1 files changed, 131 insertions, 0 deletions
diff --git a/chalk/core/tiles/kis_tilediterator.cpp b/chalk/core/tiles/kis_tilediterator.cpp
new file mode 100644
index 000000000..0f3bdf001
--- /dev/null
+++ b/chalk/core/tiles/kis_tilediterator.cpp
@@ -0,0 +1,131 @@
+/*
+ * 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)
+    : TDEShared()
+{
+    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();
+}