Mac OS: made function Fl_Graphics_Driver::clip_box() more accurate for retina displays

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10576 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 4 insertions, 4 deletions

diff --git a/src/fl_rect.cxx b/src/fl_rect.cxx
index f7a49cb7c..ff217db34 100644
--- a/src/fl_rect.cxx
+++ b/src/fl_rect.cxx
@@ -718,10 +718,10 @@ int Fl_Graphics_Driver::clip_box(int x, int y, int w, int h, int& X, int& Y, int
       else u = CGRectUnion(u, test);
     }
   }
-  X = int(u.origin.x);
-  Y = int(u.origin.y);
-  W = int(u.size.width + 1);
-  H = int(u.size.height + 1);
+  X = int(u.origin.x + 0.5); // reverse offset introduced by fl_cgrectmake_cocoa()
+  Y = int(u.origin.y + 0.5);
+  W = int(u.size.width + 0.5); // round to nearest integer
+  H = int(u.size.height + 0.5);
   if(CGRectIsEmpty(u)) W = H = 0;
   return ! CGRectEqualToRect(arg, u);
 #else