1 files changed, 61 insertions, 0 deletions
diff --git a/src/graphics/FilterThreshold.cpp b/src/graphics/FilterThreshold.cpp
new file mode 100644
index 0000000..a6fddde
--- /dev/null
+++ b/src/graphics/FilterThreshold.cpp
@@ -0,0 +1,61 @@
+//
+//  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 "FilterThreshold.h"
+#include "Pixeldefs.h"
+
+#include "../base/Exception.h"
+
+#include <stdio.h>
+
+namespace avg {
+   
+using namespace std;
+
+FilterThreshold::FilterThreshold(int threshold)
+    : Filter(),
+      m_Threshold(threshold)
+{
+}
+
+FilterThreshold::~FilterThreshold()
+{
+
+}
+
+void FilterThreshold::applyInPlace(BitmapPtr pBmp) 
+{
+    IntPoint size = pBmp->getSize();
+    AVG_ASSERT(pBmp->getPixelFormat() == I8);
+    for (int y = 0; y < size.y; y++) {
+        unsigned char * pLine = pBmp->getPixels()+y*pBmp->getStride();
+        for (int x = 0; x < size.x; x++) { 
+            unsigned char * pPixel = pLine + x;
+            if (*pPixel >= m_Threshold) {
+                *pPixel = 255;
+            } else {
+                *pPixel = 0;
+            }
+        }
+    }
+}
+
+}