1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/textandloc/fontservices/textshaperplugin/IcuSource/layout/PairPositioningSubtables.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,150 @@
     1.4 +/*
     1.5 + *
     1.6 + * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
     1.7 + *
     1.8 + */
     1.9 +
    1.10 +#include "LETypes.h"
    1.11 +#include "LEFontInstance.h"
    1.12 +#include "OpenTypeTables.h"
    1.13 +#include "GlyphPositioningTables.h"
    1.14 +#include "PairPositioningSubtables.h"
    1.15 +#include "ValueRecords.h"
    1.16 +#include "GlyphIterator.h"
    1.17 +#include "OpenTypeUtilities.h"
    1.18 +#include "LESwaps.h"
    1.19 +
    1.20 +U_NAMESPACE_BEGIN
    1.21 +
    1.22 +le_uint32 PairPositioningSubtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const
    1.23 +{
    1.24 +    switch(SWAPW(subtableFormat))
    1.25 +    {
    1.26 +    case 0:
    1.27 +        return 0;
    1.28 +
    1.29 +    case 1:
    1.30 +    {
    1.31 +        const PairPositioningFormat1Subtable *subtable = (const PairPositioningFormat1Subtable *) this;
    1.32 +
    1.33 +        return subtable->process(glyphIterator, fontInstance);
    1.34 +    }
    1.35 +
    1.36 +    case 2:
    1.37 +    {
    1.38 +        const PairPositioningFormat2Subtable *subtable = (const PairPositioningFormat2Subtable *) this;
    1.39 +
    1.40 +        return subtable->process(glyphIterator, fontInstance);
    1.41 +    }
    1.42 +
    1.43 +    default:
    1.44 +        return 0;
    1.45 +    }
    1.46 +}
    1.47 +
    1.48 +le_uint32 PairPositioningFormat1Subtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const
    1.49 +{
    1.50 +    LEGlyphID firstGlyph = glyphIterator->getCurrGlyphID();
    1.51 +    le_int32 coverageIndex = getGlyphCoverage(firstGlyph);
    1.52 +    GlyphIterator tempIterator(*glyphIterator);
    1.53 +
    1.54 +    if (coverageIndex >= 0 && glyphIterator->next()) {
    1.55 +        Offset pairSetTableOffset = SWAPW(pairSetTableOffsetArray[coverageIndex]);
    1.56 +        PairSetTable *pairSetTable = (PairSetTable *) ((char *) this + pairSetTableOffset);
    1.57 +        le_uint16 pairValueCount = SWAPW(pairSetTable->pairValueCount);
    1.58 +        le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1));
    1.59 +        le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2));
    1.60 +        le_int16 recordSize = sizeof(PairValueRecord) - sizeof(ValueRecord) + valueRecord1Size + valueRecord2Size;
    1.61 +        LEGlyphID secondGlyph = glyphIterator->getCurrGlyphID();
    1.62 +        const PairValueRecord *pairValueRecord = NULL;
    1.63 +
    1.64 +        if (pairValueCount != 0) {
    1.65 +            pairValueRecord = findPairValueRecord((TTGlyphID) LE_GET_GLYPH(secondGlyph), pairSetTable->pairValueRecordArray, pairValueCount, recordSize);
    1.66 +        }
    1.67 +
    1.68 +        if (pairValueRecord == NULL) {
    1.69 +            return 0;
    1.70 +        }
    1.71 +
    1.72 +        if (valueFormat1 != 0) {
    1.73 +            pairValueRecord->valueRecord1.adjustPosition(SWAPW(valueFormat1), (char *) this, tempIterator, fontInstance);
    1.74 +        }
    1.75 +
    1.76 +        if (valueFormat2 != 0) {
    1.77 +            const ValueRecord *valueRecord2 = (const ValueRecord *) ((char *) &pairValueRecord->valueRecord1 + valueRecord1Size);
    1.78 +
    1.79 +            valueRecord2->adjustPosition(SWAPW(valueFormat2), (char *) this, *glyphIterator, fontInstance);
    1.80 +        }
    1.81 +
    1.82 +        return 2;
    1.83 +    }
    1.84 +
    1.85 +    return 0;
    1.86 +}
    1.87 +
    1.88 +le_uint32 PairPositioningFormat2Subtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const
    1.89 +{
    1.90 +    LEGlyphID firstGlyph = glyphIterator->getCurrGlyphID();
    1.91 +    le_int32 coverageIndex = getGlyphCoverage(firstGlyph);
    1.92 +    GlyphIterator tempIterator(*glyphIterator);
    1.93 +
    1.94 +    if (coverageIndex >= 0 && glyphIterator->next()) {
    1.95 +        LEGlyphID secondGlyph = glyphIterator->getCurrGlyphID();
    1.96 +        const ClassDefinitionTable *classDef1 = (const ClassDefinitionTable *) ((char *) this + SWAPW(classDef1Offset));
    1.97 +        const ClassDefinitionTable *classDef2 = (const ClassDefinitionTable *) ((char *) this + SWAPW(classDef2Offset));
    1.98 +        le_int32 class1 = classDef1->getGlyphClass(firstGlyph);
    1.99 +        le_int32 class2 = classDef2->getGlyphClass(secondGlyph);
   1.100 +        le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1));
   1.101 +        le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2));
   1.102 +        le_int16 class2RecordSize = valueRecord1Size + valueRecord2Size;
   1.103 +        le_int16 class1RecordSize = class2RecordSize * SWAPW(class2Count);
   1.104 +        const Class1Record *class1Record = (const Class1Record *) ((char *) class1RecordArray + (class1RecordSize * class1));
   1.105 +        const Class2Record *class2Record = (const Class2Record *) ((char *) class1Record->class2RecordArray + (class2RecordSize * class2));
   1.106 +
   1.107 +
   1.108 +        if (valueFormat1 != 0) {
   1.109 +            class2Record->valueRecord1.adjustPosition(SWAPW(valueFormat1), (char *) this, tempIterator, fontInstance);
   1.110 +        }
   1.111 +
   1.112 +        if (valueFormat2 != 0) {
   1.113 +            const ValueRecord *valueRecord2 = (const ValueRecord *) ((char *) &class2Record->valueRecord1 + valueRecord1Size);
   1.114 +
   1.115 +            valueRecord2->adjustPosition(SWAPW(valueFormat2), (const char *) this, *glyphIterator, fontInstance);
   1.116 +        }
   1.117 +
   1.118 +        return 2;
   1.119 +    }
   1.120 +
   1.121 +    return 0;
   1.122 +}
   1.123 +
   1.124 +const PairValueRecord *PairPositioningFormat1Subtable::findPairValueRecord(TTGlyphID glyphID, const PairValueRecord *records, le_uint16 recordCount, le_uint16 recordSize) const
   1.125 +{
   1.126 +    le_uint8 bit = OpenTypeUtilities::highBit(recordCount);
   1.127 +    le_uint16 power = 1 << bit;
   1.128 +    le_uint16 extra = (recordCount - power) * recordSize;
   1.129 +    le_uint16 probe = power * recordSize;
   1.130 +    const PairValueRecord *record = records;
   1.131 +    const PairValueRecord *trial = (const PairValueRecord *) ((char *) record + extra);
   1.132 +
   1.133 +    if (SWAPW(trial->secondGlyph) <= glyphID) {
   1.134 +        record = trial;
   1.135 +    }
   1.136 +
   1.137 +    while (probe > recordSize) {
   1.138 +        probe >>= 1;
   1.139 +        trial = (const PairValueRecord *) ((char *) record + probe);
   1.140 +
   1.141 +        if (SWAPW(trial->secondGlyph) <= glyphID) {
   1.142 +            record = trial;
   1.143 +        }
   1.144 +    }
   1.145 +
   1.146 +    if (SWAPW(record->secondGlyph) == glyphID) {
   1.147 +        return record;
   1.148 +    }
   1.149 +
   1.150 +    return NULL;
   1.151 +}
   1.152 +
   1.153 +U_NAMESPACE_END