File gtk3-icon-theme-reduce-io.patch of Package gtk3

diff --git a/gtk/gtkicontheme.c b/gtk/gtkicontheme.c
index 8e3198c..7fdafd4 100644
--- a/gtk/gtkicontheme.c
+++ b/gtk/gtkicontheme.c
@@ -268,6 +268,7 @@ struct _GtkIconInfo
   guint raw_coordinates : 1;
   guint forced_size     : 1;
   guint emblems_applied : 1;
+  guint is_svg          : 1;
 
   /* Cached information if we go ahead and try to load
    * the icon.
@@ -1726,6 +1727,7 @@ choose_icon (GtkIconTheme       *icon_theme,
 	icon_info->filename = g_strdup (unthemed_icon->no_svg_filename);
 
       icon_info->icon_file = g_file_new_for_path (icon_info->filename);
+      icon_info->is_svg = suffix_from_name (icon_info->filename) == ICON_SUFFIX_SVG;
     }
 
  out:
@@ -2876,6 +2878,7 @@ theme_lookup_icon (IconTheme          *theme,
           file = g_strconcat (icon_name, string_from_suffix (suffix), NULL);
           icon_info->filename = g_build_filename (min_dir->dir, file, NULL);
           icon_info->icon_file = g_file_new_for_path (icon_info->filename);
+          icon_info->is_svg = suffix == ICON_SUFFIX_SVG;
           g_free (file);
         }
       else
@@ -3313,6 +3316,7 @@ icon_info_new (IconThemeDirType type, int dir_size, int dir_scale)
   icon_info->dir_size = dir_size;
   icon_info->dir_scale = dir_scale;
   icon_info->unscaled_scale = 1.0;
+  icon_info->is_svg = FALSE;
 
   return icon_info;
 }
@@ -3680,30 +3684,7 @@ icon_info_ensure_scale_and_pixbuf (GtkIconInfo  *icon_info,
 
   scaled_desired_size = icon_info->desired_size * icon_info->desired_scale;
 
-  is_svg = FALSE;
-  if (G_IS_FILE_ICON (icon_info->loadable))
-    {
-      GFile *file;
-      GFileInfo *file_info;
-      const gchar *content_type;
-
-      file = g_file_icon_get_file (G_FILE_ICON (icon_info->loadable));
-      file_info = g_file_query_info (file, 
-                                     G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
-                                     G_FILE_QUERY_INFO_NONE,
-                                     NULL, NULL);
-      if (file_info) 
-        {
-          content_type = g_file_info_get_content_type (file_info);
-
-          if (content_type && strcmp (content_type, "image/svg+xml") == 0)
-            is_svg = TRUE;
-
-          g_object_unref (file_info);
-       }
-    }
-
-  if (is_svg)
+  if (icon_info->is_svg)
     {
       GInputStream *stream;
 
@@ -5283,6 +5264,7 @@ gtk_icon_theme_lookup_by_gicon_for_scale (GtkIconTheme       *icon_theme,
     {
       info = icon_info_new (ICON_THEME_DIR_UNTHEMED, size, 1);
       info->loadable = G_LOADABLE_ICON (g_object_ref (icon));
+      info->is_svg = FALSE;
 
       if (G_IS_FILE_ICON (icon))
         {
@@ -5291,6 +5273,7 @@ gtk_icon_theme_lookup_by_gicon_for_scale (GtkIconTheme       *icon_theme,
             {
               info->icon_file = g_object_ref (file);
               info->filename = g_file_get_path (file);
+              info->is_svg = suffix_from_name (info->filename) == ICON_SUFFIX_SVG;
             }
         }
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