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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/BitmapDuoToneFilter.hxx>
#include <vcl/bitmapaccess.hxx>
#include <bitmapwriteaccess.hxx>
static inline sal_uInt8 lcl_getDuotoneColorComponent(sal_uInt8 base, sal_uInt16 color1,
sal_uInt16 color2)
{
color2 = color2 * base / 0xFF;
color1 = color1 * (0xFF - base) / 0xFF;
return static_cast<sal_uInt8>(color1 + color2);
}
BitmapEx BitmapDuoToneFilter::execute(BitmapEx const& rBitmapEx)
{
Bitmap aBitmap(rBitmapEx.GetBitmap());
const long nWidth = aBitmap.GetSizePixel().Width();
const long nHeight = aBitmap.GetSizePixel().Height();
Bitmap aResultBitmap(aBitmap.GetSizePixel(), 24);
Bitmap::ScopedReadAccess pReadAcc(aBitmap);
BitmapScopedWriteAccess pWriteAcc(aResultBitmap);
const BitmapColor aColorOne(static_cast<sal_uInt8>(mnColorOne >> 16),
static_cast<sal_uInt8>(mnColorOne >> 8),
static_cast<sal_uInt8>(mnColorOne));
const BitmapColor aColorTwo(static_cast<sal_uInt8>(mnColorTwo >> 16),
static_cast<sal_uInt8>(mnColorTwo >> 8),
static_cast<sal_uInt8>(mnColorTwo));
for (long x = 0; x < nWidth; x++)
{
for (long y = 0; y < nHeight; y++)
{
BitmapColor aColor = pReadAcc->GetColor(y, x);
sal_uInt8 nLuminance = aColor.GetLuminance();
BitmapColor aResultColor(
lcl_getDuotoneColorComponent(nLuminance, aColorOne.GetRed(), aColorTwo.GetRed()),
lcl_getDuotoneColorComponent(nLuminance, aColorOne.GetGreen(),
aColorTwo.GetGreen()),
lcl_getDuotoneColorComponent(nLuminance, aColorOne.GetBlue(), aColorTwo.GetBlue()));
pWriteAcc->SetPixel(y, x, aResultColor);
}
}
pWriteAcc.reset();
pReadAcc.reset();
aBitmap.ReassignWithSize(aResultBitmap);
return BitmapEx(aBitmap);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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