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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <vcl/bitmap.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/BitmapSolarizeFilter.hxx>
#include <bitmapwriteaccess.hxx>
BitmapEx BitmapSolarizeFilter::execute(BitmapEx const& rBitmapEx) const
{
Bitmap aBitmap(rBitmapEx.GetBitmap());
bool bRet = false;
BitmapScopedWriteAccess pWriteAcc(aBitmap);
if (pWriteAcc)
{
if (pWriteAcc->HasPalette())
{
const BitmapPalette& rPal = pWriteAcc->GetPalette();
for (sal_uInt16 i = 0, nCount = rPal.GetEntryCount(); i < nCount; i++)
{
if (rPal[i].GetLuminance() >= mcSolarGreyThreshold)
{
BitmapColor aCol(rPal[i]);
aCol.Invert();
pWriteAcc->SetPaletteColor(i, aCol);
}
}
}
else
{
BitmapColor aCol;
const long nWidth = pWriteAcc->Width();
const long nHeight = pWriteAcc->Height();
for (long nY = 0; nY < nHeight; nY++)
{
Scanline pScanline = pWriteAcc->GetScanline(nY);
for (long nX = 0; nX < nWidth; nX++)
{
aCol = pWriteAcc->GetPixelFromData(pScanline, nX);
if (aCol.GetLuminance() >= mcSolarGreyThreshold)
{
aCol.Invert();
pWriteAcc->SetPixelOnData(pScanline, nX, aCol);
}
}
}
}
pWriteAcc.reset();
bRet = true;
}
if (bRet)
return BitmapEx(aBitmap);
return BitmapEx();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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