include/freetype/ftsystem.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftsystem.h                                                             */
   4 /*                                                                         */
   5 /*    FreeType low-level system interface definition (specification).      */
   6 /*                                                                         */
   7 /*  Copyright 1996-2000 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 /***************************************************************************/
  17
  18
  19 #ifndef FTSYSTEM_H
  20 #define FTSYSTEM_H
  21
  22
  23   /*************************************************************************/
  24   /*                                                                       */
  25   /*                  M E M O R Y   M A N A G E M E N T                    */
  26   /*                                                                       */
  27   /*************************************************************************/
  28
  29
  30   typedef struct FT_MemoryRec_*  FT_Memory;
  31
  32
  33   typedef void*  (*FT_Alloc_Func)( FT_Memory  memory,
  34                                    long       size );
  35
  36   typedef void  (*FT_Free_Func)( FT_Memory  memory,
  37                                  void*      block );
  38
  39   typedef void*  (*FT_Realloc_Func)( FT_Memory  memory,
  40                                      long       cur_size,
  41                                      long       new_size,
  42                                      void*      block );
  43
  44
  45   struct FT_MemoryRec_
  46   {
  47     void*            user;
  48     FT_Alloc_Func    alloc;
  49     FT_Free_Func     free;
  50     FT_Realloc_Func  realloc;
  51   };
  52
  53
  54   /*************************************************************************/
  55   /*                                                                       */
  56   /*                       I / O   M A N A G E M E N T                     */
  57   /*                                                                       */
  58   /*************************************************************************/
  59
  60
  61   typedef union  FT_StreamDesc_
  62   {
  63     long   value;
  64     void*  pointer;
  65
  66   } FT_StreamDesc;
  67
  68
  69   typedef struct FT_StreamRec_*  FT_Stream;
  70
  71
  72   typedef unsigned long  (*FT_Stream_IO)( FT_Stream       stream,
  73                                           unsigned long   offset,
  74                                           unsigned char*  buffer,
  75                                           unsigned long   count );
  76
  77   typedef void  (*FT_Stream_Close)( FT_Stream  stream );
  78
  79
  80   struct  FT_StreamRec_
  81   {
  82     unsigned char*   base;
  83     unsigned long    size;
  84     unsigned long    pos;
  85
  86     FT_StreamDesc    descriptor;
  87     FT_StreamDesc    pathname;    /* ignored by FreeType -- */
  88                                   /* useful for debugging   */
  89     FT_Stream_IO     read;
  90     FT_Stream_Close  close;
  91
  92     FT_Memory        memory;
  93     unsigned char*   cursor;
  94     unsigned char*   limit;
  95   };
  96
  97
  98 #endif /* FTSYSTEM_H */
  99
 100
 101 /* END */