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// 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 "FilterResizeGaussian.h"
#include "Bitmap.h"
#include "TwoPassScale.h"
#include "../base/Exception.h"
namespace avg {
FilterResizeGaussian::FilterResizeGaussian(const IntPoint& newSize, float radius)
: m_NewSize(newSize),
m_Radius(radius)
{
}
BitmapPtr FilterResizeGaussian::apply(BitmapPtr pBmpSrc)
{
int bpp = pBmpSrc->getBytesPerPixel();
AVG_ASSERT(bpp==4 || bpp==3 || bpp==1);
BitmapPtr pBmpDest = BitmapPtr(new Bitmap(m_NewSize,
pBmpSrc->getPixelFormat(), pBmpSrc->getName()+"_resized"));
GaussianContribDef f(m_Radius);
switch (bpp) {
case 4:
{
TwoPassScale<CDataRGBA_UBYTE> sS(f);
sS.Scale((CDataRGBA_UBYTE::PixelClass *) pBmpSrc->getPixels(),
pBmpSrc->getSize(), pBmpSrc->getStride(),
(CDataRGBA_UBYTE::PixelClass *) pBmpDest->getPixels(),
pBmpDest->getSize(), pBmpDest->getStride());
}
break;
case 3:
{
TwoPassScale <CDataRGB_UBYTE> sS(f);
sS.Scale((CDataRGB_UBYTE::PixelClass *) pBmpSrc->getPixels(),
pBmpSrc->getSize(), pBmpSrc->getStride(),
(CDataRGB_UBYTE::PixelClass *) pBmpDest->getPixels(),
pBmpDest->getSize(), pBmpDest->getStride());
}
break;
case 1:
{
TwoPassScale <CDataA_UBYTE> sS(f);
sS.Scale((CDataA_UBYTE::PixelClass *) pBmpSrc->getPixels(),
pBmpSrc->getSize(), pBmpSrc->getStride(),
(CDataA_UBYTE::PixelClass *) pBmpDest->getPixels(),
pBmpDest->getSize(), pBmpDest->getStride());
}
break;
default:
AVG_ASSERT(false);
}
return pBmpDest;
}
}
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