From http://www.jwz.org/xscreensaver/xscreensaver-5.38.tar.gz

[xscreensaver] / hacks / glx / erase-gl.c

diff --git a/hacks/glx/erase-gl.c b/hacks/glx/erase-gl.c
new file mode 100644 (file)
index 0000000..8515dd9
--- /dev/null
+++ b/hacks/glx/erase-gl.c
@@ -0,0 +1,38 @@
+/* Copyright (c) 2017 Dave Odell <dmo2118@gmail.com>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation.  No representations are made about the suitability of this
+ * software for any purpose.  It is provided "as is" without express or 
+ * implied warranty.
+ *
+ * xlockmore.c has references to erase_window, but it never calls these when
+ * running OpenGL hacks. Using this in place of regular utils/erase.c saves a
+ * tiny bit of code/disk space with a native X11 build, where everything is
+ * statically linked together.
+ *
+ * (Linux, amd64, CFLAGS='-O2 -g')
+ * Before: -rwxr-xr-x 1 david david 545848 Aug  9 20:42 hilbert
+ * After:  -rwxr-xr-x 1 david david 519344 Aug  9 20:41 hilbert
+ *
+ * (Linux, amd64, CFLAGS=-O2)
+ * Before: -rwxr-xr-x 1 david david 150168 Aug  9 20:40 hilbert
+ * After:  -rwxr-xr-x 1 david david 141256 Aug  9 20:39 hilbert
+ */
+
+#include "utils.h"
+#include "erase.h"
+
+void
+eraser_free (eraser_state *st)
+{
+}
+
+
+eraser_state *
+erase_window (Display *dpy, Window window, eraser_state *st)
+{
+  return st;
+}