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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 <basegfx/color/bcolortools.hxx>
#include <vcl/bitmapaccess.hxx>
#include <bitmapwriteaccess.hxx>
#include <BitmapLightenFilter.hxx>
BitmapEx BitmapLightenFilter::execute(BitmapEx const& rBitmapEx)
{
const Size aSize(rBitmapEx.GetSizePixel());
Bitmap aBitmap(rBitmapEx.GetBitmap());
Bitmap aDarkBitmap(aSize, 24);
Bitmap::ScopedReadAccess pRead(aBitmap);
BitmapScopedWriteAccess pWrite(aDarkBitmap);
if (pRead && pWrite)
{
for (long nY = 0; nY < aSize.Height(); ++nY)
{
Scanline pScanline = pWrite->GetScanline(nY);
Scanline pScanlineRead = pRead->GetScanline(nY);
for (long nX = 0; nX < aSize.Width(); ++nX)
{
BitmapColor aBmpColor
= pRead->HasPalette()
? pRead->GetPaletteColor(pRead->GetIndexFromData(pScanlineRead, nX))
: pRead->GetPixelFromData(pScanlineRead, nX);
basegfx::BColor aBColor(aBmpColor.Invert().GetColor().getBColor());
aBColor = basegfx::utils::rgb2hsl(aBColor);
double fHue = aBColor.getRed();
fHue += 180.0;
while (fHue > 360.0)
{
fHue -= 360.0;
}
aBColor.setRed(fHue);
aBColor = basegfx::utils::hsl2rgb(aBColor);
aBmpColor.SetRed((aBColor.getRed() * 255.0) + 0.5);
aBmpColor.SetGreen((aBColor.getGreen() * 255.0) + 0.5);
aBmpColor.SetBlue((aBColor.getBlue() * 255.0) + 0.5);
pWrite->SetPixelOnData(pScanline, nX, aBmpColor);
}
}
}
pWrite.reset();
pRead.reset();
return BitmapEx(aDarkBitmap, rBitmapEx.GetAlpha());
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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