0N/A/*
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A *
0N/A */
0N/A
0N/A/*
0N/A * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
0N/A *
0N/A */
0N/A
0N/A#include "LETypes.h"
0N/A#include "LEFontInstance.h"
0N/A#include "OpenTypeTables.h"
0N/A#include "AnchorTables.h"
0N/A#include "MarkArrays.h"
0N/A#include "GlyphPositioningTables.h"
0N/A#include "AttachmentPosnSubtables.h"
0N/A#include "MarkToLigaturePosnSubtables.h"
0N/A#include "GlyphIterator.h"
0N/A#include "LESwaps.h"
0N/A
1693N/AU_NAMESPACE_BEGIN
1693N/A
0N/ALEGlyphID MarkToLigaturePositioningSubtable::findLigatureGlyph(GlyphIterator *glyphIterator) const
0N/A{
0N/A if (glyphIterator->prev()) {
0N/A return glyphIterator->getCurrGlyphID();
0N/A }
0N/A
0N/A return 0xFFFF;
0N/A}
0N/A
5980N/Ale_int32 MarkToLigaturePositioningSubtable::process(const LETableReference &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
0N/A{
0N/A LEGlyphID markGlyph = glyphIterator->getCurrGlyphID();
5980N/A le_int32 markCoverage = getGlyphCoverage(base, (LEGlyphID) markGlyph, success);
0N/A
6371N/A if (LE_FAILURE(success)) {
6371N/A return 0;
6371N/A }
6371N/A
0N/A if (markCoverage < 0) {
0N/A // markGlyph isn't a covered mark glyph
0N/A return 0;
0N/A }
0N/A
0N/A LEPoint markAnchor;
0N/A const MarkArray *markArray = (const MarkArray *) ((char *) this + SWAPW(markArrayOffset));
0N/A le_int32 markClass = markArray->getMarkClass(markGlyph, markCoverage, fontInstance, markAnchor);
0N/A le_uint16 mcCount = SWAPW(classCount);
0N/A
0N/A if (markClass < 0 || markClass >= mcCount) {
0N/A // markGlyph isn't in the mark array or its
0N/A // mark class is too big. The table is mal-formed!
0N/A return 0;
0N/A }
0N/A
0N/A // FIXME: we probably don't want to find a ligature before a previous base glyph...
0N/A GlyphIterator ligatureIterator(*glyphIterator, (le_uint16) (lfIgnoreMarks /*| lfIgnoreBaseGlyphs*/));
0N/A LEGlyphID ligatureGlyph = findLigatureGlyph(&ligatureIterator);
5980N/A le_int32 ligatureCoverage = getBaseCoverage(base, (LEGlyphID) ligatureGlyph, success);
0N/A const LigatureArray *ligatureArray = (const LigatureArray *) ((char *) this + SWAPW(baseArrayOffset));
0N/A le_uint16 ligatureCount = SWAPW(ligatureArray->ligatureCount);
0N/A
0N/A if (ligatureCoverage < 0 || ligatureCoverage >= ligatureCount) {
0N/A // The ligature glyph isn't covered, or the coverage
0N/A // index is too big. The latter means that the
0N/A // table is mal-formed...
0N/A return 0;
0N/A }
0N/A
0N/A le_int32 markPosition = glyphIterator->getCurrStreamPosition();
0N/A Offset ligatureAttachOffset = SWAPW(ligatureArray->ligatureAttachTableOffsetArray[ligatureCoverage]);
0N/A const LigatureAttachTable *ligatureAttachTable = (const LigatureAttachTable *) ((char *) ligatureArray + ligatureAttachOffset);
0N/A le_int32 componentCount = SWAPW(ligatureAttachTable->componentCount);
0N/A le_int32 component = ligatureIterator.getMarkComponent(markPosition);
0N/A
0N/A if (component >= componentCount) {
0N/A // should really just bail at this point...
0N/A component = componentCount - 1;
0N/A }
0N/A
0N/A const ComponentRecord *componentRecord = &ligatureAttachTable->componentRecordArray[component * mcCount];
0N/A Offset anchorTableOffset = SWAPW(componentRecord->ligatureAnchorTableOffsetArray[markClass]);
0N/A const AnchorTable *anchorTable = (const AnchorTable *) ((char *) ligatureAttachTable + anchorTableOffset);
0N/A LEPoint ligatureAnchor, markAdvance, pixels;
0N/A
0N/A anchorTable->getAnchor(ligatureGlyph, fontInstance, ligatureAnchor);
0N/A
0N/A fontInstance->getGlyphAdvance(markGlyph, pixels);
0N/A fontInstance->pixelsToUnits(pixels, markAdvance);
0N/A
0N/A float anchorDiffX = ligatureAnchor.fX - markAnchor.fX;
0N/A float anchorDiffY = ligatureAnchor.fY - markAnchor.fY;
0N/A
0N/A glyphIterator->setCurrGlyphBaseOffset(ligatureIterator.getCurrStreamPosition());
0N/A
0N/A if (glyphIterator->isRightToLeft()) {
0N/A glyphIterator->setCurrGlyphPositionAdjustment(anchorDiffX, anchorDiffY, -markAdvance.fX, -markAdvance.fY);
0N/A } else {
0N/A LEPoint ligatureAdvance;
0N/A
0N/A fontInstance->getGlyphAdvance(ligatureGlyph, pixels);
0N/A fontInstance->pixelsToUnits(pixels, ligatureAdvance);
0N/A
1693N/A glyphIterator->setCurrGlyphPositionAdjustment(anchorDiffX - ligatureAdvance.fX, anchorDiffY - ligatureAdvance.fY, -markAdvance.fX, -markAdvance.fY);
0N/A }
0N/A
0N/A return 1;
0N/A}
1693N/A
1693N/AU_NAMESPACE_END