[eog] thumbnail: Remove use of obsolete gnome-desktop-thumbnail helper

[Felix Riemann <friemann src gnome org>]

commit 0e7749ba0bfac7e72c19841afcbebb10851533b4
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Jul 14 11:41:38 2017 +0200

    thumbnail: Remove use of obsolete gnome-desktop-thumbnail helper
    
    gnome_desktop_thumbnail_scale_down_pixbuf() is obsolete now that
    gdk-pixbuf doesn't have the same bugs when shrinking images by large
    factors.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784942

 configure.ac        |    2 +-
 src/eog-thumbnail.c |    9 +++++----
 2 files changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e991fd0..763fef2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -87,7 +87,7 @@ YELP_HELP_INIT
 GTK_REQUIRED=3.22.0
 GLIB_REQUIRED=2.42.0
 GNOME_DESKTOP_REQUIRED=2.91.2
-GDKPIXBUF_REQUIRED=2.30.0
+GDKPIXBUF_REQUIRED=2.36.5
 GTK_PRINT_REQUIRED=3.5.4
 SHARED_MIME_INFO_REQUIRED=0.20
 EXEMPI_REQUIRED=1.99.5
diff --git a/src/eog-thumbnail.c b/src/eog-thumbnail.c
index 2e9fdd0..2cc6fdf 100644
--- a/src/eog-thumbnail.c
+++ b/src/eog-thumbnail.c
@@ -123,9 +123,10 @@ create_thumbnail_from_pixbuf (EogThumbData *data,
 
        perc = CLAMP (128.0/(MAX (width, height)), 0, 1);
 
-       thumb = gnome_desktop_thumbnail_scale_down_pixbuf (pixbuf,
-                                                          width*perc,
-                                                          height*perc);
+       thumb = gdk_pixbuf_scale_simple (pixbuf,
+                                        width*perc,
+                                        height*perc,
+                                        GDK_INTERP_HYPER);
 
        return thumb;
 }
@@ -444,7 +445,7 @@ eog_thumbnail_fit_to_size (GdkPixbuf *thumbnail, gint dimension)
                width  = MAX (width  * factor, 1);
                height = MAX (height * factor, 1);
 
-               result_pixbuf = gnome_desktop_thumbnail_scale_down_pixbuf (thumbnail, width, height);
+               result_pixbuf = gdk_pixbuf_scale_simple (thumbnail, width, height, GDK_INTERP_HYPER);
 
                return result_pixbuf;
        }