[gimp] app: use gimp_cairo_rounded_rectangle() in GimpOverlayFrame

[N/A <ell src gnome org>]

commit e4c79cb2d60da824f7c11305df1b73e32ca36dd2
Author: Ell <ell_se yahoo com>
Date:   Wed Mar 7 09:21:08 2018 -0500

    app: use gimp_cairo_rounded_rectangle() in GimpOverlayFrame
    
    ... instead of drawing it the hard way.

 app/core/gimp-cairo.c          |    7 ++++++
 app/widgets/gimpoverlayframe.c |   47 ++++++----------------------------------
 2 files changed, 14 insertions(+), 40 deletions(-)
---
diff --git a/app/core/gimp-cairo.c b/app/core/gimp-cairo.c
index 9814235..2cfb3ab 100644
--- a/app/core/gimp-cairo.c
+++ b/app/core/gimp-cairo.c
@@ -151,6 +151,13 @@ gimp_cairo_rounded_rectangle (cairo_t *cr,
 
   corner_radius = CLAMP (corner_radius, 0.0, MIN (width, height) / 2.0);
 
+  if (corner_radius == 0.0)
+    {
+      cairo_rectangle (cr, x, y, width, height);
+
+      return;
+    }
+
   cairo_new_sub_path (cr);
 
   cairo_arc     (cr,
diff --git a/app/widgets/gimpoverlayframe.c b/app/widgets/gimpoverlayframe.c
index 039b2b4..ae36f70 100644
--- a/app/widgets/gimpoverlayframe.c
+++ b/app/widgets/gimpoverlayframe.c
@@ -26,6 +26,8 @@
 
 #include "widgets-types.h"
 
+#include "core/gimp-cairo.h"
+
 #include "gimpoverlayframe.h"
 #include "gimpwidgets-utils.h"
 
@@ -134,47 +136,12 @@ gimp_overlay_frame_expose (GtkWidget      *widget,
   gtk_widget_get_allocation (widget, &allocation);
   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 
-  if (rgba && border_width > 0)
+  if (rgba)
     {
-#define DEG_TO_RAD(deg) ((deg) * (G_PI / 180.0))
-
-      cairo_arc (cr,
-                 border_width,
-                 border_width,
-                 border_width,
-                 DEG_TO_RAD (180),
-                 DEG_TO_RAD (270));
-      cairo_line_to (cr,
-                     allocation.width - border_width,
-                     0);
-
-      cairo_arc (cr,
-                 allocation.width - border_width,
-                 border_width,
-                 border_width,
-                 DEG_TO_RAD (270),
-                 DEG_TO_RAD (0));
-      cairo_line_to (cr,
-                     allocation.width,
-                     allocation.height - border_width);
-
-      cairo_arc (cr,
-                 allocation.width  - border_width,
-                 allocation.height - border_width,
-                 border_width,
-                 DEG_TO_RAD (0),
-                 DEG_TO_RAD (90));
-      cairo_line_to (cr,
-                     border_width,
-                     allocation.height);
-
-      cairo_arc (cr,
-                 border_width,
-                 allocation.height - border_width,
-                 border_width,
-                 DEG_TO_RAD (90),
-                 DEG_TO_RAD (180));
-      cairo_close_path (cr);
+      gimp_cairo_rounded_rectangle (cr,
+                                    0.0,              0.0,
+                                    allocation.width, allocation.height,
+                                    border_width);
     }
   else
     {