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//
// 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 "FilterBlur.h"
#include "Filterfill.h"
#include "Pixel8.h"
#include "Bitmap.h"
#include "../base/Exception.h"
#include <iostream>
#include <math.h>
using namespace std;
namespace avg {
FilterBlur::FilterBlur()
{
}
FilterBlur::~FilterBlur()
{
}
BitmapPtr FilterBlur::apply(BitmapPtr pBmpSrc)
{
AVG_ASSERT(pBmpSrc->getPixelFormat() == I8);
IntPoint Size(pBmpSrc->getSize().x-2, pBmpSrc->getSize().y-2);
BitmapPtr pDestBmp = BitmapPtr(new Bitmap(Size, I8, pBmpSrc->getName()));
int srcStride = pBmpSrc->getStride();
int destStride = pDestBmp->getStride();
unsigned char * pSrcLine = pBmpSrc->getPixels()+srcStride+1;
unsigned char * pDestLine = pDestBmp->getPixels();
for (int y = 0; y < Size.y; ++y) {
unsigned char * pSrcPixel = pSrcLine;
unsigned char * pDestPixel = pDestLine;
for (int x = 0; x < Size.x; ++x) {
*pDestPixel = (*(pSrcPixel-1) + *(pSrcPixel)*4 + *(pSrcPixel+1)
+*(pSrcPixel-srcStride)+*(pSrcPixel+srcStride)+4)/8;
++pSrcPixel;
++pDestPixel;
}
pSrcLine += srcStride;
pDestLine += destStride;
}
return pDestBmp;
}
}
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