kc3-lang/freetype/src/cff/t2gload.h

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• Hash : 7fa51b55
  Author :
  Date : 2000-07-08T19:51:42
  

  Formatting. Adding some trivial error checking. Adding/Fixing tracing levels.

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• src/cff/t2gload.h

• /***************************************************************************/
  /*                                                                         */
  /*  t2gload.h                                                              */
  /*                                                                         */
  /*    OpenType Glyph Loader (specification).                               */
  /*                                                                         */
  /*  Copyright 1996-2000 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.                                        */
  /*                                                                         */
  /***************************************************************************/
  
  
  #ifndef T2GLOAD_H
  #define T2GLOAD_H
  
  #include <freetype/freetype.h>
  
  
  #ifdef FT_FLAT_COMPILE
  
  #include "t2objs.h"
  
  #else
  
  #include <cff/t2objs.h>
  
  #endif
  
  
  #ifdef __cplusplus
    extern "C" {
  #endif
  
  
  #define T2_MAX_OPERANDS     48
  #define T2_MAX_SUBRS_CALLS  32
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Structure>                                                           */
    /*    T2_Builder                                                         */
    /*                                                                       */
    /* <Description>                                                         */
    /*     A structure used during glyph loading to store its outline.       */
    /*                                                                       */
    /* <Fields>                                                              */
    /*    memory       :: The current memory object.                         */
    /*                                                                       */
    /*    face         :: The current face object.                           */
    /*                                                                       */
    /*    glyph        :: The current glyph slot.                            */
    /*                                                                       */
    /*    current      :: The current glyph outline.                         */
    /*                                                                       */
    /*    base         :: The base glyph outline.                            */
    /*                                                                       */
    /*    max_points   :: maximum points in builder outline                  */
    /*                                                                       */
    /*    max_contours :: Maximal number of contours in builder outline.     */
    /*                                                                       */
    /*    last         :: The last point position.                           */
    /*                                                                       */
    /*    scale_x      :: The horizontal scale (FUnits to sub-pixels).       */
    /*                                                                       */
    /*    scale_y      :: The vertical scale (FUnits to sub-pixels).         */
    /*                                                                       */
    /*    pos_x        :: The horizontal translation (if composite glyph).   */
    /*                                                                       */
    /*    pos_y        :: The vertical translation (if composite glyph).     */
    /*                                                                       */
    /*    left_bearing :: The left side bearing point.                       */
    /*                                                                       */
    /*    advance      :: The horizontal advance vector.                     */
    /*                                                                       */
    /*    bbox         :: Unused.                                            */
    /*                                                                       */
    /*    path_begun   :: A flag which indicates that a new path has begun.  */
    /*                                                                       */
    /*    load_points  :: If this flag is not set, no points are loaded.     */
    /*                                                                       */
    /*    no_recurse   :: Set but not used.                                  */
    /*                                                                       */
    /*    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  T2_Builder_
    {
      FT_Memory        memory;
      TT_Face          face;
      T2_GlyphSlot     glyph;
      FT_GlyphLoader*  loader;
      FT_Outline*      base;
      FT_Outline*      current;
  
      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;
  
    } T2_Builder;
  
  
    /* execution context charstring zone */
  
    typedef struct  T2_Decoder_Zone_
    {
      FT_Byte*  base;
      FT_Byte*  limit;
      FT_Byte*  cursor;
  
    } T2_Decoder_Zone;
  
  
    typedef struct  T2_Decoder_
    {
      T2_Builder        builder;
      CFF_Font*         cff;
  
      FT_Fixed          stack[T2_MAX_OPERANDS + 1];
      FT_Fixed*         top;
  
      T2_Decoder_Zone   zones[T2_MAX_SUBRS_CALLS + 1];
      T2_Decoder_Zone*  zone;
  
      FT_Int            flex_state;
      FT_Int            num_flex_vectors;
      FT_Vector         flex_vectors[7];
  
      FT_Pos            glyph_width;
      FT_Pos            nominal_width;
  
      FT_Bool           read_width;
      FT_Int            num_hints;
      FT_Fixed*         buildchar;
      FT_Int            len_buildchar;
  
      FT_UInt           num_locals;
      FT_UInt           num_globals;
  
      FT_Int            locals_bias;
      FT_Int            globals_bias;
  
      FT_Byte**         locals;
      FT_Byte**         globals;
  
    } T2_Decoder;
  
  
    LOCAL_DEF
    void  T2_Init_Decoder( T2_Decoder*   decoder,
                           TT_Face       face,
                           T2_Size       size,
                           T2_GlyphSlot  slot );
  
    LOCAL_DEF
    void  T2_Prepare_Decoder( T2_Decoder*  decoder,
                              FT_UInt      glyph_index );
  
  #if 0  /* unused until we support pure CFF fonts */
  
    /* Compute the maximum advance width of a font through quick parsing */
    LOCAL_DEF
    FT_Error  T2_Compute_Max_Advance( TT_Face  face,
                                      FT_Int*  max_advance );
  
  #endif /* 0 */
  
    LOCAL_DEF
    FT_Error  T2_Parse_CharStrings( T2_Decoder*  decoder,
                                    FT_Byte*     charstring_base,
                                    FT_Int       charstring_len );
  
    LOCAL_DEF
    FT_Error  T2_Load_Glyph( T2_GlyphSlot  glyph,
                             T2_Size       size,
                             FT_Int        glyph_index,
                             FT_Int        load_flags );
  
  
  #ifdef __cplusplus
    }
  #endif
  
  
  #endif /* T2GLOAD_H */
  
  
  /* END */
  

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