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Diffstat (limited to 'src/graphics/FilterMask.cpp')
-rw-r--r-- | src/graphics/FilterMask.cpp | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/graphics/FilterMask.cpp b/src/graphics/FilterMask.cpp new file mode 100644 index 0000000..d5fa6d0 --- /dev/null +++ b/src/graphics/FilterMask.cpp @@ -0,0 +1,84 @@ +// +// 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 "FilterMask.h" +#include "Pixeldefs.h" + +#include "../base/Exception.h" + +#include <stdio.h> + +namespace avg { + +using namespace std; + +FilterMask::FilterMask(BitmapPtr pMaskBmp) + : Filter(), + m_pMaskBmp(pMaskBmp) +{ + AVG_ASSERT(m_pMaskBmp->getPixelFormat() == I8); +} + +FilterMask::~FilterMask() +{ + +} + +void FilterMask::applyInPlace(BitmapPtr pBmp) +{ + IntPoint size = pBmp->getSize(); + AVG_ASSERT(size == m_pMaskBmp->getSize()); + for (int y = 0; y < size.y; y++) { + unsigned char * pMaskLine = m_pMaskBmp->getPixels()+y*m_pMaskBmp->getStride(); + unsigned char * pLine = pBmp->getPixels()+y*pBmp->getStride(); + switch (pBmp->getBytesPerPixel()) { + case 4: + for (int x = 0; x < size.x; x++) { + unsigned char src = *(pMaskLine+x); + unsigned char * pPixel = pLine + x*4; + *pPixel = (*pPixel*src)/255; + *(pPixel+1) = (*(pPixel+1)*src)/255; + *(pPixel+2) = (*(pPixel+2)*src)/255; + } + break; + case 3: + for (int x = 0; x < size.x; x++) { + unsigned char src = *(pMaskLine+x); + unsigned char * pPixel = pLine + x*3; + *pPixel = (*pPixel*src)/255; + *(pPixel+1) = (*(pPixel+1)*src)/255; + *(pPixel+2) = (*(pPixel+2)*src)/255; + } + break; + case 1: + for (int x = 0; x < size.x; x++) { + unsigned char src = *(pMaskLine+x); + unsigned char * pPixel = pLine + x; + *pPixel = (*pPixel*src)/255; + } + break; + default: + AVG_ASSERT(false); + } + } +} + +} |