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/*
* Copyright (c) 2013 Dmitry Kazakov <dimula73@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __KIS_WRAPPED_HLINE_ITERATOR_H
#define __KIS_WRAPPED_HLINE_ITERATOR_H
#include "kis_iterator_ng.h"
#include "kis_wrapped_rect.h"
class WrappedHLineIteratorStrategy
{
public:
typedef KisHLineIteratorSP IteratorTypeSP;
WrappedHLineIteratorStrategy()
: m_iteratorRowStart(KisWrappedRect::TOPLEFT),
m_lastRowCoord(-1)
{
}
inline QSize originalRectToColumnsRows(const QRect &rect) {
return rect.size();
}
inline QPoint columnRowToXY(const QPoint &pt) const {
return pt;
}
inline IteratorTypeSP createIterator(KisDataManager *dataManager,
const QRect &rc,
qint32 offsetX, qint32 offsetY,
bool writable) {
return new KisHLineIterator2(dataManager,
rc.x(), rc.y(),
rc.width(),
offsetX, offsetY,
writable);
}
inline void completeInitialization(QVector<IteratorTypeSP> *iterators,
KisWrappedRect *splitRect) {
m_splitRect = splitRect;
m_iterators = iterators;
m_lastRowCoord = m_splitRect->topLeft().bottom();
}
inline IteratorTypeSP leftColumnIterator() const {
return m_iterators->at(m_iteratorRowStart + KisWrappedRect::TOPLEFT);
}
inline IteratorTypeSP rightColumnIterator() const {
return m_iterators->at(m_iteratorRowStart + KisWrappedRect::TOPRIGHT);
}
inline bool trySwitchIteratorStripe() {
bool needSwitching = leftColumnIterator()->y() == m_lastRowCoord;
if (needSwitching) {
if (m_iteratorRowStart == KisWrappedRect::TOPLEFT &&
m_iterators->at(KisWrappedRect::BOTTOMLEFT)) {
m_iteratorRowStart = KisWrappedRect::BOTTOMLEFT;
m_lastRowCoord = m_splitRect->bottomLeft().bottom();
} else /* if (m_iteratorRowStart == KisWrappedRect::BOTTOMLEFT) */ {
m_iteratorRowStart = KisWrappedRect::TOPLEFT;
m_lastRowCoord = m_splitRect->topLeft().bottom();
foreach (IteratorTypeSP it, *m_iterators) {
if (it) {
it->resetRowPos();
}
}
}
}
return needSwitching;
}
inline void iteratorsToNextRow() {
leftColumnIterator()->nextRow();
if (rightColumnIterator()) {
rightColumnIterator()->nextRow();
}
}
inline bool trySwitchColumnForced() {
leftColumnIterator()->resetPixelPos();
if (rightColumnIterator()) {
rightColumnIterator()->resetPixelPos();
}
return true;
}
private:
KisWrappedRect *m_splitRect;
QVector<IteratorTypeSP> *m_iterators;
int m_iteratorRowStart; // may be either KisWrappedRect::TOPLEFT or KisWrappedRect::BOTTOMLEFT
int m_lastRowCoord;
};
#include "kis_wrapped_line_iterator_base.h"
typedef KisWrappedLineIteratorBase<WrappedHLineIteratorStrategy, KisHLineIteratorNG> KisWrappedHLineIterator;
#endif /* __KIS_WRAPPED_HLINE_ITERATOR_H */
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