src/pfr/pfrload.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  pfrload.h                                                              */
   4 /*                                                                         */
   5 /*    FreeType PFR loader (specification).                                 */
   6 /*                                                                         */
   7 /*  Copyright 2002 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 __PFRLOAD_H__
  20 #define __PFRLOAD_H__
  21
  22 #include "pfrobjs.h"
  23 #include FT_INTERNAL_STREAM_H
  24
  25
  26 FT_BEGIN_HEADER
  27
  28 #ifdef PFR_CONFIG_NO_CHECKS
  29 #define PFR_CHECK( x )  do { } while ( 0 )
  30 #else
  31 #define PFR_CHECK( x )  do                       \
  32                         {                        \
  33                           if ( p + (x) > limit ) \
  34                             goto Too_Short;      \
  35                         } while ( 0 )
  36 #endif
  37
  38 #define PFR_NEXT_BYTE( p )    FT_NEXT_BYTE( p )
  39 #define PFR_NEXT_INT8( p )    FT_NEXT_CHAR( p )
  40 #define PFR_NEXT_SHORT( p )   FT_NEXT_SHORT( p )
  41 #define PFR_NEXT_USHORT( p )  FT_NEXT_USHORT( p )
  42 #define PFR_NEXT_LONG( p )    FT_NEXT_OFF3( p )
  43 #define PFR_NEXT_ULONG( p )   FT_NEXT_UOFF3( p )
  44
  45
  46  /* handling extra items */
  47
  48   typedef FT_Error
  49   (*PFR_ExtraItem_ParseFunc)( FT_Byte*    p,
  50                               FT_Byte*    limit,
  51                               FT_Pointer  data );
  52
  53   typedef struct  PFR_ExtraItemRec_
  54   {
  55     FT_UInt                  type;
  56     PFR_ExtraItem_ParseFunc  parser;
  57
  58   } PFR_ExtraItemRec;
  59
  60   typedef const struct PFR_ExtraItemRec_*  PFR_ExtraItem;
  61
  62
  63   FT_LOCAL( FT_Error )
  64   pfr_extra_items_skip( FT_Byte*  *pp,
  65                         FT_Byte*  limit );
  66
  67   FT_LOCAL( FT_Error )
  68   pfr_extra_items_parse( FT_Byte*      *pp,
  69                          FT_Byte*       limit,
  70                          PFR_ExtraItem  item_list,
  71                          FT_Pointer     item_data );
  72
  73
  74   /* load a PFR header */
  75   FT_LOCAL( FT_Error )
  76   pfr_header_load( PFR_Header  header,
  77                    FT_Stream   stream );
  78
  79   /* check a PFR header */
  80   FT_LOCAL( FT_Bool )
  81   pfr_header_check( PFR_Header  header );
  82
  83
  84   /* return number of logical fonts in this file */
  85   FT_LOCAL( FT_Error )
  86   pfr_log_font_count( FT_Stream   stream,
  87                       FT_UInt32   log_section_offset,
  88                       FT_UInt    *acount );
  89
  90   /* load a pfr logical font entry */
  91   FT_LOCAL( FT_Error )
  92   pfr_log_font_load( PFR_LogFont  log_font,
  93                      FT_Stream    stream,
  94                      FT_UInt      face_index,
  95                      FT_UInt32    section_offset,
  96                      FT_Bool      size_increment );
  97
  98
  99   /* load a physical font entry */
 100   FT_LOCAL( FT_Error )
 101   pfr_phy_font_load( PFR_PhyFont  phy_font,
 102                      FT_Stream    stream,
 103                      FT_UInt32    offset,
 104                      FT_UInt32    size );
 105
 106   /* finalize a physical font */
 107   FT_LOCAL( void )
 108   pfr_phy_font_done( PFR_PhyFont  phy_font,
 109                      FT_Memory    memory );
 110
 111   /* */
 112
 113 FT_END_HEADER
 114
 115 #endif /* __PFRLOAD_H__ */
 116
 117
 118 /* END */