[gtk] gl renderer: Properly flip scaled fallback nodes

[Timm Bäder <baedert src gnome org>]

commit 78ee4c06779abedcc0c80684a38e70f3c8bb3081
Author: Timm Bäder <mail baedert org>
Date:   Thu May 30 09:12:24 2019 +0200

    gl renderer: Properly flip scaled fallback nodes
    
    Fixes cairo nodes in hidpi setups

 gsk/gl/gskglrenderer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index 43b9b1caa5..98e28a8034 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -497,7 +497,7 @@ render_fallback_node (GskGLRenderer       *self,
   /* We draw upside down here, so it matches what GL does. */
   cairo_save (cr);
   cairo_scale (cr, 1, -1);
-  cairo_translate (cr, 0, -surface_height);
+  cairo_translate (cr, 0, -surface_height / scale);
   cairo_set_source_surface (cr, rendered_surface, 0, 0);
   cairo_rectangle (cr, 0, 0, surface_width, surface_height);
   cairo_fill (cr);