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diff --git a/src/imageplugins/superimpose/superimpose.cpp b/src/imageplugins/superimpose/superimpose.cpp
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+++ b/src/imageplugins/superimpose/superimpose.cpp
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2006-18-03
+ * Description : Superimpose filter.
+ *
+ * Copyright (C) 2006-2008 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
+ *
+ * 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, 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.
+ *
+ * ============================================================ */
+
+// Local includes.
+
+#include "superimpose.h"
+
+namespace DigikamSuperImposeImagesPlugin
+{
+
+SuperImpose::SuperImpose(Digikam::DImg *orgImage, Digikam::DImg *templ,
+                         TQRect orgImageSelection,
+                         Digikam::DColorComposer::CompositingOperation compositeRule)
+{
+    m_orgImage      = *orgImage;
+    m_template      = *templ;
+    m_selection     = orgImageSelection;
+    m_compositeRule = compositeRule;
+
+    filterImage();
+}
+
+void SuperImpose::filterImage(void)
+{
+    if (m_template.isNull())
+        return;
+
+    int templateWidth  = m_template.width();
+    int templateHeight = m_template.height();
+
+    // take selection of src image and scale it to size of template
+    m_destImage = m_orgImage.smoothScaleSection(m_selection.x(), m_selection.y(),
+                m_selection.width(), m_selection.height(), templateWidth, templateHeight);
+
+    // convert depth if necessary
+    m_template.convertToDepthOfImage(&m_destImage);
+
+    // get composer for compositing rule
+    Digikam::DColorComposer *composer = Digikam::DColorComposer::getComposer(m_compositeRule);
+    Digikam::DColorComposer::MultiplicationFlags flags = Digikam::DColorComposer::NoMultiplication;
+    if (m_compositeRule != Digikam::DColorComposer::PorterDuffNone)
+        flags = Digikam::DColorComposer::MultiplicationFlagsDImg;
+
+    // do alpha blending of template on dest image
+    m_destImage.bitBlendImage(composer, &m_template, 0, 0, templateWidth, templateHeight, 0, 0, flags);
+
+    delete composer;
+}
+
+} // namespace DigikamSuperImposeImagesPlugin