X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=utils%2Ffade.c;h=07b1a4e7d71484f1acd9a3089b43a3aa8cc6754e;hb=ce3185de9d9705e259f2b60dd4b5509007fa17d4;hp=2fbb2e97fa4f872609c6413ff5ca243977c57982;hpb=0a1527cc01e9894017614b7c36b838b2b6914ba9;p=xscreensaver diff --git a/utils/fade.c b/utils/fade.c index 2fbb2e97..07b1a4e7 100644 --- a/utils/fade.c +++ b/utils/fade.c @@ -1,4 +1,4 @@ -/* xscreensaver, Copyright (c) 1992 Jamie Zawinski +/* xscreensaver, Copyright (c) 1992-1998 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 @@ -9,101 +9,279 @@ * implied warranty. */ -#if __STDC__ -# include -#endif +#include "utils.h" -#include -#include -#include +#include /* for gettimeofday() */ -#if __STDC__ -# define bcopy(from,to,size) memcpy((to),(from),(size)) -# define bzero(addr,size) memset((addr),0,(size)) -extern void screenhack_usleep (unsigned long); -#else -extern void screenhack_usleep (); -#endif +#ifdef VMS +# include "vms-gtod.h" +#endif /* VMS */ -#define usleep screenhack_usleep +#include "visual.h" +#include "usleep.h" +#include "fade.h" -#define MAX_COLORS 4096 -static XColor orig_colors [MAX_COLORS]; -static XColor current_colors [MAX_COLORS]; -static int ncolors; Colormap -copy_colormap (dpy, cmap, into_cmap) - Display *dpy; - Colormap cmap, into_cmap; +copy_colormap (Screen *screen, Visual *visual, + Colormap cmap, Colormap into_cmap) { int i; - ncolors = CellsOfScreen (DefaultScreenOfDisplay (dpy)); - if (ncolors <= 2 || ncolors > MAX_COLORS) + Display *dpy = DisplayOfScreen (screen); + Window window = RootWindowOfScreen (screen); + int ncolors = CellsOfScreen (screen); + XColor *colors = 0; + + /* If this is a colormap on a mono visual, or one with insanely many + color cells, bug out. */ + if (ncolors <= 2 || ncolors > 4096) return 0; + /* If this is a non-writable visual, bug out. */ + if (!has_writable_cells (screen, visual)) + return 0; + if (! into_cmap) - into_cmap = XCreateColormap (dpy, RootWindow (dpy, DefaultScreen (dpy)), - DefaultVisual (dpy, DefaultScreen (dpy)), - AllocAll); + into_cmap = XCreateColormap (dpy, window, visual, AllocAll); if (! cmap) - cmap = DefaultColormap (dpy, DefaultScreen (dpy)); + cmap = DefaultColormapOfScreen (screen); + + colors = (XColor *) calloc(sizeof(XColor), ncolors); for (i = 0; i < ncolors; i++) - orig_colors [i].pixel = i; - XQueryColors (dpy, cmap, orig_colors, ncolors); - XStoreColors (dpy, into_cmap, orig_colors, ncolors); + colors [i].pixel = i; + XQueryColors (dpy, cmap, colors, ncolors); + XStoreColors (dpy, into_cmap, colors, ncolors); + free (colors); return into_cmap; } + void -blacken_colormap (dpy, cmap) - Display *dpy; - Colormap cmap; +blacken_colormap (Screen *screen, Colormap cmap) { + Display *dpy = DisplayOfScreen (screen); + int ncolors = CellsOfScreen (screen); + XColor *colors; int i; + if (ncolors > 4096) + return; + colors = (XColor *) calloc(sizeof(XColor), ncolors); for (i = 0; i < ncolors; i++) + colors[i].pixel = i; + XStoreColors (dpy, cmap, colors, ncolors); + free (colors); +} + + + +static void fade_screens_1 (Display *dpy, Colormap *cmaps, + Window *black_windows, int seconds, int ticks, + Bool out_p, Bool clear_windows); +#ifdef HAVE_SGI_VC_EXTENSION +static int sgi_gamma_fade (Display *dpy, + Window *black_windows, int seconds, int ticks, + Bool out_p, Bool clear_windows); +#endif /* HAVE_SGI_VC_EXTENSION */ + + + +void +fade_screens (Display *dpy, Colormap *cmaps, Window *black_windows, + int seconds, int ticks, + Bool out_p, Bool clear_windows) +{ + int oseconds = seconds; + Bool was_in_p = !out_p; + + /* When we're asked to fade in, first fade out, then fade in. + That way all the transitions are smooth -- from what's on the + screen, to black, to the desktop. + */ + if (was_in_p) + { + clear_windows = True; + out_p = True; + seconds /= 3; + if (seconds == 0) + seconds = 1; + } + + AGAIN: + +#ifdef HAVE_SGI_VC_EXTENSION + /* First try to do it by fading the gamma in an SGI-specific way... */ + if (0 != sgi_gamma_fade(dpy, black_windows, seconds, ticks, out_p, + clear_windows)) +#endif /* HAVE_SGI_VC_EXTENSION */ + /* Else, do it the old-fashioned way, which (somewhat) loses if + there are TrueColor windows visible. */ + fade_screens_1 (dpy, cmaps, black_windows, seconds, ticks, + out_p, clear_windows); + + /* If we were supposed to be fading in, do so now (we just faded out, + so now fade back in.) + */ + if (was_in_p) { - current_colors [i].pixel = i; - current_colors [i].red = current_colors [i].green = - current_colors [i].blue = 0; + was_in_p = False; + out_p = False; + seconds = oseconds * 2 / 3; + if (seconds == 0) + seconds = 1; + goto AGAIN; } - XStoreColors (dpy, cmap, current_colors, ncolors); } -void -fade_colormap (dpy, cmap, cmap2, seconds, ticks, out_p) - Display *dpy; - Colormap cmap, cmap2; - int seconds, ticks; - Bool out_p; +/* The business with `cmaps_per_screen' is to fake out the SGI 8-bit video + hardware, which is capable of installing multiple (4) colormaps + simultaniously. We have to install multiple copies of the same set of + colors in order to fill up all the available slots in the hardware color + lookup table, so we install an extra N colormaps per screen to make sure + that all screens really go black. + + I'm told that this trick also works with XInside's AcceleratedX when using + the Matrox Millenium card (which also allows multiple PseudoColor and + TrueColor visuals to co-exist and display properly at the same time.) + + This trick works ok on the 24-bit Indy video hardware, but doesn't work at + all on the O2 24-bit hardware. I guess the higher-end hardware is too + "good" for this to work (dammit.) So... I figured out the "right" way to + do this on SGIs, which is to ramp the monitor's gamma down to 0. That's + what is implemented in sgi_gamma_fade(), so we use that if we can. + */ +static void +fade_screens_1 (Display *dpy, Colormap *cmaps, Window *black_windows, + int seconds, int ticks, + Bool out_p, Bool clear_windows) { - int i; + int i, j, k; int steps = seconds * ticks; + long usecs_per_step = (long)(seconds * 1000000) / (long)steps; XEvent dummy_event; + int cmaps_per_screen = 5; + int nscreens = ScreenCount(dpy); + int ncmaps = nscreens * cmaps_per_screen; + Colormap *fade_cmaps = 0; + Bool installed = False; + int total_ncolors; + XColor *orig_colors, *current_colors, *screen_colors, *orig_screen_colors; + struct timeval then, now; +#ifdef GETTIMEOFDAY_TWO_ARGS + struct timezone tzp; +#endif - if (! cmap2) - return; + total_ncolors = 0; + for (i = 0; i < nscreens; i++) + total_ncolors += CellsOfScreen (ScreenOfDisplay(dpy, i)); - for (i = 0; i < ncolors; i++) - orig_colors [i].pixel = i; - XQueryColors (dpy, cmap, orig_colors, ncolors); - bcopy (orig_colors, current_colors, ncolors * sizeof (XColor)); + orig_colors = (XColor *) calloc(sizeof(XColor), total_ncolors); + current_colors = (XColor *) calloc(sizeof(XColor), total_ncolors); + + /* Get the contents of the colormap we are fading from or to. */ + screen_colors = orig_colors; + for (i = 0; i < nscreens; i++) + { + int ncolors = CellsOfScreen (ScreenOfDisplay (dpy, i)); + Colormap cmap = (cmaps ? cmaps[i] : 0); + if (!cmap) cmap = DefaultColormap(dpy, i); + + for (j = 0; j < ncolors; j++) + screen_colors[j].pixel = j; + XQueryColors (dpy, cmap, screen_colors, ncolors); + screen_colors += ncolors; + } + + memcpy (current_colors, orig_colors, total_ncolors * sizeof (XColor)); + + + /* Make the writable colormaps (we keep these around and reuse them.) */ + if (!fade_cmaps) + { + fade_cmaps = (Colormap *) calloc(sizeof(Colormap), ncmaps); + for (i = 0; i < nscreens; i++) + { + Visual *v = DefaultVisual(dpy, i); + Screen *s = ScreenOfDisplay(dpy, i); + if (has_writable_cells (s, v)) + for (j = 0; j < cmaps_per_screen; j++) + fade_cmaps[(i * cmaps_per_screen) + j] = + XCreateColormap (dpy, RootWindowOfScreen (s), v, AllocAll); + } + } + +#ifdef GETTIMEOFDAY_TWO_ARGS + gettimeofday(&then, &tzp); +#else + gettimeofday(&then); +#endif + + /* Iterate by steps of the animation... */ for (i = (out_p ? steps : 0); (out_p ? i > 0 : i < steps); (out_p ? i-- : i++)) { - int j; - for (j = 0; j < ncolors; j++) + + /* For each screen, compute the current value of each color... + */ + orig_screen_colors = orig_colors; + screen_colors = current_colors; + for (j = 0; j < nscreens; j++) + { + int ncolors = CellsOfScreen (ScreenOfDisplay (dpy, j)); + for (k = 0; k < ncolors; k++) + { + /* This doesn't take into account the relative luminance of the + RGB components (0.299, 0.587, and 0.114 at gamma 2.2) but + the difference is imperceptible for this application... */ + screen_colors[k].red = orig_screen_colors[k].red * i / steps; + screen_colors[k].green = orig_screen_colors[k].green * i / steps; + screen_colors[k].blue = orig_screen_colors[k].blue * i / steps; + } + screen_colors += ncolors; + orig_screen_colors += ncolors; + } + + /* Put the colors into the maps... + */ + screen_colors = current_colors; + for (j = 0; j < nscreens; j++) { - current_colors[j].red = orig_colors[j].red * i / steps; - current_colors[j].green = orig_colors[j].green * i / steps; - current_colors[j].blue = orig_colors[j].blue * i / steps; + int ncolors = CellsOfScreen (ScreenOfDisplay (dpy, j)); + for (k = 0; k < cmaps_per_screen; k++) + { + Colormap c = fade_cmaps[j * cmaps_per_screen + k]; + if (c) + XStoreColors (dpy, c, screen_colors, ncolors); + } + screen_colors += ncolors; } - XStoreColors (dpy, cmap2, current_colors, ncolors); + + /* Put the maps on the screens, and then take the windows off the screen. + (only need to do this the first time through the loop.) + */ + if (!installed) + { + for (j = 0; j < ncmaps; j++) + if (fade_cmaps[j]) + XInstallColormap (dpy, fade_cmaps[j]); + installed = True; + + if (black_windows && !out_p) + for (j = 0; j < nscreens; j++) + if (black_windows[j]) + { + XUnmapWindow (dpy, black_windows[j]); + XClearWindow (dpy, black_windows[j]); + } + } + XSync (dpy, False); - /* If there is user activity, bug out. + /* If there is user activity, bug out. (Bug out on keypresses or + mouse presses, but not motion, and not release events. Bugging + out on motion made the unfade hack be totally useless, I think.) + We put the event back so that the calling code can notice it too. It would be better to not remove it at all, but that's harder because Xlib has such a non-design for this kind of crap, and @@ -111,24 +289,301 @@ fade_colormap (dpy, cmap, cmap2, seconds, ticks, out_p) of order, so in the grand unix tradition we say "fuck it" and do something that mostly works for the time being. */ - if (XCheckMaskEvent (dpy, (KeyPressMask | KeyReleaseMask | - ButtonPressMask | ButtonReleaseMask | - PointerMotionMask), - &dummy_event)) + if (XCheckMaskEvent (dpy, (KeyPressMask|ButtonPressMask), &dummy_event)) { XPutBackEvent (dpy, &dummy_event); - return; + goto DONE; } - usleep (1000000 / (ticks * 2)); /* the 2 is a hack... */ +#ifdef GETTIMEOFDAY_TWO_ARGS + gettimeofday(&now, &tzp); +#else + gettimeofday(&now); +#endif + + /* If we haven't already used up our alotted time, sleep to avoid + changing the colormap too fast. */ + { + long diff = (((now.tv_sec - then.tv_sec) * 1000000) + + now.tv_usec - then.tv_usec); + then.tv_sec = now.tv_sec; + then.tv_usec = now.tv_usec; + if (usecs_per_step > diff) + usleep (usecs_per_step - diff); + } } + + DONE: + + if (orig_colors) free (orig_colors); + if (current_colors) free (current_colors); + + /* If we've been given windows to raise after blackout, raise them before + releasing the colormaps. + */ + if (out_p && black_windows) + { + for (i = 0; i < nscreens; i++) + { + if (clear_windows) + XClearWindow (dpy, black_windows[i]); + XMapRaised (dpy, black_windows[i]); + } + XSync(dpy, False); + } + + /* Now put the target maps back. + If we're fading out, use the given cmap (or the default cmap, if none.) + If we're fading in, always use the default cmap. + */ + for (i = 0; i < nscreens; i++) + { + Colormap cmap = (cmaps ? cmaps[i] : 0); + if (!cmap || !out_p) + cmap = DefaultColormap(dpy, i); + XInstallColormap (dpy, cmap); + } + + /* The fade (in or out) is complete, so we don't need the black maps on + stage any more. + */ + for (i = 0; i < ncmaps; i++) + if (fade_cmaps[i]) + { + XUninstallColormap(dpy, fade_cmaps[i]); + XFreeColormap(dpy, fade_cmaps[i]); + fade_cmaps[i] = 0; + } + free(fade_cmaps); + fade_cmaps = 0; } -#if 0 + +#ifdef HAVE_SGI_VC_EXTENSION + +# include + +struct screen_gamma_info { + int gamma_map; /* ??? always using 0 */ + int nred, ngreen, nblue; + unsigned short *red1, *green1, *blue1; + unsigned short *red2, *green2, *blue2; + int gamma_size; + int gamma_precision; + Bool alpha_p; +}; + + +static void whack_gamma(Display *dpy, int screen, + struct screen_gamma_info *info, float ratio); + +static int +sgi_gamma_fade (Display *dpy, + Window *black_windows, int seconds, int ticks, + Bool out_p, Bool clear_windows) +{ + int steps = seconds * ticks; + long usecs_per_step = (long)(seconds * 1000000) / (long)steps; + XEvent dummy_event; + int nscreens = ScreenCount(dpy); + struct timeval then, now; +#ifdef GETTIMEOFDAY_TWO_ARGS + struct timezone tzp; +#endif + int i, screen; + int status = -1; + struct screen_gamma_info *info = (struct screen_gamma_info *) + calloc(nscreens, sizeof(*info)); + + /* Get the current gamma maps for all screens. + Bug out and return -1 if we can't get them for some screen. + */ + for (screen = 0; screen < nscreens; screen++) + { + if (!XSGIvcQueryGammaMap(dpy, screen, info[screen].gamma_map, + &info[screen].gamma_size, + &info[screen].gamma_precision, + &info[screen].alpha_p)) + goto FAIL; + + if (!XSGIvcQueryGammaColors(dpy, screen, info[screen].gamma_map, + XSGIVC_COMPONENT_RED, + &info[screen].nred, &info[screen].red1)) + goto FAIL; + if (! XSGIvcQueryGammaColors(dpy, screen, info[screen].gamma_map, + XSGIVC_COMPONENT_GREEN, + &info[screen].ngreen, &info[screen].green1)) + goto FAIL; + if (!XSGIvcQueryGammaColors(dpy, screen, info[screen].gamma_map, + XSGIVC_COMPONENT_BLUE, + &info[screen].nblue, &info[screen].blue1)) + goto FAIL; + + if (info[screen].gamma_precision == 8) /* Scale it up to 16 bits. */ + { + int j; + for(j = 0; j < info[screen].nred; j++) + info[screen].red1[j] = + ((info[screen].red1[j] << 8) | info[screen].red1[j]); + for(j = 0; j < info[screen].ngreen; j++) + info[screen].green1[j] = + ((info[screen].green1[j] << 8) | info[screen].green1[j]); + for(j = 0; j < info[screen].nblue; j++) + info[screen].blue1[j] = + ((info[screen].blue1[j] << 8) | info[screen].blue1[j]); + } + + info[screen].red2 = (unsigned short *) + malloc(sizeof(*info[screen].red2) * (info[screen].nred+1)); + info[screen].green2 = (unsigned short *) + malloc(sizeof(*info[screen].green2) * (info[screen].ngreen+1)); + info[screen].blue2 = (unsigned short *) + malloc(sizeof(*info[screen].blue2) * (info[screen].nblue+1)); + } + +#ifdef GETTIMEOFDAY_TWO_ARGS + gettimeofday(&then, &tzp); +#else + gettimeofday(&then); +#endif + + /* If we're fading in (from black), then first crank the gamma all the + way down to 0, then take the windows off the screen. + */ + if (!out_p) + for (screen = 0; screen < nscreens; screen++) + { + whack_gamma(dpy, screen, &info[screen], 0.0); + if (black_windows && black_windows[screen]) + { + XUnmapWindow (dpy, black_windows[screen]); + XClearWindow (dpy, black_windows[screen]); + XSync(dpy, False); + } + } + + + /* Iterate by steps of the animation... */ + for (i = (out_p ? steps : 0); + (out_p ? i > 0 : i < steps); + (out_p ? i-- : i++)) + { + for (screen = 0; screen < nscreens; screen++) + { + whack_gamma(dpy, screen, &info[screen], + (((float)i) / ((float)steps))); + + /* If there is user activity, bug out. (Bug out on keypresses or + mouse presses, but not motion, and not release events. Bugging + out on motion made the unfade hack be totally useless, I think.) + + We put the event back so that the calling code can notice it too. + It would be better to not remove it at all, but that's harder + because Xlib has such a non-design for this kind of crap, and + in this application it doesn't matter if the events end up out + of order, so in the grand unix tradition we say "fuck it" and + do something that mostly works for the time being. + */ + if (XCheckMaskEvent (dpy, (KeyPressMask|ButtonPressMask), + &dummy_event)) + { + XPutBackEvent (dpy, &dummy_event); + goto DONE; + } + +#ifdef GETTIMEOFDAY_TWO_ARGS + gettimeofday(&now, &tzp); +#else + gettimeofday(&now); +#endif + + /* If we haven't already used up our alotted time, sleep to avoid + changing the colormap too fast. */ + { + long diff = (((now.tv_sec - then.tv_sec) * 1000000) + + now.tv_usec - then.tv_usec); + then.tv_sec = now.tv_sec; + then.tv_usec = now.tv_usec; + if (usecs_per_step > diff) + usleep (usecs_per_step - diff); + } + } + } + + + DONE: + + if (out_p && black_windows) + { + for (screen = 0; screen < nscreens; screen++) + { + if (clear_windows) + XClearWindow (dpy, black_windows[screen]); + XMapRaised (dpy, black_windows[screen]); + } + XSync(dpy, False); + } + + /* I can't explain this; without this delay, we get a flicker. + I suppose there's some lossage with stale bits being in the + hardware frame buffer or something, and this delay gives it + time to flush out. This sucks! */ + usleep(100000); /* 1/10th second */ + + for (screen = 0; screen < nscreens; screen++) + whack_gamma(dpy, screen, &info[screen], 1.0); + XSync(dpy, False); + + status = 0; + + FAIL: + for (screen = 0; screen < nscreens; screen++) + { + if (info[screen].red1) free (info[screen].red1); + if (info[screen].green1) free (info[screen].green1); + if (info[screen].blue1) free (info[screen].blue1); + if (info[screen].red2) free (info[screen].red2); + if (info[screen].green2) free (info[screen].green2); + if (info[screen].blue2) free (info[screen].blue2); + } + free(info); + + return status; +} + +static void +whack_gamma(Display *dpy, int screen, struct screen_gamma_info *info, + float ratio) +{ + int k; + + if (ratio < 0) ratio = 0; + if (ratio > 1) ratio = 1; + for (k = 0; k < info->gamma_size; k++) + { + info->red2[k] = info->red1[k] * ratio; + info->green2[k] = info->green1[k] * ratio; + info->blue2[k] = info->blue1[k] * ratio; + } + + XSGIvcStoreGammaColors16(dpy, screen, info->gamma_map, info->nred, + XSGIVC_MComponentRed, info->red2); + XSGIvcStoreGammaColors16(dpy, screen, info->gamma_map, info->ngreen, + XSGIVC_MComponentGreen, info->green2); + XSGIvcStoreGammaColors16(dpy, screen, info->gamma_map, info->nblue, + XSGIVC_MComponentBlue, info->blue2); + XSync(dpy, False); +} + +#endif /* HAVE_SGI_VC_EXTENSION */ + + -char *progclass = "foo"; +#if 0 +#include "screenhack.h" +char *progclass = "foo"; char *defaults [] = { 0 }; @@ -141,24 +596,24 @@ screenhack (dpy, w) Display *dpy; Window w; { - Colormap cmap = DefaultColormap (dpy, DefaultScreen (dpy)); - Colormap cmap2 = copy_colormap (dpy, cmap, 0); - - int seconds = 1; - int ticks = 30 * seconds; + int seconds = 3; + int ticks = 20; int delay = 1; while (1) { XSync (dpy, False); - XGrabServer (dpy); - XInstallColormap (dpy, cmap2); - fade_colormap (dpy, cmap, cmap2, seconds, ticks, True); + + fprintf(stderr,"out..."); fflush(stderr); + fade_screens (dpy, 0, seconds, ticks, True); + fprintf(stderr, "done.\n"); fflush(stderr); + if (delay) sleep (delay); - fade_colormap (dpy, cmap, cmap2, seconds, ticks, False); - XInstallColormap (dpy, cmap); - XUngrabServer (dpy); - XSync (dpy, False); + + fprintf(stderr,"in..."); fflush(stderr); + fade_screens (dpy, 0, seconds, ticks, False); + fprintf(stderr, "done.\n"); fflush(stderr); + if (delay) sleep (delay); } }