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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_LINE_ITERATOR_BASE_H
#define __KIS_WRAPPED_LINE_ITERATOR_BASE_H
template <class IteratorStrategy, class BaseClass>
class KisWrappedLineIteratorBase : public BaseClass
{
public:
KisWrappedLineIteratorBase(KisDataManager *dataManager,
const KisWrappedRect &splitRect,
qint32 offsetX, qint32 offsetY,
bool writable)
: m_splitRect(splitRect)
{
Q_ASSERT(m_splitRect.isSplit());
m_iterators.resize(4);
for (int i = 0; i < 4; i++) {
QRect rc = m_splitRect[i];
if (rc.isEmpty()) continue;
m_iterators[i] = m_strategy.createIterator(dataManager,
rc,
offsetX, offsetY,
writable);
}
m_strategy.completeInitialization(&m_iterators, &m_splitRect);
m_iterationAreaSize =
m_strategy.originalRectToColumnsRows(m_splitRect.originalRect());
m_currentIterator = m_strategy.leftColumnIterator();
}
bool nextPixel() {
int result = m_currentIterator->nextPixel();
if (!result) {
result = trySwitchColumn();
}
m_currentPos.rx()++;
return m_currentPos.rx() < m_iterationAreaSize.width();
}
bool nextPixels(qint32 n) {
int result = m_currentIterator->nextPixels(n);
if (!result) {
result = trySwitchColumn();
}
m_currentPos.rx() += n;
return m_currentPos.rx() < m_iterationAreaSize.width();
}
void nextRow() {
if (!m_strategy.trySwitchIteratorStripe()) {
m_strategy.iteratorsToNextRow();
}
m_currentIterator = m_strategy.leftColumnIterator();
m_currentPos.rx() = 0;
m_currentPos.ry()++;
}
void nextColumn() {
nextRow();
}
const quint8* oldRawData() const {
return m_currentIterator->oldRawData();
}
const quint8* rawDataConst() const {
return m_currentIterator->rawDataConst();
}
quint8* rawData() {
return m_currentIterator->rawData();
}
qint32 nConseqPixels() const {
qint32 iteratorChunk =
m_currentIterator->nConseqPixels();
return qMin(iteratorChunk,
m_iterationAreaSize.width() - m_currentPos.x());
}
qint32 x() const {
return (m_splitRect.originalRect().topLeft() +
m_strategy.columnRowToXY(m_currentPos)).x();
}
qint32 y() const {
return (m_splitRect.originalRect().topLeft() +
m_strategy.columnRowToXY(m_currentPos)).y();
}
void resetPixelPos() {
qCritical() << "CRITICAL: resetPixelPos() is not implemented";
}
void resetRowPos() {
qCritical() << "CRITICAL: resetRowPos() is not implemented";
}
void resetColumnPos() {
resetRowPos();
}
private:
bool trySwitchColumn() {
int result = true;
if (m_currentIterator == m_strategy.leftColumnIterator() &&
m_strategy.rightColumnIterator()) {
m_currentIterator = m_strategy.rightColumnIterator();
} else if (m_strategy.trySwitchColumnForced()) {
m_currentIterator = m_strategy.leftColumnIterator();
} else {
result = false;
}
return result;
}
private:
KisWrappedRect m_splitRect;
QSize m_iterationAreaSize; // columns x rows
QPoint m_currentPos; // column, row
QVector<typename IteratorStrategy::IteratorTypeSP> m_iterators;
typename IteratorStrategy::IteratorTypeSP m_currentIterator;
IteratorStrategy m_strategy;
};
#endif /* __KIS_WRAPPED_LINE_ITERATOR_BASE_H */
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