kc3-lang/freetype/src/truetype/ttgload.h

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• Hash : 8f43c714
  Author :
  Date : 2000-02-02T12:16:19
  

  A major refresh of the TrueType driver : - some #ifdefs were included in order to _not_ compile support for the bytecode interpreter when FT_CONFIG_OPTION_BYTECODE_INTERPRETER is not defined in "ttconfig.h" - the glyph loader has been seriously re-designed. It is now smaller, simpler and should load composites a bit faster - works with the TrueType debugger

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• src/truetype/ttgload.h

• /***************************************************************************/
  /*                                                                         */
  /*  ttgload.h                                                              */
  /*                                                                         */
  /*    TrueType Glyph Loader (specification).                               */
  /*                                                                         */
  /*  Copyright 1996-1999 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 TTGLOAD_H
  #define TTGLOAD_H
  
  #include <ttobjs.h>
  
  #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
  #include <ttinterp.h>
  #endif
  
  #ifdef __cplusplus
    extern "C" {
  #endif
  
    typedef struct TT_Loader_
    {
      TT_Face         face;
      TT_Size         size;
      TT_GlyphSlot    glyph;
  
      TT_ULong        load_flags;
  
      FT_Stream       stream;
      TT_Int          byte_len;
      TT_Int          left_points;
      TT_Int          left_contours;
  
      TT_BBox         bbox;
      TT_Int          left_bearing;
      TT_Int          advance;
      TT_Bool         preserve_pps;
      TT_Vector       pp1;
      TT_Vector       pp2;
          
      TT_ULong        glyf_offset;
          
      /* the zone where we load our glyphs */
      TT_GlyphZone    base;
      TT_GlyphZone    zone;
      
  #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
      TT_ExecContext  exec;
      TT_Byte*        instructions;
  #endif
  
    } TT_Loader;
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    TT_Get_Metrics                                                     */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Returns the horizontal or vertical metrics in font units for a     */
    /*    given glyph.  The metrics are the left side bearing (resp. top     */
    /*    side bearing) and advance width (resp. advance height).            */
    /*                                                                       */
    /* <Input>                                                               */
    /*    header  :: A pointer to either the horizontal or vertical metrics  */
    /*               structure.                                              */
    /*                                                                       */
    /*    index   :: The glyph index.                                        */
    /*                                                                       */
    /* <Output>                                                              */
    /*    bearing :: The bearing, either left side or top side.              */
    /*                                                                       */
    /*    advance :: The advance width resp. advance height.                 */
    /*                                                                       */
    /* <Note>                                                                */
    /*    This function will much probably move to another component in the  */
    /*    near future, but I haven't decided which yet.                      */
    /*                                                                       */
    LOCAL_DEF
    void  TT_Get_Metrics( TT_HoriHeader*  header,
                          TT_UInt         index,
                          TT_Short*       bearing,
                          TT_UShort*      advance );
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    TT_Load_Glyph                                                      */
    /*                                                                       */
    /* <Description>                                                         */
    /*    A function used to load a single glyph within a given glyph slot,  */
    /*    for a given size.                                                  */
    /*                                                                       */
    /* <Input>                                                               */
    /*    glyph       :: A handle to a target slot object where the glyph    */
    /*                   will be loaded.                                     */
    /*                                                                       */
    /*    size        :: A handle to the source face size at which the glyph */
    /*                   must be scaled/loaded.                              */
    /*                                                                       */
    /*    glyph_index :: The index of the glyph in the font file.            */
    /*                                                                       */
    /*    load_flags  :: A flag indicating what to load for this glyph.  The */
    /*                   FT_LOAD_XXX constants can be used to control the    */
    /*                   glyph loading process (e.g., whether the outline    */
    /*                   should be scaled, whether to load bitmaps or not,   */
    /*                   whether to hint the outline, etc).                  */
    /* <Output>                                                              */
    /*    result      :: A set of bit flags indicating the type of data that */
    /*                   was loaded in the glyph slot (outline or bitmap,    */
    /*                   etc).                                               */
    /*                                                                       */
    /*                   You can set this field to 0 if you don't want this  */
    /*                   information.                                        */
    /*                                                                       */
    /* <Return>                                                              */
    /*    FreeType error code.  0 means success.                             */
    /*                                                                       */
    LOCAL_DEF
    TT_Error  TT_Load_Glyph( TT_Size       size,
                             TT_GlyphSlot  glyph,
                             TT_UShort     glyph_index,
                             TT_UInt       load_flags );
  
  #ifdef __cplusplus
    }
  #endif
  
  
  #endif /* TTGLOAD_H */
  
  
  /* END */
  

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