VIDEO: Avoid disabling screen saver until a video display is active

README.md

@@ -64,6 +64,7 @@ All Simulator updates on Open SIMH will be present in this repository, and any c
 - Display current NOAUTOSIZE status in SHOW VERSION output.
 - Extend logical name support to include optional unique names for units as well as devices.
 - Add extended register sanity checks including duplicate name detection.  Fixed simulator devices with duplicate register names.
+- Simulators with video devices that may be enabled, no longer disable the screen saver until the video display is presented.
 
 #### Changes to the PDP-11 and VAX simulators
 
@@ -78,6 +79,7 @@ All Simulator updates on Open SIMH will be present in this repository, and any c
 - VHD disk formats are available on all disk types (including floppy or DECtape devices).
 - Properly size RY drives which also don't have DEC144
 - Properly name RQ extended units beyond the initial default units.
+- HELP CPU shows supported breakpoint types.
 
 ### Updates to the Unibus DUP & Qbus DPV device by Trevor Warwick
 

sim_video.c

@@ -509,6 +509,7 @@ main_argc = argc;
 main_argv = argv;
 
 SDL_SetHint (SDL_HINT_RENDER_DRIVER, "software");
+SDL_SetHint (SDL_HINT_VIDEO_ALLOW_SCREENSAVER, "1");
 
 status = SDL_Init (SDL_INIT_VIDEO);
 
@@ -1961,6 +1962,13 @@ if (!initialized) {
      *  and should be allocated with SDL_RegisterEvents()
      */
     eventtypes[SDL_USEREVENT] = "USEREVENT";
+
+    /** 
+     * For consistency with behavior since SDL 2.0.2, we disable 
+     * the screen saver when a video display is enabled.
+     */
+    if (SDL_IsScreenSaverEnabled () == SDL_TRUE)
+        SDL_DisableScreenSaver ();
     }
 
 sim_debug (SIM_VID_DBG_VIDEO|SIM_VID_DBG_KEY|SIM_VID_DBG_MOUSE, vptr0->vid_dev, "vid_thread() - Starting\n");