From d3a98cf6cbc3bd0b9efc570f58e8812c03931c18 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Tue, 16 Oct 2018 10:08:48 +0200
Subject: Original 5.40

---
 hacks/glx/fps-gl.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 hacks/glx/fps-gl.c

(limited to 'hacks/glx/fps-gl.c')

diff --git a/hacks/glx/fps-gl.c b/hacks/glx/fps-gl.c
new file mode 100644
index 0000000..eb6b6de
--- /dev/null
+++ b/hacks/glx/fps-gl.c
@@ -0,0 +1,98 @@
+/* fps, Copyright (c) 2001-2015 Jamie Zawinski <jwz@jwz.org>
+ * Draw a frames-per-second display (Xlib and OpenGL).
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#ifdef HAVE_COCOA
+# include "jwxyz.h"
+#elif defined(HAVE_ANDROID)
+# include <GLES/gl.h>
+#else /* real Xlib */
+# include <GL/glx.h>
+# include <GL/glu.h>
+#endif /* !HAVE_COCOA */
+
+#ifdef HAVE_JWZGLES
+# include "jwzgles.h"
+#endif /* HAVE_JWZGLES */
+
+#include "xlockmoreI.h"
+#include "fpsI.h"
+#include "texfont.h"
+
+/* These are in xlock-gl.c */
+extern void clear_gl_error (void);
+extern void check_gl_error (const char *type);
+
+typedef struct {
+  texture_font_data *texfont;
+  int line_height;
+  Bool top_p;
+} gl_fps_data;
+
+
+static void
+xlockmore_gl_fps_init (fps_state *st)
+{
+  gl_fps_data *data = (gl_fps_data *) calloc (1, sizeof(*data));
+  int ascent, descent;
+  data->top_p = get_boolean_resource (st->dpy, "fpsTop", "FPSTop");
+  data->texfont = load_texture_font (st->dpy, "fpsFont");
+  texture_string_metrics (data->texfont, "M", 0, &ascent, &descent);
+  data->line_height = ascent + descent;
+  st->gl_fps_data = data;
+}
+
+
+/* Callback in xscreensaver_function_table, via xlockmore.c.
+ */
+void
+xlockmore_gl_compute_fps (Display *dpy, Window w, fps_state *fpst, 
+                          void *closure)
+{
+  ModeInfo *mi = (ModeInfo *) closure;
+  if (! mi->fpst)
+    {
+      mi->fpst = fpst;
+      xlockmore_gl_fps_init (fpst);
+    }
+
+  fps_compute (fpst, mi->polygon_count, mi->recursion_depth);
+}
+
+
+/* Called directly from GL programs (as `do_fps') before swapping buffers.
+ */
+void
+xlockmore_gl_draw_fps (ModeInfo *mi)
+{
+  fps_state *st = mi->fpst;
+  if (st)   /* might be too early */
+    {
+      gl_fps_data *data = (gl_fps_data *) st->gl_fps_data;
+      XWindowAttributes xgwa;
+      int lines = 1;
+      const char *s;
+
+      XGetWindowAttributes (st->dpy, st->window, &xgwa);
+      for (s = st->string; *s; s++) 
+        if (*s == '\n') lines++;
+
+      glColor3f (1, 1, 1);
+      print_texture_label (st->dpy, data->texfont,
+                           xgwa.width, xgwa.height,
+                           (data->top_p ? 1 : 2),
+                           st->string);
+    }
+}
-- 
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