J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3 | * |
| 4 | * This code is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 only, as |
| 6 | * published by the Free Software Foundation. Sun designates this |
| 7 | * particular file as subject to the "Classpath" exception as provided |
| 8 | * by Sun in the LICENSE file that accompanied this code. |
| 9 | * |
| 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * version 2 for more details (a copy is included in the LICENSE file that |
| 14 | * accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License version |
| 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * |
| 28 | * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include "LETypes.h" |
| 33 | #include "LEFontInstance.h" |
| 34 | #include "OpenTypeTables.h" |
| 35 | #include "GlyphPositioningTables.h" |
| 36 | #include "PairPositioningSubtables.h" |
| 37 | #include "ValueRecords.h" |
| 38 | #include "GlyphIterator.h" |
| 39 | #include "OpenTypeUtilities.h" |
| 40 | #include "LESwaps.h" |
| 41 | |
| 42 | le_uint32 PairPositioningSubtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const |
| 43 | { |
| 44 | switch(SWAPW(subtableFormat)) |
| 45 | { |
| 46 | case 0: |
| 47 | return 0; |
| 48 | |
| 49 | case 1: |
| 50 | { |
| 51 | const PairPositioningFormat1Subtable *subtable = (const PairPositioningFormat1Subtable *) this; |
| 52 | |
| 53 | return subtable->process(glyphIterator, fontInstance); |
| 54 | } |
| 55 | |
| 56 | case 2: |
| 57 | { |
| 58 | const PairPositioningFormat2Subtable *subtable = (const PairPositioningFormat2Subtable *) this; |
| 59 | |
| 60 | return subtable->process(glyphIterator, fontInstance); |
| 61 | } |
| 62 | |
| 63 | default: |
| 64 | return 0; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | le_uint32 PairPositioningFormat1Subtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const |
| 69 | { |
| 70 | LEGlyphID firstGlyph = glyphIterator->getCurrGlyphID(); |
| 71 | le_int32 coverageIndex = getGlyphCoverage(firstGlyph); |
| 72 | GlyphIterator tempIterator(*glyphIterator); |
| 73 | |
| 74 | if (coverageIndex >= 0 && glyphIterator->next()) { |
| 75 | Offset pairSetTableOffset = SWAPW(pairSetTableOffsetArray[coverageIndex]); |
| 76 | PairSetTable *pairSetTable = (PairSetTable *) ((char *) this + pairSetTableOffset); |
| 77 | le_uint16 pairValueCount = SWAPW(pairSetTable->pairValueCount); |
| 78 | le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1)); |
| 79 | le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2)); |
| 80 | le_int16 recordSize = sizeof(PairValueRecord) - sizeof(ValueRecord) + valueRecord1Size + valueRecord2Size; |
| 81 | LEGlyphID secondGlyph = glyphIterator->getCurrGlyphID(); |
| 82 | const PairValueRecord *pairValueRecord = NULL; |
| 83 | |
| 84 | if (pairValueCount != 0) { |
| 85 | pairValueRecord = findPairValueRecord((TTGlyphID) LE_GET_GLYPH(secondGlyph), |
| 86 | pairSetTable->pairValueRecordArray, pairValueCount, recordSize); |
| 87 | } |
| 88 | |
| 89 | if (pairValueRecord == NULL) { |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | if (valueFormat1 != 0) { |
| 94 | pairValueRecord->valueRecord1.adjustPosition(SWAPW(valueFormat1), (char *) this, |
| 95 | tempIterator, fontInstance); |
| 96 | } |
| 97 | |
| 98 | if (valueFormat2 != 0) { |
| 99 | const ValueRecord *valueRecord2 = (const ValueRecord *) ((char *) &pairValueRecord->valueRecord1 + valueRecord1Size); |
| 100 | |
| 101 | valueRecord2->adjustPosition(SWAPW(valueFormat2), (char *) this, *glyphIterator, fontInstance); |
| 102 | } |
| 103 | |
| 104 | return 2; |
| 105 | } |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | le_uint32 PairPositioningFormat2Subtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const |
| 111 | { |
| 112 | LEGlyphID firstGlyph = glyphIterator->getCurrGlyphID(); |
| 113 | le_int32 coverageIndex = getGlyphCoverage(firstGlyph); |
| 114 | GlyphIterator tempIterator(*glyphIterator); |
| 115 | |
| 116 | if (coverageIndex >= 0 && glyphIterator->next()) { |
| 117 | LEGlyphID secondGlyph = glyphIterator->getCurrGlyphID(); |
| 118 | const ClassDefinitionTable *classDef1 = (const ClassDefinitionTable *) ((char *) this + SWAPW(classDef1Offset)); |
| 119 | const ClassDefinitionTable *classDef2 = (const ClassDefinitionTable *) ((char *) this + SWAPW(classDef2Offset)); |
| 120 | le_int32 class1 = classDef1->getGlyphClass(firstGlyph); |
| 121 | le_int32 class2 = classDef2->getGlyphClass(secondGlyph); |
| 122 | le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1)); |
| 123 | le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2)); |
| 124 | le_int16 class2RecordSize = valueRecord1Size + valueRecord2Size; |
| 125 | le_int16 class1RecordSize = class2RecordSize * SWAPW(class2Count); |
| 126 | const Class1Record *class1Record = (const Class1Record *) ((char *) class1RecordArray + (class1RecordSize * class1)); |
| 127 | const Class2Record *class2Record = (const Class2Record *) ((char *) class1Record->class2RecordArray + (class2RecordSize * class2)); |
| 128 | |
| 129 | |
| 130 | if (valueFormat1 != 0) { |
| 131 | class2Record->valueRecord1.adjustPosition(SWAPW(valueFormat1), (char *) this, tempIterator, fontInstance); |
| 132 | } |
| 133 | |
| 134 | if (valueFormat2 != 0) { |
| 135 | const ValueRecord *valueRecord2 = (const ValueRecord *) ((char *) &class2Record->valueRecord1 + valueRecord1Size); |
| 136 | |
| 137 | valueRecord2->adjustPosition(SWAPW(valueFormat2), (const char *) this, *glyphIterator, fontInstance); |
| 138 | } |
| 139 | |
| 140 | return 2; |
| 141 | } |
| 142 | |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | const PairValueRecord *PairPositioningFormat1Subtable::findPairValueRecord(TTGlyphID glyphID, const PairValueRecord *records, le_uint16 recordCount, le_uint16 recordSize) const |
| 147 | { |
| 148 | le_uint8 bit = OpenTypeUtilities::highBit(recordCount); |
| 149 | le_uint16 power = 1 << bit; |
| 150 | le_uint16 extra = (recordCount - power) * recordSize; |
| 151 | le_uint16 probe = power * recordSize; |
| 152 | const PairValueRecord *record = records; |
| 153 | const PairValueRecord *trial = (const PairValueRecord *) ((char *) record + extra); |
| 154 | |
| 155 | if (SWAPW(trial->secondGlyph) <= glyphID) { |
| 156 | record = trial; |
| 157 | } |
| 158 | |
| 159 | while (probe > recordSize) { |
| 160 | probe >>= 1; |
| 161 | trial = (const PairValueRecord *) ((char *) record + probe); |
| 162 | |
| 163 | if (SWAPW(trial->secondGlyph) <= glyphID) { |
| 164 | record = trial; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | if (SWAPW(record->secondGlyph) == glyphID) { |
| 169 | return record; |
| 170 | } |
| 171 | |
| 172 | return NULL; |
| 173 | } |