1/* viewer-main.c: Main routine for viewers
2 *
3 * Copyright (C) 1999,2004,2005 Red Hat, Inc.
4 * Copyright (C) 2001 Sun Microsystems
5 * Copyright (C) 2006 Behdad Esfahbod
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
21 */
22#include "config.h"
23#include <errno.h>
24#include <stdlib.h>
25#include <stdio.h>
26#include <string.h>
27#include <locale.h>
28
29#include <glib.h>
30#include <glib/gstdio.h>
31
32#ifdef G_OS_UNIX
33#include <sys/wait.h>
34#endif
35
36#include "viewer.h"
37#include "viewer-render.h"
38
39int
40main (int argc,
41 char **argv)
42{
43 const PangoViewer *view;
44 gpointer instance;
45 PangoContext *context;
46 int run;
47 int width, height;
48 gpointer surface;
49
50 g_set_prgname (prgname: "pango-view");
51 setlocale (LC_ALL, locale: "");
52 parse_options (argc, argv);
53
54 view = opt_viewer;
55
56 g_assert (view->id);
57
58 instance = view->create (view);
59 context = view->get_context (instance);
60 width = height = 1;
61 surface = view->create_surface (instance, width, height);
62 view->render (instance, surface, context, &width, &height, NULL);
63 view->destroy_surface (instance, surface);
64 surface = view->create_surface (instance, width, height);
65 for (run = 0; run < MAX(1,opt_runs); run++)
66 view->render (instance, surface, context, &width, &height, NULL);
67
68 if (opt_output)
69 {
70 if (!view->write)
71 fail (format: "%s viewer backend does not support writing", view->name);
72 else
73 {
74 FILE *stream;
75 GPid pid = 0;
76
77 if (view->write_suffix && g_str_has_suffix (str: opt_output, suffix: view->write_suffix))
78 {
79 stream = g_fopen (filename: opt_output, modes: "wb");
80 if (!stream)
81 fail (format: "Cannot open output file %s: %s\n",
82 opt_output, g_strerror (errno));
83 }
84 else
85 {
86 int fd;
87 const gchar *convert_argv[5] = {"gm", "convert", "-", "%s"};
88 GError *error;
89
90 convert_argv[3] = opt_output;
91
92 if (!g_spawn_async_with_pipes (NULL, argv: (gchar **)(void*)convert_argv, NULL,
93 flags: G_SPAWN_DO_NOT_REAP_CHILD |
94 G_SPAWN_SEARCH_PATH |
95 G_SPAWN_STDOUT_TO_DEV_NULL |
96 G_SPAWN_STDERR_TO_DEV_NULL,
97 NULL, NULL, child_pid: &pid, standard_input: &fd, NULL, NULL, error: &error))
98 fail (format: "When running GraphicsMagick 'gm convert' command: %s\n", error->message);
99 stream = fdopen (fd: fd, modes: "wb");
100 }
101 view->write (instance, surface, stream, width, height);
102 fclose (stream: stream);
103#ifdef G_OS_UNIX
104 if (pid)
105 waitpid (pid: pid, NULL, options: 0);
106#endif
107 }
108 }
109
110 if (opt_display)
111 {
112 char *title;
113 title = get_options_string ();
114
115 if (view->display)
116 {
117 gpointer window = NULL;
118 gpointer state = NULL;
119
120 if (view->create_window)
121 {
122 window = view->create_window (instance, title, width, height);
123 if (!window)
124 goto no_display;
125 }
126
127 opt_display = FALSE;
128 while (1)
129 {
130 state = view->display (instance, surface, window, width, height, state);
131 if (state == GINT_TO_POINTER (-1))
132 break;
133
134 view->render (instance, surface, context, &width, &height, state);
135 }
136
137 if (view->destroy_window)
138 view->destroy_window (instance, window);
139 }
140no_display:
141
142 /* If failed to display natively, call GraphicsMagick */
143 if (opt_display)
144 {
145 int fd;
146 FILE *stream;
147 const gchar *display_argv[6] = {"gm", "display", "-title", "%s", "-"};
148 GError *error = NULL;
149 GPid pid;
150
151 if (!view->write)
152 fail (format: "%s viewer backend does not support displaying or writing", view->name);
153 display_argv[3] = title;
154
155 if (!g_spawn_async_with_pipes (NULL, argv: (gchar **)(void*)display_argv, NULL,
156 flags: G_SPAWN_DO_NOT_REAP_CHILD |
157 G_SPAWN_SEARCH_PATH |
158 G_SPAWN_STDOUT_TO_DEV_NULL |
159 G_SPAWN_STDERR_TO_DEV_NULL,
160 NULL, NULL, child_pid: &pid, standard_input: &fd, NULL, NULL, error: &error))
161 fail (format: "When running GraphicsMagick 'gm display' command: %s\n", error->message);
162 stream = fdopen (fd: fd, modes: "wb");
163 view->write (instance, surface, stream, width, height);
164 fclose (stream: stream);
165#ifdef G_OS_UNIX
166 waitpid (pid: pid, NULL, options: 0);
167#endif
168 g_spawn_close_pid (pid);
169 }
170
171 g_free (mem: title);
172 }
173
174 view->destroy_surface (instance, surface);
175 g_object_unref (object: context);
176 view->destroy (instance);
177 finalize ();
178 return 0;
179}
180

source code of gtk/subprojects/pango/utils/viewer-main.c