File indexing completed on 2024-05-12 15:58:48 

0001 /*
0002  *  SPDX-FileCopyrightText: 2013 Dmitry Kazakov <dimula73@gmail.com>
0003  *
0004  *  SPDX-License-Identifier: GPL-2.0-or-later
0005  */
0006 
0007 #ifndef __KIS_WRAPPED_HLINE_ITERATOR_H
0008 #define __KIS_WRAPPED_HLINE_ITERATOR_H
0009 
0010 #include "kis_iterator_ng.h"
0011 #include "kis_wrapped_rect.h"
0012 
0013 
0014 class WrappedHLineIteratorStrategy
0015 {
0016 public:
0017     typedef KisHLineIteratorSP IteratorTypeSP;
0018 
0019     WrappedHLineIteratorStrategy()
0020         : m_iteratorRowStart(KisWrappedRect::TOPLEFT),
0021           m_lastRowCoord(-1)
0022     {
0023     }
0024 
0025     inline QSize originalRectToColumnsRows(const QRect &rect) {
0026         return rect.size();
0027     }
0028 
0029     inline QPoint columnRowToXY(const QPoint &pt) const {
0030         return pt;
0031     }
0032 
0033     inline IteratorTypeSP createIterator(KisDataManager *dataManager,
0034                                          const QRect &rc,
0035                                          qint32 offsetX, qint32 offsetY,
0036                                          bool writable,
0037                                          KisIteratorCompleteListener *listener) {
0038 
0039         return new KisHLineIterator2(dataManager,
0040                                      rc.x(), rc.y(),
0041                                      rc.width(),
0042                                      offsetX, offsetY,
0043                                      writable,
0044                                      listener);
0045     }
0046 
0047     inline void completeInitialization(QVector<IteratorTypeSP> *iterators,
0048                                        KisWrappedRect *splitRect) {
0049         m_splitRect = splitRect;
0050         m_iterators = iterators;
0051 
0052         m_lastRowCoord = m_splitRect->topLeft().bottom();
0053     }
0054 
0055     inline IteratorTypeSP leftColumnIterator() const {
0056         return m_iterators->at(m_iteratorRowStart + KisWrappedRect::TOPLEFT);
0057     }
0058 
0059     inline IteratorTypeSP rightColumnIterator() const {
0060         return m_iterators->at(m_iteratorRowStart + KisWrappedRect::TOPRIGHT);
0061     }
0062 
0063     inline bool trySwitchIteratorStripe() {
0064         bool needSwitching = leftColumnIterator()->y() == m_lastRowCoord;
0065 
0066         if (needSwitching) {
0067             if (m_iteratorRowStart == KisWrappedRect::TOPLEFT &&
0068                 m_iterators->at(KisWrappedRect::BOTTOMLEFT)) {
0069 
0070                 m_iteratorRowStart = KisWrappedRect::BOTTOMLEFT;
0071                 m_lastRowCoord = m_splitRect->bottomLeft().bottom();
0072             } else /* if (m_iteratorRowStart == KisWrappedRect::BOTTOMLEFT) */ {
0073                 m_iteratorRowStart = KisWrappedRect::TOPLEFT;
0074                 m_lastRowCoord = m_splitRect->topLeft().bottom();
0075 
0076                 Q_FOREACH (IteratorTypeSP it, *m_iterators) {
0077                     if (it) {
0078                         it->resetRowPos();
0079                     }
0080                 }
0081             }
0082         }
0083 
0084         return needSwitching;
0085     }
0086 
0087     inline void iteratorsToNextRow() {
0088         leftColumnIterator()->nextRow();
0089         if (rightColumnIterator()) {
0090             rightColumnIterator()->nextRow();
0091         }
0092     }
0093 
0094     inline bool trySwitchColumnForced() {
0095         leftColumnIterator()->resetPixelPos();
0096         if (rightColumnIterator()) {
0097             rightColumnIterator()->resetPixelPos();
0098         }
0099         return true;
0100     }
0101 
0102 private:
0103     KisWrappedRect *m_splitRect;
0104     QVector<IteratorTypeSP> *m_iterators;
0105     int m_iteratorRowStart; // may be either KisWrappedRect::TOPLEFT or KisWrappedRect::BOTTOMLEFT
0106     int m_lastRowCoord;
0107 };
0108 
0109 #include "kis_wrapped_line_iterator_base.h"
0110 typedef KisWrappedLineIteratorBase<WrappedHLineIteratorStrategy, KisHLineIteratorNG> KisWrappedHLineIterator;
0111 
0112 
0113 #endif /* __KIS_WRAPPED_HLINE_ITERATOR_H */