diff options
Diffstat (limited to 'src/graphics/FilterResizeBilinear.cpp')
-rw-r--r-- | src/graphics/FilterResizeBilinear.cpp | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/graphics/FilterResizeBilinear.cpp b/src/graphics/FilterResizeBilinear.cpp new file mode 100644 index 0000000..750e07a --- /dev/null +++ b/src/graphics/FilterResizeBilinear.cpp @@ -0,0 +1,77 @@ +// 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 "FilterResizeBilinear.h" +#include "Bitmap.h" +#include "TwoPassScale.h" + +#include "../base/Exception.h" + +namespace avg { + +FilterResizeBilinear::FilterResizeBilinear(const IntPoint& newSize) + : m_NewSize(newSize) +{ +} + +BitmapPtr FilterResizeBilinear::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")); + + BilinearContribDef f(0.64); + 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; +} + +} + |