1 files changed, 71 insertions, 0 deletions
diff --git a/src/graphics/FilterDilation.cpp b/src/graphics/FilterDilation.cpp
new file mode 100644
index 0000000..11adaa2
--- /dev/null
+++ b/src/graphics/FilterDilation.cpp
@@ -0,0 +1,71 @@
+//
+//  libavg - Media Playback Engine. 
+//  Copyright (C) 2003-2014 Ulrich von Zadow
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2 of the License, or (at your option) any later version.
+//
+//  This library 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
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+//  Current versions can be found at www.libavg.de
+//
+
+#include "FilterDilation.h"
+
+#include "../base/Exception.h"
+
+#include <algorithm>
+
+using namespace std;
+
+namespace avg {
+    
+FilterDilation::FilterDilation()
+  : Filter()
+{
+}
+
+FilterDilation::~FilterDilation()
+{
+
+}
+
+BitmapPtr FilterDilation::apply(BitmapPtr pSrcBmp) 
+{
+    AVG_ASSERT(pSrcBmp->getPixelFormat() == I8);
+    IntPoint size = pSrcBmp->getSize();
+    BitmapPtr pDestBmp = BitmapPtr(new Bitmap(size, I8, pSrcBmp->getName()));
+    unsigned char * pSrcLine = pSrcBmp->getPixels();
+    unsigned char * pNextSrcLine;
+    unsigned char * pDestLine = pDestBmp->getPixels();
+    for (int y = 0; y < size.y; y++) {
+        pDestLine = pDestBmp->getPixels()+y*pDestBmp->getStride();
+        unsigned char * pLastSrcLine = pSrcLine;
+        pSrcLine = pSrcBmp->getPixels()+y*pSrcBmp->getStride();
+        if (y < size.y-1) {
+            pNextSrcLine = pSrcBmp->getPixels()+(y+1)*pSrcBmp->getStride();
+        } else {
+            pNextSrcLine = pSrcBmp->getPixels()+y*pSrcBmp->getStride();
+        }
+        pDestLine[0] = max(pSrcLine[0], max(pSrcLine[1], 
+                max(pLastSrcLine[0], pNextSrcLine[0])));
+        for (int x = 1; x < size.x-1; x++) { 
+            pDestLine[x] = max(pSrcLine[x], max(pSrcLine[x-1], max(pSrcLine[x+1], 
+                    max(pLastSrcLine[x], pNextSrcLine[x]))));
+        }
+        pDestLine[size.x-1] = max(pSrcLine[size.x-2], max(pSrcLine[size.x-1], 
+                max(pLastSrcLine[size.x-1], pNextSrcLine[size.x-1])));
+    }
+    return pDestBmp;
+}
+
+} // namespace