src/freetype/cid/cidgload.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  cidgload.h                                                             */
   4 /*                                                                         */
   5 /*    OpenType Glyph Loader (specification).                               */
   6 /*                                                                         */
   7 /*  Copyright 1996-2000 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 CIDGLOAD_H
  20 #define CIDGLOAD_H
  21
  22
  23 #ifdef FT_FLAT_COMPILE
  24
  25 #include "cidobjs.h"
  26
  27 #else
  28
  29 #include <cid/cidobjs.h>
  30
  31 #endif
  32
  33
  34 #ifdef __cplusplus
  35   extern "C" {
  36 #endif
  37
  38
  39   /*************************************************************************/
  40   /*                                                                       */
  41   /* <Structure>                                                           */
  42   /*    CID_Builder                                                        */
  43   /*                                                                       */
  44   /* <Description>                                                         */
  45   /*     A structure used during glyph loading to store its outline.       */
  46   /*                                                                       */
  47   /* <Fields>                                                              */
  48   /*    memory       :: The current memory object.                         */
  49   /*                                                                       */
  50   /*    face         :: The current face object.                           */
  51   /*                                                                       */
  52   /*    glyph        :: The current glyph slot.                            */
  53   /*                                                                       */
  54   /*    current      :: The current glyph outline.                         */
  55   /*                                                                       */
  56   /*    base         :: The base glyph outline.                            */
  57   /*                                                                       */
  58   /*    max_points   :: maximum points in builder outline                  */
  59   /*                                                                       */
  60   /*    max_contours :: Maximal number of contours in builder outline.     */
  61   /*                                                                       */
  62   /*    last         :: The last point position.                           */
  63   /*                                                                       */
  64   /*    scale_x      :: The horizontal scale (FUnits to sub-pixels).       */
  65   /*                                                                       */
  66   /*    scale_y      :: The vertical scale (FUnits to sub-pixels).         */
  67   /*                                                                       */
  68   /*    pos_x        :: The horizontal translation (if composite glyph).   */
  69   /*                                                                       */
  70   /*    pos_y        :: The vertical translation (if composite glyph).     */
  71   /*                                                                       */
  72   /*    left_bearing :: The left side bearing point.                       */
  73   /*                                                                       */
  74   /*    advance      :: The horizontal advance vector.                     */
  75   /*                                                                       */
  76   /*    bbox         :: Unused.                                            */
  77   /*                                                                       */
  78   /*    path_begun   :: A flag which indicates that a new path has begun.  */
  79   /*                                                                       */
  80   /*    load_points  :: If this flag is not set, no points are loaded.     */
  81   /*                                                                       */
  82   /*    no_recurse   :: Set but not used.                                  */
  83   /*                                                                       */
  84   /*    error        :: An error code that is only used to report memory   */
  85   /*                    allocation problems.                               */
  86   /*                                                                       */
  87   /*    metrics_only :: A boolean indicating that we only want to compute  */
  88   /*                    the metrics of a given glyph, not load all of its  */
  89   /*                    points.                                            */
  90   /*                                                                       */
  91   typedef struct  CID_Builder_
  92   {
  93     FT_Memory        memory;
  94     CID_Face         face;
  95     CID_GlyphSlot    glyph;
  96     FT_GlyphLoader*  loader;
  97     FT_Outline*      base;
  98     FT_Outline*      current;
  99
 100     FT_Vector        last;
 101
 102     FT_Fixed         scale_x;
 103     FT_Fixed         scale_y;
 104
 105     FT_Pos           pos_x;
 106     FT_Pos           pos_y;
 107
 108     FT_Vector        left_bearing;
 109     FT_Vector        advance;
 110
 111     FT_BBox          bbox;          /* bounding box */
 112     FT_Bool          path_begun;
 113     FT_Bool          load_points;
 114     FT_Bool          no_recurse;
 115
 116     FT_Error         error;         /* only used for memory errors */
 117     FT_Bool          metrics_only;
 118
 119   } CID_Builder;
 120
 121
 122   /* execution context charstring zone */
 123
 124   typedef struct  CID_Decoder_Zone_
 125   {
 126     FT_Byte*  base;
 127     FT_Byte*  limit;
 128     FT_Byte*  cursor;
 129
 130   } CID_Decoder_Zone;
 131
 132
 133   typedef struct  CID_Decoder_
 134   {
 135     CID_Builder        builder;
 136
 137     FT_Int             stack[T1_MAX_CHARSTRINGS_OPERANDS];
 138     FT_Int*            top;
 139
 140     CID_Decoder_Zone   zones[T1_MAX_SUBRS_CALLS + 1];
 141     CID_Decoder_Zone*  zone;
 142
 143     FT_Matrix          font_matrix;
 144     CID_Subrs*         subrs;
 145     FT_UInt            lenIV;
 146
 147     FT_Int             flex_state;
 148     FT_Int             num_flex_vectors;
 149     FT_Vector          flex_vectors[7];
 150
 151   } CID_Decoder;
 152
 153
 154   LOCAL_DEF
 155   void  CID_Init_Builder( CID_Builder*   builder,
 156                           CID_Face       face,
 157                           CID_Size       size,
 158                           CID_GlyphSlot  glyph );
 159
 160   LOCAL_DEF
 161   void CID_Done_Builder( CID_Builder*  builder );
 162
 163
 164   LOCAL_DEF
 165   void CID_Init_Decoder( CID_Decoder*  decoder );
 166
 167
 168 #if 0
 169
 170   /* Compute the maximum advance width of a font through quick parsing */
 171   LOCAL_DEF
 172   FT_Error  CID_Compute_Max_Advance( CID_Face  face,
 173                                      FT_Int*   max_advance );
 174
 175 #endif
 176
 177   /* This function is exported, because it is used by the T1Dump utility */
 178   LOCAL_DEF
 179   FT_Error  CID_Parse_CharStrings( CID_Decoder*  decoder,
 180                                    FT_Byte*      charstring_base,
 181                                    FT_Int        charstring_len );
 182
 183   LOCAL_DEF
 184   FT_Error  CID_Load_Glyph( CID_GlyphSlot  glyph,
 185                             CID_Size       size,
 186                             FT_Int         glyph_index,
 187                             FT_Int         load_flags );
 188
 189
 190 #ifdef __cplusplus
 191   }
 192 #endif
 193
 194
 195 #endif /* CIDGLOAD_H */
 196
 197
 198 /* END */