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