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/*
*
* (C) Copyright IBM Corp. 1998-2008 - All Rights Reserved
*
* Developed at DIT - Government of Bhutan
*
* Contact person: Pema Geyleg - <pema_geyleg@druknet.bt>
*
* This file is a modification of the ICU file KhmerReordering.cpp
* by Jens Herden and Javier Sola who have given all their possible rights to IBM and the Governement of Bhutan
* A first module for Dzongkha was developed by Karunakar under Panlocalisation funding.
* Assistance for this module has been received from Namgay Thinley, Christopher Fynn and Javier Sola
*
*/
#include "OpenTypeLayoutEngine.h"
#include "TibetanLayoutEngine.h"
#include "LEGlyphStorage.h"
#include "TibetanReordering.h"
U_NAMESPACE_BEGIN
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TibetanOpenTypeLayoutEngine)
TibetanOpenTypeLayoutEngine::TibetanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable, LEErrorCode &success)
: OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success)
{
fFeatureMap = TibetanReordering::getFeatureMap(fFeatureMapCount);
fFeatureOrder = TRUE;
}
TibetanOpenTypeLayoutEngine::TibetanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
le_int32 typoFlags, LEErrorCode &success)
: OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success)
{
fFeatureMap = TibetanReordering::getFeatureMap(fFeatureMapCount);
fFeatureOrder = TRUE;
}
TibetanOpenTypeLayoutEngine::~TibetanOpenTypeLayoutEngine()
{
// nothing to do
}
// Input: characters
// Output: characters, char indices, tags
// Returns: output character count
le_int32 TibetanOpenTypeLayoutEngine::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;
}
le_int32 worstCase = count * 3; // worst case is 3 for Khmer TODO check if 2 is enough
outChars = LE_NEW_ARRAY(LEUnicode, worstCase);
if (outChars == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success);
glyphStorage.allocateAuxData(success);
if (LE_FAILURE(success)) {
LE_DELETE_ARRAY(outChars);
return 0;
}
// NOTE: assumes this allocates featureTags...
// (probably better than doing the worst case stuff here...)
le_int32 outCharCount = TibetanReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage);
glyphStorage.adoptGlyphCount(outCharCount);
return outCharCount;
}
U_NAMESPACE_END