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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /***************************************************************************/ |
| 2 | /* */ |
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| 3 | /* otvgdef.c */ |
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| 4 | /* */ |
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| 5 | /* OpenType GDEF table validation (body). */ |
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| 6 | /* */ |
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| 7 | /* Copyright 2004, 2005, 2007 by */ |
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| 8 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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| 9 | /* */ |
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| 10 | /* This file is part of the FreeType project, and may only be used, */ |
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| 11 | /* modified, and distributed under the terms of the FreeType project */ |
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| 12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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| 13 | /* this file you indicate that you have read the license and */ |
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| 14 | /* understand and accept it fully. */ |
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| 15 | /* */ |
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| 16 | /***************************************************************************/ |
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| 17 | |||
| 18 | |||
| 19 | #include "otvalid.h" |
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| 20 | #include "otvcommn.h" |
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| 21 | |||
| 22 | |||
| 23 | /*************************************************************************/ |
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| 24 | /* */ |
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| 25 | /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
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| 26 | /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
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| 27 | /* messages during execution. */ |
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| 28 | /* */ |
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| 29 | #undef FT_COMPONENT |
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| 30 | #define FT_COMPONENT trace_otvgdef |
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| 31 | |||
| 32 | |||
| 33 | /*************************************************************************/ |
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| 34 | /*************************************************************************/ |
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| 35 | /***** *****/ |
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| 36 | /***** UTILITY FUNCTIONS *****/ |
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| 37 | /***** *****/ |
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| 38 | /*************************************************************************/ |
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| 39 | /*************************************************************************/ |
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| 40 | |||
| 41 | #define AttachListFunc otv_O_x_Ox |
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| 42 | #define LigCaretListFunc otv_O_x_Ox |
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| 43 | |||
| 44 | /* sets valid->extra1 (0) */ |
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| 45 | |||
| 46 | static void |
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| 47 | otv_O_x_Ox( FT_Bytes table, |
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| 48 | OTV_Validator valid ) |
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| 49 | { |
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| 50 | FT_Bytes p = table; |
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| 51 | FT_Bytes Coverage; |
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| 52 | FT_UInt GlyphCount; |
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| 53 | OTV_Validate_Func func; |
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| 54 | |||
| 55 | |||
| 56 | OTV_ENTER; |
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| 57 | |||
| 58 | OTV_LIMIT_CHECK( 4 ); |
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| 59 | Coverage = table + FT_NEXT_USHORT( p ); |
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| 60 | GlyphCount = FT_NEXT_USHORT( p ); |
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| 61 | |||
| 62 | OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount )); |
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| 63 | |||
| 64 | otv_Coverage_validate( Coverage, valid, GlyphCount ); |
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| 65 | if ( GlyphCount != otv_Coverage_get_count( Coverage ) ) |
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| 66 | FT_INVALID_DATA; |
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| 67 | |||
| 68 | OTV_LIMIT_CHECK( GlyphCount * 2 ); |
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| 69 | |||
| 70 | valid->nesting_level++; |
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| 71 | func = valid->func[valid->nesting_level]; |
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| 72 | valid->extra1 = 0; |
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| 73 | |||
| 74 | for ( ; GlyphCount > 0; GlyphCount-- ) |
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| 75 | func( table + FT_NEXT_USHORT( p ), valid ); |
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| 76 | |||
| 77 | valid->nesting_level--; |
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| 78 | |||
| 79 | OTV_EXIT; |
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| 80 | } |
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| 81 | |||
| 82 | |||
| 83 | /*************************************************************************/ |
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| 84 | /*************************************************************************/ |
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| 85 | /***** *****/ |
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| 86 | /***** LIGATURE CARETS *****/ |
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| 87 | /***** *****/ |
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| 88 | /*************************************************************************/ |
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| 89 | /*************************************************************************/ |
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| 90 | |||
| 91 | #define CaretValueFunc otv_CaretValue_validate |
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| 92 | |||
| 93 | static void |
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| 94 | otv_CaretValue_validate( FT_Bytes table, |
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| 95 | OTV_Validator valid ) |
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| 96 | { |
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| 97 | FT_Bytes p = table; |
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| 98 | FT_UInt CaretValueFormat; |
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| 99 | |||
| 100 | |||
| 101 | OTV_ENTER; |
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| 102 | |||
| 103 | OTV_LIMIT_CHECK( 4 ); |
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| 104 | |||
| 105 | CaretValueFormat = FT_NEXT_USHORT( p ); |
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| 106 | |||
| 107 | OTV_TRACE(( " (format = %d)\n", CaretValueFormat )); |
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| 108 | |||
| 109 | switch ( CaretValueFormat ) |
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| 110 | { |
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| 111 | case 1: /* CaretValueFormat1 */ |
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| 112 | /* skip Coordinate, no test */ |
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| 113 | break; |
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| 114 | |||
| 115 | case 2: /* CaretValueFormat2 */ |
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| 116 | /* skip CaretValuePoint, no test */ |
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| 117 | break; |
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| 118 | |||
| 119 | case 3: /* CaretValueFormat3 */ |
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| 120 | p += 2; /* skip Coordinate */ |
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| 121 | |||
| 122 | OTV_LIMIT_CHECK( 2 ); |
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| 123 | |||
| 124 | /* DeviceTable */ |
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| 125 | otv_Device_validate( table + FT_NEXT_USHORT( p ), valid ); |
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| 126 | break; |
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| 127 | |||
| 128 | default: |
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| 129 | FT_INVALID_FORMAT; |
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| 130 | } |
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| 131 | |||
| 132 | OTV_EXIT; |
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| 133 | } |
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| 134 | |||
| 135 | |||
| 136 | /*************************************************************************/ |
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| 137 | /*************************************************************************/ |
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| 138 | /***** *****/ |
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| 139 | /***** GDEF TABLE *****/ |
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| 140 | /***** *****/ |
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| 141 | /*************************************************************************/ |
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| 142 | /*************************************************************************/ |
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| 143 | |||
| 144 | /* sets valid->glyph_count */ |
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| 145 | |||
| 146 | FT_LOCAL_DEF( void ) |
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| 147 | otv_GDEF_validate( FT_Bytes table, |
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| 148 | FT_Bytes gsub, |
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| 149 | FT_Bytes gpos, |
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| 150 | FT_UInt glyph_count, |
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| 151 | FT_Validator ftvalid ) |
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| 152 | { |
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| 153 | OTV_ValidatorRec validrec; |
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| 154 | OTV_Validator valid = &validrec; |
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| 155 | FT_Bytes p = table; |
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| 156 | FT_UInt table_size; |
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| 157 | FT_Bool need_MarkAttachClassDef; |
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| 158 | |||
| 159 | OTV_OPTIONAL_TABLE( GlyphClassDef ); |
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| 160 | OTV_OPTIONAL_TABLE( AttachListOffset ); |
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| 161 | OTV_OPTIONAL_TABLE( LigCaretListOffset ); |
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| 162 | OTV_OPTIONAL_TABLE( MarkAttachClassDef ); |
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| 163 | |||
| 164 | |||
| 165 | valid->root = ftvalid; |
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| 166 | |||
| 167 | FT_TRACE3(( "validating GDEF table\n" )); |
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| 168 | OTV_INIT; |
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| 169 | |||
| 170 | OTV_LIMIT_CHECK( 12 ); |
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| 171 | |||
| 172 | if ( FT_NEXT_ULONG( p ) != 0x10000UL ) /* Version */ |
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| 173 | FT_INVALID_FORMAT; |
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| 174 | |||
| 175 | /* MarkAttachClassDef has been added to the OpenType */ |
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| 176 | /* specification without increasing GDEF's version, */ |
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| 177 | /* so we use this ugly hack to find out whether the */ |
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| 178 | /* table is needed actually. */ |
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| 179 | |||
| 180 | need_MarkAttachClassDef = FT_BOOL( |
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| 181 | otv_GSUBGPOS_have_MarkAttachmentType_flag( gsub ) || |
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| 182 | otv_GSUBGPOS_have_MarkAttachmentType_flag( gpos ) ); |
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| 183 | |||
| 184 | if ( need_MarkAttachClassDef ) |
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| 185 | table_size = 12; /* OpenType >= 1.2 */ |
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| 186 | else |
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| 187 | table_size = 10; /* OpenType < 1.2 */ |
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| 188 | |||
| 189 | valid->glyph_count = glyph_count; |
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| 190 | |||
| 191 | OTV_OPTIONAL_OFFSET( GlyphClassDef ); |
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| 192 | OTV_SIZE_CHECK( GlyphClassDef ); |
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| 193 | if ( GlyphClassDef ) |
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| 194 | otv_ClassDef_validate( table + GlyphClassDef, valid ); |
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| 195 | |||
| 196 | OTV_OPTIONAL_OFFSET( AttachListOffset ); |
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| 197 | OTV_SIZE_CHECK( AttachListOffset ); |
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| 198 | if ( AttachListOffset ) |
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| 199 | { |
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| 200 | OTV_NEST2( AttachList, AttachPoint ); |
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| 201 | OTV_RUN( table + AttachListOffset, valid ); |
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| 202 | } |
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| 203 | |||
| 204 | OTV_OPTIONAL_OFFSET( LigCaretListOffset ); |
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| 205 | OTV_SIZE_CHECK( LigCaretListOffset ); |
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| 206 | if ( LigCaretListOffset ) |
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| 207 | { |
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| 208 | OTV_NEST3( LigCaretList, LigGlyph, CaretValue ); |
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| 209 | OTV_RUN( table + LigCaretListOffset, valid ); |
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| 210 | } |
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| 211 | |||
| 212 | if ( need_MarkAttachClassDef ) |
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| 213 | { |
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| 214 | OTV_OPTIONAL_OFFSET( MarkAttachClassDef ); |
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| 215 | OTV_SIZE_CHECK( MarkAttachClassDef ); |
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| 216 | if ( MarkAttachClassDef ) |
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| 217 | otv_ClassDef_validate( table + MarkAttachClassDef, valid ); |
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| 218 | } |
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| 219 | |||
| 220 | FT_TRACE4(( "\n" )); |
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| 221 | } |
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| 222 | |||
| 223 | |||
| 224 | /* END */ |