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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 <sal/config.h>
#include <o3tl/clamp.hxx>
#include <vcl/bitmap.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/bitmapaccess.hxx>
#include <vcl/BitmapSepiaFilter.hxx>
#include <bitmapwriteaccess.hxx>
BitmapEx BitmapSepiaFilter::execute(BitmapEx const& rBitmapEx) const
{
Bitmap aBitmap(rBitmapEx.GetBitmap());
Bitmap::ScopedReadAccess pReadAcc(aBitmap);
bool bRet = false;
if (pReadAcc)
{
const long nSepia
= 10000 - 100 * o3tl::clamp(mnSepiaPercent, sal_uInt16(0), sal_uInt16(100));
BitmapPalette aSepiaPal(256);
for (sal_uInt16 i = 0; i < 256; i++)
{
BitmapColor& rCol = aSepiaPal[i];
const sal_uInt8 cSepiaValue = static_cast<sal_uInt8>(nSepia * i / 10000);
rCol.SetRed(static_cast<sal_uInt8>(i));
rCol.SetGreen(cSepiaValue);
rCol.SetBlue(cSepiaValue);
}
Bitmap aNewBmp(aBitmap.GetSizePixel(), 8, &aSepiaPal);
BitmapScopedWriteAccess pWriteAcc(aNewBmp);
if (pWriteAcc)
{
BitmapColor aCol(sal_uInt8(0));
const long nWidth = pWriteAcc->Width();
const long nHeight = pWriteAcc->Height();
if (pReadAcc->HasPalette())
{
const sal_uInt16 nPalCount = pReadAcc->GetPaletteEntryCount();
std::unique_ptr<sal_uInt8[]> pIndexMap(new sal_uInt8[nPalCount]);
for (sal_uInt16 i = 0; i < nPalCount; i++)
{
pIndexMap[i] = pReadAcc->GetPaletteColor(i).GetLuminance();
}
for (long nY = 0; nY < nHeight; nY++)
{
Scanline pScanline = pWriteAcc->GetScanline(nY);
Scanline pScanlineRead = pReadAcc->GetScanline(nY);
for (long nX = 0; nX < nWidth; nX++)
{
aCol.SetIndex(pIndexMap[pReadAcc->GetIndexFromData(pScanlineRead, nX)]);
pWriteAcc->SetPixelOnData(pScanline, nX, aCol);
}
}
}
else
{
for (long nY = 0; nY < nHeight; nY++)
{
Scanline pScanline = pWriteAcc->GetScanline(nY);
Scanline pScanlineRead = pReadAcc->GetScanline(nY);
for (long nX = 0; nX < nWidth; nX++)
{
aCol.SetIndex(pReadAcc->GetPixelFromData(pScanlineRead, nX).GetLuminance());
pWriteAcc->SetPixelOnData(pScanline, nX, aCol);
}
}
}
pWriteAcc.reset();
bRet = true;
}
pReadAcc.reset();
if (bRet)
{
const MapMode aMap(aBitmap.GetPrefMapMode());
const Size aPrefSize(aBitmap.GetPrefSize());
aBitmap = aNewBmp;
aBitmap.SetPrefMapMode(aMap);
aBitmap.SetPrefSize(aPrefSize);
}
}
if (bRet)
return rBitmapEx;
return BitmapEx();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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