sl@0: 
sl@0: /*
sl@0:  *
sl@0:  * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include "LETypes.h"
sl@0: #include "LayoutEngine.h"
sl@0: #include "GXLayoutEngine.h"
sl@0: #include "LEGlyphStorage.h"
sl@0: 
sl@0: #include "MorphTables.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: UOBJECT_DEFINE_RTTI_IMPLEMENTATION(GXLayoutEngine)
sl@0: 
sl@0: GXLayoutEngine::GXLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, const MorphTableHeader *morphTable) 
sl@0:     : LayoutEngine(fontInstance, scriptCode, languageCode, 0), fMorphTable(morphTable)
sl@0: {
sl@0:     // nothing else to do?
sl@0: }
sl@0: 
sl@0: GXLayoutEngine::~GXLayoutEngine()
sl@0: {
sl@0:     reset();
sl@0: }
sl@0: 
sl@0: // apply 'mort' table
sl@0: le_int32 GXLayoutEngine::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success)
sl@0: {
sl@0:     if (LE_FAILURE(success)) {
sl@0:         return 0;
sl@0:     }
sl@0: 
sl@0:     if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
sl@0:         success = LE_ILLEGAL_ARGUMENT_ERROR;
sl@0:         return 0;
sl@0:     }
sl@0: 
sl@0:     mapCharsToGlyphs(chars, offset, count, FALSE, rightToLeft, glyphStorage, success);
sl@0: 
sl@0:     if (LE_FAILURE(success)) {
sl@0:         return 0;
sl@0:     }
sl@0: 
sl@0:     fMorphTable->process(glyphStorage);
sl@0: 
sl@0:     return count;
sl@0: }
sl@0: 
sl@0: // apply positional tables
sl@0: void GXLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool /*reverse*/,
sl@0:                                           LEGlyphStorage &/*glyphStorage*/, LEErrorCode &success)
sl@0: {
sl@0:     if (LE_FAILURE(success)) {
sl@0:         return;
sl@0:     }
sl@0: 
sl@0:     if (chars == NULL || offset < 0 || count < 0) {
sl@0:         success = LE_ILLEGAL_ARGUMENT_ERROR;
sl@0:         return;
sl@0:     }
sl@0: 
sl@0:     // FIXME: no positional processing yet...
sl@0: }
sl@0: 
sl@0: U_NAMESPACE_END