1 files changed, 127 insertions, 0 deletions
diff --git a/src/imageplugins/coreplugin/sharpnesseditor/unsharp.cpp b/src/imageplugins/coreplugin/sharpnesseditor/unsharp.cpp
new file mode 100644
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+++ b/src/imageplugins/coreplugin/sharpnesseditor/unsharp.cpp
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2005-05-25
+ * Description : Unsharp Mask threaded image filter.
+ *
+ * Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
+ *
+ * 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.
+ * 
+ * ============================================================ */
+
+// C++ includes.
+
+#include <cmath>
+#include <cstdlib>
+
+// Local includes.
+
+#include "ddebug.h"
+#include "dimg.h"
+#include "dcolor.h"
+#include "dimgimagefilters.h"
+#include "dimggaussianblur.h"
+#include "unsharp.h"
+
+namespace DigikamImagesPluginCore
+{
+
+UnsharpMask::UnsharpMask(Digikam::DImg *orgImage, TQObject *parent, int radius, 
+                         double amount, double threshold)
+           : DImgThreadedFilter(orgImage, parent, "UnsharpMask")
+{ 
+    m_radius    = radius;
+    m_amount    = amount;
+    m_threshold = threshold;
+    initFilter();
+}
+
+void UnsharpMask::filterImage(void)
+{
+    int    progress;
+    int    quantum;
+    double quantumThreshold;
+    double value;
+    Digikam::DColor p; 
+    Digikam::DColor q;
+
+    if (m_orgImage.isNull())
+    {
+       DWarning() << k_funcinfo << "No image data available!" << endl;
+       return;
+    }
+
+    Digikam::DImgGaussianBlur(this, m_orgImage, m_destImage, 0, 10, (int)(m_radius));
+
+    quantum          = m_destImage.sixteenBit() ? 65535 : 255;
+    quantumThreshold = quantum*m_threshold;
+
+    for (uint y = 0 ; !m_cancel && (y < m_destImage.height()) ; y++)
+    {
+        for (uint x = 0 ; !m_cancel && (x < m_destImage.width()) ; x++)
+        {
+            p = m_orgImage.getPixelColor(x, y);
+            q = m_destImage.getPixelColor(x, y);
+
+            // Red channel.
+            value = (double)(p.red())-(double)(q.red());
+    
+            if (fabs(2.0*value) < quantumThreshold)
+                value = (double)(p.red());
+            else
+                value = (double)(p.red()) + value*m_amount;
+
+            q.setRed(CLAMP(ROUND(value), 0, quantum));
+    
+            // Green Channel.
+            value = (double)(p.green())-(double)(q.green());
+    
+            if (fabs(2.0*value) < quantumThreshold)
+                value = (double)(p.green());
+            else
+                value = (double)(p.green()) + value*m_amount;
+
+            q.setGreen(CLAMP(ROUND(value), 0, quantum));
+            
+            // Blue Channel.
+            value = (double)(p.blue())-(double)(q.blue());
+    
+            if (fabs(2.0*value) < quantumThreshold)
+                value = (double)(p.blue());
+            else
+                value = (double)(p.blue()) + value*m_amount;
+
+            q.setBlue(CLAMP(ROUND(value), 0, quantum));
+        
+            // Alpha Channel.
+            value = (double)(p.alpha())-(double)(q.alpha());
+    
+            if (fabs(2.0*value) < quantumThreshold)
+                value = (double)(p.alpha());
+            else
+                value = (double)(p.alpha()) + value*m_amount;
+
+            q.setAlpha(CLAMP(ROUND(value), 0, quantum));
+
+            m_destImage.setPixelColor(x, y, q);        
+        }
+
+        progress = (int)(10.0 + ((double)y * 90.0) / m_destImage.height());
+        if ( progress%5 == 0 )
+           postProgress( progress );   
+    }
+}
+
+}  // NameSpace DigikamImagesPluginCore