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218 | /* -*- 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/bitmapaccess.hxx>
#include <vcl/BitmapMedianFilter.hxx>
#include <bitmapwriteaccess.hxx>
#define S2(a, b) \
{ \
long t; \
if ((t = b - a) < 0) \
{ \
a += t; \
b -= t; \
} \
}
#define MN3(a, b, c) \
S2(a, b); \
S2(a, c);
#define MX3(a, b, c) \
S2(b, c); \
S2(a, c);
#define MNMX3(a, b, c) \
MX3(a, b, c); \
S2(a, b);
#define MNMX4(a, b, c, d) \
S2(a, b); \
S2(c, d); \
S2(a, c); \
S2(b, d);
#define MNMX5(a, b, c, d, e) \
S2(a, b); \
S2(c, d); \
MN3(a, c, e); \
MX3(b, d, e);
#define MNMX6(a, b, c, d, e, f) \
S2(a, d); \
S2(b, e); \
S2(c, f); \
MN3(a, b, c); \
MX3(d, e, f);
BitmapEx BitmapMedianFilter::execute(BitmapEx const& rBitmapEx) const
{
Bitmap aBitmap(rBitmapEx.GetBitmap());
Bitmap::ScopedReadAccess pReadAcc(aBitmap);
bool bRet = false;
if (pReadAcc)
{
Bitmap aNewBmp(aBitmap.GetSizePixel(), 24);
BitmapScopedWriteAccess pWriteAcc(aNewBmp);
if (pWriteAcc)
{
const long nWidth = pWriteAcc->Width(), nWidth2 = nWidth + 2;
const long nHeight = pWriteAcc->Height(), nHeight2 = nHeight + 2;
std::unique_ptr<long[]> pColm(new long[nWidth2]);
std::unique_ptr<long[]> pRows(new long[nHeight2]);
std::unique_ptr<BitmapColor[]> pColRow1(new BitmapColor[nWidth2]);
std::unique_ptr<BitmapColor[]> pColRow2(new BitmapColor[nWidth2]);
std::unique_ptr<BitmapColor[]> pColRow3(new BitmapColor[nWidth2]);
BitmapColor* pRowTmp1 = pColRow1.get();
BitmapColor* pRowTmp2 = pColRow2.get();
BitmapColor* pRowTmp3 = pColRow3.get();
BitmapColor* pColor;
long nY, nX, i;
long nR1, nR2, nR3, nR4, nR5, nR6, nR7, nR8, nR9;
long nG1, nG2, nG3, nG4, nG5, nG6, nG7, nG8, nG9;
long nB1, nB2, nB3, nB4, nB5, nB6, nB7, nB8, nB9;
// create column LUT
for (i = 0; i < nWidth2; i++)
pColm[i] = (i > 0) ? (i - 1) : 0;
pColm[nWidth + 1] = pColm[nWidth];
// create row LUT
for (i = 0; i < nHeight2; i++)
pRows[i] = (i > 0) ? (i - 1) : 0;
pRows[nHeight + 1] = pRows[nHeight];
// read first three rows of bitmap color
if (nHeight2 > 2)
{
for (i = 0; i < nWidth2; i++)
{
pColRow1[i] = pReadAcc->GetColor(pRows[0], pColm[i]);
pColRow2[i] = pReadAcc->GetColor(pRows[1], pColm[i]);
pColRow3[i] = pReadAcc->GetColor(pRows[2], pColm[i]);
}
}
// do median filtering
for (nY = 0; nY < nHeight;)
{
Scanline pScanline = pWriteAcc->GetScanline(nY);
for (nX = 0; nX < nWidth; nX++)
{
pColor = pRowTmp1 + nX;
nR1 = pColor->GetRed();
nG1 = pColor->GetGreen();
nB1 = pColor->GetBlue();
nR2 = (++pColor)->GetRed();
nG2 = pColor->GetGreen();
nB2 = pColor->GetBlue();
nR3 = (++pColor)->GetRed();
nG3 = pColor->GetGreen();
nB3 = pColor->GetBlue();
pColor = pRowTmp2 + nX;
nR4 = pColor->GetRed();
nG4 = pColor->GetGreen();
nB4 = pColor->GetBlue();
nR5 = (++pColor)->GetRed();
nG5 = pColor->GetGreen();
nB5 = pColor->GetBlue();
nR6 = (++pColor)->GetRed();
nG6 = pColor->GetGreen();
nB6 = pColor->GetBlue();
pColor = pRowTmp3 + nX;
nR7 = pColor->GetRed();
nG7 = pColor->GetGreen();
nB7 = pColor->GetBlue();
nR8 = (++pColor)->GetRed();
nG8 = pColor->GetGreen();
nB8 = pColor->GetBlue();
nR9 = (++pColor)->GetRed();
nG9 = pColor->GetGreen();
nB9 = pColor->GetBlue();
MNMX6(nR1, nR2, nR3, nR4, nR5, nR6);<--- Variable 'nR1' is assigned a value that is never used.<--- Variable 'nR6' is assigned a value that is never used.
MNMX5(nR7, nR2, nR3, nR4, nR5);<--- Variable 'nR7' is assigned a value that is never used.<--- Variable 'nR5' is assigned a value that is never used.
MNMX4(nR8, nR2, nR3, nR4);<--- Variable 'nR8' is assigned a value that is never used.<--- Variable 'nR4' is assigned a value that is never used.
MNMX3(nR9, nR2, nR3);<--- Variable 'nR3' is assigned a value that is never used.<--- Variable 'nR9' is assigned a value that is never used.
MNMX6(nG1, nG2, nG3, nG4, nG5, nG6);<--- Variable 'nG1' is assigned a value that is never used.<--- Variable 'nG6' is assigned a value that is never used.
MNMX5(nG7, nG2, nG3, nG4, nG5);<--- Variable 'nG7' is assigned a value that is never used.<--- Variable 'nG5' is assigned a value that is never used.
MNMX4(nG8, nG2, nG3, nG4);<--- Variable 'nG8' is assigned a value that is never used.<--- Variable 'nG4' is assigned a value that is never used.
MNMX3(nG9, nG2, nG3);<--- Variable 'nG3' is assigned a value that is never used.<--- Variable 'nG9' is assigned a value that is never used.
MNMX6(nB1, nB2, nB3, nB4, nB5, nB6);<--- Variable 'nB1' is assigned a value that is never used.<--- Variable 'nB6' is assigned a value that is never used.
MNMX5(nB7, nB2, nB3, nB4, nB5);<--- Variable 'nB7' is assigned a value that is never used.<--- Variable 'nB5' is assigned a value that is never used.
MNMX4(nB8, nB2, nB3, nB4);<--- Variable 'nB8' is assigned a value that is never used.<--- Variable 'nB4' is assigned a value that is never used.
MNMX3(nB9, nB2, nB3);<--- Variable 'nB3' is assigned a value that is never used.<--- Variable 'nB9' is assigned a value that is never used.
// set destination color
pWriteAcc->SetPixelOnData(pScanline, nX,
BitmapColor(static_cast<sal_uInt8>(nR2),
static_cast<sal_uInt8>(nG2),
static_cast<sal_uInt8>(nB2)));
}
if (++nY < nHeight)
{
if (pRowTmp1 == pColRow1.get())
{
pRowTmp1 = pColRow2.get();
pRowTmp2 = pColRow3.get();
pRowTmp3 = pColRow1.get();
}
else if (pRowTmp1 == pColRow2.get())
{
pRowTmp1 = pColRow3.get();
pRowTmp2 = pColRow1.get();
pRowTmp3 = pColRow2.get();
}
else
{
pRowTmp1 = pColRow1.get();
pRowTmp2 = pColRow2.get();
pRowTmp3 = pColRow3.get();
}
for (i = 0; i < nWidth2; i++)
pRowTmp3[i] = pReadAcc->GetColor(pRows[nY + 2], pColm[i]);
}
}
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 BitmapEx(aBitmap);
return BitmapEx();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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