background: Fix CI build breaking on gnome-desktop API change

The change was added in feeee1c. For now we will handle the old and the new API
until this can be built.

meson.build

@@ -121,7 +121,7 @@ colord_dep = dependency('colord', version: '>= 0.1.34')
 gdk_pixbuf_dep = dependency('gdk-pixbuf-2.0', version: '>= 2.23.0')
 gio_dep = dependency('gio-2.0')
 glib_dep = dependency('glib-2.0', version: '>= 2.56.0')
-gnome_desktop_dep = dependency('gnome-desktop-3.0', version: '>= 3.35.4')
+gnome_desktop_dep = dependency('gnome-desktop-3.0', version: '>= 3.27.90')
 gnome_settings_dep = dependency('gnome-settings-daemon', version: '>= 3.27.90')
 goa_dep = dependency('goa-1.0', version: goa_req_version)
 gsettings_desktop_dep = dependency('gsettings-desktop-schemas', version: '>= 3.31.0')

panels/background/cc-background-item.c

@@ -156,7 +156,11 @@ render_at_size (GnomeBG *bg,
         GdkPixbuf *pixbuf;
 
         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
+#ifdef GNOME_DESKTOP_BG_API_BREAK
         gnome_bg_draw (bg, pixbuf);
+#else
+        gnome_bg_draw (bg, pixbuf, gdk_screen_get_default (), FALSE);
+#endif
 
         return pixbuf;
 }

panels/background/meson.build

@@ -102,6 +102,10 @@ cflags += [
   '-DGNOME_DESKTOP_USE_UNSTABLE_API'
 ]
 
+if gnome_desktop_dep.version().version_compare('>=3.35.4')
+  cflags += '-DGNOME_DESKTOP_BG_API_BREAK'
+endif
+
 panels_libs += static_library(
   cappletname,
   sources: sources,