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root/cebix/BasiliskII/src/Unix/video_x.cpp

Comparing BasiliskII/src/Unix/video_x.cpp (file contents):
Revision 1.55 by cebix, 2001-07-06T22:37:23Z vs.
Revision 1.60 by cebix, 2001-07-11T19:26:14Z

#	Line 80 | Line 80 | enum {
80		// Constants
81		const char KEYCODE_FILE_NAME[] = DATADIR "/keycodes";
82
83	<	static const int win_eventmask = KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask | ExposureMask | StructureNotifyMask;
83	>	static const int win_eventmask = KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask | EnterWindowMask | ExposureMask | StructureNotifyMask;
84		static const int dga_eventmask = KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask;
85
86
#	Line 93 | Line 93 | static int display_type = DISPLAY_WINDOW
93		static bool local_X11;                                                          // Flag: X server running on local machine?
94		static uint8 *the_buffer = NULL;                                        // Mac frame buffer (where MacOS draws into)
95		static uint8 *the_buffer_copy = NULL;                           // Copy of Mac frame buffer (for refreshed modes)
96	+	static uint32 the_buffer_size;                                          // Size of allocated the_buffer
97
98		static bool redraw_thread_active = false;                       // Flag: Redraw thread installed
99		#ifdef HAVE_PTHREADS
#	Line 183 | Line 184 | static void (*video_refresh)(void);
184
185		// Prototypes
186		static void *redraw_func(void *arg);
186	–	static int event2keycode(XKeyEvent &ev);
187
188		// From main_unix.cpp
189		extern char *x_display_name;
#	Line 212 | Line 212 | static bool find_visual_for_depth(video_
212		// Calculate minimum and maximum supported X depth
213		int min_depth = 1, max_depth = 32;
214		switch (depth) {
215	<	case VDEPTH_1BIT:       // 1-bit works always
216	<	min_depth = 1;
217	<	max_depth = 32;
215	>	case VDEPTH_1BIT:       // 1-bit works always and uses default visual
216	>	min_depth = max_depth = DefaultDepth(x_display, screen);
217		break;
218		#ifdef ENABLE_VOSF
219		case VDEPTH_2BIT:
#	Line 293 | Line 292 | static bool find_visual_for_depth(video_
292		case DirectColor: D(bug("DirectColor\n")); break;
293		}
294		#endif
295	+	return true;
296		}
297
298		// Add mode to list of supported modes
#	Line 428 | Line 428 | public:
428		virtual void toggle_mouse_grab(void) {}
429		virtual void mouse_moved(int x, int y) { ADBMouseMoved(x, y); }
430
431	+	void disable_mouse_accel(void);
432	+	void restore_mouse_accel(void);
433	+
434		virtual void grab_mouse(void) {}
435		virtual void ungrab_mouse(void) {}
436
437		public:
438		bool init_ok;   // Initialization succeeded (we can't use exceptions because of -fomit-frame-pointer)
439		Window w;               // The window we draw into
440	+
441	+	int orig_accel_numer, orig_accel_denom, orig_threshold; // Original mouse acceleration
442		};
443
444		class driver_window;
#	Line 477 | Line 482 | driver_base::driver_base()
482		{
483		the_buffer = NULL;
484		the_buffer_copy = NULL;
485	+	XGetPointerControl(x_display, &orig_accel_numer, &orig_accel_denom, &orig_threshold);
486		}
487
488		driver_base::~driver_base()
489		{
490		ungrab_mouse();
491	+	restore_mouse_accel();
492
493		if (w) {
494		XUnmapWindow(x_display, w);
#	Line 509 | Line 516 | driver_base::~driver_base()
516		free(the_host_buffer);
517		the_host_buffer = NULL;
518		}
519	<	if (the_buffer != (uint8 *)VM_MAP_FAILED) {
520	<	vm_release(the_buffer, the_buffer_size);
519	>	if (the_buffer) {
520	>	free(the_buffer);
521		the_buffer = NULL;
522		}
523	<	if (the_buffer_copy != (uint8 *)VM_MAP_FAILED) {
524	<	vm_release(the_buffer_copy, the_buffer_size);
523	>	if (the_buffer_copy) {
524	>	free(the_buffer_copy);
525		the_buffer_copy = NULL;
526		}
527		}
#	Line 524 | Line 531 | driver_base::~driver_base()
531		// Palette has changed
532		void driver_base::update_palette(void)
533		{
534	<	if (cmap[0] && cmap[1]) {
534	>	if (color_class == PseudoColor || color_class == DirectColor) {
535		int num = vis->map_entries;
536		if (!IsDirectMode(VideoMonitor.mode) && color_class == DirectColor)
537		return; // Indexed mode on true color screen, don't set CLUT
#	Line 534 | Line 541 | void driver_base::update_palette(void)
541		XSync(x_display, false);
542		}
543
544	+	// Disable mouse acceleration
545	+	void driver_base::disable_mouse_accel(void)
546	+	{
547	+	XChangePointerControl(x_display, True, False, 1, 1, 0);
548	+	}
549	+
550	+	// Restore mouse acceleration to original value
551	+	void driver_base::restore_mouse_accel(void)
552	+	{
553	+	XChangePointerControl(x_display, True, True, orig_accel_numer, orig_accel_denom, orig_threshold);
554	+	}
555	+
556
557		/*
558		*  Windowed display driver
#	Line 541 | Line 560 | void driver_base::update_palette(void)
560
561		// Open display
562		driver_window::driver_window(const video_mode &mode)
563	<	: gc(0), img(NULL), have_shm(false), mouse_grabbed(false), mac_cursor(0)
563	>	: gc(0), img(NULL), have_shm(false), mac_cursor(0), mouse_grabbed(false)
564		{
565		int width = mode.x, height = mode.y;
566		int aligned_width = (width + 15) & ~15;
#	Line 550 | Line 569 | driver_window::driver_window(const video
569		// Set absolute mouse mode
570		ADBSetRelMouseMode(mouse_grabbed);
571
572	<	// Create window
572	>	// Create window (setting backround_pixel, border_pixel and colormap is
573	>	// mandatory when using a non-default visual; in 1-bit mode we use the
574	>	// default visual, so we can also use the default colormap)
575		XSetWindowAttributes wattr;
576		wattr.event_mask = eventmask = win_eventmask;
577	<	wattr.background_pixel = black_pixel;
578	<	wattr.colormap = (mode.depth == VDEPTH_1BIT && color_class == PseudoColor ? DefaultColormap(x_display, screen) : cmap[0]);
577	>	wattr.background_pixel = (vis == DefaultVisual(x_display, screen) ? black_pixel : 0);
578	>	wattr.border_pixel = 0;
579	>	wattr.colormap = (mode.depth == VDEPTH_1BIT ? DefaultColormap(x_display, screen) : cmap[0]);
580		w = XCreateWindow(x_display, rootwin, 0, 0, width, height, 0, xdepth,
581	<	InputOutput, vis, CWEventMask | CWBackPixel | (color_class == PseudoColor || color_class == DirectColor ? CWColormap : 0), &wattr);
581	>	InputOutput, vis, CWEventMask | CWBackPixel | CWBorderPixel | CWColormap, &wattr);
582
583		// Set window name/class
584		set_window_name(w, STR_WINDOW_TITLE);
#	Line 629 | Line 651 | driver_window::driver_window(const video
651		}
652
653		#ifdef ENABLE_VOSF
654	+	use_vosf = true;
655		// Allocate memory for frame buffer (SIZE is extended to page-boundary)
656		the_host_buffer = the_buffer_copy;
657		the_buffer_size = page_extend((aligned_height + 2) * img->bytes_per_line);
#	Line 682 | Line 705 | driver_window::~driver_window()
705		the_buffer_copy = NULL; // don't free() in driver_base dtor
706		#endif
707		}
708	+	#ifdef ENABLE_VOSF
709	+	if (use_vosf) {
710	+	// don't free() memory mapped buffers in driver_base dtor
711	+	if (the_buffer != VM_MAP_FAILED) {
712	+	vm_release(the_buffer, the_buffer_size);
713	+	the_buffer = NULL;
714	+	}
715	+	if (the_buffer_copy != VM_MAP_FAILED) {
716	+	vm_release(the_buffer_copy, the_buffer_size);
717	+	the_buffer_copy = NULL;
718	+	}
719	+	}
720	+	#endif
721		if (img)
722		XDestroyImage(img);
723		if (have_shm) {
#	Line 713 | Line 749 | void driver_window::grab_mouse(void)
749		Delay_usec(100000);
750		}
751		if (result == GrabSuccess) {
716	–	ADBSetRelMouseMode(mouse_grabbed = true);
752		XStoreName(x_display, w, GetString(STR_WINDOW_TITLE_GRABBED));
753	<	XSync(x_display, false);
753	>	ADBSetRelMouseMode(mouse_grabbed = true);
754	>	disable_mouse_accel();
755		}
756		}
757
#	Line 726 | Line 762 | void driver_window::ungrab_mouse(void)
762		XUngrabPointer(x_display, CurrentTime);
763		XStoreName(x_display, w, GetString(STR_WINDOW_TITLE));
764		ADBSetRelMouseMode(mouse_grabbed = false);
765	+	restore_mouse_accel();
766		}
767		}
768
#	Line 821 | Line 858 | void driver_dga::suspend(void)
858		#endif
859		XUngrabPointer(x_display, CurrentTime);
860		XUngrabKeyboard(x_display, CurrentTime);
861	+	restore_mouse_accel();
862		XUnmapWindow(x_display, w);
863		wait_unmapped(w);
864
#	Line 850 | Line 888 | void driver_dga::resume(void)
888		XWarpPointer(x_display, None, rootwin, 0, 0, 0, 0, 0, 0);
889		XGrabKeyboard(x_display, rootwin, True, GrabModeAsync, GrabModeAsync, CurrentTime);
890		XGrabPointer(x_display, rootwin, True, PointerMotionMask | ButtonPressMask | ButtonReleaseMask, GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
891	+	disable_mouse_accel();
892		#ifdef ENABLE_XF86_DGA
893		XF86DGADirectVideo(x_display, screen, XF86DGADirectGraphics | XF86DGADirectKeyb | XF86DGADirectMouse);
894		XF86DGASetViewPort(x_display, screen, 0, 0);
#	Line 996 | Line 1035 | driver_fbdev::driver_fbdev(const video_m
1035		XGrabPointer(x_display, w, True,
1036		PointerMotionMask | ButtonPressMask | ButtonReleaseMask,
1037		GrabModeAsync, GrabModeAsync, w, None, CurrentTime);
1038	+	disable_mouse_accel();
1039
1040		// Calculate bytes per row
1041		int bytes_per_row = TrivialBytesPerRow(mode.x, mode.depth);
1042
1043		// Map frame buffer
1044	<	if ((the_buffer = (uint8 *) mmap(NULL, height * bytes_per_row, PROT_READ | PROT_WRITE, MAP_PRIVATE, fbdev_fd, fb_offset)) == MAP_FAILED) {
1045	<	if ((the_buffer = (uint8 *) mmap(NULL, height * bytes_per_row, PROT_READ | PROT_WRITE, MAP_SHARED, fbdev_fd, fb_offset)) == MAP_FAILED) {
1044	>	the_buffer_size = height * bytes_per_row;
1045	>	if ((the_buffer = (uint8 *) mmap(NULL, the_buffer_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fbdev_fd, fb_offset)) == MAP_FAILED) {
1046	>	if ((the_buffer = (uint8 *) mmap(NULL, the_buffer_size, PROT_READ | PROT_WRITE, MAP_SHARED, fbdev_fd, fb_offset)) == MAP_FAILED) {
1047		char str[256];
1048		sprintf(str, GetString(STR_FBDEV_MMAP_ERR), strerror(errno));
1049		ErrorAlert(str);
#	Line 1041 | Line 1082 | driver_fbdev::driver_fbdev(const video_m
1082		// Close display
1083		driver_fbdev::~driver_fbdev()
1084		{
1085	+	if (!use_vosf) {
1086	+	if (the_buffer != MAP_FAILED) {
1087	+	// don't free() the screen buffer in driver_base dtor
1088	+	munmap(the_buffer, the_buffer_size);
1089	+	the_buffer = NULL;
1090	+	}
1091	+	}
1092	+	#ifdef ENABLE_VOSF
1093	+	else {
1094	+	if (the_host_buffer != MAP_FAILED) {
1095	+	// don't free() the screen buffer in driver_base dtor
1096	+	munmap(the_host_buffer, the_buffer_size);
1097	+	the_host_buffer = NULL;
1098	+	}
1099	+	if (the_buffer_copy != VM_MAP_FAILED) {
1100	+	vm_release(the_buffer_copy, the_buffer_size);
1101	+	the_buffer_copy = NULL;
1102	+	}
1103	+	if (the_buffer != VM_MAP_FAILED) {
1104	+	vm_release(the_buffer, the_buffer_size);
1105	+	the_buffer = NULL;
1106	+	}
1107	+	}
1108	+	#endif
1109		}
1110		#endif
1111
#	Line 1110 | Line 1175 | driver_xf86dga::driver_xf86dga(const vid
1175		XWarpPointer(x_display, None, rootwin, 0, 0, 0, 0, 0, 0);
1176		XGrabKeyboard(x_display, rootwin, True, GrabModeAsync, GrabModeAsync, CurrentTime);
1177		XGrabPointer(x_display, rootwin, True, PointerMotionMask | ButtonPressMask | ButtonReleaseMask, GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
1178	+	disable_mouse_accel();
1179
1180		int v_width, v_bank, v_size;
1181		XF86DGAGetVideo(x_display, screen, (char **)&the_buffer, &v_width, &v_bank, &v_size);
#	Line 1126 | Line 1192 | driver_xf86dga::driver_xf86dga(const vid
1192
1193		// Init blitting routines
1194		int bytes_per_row = TrivialBytesPerRow((v_width + 7) & ~7, mode.depth);
1195	<	#ifdef VIDEO_VOSF
1195	>	#if VIDEO_VOSF
1196		#if REAL_ADDRESSING || DIRECT_ADDRESSING
1197		// Screen_blitter_init() returns TRUE if VOSF is mandatory
1198		// i.e. the framebuffer update function is not Blit_Copy_Raw
#	Line 1157 | Line 1223 | driver_xf86dga::driver_xf86dga(const vid
1223		driver_xf86dga::~driver_xf86dga()
1224		{
1225		XF86DGADirectVideo(x_display, screen, 0);
1226	+	if (!use_vosf) {
1227	+	// don't free() the screen buffer in driver_base dtor
1228	+	the_buffer = NULL;
1229	+	}
1230	+	#ifdef ENABLE_VOSF
1231	+	else {
1232	+	// don't free() the screen buffer in driver_base dtor
1233	+	the_host_buffer = NULL;
1234	+
1235	+	if (the_buffer_copy != VM_MAP_FAILED) {
1236	+	vm_release(the_buffer_copy, the_buffer_size);
1237	+	the_buffer_copy = NULL;
1238	+	}
1239	+	if (the_buffer != VM_MAP_FAILED) {
1240	+	vm_release(the_buffer, the_buffer_size);
1241	+	the_buffer = NULL;
1242	+	}
1243	+	}
1244	+	#endif
1245		#ifdef ENABLE_XF86_VIDMODE
1246		if (has_vidmode)
1247		XF86VidModeSwitchToMode(x_display, screen, x_video_modes[0]);
#	Line 1264 | Line 1349 | static bool video_open(const video_mode
1349		if (color_class == PseudoColor || color_class == DirectColor) {
1350		cmap[0] = XCreateColormap(x_display, rootwin, vis, AllocAll);
1351		cmap[1] = XCreateColormap(x_display, rootwin, vis, AllocAll);
1352	+	} else {
1353	+	cmap[0] = XCreateColormap(x_display, rootwin, vis, AllocNone);
1354	+	cmap[1] = XCreateColormap(x_display, rootwin, vis, AllocNone);
1355		}
1356
1357		// Find pixel format of direct modes
#	Line 1285 | Line 1373 | static bool video_open(const video_mode
1373		--bloss;
1374		}
1375
1376	<	// Preset palette pixel values for gamma table
1376	>	// Preset palette pixel values for CLUT or gamma table
1377		if (color_class == DirectColor) {
1378		int num = vis->map_entries;
1379		for (int i=0; i<num; i++) {
1380		int c = (i * 256) / num;
1381		palette[i].pixel = map_rgb(c, c, c);
1382	+	palette[i].flags = DoRed | DoGreen | DoBlue;
1383	+	}
1384	+	} else if (color_class == PseudoColor) {
1385	+	for (int i=0; i<256; i++) {
1386	+	palette[i].pixel = i;
1387	+	palette[i].flags = DoRed | DoGreen | DoBlue;
1388		}
1389		}
1390
#	Line 1301 | Line 1395 | static bool video_open(const video_mode
1395		palette[i].red = c * 0x0101;
1396		palette[i].green = c * 0x0101;
1397		palette[i].blue = c * 0x0101;
1304	–	if (color_class == PseudoColor)
1305	–	palette[i].pixel = i;
1306	–	palette[i].flags = DoRed | DoGreen | DoBlue;
1398		}
1399	<	if (cmap[0] && cmap[1]) {
1399	>	if (color_class == PseudoColor || color_class == DirectColor) {
1400		XStoreColors(x_display, cmap[0], palette, num);
1401		XStoreColors(x_display, cmap[1], palette, num);
1402		}
1403
1404		#ifdef ENABLE_VOSF
1405		// Load gray ramp to 8->16/32 expand map
1406	<	if (!IsDirectMode(mode) && (color_class == TrueColor || color_class == DirectColor))
1406	>	if (!IsDirectMode(mode) && xdepth > 8)
1407		for (int i=0; i<256; i++)
1408		ExpandMap[i] = map_rgb(i, i, i);
1409		#endif
#	Line 1343 | Line 1434 | static bool video_open(const video_mode
1434
1435		#ifdef ENABLE_VOSF
1436		if (use_vosf) {
1437	<	// Initialize the mainBuffer structure
1438	<	if (!video_init_buffer()) {
1437	>	// Initialize the VOSF system
1438	>	if (!video_vosf_init()) {
1439		ErrorAlert(STR_VOSF_INIT_ERR);
1440		return false;
1441		}
1351	–
1352	–	// Initialize the handler for SIGSEGV
1353	–	if (!sigsegv_install_handler(screen_fault_handler)) {
1354	–	ErrorAlert("Could not initialize Video on SEGV signals");
1355	–	return false;
1356	–	}
1442		}
1443		#endif
1444
#	Line 1569 | Line 1654 | static void video_close(void)
1654		XSync(x_display, false);
1655
1656		#ifdef ENABLE_VOSF
1572	–	// Deinitialize VOSF
1657		if (use_vosf) {
1658	<	if (mainBuffer.pageInfo) {
1659	<	free(mainBuffer.pageInfo);
1576	<	mainBuffer.pageInfo = NULL;
1577	<	}
1578	<	if (mainBuffer.dirtyPages) {
1579	<	free(mainBuffer.dirtyPages);
1580	<	mainBuffer.dirtyPages = NULL;
1581	<	}
1658	>	// Deinitialize VOSF
1659	>	video_vosf_exit();
1660		}
1661		#endif
1662
#	Line 1676 | Line 1754 | void video_set_palette(uint8 *pal, int n
1754		p->red = pal[c*3 + 0] * 0x0101;
1755		p->green = pal[c*3 + 1] * 0x0101;
1756		p->blue = pal[c*3 + 2] * 0x0101;
1679	–	if (color_class == PseudoColor)
1680	–	p->pixel = i;
1681	–	p->flags = DoRed | DoGreen | DoBlue;
1757		p++;
1758		}
1759
1760		#ifdef ENABLE_VOSF
1761		// Recalculate pixel color expansion map
1762	<	if (!IsDirectMode(VideoMonitor.mode) && (color_class == TrueColor || color_class == DirectColor)) {
1762	>	if (!IsDirectMode(VideoMonitor.mode) && xdepth > 8) {
1763		for (int i=0; i<256; i++) {
1764		int c = i & (num_in-1); // If there are less than 256 colors, we repeat the first entries (this makes color expansion easier)
1765		ExpandMap[i] = map_rgb(pal[c*3+0], pal[c*3+1], pal[c*3+2]);
#	Line 1897 | Line 1972 | static void handle_events(void)
1972		XNextEvent(x_display, &event);
1973
1974		switch (event.type) {
1975	+
1976		// Mouse button
1977		case ButtonPress: {
1978		unsigned int button = event.xbutton.button;
#	Line 1929 | Line 2005 | static void handle_events(void)
2005		drv->mouse_moved(event.xmotion.x, event.xmotion.y);
2006		break;
2007
2008	+	// Mouse entered window
2009	+	case EnterNotify:
2010	+	if (event.xcrossing.mode != NotifyGrab && event.xcrossing.mode != NotifyUngrab)
2011	+	drv->mouse_moved(event.xmotion.x, event.xmotion.y);
2012	+	break;
2013	+
2014		// Keyboard
2015		case KeyPress: {
2016		int code = -1;
#	Line 2106 | Line 2188 | static void update_display_dynamic(int t
2188		static void update_display_static(driver_window *drv)
2189		{
2190		// Incremental update code
2191	<	int wide = 0, high = 0, x1, x2, y1, y2, i, j;
2191	>	unsigned wide = 0, high = 0, x1, x2, y1, y2, i, j;
2192		int bytes_per_row = VideoMonitor.mode.bytes_per_row;
2193		int bytes_per_pixel = VideoMonitor.mode.bytes_per_row / VideoMonitor.mode.x;
2194		uint8 *p, *p2;
#	Line 2265 | Line 2347 | static void video_refresh_dga(void)
2347		{
2348		// Quit DGA mode if requested
2349		possibly_quit_dga_mode();
2268	–
2269	–	// Handle X events
2270	–	handle_events();
2271	–
2272	–	// Handle palette changes
2273	–	handle_palette_changes();
2350		}
2351
2352		#ifdef ENABLE_VOSF
#	Line 2280 | Line 2356 | static void video_refresh_dga_vosf(void)
2356		// Quit DGA mode if requested
2357		possibly_quit_dga_mode();
2358
2283	–	// Handle X events
2284	–	handle_events();
2285	–
2286	–	// Handle palette changes
2287	–	handle_palette_changes();
2288	–
2359		// Update display (VOSF variant)
2360		static int tick_counter = 0;
2361		if (++tick_counter >= frame_skip) {
#	Line 2304 | Line 2374 | static void video_refresh_window_vosf(vo
2374		// Ungrab mouse if requested
2375		possibly_ungrab_mouse();
2376
2307	–	// Handle X events
2308	–	handle_events();
2309	–
2310	–	// Handle palette changes
2311	–	handle_palette_changes();
2312	–
2377		// Update display (VOSF variant)
2378		static int tick_counter = 0;
2379		if (++tick_counter >= frame_skip) {
#	Line 2329 | Line 2393 | static void video_refresh_window_static(
2393		// Ungrab mouse if requested
2394		possibly_ungrab_mouse();
2395
2332	–	// Handle X events
2333	–	handle_events();
2334	–
2335	–	// Handle_palette changes
2336	–	handle_palette_changes();
2337	–
2396		// Update display (static variant)
2397		static int tick_counter = 0;
2398		if (++tick_counter >= frame_skip) {
#	Line 2348 | Line 2406 | static void video_refresh_window_dynamic
2406		// Ungrab mouse if requested
2407		possibly_ungrab_mouse();
2408
2351	–	// Handle X events
2352	–	handle_events();
2353	–
2354	–	// Handle_palette changes
2355	–	handle_palette_changes();
2356	–
2409		// Update display (dynamic variant)
2410		static int tick_counter = 0;
2411		tick_counter++;
#	Line 2389 | Line 2441 | static void VideoRefreshInit(void)
2441		}
2442		}
2443
2444	+	// This function is called on non-threaded platforms from a timer interrupt
2445		void VideoRefresh(void)
2446		{
2447		// We need to check redraw_thread_active to inhibit refreshed during
2448		// mode changes on non-threaded platforms
2449	<	if (redraw_thread_active)
2450	<	video_refresh();
2449	>	if (!redraw_thread_active)
2450	>	return;
2451	>
2452	>	// Handle X events
2453	>	handle_events();
2454	>
2455	>	// Handle palette changes
2456	>	handle_palette_changes();
2457	>
2458	>	// Update display
2459	>	video_refresh();
2460		}
2461
2462	+	const int VIDEO_REFRESH_HZ = 60;
2463	+	const int VIDEO_REFRESH_DELAY = 1000000 / VIDEO_REFRESH_HZ;
2464	+
2465		#ifdef HAVE_PTHREADS
2466		static void *redraw_func(void *arg)
2467		{
2468	+	int fd = ConnectionNumber(x_display);
2469	+
2470		uint64 start = GetTicks_usec();
2471		int64 ticks = 0;
2472	<	uint64 next = GetTicks_usec();
2472	>	uint64 next = GetTicks_usec() + VIDEO_REFRESH_DELAY;
2473	>
2474		while (!redraw_thread_cancel) {
2475	<	video_refresh();
2408	<	next += 16667;
2475	>
2476		int64 delay = next - GetTicks_usec();
2477	<	if (delay > 0)
2478	<	Delay_usec(delay);
2479	<	else if (delay < -16667)
2477	>	if (delay < -VIDEO_REFRESH_DELAY) {
2478	>
2479	>	// We are lagging far behind, so we reset the delay mechanism
2480		next = GetTicks_usec();
2481	<	ticks++;
2481	>
2482	>	} else if (delay <= 0) {
2483	>
2484	>	// Delay expired, refresh display
2485	>	handle_events();
2486	>	handle_palette_changes();
2487	>	video_refresh();
2488	>	next += VIDEO_REFRESH_DELAY;
2489	>	ticks++;
2490	>
2491	>	} else {
2492	>
2493	>	// No display refresh pending, check for X events
2494	>	fd_set readfds;
2495	>	FD_ZERO(&readfds);
2496	>	FD_SET(fd, &readfds);
2497	>	struct timeval timeout;
2498	>	timeout.tv_sec = 0;
2499	>	timeout.tv_usec = delay;
2500	>	if (select(fd+1, &readfds, NULL, NULL, &timeout) > 0)
2501	>	handle_events();
2502	>	}
2503		}
2504	+
2505		uint64 end = GetTicks_usec();
2506	<	// printf("%Ld ticks in %Ld usec = %Ld ticks/sec\n", ticks, end - start, ticks * 1000000 / (end - start));
2506	>	D(bug("%Ld refreshes in %Ld usec = %f refreshes/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
2507		return NULL;
2508		}
2509		#endif

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