/src/freetype/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
 26FT_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
113FT_END_HEADER
114
115#endif /* __PFRLOAD_H__ */
116
117
118/* END */