pfrload.h (3425B)
1 /**************************************************************************** 2 * 3 * pfrload.h 4 * 5 * FreeType PFR loader (specification). 6 * 7 * Copyright (C) 2002-2025 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 26 FT_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 /* */ 117 118 FT_END_HEADER 119 120 #endif /* PFRLOAD_H_ */ 121 122 123 /* END */