69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
|
/*
|
||
|
|
* HanLayoutEngine.cpp: OpenType processing for Han fonts.
|
||
|
|
*
|
||
|
|
* (C) Copyright IBM Corp. 1998 - 2003 - All Rights Reserved.
|
||
|
|
*
|
||
|
|
* $Source: /xsrl/Nsvn/icu/icu/source/layout/HanLayoutEngine.cpp,v $ $Date: 2003/04/12 00:37:11 $ $Revision: 1.1 $
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "LETypes.h"
|
||
|
|
#include "LEScripts.h"
|
||
|
|
#include "LELanguages.h"
|
||
|
|
|
||
|
|
#include "LayoutEngine.h"
|
||
|
|
#include "OpenTypeLayoutEngine.h"
|
||
|
|
#include "HanLayoutEngine.h"
|
||
|
|
#include "ScriptAndLanguageTags.h"
|
||
|
|
|
||
|
|
const char HanOpenTypeLayoutEngine::fgClassID=0;
|
||
|
|
|
||
|
|
HanOpenTypeLayoutEngine::HanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
|
||
|
|
const GlyphSubstitutionTableHeader *gsubTable)
|
||
|
|
: OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable)
|
||
|
|
{
|
||
|
|
// nothing else to do...
|
||
|
|
}
|
||
|
|
|
||
|
|
HanOpenTypeLayoutEngine::~HanOpenTypeLayoutEngine()
|
||
|
|
{
|
||
|
|
// nothing to do
|
||
|
|
}
|
||
|
|
|
||
|
|
const LETag emptyTag = 0x00000000;
|
||
|
|
|
||
|
|
const LETag loclFeatureTag = LE_MAKE_TAG('l', 'o', 'c', 'l');
|
||
|
|
const LETag smplFeatureTag = LE_MAKE_TAG('s', 'm', 'p', 'l');
|
||
|
|
const LETag tradFeatureTag = LE_MAKE_TAG('t', 'r', 'a', 'd');
|
||
|
|
|
||
|
|
const LETag features[] = {loclFeatureTag, emptyTag};
|
||
|
|
|
||
|
|
le_int32 HanOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
|
||
|
|
LEUnicode *&outChars, le_int32 *&charIndices, const LETag **&featureTags, LEErrorCode &success)
|
||
|
|
{
|
||
|
|
if (LE_FAILURE(success)) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
|
||
|
|
success = LE_ILLEGAL_ARGUMENT_ERROR;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
featureTags = LE_NEW_ARRAY(const LETag *, count);
|
||
|
|
|
||
|
|
if (featureTags == NULL) {
|
||
|
|
success = LE_MEMORY_ALLOCATION_ERROR;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// FIXME: do we want to add the 'trad' feature for 'ZHT' and the
|
||
|
|
// 'smpl' feature for 'ZHS'? If we do this, we can remove the exact
|
||
|
|
// flag from the language tag lookups, so we can use these features
|
||
|
|
// with the default LangSys...
|
||
|
|
for (le_int32 i = 0; i < count; i += 1) {
|
||
|
|
featureTags[i] = features;
|
||
|
|
}
|
||
|
|
|
||
|
|
return count;
|
||
|
|
}
|