Switch to GXinvert in XTflash

* src/xterm.c (XTflash): Move to inverting the regions of the
display being flashed.  Suggested by Manuel Giraud
<manuel@ledu-giraud.fr>.

(cherry picked from commit d3e95fcae9078a0ea8fcb15a4aee417e6e546ee5)

diff --git a/src/xterm.c b/src/xterm.c
index c6cc4a9cae6ab4224b0742ec4fca8088c90a7f8d..44f0cc55fd7a692ba235eecff5fcaf612a350033 100644 (file)
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -11550,19 +11550,9 @@ XTflash (struct frame *f)
   int fd, rc;
 
   block_input ();
-
-  if (FRAME_X_VISUAL_INFO (f)->class == TrueColor)
-    {
-      values.function = GXxor;
-      values.foreground = (FRAME_FOREGROUND_PIXEL (f)
-                          ^ FRAME_BACKGROUND_PIXEL (f));
-
-      gc = XCreateGC (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
-                     GCFunction | GCForeground, &values);
-    }
-  else
-    gc = FRAME_X_OUTPUT (f)->normal_gc;
-
+  values.function = GXinvert;
+  gc = XCreateGC (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+                 GCFunction, &values);
 
   /* Get the height not including a menu bar widget.  */
   int height = FRAME_PIXEL_HEIGHT (f);
@@ -11649,8 +11639,7 @@ XTflash (struct frame *f)
                    flash_left, FRAME_INTERNAL_BORDER_WIDTH (f),
                    width, height - 2 * FRAME_INTERNAL_BORDER_WIDTH (f));
 
-  if (FRAME_X_VISUAL_INFO (f)->class == TrueColor)
-    XFreeGC (FRAME_X_DISPLAY (f), gc);
+  XFreeGC (FRAME_X_DISPLAY (f), gc);
   x_flush (f);
 
   unblock_input ();