1 files changed, 152 insertions, 0 deletions
diff --git a/krita/core/tiles/kis_tile.cc b/krita/core/tiles/kis_tile.cc
new file mode 100644
index 00000000..49d20cf6
--- /dev/null
+++ b/krita/core/tiles/kis_tile.cc
@@ -0,0 +1,152 @@
+/*
+ *  Copyright (c) 2002 Patrick Julien <freak@codepimps.org>
+ *
+ *  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 <assert.h>
+#include <kdebug.h>
+
+#include "kis_tile_global.h"
+#include "kis_tile.h"
+#include "kis_tileddatamanager.h"
+#include "kis_tilemanager.h"
+
+const Q_INT32 KisTile::WIDTH = 64;
+const Q_INT32 KisTile::HEIGHT = 64;
+
+
+KisTile::KisTile(Q_INT32 pixelSize, Q_INT32 col, Q_INT32 row, const Q_UINT8 *defPixel)
+{
+    m_pixelSize = pixelSize;
+    m_data = 0;
+    m_nextTile = 0;
+    m_col = col;
+    m_row = row;
+    m_nReadlock = 0;
+
+    allocate();
+
+    KisTileManager::instance()->registerTile(this);
+
+    setData(defPixel);
+}
+
+KisTile::KisTile(const KisTile& rhs, Q_INT32 col, Q_INT32 row)
+{
+    if (this != &rhs) {
+        m_pixelSize = rhs.m_pixelSize;
+        m_data = 0;
+        m_nextTile = 0;
+        m_nReadlock = 0;
+
+        allocate();
+
+        // Assure we have data to copy
+        rhs.addReader();
+        memcpy(m_data, rhs.m_data, WIDTH * HEIGHT * m_pixelSize * sizeof(Q_UINT8));
+        rhs.removeReader();
+
+        m_col = col;
+        m_row = row;
+
+        KisTileManager::instance()->registerTile(this);
+    }
+}
+
+KisTile::KisTile(const KisTile& rhs)
+{
+    if (this != &rhs) {
+        m_pixelSize = rhs.m_pixelSize;
+        m_col = rhs.m_col;
+        m_row = rhs.m_row;
+        m_data = 0;
+        m_nextTile = 0;
+        m_nReadlock = 0;
+
+        allocate();
+
+        rhs.addReader();
+        memcpy(m_data, rhs.m_data, WIDTH * HEIGHT * m_pixelSize * sizeof(Q_UINT8));
+        rhs.removeReader();
+
+        KisTileManager::instance()->registerTile(this);
+    }
+}
+
+KisTile::~KisTile()
+{
+    KisTileManager::instance()->deregisterTile(this); // goes before the deleting of m_data!
+
+    if (m_data) {
+//        delete[] m_data;
+        KisTileManager::instance()->dontNeedTileData(m_data, m_pixelSize);
+        m_data = 0;
+    }
+    assert( !readers() );
+}
+
+void KisTile::allocate()
+{
+    if (m_data == 0) {
+        assert (!readers());
+        m_data = KisTileManager::instance()->requestTileData(m_pixelSize);
+        Q_CHECK_PTR(m_data);
+    }
+}
+
+void KisTile::setNext(KisTile *n)
+{
+    m_nextTile = n;
+}
+
+Q_UINT8 *KisTile::data(Q_INT32 x, Q_INT32 y ) const
+{
+    addReader();
+    removeReader();
+
+    Q_ASSERT(m_data != 0);
+    if (m_data == 0) return 0;
+
+    return m_data + m_pixelSize * ( y * WIDTH + x );
+}
+
+void KisTile::setData(const Q_UINT8 *pixel)
+{
+    addReader();
+    Q_UINT8 *dst = m_data;
+    for(int i=0; i <WIDTH * HEIGHT;i++)
+    {
+        memcpy(dst, pixel, m_pixelSize);
+        dst+=m_pixelSize;
+    }
+    removeReader();
+}
+
+void KisTile::addReader() const
+{
+    if (m_nReadlock++ == 0)
+        KisTileManager::instance()->ensureTileLoaded(this);
+    else if (m_nReadlock < 0) {
+        kdDebug(41000) << m_nReadlock << endl;
+        assert(0);
+    }
+    assert(m_data);
+}
+
+void KisTile::removeReader() const
+{
+    if (--m_nReadlock == 0)
+        KisTileManager::instance()->maySwapTile(this);
+}