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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 "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);
}
}
}
}
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