[gtk/fallback-rendering: 2/3] gl: Use the fallback debug flag

[Matthias Clasen <matthiasc src gnome org>]

commit d4c97ea2b4e05df4c3540baa26a32462109ed6d1
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Oct 30 22:30:34 2019 -0400

    gl: Use the fallback debug flag
    
    This debug flag was unused; use it to enable
    fallback highlighting at runtime.

 gsk/gl/gskglrenderer.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index de9ccf1539..1e1086d761 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -36,7 +36,6 @@
 #define ORTHO_NEAR_PLANE        -10000
 #define ORTHO_FAR_PLANE          10000
 
-#define HIGHLIGHT_FALLBACK 0
 #define DEBUG_OPS          0
 
 #define SHADOW_EXTRA_SIZE  4
@@ -502,12 +501,20 @@ render_fallback_node (GskGLRenderer       *self,
   cairo_fill (cr);
   cairo_restore (cr);
 
-#if HIGHLIGHT_FALLBACK
-  if (gsk_render_node_get_node_type (node) != GSK_CAIRO_NODE)
+#if G_ENABLE_DEBUG
+  if (GSK_RENDERER_DEBUG_CHECK (GSK_RENDERER (self), FALLBACK))
     {
       cairo_move_to (cr, 0, 0);
       cairo_rectangle (cr, 0, 0, node->bounds.size.width, node->bounds.size.height);
-      cairo_set_source_rgba (cr, 1, 0, 0, 1);
+      if (gsk_render_node_get_node_type (node) == GSK_CAIRO_NODE)
+        cairo_set_source_rgba (cr, 0.3, 0, 1, 0.25);
+      else
+        cairo_set_source_rgba (cr, 1, 0, 0, 0.25);
+      cairo_fill_preserve (cr);
+      if (gsk_render_node_get_node_type (node) == GSK_CAIRO_NODE)
+        cairo_set_source_rgba (cr, 0.3, 0, 1, 1);
+      else
+        cairo_set_source_rgba (cr, 1, 0, 0, 1);
       cairo_stroke (cr);
     }
 #endif