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Diffstat (limited to 'utils/viewer-main.c')
| -rw-r--r-- | utils/viewer-main.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/utils/viewer-main.c b/utils/viewer-main.c new file mode 100644 index 00000000..525599a7 --- /dev/null +++ b/utils/viewer-main.c @@ -0,0 +1,182 @@ +/* viewer-main.c: Main routine for viewers + * + * Copyright (C) 1999,2004,2005 Red Hat, Inc. + * Copyright (C) 2001 Sun Microsystems + * Copyright (C) 2006 Behdad Esfahbod + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ +#include "config.h" +#include <errno.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <locale.h> + +#include <glib.h> +#include <glib/gstdio.h> + +#ifdef G_OS_UNIX +#include <sys/wait.h> +#endif + +#include "viewer.h" +#include "viewer-render.h" + +int +main (int argc, + char **argv) +{ + const PangoViewer *view; + gpointer instance; + PangoContext *context; + int run; + int width, height; + gpointer surface; + +#if !GLIB_CHECK_VERSION (2, 35, 3) + g_type_init(); +#endif + g_set_prgname ("pango-view"); + setlocale (LC_ALL, ""); + parse_options (argc, argv); + + view = opt_viewer; + + g_assert (view->id); + + instance = view->create (view); + context = view->get_context (instance); + width = height = 1; + surface = view->create_surface (instance, width, height); + view->render (instance, surface, context, &width, &height, NULL); + view->destroy_surface (instance, surface); + surface = view->create_surface (instance, width, height); + for (run = 0; run < MAX(1,opt_runs); run++) + view->render (instance, surface, context, &width, &height, NULL); + + if (opt_output) + { + if (!view->write) + fail ("%s viewer backend does not support writing", view->name); + else + { + FILE *stream; + GPid pid = 0; + + if (view->write_suffix && g_str_has_suffix (opt_output, view->write_suffix)) + { + stream = g_fopen (opt_output, "wb"); + if (!stream) + fail ("Cannot open output file %s: %s\n", + opt_output, g_strerror (errno)); + } + else + { + int fd; + const gchar *convert_argv[4] = {"convert", "-", "%s"}; + GError *error; + + convert_argv[2] = opt_output; + + if (!g_spawn_async_with_pipes (NULL, (gchar **)(void*)convert_argv, NULL, + G_SPAWN_DO_NOT_REAP_CHILD | + G_SPAWN_SEARCH_PATH | + G_SPAWN_STDOUT_TO_DEV_NULL | + G_SPAWN_STDERR_TO_DEV_NULL, + NULL, NULL, &pid, &fd, NULL, NULL, &error)) + fail ("When running ImageMagick 'convert' command: %s\n", error->message); + stream = fdopen (fd, "wb"); + } + view->write (instance, surface, stream, width, height); + fclose (stream); +#ifdef G_OS_UNIX + if (pid) + waitpid (pid, NULL, 0); +#endif + } + } + + if (opt_display) + { + char *title; + title = get_options_string (); + + if (view->display) + { + gpointer window = NULL; + gpointer state = NULL; + + if (view->create_window) + { + window = view->create_window (instance, title, width, height); + if (!window) + goto no_display; + } + + opt_display = FALSE; + while (1) + { + state = view->display (instance, surface, window, width, height, state); + if (state == GINT_TO_POINTER (-1)) + break; + + view->render (instance, surface, context, &width, &height, state); + } + + if (view->destroy_window) + view->destroy_window (instance, window); + } +no_display: + + /* If failed to display natively, call ImageMagick */ + if (opt_display) + { + int fd; + FILE *stream; + const gchar *display_argv[5] = {"display", "-title", "%s", "-"}; + GError *error = NULL; + GPid pid; + + if (!view->write) + fail ("%s viewer backend does not support displaying or writing", view->name); + display_argv[2] = title; + + if (!g_spawn_async_with_pipes (NULL, (gchar **)(void*)display_argv, NULL, + G_SPAWN_DO_NOT_REAP_CHILD | + G_SPAWN_SEARCH_PATH | + G_SPAWN_STDOUT_TO_DEV_NULL | + G_SPAWN_STDERR_TO_DEV_NULL, + NULL, NULL, &pid, &fd, NULL, NULL, &error)) + fail ("When running ImageMagick 'display' command: %s\n", error->message); + stream = fdopen (fd, "wb"); + view->write (instance, surface, stream, width, height); + fclose (stream); +#ifdef G_OS_UNIX + waitpid (pid, NULL, 0); +#endif + g_spawn_close_pid (pid); + } + + g_free (title); + } + + view->destroy_surface (instance, surface); + g_object_unref (context); + view->destroy (instance); + finalize (); + return 0; +} |