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