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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/*
*
* (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "LEFontInstance.h"
#include "OpenTypeTables.h"
#include "AnchorTables.h"
#include "MarkArrays.h"
#include "GlyphPositioningTables.h"
#include "AttachmentPosnSubtables.h"
#include "MarkToMarkPosnSubtables.h"
#include "GlyphIterator.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
LEGlyphID MarkToMarkPositioningSubtable::findMark2Glyph(GlyphIterator *glyphIterator) const
{
if (glyphIterator->findMark2Glyph()) {
return glyphIterator->getCurrGlyphID();
}
return 0xFFFF;
}
le_int32 MarkToMarkPositioningSubtable::process(const LETableReference &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
{
if (LE_FAILURE(success)) {
return 0;
}
LEGlyphID markGlyph = glyphIterator->getCurrGlyphID();
le_int32 markCoverage = getGlyphCoverage(base, (LEGlyphID) markGlyph, success);
if (LE_FAILURE(success)) {
return 0;
}
if (markCoverage < 0) {
// markGlyph isn't a covered mark glyph
return 0;
}
LEPoint markAnchor;
LEReferenceTo<MarkArray> markArray(base, success, SWAPW(markArrayOffset));
if(LE_FAILURE(success)) {
return 0;
}
le_int32 markClass = markArray->getMarkClass(markArray, markGlyph, markCoverage, fontInstance, markAnchor, success);
le_uint16 mcCount = SWAPW(classCount);
if (markClass < 0 || markClass >= mcCount) {
// markGlyph isn't in the mark array or its
// mark class is too big. The table is mal-formed!
return 0;
}
GlyphIterator mark2Iterator(*glyphIterator);
LEGlyphID mark2Glyph = findMark2Glyph(&mark2Iterator);
if (mark2Glyph == 0xFFFF) {
return 0;
}
le_int32 mark2Coverage = getBaseCoverage(base, (LEGlyphID) mark2Glyph, success);
LEReferenceTo<Mark2Array> mark2Array(base, success, (const Mark2Array *) ((char *) this + SWAPW(baseArrayOffset)));
if(LE_FAILURE(success)) return 0;
le_uint16 mark2Count = SWAPW(mark2Array->mark2RecordCount);
if (mark2Coverage < 0 || mark2Coverage >= mark2Count) {
// The mark2 glyph isn't covered, or the coverage
// index is too big. The latter means that the
// table is mal-formed...
return 0;
}
LEReferenceTo<Mark2Record> mark2Record(base, success, &mark2Array->mark2RecordArray[mark2Coverage * mcCount]);
if(LE_FAILURE(success)) return 0;
Offset anchorTableOffset = SWAPW(mark2Record->mark2AnchorTableOffsetArray[markClass]);
LEReferenceTo<AnchorTable> anchorTable(mark2Array, success, anchorTableOffset);
if(LE_FAILURE(success)) return 0;
LEPoint mark2Anchor, markAdvance, pixels;
if (anchorTableOffset == 0) {
// this seems to mean that the marks don't attach...
return 0;
}
anchorTable->getAnchor(anchorTable, mark2Glyph, fontInstance, mark2Anchor, success);
fontInstance->getGlyphAdvance(markGlyph, pixels);
fontInstance->pixelsToUnits(pixels, markAdvance);
float anchorDiffX = mark2Anchor.fX - markAnchor.fX;
float anchorDiffY = mark2Anchor.fY - markAnchor.fY;
_LETRACE("Offset: (%.2f, %.2f) glyph 0x%X mark2 0x%X", anchorDiffX, anchorDiffY, markGlyph, mark2Glyph);
glyphIterator->setCurrGlyphBaseOffset(mark2Iterator.getCurrStreamPosition());
if (glyphIterator->isRightToLeft()) {
glyphIterator->setCurrGlyphPositionAdjustment(anchorDiffX, anchorDiffY, -markAdvance.fX, -markAdvance.fY);
} else {
LEPoint mark2Advance;
fontInstance->getGlyphAdvance(mark2Glyph, pixels);
fontInstance->pixelsToUnits(pixels, mark2Advance);
glyphIterator->setCurrGlyphPositionAdjustment(anchorDiffX - mark2Advance.fX, anchorDiffY - mark2Advance.fY, -markAdvance.fX, -markAdvance.fY);
}
return 1;
}
U_NAMESPACE_END
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