69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
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/*
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* @(#)GXLayoutEngine.cpp 1.5 00/03/15
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*
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* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
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*
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*/
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#include "LETypes.h"
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#include "LayoutEngine.h"
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#include "GXLayoutEngine.h"
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#include "MorphTables.h"
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U_NAMESPACE_BEGIN
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const char GXLayoutEngine::fgClassID=0;
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GXLayoutEngine::GXLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, const MorphTableHeader *morphTable)
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: LayoutEngine(fontInstance, scriptCode, languageCode), fMorphTable(morphTable)
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{
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// nothing else to do?
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}
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GXLayoutEngine::~GXLayoutEngine()
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{
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reset();
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}
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// apply 'mort' table
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le_int32 GXLayoutEngine::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphID *&glyphs, le_int32 *&charIndices, 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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mapCharsToGlyphs(chars, offset, count, false, rightToLeft, glyphs, charIndices, success);
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if (LE_FAILURE(success)) {
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return 0;
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}
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fMorphTable->process(glyphs, charIndices, count);
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return count;
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}
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// apply positional tables
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void GXLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, LEGlyphID glyphs[], le_int32 glyphCount, float positions[], LEErrorCode &success)
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{
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if (LE_FAILURE(success)) {
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return;
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}
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if (chars == NULL || glyphs == NULL || positions == NULL || offset < 0 || count < 0 || glyphCount < 0) {
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success = LE_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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// FIXME: no positional processing yet...
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}
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U_NAMESPACE_END
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