Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* gxvmorx5.c */ |
| 4 | /* */ |
| 5 | /* TrueTypeGX/AAT morx table validation */ |
| 6 | /* body for type5 (Contextual Glyph Insertion) subtable. */ |
| 7 | /* */ |
| 8 | /* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */ |
| 9 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
| 10 | /* */ |
| 11 | /* This file is part of the FreeType project, and may only be used, */ |
| 12 | /* modified, and distributed under the terms of the FreeType project */ |
| 13 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
| 14 | /* this file you indicate that you have read the license and */ |
| 15 | /* understand and accept it fully. */ |
| 16 | /* */ |
| 17 | /***************************************************************************/ |
| 18 | |
| 19 | /***************************************************************************/ |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 20 | /* */ |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 21 | /* gxvalid is derived from both gxlayout module and otvalid module. */ |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 22 | /* Development of gxlayout is supported by the Information-technology */ |
| 23 | /* Promotion Agency(IPA), Japan. */ |
| 24 | /* */ |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 25 | /***************************************************************************/ |
| 26 | |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 27 | |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 28 | #include "gxvmorx.h" |
| 29 | |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 30 | |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 31 | /*************************************************************************/ |
| 32 | /* */ |
| 33 | /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
| 34 | /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
| 35 | /* messages during execution. */ |
| 36 | /* */ |
| 37 | #undef FT_COMPONENT |
| 38 | #define FT_COMPONENT trace_gxvmorx |
| 39 | |
| 40 | |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 41 | /* |
| 42 | * `morx' subtable type5 (Contextual Glyph Insertion) |
| 43 | * has format of a StateTable with insertion-glyph-list |
| 44 | * without name. However, the 32bit offset from the head |
| 45 | * of subtable to the i-g-l is given after `entryTable', |
| 46 | * without variable name specification (the existence of |
| 47 | * this offset to the table is different from mort type5). |
| 48 | */ |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 49 | |
| 50 | |
| 51 | typedef struct GXV_morx_subtable_type5_StateOptRec_ |
| 52 | { |
| 53 | FT_ULong insertionGlyphList; |
| 54 | FT_ULong insertionGlyphList_length; |
| 55 | |
| 56 | } GXV_morx_subtable_type5_StateOptRec, |
| 57 | *GXV_morx_subtable_type5_StateOptRecData; |
| 58 | |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 59 | |
| 60 | #define GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE \ |
| 61 | ( GXV_STATETABLE_HEADER_SIZE + 4 ) |
| 62 | |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 63 | |
| 64 | static void |
| 65 | gxv_morx_subtable_type5_insertionGlyphList_load( FT_Bytes table, |
| 66 | FT_Bytes limit, |
| 67 | GXV_Validator valid ) |
| 68 | { |
| 69 | FT_Bytes p = table; |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 70 | |
| 71 | GXV_morx_subtable_type5_StateOptRecData optdata = |
Werner Lemberg | 99aa14c | 2005-09-05 19:31:27 +0000 | [diff] [blame] | 72 | (GXV_morx_subtable_type5_StateOptRecData)valid->xstatetable.optdata; |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 73 | |
| 74 | |
| 75 | GXV_LIMIT_CHECK( 4 ); |
| 76 | optdata->insertionGlyphList = FT_NEXT_ULONG( p ); |
| 77 | } |
| 78 | |
| 79 | |
| 80 | static void |
| 81 | gxv_morx_subtable_type5_subtable_setup( FT_ULong table_size, |
| 82 | FT_ULong classTable, |
| 83 | FT_ULong stateArray, |
| 84 | FT_ULong entryTable, |
| 85 | FT_ULong* classTable_length_p, |
| 86 | FT_ULong* stateArray_length_p, |
| 87 | FT_ULong* entryTable_length_p, |
| 88 | GXV_Validator valid ) |
| 89 | { |
| 90 | FT_ULong o[4]; |
| 91 | FT_ULong* l[4]; |
| 92 | FT_ULong buff[5]; |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 93 | |
| 94 | GXV_morx_subtable_type5_StateOptRecData optdata = |
Werner Lemberg | 99aa14c | 2005-09-05 19:31:27 +0000 | [diff] [blame] | 95 | (GXV_morx_subtable_type5_StateOptRecData)valid->xstatetable.optdata; |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 96 | |
| 97 | |
| 98 | o[0] = classTable; |
| 99 | o[1] = stateArray; |
| 100 | o[2] = entryTable; |
| 101 | o[3] = optdata->insertionGlyphList; |
| 102 | l[0] = classTable_length_p; |
| 103 | l[1] = stateArray_length_p; |
| 104 | l[2] = entryTable_length_p; |
| 105 | l[3] = &(optdata->insertionGlyphList_length); |
| 106 | |
| 107 | gxv_set_length_by_ulong_offset( o, l, buff, 4, table_size, valid ); |
| 108 | } |
| 109 | |
| 110 | |
| 111 | static void |
| 112 | gxv_morx_subtable_type5_InsertList_validate( FT_UShort index, |
| 113 | FT_UShort count, |
| 114 | FT_Bytes table, |
| 115 | FT_Bytes limit, |
| 116 | GXV_Validator valid ) |
| 117 | { |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 118 | FT_Bytes p = table + index * 2; |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 119 | |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 120 | |
| 121 | while ( p < table + count * 2 + index * 2 ) |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 122 | { |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 123 | FT_UShort insert_glyphID; |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 124 | |
| 125 | |
| 126 | GXV_LIMIT_CHECK( 2 ); |
| 127 | insert_glyphID = FT_NEXT_USHORT( p ); |
| 128 | GXV_TRACE(( " 0x%04x", insert_glyphID )); |
| 129 | } |
| 130 | |
| 131 | GXV_TRACE(( "\n" )); |
| 132 | } |
| 133 | |
| 134 | |
| 135 | static void |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 136 | gxv_morx_subtable_type5_entry_validate( |
| 137 | FT_UShort state, |
| 138 | FT_UShort flags, |
| 139 | GXV_StateTable_GlyphOffsetDesc glyphOffset, |
| 140 | FT_Bytes table, |
| 141 | FT_Bytes limit, |
| 142 | GXV_Validator valid ) |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 143 | { |
| 144 | FT_Bool setMark; |
| 145 | FT_Bool dontAdvance; |
| 146 | FT_Bool currentIsKashidaLike; |
| 147 | FT_Bool markedIsKashidaLike; |
| 148 | FT_Bool currentInsertBefore; |
| 149 | FT_Bool markedInsertBefore; |
David Turner | 18e4443 | 2005-09-23 13:22:10 +0000 | [diff] [blame] | 150 | FT_Byte currentInsertCount; |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 151 | FT_Byte markedInsertCount; |
| 152 | FT_Byte currentInsertList; |
| 153 | FT_UShort markedInsertList; |
| 154 | |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 155 | FT_UNUSED( state ); |
| 156 | |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 157 | |
Werner Lemberg | 7c25946 | 2005-09-28 07:34:45 +0000 | [diff] [blame] | 158 | setMark = FT_BOOL( ( flags >> 15 ) & 1 ); |
| 159 | dontAdvance = FT_BOOL( ( flags >> 14 ) & 1 ); |
| 160 | currentIsKashidaLike = FT_BOOL( ( flags >> 13 ) & 1 ); |
| 161 | markedIsKashidaLike = FT_BOOL( ( flags >> 12 ) & 1 ); |
| 162 | currentInsertBefore = FT_BOOL( ( flags >> 11 ) & 1 ); |
| 163 | markedInsertBefore = FT_BOOL( ( flags >> 10 ) & 1 ); |
| 164 | |
| 165 | currentInsertCount = (FT_Byte)( ( flags >> 5 ) & 0x1F ); |
| 166 | markedInsertCount = (FT_Byte)( flags & 0x001F ); |
| 167 | |
| 168 | currentInsertList = (FT_Byte) ( glyphOffset.ul >> 16 ); |
| 169 | markedInsertList = (FT_UShort)( glyphOffset.ul ); |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 170 | |
| 171 | if ( currentInsertList && 0 != currentInsertCount ) |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 172 | gxv_morx_subtable_type5_InsertList_validate( currentInsertList, |
| 173 | currentInsertCount, |
| 174 | table, limit, |
| 175 | valid ); |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 176 | |
| 177 | if ( markedInsertList && 0 != markedInsertCount ) |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 178 | gxv_morx_subtable_type5_InsertList_validate( markedInsertList, |
| 179 | markedInsertCount, |
| 180 | table, limit, |
| 181 | valid ); |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | |
Werner Lemberg | 99aa14c | 2005-09-05 19:31:27 +0000 | [diff] [blame] | 185 | FT_LOCAL_DEF( void ) |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 186 | gxv_morx_subtable_type5_validate( FT_Bytes table, |
| 187 | FT_Bytes limit, |
| 188 | GXV_Validator valid ) |
| 189 | { |
| 190 | FT_Bytes p = table; |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 191 | |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 192 | GXV_morx_subtable_type5_StateOptRec et_rec; |
| 193 | GXV_morx_subtable_type5_StateOptRecData et = &et_rec; |
| 194 | |
| 195 | |
| 196 | GXV_NAME_ENTER( "morx chain subtable type5 (Glyph Insertion)" ); |
| 197 | |
| 198 | GXV_LIMIT_CHECK( GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE ); |
| 199 | |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 200 | valid->xstatetable.optdata = |
| 201 | et; |
| 202 | valid->xstatetable.optdata_load_func = |
| 203 | gxv_morx_subtable_type5_insertionGlyphList_load; |
| 204 | valid->xstatetable.subtable_setup_func = |
| 205 | gxv_morx_subtable_type5_subtable_setup; |
| 206 | valid->xstatetable.entry_glyphoffset_fmt = |
| 207 | GXV_GLYPHOFFSET_ULONG; |
| 208 | valid->xstatetable.entry_validate_func = |
| 209 | gxv_morx_subtable_type5_entry_validate; |
| 210 | |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 211 | gxv_XStateTable_validate( p, limit, valid ); |
Werner Lemberg | 4a7f0b1 | 2005-09-01 07:33:03 +0000 | [diff] [blame] | 212 | |
Suzuki, Toshiya (鈴木俊哉) | a438621 | 2005-08-24 04:31:31 +0000 | [diff] [blame] | 213 | GXV_EXIT; |
| 214 | } |
| 215 | |
| 216 | |
| 217 | /* END */ |