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ftdriver.h
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上传日期：2020-08-09
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文件大小：11k
源码类别：

其他游戏

开发平台：

Visual C++

ftdriver.h：源码内容
  1. /***************************************************************************/
  2. /*                                                                         */
  3. /*  ftdriver.h                                                             */
  4. /*                                                                         */
  5. /*    FreeType font driver interface (specification).                      */
  6. /*                                                                         */
  7. /*  Copyright 1996-2001, 2002, 2003, 2006 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. /***************************************************************************/
  19. #ifndef __FTDRIVER_H__
  20. #define __FTDRIVER_H__
  23. #include <ft2build.h>
  24. #include FT_MODULE_H
  27. FT_BEGIN_HEADER
  30.   typedef FT_Error
  31.   (*FT_Face_InitFunc)( FT_Stream      stream,
  32.                        FT_Face        face,
  33.                        FT_Int         typeface_index,
  34.                        FT_Int         num_params,
  35.                        FT_Parameter*  parameters );
  37.   typedef void
  38.   (*FT_Face_DoneFunc)( FT_Face  face );
  41.   typedef FT_Error
  42.   (*FT_Size_InitFunc)( FT_Size  size );
  44.   typedef void
  45.   (*FT_Size_DoneFunc)( FT_Size  size );
  48.   typedef FT_Error
  49.   (*FT_Slot_InitFunc)( FT_GlyphSlot  slot );
  51.   typedef void
  52.   (*FT_Slot_DoneFunc)( FT_GlyphSlot  slot );
  55.   typedef FT_Error
  56.   (*FT_Size_RequestFunc)( FT_Size          size,
  57.                           FT_Size_Request  req );
  59.   typedef FT_Error
  60.   (*FT_Size_SelectFunc)( FT_Size   size,
  61.                          FT_ULong  size_index );
  63. #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
  65.   typedef FT_Error
  66.   (*FT_Size_ResetPointsFunc)( FT_Size     size,
  67.                               FT_F26Dot6  char_width,
  68.                               FT_F26Dot6  char_height,
  69.                               FT_UInt     horz_resolution,
  70.                               FT_UInt     vert_resolution );
  72.   typedef FT_Error
  73.   (*FT_Size_ResetPixelsFunc)( FT_Size  size,
  74.                               FT_UInt  pixel_width,
  75.                               FT_UInt  pixel_height );
  77. #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
  79.   typedef FT_Error
  80.   (*FT_Slot_LoadFunc)( FT_GlyphSlot  slot,
  81.                        FT_Size       size,
  82.                        FT_UInt       glyph_index,
  83.                        FT_Int32      load_flags );
  86.   typedef FT_UInt
  87.   (*FT_CharMap_CharIndexFunc)( FT_CharMap  charmap,
  88.                                FT_Long     charcode );
  90.   typedef FT_Long
  91.   (*FT_CharMap_CharNextFunc)( FT_CharMap  charmap,
  92.                               FT_Long     charcode );
  94.   typedef FT_Error
  95.   (*FT_Face_GetKerningFunc)( FT_Face     face,
  96.                              FT_UInt     left_glyph,
  97.                              FT_UInt     right_glyph,
  98.                              FT_Vector*  kerning );
  101.   typedef FT_Error
  102.   (*FT_Face_AttachFunc)( FT_Face    face,
  103.                          FT_Stream  stream );
  106.   typedef FT_Error
  107.   (*FT_Face_GetAdvancesFunc)( FT_Face     face,
  108.                               FT_UInt     first,
  109.                               FT_UInt     count,
  110.                               FT_Bool     vertical,
  111.                               FT_UShort*  advances );
  114.   /*************************************************************************/
  115.   /*                                                                       */
  116.   /* <Struct>                                                              */
  117.   /*    FT_Driver_ClassRec                                                 */
  118.   /*                                                                       */
  119.   /* <Description>                                                         */
  120.   /*    The font driver class.  This structure mostly contains pointers to */
  121.   /*    driver methods.                                                    */
  122.   /*                                                                       */
  123.   /* <Fields>                                                              */
  124.   /*    root             :: The parent module.                             */
  125.   /*                                                                       */
  126.   /*    face_object_size :: The size of a face object in bytes.            */
  127.   /*                                                                       */
  128.   /*    size_object_size :: The size of a size object in bytes.            */
  129.   /*                                                                       */
  130.   /*    slot_object_size :: The size of a glyph object in bytes.           */
  131.   /*                                                                       */
  132.   /*    init_face        :: The format-specific face constructor.          */
  133.   /*                                                                       */
  134.   /*    done_face        :: The format-specific face destructor.           */
  135.   /*                                                                       */
  136.   /*    init_size        :: The format-specific size constructor.          */
  137.   /*                                                                       */
  138.   /*    done_size        :: The format-specific size destructor.           */
  139.   /*                                                                       */
  140.   /*    init_slot        :: The format-specific slot constructor.          */
  141.   /*                                                                       */
  142.   /*    done_slot        :: The format-specific slot destructor.           */
  143.   /*                                                                       */
  144.   /*                                                                       */
  145.   /*    load_glyph       :: A function handle to load a glyph to a slot.   */
  146.   /*                        This field is mandatory!                       */
  147.   /*                                                                       */
  148.   /*    get_char_index   :: A function handle to return the glyph index of */
  149.   /*                        a given character for a given charmap.  This   */
  150.   /*                        field is mandatory!                            */
  151.   /*                                                                       */
  152.   /*    get_kerning      :: A function handle to return the unscaled       */
  153.   /*                        kerning for a given pair of glyphs.  Can be    */
  154.   /*                        set to 0 if the format doesn't support         */
  155.   /*                        kerning.                                       */
  156.   /*                                                                       */
  157.   /*    attach_file      :: This function handle is used to read           */
  158.   /*                        additional data for a face from another        */
  159.   /*                        file/stream.  For example, this can be used to */
  160.   /*                        add data from AFM or PFM files on a Type 1     */
  161.   /*                        face, or a CIDMap on a CID-keyed face.         */
  162.   /*                                                                       */
  163.   /*    get_advances     :: A function handle used to return advance       */
  164.   /*                        widths of `count' glyphs (in font units),      */
  165.   /*                        starting at `first'.  The `vertical' flag must */
  166.   /*                        be set to get vertical advance heights.  The   */
  167.   /*                        `advances' buffer is caller-allocated.         */
  168.   /*                        Currently not implemented.  The idea of this   */
  169.   /*                        function is to be able to perform              */
  170.   /*                        device-independent text layout without loading */
  171.   /*                        a single glyph image.                          */
  172.   /*                                                                       */
  173.   /*    request_size     :: A handle to a function used to request the new */
  174.   /*                        character size.  Can be set to 0 if the        */
  175.   /*                        scaling done in the base layer suffices.       */
  176.   /*                                                                       */
  177.   /*    select_size      :: A handle to a function used to select a new    */
  178.   /*                        fixed size.  It is used only if                */
  179.   /*                        @FT_FACE_FLAG_FIXED_SIZES is set.  Can be set  */
  180.   /*                        to 0 if the scaling done in the base layer     */
  181.   /*                        suffices.                                      */
  182.   /* <Note>                                                                */
  183.   /*    Most function pointers, with the exception of `load_glyph' and     */
  184.   /*    `get_char_index' can be set to 0 to indicate a default behaviour.  */
  185.   /*                                                                       */
  186.   typedef struct  FT_Driver_ClassRec_
  187.   {
  188.     FT_Module_Class           root;
  190.     FT_Long                   face_object_size;
  191.     FT_Long                   size_object_size;
  192.     FT_Long                   slot_object_size;
  194.     FT_Face_InitFunc          init_face;
  195.     FT_Face_DoneFunc          done_face;
  197.     FT_Size_InitFunc          init_size;
  198.     FT_Size_DoneFunc          done_size;
  200.     FT_Slot_InitFunc          init_slot;
  201.     FT_Slot_DoneFunc          done_slot;
  203. #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
  205.     FT_Size_ResetPointsFunc   set_char_sizes;
  206.     FT_Size_ResetPixelsFunc   set_pixel_sizes;
  208. #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
  210.     FT_Slot_LoadFunc          load_glyph;
  212.     FT_Face_GetKerningFunc    get_kerning;
  213.     FT_Face_AttachFunc        attach_file;
  214.     FT_Face_GetAdvancesFunc   get_advances;
  216.     /* since version 2.2 */
  217.     FT_Size_RequestFunc       request_size;
  218.     FT_Size_SelectFunc        select_size;
  220.   } FT_Driver_ClassRec, *FT_Driver_Class;
  223.   /*
  224.    *  The following functions are used as stubs for `set_char_sizes' and
  225.    *  `set_pixel_sizes'; the code uses `request_size' and `select_size'
  226.    *  functions instead.
  227.    *
  228.    *  Implementation is in `src/base/ftobjs.c'.
  229.    */
  230. #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
  232.   FT_BASE( FT_Error )
  233.   ft_stub_set_char_sizes( FT_Size     size,
  234.                           FT_F26Dot6  width,
  235.                           FT_F26Dot6  height,
  236.                           FT_UInt     horz_res,
  237.                           FT_UInt     vert_res );
  239.   FT_BASE( FT_Error )
  240.   ft_stub_set_pixel_sizes( FT_Size  size,
  241.                            FT_UInt  width,
  242.                            FT_UInt  height );
  244. #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
  247. FT_END_HEADER
  249. #endif /* __FTDRIVER_H__ */
  252. /* END */