-/* xscreensaver, Copyright (c) 1992-1997 Jamie Zawinski <jwz@netscape.com>
+/* xscreensaver, Copyright (c) 1992-2008 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
#include "usleep.h"
#include "fade.h"
-
Colormap
copy_colormap (Screen *screen, Visual *visual,
Colormap cmap, Colormap into_cmap)
static void fade_screens_1 (Display *dpy, Colormap *cmaps,
- Window *black_windows, int seconds, int ticks,
+ Window *black_windows, int nwindows,
+ 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,
+ Window *black_windows, int nwindows,
+ int seconds, int ticks,
Bool out_p, Bool clear_windows);
#endif /* HAVE_SGI_VC_EXTENSION */
+#ifdef HAVE_XF86VMODE_GAMMA
+static int xf86_gamma_fade (Display *dpy,
+ Window *black_windows, int nwindows,
+ int seconds, int ticks,
+ Bool out_p, Bool clear_windows);
+#endif /* HAVE_XF86VMODE_GAMMA */
void
-fade_screens (Display *dpy, Colormap *cmaps, Window *black_windows,
+fade_screens (Display *dpy, Colormap *cmaps,
+ Window *black_windows, int nwindows,
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:
+
+/* #### printf("\n\nfade_screens %d %d %d\n", seconds, ticks, out_p); */
+
#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,
+ if (0 == sgi_gamma_fade(dpy, black_windows, nwindows,
+ seconds, ticks, out_p,
clear_windows))
+ ;
+ else
#endif /* HAVE_SGI_VC_EXTENSION */
+
+#ifdef HAVE_XF86VMODE_GAMMA
+ /* Then try to do it by fading the gamma in an XFree86-specific way... */
+ if (0 == xf86_gamma_fade(dpy, black_windows, nwindows,
+ seconds, ticks, out_p,
+ clear_windows))
+ ;
+ else
+#endif /* HAVE_XF86VMODE_GAMMA */
+
/* 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,
+ fade_screens_1 (dpy, cmaps, black_windows, nwindows,
+ 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)
+ {
+ was_in_p = False;
+ out_p = False;
+ seconds = oseconds * 2 / 3;
+ if (seconds == 0)
+ seconds = 1;
+ goto AGAIN;
+ }
}
+static void
+sleep_from (struct timeval *now, struct timeval *then, long usecs_per_step)
+{
+ /* If several seconds have passed, the machine must have been asleep
+ or thrashing or something. Don't sleep in that case, to avoid
+ overflowing and sleeping for an unconscionably long time. This
+ function should only be sleeping for very short periods.
+ */
+ if (now->tv_sec - then->tv_sec < 5)
+ {
+ long diff = (((now->tv_sec - then->tv_sec) * 1000000) +
+ now->tv_usec - then->tv_usec);
+ if (usecs_per_step > diff)
+ usleep (usecs_per_step - diff);
+ }
+
+ then->tv_sec = now->tv_sec;
+ then->tv_usec = now->tv_usec;
+}
+
+
+
/* 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
+ simultaneously. 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
+ the Matrox Millennium 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
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,
+fade_screens_1 (Display *dpy, Colormap *cmaps,
+ Window *black_windows, int nwindows,
int seconds, int ticks,
Bool out_p, Bool clear_windows)
{
installed = True;
if (black_windows && !out_p)
- for (j = 0; j < nscreens; j++)
+ for (j = 0; j < nwindows; j++)
if (black_windows[j])
{
XUnmapWindow (dpy, black_windows[j]);
/* 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);
- }
+ sleep_from (&now, &then, usecs_per_step);
}
DONE:
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]);
- }
-
+ {
+ for (i = 0; i < nwindows; 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.)
}
+\f
+/* SGI Gamma fading */
+
#ifdef HAVE_SGI_VC_EXTENSION
# include <X11/extensions/XSGIvc.h>
-struct screen_gamma_info {
+struct screen_sgi_gamma_info {
int gamma_map; /* ??? always using 0 */
int nred, ngreen, nblue;
unsigned short *red1, *green1, *blue1;
};
-static void whack_gamma(Display *dpy, int screen,
- struct screen_gamma_info *info, float ratio);
+static void sgi_whack_gamma(Display *dpy, int screen,
+ struct screen_sgi_gamma_info *info, float ratio);
static int
sgi_gamma_fade (Display *dpy,
- Window *black_windows, int seconds, int ticks,
+ Window *black_windows, int nwindows,
+ int seconds, int ticks,
Bool out_p, Bool clear_windows)
{
int steps = seconds * ticks;
#endif
int i, screen;
int status = -1;
- struct screen_gamma_info *info = (struct screen_gamma_info *)
+ struct screen_sgi_gamma_info *info = (struct screen_sgi_gamma_info *)
calloc(nscreens, sizeof(*info));
/* Get the current gamma maps for all screens.
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);
+ {
+ for (screen = 0; screen < nscreens; screen++)
+ sgi_whack_gamma(dpy, screen, &info[screen], 0.0);
+
+ for (screen = 0; screen < nwindows; screen++)
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);
{
for (screen = 0; screen < nscreens; screen++)
{
- whack_gamma(dpy, screen, &info[screen],
- (((float)i) / ((float)steps)));
+ sgi_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
/* 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);
- }
+ sleep_from (&now, &then, usecs_per_step);
}
}
if (out_p && black_windows)
{
- for (screen = 0; screen < nscreens; screen++)
+ for (screen = 0; screen < nwindows; screen++)
{
if (clear_windows)
- XClearWindow (dpy, black_windows[i]);
- XMapRaised (dpy, black_windows[i]);
+ 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);
+ sgi_whack_gamma(dpy, screen, &info[screen], 1.0);
XSync(dpy, False);
status = 0;
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)
+sgi_whack_gamma(Display *dpy, int screen, struct screen_sgi_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->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,
#endif /* HAVE_SGI_VC_EXTENSION */
-
\f
-#if 0
-#include "screenhack.h"
+/* XFree86 4.x+ Gamma fading */
-char *progclass = "foo";
-char *defaults [] = {
- 0
-};
+#ifdef HAVE_XF86VMODE_GAMMA
-XrmOptionDescRec options [] = {0};
-int options_size = 0;
+#include <X11/extensions/xf86vmode.h>
-void
-screenhack (dpy, w)
- Display *dpy;
- Window w;
+typedef struct {
+ XF86VidModeGamma vmg;
+ int size;
+ unsigned short *r, *g, *b;
+} xf86_gamma_info;
+
+static int xf86_check_gamma_extension (Display *dpy);
+static Bool xf86_whack_gamma (Display *dpy, int screen,
+ xf86_gamma_info *ginfo, float ratio);
+
+static int
+xf86_gamma_fade (Display *dpy,
+ Window *black_windows, int nwindows,
+ int seconds, int ticks,
+ Bool out_p, Bool clear_windows)
{
- int seconds = 3;
- int ticks = 20;
- int delay = 1;
+ 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;
+ xf86_gamma_info *info = 0;
+
+ static int ext_ok = -1;
+
+ /* Only probe the extension once: the answer isn't going to change. */
+ if (ext_ok == -1)
+ ext_ok = xf86_check_gamma_extension (dpy);
- while (1)
+ /* If this server doesn't have the gamma extension, bug out. */
+ if (ext_ok == 0)
+ goto FAIL;
+
+# ifndef HAVE_XF86VMODE_GAMMA_RAMP
+ if (ext_ok == 2) ext_ok = 1; /* server is newer than client! */
+# endif
+
+ info = (xf86_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++)
{
- XSync (dpy, False);
+ if (ext_ok == 1) /* only have gamma parameter, not ramps. */
+ {
+ if (!XF86VidModeGetGamma(dpy, screen, &info[screen].vmg))
+ goto FAIL;
+ }
+# ifdef HAVE_XF86VMODE_GAMMA_RAMP
+ else if (ext_ok == 2) /* have ramps */
+ {
+ if (!XF86VidModeGetGammaRampSize(dpy, screen, &info[screen].size))
+ goto FAIL;
+ if (info[screen].size <= 0)
+ goto FAIL;
+
+ info[screen].r = (unsigned short *)
+ calloc(info[screen].size, sizeof(unsigned short));
+ info[screen].g = (unsigned short *)
+ calloc(info[screen].size, sizeof(unsigned short));
+ info[screen].b = (unsigned short *)
+ calloc(info[screen].size, sizeof(unsigned short));
+
+ if (!(info[screen].r && info[screen].g && info[screen].b))
+ goto FAIL;
+
+ if (!XF86VidModeGetGammaRamp(dpy, screen, info[screen].size,
+ info[screen].r,
+ info[screen].g,
+ info[screen].b))
+ goto FAIL;
+ }
+# endif /* HAVE_XF86VMODE_GAMMA_RAMP */
+ else
+ abort();
+ }
- fprintf(stderr,"out..."); fflush(stderr);
- fade_screens (dpy, 0, seconds, ticks, True);
- fprintf(stderr, "done.\n"); fflush(stderr);
+#ifdef GETTIMEOFDAY_TWO_ARGS
+ gettimeofday(&then, &tzp);
+#else
+ gettimeofday(&then);
+#endif
- if (delay) sleep (delay);
+ /* 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++)
+ xf86_whack_gamma(dpy, screen, &info[screen], 0.0);
+ for (screen = 0; screen < nwindows; screen++)
+ if (black_windows && black_windows[screen])
+ {
+ XUnmapWindow (dpy, black_windows[screen]);
+ XClearWindow (dpy, black_windows[screen]);
+ XSync(dpy, False);
+ }
+ }
- fprintf(stderr,"in..."); fflush(stderr);
- fade_screens (dpy, 0, seconds, ticks, False);
- fprintf(stderr, "done.\n"); fflush(stderr);
+ /* 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++)
+ {
+ xf86_whack_gamma(dpy, screen, &info[screen],
+ (((float)i) / ((float)steps)));
- if (delay) sleep (delay);
+ /* 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. */
+ sleep_from (&now, &then, usecs_per_step);
+ }
+ }
+
+
+ DONE:
+
+ if (out_p && black_windows)
+ {
+ for (screen = 0; screen < nwindows; 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++)
+ xf86_whack_gamma(dpy, screen, &info[screen], 1.0);
+ XSync(dpy, False);
+
+ status = 0;
+
+ FAIL:
+ if (info)
+ {
+ for (screen = 0; screen < nscreens; screen++)
+ {
+ if (info[screen].r) free(info[screen].r);
+ if (info[screen].g) free(info[screen].g);
+ if (info[screen].b) free(info[screen].b);
+ }
+ free(info);
+ }
+
+ return status;
}
-#endif
+
+/* This bullshit is needed because the VidMode extension doesn't work
+ on remote displays -- but if the remote display has the extension
+ at all, XF86VidModeQueryExtension returns true, and then
+ XF86VidModeQueryVersion dies with an X error. Thank you XFree,
+ may I have another.
+ */
+
+static Bool error_handler_hit_p = False;
+
+static int
+ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error)
+{
+ error_handler_hit_p = True;
+ return 0;
+}
+
+static Bool
+safe_XF86VidModeQueryVersion (Display *dpy, int *majP, int *minP)
+{
+ Bool result;
+ XErrorHandler old_handler;
+ XSync (dpy, False);
+ error_handler_hit_p = False;
+ old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
+
+ result = XF86VidModeQueryVersion (dpy, majP, minP);
+
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ XSync (dpy, False);
+
+ return (error_handler_hit_p
+ ? False
+ : result);
+}
+
+
+
+/* VidModeExtension version 2.0 or better is needed to do gamma.
+ 2.0 added gamma values; 2.1 added gamma ramps.
+ */
+# define XF86_VIDMODE_GAMMA_MIN_MAJOR 2
+# define XF86_VIDMODE_GAMMA_MIN_MINOR 0
+# define XF86_VIDMODE_GAMMA_RAMP_MIN_MAJOR 2
+# define XF86_VIDMODE_GAMMA_RAMP_MIN_MINOR 1
+
+
+
+/* Returns 0 if gamma fading not available; 1 if only gamma value setting
+ is available; 2 if gamma ramps are available.
+ */
+static int
+xf86_check_gamma_extension (Display *dpy)
+{
+ int event, error, major, minor;
+
+ if (!XF86VidModeQueryExtension (dpy, &event, &error))
+ return 0; /* display doesn't have the extension. */
+
+ if (!safe_XF86VidModeQueryVersion (dpy, &major, &minor))
+ return 0; /* unable to get version number? */
+
+ if (major < XF86_VIDMODE_GAMMA_MIN_MAJOR ||
+ (major == XF86_VIDMODE_GAMMA_MIN_MAJOR &&
+ minor < XF86_VIDMODE_GAMMA_MIN_MINOR))
+ return 0; /* extension is too old for gamma. */
+
+ if (major < XF86_VIDMODE_GAMMA_RAMP_MIN_MAJOR ||
+ (major == XF86_VIDMODE_GAMMA_RAMP_MIN_MAJOR &&
+ minor < XF86_VIDMODE_GAMMA_RAMP_MIN_MINOR))
+ return 1; /* extension is too old for gamma ramps. */
+
+ /* Copacetic */
+ return 2;
+}
+
+
+/* XFree doesn't let you set gamma to a value smaller than this.
+ Apparently they didn't anticipate the trick I'm doing here...
+ */
+#define XF86_MIN_GAMMA 0.1
+
+
+static Bool
+xf86_whack_gamma(Display *dpy, int screen, xf86_gamma_info *info,
+ float ratio)
+{
+ Bool status;
+
+ if (ratio < 0) ratio = 0;
+ if (ratio > 1) ratio = 1;
+
+ if (info->size == 0) /* we only have a gamma number, not a ramp. */
+ {
+ XF86VidModeGamma g2;
+
+ g2.red = info->vmg.red * ratio;
+ g2.green = info->vmg.green * ratio;
+ g2.blue = info->vmg.blue * ratio;
+
+# ifdef XF86_MIN_GAMMA
+ if (g2.red < XF86_MIN_GAMMA) g2.red = XF86_MIN_GAMMA;
+ if (g2.green < XF86_MIN_GAMMA) g2.green = XF86_MIN_GAMMA;
+ if (g2.blue < XF86_MIN_GAMMA) g2.blue = XF86_MIN_GAMMA;
+# endif
+
+ status = XF86VidModeSetGamma (dpy, screen, &g2);
+ }
+ else
+ {
+# ifdef HAVE_XF86VMODE_GAMMA_RAMP
+
+ unsigned short *r, *g, *b;
+ int i;
+ r = (unsigned short *) malloc(info->size * sizeof(unsigned short));
+ g = (unsigned short *) malloc(info->size * sizeof(unsigned short));
+ b = (unsigned short *) malloc(info->size * sizeof(unsigned short));
+
+ for (i = 0; i < info->size; i++)
+ {
+ r[i] = info->r[i] * ratio;
+ g[i] = info->g[i] * ratio;
+ b[i] = info->b[i] * ratio;
+ }
+
+ status = XF86VidModeSetGammaRamp(dpy, screen, info->size, r, g, b);
+
+ free (r);
+ free (g);
+ free (b);
+
+# else /* !HAVE_XF86VMODE_GAMMA_RAMP */
+ abort();
+# endif /* !HAVE_XF86VMODE_GAMMA_RAMP */
+ }
+
+ XSync(dpy, False);
+ return status;
+}
+
+#endif /* HAVE_XF86VMODE_GAMMA */
projects / xscreensaver / blobdiff