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ICU-5753 compute binary search header values because they are incorrect in some old fonts .

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X-SVN-Rev: 22126
This commit is contained in:
Eric Mader 2007-07-24 20:39:51 +00:00
parent b025efb767
commit 31b9b945db
1 changed files with 9 additions and 0 deletions
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9
icu4c/source/layout/KernTable.cpp
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@ -10,6 +10,7 @@
#include "LEGlyphStorage.h"
#include "LESwaps.h"
#include "OpenTypeUtilities.h"
#include <stdio.h>
@ -102,9 +103,17 @@ KernTable::KernTable(const LEFontInstance* font, const void* tableData)
const Subtable_0* table = (const Subtable_0*)((char*)subhead + KERN_SUBTABLE_HEADER_SIZE);
nPairs = SWAPW(table->nPairs);
#if 0 // some old fonts have bad values here...
searchRange = SWAPW(table->searchRange);
entrySelector = SWAPW(table->entrySelector);
rangeShift = SWAPW(table->rangeShift);
#else
entrySelector = OpenTypeUtilities::highBit(nPairs);
searchRange = (1 << entrySelector) * KERN_PAIRINFO_SIZE;
rangeShift = (nPairs * KERN_PAIRINFO_SIZE) - searchRange;
#endif
pairs = (const PairInfo*)((char*)table + KERN_SUBTABLE_0_HEADER_SIZE);
#if DEBUG