[pango/wip/baedert/for-master] pangocairo-context: Don't invalidate if font options are equal

[Timm Bäder <baedert src gnome org>]

commit 156d06951b08d4ac0d20287c4e0dce5c4e4634ce
Author: Timm Bäder <mail baedert org>
Date:   Tue Apr 14 10:49:49 2020 +0200

    pangocairo-context: Don't invalidate if font options are equal

 pango/pangocairo-context.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/pango/pangocairo-context.c b/pango/pangocairo-context.c
index 5949c448..959fcfe0 100644
--- a/pango/pangocairo-context.c
+++ b/pango/pangocairo-context.c
@@ -242,7 +242,15 @@ pango_cairo_context_set_font_options (PangoContext               *context,
 
   g_return_if_fail (PANGO_IS_CONTEXT (context));
 
-  info  = get_context_info (context, TRUE);
+  info = get_context_info (context, TRUE);
+
+  if (!info->set_options && !options)
+    return;
+
+  if (info->set_options &&
+      options &&
+      cairo_font_options_equal (info->set_options, options))
+    return;
 
   if (info->set_options || options)
     pango_context_changed (context);