claw 1.9.0
 
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xbm_writer.cpp
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1/*
2 CLAW - a C++ Library Absolutely Wonderful
3
4 CLAW is a free library without any particular aim but being useful to
5 anyone.
6
7 Copyright (C) 2005-2011 Julien Jorge
8
9 This library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 This library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with this library; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22
23 contact: julien.jorge@stuff-o-matic.com
24*/
30#include <claw/graphic/xbm.hpp>
31
32#include <iomanip>
33
38 : name("noname")
39 , hot(NULL)
40{}
41
48 const std::string& n, const claw::math::coordinate_2d<int>* h)
49 : name(n)
50 , hot(h)
51{}
52
58 : m_image(img)
59{}
60
67claw::graphic::xbm::writer::writer(const image& img, std::ostream& f,
68 const options& opt)
69 : m_image(img)
70{
71 save(f, opt);
72}
73
80 const options& opt) const
81{
82 CLAW_PRECOND(!!f);
83
84 f << "#define " << opt.name << "_width " << m_image.width() << "\n";
85 f << "#define " << opt.name << "_height " << m_image.height() << "\n";
86
87 if(opt.hot != NULL)
88 {
89 f << "#define " << opt.name << "_x_hot " << opt.hot->x << "\n";
90 f << "#define " << opt.name << "_y_hot " << opt.hot->y << "\n";
91 }
92
93 f << "static unsigned char " << opt.name << "_bits[] = {\n ";
94
95 save_bits(f);
96}
97
102void claw::graphic::xbm::writer::save_bits(std::ostream& f) const
103{
104 const unsigned int max_per_line = (80 - 1) / 6;
105 const unsigned int nb_pxl = m_image.width() * m_image.height();
106
107 unsigned int pxl_count = 0;
108 unsigned int per_line = 0;
109
110 for(unsigned int y = 0; y != m_image.height(); ++y)
111 {
112 unsigned int x = 0;
113
114 while(x != m_image.width())
115 {
116 unsigned int v(0);
117 unsigned int bits;
118
119 for(bits = 0; (x != m_image.width()) && (bits != 8);
120 ++bits, ++x, ++pxl_count)
121 {
122 v >>= 1;
123 if(m_image[y][x].luminosity() <= 127)
124 v |= 0x80;
125 }
126
127 v >>= 8 - bits;
128
129 ++per_line;
130
131 f << " 0x" << std::setw(2) << std::setfill('0') << std::hex << v;
132
133 if(pxl_count != nb_pxl)
134 {
135 f << ",";
136
137 if(per_line == max_per_line)
138 {
139 f << "\n ";
140 per_line = 0;
141 }
142 }
143 }
144 }
145
146 f << "};" << std::endl;
147}
#define CLAW_PRECOND(b)
Abort the program if a precondition is not true.
Definition assert.hpp:94
image()
Constructor. Creates an image without datas.
Definition image.cpp:95
void save(std::ostream &f, const options &opt=options()) const
Save the image in a XBM file.
writer(const image &img)
Constructor.
Coordinates in a two dimensional space.
value_type x
X-coordinate.
value_type y
Y-coordinate.
Parameters of the writing algorithm.
Definition xbm.hpp:99
const claw::math::coordinate_2d< int > * hot
The position of the hot spot in the image.
Definition xbm.hpp:111
std::string name
The name of the image structure in the file.
Definition xbm.hpp:108
A class for xbm pictures.