62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*
|
|
* @(#)Features.cpp 1.4 00/03/15
|
|
*
|
|
* (C) Copyright IBM Corp. 1998-2010 - All Rights Reserved
|
|
*
|
|
*/
|
|
|
|
#include "LETypes.h"
|
|
#include "OpenTypeUtilities.h"
|
|
#include "OpenTypeTables.h"
|
|
#include "ICUFeatures.h"
|
|
#include "LESwaps.h"
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
const FeatureTable *FeatureListTable::getFeatureTable(le_uint16 featureIndex, LETag *featureTag) const
|
|
{
|
|
if (featureIndex >= SWAPW(featureCount)) {
|
|
return 0;
|
|
}
|
|
|
|
Offset featureTableOffset = featureRecordArray[featureIndex].featureTableOffset;
|
|
|
|
*featureTag = SWAPT(featureRecordArray[featureIndex].featureTag);
|
|
|
|
return (const FeatureTable *) ((char *) this + SWAPW(featureTableOffset));
|
|
}
|
|
|
|
/*
|
|
* Note: according to the OpenType Spec. v 1.4, the entries in the Feature
|
|
* List Table are sorted alphabetically by feature tag; however, there seem
|
|
* to be some fonts which have an unsorted list; that's why the binary search
|
|
* is #if 0'd out and replaced by a linear search.
|
|
*
|
|
* Also note: as of ICU 2.6, this method isn't called anyhow...
|
|
*/
|
|
const FeatureTable *FeatureListTable::getFeatureTable(LETag featureTag) const
|
|
{
|
|
#if 0
|
|
Offset featureTableOffset =
|
|
OpenTypeUtilities::getTagOffset(featureTag, (TagAndOffsetRecord *) featureRecordArray, SWAPW(featureCount));
|
|
|
|
if (featureTableOffset == 0) {
|
|
return 0;
|
|
}
|
|
|
|
return (const FeatureTable *) ((char *) this + SWAPW(featureTableOffset));
|
|
#else
|
|
int count = SWAPW(featureCount);
|
|
|
|
for (int i = 0; i < count; i += 1) {
|
|
if (SWAPT(featureRecordArray[i].featureTag) == featureTag) {
|
|
return (const FeatureTable *) ((char *) this + SWAPW(featureRecordArray[i].featureTableOffset));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
U_NAMESPACE_END
|