1 files changed, 136 insertions, 0 deletions
diff --git a/src/eom-pixbuf-util.c b/src/eom-pixbuf-util.c
new file mode 100644
index 0000000..837bb42
--- /dev/null
+++ b/src/eom-pixbuf-util.c
@@ -0,0 +1,136 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include "eom-pixbuf-util.h"
+
+GSList*
+eom_pixbuf_get_savable_formats (void)
+{
+	GSList *list;
+	GSList *write_list = NULL;
+	GSList *it;
+
+	list = gdk_pixbuf_get_formats ();
+
+	for (it = list; it != NULL; it = it->next) {
+		GdkPixbufFormat *format;
+
+		format = (GdkPixbufFormat*) it->data;
+		if (gdk_pixbuf_format_is_writable (format)) {
+			write_list = g_slist_prepend (write_list, format);
+		}
+	}
+
+	g_slist_free (list);
+	write_list = g_slist_reverse (write_list);
+
+	return write_list;
+}
+
+GdkPixbufFormat*
+eom_pixbuf_get_format_by_suffix (const char *suffix)
+{
+	GSList *list;
+	GSList *it;
+	GdkPixbufFormat *result = NULL;
+
+	g_return_val_if_fail (suffix != NULL, NULL);
+
+	list = gdk_pixbuf_get_formats ();
+
+	for (it = list; (it != NULL) && (result == NULL); it = it->next) {
+		GdkPixbufFormat *format;
+		gchar **extensions;
+		int i;
+
+		format = (GdkPixbufFormat*) it->data;
+
+		extensions = gdk_pixbuf_format_get_extensions (format);
+		for (i = 0; extensions[i] != NULL; i++) {
+			/* g_print ("check extension: %s against %s\n", extensions[i], suffix); */
+			if (g_ascii_strcasecmp (suffix, extensions[i]) == 0) {
+				result = format;
+				break;
+			}
+		}
+
+		g_strfreev (extensions);
+	}
+
+	g_slist_free (list);
+
+	return result;
+}
+
+char*
+eom_pixbuf_get_common_suffix (GdkPixbufFormat *format)
+{
+	char **extensions;
+	int i;
+	char *result = NULL;
+
+	if (format == NULL) return NULL;
+
+	extensions = gdk_pixbuf_format_get_extensions (format);
+	if (extensions[0] == NULL) return NULL;
+
+	/* try to find 3-char suffix first, use the last occurence */
+	for (i = 0; extensions [i] != NULL; i++) {
+		if (strlen (extensions[i]) <= 3) {
+			g_free (result);
+			result = g_ascii_strdown (extensions[i], -1);
+		}
+	}
+
+	/* otherwise take the first one */
+	if (result == NULL) {
+		result = g_ascii_strdown (extensions[0], -1);
+	}
+
+	g_strfreev (extensions);
+
+	return result;
+}
+
+static char*
+get_suffix_from_basename (const char *basename)
+{
+	char *suffix;
+	char *suffix_start;
+	guint len;
+
+	/* FIXME: does this work for all locales? */
+	suffix_start = g_utf8_strrchr (basename, -1, '.');
+
+	if (suffix_start == NULL)
+		return NULL;
+
+	len = strlen (suffix_start) - 1;
+	suffix = g_strndup (suffix_start+1, len);
+
+	return suffix;
+
+}
+
+GdkPixbufFormat *
+eom_pixbuf_get_format (GFile *file)
+{
+	GdkPixbufFormat *format;
+	char *path, *basename, *suffix;
+	g_return_val_if_fail (file != NULL, NULL);
+
+	path = g_file_get_path (file);
+	basename = g_path_get_basename (path);
+	suffix = get_suffix_from_basename (basename);
+
+	format = eom_pixbuf_get_format_by_suffix (suffix);
+
+	g_free (path);
+	g_free (basename);
+	g_free (suffix);
+
+	return format;
+}
+