85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
/*
|
|
* HanLayoutEngine.cpp: OpenType processing for Han fonts.
|
|
*
|
|
* (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved.
|
|
*/
|
|
|
|
#include "LETypes.h"
|
|
#include "LEScripts.h"
|
|
#include "LELanguages.h"
|
|
|
|
#include "LayoutEngine.h"
|
|
#include "OpenTypeLayoutEngine.h"
|
|
#include "HanLayoutEngine.h"
|
|
#include "ScriptAndLanguageTags.h"
|
|
#include "LEGlyphStorage.h"
|
|
#include "OpenTypeTables.h"
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(HanOpenTypeLayoutEngine)
|
|
|
|
#define loclFeatureTag LE_LOCL_FEATURE_TAG
|
|
#define smplFeatureTag LE_SMPL_FEATURE_TAG
|
|
#define tradFeatureTag LE_TRAD_FEATURE_TAG
|
|
|
|
#define loclFeatureMask 0x80000000UL
|
|
#define smplFeatureMask 0x40000000UL
|
|
#define tradFeatureMask 0x20000000UL
|
|
|
|
static const FeatureMap featureMap[] =
|
|
{
|
|
{loclFeatureTag, loclFeatureMask},
|
|
{smplFeatureTag, smplFeatureMask},
|
|
{tradFeatureTag, tradFeatureMask}
|
|
};
|
|
|
|
static const le_int32 featureMapCount = LE_ARRAY_SIZE(featureMap);
|
|
|
|
#define features (loclFeatureMask)
|
|
|
|
HanOpenTypeLayoutEngine::HanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
|
|
le_int32 typoFlags, const LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable, LEErrorCode &success)
|
|
: OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success)
|
|
{
|
|
fFeatureMap = featureMap;
|
|
fFeatureMapCount = featureMapCount;
|
|
}
|
|
|
|
HanOpenTypeLayoutEngine::~HanOpenTypeLayoutEngine()
|
|
{
|
|
// nothing to do
|
|
}
|
|
|
|
le_int32 HanOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool /*rightToLeft*/,
|
|
LEUnicode *&/*outChars*/, LEGlyphStorage &glyphStorage, 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;
|
|
}
|
|
|
|
glyphStorage.allocateGlyphArray(count, FALSE, success);
|
|
glyphStorage.allocateAuxData(success);
|
|
|
|
if (LE_FAILURE(success)) {
|
|
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) {
|
|
glyphStorage.setAuxData(i, features, success);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
U_NAMESPACE_END
|