1 files changed, 67 insertions, 0 deletions
diff --git a/src/imaging/FilterClearBorder.cpp b/src/imaging/FilterClearBorder.cpp
new file mode 100644
index 0000000..dba7c8b
--- /dev/null
+++ b/src/imaging/FilterClearBorder.cpp
@@ -0,0 +1,67 @@
+//
+//  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 "FilterClearBorder.h"
+
+#include "../base/Exception.h"
+
+#include <iostream>
+#include <math.h>
+#include <string.h>
+
+using namespace std;
+
+namespace avg {
+
+FilterClearBorder::FilterClearBorder(int numPixels)
+    : m_NumPixels(numPixels)
+{
+}
+
+FilterClearBorder::~FilterClearBorder()
+{
+}
+
+void FilterClearBorder::applyInPlace(BitmapPtr pBmp)
+{
+    AVG_ASSERT(pBmp->getPixelFormat() == I8);
+    AVG_ASSERT(m_NumPixels < pBmp->getSize().x);
+    AVG_ASSERT(m_NumPixels < pBmp->getSize().y);
+    if (m_NumPixels != 0) {
+        int stride = pBmp->getStride();
+        unsigned char * pPixels = pBmp->getPixels();
+        IntPoint size = pBmp->getSize();
+        IntPoint activeSize = pBmp->getSize()-IntPoint(2*m_NumPixels, 2*m_NumPixels);
+        for (int y=m_NumPixels-1; y >= 0; --y) {
+            memset(pPixels+stride*y+m_NumPixels, 0, activeSize.x);
+        }
+        for (int y=size.y-m_NumPixels; y < size.y; ++y) {
+            memset(pPixels+stride*y+m_NumPixels, 0, activeSize.x);
+        }
+
+        for (int y = 0; y < size.y; ++y) {
+            memset(pPixels+stride*y, 0, m_NumPixels);
+            memset(pPixels+stride*y+size.x-m_NumPixels, 0, m_NumPixels);
+        }
+    }
+}
+
+}