1 /*
2 Copyright (C) 2014 Johan Mattsson
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 using Cairo;
19 using Gee;
20
21 namespace BirdFont {
22
23 class AutoTrace {
24
25 ArrayList<string> files;
26
27 bool help;
28 bool quadratic_control_points;
29 double cutoff;
30 double details;
31 double simplification;
32
33 public AutoTrace (string[] arg) {
34 files = new ArrayList<string> ();
35 help = false;
36 quadratic_control_points = false;
37 cutoff = 1;
38 details = 1;
39 simplification = 0.5;
40
41 for (int i = 1; i < arg.length; i++) {
42 if (arg[i] == "-q" || arg[i] == "--quadratic") {
43 quadratic_control_points = true;
44 } else if (arg[i] == "-c" || arg[i] == "--cutoff" && i + 1 < arg.length) {
45 cutoff = double.parse (arg[i + 1]);
46 i++;
47 } else if (arg[i] == "-d" || arg[i] == "--details" && i + 1 < arg.length) {
48 details = double.parse (arg[i + 1]);
49 i++;
50 } else if (arg[i] == "-s" || arg[i] == "--simplification" && i + 1 < arg.length) {
51 simplification = double.parse (arg[i + 1]);
52 i++;
53 } else if (arg[i] == "-h" || arg[i] == "--help") {
54 help = true;
55 } else {
56 files.add (arg[i]);
57 }
58 }
59 }
60
61 public bool has_help_flag () {
62 return help;
63 }
64
65 public static void print_help (string[] arg) {
66 stdout.printf (t_("Usage:"));
67 stdout.printf (arg[0]);
68 stdout.printf (" [" + t_("OPTION") + " ...] " + t_("FILE") + " ..." + "\n");
69 stdout.printf ("-c, --cutoff " + t_("brighness cutoff, from 0.001 to 2, the default value is 1") + "\n");
70 stdout.printf ("-d, --details " + t_("details, from 0.001 to 9.999, the default value is 1") + "\n");
71 stdout.printf ("-h, --help " + t_("print this message") + "\n");
72 stdout.printf ("-q, --quadratic " + t_("use quadratic control points") + "\n");
73 stdout.printf ("-s, --simplification " + t_("simplification, from 0.001 to 1, the default value is 0.5") + "\n");
74 stdout.printf ("\n");
75 }
76
77 public int trace () {
78 BackgroundImage bg;
79 File file;
80 PathList pl;
81 Glyph g;
82 double w, h;
83 Font font;
84 string svg;
85 string file_name;
86 DataOutputStream data_stream;
87
88 foreach (string f in files) {
89 file = File.new_for_path (f);
90 if (!file.query_exists ()) {
91 stdout.printf (@"$f\n");
92 stdout.printf (t_("File does not exist.") + "\n");
93 return 1;
94 }
95
96 if (((!) file.get_basename ()).index_of (".") == -1) {
97 stdout.printf (@"$f\n");
98 stdout.printf (t_("Unknown file format.") + "\n");
99 return 2;
100 }
101 }
102
103 if (quadratic_control_points) {
104 DrawingTools.point_type = PointType.QUADRATIC;
105 } else {
106 DrawingTools.point_type = PointType.CUBIC;
107 }
108
109 foreach (string f in files) {
110 file_name = f;
111 file_name = file_name.substring (0, file_name.last_index_of ("."));
112 file_name = @"$file_name.svg";
113
114 stdout.printf (t_("Writing") + " " + file_name + "\n");
115
116 font = BirdFont.new_font ();
117 bg = new BackgroundImage (f);
118
119 DrawingTools.auto_trace_resolution.set_value_round (details);
120 DrawingTools.background_threshold.set_value_round (details);
121 DrawingTools.auto_trace_simplify.set_value_round (simplification);
122 bg.set_high_contrast (true);
123
124 g = new Glyph.no_lines ("");
125
126 GlyphCanvas.current_display = g;
127 BirdFont.current_glyph_collection = new GlyphCollection.with_glyph ('\0', "");
128
129 h = bg.get_img ().get_height ();
130
131 font.top_limit = h / 2;
132 font.bottom_limit = -h / 2;
133 font.top_position = h / 2;
134 font.bottom_position = -h / 2;
135
136 w = bg.get_img ().get_width ();
137 g.left_limit = -w / 2.0;
138 g.right_limit = w / 2.0;
139
140 bg.center_in_glyph ();
141
142 pl = bg.autotrace ();
143
144 foreach (Path p in pl.paths) {
145 g.add_path (p);
146 }
147
148 svg = ExportTool.export_to_string (g, false);
149
150 file = File.new_for_path (file_name);
151
152 try {
153 if (file.query_exists ()) {
154 file.delete ();
155 }
156
157 data_stream = new DataOutputStream (file.create (FileCreateFlags.REPLACE_DESTINATION));
158 data_stream.put_string (svg);
159 } catch (GLib.Error e) {
160 warning(e.message);
161 return 1;
162 }
163 }
164
165 return 0;
166 }
167 }
168
169 public static int main (string[] arg) {
170 AutoTrace autotrace;
171 Preferences p;
172
173 BirdFont.current_font = new Font ();
174
175 p = new Preferences ();
176
177 BirdFont.init_gettext ();
178 Theme.set_default_colors ();
179
180 DrawingTools.background_threshold = new SpinButton ();
181 DrawingTools.background_scale = new SpinButton ();
182 DrawingTools.auto_trace_resolution = new SpinButton ();
183 DrawingTools.auto_trace_simplify = new SpinButton ();
184
185 autotrace = new AutoTrace (arg);
186
187 if (autotrace.has_help_flag () || arg.length <= 1) {
188 AutoTrace.print_help (arg);
189 return 0;
190 }
191
192 return autotrace.trace ();
193 }
194
195 }
196