1 files changed, 93 insertions, 0 deletions
diff --git a/x11vnc/pm.c b/x11vnc/pm.c
new file mode 100644
index 0000000..8b3eab5
--- /dev/null
+++ b/x11vnc/pm.c
@@ -0,0 +1,93 @@
+/* -- pm.c -- */
+#include "x11vnc.h"
+#include "cleanup.h"
+
+void check_pm(void);
+static void check_fbpm(void);
+
+#if LIBVNCSERVER_HAVE_FBPM
+#include <X11/Xmd.h>
+#include <X11/extensions/fbpm.h>
+#endif
+
+void check_pm(void) {
+	check_fbpm();
+	/* someday dpms activities? */
+}
+
+static void check_fbpm(void) {
+	static int init_fbpm = 0;
+#if LIBVNCSERVER_HAVE_FBPM
+	static int fbpm_capable = 0;
+	static time_t last_fbpm = 0;
+	int db = 1;
+
+	CARD16 level;
+	BOOL enabled;
+
+	if (raw_fb && ! dpy) return;	/* raw_fb hack */
+
+	if (! init_fbpm) {
+		if (FBPMCapable(dpy)) {
+			fbpm_capable = 1;
+			rfbLog("X display is capable of FBPM.\n");
+			if (watch_fbpm) {
+				rfbLog("Preventing low-power FBPM modes when"
+				    " VNC clients are connected.\n");
+			}
+		} else {
+			rfbLog("X display is not capable of FBPM.\n");
+			fbpm_capable = 0;
+		}
+		init_fbpm = 1;
+	}
+
+	if (! watch_fbpm) {
+		return;
+	}
+	if (! fbpm_capable) {
+		return;
+	}
+	if (! client_count) {
+		return;
+	}
+	if (time(0) < last_fbpm + 5) {
+		return;
+	}
+	last_fbpm = time(0);
+
+	if (FBPMInfo(dpy, &level, &enabled)) {
+		if (db) fprintf(stderr, "FBPMInfo level: %d enabled: %d\n", level, enabled);
+
+		if (enabled && level != FBPMModeOn) {
+			char *from = "unknown-fbpm-state";
+			XErrorHandler old_handler = XSetErrorHandler(trap_xerror);
+			trapped_xerror = 0;
+
+			if (level == FBPMModeStandby) {
+				from = "FBPMModeStandby";
+			} else if (level == FBPMModeSuspend) {
+				from = "FBPMModeSuspend";
+			} else if (level == FBPMModeOff) {
+				from = "FBPMModeOff";
+			}
+
+			rfbLog("switching FBPM state from %s to FBPMModeOn\n", from);
+			
+			FBPMForceLevel(dpy, FBPMModeOn);
+		
+			XSetErrorHandler(old_handler);
+			trapped_xerror = 0;
+		}
+	} else {
+		if (db) fprintf(stderr, "FBPMInfo failed.\n");
+	}
+#else
+	if (raw_fb && ! dpy) return;	/* raw_fb hack */
+	if (! init_fbpm) {
+		rfbLog("X FBPM extension not supported.\n");
+		init_fbpm = 1;
+	}
+#endif
+}
+