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

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• Hash : 2d15120c
  Author :
  Date : 2009-10-19T21:09:13
  

  Fix handling of `get' and `put' CFF instructions. * src/cff/cffgload.c (cff_decoder_parse_charstrings) <cff_op_get, cff_op_put>: Appendix B of Adobe Technote #5177 limits the number of elements for the `get' and `put' operators to 32. * src/cff/cffgload.h (CFF_MAX_TRANS_ELEMENTS): Define. (CFF_Decoder): Use it for `buildchar' and remove `len_buildchar'.

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• src/cff/cffgload.h

• /***************************************************************************/
  /*                                                                         */
  /*  cffgload.h                                                             */
  /*                                                                         */
  /*    OpenType Glyph Loader (specification).                               */
  /*                                                                         */
  /*  Copyright 1996-2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009 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 __CFFGLOAD_H__
  #define __CFFGLOAD_H__
  
  
  #include <ft2build.h>
  #include FT_FREETYPE_H
  #include "cffobjs.h"
  
  
  FT_BEGIN_HEADER
  
  
  #define CFF_MAX_OPERANDS     48
  #define CFF_MAX_SUBRS_CALLS  32
  #define CFF_MAX_TRANS_ELEMENTS 32
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Structure>                                                           */
    /*    CFF_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.                           */
    /*                                                                       */
    /*    loader        :: The current glyph loader.                         */
    /*                                                                       */
    /*    base          :: The base glyph outline.                           */
    /*                                                                       */
    /*    current       :: The current glyph outline.                        */
    /*                                                                       */
    /*    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.                                 */
    /*                                                                       */
    /*    metrics_only  :: A boolean indicating that we only want to compute */
    /*                     the metrics of a given glyph, not load all of its */
    /*                     points.                                           */
    /*                                                                       */
    /*    hints_funcs   :: Auxiliary pointer for hinting.                    */
    /*                                                                       */
    /*    hints_globals :: Auxiliary pointer for hinting.                    */
    /*                                                                       */
    typedef struct  CFF_Builder_
    {
      FT_Memory       memory;
      TT_Face         face;
      CFF_GlyphSlot   glyph;
      FT_GlyphLoader  loader;
      FT_Outline*     base;
      FT_Outline*     current;
  
      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_Bool         metrics_only;
  
      void*           hints_funcs;    /* hinter-specific */
      void*           hints_globals;  /* hinter-specific */
  
    } CFF_Builder;
  
  
    /* execution context charstring zone */
  
    typedef struct  CFF_Decoder_Zone_
    {
      FT_Byte*  base;
      FT_Byte*  limit;
      FT_Byte*  cursor;
  
    } CFF_Decoder_Zone;
  
  
    typedef struct  CFF_Decoder_
    {
      CFF_Builder        builder;
      CFF_Font           cff;
  
      FT_Fixed           stack[CFF_MAX_OPERANDS + 1];
      FT_Fixed*          top;
  
      CFF_Decoder_Zone   zones[CFF_MAX_SUBRS_CALLS + 1];
      CFF_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_Bool            width_only;
      FT_Int             num_hints;
      FT_Fixed           buildchar[CFF_MAX_TRANS_ELEMENTS];
  
      FT_UInt            num_locals;
      FT_UInt            num_globals;
  
      FT_Int             locals_bias;
      FT_Int             globals_bias;
  
      FT_Byte**          locals;
      FT_Byte**          globals;
  
      FT_Byte**          glyph_names;   /* for pure CFF fonts only  */
      FT_UInt            num_glyphs;    /* number of glyphs in font */
  
      FT_Render_Mode     hint_mode;
  
      FT_Bool            seac;
  
    } CFF_Decoder;
  
  
    FT_LOCAL( void )
    cff_decoder_init( CFF_Decoder*    decoder,
                      TT_Face         face,
                      CFF_Size        size,
                      CFF_GlyphSlot   slot,
                      FT_Bool         hinting,
                      FT_Render_Mode  hint_mode );
  
    FT_LOCAL( FT_Error )
    cff_decoder_prepare( CFF_Decoder*  decoder,
                         CFF_Size      size,
                         FT_UInt       glyph_index );
  
  #if 0  /* unused until we support pure CFF fonts */
  
    /* Compute the maximum advance width of a font through quick parsing */
    FT_LOCAL( FT_Error )
    cff_compute_max_advance( TT_Face  face,
                             FT_Int*  max_advance );
  
  #endif /* 0 */
  
    FT_LOCAL( FT_Error )
    cff_decoder_parse_charstrings( CFF_Decoder*  decoder,
                                   FT_Byte*      charstring_base,
                                   FT_ULong      charstring_len );
  
    FT_LOCAL( FT_Error )
    cff_slot_load( CFF_GlyphSlot  glyph,
                   CFF_Size       size,
                   FT_UInt        glyph_index,
                   FT_Int32       load_flags );
  
  
  FT_END_HEADER
  
  #endif /* __CFFGLOAD_H__ */
  
  
  /* END */
  

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