1/****************************************************************************
2 *
3 * pfrload.h
4 *
5 * FreeType PFR loader (specification).
6 *
7 * Copyright (C) 2002-2023 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 <freetype/internal/ftstream.h>
24
25
26FT_BEGIN_HEADER
27
28 /* some size checks should be always done (mainly to prevent */
29 /* excessive allocation for malformed data), ... */
30#define PFR_CHECK_SIZE( x ) do \
31 { \
32 if ( p + (x) > limit ) \
33 goto Too_Short; \
34 } while ( 0 )
35
36 /* ... and some only if intensive checking is explicitly requested */
37#ifdef PFR_CONFIG_NO_CHECKS
38#define PFR_CHECK( x ) do { } while ( 0 )
39#else
40#define PFR_CHECK PFR_CHECK_SIZE
41#endif
42
43#define PFR_NEXT_BYTE( p ) FT_NEXT_BYTE( p )
44#define PFR_NEXT_INT8( p ) FT_NEXT_CHAR( p )
45#define PFR_NEXT_SHORT( p ) FT_NEXT_SHORT( p )
46#define PFR_NEXT_USHORT( p ) FT_NEXT_USHORT( p )
47#define PFR_NEXT_LONG( p ) FT_NEXT_OFF3( p )
48#define PFR_NEXT_ULONG( p ) FT_NEXT_UOFF3( p )
49
50
51 /* handling extra items */
52
53 typedef FT_Error
54 (*PFR_ExtraItem_ParseFunc)( FT_Byte* p,
55 FT_Byte* limit,
56 FT_Pointer data );
57
58 typedef struct PFR_ExtraItemRec_
59 {
60 FT_UInt type;
61 PFR_ExtraItem_ParseFunc parser;
62
63 } PFR_ExtraItemRec;
64
65 typedef const struct PFR_ExtraItemRec_* PFR_ExtraItem;
66
67
68 FT_LOCAL( FT_Error )
69 pfr_extra_items_skip( FT_Byte* *pp,
70 FT_Byte* limit );
71
72 FT_LOCAL( FT_Error )
73 pfr_extra_items_parse( FT_Byte* *pp,
74 FT_Byte* limit,
75 PFR_ExtraItem item_list,
76 FT_Pointer item_data );
77
78
79 /* load a PFR header */
80 FT_LOCAL( FT_Error )
81 pfr_header_load( PFR_Header header,
82 FT_Stream stream );
83
84 /* check a PFR header */
85 FT_LOCAL( FT_Bool )
86 pfr_header_check( PFR_Header header );
87
88
89 /* return number of logical fonts in this file */
90 FT_LOCAL( FT_Error )
91 pfr_log_font_count( FT_Stream stream,
92 FT_UInt32 log_section_offset,
93 FT_Long *acount );
94
95 /* load a pfr logical font entry */
96 FT_LOCAL( FT_Error )
97 pfr_log_font_load( PFR_LogFont log_font,
98 FT_Stream stream,
99 FT_UInt face_index,
100 FT_UInt32 section_offset,
101 FT_Bool size_increment );
102
103
104 /* load a physical font entry */
105 FT_LOCAL( FT_Error )
106 pfr_phy_font_load( PFR_PhyFont phy_font,
107 FT_Stream stream,
108 FT_UInt32 offset,
109 FT_UInt32 size );
110
111 /* finalize a physical font */
112 FT_LOCAL( void )
113 pfr_phy_font_done( PFR_PhyFont phy_font,
114 FT_Memory memory );
115
116 /* */
117
118FT_END_HEADER
119
120#endif /* PFRLOAD_H_ */
121
122
123/* END */
124