| author | sl@SLION-WIN7.fritz.box |
| Fri, 15 Jun 2012 03:10:57 +0200 | |
| changeset 0 | bde4ae8d615e |
| permissions | -rw-r--r-- |
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/* |
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* |
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* (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved |
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* |
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*/ |
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|
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#include "LETypes.h" |
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#include "OpenTypeTables.h" |
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#include "OpenTypeUtilities.h" |
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#include "CoverageTables.h" |
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#include "LESwaps.h" |
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|
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U_NAMESPACE_BEGIN |
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|
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le_int32 CoverageTable::getGlyphCoverage(LEGlyphID glyphID) const |
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{
|
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switch(SWAPW(coverageFormat)) |
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{
|
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case 0: |
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return -1; |
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|
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case 1: |
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{
|
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const CoverageFormat1Table *f1Table = (const CoverageFormat1Table *) this; |
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|
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return f1Table->getGlyphCoverage(glyphID); |
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} |
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|
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case 2: |
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{
|
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const CoverageFormat2Table *f2Table = (const CoverageFormat2Table *) this; |
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|
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return f2Table->getGlyphCoverage(glyphID); |
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} |
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|
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default: |
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return -1; |
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} |
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} |
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|
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le_int32 CoverageFormat1Table::getGlyphCoverage(LEGlyphID glyphID) const |
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{
|
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TTGlyphID ttGlyphID = (TTGlyphID) LE_GET_GLYPH(glyphID); |
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le_uint16 count = SWAPW(glyphCount); |
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le_uint8 bit = OpenTypeUtilities::highBit(count); |
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le_uint16 power = 1 << bit; |
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le_uint16 extra = count - power; |
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le_uint16 probe = power; |
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le_uint16 index = 0; |
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|
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if (SWAPW(glyphArray[extra]) <= ttGlyphID) {
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index = extra; |
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} |
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|
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while (probe > (1 << 0)) {
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probe >>= 1; |
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|
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if (SWAPW(glyphArray[index + probe]) <= ttGlyphID) {
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index += probe; |
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} |
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} |
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|
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if (SWAPW(glyphArray[index]) == ttGlyphID) {
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return index; |
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} |
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|
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return -1; |
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} |
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|
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le_int32 CoverageFormat2Table::getGlyphCoverage(LEGlyphID glyphID) const |
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{
|
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TTGlyphID ttGlyphID = (TTGlyphID) LE_GET_GLYPH(glyphID); |
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le_uint16 count = SWAPW(rangeCount); |
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le_int32 rangeIndex = |
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OpenTypeUtilities::getGlyphRangeIndex(ttGlyphID, rangeRecordArray, count); |
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|
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if (rangeIndex < 0) {
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return -1; |
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} |
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|
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TTGlyphID firstInRange = SWAPW(rangeRecordArray[rangeIndex].firstGlyph); |
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le_uint16 startCoverageIndex = SWAPW(rangeRecordArray[rangeIndex].rangeValue); |
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|
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return startCoverageIndex + (ttGlyphID - firstInRange); |
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} |
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|
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U_NAMESPACE_END |