http://ftp.x.org/contrib/applications/xscreensaver-3.09.tar.gz

[xscreensaver] / hacks / deluxe.c

diff --git a/hacks/deluxe.c b/hacks/deluxe.c
index aced3efc966f335bec2f363a95b713cb0e7c92ad..739536e7f741683d0cb2892827d96150936ea5e5 100644 (file)
--- a/hacks/deluxe.c
+++ b/hacks/deluxe.c
@@ -12,6 +12,10 @@
 #include <math.h>
 #include "screenhack.h"
 
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+# include "xdbe.h"
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
+
 #define countof(x) (sizeof(x)/sizeof(*(x)))
 #define ABS(x) ((x)<0?-(x):(x))
 
@@ -198,6 +202,9 @@ char *defaults [] = {
   "*speed:             15",
   "*ncolors:           20",
   "*doubleBuffer:      True",
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+  "*useDBE:            True",
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
   0
 };
 
@@ -207,6 +214,8 @@ XrmOptionDescRec options [] = {
   { "-count",          ".count",       XrmoptionSepArg, 0 },
   { "-ncolors",                ".ncolors",     XrmoptionSepArg, 0 },
   { "-speed",          ".speed",       XrmoptionSepArg, 0 },
+  { "-db",             ".doubleBuffer", XrmoptionNoArg,  "True" },
+  { "-no-db",          ".doubleBuffer", XrmoptionNoArg,  "False" },
   { 0, 0, 0, 0 }
 };
 
@@ -224,16 +233,39 @@ screenhack (Display *dpy, Window window)
   struct throbber **throbbers;
   XWindowAttributes xgwa;
   Pixmap b=0, ba=0, bb=0;      /* double-buffer to reduce flicker */
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+  XdbeBackBuffer backb = 0;
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
 
   XGetWindowAttributes (dpy, window, &xgwa);
-  make_random_colormap (dpy, xgwa.visual, xgwa.colormap,
-                        colors, &ncolors, True, True, 0, True);
+
+  if (get_boolean_resource("mono", "Boolean"))
+    {
+    MONO:
+      ncolors = 1;
+      colors[0].pixel = get_pixel_resource("foreground", "Foreground",
+                                           dpy, xgwa.colormap);
+    }
+  else
+    {
+      make_random_colormap (dpy, xgwa.visual, xgwa.colormap,
+                            colors, &ncolors, True, True, 0, True);
+      if (ncolors < 2)
+        goto MONO;
+    }
 
   if (dbuf)
     {
-      ba = XCreatePixmap (dpy, window, xgwa.width, xgwa.height, xgwa.depth);
-      bb = XCreatePixmap (dpy, window, xgwa.width, xgwa.height, xgwa.depth);
-      b = ba;
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+      b = backb = xdbe_get_backbuffer (dpy, window, XdbeUndefined);
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
+
+      if (!b)
+        {
+          ba = XCreatePixmap (dpy, window, xgwa.width, xgwa.height,xgwa.depth);
+          bb = XCreatePixmap (dpy, window, xgwa.width, xgwa.height,xgwa.depth);
+          b = ba;
+        }
     }
   else
     {
@@ -245,26 +277,32 @@ screenhack (Display *dpy, Window window)
     throbbers[i] = make_throbber (dpy, b, xgwa.width, xgwa.height,
                                   colors[random() % ncolors].pixel);
 
-  if (dbuf)
-    {
-      gcv.foreground = get_pixel_resource ("background", "Background",
-                                           dpy, xgwa.colormap);
-      erase_gc = XCreateGC (dpy, b, GCForeground, &gcv);
-      XFillRectangle (dpy, ba, erase_gc, 0, 0, xgwa.width, xgwa.height);
-      XFillRectangle (dpy, bb, erase_gc, 0, 0, xgwa.width, xgwa.height);
-    }
+  gcv.foreground = get_pixel_resource ("background", "Background",
+                                       dpy, xgwa.colormap);
+  erase_gc = XCreateGC (dpy, b, GCForeground, &gcv);
+
+  if (ba) XFillRectangle (dpy, ba, erase_gc, 0, 0, xgwa.width, xgwa.height);
+  if (bb) XFillRectangle (dpy, bb, erase_gc, 0, 0, xgwa.width, xgwa.height);
 
   while (1)
     {
-      if (dbuf)
-        XFillRectangle (dpy, b, erase_gc, 0, 0, xgwa.width, xgwa.height);
-      else
-        XClearWindow (dpy, b);
+      XFillRectangle (dpy, b, erase_gc, 0, 0, xgwa.width, xgwa.height);
 
       for (i = 0; i < count; i++)
         if (throb (dpy, b, throbbers[i]) < 0)
           throbbers[i] = make_throbber (dpy, b, xgwa.width, xgwa.height,
                                         colors[random() % ncolors].pixel);
+
+#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
+      if (backb)
+        {
+          XdbeSwapInfo info[1];
+          info[0].swap_window = window;
+          info[0].swap_action = XdbeUndefined;
+          XdbeSwapBuffers (dpy, info, 1);
+        }
+      else
+#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
       if (dbuf)
         {
           XCopyArea (dpy, b, window, erase_gc, 0, 0,