  26
  27
  28 FT_BEGIN_HEADER
  29
  30
  31 #define CFF_MAX_OPERANDS        48
  32 #define CFF_MAX_SUBRS_CALLS     32
  33 #define CFF_MAX_TRANS_ELEMENTS  32
  34
  35
  36   /*************************************************************************/
  37   /*                                                                       */
  38   /* <Structure>                                                           */
  39   /*    CFF_Builder                                                        */
  40   /*                                                                       */
  41   /* <Description>                                                         */
  42   /*     A structure used during glyph loading to store its outline.       */
  43   /*                                                                       */
  44   /* <Fields>                                                              */
  45   /*    memory        :: The current memory object.                        */
  46   /*                                                                       */
  47   /*    face          :: The current face object.                          */
  48   /*                                                                       */
  49   /*    glyph         :: The current glyph slot.                           */
  50   /*                                                                       */
  51   /*    loader        :: The current glyph loader.                         */
  52   /*                                                                       */
  53   /*    base          :: The base glyph outline.                           */
  54   /*                                                                       */
  55   /*    current       :: The current glyph outline.                        */
  56   /*                                                                       */
  57   /*    pos_x         :: The horizontal translation (if composite glyph).  */
  58   /*                                                                       */
  59   /*    pos_y         :: The vertical translation (if composite glyph).    */
  60   /*                                                                       */
  61   /*    left_bearing  :: The left side bearing point.                      */
  62   /*                                                                       */
  63   /*    advance       :: The horizontal advance vector.                    */
  64   /*                                                                       */
  65   /*    bbox          :: Unused.                                           */
  66   /*                                                                       */
  67   /*    path_begun    :: A flag which indicates that a new path has begun. */
  68   /*                                                                       */
  69   /*    load_points   :: If this flag is not set, no points are loaded.    */
  70   /*                                                                       */
  71   /*    no_recurse    :: Set but not used.                                 */
  72   /*                                                                       */
  73   /*    metrics_only  :: A boolean indicating that we only want to compute */
  74   /*                     the metrics of a given glyph, not load all of its */
  75   /*                     points.                                           */
  76   /*                                                                       */
  77   /*    hints_funcs   :: Auxiliary pointer for hinting.                    */
  78   /*                                                                       */
  79   /*    hints_globals :: Auxiliary pointer for hinting.                    */
  80   /*                                                                       */
  81   typedef struct  CFF_Builder_
  82   {
  83     FT_Memory       memory;
  84     TT_Face         face;
  85     CFF_GlyphSlot   glyph;
  86     FT_GlyphLoader  loader;
  87     FT_Outline*     base;
  88     FT_Outline*     current;
  89
  90     FT_Pos          pos_x;
  91     FT_Pos          pos_y;
  92
  93     FT_Vector       left_bearing;
  94     FT_Vector       advance;
  95
  96     FT_BBox         bbox;          /* bounding box */
  97     FT_Bool         path_begun;
  98     FT_Bool         load_points;
  99     FT_Bool         no_recurse;
 100
 101     FT_Bool         metrics_only;
 102
 103     void*           hints_funcs;    /* hinter-specific */
 104     void*           hints_globals;  /* hinter-specific */
 105
 106   } CFF_Builder;
 107
 108
 109   /* execution context charstring zone */
 110
 111   typedef struct  CFF_Decoder_Zone_
 112   {
 113     FT_Byte*  base;
 114     FT_Byte*  limit;
 115     FT_Byte*  cursor;
 116
 117   } CFF_Decoder_Zone;
 118
 119
 120   typedef struct  CFF_Decoder_
 121   {
 122     CFF_Builder        builder;
 123     CFF_Font           cff;
 124
 125     FT_Fixed           stack[CFF_MAX_OPERANDS + 1];
 126     FT_Fixed*          top;
 127
 128     CFF_Decoder_Zone   zones[CFF_MAX_SUBRS_CALLS + 1];
 129     CFF_Decoder_Zone*  zone;
 130
 131     FT_Int             flex_state;
 132     FT_Int             num_flex_vectors;
 133     FT_Vector          flex_vectors[7];
 134
 135     FT_Pos             glyph_width;
 136     FT_Pos             nominal_width;
 137
 138     FT_Bool            read_width;
 139     FT_Bool            width_only;
 140     FT_Int             num_hints;
 141     FT_Fixed           buildchar[CFF_MAX_TRANS_ELEMENTS];
 142
 143     FT_UInt            num_locals;
 144     FT_UInt            num_globals;
 145
 146     FT_Int             locals_bias;
 147     FT_Int             globals_bias;
 148
 149     FT_Byte**          locals;
 150     FT_Byte**          globals;
 151
 152     FT_Byte**          glyph_names;   /* for pure CFF fonts only  */
 153     FT_UInt            num_glyphs;    /* number of glyphs in font */
 154
 155     FT_Render_Mode     hint_mode;
 156
 157     FT_Bool            seac;
 158
 159   } CFF_Decoder;
 160
 161
 162   FT_LOCAL( void )
 163   cff_decoder_init( CFF_Decoder*    decoder,
 164                     TT_Face         face,
 165                     CFF_Size        size,
 166                     CFF_GlyphSlot   slot,
 167                     FT_Bool         hinting,
 168                     FT_Render_Mode  hint_mode );
 169
 170   FT_LOCAL( FT_Error )
 171   cff_decoder_prepare( CFF_Decoder*  decoder,
 172                        CFF_Size      size,
 173                        FT_UInt       glyph_index );
 174
 175 #if 0  /* unused until we support pure CFF fonts */
 176
 177   /* Compute the maximum advance width of a font through quick parsing */
 178   FT_LOCAL( FT_Error )
 179   cff_compute_max_advance( TT_Face  face,
 180                            FT_Int*  max_advance );
 181
 182 #endif /* 0 */
 183
 184   FT_LOCAL( FT_Error )
 185   cff_decoder_parse_charstrings( CFF_Decoder*  decoder,
 186                                  FT_Byte*      charstring_base,
 187                                  FT_ULong      charstring_len );
 188
 189   FT_LOCAL( FT_Error )
 190   cff_slot_load( CFF_GlyphSlot  glyph,
 191                  CFF_Size       size,
 192                  FT_UInt        glyph_index,
 193                  FT_Int32       load_flags );
 194
 195
 196 FT_END_HEADER
 197
 198 #endif /* __CFFGLOAD_H__ */
 199
 200
 201 /* END */