kc3-lang/freetype/src/type1z/z1gload.h

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• Hash : 728da1c8
  Author :
  Date : 2000-06-27T23:21:51
  

  changed file names and some functions names to avoid conflicts with the "type1" driver.

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• src/type1z/z1gload.h

• /*******************************************************************
   *
   *  t1gload.h                                                   1.0
   *
   *    Type1 Glyph Loader.
   *
   *  Copyright 1996-1998 by
   *  David Turner, Robert Wilhelm, and Werner Lemberg.
   *
   *  This file is part of the FreeType project, and may only be used
   *  modified and distributed under the terms of the FreeType project
   *  license, LICENSE.TXT.  By continuing to use, modify, or distribute
   *  this file you indicate that you have read the license and
   *  understand and accept it fully.
   *
   *
   *  The Type 1 glyph loader uses three distinct objects to build
   *  scaled and hinted outlines from a charstrings program. These are :
   *
   *  - a glyph builder, Z1_Builder, used to store the built outline
   *
   *  - a glyph hinter, Z1_Hinter, used to record and apply the stem
   *    hints
   *
   *  - a charstrings interpreter, Z1_Decoder, used to parse the
   *    Type 1 charstrings stream, manage a stack and call the builder
   *    and/or hinter depending on the opcodes.
   *
   *  Ideally, a Type 2 glyph loader would only need to have its own
   *  T2_Decoder object (assuming the hinter is able to manage all
   *  kinds of hints).
   *
   ******************************************************************/
  
  #ifndef T1GLOAD_H
  #define T1GLOAD_H
  
  #include <z1objs.h>
  
  #ifdef __cplusplus
    extern "C" {
  #endif
  
  
  /*************************************************************************/
  /*                                                                       */
  /* <Structure> Z1_Builder                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*     a structure used during glyph loading to store its outline.       */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    system :: current system object                                    */
  /*    face   :: current face object                                      */
  /*    glyph  :: current glyph slot                                       */
  /*                                                                       */
  /*    current :: current glyph outline                                   */
  /*    base    :: base glyph outline                                      */
  /*                                                                       */
  /*    max_points   :: maximum points in builder outline                  */
  /*    max_contours :: maximum contours in builder outline                */
  /*                                                                       */
  /*    last     :: last point position                                    */
  /*                                                                       */
  /*    scale_x  :: horizontal scale ( FUnits to sub-pixels )              */
  /*    scale_y  :: vertical scale   ( FUnits to sub-pixels )              */
  /*    pos_x    :: horizontal translation (composite glyphs)              */
  /*    pos_y    :: vertical translation   (composite glyph)               */
  /*                                                                       */
  /*    left_bearing  :: left side bearing point                           */
  /*    advance       :: horizontal advance vector                         */
  /*                                                                       */
  /*    path_begun    :: flag, indicates that a new path has begun         */
  /*    load_points   :: flag, if not set, no points are loaded            */
  /*                                                                       */
  /*    error         :: an error code that is only used to report         */
  /*                     memory allocation problems..                      */
  /*                                                                       */
  /*    metrics_only  :: a boolean indicating that we only want to         */
  /*                     compute the metrics of a given glyph, not load    */
  /*                     all of its points..                               */
  /*                                                                       */
  
    typedef struct Z1_Builder_
    {
      FT_Memory        memory;
      T1_Face          face;
      Z1_GlyphSlot     glyph;
      FT_GlyphLoader*  loader;
  
      FT_Outline*      current;       /* the current glyph outline   */
      FT_Outline*      base;          /* the composite glyph outline */
  
      FT_Vector        last;
  
      FT_Fixed         scale_x;
      FT_Fixed         scale_y;
  
      FT_Pos           pos_x;
      FT_Pos           pos_y;
  
      FT_Vector        left_bearing;
      FT_Vector        advance;
  
      FT_BBox          bbox;          /* bounding box */
      FT_Bool          path_begun;
      FT_Bool          load_points;
      FT_Bool          no_recurse;
  
      FT_Error         error;         /* only used for memory errors */
      FT_Bool          metrics_only;
  
    } Z1_Builder;
  
  
    /* execution context charstring zone */
    typedef struct Z1_Decoder_Zone_
    {
      FT_Byte*  base;
      FT_Byte*  limit;
      FT_Byte*  cursor;
  
    } Z1_Decoder_Zone;
  
  
    typedef struct Z1_Decoder_
    {
      Z1_Builder         builder;
  
      FT_Int             stack[ T1_MAX_CHARSTRINGS_OPERANDS ];
      FT_Int*            top;
  
      Z1_Decoder_Zone    zones[ T1_MAX_SUBRS_CALLS+1 ];
      Z1_Decoder_Zone*   zone;
  
      FT_Int             flex_state;
      FT_Int             num_flex_vectors;
      FT_Vector          flex_vectors[7];
  
      T1_Blend*          blend;  /* for multiple masters */
  
    } Z1_Decoder;
  
  
  
    LOCAL_DEF
    void  Z1_Init_Builder( Z1_Builder*             builder,
                           T1_Face                 face,
                           Z1_Size                 size,
                           Z1_GlyphSlot            glyph );
  
    LOCAL_DEF
    void Z1_Done_Builder( Z1_Builder*  builder );
  
  
    LOCAL_DEF
    void  Z1_Init_Decoder( Z1_Decoder* decoder );
  
  
    /* Compute the maximum advance width of a font through quick parsing */
    LOCAL_DEF
    FT_Error  Z1_Compute_Max_Advance( T1_Face  face,
                                      FT_Int  *max_advance );
  
  
    /* This function is exported, because it is used by the T1Dump utility */
    LOCAL_DEF
    FT_Error   Z1_Parse_CharStrings( Z1_Decoder*  decoder,
                                     FT_Byte*     charstring_base,
                                     FT_Int       charstring_len,
                                     FT_Int       num_subrs,
                                     FT_Byte**    subrs_base,
                                     FT_Int*      subrs_len );
  
  
  
    LOCAL_DEF
    FT_Error  Z1_Load_Glyph( Z1_GlyphSlot  glyph,
                             Z1_Size       size,
                             FT_Int        glyph_index,
                             FT_Int        load_flags );
  
  
  #ifdef __cplusplus
    }
  #endif
  
  #endif /* T1GLOAD_H */
  

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