| /* |
| * @(#)PairPositioningSubtables.cpp 1.7 00/03/15 |
| * |
| * (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "LEFontInstance.h" |
| #include "OpenTypeTables.h" |
| #include "GlyphPositioningTables.h" |
| #include "PairPositioningSubtables.h" |
| #include "ValueRecords.h" |
| #include "GlyphIterator.h" |
| #include "GlyphPositionAdjustments.h" |
| #include "OpenTypeUtilities.h" |
| #include "LESwaps.h" |
| |
| le_uint32 PairPositioningSubtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const |
| { |
| switch(SWAPW(subtableFormat)) |
| { |
| case 0: |
| return 0; |
| |
| case 1: |
| { |
| const PairPositioningFormat1Subtable *subtable = (const PairPositioningFormat1Subtable *) this; |
| |
| return subtable->process(glyphIterator, fontInstance); |
| } |
| |
| case 2: |
| { |
| const PairPositioningFormat2Subtable *subtable = (const PairPositioningFormat2Subtable *) this; |
| |
| return subtable->process(glyphIterator, fontInstance); |
| } |
| |
| default: |
| return 0; |
| } |
| } |
| |
| le_uint32 PairPositioningFormat1Subtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const |
| { |
| LEGlyphID firstGlyph = (LEGlyphID) glyphIterator->getCurrGlyphID(); |
| le_int32 coverageIndex = getGlyphCoverage(firstGlyph); |
| GlyphIterator tempIterator(*glyphIterator); |
| |
| if (coverageIndex >= 0 && glyphIterator->next()) { |
| Offset pairSetTableOffset = SWAPW(pairSetTableOffsetArray[coverageIndex]); |
| PairSetTable *pairSetTable = (PairSetTable *) ((char *) this + pairSetTableOffset); |
| le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1)); |
| le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2)); |
| le_int16 recordSize = sizeof(PairValueRecord) - sizeof(ValueRecord) + valueRecord1Size + valueRecord2Size; |
| LEGlyphID secondGlyph = (LEGlyphID) glyphIterator->getCurrGlyphID(); |
| const PairValueRecord *pairValueRecord = |
| findPairValueRecord(secondGlyph, pairSetTable->pairValueRecordArray, SWAPW(pairSetTable->pairValueCount), recordSize); |
| |
| if (pairValueRecord == NULL) { |
| return 0; |
| } |
| |
| if (valueFormat1 != 0) { |
| GlyphPositionAdjustment adjustment; |
| |
| tempIterator.getCurrGlyphPositionAdjustment(adjustment); |
| pairValueRecord->valueRecord1.adjustPosition(SWAPW(valueFormat1), (char *) this, adjustment, fontInstance); |
| tempIterator.setCurrGlyphPositionAdjustment(&adjustment); |
| } |
| |
| if (valueFormat2 != 0) { |
| const ValueRecord *valueRecord2 = (const ValueRecord *) ((char *) &pairValueRecord->valueRecord1 + valueRecord1Size); |
| GlyphPositionAdjustment adjustment; |
| |
| glyphIterator->getCurrGlyphPositionAdjustment(adjustment); |
| valueRecord2->adjustPosition(SWAPW(valueFormat2), (char *) this, adjustment, fontInstance); |
| glyphIterator->setCurrGlyphPositionAdjustment(&adjustment); |
| } |
| |
| return 2; |
| } |
| |
| return 0; |
| } |
| |
| le_uint32 PairPositioningFormat2Subtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const |
| { |
| LEGlyphID firstGlyph = (LEGlyphID) glyphIterator->getCurrGlyphID(); |
| le_int32 coverageIndex = getGlyphCoverage(firstGlyph); |
| GlyphIterator tempIterator(*glyphIterator); |
| |
| if (coverageIndex >= 0 && glyphIterator->next()) { |
| LEGlyphID secondGlyph = (LEGlyphID) glyphIterator->getCurrGlyphID(); |
| const ClassDefinitionTable *classDef1 = (const ClassDefinitionTable *) ((char *) this + SWAPW(classDef1Offset)); |
| const ClassDefinitionTable *classDef2 = (const ClassDefinitionTable *) ((char *) this + SWAPW(classDef2Offset)); |
| le_int32 class1 = classDef1->getGlyphClass(firstGlyph); |
| le_int32 class2 = classDef2->getGlyphClass(secondGlyph); |
| le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1)); |
| le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2)); |
| le_int16 class2RecordSize = valueRecord1Size + valueRecord2Size; |
| le_int16 class1RecordSize = class2RecordSize * SWAPW(class2Count); |
| const Class1Record *class1Record = (const Class1Record *) ((char *) class1RecordArray + (class1RecordSize * class1)); |
| const Class2Record *class2Record = (const Class2Record *) ((char *) class1Record->class2RecordArray + (class2RecordSize * class2)); |
| |
| |
| if (valueFormat1 != 0) { |
| GlyphPositionAdjustment adjustment; |
| |
| tempIterator.getCurrGlyphPositionAdjustment(adjustment); |
| class2Record->valueRecord1.adjustPosition(SWAPW(valueFormat1), (char *) this, adjustment, fontInstance); |
| tempIterator.setCurrGlyphPositionAdjustment(&adjustment); |
| } |
| |
| if (valueFormat2 != 0) { |
| const ValueRecord *valueRecord2 = (const ValueRecord *) ((char *) &class2Record->valueRecord1 + valueRecord1Size); |
| GlyphPositionAdjustment adjustment; |
| |
| glyphIterator->getCurrGlyphPositionAdjustment(adjustment); |
| valueRecord2->adjustPosition(SWAPW(valueFormat2), (const char *) this, adjustment, fontInstance); |
| glyphIterator->setCurrGlyphPositionAdjustment(&adjustment); |
| } |
| |
| return 2; |
| } |
| |
| return 0; |
| } |
| |
| const PairValueRecord *PairPositioningFormat1Subtable::findPairValueRecord(LEGlyphID glyphID, const PairValueRecord *records, le_uint16 recordCount, le_uint16 recordSize) const |
| { |
| le_uint8 bit = OpenTypeUtilities::highBit(recordCount); |
| le_uint16 power = 1 << bit; |
| le_uint16 extra = (recordCount - power) * recordSize; |
| le_uint16 probe = power * recordSize; |
| const PairValueRecord *record = records; |
| const PairValueRecord *trial = (const PairValueRecord *) ((char *) record + extra); |
| |
| if (SWAPW(trial->secondGlyph) <= glyphID) { |
| record = trial; |
| } |
| |
| while (probe > recordSize) { |
| probe >>= 1; |
| trial = (const PairValueRecord *) ((char *) record + probe); |
| |
| if (SWAPW(trial->secondGlyph) <= glyphID) { |
| record = trial; |
| } |
| } |
| |
| if (SWAPW(record->secondGlyph) == glyphID) { |
| return record; |
| } |
| |
| return NULL; |
| } |