src/freetype/type1z/z1gload.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  z1gload.h                                                              */
   4 /*                                                                         */
   5 /*    Experimental Type 1 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 Z1GLOAD_H
  20 #define Z1GLOAD_H
  21
  22
  23 #ifdef FT_FLAT_COMPILE
  24
  25 #include "z1objs.h"
  26
  27 #else
  28
  29 #include <type1z/z1objs.h>
  30
  31 #endif
  32
  33
  34 #ifdef __cplusplus
  35   extern "C" {
  36 #endif
  37
  38
  39   /*************************************************************************/
  40   /*                                                                       */
  41   /* <Structure>                                                           */
  42   /*    Z1_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   /*    loader       :: The current glyph loader.                          */
  55   /*                                                                       */
  56   /*    current      :: The current glyph outline.                         */
  57   /*                                                                       */
  58   /*    base         :: The base glyph outline.                            */
  59   /*                                                                       */
  60   /*    last         :: The last point position.                           */
  61   /*                                                                       */
  62   /*    scale_x      :: The horizontal scale (FUnits to sub-pixels).       */
  63   /*                                                                       */
  64   /*    scale_y      :: The vertical scale (FUnits to sub-pixels).         */
  65   /*                                                                       */
  66   /*    pos_x        :: The horizontal translation (for composite glyphs). */
  67   /*                                                                       */
  68   /*    pos_y        :: The vertical translation (for composite glyphs).   */
  69   /*                                                                       */
  70   /*    left_bearing :: The left side bearing point.                       */
  71   /*                                                                       */
  72   /*    advance      :: The horizontal advance vector.                     */
  73   /*                                                                       */
  74   /*    no_recurse   ::                                                    */
  75   /*                                                                       */
  76   /*    bbox         :: The glyph's bounding box.                          */
  77   /*                                                                       */
  78   /*    path_begun   :: A flag which indicates that a new path has begun.  */
  79   /*                                                                       */
  80   /*    load_points  :: A flag which indicates, if not set, that no points */
  81   /*                    are loaded.                                        */
  82   /*                                                                       */
  83   /*    error        :: The current error code.                            */
  84   /*                                                                       */
  85   /*    metrics_only :: A flag whether to compute metrics only.            */
  86   /*                                                                       */
  87   typedef struct  Z1_Builder_
  88   {
  89     FT_Memory        memory;
  90     T1_Face          face;
  91     Z1_GlyphSlot     glyph;
  92     FT_GlyphLoader*  loader;
  93
  94     FT_Outline*      current;       /* the current glyph outline   */
  95     FT_Outline*      base;          /* the composite glyph outline */
  96
  97     FT_Vector        last;
  98
  99     FT_Fixed         scale_x;
 100     FT_Fixed         scale_y;
 101
 102     FT_Pos           pos_x;
 103     FT_Pos           pos_y;
 104
 105     FT_Vector        left_bearing;
 106     FT_Vector        advance;
 107
 108     FT_BBox          bbox;          /* bounding box */
 109     FT_Bool          path_begun;
 110     FT_Bool          load_points;
 111     FT_Bool          no_recurse;
 112
 113     FT_Error         error;         /* only used for memory errors */
 114     FT_Bool          metrics_only;
 115
 116   } Z1_Builder;
 117
 118
 119   /* execution context charstring zone */
 120   typedef struct  Z1_Decoder_Zone_
 121   {
 122     FT_Byte*  base;
 123     FT_Byte*  limit;
 124     FT_Byte*  cursor;
 125
 126   } Z1_Decoder_Zone;
 127
 128
 129   typedef struct  Z1_Decoder_
 130   {
 131     Z1_Builder        builder;
 132
 133     FT_Int            stack[T1_MAX_CHARSTRINGS_OPERANDS];
 134     FT_Int*           top;
 135
 136     Z1_Decoder_Zone   zones[T1_MAX_SUBRS_CALLS + 1];
 137     Z1_Decoder_Zone*  zone;
 138
 139     FT_Int            flex_state;
 140     FT_Int            num_flex_vectors;
 141     FT_Vector         flex_vectors[7];
 142
 143     T1_Blend*         blend;  /* for multiple masters */
 144
 145   } Z1_Decoder;
 146
 147
 148   LOCAL_DEF
 149   void  Z1_Init_Builder( Z1_Builder*   builder,
 150                          T1_Face       face,
 151                          Z1_Size       size,
 152                          Z1_GlyphSlot  glyph );
 153
 154   LOCAL_DEF
 155   void  Z1_Done_Builder( Z1_Builder*  builder );
 156
 157   LOCAL_DEF
 158   void  Z1_Init_Decoder( Z1_Decoder*  decoder );
 159
 160   LOCAL_DEF
 161   FT_Error  Z1_Compute_Max_Advance( T1_Face  face,
 162                                     FT_Int*  max_advance );
 163
 164   LOCAL_DEF
 165   FT_Error   Z1_Parse_CharStrings( Z1_Decoder*  decoder,
 166                                    FT_Byte*     charstring_base,
 167                                    FT_Int       charstring_len,
 168                                    FT_Int       num_subrs,
 169                                    FT_Byte**    subrs_base,
 170                                    FT_Int*      subrs_len );
 171
 172   LOCAL_DEF
 173   FT_Error  Z1_Load_Glyph( Z1_GlyphSlot  glyph,
 174                            Z1_Size       size,
 175                            FT_Int        glyph_index,
 176                            FT_Int        load_flags );
 177
 178
 179 #ifdef __cplusplus
 180   }
 181 #endif
 182
 183
 184 #endif /* Z1GLOAD_H */
 185
 186
 187 /* END */