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authorXavier Claessens <xclaesse@src.gnome.org>2008-11-11 23:28:23 +0800
committerXavier Claessens <xclaesse@src.gnome.org>2008-11-11 23:28:23 +0800
commit923901ba1e7327d370051bc5abb684771f1f8b08 (patch)
treefa06a07eb857b2e835ec2e316cd2b5b8de1edf7f
parent6bbe8119ce3474518220dbbec1d8226d9f3f67ee (diff)
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Try to keep the original image format in avatar chooser. This avoid droping alpha layer when converting from PNG to JPEG.
svn path=/trunk/; revision=1713
-rw-r--r--libempathy-gtk/empathy-avatar-chooser.c127
1 files changed, 69 insertions, 58 deletions
diff --git a/libempathy-gtk/empathy-avatar-chooser.c b/libempathy-gtk/empathy-avatar-chooser.c
index dd902d42f..071a7edef 100644
--- a/libempathy-gtk/empathy-avatar-chooser.c
+++ b/libempathy-gtk/empathy-avatar-chooser.c
@@ -318,7 +318,7 @@ avatar_chooser_error_show (EmpathyAvatarChooser *chooser,
}
static gboolean
-str_in_strv (gchar *str,
+str_in_strv (const gchar *str,
gchar **strv)
{
if (strv == NULL) {
@@ -338,61 +338,71 @@ str_in_strv (gchar *str,
* satisfactory_mime_type.
*/
static gboolean
-can_satisfy_mime_type_requirements (gchar **accepted_mime_types,
- gchar **satisfactory_format_name,
- gchar **satisfactory_mime_type)
+avatar_chooser_need_mime_type_conversion (const gchar *current_mime_type,
+ gchar **accepted_mime_types,
+ gchar **satisfactory_format_name,
+ gchar **satisfactory_mime_type)
{
- gchar *name = NULL;
- gchar *type = NULL;
+ gchar *good_mime_types[] = {"image/jpeg", "image/png", NULL};
+ guint i;
+ GSList *formats, *l;
+ gboolean found = FALSE;
+ *satisfactory_format_name = NULL;
+ *satisfactory_mime_type = NULL;
+
+ /* If there is no accepted format there is nothing we can do */
if (accepted_mime_types == NULL || *accepted_mime_types == NULL) {
+ return TRUE;
+ }
+
+ /* If the current mime type is good and accepted, don't change it!
+ * jpeg is compress better pictures, but png is better for logos and
+ * could have an alpha layer. */
+ if (str_in_strv (current_mime_type, good_mime_types) &&
+ str_in_strv (current_mime_type, accepted_mime_types)) {
+ *satisfactory_mime_type = g_strdup (current_mime_type);
+ *satisfactory_format_name = g_strdup (current_mime_type +
+ strlen ("image/"));
return FALSE;
}
- /* Special-case png and jpeg to avoid accidentally saving to something
- * uncompressed like bmp. This assumes that we can write image/png and
- * image/jpeg; if this isn't true then something's really wrong with
- * GdkPixbuf.
- */
- if (str_in_strv ("image/jpeg", accepted_mime_types)) {
- name = g_strdup ("jpeg");
- type = g_strdup ("image/jpeg");
- } else if (str_in_strv ("image/png", accepted_mime_types)) {
- name = g_strdup ("png");
- type = g_strdup ("image/png");
- } else {
- GSList *formats, *l;
- gboolean found = FALSE;
+ /* The current mime type is either not accepted or not good to use.
+ * Check if one of the good format is supported... */
+ for (i = 0; good_mime_types[i] != NULL; i++) {
+ if (str_in_strv (good_mime_types[i], accepted_mime_types)) {
+ *satisfactory_mime_type = g_strdup (good_mime_types[i]);
+ *satisfactory_format_name = g_strdup (good_mime_types[i] +
+ strlen ("image/"));
+ return TRUE;
+ }
+ }
- formats = gdk_pixbuf_get_formats ();
- for (l = formats; !found && l != NULL; l = l->next) {
- GdkPixbufFormat *format = l->data;
- gchar **format_mime_types;
- gchar **iter;
+ /* Pick the first supported format we can write */
+ formats = gdk_pixbuf_get_formats ();
+ for (l = formats; !found && l != NULL; l = l->next) {
+ GdkPixbufFormat *format = l->data;
+ gchar **format_mime_types;
+ gchar **iter;
- if (!gdk_pixbuf_format_is_writable (format)) {
- continue;
- }
+ if (!gdk_pixbuf_format_is_writable (format)) {
+ continue;
+ }
- format_mime_types = gdk_pixbuf_format_get_mime_types (format);
- for (iter = format_mime_types; *iter != NULL; iter++) {
- if (str_in_strv (*iter, accepted_mime_types)) {
- name = gdk_pixbuf_format_get_name (format);
- type = g_strdup (*iter);
- found = TRUE;
- break;
- }
+ format_mime_types = gdk_pixbuf_format_get_mime_types (format);
+ for (iter = format_mime_types; *iter != NULL; iter++) {
+ if (str_in_strv (*iter, accepted_mime_types)) {
+ *satisfactory_format_name = gdk_pixbuf_format_get_name (format);
+ *satisfactory_mime_type = g_strdup (*iter);
+ found = TRUE;
+ break;
}
- g_strfreev (format_mime_types);
}
-
- g_slist_free (formats);
+ g_strfreev (format_mime_types);
}
+ g_slist_free (formats);
- *satisfactory_format_name = name;
- *satisfactory_mime_type = type;
-
- return name != NULL;
+ return TRUE;
}
static EmpathyAvatar *
@@ -434,25 +444,26 @@ avatar_chooser_maybe_convert_and_scale (EmpathyAvatarChooser *chooser,
max_factor = 1;
factor = 1;
- if (!can_satisfy_mime_type_requirements (mime_types, &new_format_name,
- &new_mime_type)) {
- avatar_chooser_error_show (chooser,
- _("Couldn't convert image"),
- _("None of the accepted image formats is supported on "
- "your system"));
- g_strfreev (mime_types);
- return NULL;
- }
-
- /* If the avatar is not already in the right type, it needs converting. */
- if (!str_in_strv (avatar->format, mime_types)) {
- DEBUG ("Image format %s not supported by the protocol",
- avatar->format);
-
+ /* Check if we need to convert to another image format */
+ if (avatar_chooser_need_mime_type_conversion (avatar->format,
+ mime_types,
+ &new_format_name,
+ &new_mime_type)) {
+ DEBUG ("Format conversion needed, we'll use mime type '%s' "
+ "and format name '%s'. Current mime type is '%s'",
+ new_mime_type, new_format_name, avatar->format);
needs_conversion = TRUE;
}
g_strfreev (mime_types);
+ /* If there is no format we can use, report error to the user. */
+ if (new_mime_type == NULL || new_format_name == NULL) {
+ avatar_chooser_error_show (chooser, _("Couldn't convert image"),
+ _("None of the accepted image formats is "
+ "supported on your system"));
+ return NULL;
+ }
+
/* If width or height are too big, it needs converting. */
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);