1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/* -*- 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 <tools/helpers.hxx>
#include <vcl/bitmap.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/bitmapaccess.hxx>
#include <vcl/BitmapConvolutionMatrixFilter.hxx>
#include <vcl/BitmapSharpenFilter.hxx>
#include <bitmapwriteaccess.hxx>
#include <array>
BitmapEx BitmapConvolutionMatrixFilter::execute(BitmapEx const& rBitmapEx) const
{
Bitmap aBitmap(rBitmapEx.GetBitmap());
const tools::Long nDivisor = 8;
Bitmap::ScopedReadAccess pReadAcc(aBitmap);
bool bRet = false;
if (pReadAcc)
{
Bitmap aNewBmp(aBitmap.GetSizePixel(), 24);
BitmapScopedWriteAccess pWriteAcc(aNewBmp);
if (pWriteAcc)
{
const tools::Long nWidth = pWriteAcc->Width(), nWidth2 = nWidth + 2;
const tools::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;
tools::Long nY, nX, i, nSumR, nSumG, nSumB, nMatrixVal, nTmp;
std::array<std::array<long, 256>, 9> aKoeff;
tools::Long* pTmp;
// create LUT of products of matrix value and possible color component values
for (nY = 0; nY < 9; nY++)
{
for (nX = nTmp = 0, nMatrixVal = mrMatrix[nY]; nX < 256; nX++, nTmp += nMatrixVal)
{
aKoeff[nY][nX] = nTmp;
}
}
// 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
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 convolution
for (nY = 0; nY < nHeight;)
{
Scanline pScanline = pWriteAcc->GetScanline(nY);
for (nX = 0; nX < nWidth; nX++)
{
// first row
pTmp = aKoeff[0].data();
pColor = pRowTmp1 + nX;
nSumR = pTmp[pColor->GetRed()];
nSumG = pTmp[pColor->GetGreen()];
nSumB = pTmp[pColor->GetBlue()];
pTmp = aKoeff[1].data();
nSumR += pTmp[(++pColor)->GetRed()];
nSumG += pTmp[pColor->GetGreen()];
nSumB += pTmp[pColor->GetBlue()];
pTmp = aKoeff[2].data();
nSumR += pTmp[(++pColor)->GetRed()];
nSumG += pTmp[pColor->GetGreen()];
nSumB += pTmp[pColor->GetBlue()];
// second row
pTmp = aKoeff[3].data();
pColor = pRowTmp2 + nX;
nSumR += pTmp[pColor->GetRed()];
nSumG += pTmp[pColor->GetGreen()];
nSumB += pTmp[pColor->GetBlue()];
pTmp = aKoeff[4].data();
nSumR += pTmp[(++pColor)->GetRed()];
nSumG += pTmp[pColor->GetGreen()];
nSumB += pTmp[pColor->GetBlue()];
pTmp = aKoeff[5].data();
nSumR += pTmp[(++pColor)->GetRed()];
nSumG += pTmp[pColor->GetGreen()];
nSumB += pTmp[pColor->GetBlue()];
// third row
pTmp = aKoeff[6].data();
pColor = pRowTmp3 + nX;
nSumR += pTmp[pColor->GetRed()];
nSumG += pTmp[pColor->GetGreen()];
nSumB += pTmp[pColor->GetBlue()];
pTmp = aKoeff[7].data();
nSumR += pTmp[(++pColor)->GetRed()];
nSumG += pTmp[pColor->GetGreen()];
nSumB += pTmp[pColor->GetBlue()];
pTmp = aKoeff[8].data();
nSumR += pTmp[(++pColor)->GetRed()];
nSumG += pTmp[pColor->GetGreen()];
nSumB += pTmp[pColor->GetBlue()];
// calculate destination color
pWriteAcc->SetPixelOnData(
pScanline, nX,
BitmapColor(static_cast<sal_uInt8>(MinMax(nSumR / nDivisor, 0, 255)),
static_cast<sal_uInt8>(MinMax(nSumG / nDivisor, 0, 255)),
static_cast<sal_uInt8>(MinMax(nSumB / nDivisor, 0, 255))));
}
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();
}
const tools::Long g_SharpenMatrix[] = { -1, -1, -1, -1, 16, -1, -1, -1, -1 };
BitmapSharpenFilter::BitmapSharpenFilter()
: BitmapConvolutionMatrixFilter(g_SharpenMatrix)
{
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
