X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fdecayscreen.c;h=775e629282f9620aa8442fd2fddb2954e46321f7;hp=ce18a7ee3a56728bd12db7d60af7ed0442a483f6;hb=07faf451b99879183ed7e909e43a0e065be1ee7f;hpb=ccbc9f87eb59497b23bd0424ee1ed20ad7c7db54 diff --git a/hacks/decayscreen.c b/hacks/decayscreen.c index ce18a7ee..775e6292 100644 --- a/hacks/decayscreen.c +++ b/hacks/decayscreen.c @@ -1,5 +1,4 @@ -/* xscreensaver, Copyright (c) 1992, 1993, 1994 - * 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 @@ -28,119 +27,311 @@ * * Vivek Khera * 5-AUG-1993 + * + * Hacked by jwz, 28-Nov-97 (sped up and added new motion directions) + + * R. Schultz + * Added "melt" & "stretch" modes 28-Mar-1999 + * */ #include "screenhack.h" -static int sizex, sizey; -static int delay; -static GC gc; +struct state { + Display *dpy; + Window window; -static void -init_decay (dpy, window) - Display *dpy; - Window window; + int sizex, sizey; + int delay; + GC gc; + int mode; + int iterations; + + int fuzz_toggle; + const int *current_bias; + + async_load_state *img_loader; +}; + + +#define SHUFFLE 0 +#define UP 1 +#define LEFT 2 +#define RIGHT 3 +#define DOWN 4 +#define UPLEFT 5 +#define DOWNLEFT 6 +#define UPRIGHT 7 +#define DOWNRIGHT 8 +#define IN 9 +#define OUT 10 +#define MELT 11 +#define STRETCH 12 +#define FUZZ 13 + +static void * +decayscreen_init (Display *dpy, Window window) { + struct state *st = (struct state *) calloc (1, sizeof(*st)); XGCValues gcv; XWindowAttributes xgwa; - int root_p; - Pixmap pixmap; + long gcflags; + unsigned long bg; + char *s; + + st->dpy = dpy; + st->window = window; + + s = get_string_resource(st->dpy, "mode", "Mode"); + if (s && !strcmp(s, "shuffle")) st->mode = SHUFFLE; + else if (s && !strcmp(s, "up")) st->mode = UP; + else if (s && !strcmp(s, "left")) st->mode = LEFT; + else if (s && !strcmp(s, "right")) st->mode = RIGHT; + else if (s && !strcmp(s, "down")) st->mode = DOWN; + else if (s && !strcmp(s, "upleft")) st->mode = UPLEFT; + else if (s && !strcmp(s, "downleft")) st->mode = DOWNLEFT; + else if (s && !strcmp(s, "upright")) st->mode = UPRIGHT; + else if (s && !strcmp(s, "downright")) st->mode = DOWNRIGHT; + else if (s && !strcmp(s, "in")) st->mode = IN; + else if (s && !strcmp(s, "out")) st->mode = OUT; + else if (s && !strcmp(s, "melt")) st->mode = MELT; + else if (s && !strcmp(s, "stretch")) st->mode = STRETCH; + else if (s && !strcmp(s, "fuzz")) st->mode = FUZZ; + else { + if (s && *s && !!strcmp(s, "random")) + fprintf(stderr, "%s: unknown mode %s\n", progname, s); + st->mode = random() % (FUZZ+1); + } + + st->delay = get_integer_resource (st->dpy, "delay", "Integer"); - delay = get_integer_resource ("delay", "Integer"); - root_p = get_boolean_resource ("root", "Boolean"); + if (st->delay < 0) st->delay = 0; - if (delay < 0) delay = 0; + XGetWindowAttributes (st->dpy, st->window, &xgwa); gcv.function = GXcopy; gcv.subwindow_mode = IncludeInferiors; - gc = XCreateGC (dpy, window, GCForeground |GCFunction | GCSubwindowMode, - &gcv); + bg = get_pixel_resource (st->dpy, xgwa.colormap, "background", "Background"); + gcv.foreground = bg; - XGetWindowAttributes (dpy, window, &xgwa); - sizex = xgwa.width; - sizey = xgwa.height; + gcflags = GCForeground | GCFunction; + if (use_subwindow_mode_p(xgwa.screen, st->window)) /* see grabscreen.c */ + gcflags |= GCSubwindowMode; + st->gc = XCreateGC (st->dpy, st->window, gcflags, &gcv); - copy_default_colormap_contents (dpy, xgwa.colormap, xgwa.visual); - pixmap = grab_screen_image (dpy, window, root_p); + st->sizex = xgwa.width; + st->sizey = xgwa.height; + + if (st->mode == MELT || st->mode == STRETCH) + st->iterations = 1; /* slow down for smoother melting */ + + st->img_loader = load_image_async_simple (0, xgwa.screen, st->window, + st->window, 0, 0); + + return st; } /* * perform one iteration of decay */ -static void -decay1 (dpy, window) - Display *dpy; - Window window; +static unsigned long +decayscreen_draw (Display *dpy, Window window, void *closure) { - int left, top, width, height; - -#define nrnd(x) (random() % (x)) - - switch (random() % 8) { - case 0: /* move a block left */ - case 1: - left = nrnd(sizex - 1) + 1; - top = nrnd(sizey); - width = nrnd(sizex - left); - height = nrnd(sizey - top); - XCopyArea (dpy, window, window, gc, left, top, width, height, - left - 1, top); - break; - case 2: /* move a block right */ - case 3: - left = nrnd(sizex - 1); - top = nrnd(sizey); - width = nrnd(sizex - 1 - left); - height = nrnd(sizey - top); - XCopyArea (dpy, window, window, gc, left, top, width, height, - left + 1, top); - break; - case 4: /* move a block up */ - left = nrnd(sizex); - top = nrnd(sizey - 1) + 1; - width = nrnd(sizex - left); - height = nrnd(sizey - top); - XCopyArea (dpy, window, window, gc, left, top, width, height, - left, top - 1); - break; - default: /* move block down (biased to this) */ - left = nrnd(sizex); - top = nrnd(sizey - 1); - width = nrnd(sizex - left); - height = nrnd(sizey - 1 - top); - XCopyArea (dpy, window, window, gc, left, top, width, height, - left, top + 1); - break; + struct state *st = (struct state *) closure; + int left, top, width, height, toleft, totop; + +#define L 101 +#define R 102 +#define U 103 +#define D 104 + static const int no_bias[] = { L,L,L,L, R,R,R,R, U,U,U,U, D,D,D,D }; + static const int up_bias[] = { L,L,L,L, R,R,R,R, U,U,U,U, U,U,D,D }; + static const int down_bias[] = { L,L,L,L, R,R,R,R, U,U,D,D, D,D,D,D }; + static const int left_bias[] = { L,L,L,L, L,L,R,R, U,U,U,U, D,D,D,D }; + static const int right_bias[] = { L,L,R,R, R,R,R,R, U,U,U,U, D,D,D,D }; + + static const int upleft_bias[] = { L,L,L,L, L,R,R,R, U,U,U,U, U,D,D,D }; + static const int downleft_bias[] = { L,L,L,L, L,R,R,R, U,U,U,D, D,D,D,D }; + static const int upright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,U, U,D,D,D }; + static const int downright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,D, D,D,D,D }; + + if (st->img_loader) /* still loading */ + { + st->img_loader = load_image_async_simple (st->img_loader, + 0, 0, 0, 0, 0); + if (! st->img_loader) { /* just finished */ + if (st->mode == MELT || st->mode == STRETCH) + /* make sure screen eventually turns background color */ + XDrawLine (st->dpy, st->window, st->gc, 0, 0, st->sizex, 0); + } + return st->delay; + } + + switch (st->mode) { + case SHUFFLE: st->current_bias = no_bias; break; + case UP: st->current_bias = up_bias; break; + case LEFT: st->current_bias = left_bias; break; + case RIGHT: st->current_bias = right_bias; break; + case DOWN: st->current_bias = down_bias; break; + case UPLEFT: st->current_bias = upleft_bias; break; + case DOWNLEFT: st->current_bias = downleft_bias; break; + case UPRIGHT: st->current_bias = upright_bias; break; + case DOWNRIGHT: st->current_bias = downright_bias; break; + case IN: st->current_bias = no_bias; break; + case OUT: st->current_bias = no_bias; break; + case MELT: st->current_bias = no_bias; break; + case STRETCH: st->current_bias = no_bias; break; + case FUZZ: st->current_bias = no_bias; break; + default: abort(); + } + +#define nrnd(x) ((x) ? random() % (x) : x) + + if (st->mode == MELT || st->mode == STRETCH) { + left = nrnd(st->sizex/2); + top = nrnd(st->sizey); + width = nrnd( st->sizex/2 ) + st->sizex/2 - left; + height = nrnd(st->sizey - top); + toleft = left; + totop = top+1; + + } else if (st->mode == FUZZ) { /* By Vince Levey ; + inspired by the "melt" mode of the + "scrhack" IrisGL program by Paul Haeberli + circa 1991. */ + left = nrnd(st->sizex - 1); + top = nrnd(st->sizey - 1); + st->fuzz_toggle = !st->fuzz_toggle; + if (st->fuzz_toggle) + { + totop = top; + height = 1; + toleft = nrnd(st->sizex - 1); + if (toleft > left) + { + width = toleft-left; + toleft = left; + left++; + } + else + { + width = left-toleft; + left = toleft; + toleft++; + } + } + else + { + toleft = left; + width = 1; + totop = nrnd(st->sizey - 1); + if (totop > top) + { + height = totop-top; + totop = top; + top++; + } + else + { + height = top-totop; + top = totop; + totop++; + } + } + + } else { + + left = nrnd(st->sizex - 1); + top = nrnd(st->sizey); + width = nrnd(st->sizex - left); + height = nrnd(st->sizey - top); + + toleft = left; + totop = top; + if (st->mode == IN || st->mode == OUT) { + int x = left+(width/2); + int y = top+(height/2); + int cx = st->sizex/2; + int cy = st->sizey/2; + if (st->mode == IN) { + if (x > cx && y > cy) st->current_bias = upleft_bias; + else if (x < cx && y > cy) st->current_bias = upright_bias; + else if (x < cx && y < cy) st->current_bias = downright_bias; + else /* (x > cx && y < cy)*/ st->current_bias = downleft_bias; + } else { + if (x > cx && y > cy) st->current_bias = downright_bias; + else if (x < cx && y > cy) st->current_bias = downleft_bias; + else if (x < cx && y < cy) st->current_bias = upleft_bias; + else /* (x > cx && y < cy)*/ st->current_bias = upright_bias; + } + } + + switch (st->current_bias[random() % (sizeof(no_bias)/sizeof(*no_bias))]) { + case L: toleft = left-1; break; + case R: toleft = left+1; break; + case U: totop = top-1; break; + case D: totop = top+1; break; + default: abort(); break; + } + } + + if (st->mode == STRETCH) { + XCopyArea (st->dpy, st->window, st->window, st->gc, 0, st->sizey-top-2, st->sizex, top+1, + 0, st->sizey-top-1); + } else { + XCopyArea (st->dpy, st->window, st->window, st->gc, left, top, width, height, + toleft, totop); } - XSync (dpy, True); + #undef nrnd + + return st->delay; +} + +static void +decayscreen_reshape (Display *dpy, Window window, void *closure, + unsigned int w, unsigned int h) +{ + struct state *st = (struct state *) closure; + st->sizex = w; + st->sizey = h; +} + +static Bool +decayscreen_event (Display *dpy, Window window, void *closure, XEvent *event) +{ + return False; +} + +static void +decayscreen_free (Display *dpy, Window window, void *closure) +{ + struct state *st = (struct state *) closure; + free (st); } -char *progclass = "DecayScreen"; -char *defaults [] = { - "DecayScreen.mappedWhenManaged:false", - "DecayScreen.dontClearWindow: true", - "*delay: 10", +static const char *decayscreen_defaults [] = { + ".background: Black", + ".foreground: Yellow", + "*dontClearRoot: True", + +#ifdef __sgi /* really, HAVE_READ_DISPLAY_EXTENSION */ + "*visualID: Best", +#endif + + "*delay: 10000", + "*mode: random", 0 }; -XrmOptionDescRec options [] = { +static XrmOptionDescRec decayscreen_options [] = { { "-delay", ".delay", XrmoptionSepArg, 0 }, + { "-mode", ".mode", XrmoptionSepArg, 0 }, + { 0, 0, 0, 0 } }; -int options_size = (sizeof (options) / sizeof (options[0])); -void -screenhack (dpy, window) - Display *dpy; - Window window; -{ - init_decay (dpy, window); - while (1) { - decay1 (dpy, window); - if (delay) usleep (delay); - } -} +XSCREENSAVER_MODULE ("DecayScreen", decayscreen)