X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fscreenhack.c;h=8ea025d0da6068ba5e3b8795718a14d61c960d27;hp=426155363e0497dbc8de5a2efcbdab212a0142a0;hb=07faf451b99879183ed7e909e43a0e065be1ee7f;hpb=6edc84f12f15860a71430c45e8392a5e4ef8203c diff --git a/hacks/screenhack.c b/hacks/screenhack.c index 42615536..8ea025d0 100644 --- a/hacks/screenhack.c +++ b/hacks/screenhack.c @@ -1,4 +1,4 @@ -/* xscreensaver, Copyright (c) 1992, 1995 Jamie Zawinski +/* xscreensaver, Copyright (c) 1992-2006 Jamie Zawinski * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that @@ -16,20 +16,69 @@ The idea being that, when writing a graphics hack, you can just link with this .o to get all of the uninteresting junk out of the way. - - create a procedure `screenhack(dpy, window)' + Create a few static global procedures and variables: - - create a variable `char *progclass' which names this program's - resource class. + static void *YOURNAME_init (Display *, Window); - - create a variable `char defaults []' for the default resources. + Return an opaque structure representing your drawing state. - - create a variable `XrmOptionDescRec options []' for the command-line, - and `int options_size' which is `XtNumber (options)'. + static unsigned long YOURNAME_draw (Display *, Window, void *closure); - And that's it... + Draw one frame. + The `closure' arg is your drawing state, that you created in `init'. + Return the number of microseconds to wait until the next frame. + + This should return in some small fraction of a second. + Do not call `usleep' or loop excessively. For long loops, use a + finite state machine. + + static void YOURNAME_reshape (Display *, Window, void *closure, + unsigned int width, unsigned int height); + + Called when the size of the window changes with the new size. + + static Bool YOURNAME_event (Display *, Window, void *closure, + XEvent *event); + + Called when a keyboard or mouse event arrives. + Return True if you handle it in some way, False otherwise. + + static void YOURNAME_event (Display *, Window, void *closure); + + Called when you are done: free everything you've allocated, + including your private `state' structure. + + static char YOURNAME_defaults [] = { "...", "...", ... , 0 }; + + This variable is an array of strings, your default resources. + Null-terminate the list. + + static XrmOptionDescRec YOURNAME_options[] = { { ... }, ... { 0,0,0,0 } } + + This variable describes your command-line options. + Null-terminate the list. + + Finally , invoke the XSCREENSAVER_MODULE() macro to tie it all together. + + Additional caveats: + + - Make sure that all functions in your module are static (check this + by running "nm -g" on the .o file). + + - Do not use global variables: all such info must be stored in the + private `state' structure. + + - Do not static function-local variables, either. Put it in `state'. + + Assume that there are N independent runs of this code going in the + same address space at the same time: they must not affect each other. + + - Don't forget to write an XML file to describe the user interface + of your screen saver module. See .../hacks/config/README for details. */ -#include "version.h" +#define DEBUG_TIMING +#define DEBUG_PAIR #include #include @@ -37,34 +86,71 @@ #include #include #include -#include -#include "screenhack.h" +#include -char *progname; -XrmDatabase db; -Bool mono_p; +#ifdef __sgi +# include /* for SgiUseSchemes() */ +#endif /* __sgi */ -#if __STDC__ -# define P(x) x +#ifdef HAVE_XMU +# ifndef VMS +# include +# else /* VMS */ +# include +# endif #else -# define P(x)() +# include "xmu.h" #endif +#include "screenhackI.h" +#include "version.h" +#include "vroot.h" + +#ifndef _XSCREENSAVER_VROOT_H_ +# error Error! You have an old version of vroot.h! Check -I args. +#endif /* _XSCREENSAVER_VROOT_H_ */ + +#ifndef isupper +# define isupper(c) ((c) >= 'A' && (c) <= 'Z') +#endif +#ifndef _tolower +# define _tolower(c) ((c) - 'A' + 'a') +#endif + + +/* This is defined by the SCREENHACK_MAIN() macro via screenhack.h. + */ +extern struct xscreensaver_function_table *xscreensaver_function_table; + + +const char *progname; /* used by hacks in error messages */ +const char *progclass; /* used by ../utils/resources.c */ +Bool mono_p; /* used by hacks */ + static XrmOptionDescRec default_options [] = { { "-root", ".root", XrmoptionNoArg, "True" }, { "-window", ".root", XrmoptionNoArg, "False" }, { "-mono", ".mono", XrmoptionNoArg, "True" }, { "-install", ".installColormap", XrmoptionNoArg, "True" }, - { "-visual", ".visualID", XrmoptionSepArg, 0 } + { "-noinstall",".installColormap", XrmoptionNoArg, "False" }, + { "-visual", ".visualID", XrmoptionSepArg, 0 }, + { "-window-id", ".windowID", XrmoptionSepArg, 0 }, + +# ifdef DEBUG_PAIR + { "-pair", ".pair", XrmoptionNoArg, "True" }, +# endif /* DEBUG_PAIR */ + { 0, 0, 0, 0 } }; static char *default_defaults[] = { - "*root: false", - "*geometry: 500x500", /* this should be .geometry, but nooooo... */ + ".root: false", + "*geometry: 600x480", /* this should be .geometry, but nooooo... */ "*mono: false", "*installColormap: false", "*visualID: default", + "*windowID: ", + "*desktopGrabber: xscreensaver-getimage %s", 0 }; @@ -73,24 +159,59 @@ static int merged_options_size; static char **merged_defaults; static void -merge_options P((void)) +merge_options (void) { - int options_sizeof = options_size * sizeof (options[0]); - int defaults_size; - merged_options_size = XtNumber (default_options) + options_size; + struct xscreensaver_function_table *ft = xscreensaver_function_table; + + const XrmOptionDescRec *options = ft->options; + const char * const *defaults = ft->defaults; + const char *progclass = ft->progclass; + + int def_opts_size, opts_size; + int def_defaults_size, defaults_size; + + for (def_opts_size = 0; default_options[def_opts_size].option; + def_opts_size++) + ; + for (opts_size = 0; options[opts_size].option; opts_size++) + ; + + merged_options_size = def_opts_size + opts_size; merged_options = (XrmOptionDescRec *) - malloc (sizeof (default_options) + options_sizeof); - memcpy (merged_options, options, options_sizeof); - memcpy (merged_options + options_size, default_options, - sizeof (default_options)); + malloc ((merged_options_size + 1) * sizeof(*default_options)); + memcpy (merged_options, default_options, + (def_opts_size * sizeof(*default_options))); + memcpy (merged_options + def_opts_size, options, + ((opts_size + 1) * sizeof(*default_options))); - for (defaults_size = 0; defaults [defaults_size]; defaults_size++); + for (def_defaults_size = 0; default_defaults[def_defaults_size]; + def_defaults_size++) + ; + for (defaults_size = 0; defaults[defaults_size]; defaults_size++) + ; merged_defaults = (char **) - malloc (sizeof (default_defaults) + (defaults_size * sizeof (char *))); - memcpy (merged_defaults, default_defaults, sizeof (default_defaults)); - memcpy ((merged_defaults - 1 + - (sizeof (default_defaults) / sizeof (default_defaults[0]))), - defaults, ((defaults_size + 1) * sizeof (defaults[0]))); + malloc ((def_defaults_size + defaults_size + 1) * sizeof (*defaults));; + memcpy (merged_defaults, default_defaults, + def_defaults_size * sizeof(*defaults)); + memcpy (merged_defaults + def_defaults_size, defaults, + (defaults_size + 1) * sizeof(*defaults)); + + /* This totally sucks. Xt should behave like this by default. + If the string in `defaults' looks like ".foo", change that + to "Progclass.foo". + */ + { + char **s; + for (s = merged_defaults; *s; s++) + if (**s == '.') + { + const char *oldr = *s; + char *newr = (char *) malloc(strlen(oldr) + strlen(progclass) + 3); + strcpy (newr, progclass); + strcat (newr, oldr); + *s = newr; + } + } } @@ -99,9 +220,7 @@ merge_options P((void)) */ static int -screenhack_ehandler (dpy, error) - Display *dpy; - XErrorEvent *error; +screenhack_ehandler (Display *dpy, XErrorEvent *error) { fprintf (stderr, "\nX error in %s:\n", progname); if (XmuPrintDefaultErrorMessage (dpy, error, stderr)) @@ -112,44 +231,555 @@ screenhack_ehandler (dpy, error) } static Bool -MapNotify_event_p (dpy, event, window) - Display *dpy; - XEvent *event; - XPointer window; +MapNotify_event_p (Display *dpy, XEvent *event, XPointer window) { return (event->xany.type == MapNotify && event->xvisibility.window == (Window) window); } -void -main (argc, argv) - int argc; - char **argv; +static Atom XA_WM_PROTOCOLS, XA_WM_DELETE_WINDOW; + +/* Dead-trivial event handling: exits if "q" or "ESC" are typed. + Exit if the WM_PROTOCOLS WM_DELETE_WINDOW ClientMessage is received. + Returns False if the screen saver should now terminate. + */ +static Bool +screenhack_handle_event_1 (Display *dpy, XEvent *event) { - XtAppContext app; + switch (event->xany.type) + { + case KeyPress: + { + KeySym keysym; + char c = 0; + XLookupString (&event->xkey, &c, 1, &keysym, 0); + if (c == 'q' || + c == 'Q' || + c == 3 || /* ^C */ + c == 27) /* ESC */ + return False; /* exit */ + else if (! (keysym >= XK_Shift_L && keysym <= XK_Hyper_R)) + XBell (dpy, 0); /* beep for non-chord keys */ + } + break; + case ButtonPress: + XBell (dpy, 0); + break; + case ClientMessage: + { + if (event->xclient.message_type != XA_WM_PROTOCOLS) + { + char *s = XGetAtomName(dpy, event->xclient.message_type); + if (!s) s = "(null)"; + fprintf (stderr, "%s: unknown ClientMessage %s received!\n", + progname, s); + } + else if (event->xclient.data.l[0] != XA_WM_DELETE_WINDOW) + { + char *s1 = XGetAtomName(dpy, event->xclient.message_type); + char *s2 = XGetAtomName(dpy, event->xclient.data.l[0]); + if (!s1) s1 = "(null)"; + if (!s2) s2 = "(null)"; + fprintf (stderr, "%s: unknown ClientMessage %s[%s] received!\n", + progname, s1, s2); + } + else + { + return False; /* exit */ + } + } + break; + } + return True; +} + + +static Visual * +pick_visual (Screen *screen) +{ + struct xscreensaver_function_table *ft = xscreensaver_function_table; + + if (ft->pick_visual_hook) + { + Visual *v = ft->pick_visual_hook (screen); + if (v) return v; + } + + return get_visual_resource (screen, "visualID", "VisualID", False); +} + + +/* Notice when the user has requested a different visual or colormap + on a pre-existing window (e.g., "-root -visual truecolor" or + "-window-id 0x2c00001 -install") and complain, since when drawing + on an existing window, we have no choice about these things. + */ +static void +visual_warning (Screen *screen, Window window, Visual *visual, Colormap cmap, + Bool window_p) +{ + struct xscreensaver_function_table *ft = xscreensaver_function_table; + + char *visual_string = get_string_resource (DisplayOfScreen (screen), + "visualID", "VisualID"); + Visual *desired_visual = pick_visual (screen); + char win[100]; + char why[100]; + + if (window == RootWindowOfScreen (screen)) + strcpy (win, "root window"); + else + sprintf (win, "window 0x%lx", (unsigned long) window); + + if (window_p) + sprintf (why, "-window-id 0x%lx", (unsigned long) window); + else + strcpy (why, "-root"); + + if (visual_string && *visual_string) + { + char *s; + for (s = visual_string; *s; s++) + if (isupper (*s)) *s = _tolower (*s); + + if (!strcmp (visual_string, "default") || + !strcmp (visual_string, "default") || + !strcmp (visual_string, "best")) + /* don't warn about these, just silently DWIM. */ + ; + else if (visual != desired_visual) + { + fprintf (stderr, "%s: ignoring `-visual %s' because of `%s'.\n", + progname, visual_string, why); + fprintf (stderr, "%s: using %s's visual 0x%lx.\n", + progname, win, XVisualIDFromVisual (visual)); + } + free (visual_string); + } + + if (visual == DefaultVisualOfScreen (screen) && + has_writable_cells (screen, visual) && + get_boolean_resource (DisplayOfScreen (screen), + "installColormap", "InstallColormap")) + { + fprintf (stderr, "%s: ignoring `-install' because of `%s'.\n", + progname, why); + fprintf (stderr, "%s: using %s's colormap 0x%lx.\n", + progname, win, (unsigned long) cmap); + } + + if (ft->validate_visual_hook) + { + if (! ft->validate_visual_hook (screen, win, visual)) + exit (1); + } +} + + +static void +fix_fds (void) +{ + /* Bad Things Happen if stdin, stdout, and stderr have been closed + (as by the `sh incantation "attraction >&- 2>&-"). When you do + that, the X connection gets allocated to one of these fds, and + then some random library writes to stderr, and random bits get + stuffed down the X pipe, causing "Xlib: sequence lost" errors. + So, we cause the first three file descriptors to be open to + /dev/null if they aren't open to something else already. This + must be done before any other files are opened (or the closing + of that other file will again free up one of the "magic" first + three FDs.) + + We do this by opening /dev/null three times, and then closing + those fds, *unless* any of them got allocated as #0, #1, or #2, + in which case we leave them open. Gag. + + Really, this crap is technically required of *every* X program, + if you want it to be robust in the face of "2>&-". + */ + int fd0 = open ("/dev/null", O_RDWR); + int fd1 = open ("/dev/null", O_RDWR); + int fd2 = open ("/dev/null", O_RDWR); + if (fd0 > 2) close (fd0); + if (fd1 > 2) close (fd1); + if (fd2 > 2) close (fd2); +} + + +#ifdef DEBUG_TIMING + +static void +check_timing (unsigned long delay) +{ + static unsigned long frame_count = 0; + static unsigned long delay_sum = 0; + static struct timeval prev1 = { 0, }; + static struct timeval prev2 = { 0, }; + struct timeval now; + double uprev1, uprev2, unow; + +# ifdef GETTIMEOFDAY_TWO_ARGS + gettimeofday (&now, 0); +# else + gettimeofday (&now); +# endif + + if (prev1.tv_sec == 0) + prev1 = prev2 = now; + + frame_count++; + + uprev1 = prev1.tv_sec + ((double) prev1.tv_usec * 0.000001); + uprev2 = prev2.tv_sec + ((double) prev2.tv_usec * 0.000001); + unow = now.tv_sec + ((double) now.tv_usec * 0.000001); + + if (unow >= uprev1 + 1.5) + fprintf (stderr, + "%s: warning: blocked event processing for %.1f secs!\n", + progname, unow - uprev1); + prev1 = now; + + if (unow >= uprev2 + 10.0) + { + double fps = frame_count / (unow - uprev2); + double elapsed = unow - uprev2; + double slept = (delay_sum * 0.000001); + double sleep_ratio = slept / elapsed; + + if (sleep_ratio < 0.10) { + fprintf (stderr, + "%s: warning: only %.0f%% idle over the" + " last %2.0f secs (at %.1f FPS)\n", + progname, 100 * sleep_ratio, elapsed, fps); + } + + prev2 = now; + frame_count = 0; + delay_sum = 0; + } + + delay_sum += delay; +} + +#else /* !DEBUG_TIMING */ +# define check_timing(delay) /**/ +#endif /* !DEBUG_TIMING */ + +static Boolean +screenhack_table_handle_events (Display *dpy, + const struct xscreensaver_function_table *ft, + Window window, void *closure +#ifdef DEBUG_PAIR + , Window window2, void *closure2 +#endif + ) +{ + XtAppContext app = XtDisplayToApplicationContext (dpy); + + if (XtAppPending (app) & (XtIMTimer|XtIMAlternateInput)) + XtAppProcessEvent (app, XtIMTimer|XtIMAlternateInput); + + while (XPending (dpy)) + { + XEvent event; + XNextEvent (dpy, &event); + + if (event.xany.type == ConfigureNotify) + { + if (event.xany.window == window) + ft->reshape_cb (dpy, window, closure, + event.xconfigure.width, event.xconfigure.height); +#ifdef DEBUG_PAIR + if (event.xany.window == window2) + ft->reshape_cb (dpy, window2, closure2, + event.xconfigure.width, event.xconfigure.height); +#endif + } + else if (event.xany.type == ClientMessage || + (! (event.xany.window == window + ? ft->event_cb (dpy, window, closure, &event) +#ifdef DEBUG_PAIR + : event.xany.window == window2 + ? ft->event_cb (dpy, window2, closure2, &event) +#endif + : 0))) + if (! screenhack_handle_event_1 (dpy, &event)) + return False; + + if (XtAppPending (app) & (XtIMTimer|XtIMAlternateInput)) + XtAppProcessEvent (app, XtIMTimer|XtIMAlternateInput); + } + return True; +} + + +static Boolean +usleep_and_process_events (Display *dpy, + const struct xscreensaver_function_table *ft, + Window window, void *closure, unsigned long delay +#ifdef DEBUG_PAIR + , Window window2, void *closure2, unsigned long delay2 +#endif + ) +{ + do { + unsigned long quantum = 100000; /* 1/10th second */ + if (quantum > delay) + quantum = delay; + delay -= quantum; + + XSync (dpy, False); + if (quantum > 0) + usleep (quantum); + + check_timing (quantum); + + /* The above isn't quite right in pair-mode: we always run both windows + with the timing of window 2. But, it's just a debugging hack, so + that doesn't really matter that much... */ + + if (! screenhack_table_handle_events (dpy, ft, window, closure +#ifdef DEBUG_PAIR + , window2, closure2 +#endif + )) + return False; + } while (delay > 0); + + return True; +} + + +static void +run_screenhack_table (Display *dpy, + Window window, +# ifdef DEBUG_PAIR + Window window2, +# endif + const struct xscreensaver_function_table *ft) +{ + + /* Kludge: even though the init_cb functions are declared to take 2 args, + actually call them with 3, for the benefit of xlockmore_init() and + xlockmore_setup(). + */ + void *(*init_cb) (Display *, Window, void *) = + (void *(*) (Display *, Window, void *)) ft->init_cb; + + void *closure = init_cb (dpy, window, ft->setup_arg); + +#ifdef DEBUG_PAIR + void *closure2 = 0; + if (window2) closure2 = init_cb (dpy, window2, ft->setup_arg); +#endif + + if (! closure) /* if it returns nothing, it can't possibly be re-entrant. */ + abort(); + + while (1) + { + unsigned long delay = ft->draw_cb (dpy, window, closure); +#ifdef DEBUG_PAIR + unsigned long delay2; + if (window2) delay2 = ft->draw_cb (dpy, window2, closure2); +#endif + + if (! usleep_and_process_events (dpy, ft, + window, closure, delay +#ifdef DEBUG_PAIR + , window2, closure2, delay2 +#endif + )) + break; + } + + ft->free_cb (dpy, window, closure); + +#ifdef DEBUG_PAIR + if (window2) + ft->free_cb (dpy, window2, closure2); +#endif +} + + +static Widget +make_shell (Screen *screen, Widget toplevel, int width, int height) +{ + Display *dpy = DisplayOfScreen (screen); + Visual *visual = pick_visual (screen); + Boolean def_visual_p = (toplevel && + visual == DefaultVisualOfScreen (screen)); + + if (width <= 0) width = 600; + if (height <= 0) height = 480; + +# ifdef USE_GL + if (!validate_gl_visual (stderr, screen, "window", visual)) + exit (1); +# endif /* USE_GL */ + + if (def_visual_p) + { + Window window; + XtVaSetValues (toplevel, + XtNmappedWhenManaged, False, + XtNwidth, width, + XtNheight, height, + XtNinput, True, /* for WM_HINTS */ + NULL); + XtRealizeWidget (toplevel); + window = XtWindow (toplevel); + + if (get_boolean_resource (dpy, "installColormap", "InstallColormap")) + { + Colormap cmap = + XCreateColormap (dpy, window, DefaultVisualOfScreen (screen), + AllocNone); + XSetWindowColormap (dpy, window, cmap); + } + } + else + { + unsigned int bg, bd; + Widget new; + Colormap cmap = XCreateColormap (dpy, VirtualRootWindowOfScreen(screen), + visual, AllocNone); + bg = get_pixel_resource (dpy, cmap, "background", "Background"); + bd = get_pixel_resource (dpy, cmap, "borderColor", "Foreground"); + + new = XtVaAppCreateShell (progname, progclass, + topLevelShellWidgetClass, dpy, + XtNmappedWhenManaged, False, + XtNvisual, visual, + XtNdepth, visual_depth (screen, visual), + XtNwidth, width, + XtNheight, height, + XtNcolormap, cmap, + XtNbackground, (Pixel) bg, + XtNborderColor, (Pixel) bd, + XtNinput, True, /* for WM_HINTS */ + NULL); + + if (!toplevel) /* kludge for the second window in -pair mode... */ + XtVaSetValues (new, XtNx, 0, XtNy, 550, NULL); + + XtRealizeWidget (new); + toplevel = new; + } + + return toplevel; +} + +static void +init_window (Display *dpy, Widget toplevel, const char *title) +{ + Window window; + XWindowAttributes xgwa; + XtPopup (toplevel, XtGrabNone); + XtVaSetValues (toplevel, XtNtitle, title, NULL); + + /* Select KeyPress, and announce that we accept WM_DELETE_WINDOW. + */ + window = XtWindow (toplevel); + XGetWindowAttributes (dpy, window, &xgwa); + XSelectInput (dpy, window, + (xgwa.your_event_mask | KeyPressMask | + ButtonPressMask | ButtonReleaseMask)); + XChangeProperty (dpy, window, XA_WM_PROTOCOLS, XA_ATOM, 32, + PropModeReplace, + (unsigned char *) &XA_WM_DELETE_WINDOW, 1); +} + + +int +main (int argc, char **argv) +{ + struct xscreensaver_function_table *ft = xscreensaver_function_table; + + XWindowAttributes xgwa; Widget toplevel; Display *dpy; Window window; - Visual *visual; - Colormap cmap; +# ifdef DEBUG_PAIR + Window window2 = 0; + Widget toplevel2 = 0; +# endif + XtAppContext app; Bool root_p; + Window on_window = 0; XEvent event; + Boolean dont_clear; + char version[255]; + + fix_fds(); + + progname = argv[0]; /* reset later */ + progclass = ft->progclass; + + if (ft->setup_cb) + ft->setup_cb (ft, ft->setup_arg); merge_options (); + +#ifdef __sgi + /* We have to do this on SGI to prevent the background color from being + overridden by the current desktop color scheme (we'd like our backgrounds + to be black, thanks.) This should be the same as setting the + "*useSchemes: none" resource, but it's not -- if that resource is + present in the `default_defaults' above, it doesn't work, though it + does work when passed as an -xrm arg on the command line. So screw it, + turn them off from C instead. + */ + SgiUseSchemes ("none"); +#endif /* __sgi */ + toplevel = XtAppInitialize (&app, progclass, merged_options, merged_options_size, &argc, argv, merged_defaults, 0, 0); + dpy = XtDisplay (toplevel); - db = XtDatabase (dpy); - XtGetApplicationNameAndClass (dpy, &progname, &progclass); + + XtGetApplicationNameAndClass (dpy, + (char **) &progname, + (char **) &progclass); + + /* half-assed way of avoiding buffer-overrun attacks. */ + if (strlen (progname) >= 100) ((char *) progname)[100] = 0; + XSetErrorHandler (screenhack_ehandler); + + XA_WM_PROTOCOLS = XInternAtom (dpy, "WM_PROTOCOLS", False); + XA_WM_DELETE_WINDOW = XInternAtom (dpy, "WM_DELETE_WINDOW", False); + + { + char *v = (char *) strdup(strchr(screensaver_id, ' ')); + char *s1, *s2, *s3, *s4; + s1 = (char *) strchr(v, ' '); s1++; + s2 = (char *) strchr(s1, ' '); + s3 = (char *) strchr(v, '('); s3++; + s4 = (char *) strchr(s3, ')'); + *s2 = 0; + *s4 = 0; + sprintf (version, "%s: from the XScreenSaver %s distribution (%s.)", + progclass, s1, s3); + free(v); + } + if (argc > 1) { + const char *s; int i; int x = 18; int end = 78; - fprintf (stderr, "%s: unrecognised option \"%s\"\n", progname, argv[1]); + Bool help_p = (!strcmp(argv[1], "-help") || + !strcmp(argv[1], "--help")); + fprintf (stderr, "%s\n", version); + for (s = progclass; *s; s++) fprintf(stderr, " "); + fprintf (stderr, " http://www.jwz.org/xscreensaver/\n\n"); + + if (!help_p) + fprintf(stderr, "Unrecognised option: %s\n", argv[1]); fprintf (stderr, "Options include: "); for (i = 0; i < merged_options_size; i++) { @@ -166,82 +796,156 @@ main (argc, argv) if (argp) fprintf (stderr, " "); if (i != merged_options_size - 1) fprintf (stderr, ", "); } + fprintf (stderr, ".\n"); - exit (1); + +#if 0 + if (help_p) + { + fprintf (stderr, "\nResources:\n\n"); + for (i = 0; i < merged_options_size; i++) + { + const char *opt = merged_options [i].option; + const char *res = merged_options [i].specifier + 1; + const char *val = merged_options [i].value; + char *s = get_string_resource (dpy, (char *) res, (char *) res); + + if (s) + { + int L = strlen(s); + while (L > 0 && (s[L-1] == ' ' || s[L-1] == '\t')) + s[--L] = 0; + } + + fprintf (stderr, " %-16s %-18s ", opt, res); + if (merged_options [i].argKind == XrmoptionSepArg) + { + fprintf (stderr, "[%s]", (s ? s : "?")); + } + else + { + fprintf (stderr, "%s", (val ? val : "(null)")); + if (val && s && !strcasecmp (val, s)) + fprintf (stderr, " [default]"); + } + fprintf (stderr, "\n"); + } + fprintf (stderr, "\n"); + } +#endif + + exit (help_p ? 0 : 1); } - mono_p = get_boolean_resource ("mono", "Boolean"); + free (merged_options); + free (merged_defaults); + merged_options = 0; + merged_defaults = 0; + + dont_clear = get_boolean_resource (dpy, "dontClearRoot", "Boolean"); + mono_p = get_boolean_resource (dpy, "mono", "Boolean"); if (CellsOfScreen (DefaultScreenOfDisplay (dpy)) <= 2) mono_p = True; - root_p = get_boolean_resource ("root", "Boolean"); - if (root_p) + root_p = get_boolean_resource (dpy, "root", "Boolean"); + + { + char *s = get_string_resource (dpy, "windowID", "WindowID"); + if (s && *s) + on_window = get_integer_resource (dpy, "windowID", "WindowID"); + if (s) free (s); + } + + if (on_window) { - XWindowAttributes xgwa; - window = RootWindowOfScreen (XtScreen (toplevel)); + window = (Window) on_window; XtDestroyWidget (toplevel); XGetWindowAttributes (dpy, window, &xgwa); - cmap = xgwa.colormap; - visual = xgwa.visual; + visual_warning (xgwa.screen, window, xgwa.visual, xgwa.colormap, True); + + /* Select KeyPress and resize events on the external window. + */ + xgwa.your_event_mask |= KeyPressMask | StructureNotifyMask; + XSelectInput (dpy, window, xgwa.your_event_mask); + + /* Select ButtonPress and ButtonRelease events on the external window, + if no other app has already selected them (only one app can select + ButtonPress at a time: BadAccess results.) + */ + if (! (xgwa.all_event_masks & (ButtonPressMask | ButtonReleaseMask))) + XSelectInput (dpy, window, + (xgwa.your_event_mask | + ButtonPressMask | ButtonReleaseMask)); + } + else if (root_p) + { + window = VirtualRootWindowOfScreen (XtScreen (toplevel)); + XtDestroyWidget (toplevel); + XGetWindowAttributes (dpy, window, &xgwa); + visual_warning (xgwa.screen, window, xgwa.visual, xgwa.colormap, False); } else { - visual = get_visual_resource (dpy, "visualID", "VisualID"); + Widget new = make_shell (XtScreen (toplevel), toplevel, + toplevel->core.width, + toplevel->core.height); + if (new != toplevel) + { + XtDestroyWidget (toplevel); + toplevel = new; + } - XtVaSetValues (toplevel, XtNmappedWhenManaged, False, 0); - XtRealizeWidget (toplevel); + init_window (dpy, toplevel, version); window = XtWindow (toplevel); + XGetWindowAttributes (dpy, window, &xgwa); - if (visual != DefaultVisualOfScreen (XtScreen (toplevel))) - { - Arg av [20]; - int ac; - unsigned int bg, bd; - Widget new; - cmap = XCreateColormap (dpy, window, visual, AllocNone); - bg = get_pixel_resource ("background", "Background", dpy, cmap); - bd = get_pixel_resource ("borderColor", "Foreground", dpy, cmap); - ac = 0; - XtSetArg (av[ac], XtNvisual, visual); ac++; - XtSetArg (av[ac], XtNcolormap, cmap); ac++; - XtSetArg (av[ac], XtNdepth, get_visual_depth (dpy, visual)); ac++; - XtSetArg (av[ac], XtNbackground, (Pixel) bg); ac++; - XtSetArg (av[ac], XtNborderColor, (Pixel) bd); ac++; - new = XtAppCreateShell (progname, progclass, - topLevelShellWidgetClass, dpy, - av, ac); - XtDestroyWidget (toplevel); - toplevel = new; - } - else if (get_boolean_resource ("installColormap", "InstallColormap")) - { - cmap = XCreateColormap (dpy, window, - DefaultVisualOfScreen (XtScreen (toplevel)), - AllocNone); - XSetWindowColormap (dpy, window, cmap); - } - else - { - cmap = DefaultColormap (dpy, DefaultScreen (dpy)); - } - - XtPopup (toplevel, XtGrabNone); - window = XtWindow (toplevel); +# ifdef DEBUG_PAIR + if (get_boolean_resource (dpy, "pair", "Boolean")) + { + toplevel2 = make_shell (xgwa.screen, 0, + toplevel->core.width, + toplevel->core.height); + init_window (dpy, toplevel2, version); + window2 = XtWindow (toplevel2); + } +# endif /* DEBUG_PAIR */ } - if (!get_boolean_resource ("dontClearWindow", "Boolean")) /* kludge-o-rama */ + if (!dont_clear) { - XSetWindowBackground (dpy, window, - get_pixel_resource ("background", "Background", - dpy, cmap)); + unsigned int bg = get_pixel_resource (dpy, xgwa.colormap, + "background", "Background"); + XSetWindowBackground (dpy, window, bg); XClearWindow (dpy, window); +# ifdef DEBUG_PAIR + if (window2) + { + XSetWindowBackground (dpy, window2, bg); + XClearWindow (dpy, window2); + } +# endif } - if (!root_p && toplevel->core.mapped_when_managed) + if (!root_p && !on_window) /* wait for it to be mapped */ XIfEvent (dpy, &event, MapNotify_event_p, (XPointer) window); XSync (dpy, False); - srandom ((int) time ((time_t *) 0)); - screenhack (dpy, window); + + /* This is the one and only place that the random-number generator is + seeded in any screenhack. You do not need to seed the RNG again, + it is done for you before your code is invoked. */ +# undef ya_rand_init + ya_rand_init (0); + + run_screenhack_table (dpy, window, +# ifdef DEBUG_PAIR + window2, +# endif + ft); + + XtDestroyWidget (toplevel); + XtDestroyApplicationContext (app); + + return 0; }