[gimp] app: increase GimpDrawTool update rate

[Ell <ell src gnome org>]

commit 626e5b9b1491edc5695bc8c54d7631af5c47ab94
Author: Ell <ell_se yahoo com>
Date:   Tue Feb 4 17:46:58 2020 +0200

    app: increase GimpDrawTool update rate
    
    Now that painting is done in a separate thread, the display update
    rate has a far smaller impact on it.  Increate the GimpDrawTool
    update rate to 120 FPS.  This makes brush-outline motion much
    smoother.

 app/tools/gimpdrawtool.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/app/tools/gimpdrawtool.c b/app/tools/gimpdrawtool.c
index 70e4e6c2d4..129f9293d8 100644
--- a/app/tools/gimpdrawtool.c
+++ b/app/tools/gimpdrawtool.c
@@ -53,9 +53,10 @@
 #include "gimptoolcontrol.h"
 
 
-#define DRAW_TIMEOUT              4
-#define USE_TIMEOUT               1
-#define MINIMUM_DRAW_INTERVAL 50000 /* 50000 microseconds == 20 fps */
+#define USE_TIMEOUT
+#define DRAW_FPS              120
+#define DRAW_TIMEOUT          (1000 /* milliseconds */ / (2 * DRAW_FPS))
+#define MINIMUM_DRAW_INTERVAL (G_TIME_SPAN_SECOND / DRAW_FPS)
 
 
 static void          gimp_draw_tool_dispose       (GObject          *object);