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/*
* This file is part of the Chalk
*
* Copyright (c) 2004 Casper Boemann <cbr@boemann.dk>
*
* 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.
*/
#include <kdebug.h>
#include "kis_tile_global.h"
#include "kis_tilediterator.h"
KisTiledIterator::KisTiledIterator( KisTiledDataManager *ndevice)
{
Q_ASSERT(ndevice != 0);
m_ktm = ndevice;
m_x = 0;
m_y = 0;
m_row = 0;
m_col = 0;
m_pixelSize = m_ktm->pixelSize();
m_tile = 0;
m_oldTile = 0;
}
KisTiledIterator::~KisTiledIterator( )
{
if (m_tile)
m_tile->removeReader();
if (m_oldTile)
m_oldTile->removeReader();
}
KisTiledIterator::KisTiledIterator(const KisTiledIterator& rhs)
: KShared()
{
if (this != &rhs) {
m_ktm = rhs.m_ktm;
m_pixelSize = rhs.m_pixelSize;
m_x = rhs.m_x;
m_y = rhs.m_y;
m_row = rhs.m_row;
m_col = rhs.m_col;
m_data = rhs.m_data;
m_oldData = rhs.m_oldData;
m_offset = rhs.m_offset;
m_tile = rhs.m_tile;
m_oldTile = rhs.m_oldTile;
m_writable = rhs.m_writable;
if (m_tile)
m_tile->addReader();
}
}
KisTiledIterator& KisTiledIterator::operator=(const KisTiledIterator& rhs)
{
if (this != &rhs) {
if (m_tile)
m_tile->removeReader();
if (m_oldTile)
m_oldTile->removeReader();
m_ktm = rhs.m_ktm;
m_pixelSize = rhs.m_pixelSize;
m_x = rhs.m_x;
m_y = rhs.m_y;
m_row = rhs.m_row;
m_col = rhs.m_col;
m_data = rhs.m_data;
m_oldData = rhs.m_oldData;
m_offset = rhs.m_offset;
m_tile = rhs.m_tile;
m_oldTile = rhs.m_oldTile;
m_writable = rhs.m_writable;
if (m_tile)
m_tile->addReader();
}
return *this;
}
TQ_UINT8 * KisTiledIterator::rawData() const
{
return m_data + m_offset;
}
const TQ_UINT8 * KisTiledIterator::oldRawData() const
{
#ifdef DEBUG
// Warn if we're misusing oldRawData(). If there's no memento, oldRawData is the same
// as rawData().
kdWarning(!m_ktm->hasCurrentMemento(), DBG_AREA_TILES) << "Accessing oldRawData() when no transaction is in progress.\n";
#endif
return m_oldData + m_offset;
}
void KisTiledIterator::fetchTileData(TQ_INT32 col, TQ_INT32 row)
{
if (m_tile)
m_tile->removeReader();
if (m_oldTile)
m_oldTile->removeReader();
m_oldTile = 0;
m_tile = m_ktm->getTile(col, row, m_writable);
if (m_tile == 0) return;
//Q_ASSERT(m_tile != 0);
m_tile->addReader();
m_data = m_tile->data();
if (m_data == 0) return;
//Q_ASSERT(m_data != 0);
// set old data but default to current value
m_oldTile = m_ktm->getOldTile(col, row, m_tile);
m_oldTile->addReader(); // Double locking in case m_oldTile==m_tile is no problem
m_oldData = m_oldTile->data();
}
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