X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fdecayscreen.c;h=fa6561c1dae1a2e160ab87edc466193a9b972e27;hp=ce18a7ee3a56728bd12db7d60af7ed0442a483f6;hb=96a411663168b0ba5432b407a83be55f3df0c802;hpb=ccbc9f87eb59497b23bd0424ee1ed20ad7c7db54 diff --git a/hacks/decayscreen.c b/hacks/decayscreen.c index ce18a7ee..fa6561c1 100644 --- a/hacks/decayscreen.c +++ b/hacks/decayscreen.c @@ -1,5 +1,5 @@ -/* xscreensaver, Copyright (c) 1992, 1993, 1994 - * Jamie Zawinski +/* xscreensaver, Copyright (c) 1992, 1993, 1994, 1996, 1997 + * 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 @@ -28,6 +28,12 @@ * * 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" @@ -35,33 +41,85 @@ static int sizex, sizey; static int delay; static GC gc; +static int mode; +static int iterations=100; + +#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 -init_decay (dpy, window) - Display *dpy; - Window window; +init_decay (Display *dpy, Window window) { XGCValues gcv; XWindowAttributes xgwa; - int root_p; - Pixmap pixmap; + long gcflags; + unsigned long bg; + + char *s = get_string_resource("mode", "Mode"); + if (s && !strcmp(s, "shuffle")) mode = SHUFFLE; + else if (s && !strcmp(s, "up")) mode = UP; + else if (s && !strcmp(s, "left")) mode = LEFT; + else if (s && !strcmp(s, "right")) mode = RIGHT; + else if (s && !strcmp(s, "down")) mode = DOWN; + else if (s && !strcmp(s, "upleft")) mode = UPLEFT; + else if (s && !strcmp(s, "downleft")) mode = DOWNLEFT; + else if (s && !strcmp(s, "upright")) mode = UPRIGHT; + else if (s && !strcmp(s, "downright")) mode = DOWNRIGHT; + else if (s && !strcmp(s, "in")) mode = IN; + else if (s && !strcmp(s, "out")) mode = OUT; + else if (s && !strcmp(s, "melt")) mode = MELT; + else if (s && !strcmp(s, "stretch")) mode = STRETCH; + else if (s && !strcmp(s, "fuzz")) mode = FUZZ; + else { + if (s && *s && !!strcmp(s, "random")) + fprintf(stderr, "%s: unknown mode %s\n", progname, s); + mode = random() % (FUZZ+1); + } delay = get_integer_resource ("delay", "Integer"); - root_p = get_boolean_resource ("root", "Boolean"); if (delay < 0) delay = 0; + XGetWindowAttributes (dpy, window, &xgwa); + gcv.function = GXcopy; gcv.subwindow_mode = IncludeInferiors; - gc = XCreateGC (dpy, window, GCForeground |GCFunction | GCSubwindowMode, - &gcv); - XGetWindowAttributes (dpy, window, &xgwa); + if (mode == MELT || mode == STRETCH) { + bg = get_pixel_resource ("background", "Background", dpy, xgwa.colormap); + gcv.foreground = bg; + } + + gcflags = GCForeground |GCFunction; + if (use_subwindow_mode_p(xgwa.screen, window)) /* see grabscreen.c */ + gcflags |= GCSubwindowMode; + gc = XCreateGC (dpy, window, gcflags, &gcv); + sizex = xgwa.width; sizey = xgwa.height; - copy_default_colormap_contents (dpy, xgwa.colormap, xgwa.visual); - pixmap = grab_screen_image (dpy, window, root_p); + load_random_image (xgwa.screen, window, window, NULL); + + if (mode == MELT || mode == STRETCH) { + /* make sure screen eventually turns background color */ + XDrawLine(dpy, window, gc, 0, 0, sizex, 0); + + /* slow down for smoother melting*/ + iterations = 1; + } + } @@ -69,51 +127,144 @@ init_decay (dpy, window) * perform one iteration of decay */ static void -decay1 (dpy, window) - Display *dpy; - Window window; +decay1 (Display *dpy, Window window) { - int left, top, width, height; + int left, top, width, height, toleft, totop; + +#define L 101 +#define R 102 +#define U 103 +#define D 104 + static int no_bias[] = { L,L,L,L, R,R,R,R, U,U,U,U, D,D,D,D }; + static int up_bias[] = { L,L,L,L, R,R,R,R, U,U,U,U, U,U,D,D }; + static int down_bias[] = { L,L,L,L, R,R,R,R, U,U,D,D, D,D,D,D }; + static int left_bias[] = { L,L,L,L, L,L,R,R, U,U,U,U, D,D,D,D }; + static int right_bias[] = { L,L,R,R, R,R,R,R, U,U,U,U, D,D,D,D }; + + static int upleft_bias[] = { L,L,L,L, L,R,R,R, U,U,U,U, U,D,D,D }; + static int downleft_bias[] = { L,L,L,L, L,R,R,R, U,U,U,D, D,D,D,D }; + static int upright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,U, U,D,D,D }; + static int downright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,D, D,D,D,D }; + static int *bias; + + switch (mode) { + case SHUFFLE: bias = no_bias; break; + case UP: bias = up_bias; break; + case LEFT: bias = left_bias; break; + case RIGHT: bias = right_bias; break; + case DOWN: bias = down_bias; break; + case UPLEFT: bias = upleft_bias; break; + case DOWNLEFT: bias = downleft_bias; break; + case UPRIGHT: bias = upright_bias; break; + case DOWNRIGHT: bias = downright_bias; break; + case IN: bias = no_bias; break; + case OUT: bias = no_bias; break; + case MELT: bias = no_bias; break; + case STRETCH: bias = no_bias; break; + case FUZZ: bias = no_bias; break; + default: abort(); + } #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; + if (mode == MELT || mode == STRETCH) { + left = nrnd(sizex/2); + top = nrnd(sizey); + width = nrnd( sizex/2 ) + sizex/2 - left; + height = nrnd(sizey - top); + toleft = left; + totop = top+1; + + } else if (mode == FUZZ) { /* By Vince Levey ; + inspired by the "melt" mode of the + "scrhack" IrisGL program by Paul Haeberli + circa 1991. */ + static int toggle = 0; + + left = nrnd(sizex - 1); + top = nrnd(sizey - 1); + toggle = !toggle; + if (toggle) + { + totop = top; + height = 1; + toleft = nrnd(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(sizey - 1); + if (totop > top) + { + height = totop-top; + totop = top; + top++; + } + else + { + height = top-totop; + top = totop; + totop++; + } + } + + } else { + + left = nrnd(sizex - 1); + top = nrnd(sizey); + width = nrnd(sizex - left); + height = nrnd(sizey - top); + + toleft = left; + totop = top; + if (mode == IN || mode == OUT) { + int x = left+(width/2); + int y = top+(height/2); + int cx = sizex/2; + int cy = sizey/2; + if (mode == IN) { + if (x > cx && y > cy) bias = upleft_bias; + else if (x < cx && y > cy) bias = upright_bias; + else if (x < cx && y < cy) bias = downright_bias; + else /* (x > cx && y < cy)*/ bias = downleft_bias; + } else { + if (x > cx && y > cy) bias = downright_bias; + else if (x < cx && y > cy) bias = downleft_bias; + else if (x < cx && y < cy) bias = upleft_bias; + else /* (x > cx && y < cy)*/ bias = upright_bias; + } + } + + switch (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 (mode == STRETCH) { + XCopyArea (dpy, window, window, gc, 0, sizey-top-2, sizex, top+1, + 0, sizey-top-1); + } else { + XCopyArea (dpy, window, window, gc, left, top, width, height, + toleft, totop); } - XSync (dpy, True); + #undef nrnd } @@ -121,26 +272,33 @@ decay1 (dpy, window) char *progclass = "DecayScreen"; char *defaults [] = { - "DecayScreen.mappedWhenManaged:false", - "DecayScreen.dontClearWindow: true", - "*delay: 10", + "*dontClearRoot: True", + +#ifdef __sgi /* really, HAVE_READ_DISPLAY_EXTENSION */ + "*visualID: Best", +#endif + + "*delay: 10000", + "*mode: random", 0 }; XrmOptionDescRec 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; +screenhack (Display *dpy, Window window) { init_decay (dpy, window); while (1) { + int i; + for (i = 0; i < iterations; i++) decay1 (dpy, window); - if (delay) usleep (delay); + XSync(dpy, False); + screenhack_handle_events (dpy); + if (delay) usleep (delay); } }