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
|
/*************************************************************************
** Bitmap.h **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2013 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef BITMAP_H
#define BITMAP_H
#include <ostream>
#include <vector>
#include "types.h"
class Bitmap
{
public:
struct ForAllData {
virtual ~ForAllData() {}
virtual void pixel (int x, int y, bool set, Bitmap &bm) {}
virtual void pixel (int x, int y, bool set, const Bitmap &bm) {}
};
public:
Bitmap ();
Bitmap (int minx, int maxx, int miny , int maxy);
void resize (int minx, int maxx, int miny , int maxy);
void setBits(int r, int c, int n);
const UInt8* operator[] (int r) const {return &_bytes[r*_bpr];}
int height () const {return _rows;}
int width () const {return _cols;}
int xshift () const {return _xshift;}
int yshift () const {return _yshift;}
int bytesPerRow () const {return _bpr;}
bool empty () const {return (!_rows && !_cols) || _bytes.empty();}
void bbox (int &w, int &h) const;
void forAllPixels (ForAllData &data) const;
template <typename T>
int copy (std::vector<T> &target, bool vflip=false) const;
// template <typename T>
// void write (std::ostream &os, const std::vector<T> &v) const;
std::ostream& write (std::ostream &os) const;
private:
int _rows, _cols; ///< number of rows, columns
int _xshift, _yshift; ///< horizontal/vertical shift
int _bpr; ///< number of bytes per row
std::vector<UInt8> _bytes;
};
/** Copies the bitmap to a new target area and reorganize the bits.
* @param[out] target points to first T of new bitmap (must be deleted after usage)
* @param[in] vflip true if the new bitmap should be flipped vertically
* @return number of Ts per row */
template <typename T>
int Bitmap::copy (std::vector<T> &target, bool vflip) const {
const int s = sizeof(T);
const int tpr = _bpr/s + (_bpr%s ? 1 : 0); // number of Ts per row
target.resize(_rows*tpr);
for (int r=0; r < _rows; r++) {
int targetrow = vflip ? _rows-r-1 : r;
for (int b=0; b < _bpr; b++) {
T &t = target[targetrow*tpr + b/s];
T chunk = (T)_bytes[r*_bpr+b] << (8*(s-1-b%s));
if (b % s == 0)
t = chunk;
else
t |= chunk;
}
}
return tpr;
}
/*
template <typename T>
void Bitmap::write (std::ostream &os, const std::vector<T> &v) const {
const int s = sizeof(T);
const int tpr = _bpr/s + (_bpr%s ? 1 : 0); // number of Ts per row
for (int r=_rows-1; r >= 0; r--) {
for (int t=0; t < tpr; t++) {
for (T b=(T)1<<(8*s-1); b; b>>=1)
os << ((v[r*tpr+t] & b) ? '*' : '-');
os << ' ';
}
os << std::endl;
}
}*/
#endif
|
