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_VLINE_ITERATOR_H
0008 #define __KIS_WRAPPED_VLINE_ITERATOR_H
0009 
0010 #include "kis_iterator_ng.h"
0011 #include "kis_wrapped_rect.h"
0012 
0013 class WrappedVLineIteratorStrategy
0014 {
0015 private:
0016     static const int TOP_OFFSET = 0;
0017     static const int BOTTOM_OFFSET = 2;
0018 
0019 public:
0020     typedef KisVLineIteratorSP IteratorTypeSP;
0021 
0022     WrappedVLineIteratorStrategy()
0023         : m_iteratorColumnStart(KisWrappedRect::TOPLEFT),
0024           m_lastColumnCoord(-1)
0025     {
0026     }
0027 
0028     inline QSize originalRectToColumnsRows(const QRect &rect) {
0029         return QSize(rect.height(), rect.width());
0030     }
0031 
0032     inline QPoint columnRowToXY(const QPoint &pt) const {
0033         return QPoint(pt.y(), pt.x());
0034     }
0035 
0036     inline IteratorTypeSP createIterator(KisDataManager *dataManager,
0037                                          const QRect &rc,
0038                                          qint32 offsetX, qint32 offsetY,
0039                                          bool writable,
0040                                          KisIteratorCompleteListener *completeListener) {
0041 
0042         return new KisVLineIterator2(dataManager,
0043                                      rc.x(), rc.y(),
0044                                      rc.height(),
0045                                      offsetX, offsetY,
0046                                      writable,
0047                                      completeListener);
0048     }
0049 
0050     inline void completeInitialization(QVector<IteratorTypeSP> *iterators,
0051                                        KisWrappedRect *splitRect) {
0052         m_splitRect = splitRect;
0053         m_iterators = iterators;
0054 
0055         m_lastColumnCoord = m_splitRect->topLeft().right();
0056     }
0057 
0058     inline IteratorTypeSP leftColumnIterator() const {
0059         return m_iterators->at(m_iteratorColumnStart + TOP_OFFSET);
0060     }
0061 
0062     inline IteratorTypeSP rightColumnIterator() const {
0063         return m_iterators->at(m_iteratorColumnStart + BOTTOM_OFFSET);
0064     }
0065 
0066     inline bool trySwitchIteratorStripe() {
0067         bool needSwitching = leftColumnIterator()->x() == m_lastColumnCoord;
0068 
0069             if (needSwitching) {
0070                 if (m_iteratorColumnStart == KisWrappedRect::TOPLEFT &&
0071                     m_iterators->at(KisWrappedRect::TOPRIGHT)) {
0072 
0073                     m_iteratorColumnStart = KisWrappedRect::TOPRIGHT;
0074                     m_lastColumnCoord = m_splitRect->topRight().right();
0075                 } else /* if (m_iteratorColumnStart == KisWrappedRect::TOPRIGHT) */ {
0076                     m_iteratorColumnStart = KisWrappedRect::TOPLEFT;
0077                     m_lastColumnCoord = m_splitRect->topLeft().right();
0078 
0079                     Q_FOREACH (IteratorTypeSP it, *m_iterators) {
0080                         if (it) {
0081                             it->resetColumnPos();
0082                         }
0083                     }
0084                 }
0085             }
0086 
0087             return needSwitching;
0088     }
0089 
0090     inline void iteratorsToNextRow() {
0091         leftColumnIterator()->nextColumn();
0092         if (rightColumnIterator()) {
0093             rightColumnIterator()->nextColumn();
0094         }
0095     }
0096 
0097     inline bool trySwitchColumnForced() {
0098         leftColumnIterator()->resetPixelPos();
0099         if (rightColumnIterator()) {
0100             rightColumnIterator()->resetPixelPos();
0101         }
0102 
0103         return true;
0104     }
0105 
0106 private:
0107     KisWrappedRect *m_splitRect;
0108     QVector<IteratorTypeSP> *m_iterators;
0109     int m_iteratorColumnStart; // may be either KisWrappedRect::TOPLEFT or KisWrappedRect::TOPRIGHT
0110     int m_lastColumnCoord;
0111 };
0112 
0113 #include "kis_wrapped_line_iterator_base.h"
0114 typedef KisWrappedLineIteratorBase<WrappedVLineIteratorStrategy, KisVLineIteratorNG> KisWrappedVLineIterator;
0115 
0116 
0117 #endif /* __KIS_WRAPPED_VLINE_ITERATOR_H */