| 1 | /* xscreensaver, Copyright (c) 1992-2011 Jamie Zawinski <jwz@jwz.org> |
| 2 | * |
| 3 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 4 | * documentation for any purpose is hereby granted without fee, provided that |
| 5 | * the above copyright notice appear in all copies and that both that |
| 6 | * copyright notice and this permission notice appear in supporting |
| 7 | * documentation. No representations are made about the suitability of this |
| 8 | * software for any purpose. It is provided "as is" without express or |
| 9 | * implied warranty. |
| 10 | */ |
| 11 | |
| 12 | #include "utils.h" |
| 13 | |
| 14 | #include <sys/time.h> /* for gettimeofday() */ |
| 15 | |
| 16 | #ifdef VMS |
| 17 | # include "vms-gtod.h" |
| 18 | #endif /* VMS */ |
| 19 | |
| 20 | #include "visual.h" |
| 21 | #include "usleep.h" |
| 22 | #include "fade.h" |
| 23 | |
| 24 | Colormap |
| 25 | copy_colormap (Screen *screen, Visual *visual, |
| 26 | Colormap cmap, Colormap into_cmap) |
| 27 | { |
| 28 | int i; |
| 29 | Display *dpy = DisplayOfScreen (screen); |
| 30 | Window window = RootWindowOfScreen (screen); |
| 31 | int ncolors = CellsOfScreen (screen); |
| 32 | XColor *colors = 0; |
| 33 | |
| 34 | /* If this is a colormap on a mono visual, or one with insanely many |
| 35 | color cells, bug out. */ |
| 36 | if (ncolors <= 2 || ncolors > 4096) |
| 37 | return 0; |
| 38 | /* If this is a non-writable visual, bug out. */ |
| 39 | if (!has_writable_cells (screen, visual)) |
| 40 | return 0; |
| 41 | |
| 42 | if (! into_cmap) |
| 43 | into_cmap = XCreateColormap (dpy, window, visual, AllocAll); |
| 44 | if (! cmap) |
| 45 | cmap = DefaultColormapOfScreen (screen); |
| 46 | |
| 47 | colors = (XColor *) calloc(sizeof(XColor), ncolors); |
| 48 | for (i = 0; i < ncolors; i++) |
| 49 | colors [i].pixel = i; |
| 50 | XQueryColors (dpy, cmap, colors, ncolors); |
| 51 | XStoreColors (dpy, into_cmap, colors, ncolors); |
| 52 | free (colors); |
| 53 | return into_cmap; |
| 54 | } |
| 55 | |
| 56 | |
| 57 | void |
| 58 | blacken_colormap (Screen *screen, Colormap cmap) |
| 59 | { |
| 60 | Display *dpy = DisplayOfScreen (screen); |
| 61 | int ncolors = CellsOfScreen (screen); |
| 62 | XColor *colors; |
| 63 | int i; |
| 64 | if (ncolors > 4096) |
| 65 | return; |
| 66 | colors = (XColor *) calloc(sizeof(XColor), ncolors); |
| 67 | for (i = 0; i < ncolors; i++) |
| 68 | colors[i].pixel = i; |
| 69 | XStoreColors (dpy, cmap, colors, ncolors); |
| 70 | free (colors); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | |
| 75 | static void fade_screens_1 (Display *dpy, Colormap *cmaps, |
| 76 | Window *black_windows, int nwindows, |
| 77 | int seconds, int ticks, |
| 78 | Bool out_p, Bool clear_windows); |
| 79 | |
| 80 | #ifdef HAVE_SGI_VC_EXTENSION |
| 81 | static int sgi_gamma_fade (Display *dpy, |
| 82 | Window *black_windows, int nwindows, |
| 83 | int seconds, int ticks, |
| 84 | Bool out_p, Bool clear_windows); |
| 85 | #endif /* HAVE_SGI_VC_EXTENSION */ |
| 86 | |
| 87 | #ifdef HAVE_XF86VMODE_GAMMA |
| 88 | static int xf86_gamma_fade (Display *dpy, |
| 89 | Window *black_windows, int nwindows, |
| 90 | int seconds, int ticks, |
| 91 | Bool out_p, Bool clear_windows); |
| 92 | #endif /* HAVE_XF86VMODE_GAMMA */ |
| 93 | |
| 94 | |
| 95 | void |
| 96 | fade_screens (Display *dpy, Colormap *cmaps, |
| 97 | Window *black_windows, int nwindows, |
| 98 | int seconds, int ticks, |
| 99 | Bool out_p, Bool clear_windows) |
| 100 | { |
| 101 | int oseconds = seconds; |
| 102 | Bool was_in_p = !out_p; |
| 103 | |
| 104 | /* When we're asked to fade in, first fade out, then fade in. |
| 105 | That way all the transitions are smooth -- from what's on the |
| 106 | screen, to black, to the desktop. |
| 107 | */ |
| 108 | if (was_in_p) |
| 109 | { |
| 110 | clear_windows = True; |
| 111 | out_p = True; |
| 112 | seconds /= 3; |
| 113 | if (seconds == 0) |
| 114 | seconds = 1; |
| 115 | } |
| 116 | |
| 117 | AGAIN: |
| 118 | |
| 119 | /* #### printf("\n\nfade_screens %d %d %d\n", seconds, ticks, out_p); */ |
| 120 | |
| 121 | #ifdef HAVE_SGI_VC_EXTENSION |
| 122 | /* First try to do it by fading the gamma in an SGI-specific way... */ |
| 123 | if (0 == sgi_gamma_fade(dpy, black_windows, nwindows, |
| 124 | seconds, ticks, out_p, |
| 125 | clear_windows)) |
| 126 | ; |
| 127 | else |
| 128 | #endif /* HAVE_SGI_VC_EXTENSION */ |
| 129 | |
| 130 | #ifdef HAVE_XF86VMODE_GAMMA |
| 131 | /* Then try to do it by fading the gamma in an XFree86-specific way... */ |
| 132 | if (0 == xf86_gamma_fade(dpy, black_windows, nwindows, |
| 133 | seconds, ticks, out_p, |
| 134 | clear_windows)) |
| 135 | ; |
| 136 | else |
| 137 | #endif /* HAVE_XF86VMODE_GAMMA */ |
| 138 | |
| 139 | /* Else, do it the old-fashioned way, which (somewhat) loses if |
| 140 | there are TrueColor windows visible. */ |
| 141 | fade_screens_1 (dpy, cmaps, black_windows, nwindows, |
| 142 | seconds, ticks, |
| 143 | out_p, clear_windows); |
| 144 | |
| 145 | /* If we were supposed to be fading in, do so now (we just faded out, |
| 146 | so now fade back in.) |
| 147 | */ |
| 148 | if (was_in_p) |
| 149 | { |
| 150 | was_in_p = False; |
| 151 | out_p = False; |
| 152 | seconds = oseconds * 2 / 3; |
| 153 | if (seconds == 0) |
| 154 | seconds = 1; |
| 155 | goto AGAIN; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | |
| 160 | static void |
| 161 | sleep_from (struct timeval *now, struct timeval *then, long usecs_per_step) |
| 162 | { |
| 163 | /* If several seconds have passed, the machine must have been asleep |
| 164 | or thrashing or something. Don't sleep in that case, to avoid |
| 165 | overflowing and sleeping for an unconscionably long time. This |
| 166 | function should only be sleeping for very short periods. |
| 167 | */ |
| 168 | if (now->tv_sec - then->tv_sec < 5) |
| 169 | { |
| 170 | long diff = (((now->tv_sec - then->tv_sec) * 1000000) + |
| 171 | now->tv_usec - then->tv_usec); |
| 172 | if (usecs_per_step > diff) |
| 173 | usleep (usecs_per_step - diff); |
| 174 | } |
| 175 | |
| 176 | then->tv_sec = now->tv_sec; |
| 177 | then->tv_usec = now->tv_usec; |
| 178 | } |
| 179 | |
| 180 | |
| 181 | |
| 182 | /* The business with `cmaps_per_screen' is to fake out the SGI 8-bit video |
| 183 | hardware, which is capable of installing multiple (4) colormaps |
| 184 | simultaneously. We have to install multiple copies of the same set of |
| 185 | colors in order to fill up all the available slots in the hardware color |
| 186 | lookup table, so we install an extra N colormaps per screen to make sure |
| 187 | that all screens really go black. |
| 188 | |
| 189 | I'm told that this trick also works with XInside's AcceleratedX when using |
| 190 | the Matrox Millennium card (which also allows multiple PseudoColor and |
| 191 | TrueColor visuals to co-exist and display properly at the same time.) |
| 192 | |
| 193 | This trick works ok on the 24-bit Indy video hardware, but doesn't work at |
| 194 | all on the O2 24-bit hardware. I guess the higher-end hardware is too |
| 195 | "good" for this to work (dammit.) So... I figured out the "right" way to |
| 196 | do this on SGIs, which is to ramp the monitor's gamma down to 0. That's |
| 197 | what is implemented in sgi_gamma_fade(), so we use that if we can. |
| 198 | */ |
| 199 | static void |
| 200 | fade_screens_1 (Display *dpy, Colormap *cmaps, |
| 201 | Window *black_windows, int nwindows, |
| 202 | int seconds, int ticks, |
| 203 | Bool out_p, Bool clear_windows) |
| 204 | { |
| 205 | int i, j, k; |
| 206 | int steps = seconds * ticks; |
| 207 | long usecs_per_step = (long)(seconds * 1000000) / (long)steps; |
| 208 | XEvent dummy_event; |
| 209 | int cmaps_per_screen = 5; |
| 210 | int nscreens = ScreenCount(dpy); |
| 211 | int ncmaps = nscreens * cmaps_per_screen; |
| 212 | Colormap *fade_cmaps = 0; |
| 213 | Bool installed = False; |
| 214 | int total_ncolors; |
| 215 | XColor *orig_colors, *current_colors, *screen_colors, *orig_screen_colors; |
| 216 | struct timeval then, now; |
| 217 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 218 | struct timezone tzp; |
| 219 | #endif |
| 220 | |
| 221 | total_ncolors = 0; |
| 222 | for (i = 0; i < nscreens; i++) |
| 223 | total_ncolors += CellsOfScreen (ScreenOfDisplay(dpy, i)); |
| 224 | |
| 225 | orig_colors = (XColor *) calloc(sizeof(XColor), total_ncolors); |
| 226 | current_colors = (XColor *) calloc(sizeof(XColor), total_ncolors); |
| 227 | |
| 228 | /* Get the contents of the colormap we are fading from or to. */ |
| 229 | screen_colors = orig_colors; |
| 230 | for (i = 0; i < nscreens; i++) |
| 231 | { |
| 232 | int ncolors = CellsOfScreen (ScreenOfDisplay (dpy, i)); |
| 233 | Colormap cmap = (cmaps ? cmaps[i] : 0); |
| 234 | if (!cmap) cmap = DefaultColormap(dpy, i); |
| 235 | |
| 236 | for (j = 0; j < ncolors; j++) |
| 237 | screen_colors[j].pixel = j; |
| 238 | XQueryColors (dpy, cmap, screen_colors, ncolors); |
| 239 | |
| 240 | screen_colors += ncolors; |
| 241 | } |
| 242 | |
| 243 | memcpy (current_colors, orig_colors, total_ncolors * sizeof (XColor)); |
| 244 | |
| 245 | |
| 246 | /* Make the writable colormaps (we keep these around and reuse them.) */ |
| 247 | if (!fade_cmaps) |
| 248 | { |
| 249 | fade_cmaps = (Colormap *) calloc(sizeof(Colormap), ncmaps); |
| 250 | for (i = 0; i < nscreens; i++) |
| 251 | { |
| 252 | Visual *v = DefaultVisual(dpy, i); |
| 253 | Screen *s = ScreenOfDisplay(dpy, i); |
| 254 | if (has_writable_cells (s, v)) |
| 255 | for (j = 0; j < cmaps_per_screen; j++) |
| 256 | fade_cmaps[(i * cmaps_per_screen) + j] = |
| 257 | XCreateColormap (dpy, RootWindowOfScreen (s), v, AllocAll); |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 262 | gettimeofday(&then, &tzp); |
| 263 | #else |
| 264 | gettimeofday(&then); |
| 265 | #endif |
| 266 | |
| 267 | /* Iterate by steps of the animation... */ |
| 268 | for (i = (out_p ? steps : 0); |
| 269 | (out_p ? i > 0 : i < steps); |
| 270 | (out_p ? i-- : i++)) |
| 271 | { |
| 272 | |
| 273 | /* For each screen, compute the current value of each color... |
| 274 | */ |
| 275 | orig_screen_colors = orig_colors; |
| 276 | screen_colors = current_colors; |
| 277 | for (j = 0; j < nscreens; j++) |
| 278 | { |
| 279 | int ncolors = CellsOfScreen (ScreenOfDisplay (dpy, j)); |
| 280 | for (k = 0; k < ncolors; k++) |
| 281 | { |
| 282 | /* This doesn't take into account the relative luminance of the |
| 283 | RGB components (0.299, 0.587, and 0.114 at gamma 2.2) but |
| 284 | the difference is imperceptible for this application... */ |
| 285 | screen_colors[k].red = orig_screen_colors[k].red * i / steps; |
| 286 | screen_colors[k].green = orig_screen_colors[k].green * i / steps; |
| 287 | screen_colors[k].blue = orig_screen_colors[k].blue * i / steps; |
| 288 | } |
| 289 | screen_colors += ncolors; |
| 290 | orig_screen_colors += ncolors; |
| 291 | } |
| 292 | |
| 293 | /* Put the colors into the maps... |
| 294 | */ |
| 295 | screen_colors = current_colors; |
| 296 | for (j = 0; j < nscreens; j++) |
| 297 | { |
| 298 | int ncolors = CellsOfScreen (ScreenOfDisplay (dpy, j)); |
| 299 | for (k = 0; k < cmaps_per_screen; k++) |
| 300 | { |
| 301 | Colormap c = fade_cmaps[j * cmaps_per_screen + k]; |
| 302 | if (c) |
| 303 | XStoreColors (dpy, c, screen_colors, ncolors); |
| 304 | } |
| 305 | screen_colors += ncolors; |
| 306 | } |
| 307 | |
| 308 | /* Put the maps on the screens, and then take the windows off the screen. |
| 309 | (only need to do this the first time through the loop.) |
| 310 | */ |
| 311 | if (!installed) |
| 312 | { |
| 313 | for (j = 0; j < ncmaps; j++) |
| 314 | if (fade_cmaps[j]) |
| 315 | XInstallColormap (dpy, fade_cmaps[j]); |
| 316 | installed = True; |
| 317 | |
| 318 | if (black_windows && !out_p) |
| 319 | for (j = 0; j < nwindows; j++) |
| 320 | if (black_windows[j]) |
| 321 | { |
| 322 | XUnmapWindow (dpy, black_windows[j]); |
| 323 | XClearWindow (dpy, black_windows[j]); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | XSync (dpy, False); |
| 328 | |
| 329 | /* If there is user activity, bug out. (Bug out on keypresses or |
| 330 | mouse presses, but not motion, and not release events. Bugging |
| 331 | out on motion made the unfade hack be totally useless, I think.) |
| 332 | |
| 333 | We put the event back so that the calling code can notice it too. |
| 334 | It would be better to not remove it at all, but that's harder |
| 335 | because Xlib has such a non-design for this kind of crap, and |
| 336 | in this application it doesn't matter if the events end up out |
| 337 | of order, so in the grand unix tradition we say "fuck it" and |
| 338 | do something that mostly works for the time being. |
| 339 | */ |
| 340 | if (XCheckMaskEvent (dpy, (KeyPressMask|ButtonPressMask), &dummy_event)) |
| 341 | { |
| 342 | XPutBackEvent (dpy, &dummy_event); |
| 343 | goto DONE; |
| 344 | } |
| 345 | |
| 346 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 347 | gettimeofday(&now, &tzp); |
| 348 | #else |
| 349 | gettimeofday(&now); |
| 350 | #endif |
| 351 | |
| 352 | /* If we haven't already used up our alotted time, sleep to avoid |
| 353 | changing the colormap too fast. */ |
| 354 | sleep_from (&now, &then, usecs_per_step); |
| 355 | } |
| 356 | |
| 357 | DONE: |
| 358 | |
| 359 | if (orig_colors) free (orig_colors); |
| 360 | if (current_colors) free (current_colors); |
| 361 | |
| 362 | /* If we've been given windows to raise after blackout, raise them before |
| 363 | releasing the colormaps. |
| 364 | */ |
| 365 | if (out_p && black_windows) |
| 366 | { |
| 367 | for (i = 0; i < nwindows; i++) |
| 368 | { |
| 369 | if (clear_windows) |
| 370 | XClearWindow (dpy, black_windows[i]); |
| 371 | XMapRaised (dpy, black_windows[i]); |
| 372 | } |
| 373 | XSync(dpy, False); |
| 374 | } |
| 375 | |
| 376 | /* Now put the target maps back. |
| 377 | If we're fading out, use the given cmap (or the default cmap, if none.) |
| 378 | If we're fading in, always use the default cmap. |
| 379 | */ |
| 380 | for (i = 0; i < nscreens; i++) |
| 381 | { |
| 382 | Colormap cmap = (cmaps ? cmaps[i] : 0); |
| 383 | if (!cmap || !out_p) |
| 384 | cmap = DefaultColormap(dpy, i); |
| 385 | XInstallColormap (dpy, cmap); |
| 386 | } |
| 387 | |
| 388 | /* The fade (in or out) is complete, so we don't need the black maps on |
| 389 | stage any more. |
| 390 | */ |
| 391 | for (i = 0; i < ncmaps; i++) |
| 392 | if (fade_cmaps[i]) |
| 393 | { |
| 394 | XUninstallColormap(dpy, fade_cmaps[i]); |
| 395 | XFreeColormap(dpy, fade_cmaps[i]); |
| 396 | fade_cmaps[i] = 0; |
| 397 | } |
| 398 | free(fade_cmaps); |
| 399 | fade_cmaps = 0; |
| 400 | } |
| 401 | |
| 402 | |
| 403 | \f |
| 404 | /* SGI Gamma fading */ |
| 405 | |
| 406 | #ifdef HAVE_SGI_VC_EXTENSION |
| 407 | |
| 408 | # include <X11/extensions/XSGIvc.h> |
| 409 | |
| 410 | struct screen_sgi_gamma_info { |
| 411 | int gamma_map; /* ??? always using 0 */ |
| 412 | int nred, ngreen, nblue; |
| 413 | unsigned short *red1, *green1, *blue1; |
| 414 | unsigned short *red2, *green2, *blue2; |
| 415 | int gamma_size; |
| 416 | int gamma_precision; |
| 417 | Bool alpha_p; |
| 418 | }; |
| 419 | |
| 420 | |
| 421 | static void sgi_whack_gamma(Display *dpy, int screen, |
| 422 | struct screen_sgi_gamma_info *info, float ratio); |
| 423 | |
| 424 | static int |
| 425 | sgi_gamma_fade (Display *dpy, |
| 426 | Window *black_windows, int nwindows, |
| 427 | int seconds, int ticks, |
| 428 | Bool out_p, Bool clear_windows) |
| 429 | { |
| 430 | int steps = seconds * ticks; |
| 431 | long usecs_per_step = (long)(seconds * 1000000) / (long)steps; |
| 432 | XEvent dummy_event; |
| 433 | int nscreens = ScreenCount(dpy); |
| 434 | struct timeval then, now; |
| 435 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 436 | struct timezone tzp; |
| 437 | #endif |
| 438 | int i, screen; |
| 439 | int status = -1; |
| 440 | struct screen_sgi_gamma_info *info = (struct screen_sgi_gamma_info *) |
| 441 | calloc(nscreens, sizeof(*info)); |
| 442 | |
| 443 | /* Get the current gamma maps for all screens. |
| 444 | Bug out and return -1 if we can't get them for some screen. |
| 445 | */ |
| 446 | for (screen = 0; screen < nscreens; screen++) |
| 447 | { |
| 448 | if (!XSGIvcQueryGammaMap(dpy, screen, info[screen].gamma_map, |
| 449 | &info[screen].gamma_size, |
| 450 | &info[screen].gamma_precision, |
| 451 | &info[screen].alpha_p)) |
| 452 | goto FAIL; |
| 453 | |
| 454 | if (!XSGIvcQueryGammaColors(dpy, screen, info[screen].gamma_map, |
| 455 | XSGIVC_COMPONENT_RED, |
| 456 | &info[screen].nred, &info[screen].red1)) |
| 457 | goto FAIL; |
| 458 | if (! XSGIvcQueryGammaColors(dpy, screen, info[screen].gamma_map, |
| 459 | XSGIVC_COMPONENT_GREEN, |
| 460 | &info[screen].ngreen, &info[screen].green1)) |
| 461 | goto FAIL; |
| 462 | if (!XSGIvcQueryGammaColors(dpy, screen, info[screen].gamma_map, |
| 463 | XSGIVC_COMPONENT_BLUE, |
| 464 | &info[screen].nblue, &info[screen].blue1)) |
| 465 | goto FAIL; |
| 466 | |
| 467 | if (info[screen].gamma_precision == 8) /* Scale it up to 16 bits. */ |
| 468 | { |
| 469 | int j; |
| 470 | for(j = 0; j < info[screen].nred; j++) |
| 471 | info[screen].red1[j] = |
| 472 | ((info[screen].red1[j] << 8) | info[screen].red1[j]); |
| 473 | for(j = 0; j < info[screen].ngreen; j++) |
| 474 | info[screen].green1[j] = |
| 475 | ((info[screen].green1[j] << 8) | info[screen].green1[j]); |
| 476 | for(j = 0; j < info[screen].nblue; j++) |
| 477 | info[screen].blue1[j] = |
| 478 | ((info[screen].blue1[j] << 8) | info[screen].blue1[j]); |
| 479 | } |
| 480 | |
| 481 | info[screen].red2 = (unsigned short *) |
| 482 | malloc(sizeof(*info[screen].red2) * (info[screen].nred+1)); |
| 483 | info[screen].green2 = (unsigned short *) |
| 484 | malloc(sizeof(*info[screen].green2) * (info[screen].ngreen+1)); |
| 485 | info[screen].blue2 = (unsigned short *) |
| 486 | malloc(sizeof(*info[screen].blue2) * (info[screen].nblue+1)); |
| 487 | } |
| 488 | |
| 489 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 490 | gettimeofday(&then, &tzp); |
| 491 | #else |
| 492 | gettimeofday(&then); |
| 493 | #endif |
| 494 | |
| 495 | /* If we're fading in (from black), then first crank the gamma all the |
| 496 | way down to 0, then take the windows off the screen. |
| 497 | */ |
| 498 | if (!out_p) |
| 499 | { |
| 500 | for (screen = 0; screen < nscreens; screen++) |
| 501 | sgi_whack_gamma(dpy, screen, &info[screen], 0.0); |
| 502 | |
| 503 | for (screen = 0; screen < nwindows; screen++) |
| 504 | if (black_windows && black_windows[screen]) |
| 505 | { |
| 506 | XUnmapWindow (dpy, black_windows[screen]); |
| 507 | XClearWindow (dpy, black_windows[screen]); |
| 508 | XSync(dpy, False); |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | /* Iterate by steps of the animation... */ |
| 513 | for (i = (out_p ? steps : 0); |
| 514 | (out_p ? i > 0 : i < steps); |
| 515 | (out_p ? i-- : i++)) |
| 516 | { |
| 517 | for (screen = 0; screen < nscreens; screen++) |
| 518 | { |
| 519 | sgi_whack_gamma(dpy, screen, &info[screen], |
| 520 | (((float)i) / ((float)steps))); |
| 521 | |
| 522 | /* If there is user activity, bug out. (Bug out on keypresses or |
| 523 | mouse presses, but not motion, and not release events. Bugging |
| 524 | out on motion made the unfade hack be totally useless, I think.) |
| 525 | |
| 526 | We put the event back so that the calling code can notice it too. |
| 527 | It would be better to not remove it at all, but that's harder |
| 528 | because Xlib has such a non-design for this kind of crap, and |
| 529 | in this application it doesn't matter if the events end up out |
| 530 | of order, so in the grand unix tradition we say "fuck it" and |
| 531 | do something that mostly works for the time being. |
| 532 | */ |
| 533 | if (XCheckMaskEvent (dpy, (KeyPressMask|ButtonPressMask), |
| 534 | &dummy_event)) |
| 535 | { |
| 536 | XPutBackEvent (dpy, &dummy_event); |
| 537 | goto DONE; |
| 538 | } |
| 539 | |
| 540 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 541 | gettimeofday(&now, &tzp); |
| 542 | #else |
| 543 | gettimeofday(&now); |
| 544 | #endif |
| 545 | |
| 546 | /* If we haven't already used up our alotted time, sleep to avoid |
| 547 | changing the colormap too fast. */ |
| 548 | sleep_from (&now, &then, usecs_per_step); |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | |
| 553 | DONE: |
| 554 | |
| 555 | if (out_p && black_windows) |
| 556 | { |
| 557 | for (screen = 0; screen < nwindows; screen++) |
| 558 | { |
| 559 | if (clear_windows) |
| 560 | XClearWindow (dpy, black_windows[screen]); |
| 561 | XMapRaised (dpy, black_windows[screen]); |
| 562 | } |
| 563 | XSync(dpy, False); |
| 564 | } |
| 565 | |
| 566 | /* I can't explain this; without this delay, we get a flicker. |
| 567 | I suppose there's some lossage with stale bits being in the |
| 568 | hardware frame buffer or something, and this delay gives it |
| 569 | time to flush out. This sucks! */ |
| 570 | usleep(100000); /* 1/10th second */ |
| 571 | |
| 572 | for (screen = 0; screen < nscreens; screen++) |
| 573 | sgi_whack_gamma(dpy, screen, &info[screen], 1.0); |
| 574 | XSync(dpy, False); |
| 575 | |
| 576 | status = 0; |
| 577 | |
| 578 | FAIL: |
| 579 | for (screen = 0; screen < nscreens; screen++) |
| 580 | { |
| 581 | if (info[screen].red1) free (info[screen].red1); |
| 582 | if (info[screen].green1) free (info[screen].green1); |
| 583 | if (info[screen].blue1) free (info[screen].blue1); |
| 584 | if (info[screen].red2) free (info[screen].red2); |
| 585 | if (info[screen].green2) free (info[screen].green2); |
| 586 | if (info[screen].blue2) free (info[screen].blue2); |
| 587 | } |
| 588 | free(info); |
| 589 | |
| 590 | return status; |
| 591 | } |
| 592 | |
| 593 | static void |
| 594 | sgi_whack_gamma(Display *dpy, int screen, struct screen_sgi_gamma_info *info, |
| 595 | float ratio) |
| 596 | { |
| 597 | int k; |
| 598 | |
| 599 | if (ratio < 0) ratio = 0; |
| 600 | if (ratio > 1) ratio = 1; |
| 601 | for (k = 0; k < info->gamma_size; k++) |
| 602 | { |
| 603 | info->red2[k] = info->red1[k] * ratio; |
| 604 | info->green2[k] = info->green1[k] * ratio; |
| 605 | info->blue2[k] = info->blue1[k] * ratio; |
| 606 | } |
| 607 | |
| 608 | XSGIvcStoreGammaColors16(dpy, screen, info->gamma_map, info->nred, |
| 609 | XSGIVC_MComponentRed, info->red2); |
| 610 | XSGIvcStoreGammaColors16(dpy, screen, info->gamma_map, info->ngreen, |
| 611 | XSGIVC_MComponentGreen, info->green2); |
| 612 | XSGIvcStoreGammaColors16(dpy, screen, info->gamma_map, info->nblue, |
| 613 | XSGIVC_MComponentBlue, info->blue2); |
| 614 | XSync(dpy, False); |
| 615 | } |
| 616 | |
| 617 | #endif /* HAVE_SGI_VC_EXTENSION */ |
| 618 | |
| 619 | |
| 620 | \f |
| 621 | /* XFree86 4.x+ Gamma fading */ |
| 622 | |
| 623 | #ifdef HAVE_XF86VMODE_GAMMA |
| 624 | |
| 625 | #include <X11/extensions/xf86vmode.h> |
| 626 | |
| 627 | typedef struct { |
| 628 | XF86VidModeGamma vmg; |
| 629 | int size; |
| 630 | unsigned short *r, *g, *b; |
| 631 | } xf86_gamma_info; |
| 632 | |
| 633 | static int xf86_check_gamma_extension (Display *dpy); |
| 634 | static Bool xf86_whack_gamma (Display *dpy, int screen, |
| 635 | xf86_gamma_info *ginfo, float ratio); |
| 636 | |
| 637 | static int |
| 638 | xf86_gamma_fade (Display *dpy, |
| 639 | Window *black_windows, int nwindows, |
| 640 | int seconds, int ticks, |
| 641 | Bool out_p, Bool clear_windows) |
| 642 | { |
| 643 | int steps = seconds * ticks; |
| 644 | long usecs_per_step = (long)(seconds * 1000000) / (long)steps; |
| 645 | XEvent dummy_event; |
| 646 | int nscreens = ScreenCount(dpy); |
| 647 | struct timeval then, now; |
| 648 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 649 | struct timezone tzp; |
| 650 | #endif |
| 651 | int i, screen; |
| 652 | int status = -1; |
| 653 | xf86_gamma_info *info = 0; |
| 654 | |
| 655 | static int ext_ok = -1; |
| 656 | |
| 657 | /* Only probe the extension once: the answer isn't going to change. */ |
| 658 | if (ext_ok == -1) |
| 659 | ext_ok = xf86_check_gamma_extension (dpy); |
| 660 | |
| 661 | /* If this server doesn't have the gamma extension, bug out. */ |
| 662 | if (ext_ok == 0) |
| 663 | goto FAIL; |
| 664 | |
| 665 | # ifndef HAVE_XF86VMODE_GAMMA_RAMP |
| 666 | if (ext_ok == 2) ext_ok = 1; /* server is newer than client! */ |
| 667 | # endif |
| 668 | |
| 669 | info = (xf86_gamma_info *) calloc(nscreens, sizeof(*info)); |
| 670 | |
| 671 | /* Get the current gamma maps for all screens. |
| 672 | Bug out and return -1 if we can't get them for some screen. |
| 673 | */ |
| 674 | for (screen = 0; screen < nscreens; screen++) |
| 675 | { |
| 676 | if (ext_ok == 1) /* only have gamma parameter, not ramps. */ |
| 677 | { |
| 678 | if (!XF86VidModeGetGamma(dpy, screen, &info[screen].vmg)) |
| 679 | goto FAIL; |
| 680 | } |
| 681 | # ifdef HAVE_XF86VMODE_GAMMA_RAMP |
| 682 | else if (ext_ok == 2) /* have ramps */ |
| 683 | { |
| 684 | if (!XF86VidModeGetGammaRampSize(dpy, screen, &info[screen].size)) |
| 685 | goto FAIL; |
| 686 | if (info[screen].size <= 0) |
| 687 | goto FAIL; |
| 688 | |
| 689 | info[screen].r = (unsigned short *) |
| 690 | calloc(info[screen].size, sizeof(unsigned short)); |
| 691 | info[screen].g = (unsigned short *) |
| 692 | calloc(info[screen].size, sizeof(unsigned short)); |
| 693 | info[screen].b = (unsigned short *) |
| 694 | calloc(info[screen].size, sizeof(unsigned short)); |
| 695 | |
| 696 | if (!(info[screen].r && info[screen].g && info[screen].b)) |
| 697 | goto FAIL; |
| 698 | |
| 699 | if (!XF86VidModeGetGammaRamp(dpy, screen, info[screen].size, |
| 700 | info[screen].r, |
| 701 | info[screen].g, |
| 702 | info[screen].b)) |
| 703 | goto FAIL; |
| 704 | } |
| 705 | # endif /* HAVE_XF86VMODE_GAMMA_RAMP */ |
| 706 | else |
| 707 | abort(); |
| 708 | } |
| 709 | |
| 710 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 711 | gettimeofday(&then, &tzp); |
| 712 | #else |
| 713 | gettimeofday(&then); |
| 714 | #endif |
| 715 | |
| 716 | /* If we're fading in (from black), then first crank the gamma all the |
| 717 | way down to 0, then take the windows off the screen. |
| 718 | */ |
| 719 | if (!out_p) |
| 720 | { |
| 721 | for (screen = 0; screen < nscreens; screen++) |
| 722 | xf86_whack_gamma(dpy, screen, &info[screen], 0.0); |
| 723 | for (screen = 0; screen < nwindows; screen++) |
| 724 | if (black_windows && black_windows[screen]) |
| 725 | { |
| 726 | XUnmapWindow (dpy, black_windows[screen]); |
| 727 | XClearWindow (dpy, black_windows[screen]); |
| 728 | XSync(dpy, False); |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | /* Iterate by steps of the animation... */ |
| 733 | for (i = (out_p ? steps : 0); |
| 734 | (out_p ? i > 0 : i < steps); |
| 735 | (out_p ? i-- : i++)) |
| 736 | { |
| 737 | for (screen = 0; screen < nscreens; screen++) |
| 738 | { |
| 739 | xf86_whack_gamma(dpy, screen, &info[screen], |
| 740 | (((float)i) / ((float)steps))); |
| 741 | |
| 742 | /* If there is user activity, bug out. (Bug out on keypresses or |
| 743 | mouse presses, but not motion, and not release events. Bugging |
| 744 | out on motion made the unfade hack be totally useless, I think.) |
| 745 | |
| 746 | We put the event back so that the calling code can notice it too. |
| 747 | It would be better to not remove it at all, but that's harder |
| 748 | because Xlib has such a non-design for this kind of crap, and |
| 749 | in this application it doesn't matter if the events end up out |
| 750 | of order, so in the grand unix tradition we say "fuck it" and |
| 751 | do something that mostly works for the time being. |
| 752 | */ |
| 753 | if (XCheckMaskEvent (dpy, (KeyPressMask|ButtonPressMask), |
| 754 | &dummy_event)) |
| 755 | { |
| 756 | XPutBackEvent (dpy, &dummy_event); |
| 757 | goto DONE; |
| 758 | } |
| 759 | |
| 760 | #ifdef GETTIMEOFDAY_TWO_ARGS |
| 761 | gettimeofday(&now, &tzp); |
| 762 | #else |
| 763 | gettimeofday(&now); |
| 764 | #endif |
| 765 | |
| 766 | /* If we haven't already used up our alotted time, sleep to avoid |
| 767 | changing the colormap too fast. */ |
| 768 | sleep_from (&now, &then, usecs_per_step); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | |
| 773 | DONE: |
| 774 | |
| 775 | if (out_p && black_windows) |
| 776 | { |
| 777 | for (screen = 0; screen < nwindows; screen++) |
| 778 | { |
| 779 | if (clear_windows) |
| 780 | XClearWindow (dpy, black_windows[screen]); |
| 781 | XMapRaised (dpy, black_windows[screen]); |
| 782 | } |
| 783 | XSync(dpy, False); |
| 784 | } |
| 785 | |
| 786 | /* I can't explain this; without this delay, we get a flicker. |
| 787 | I suppose there's some lossage with stale bits being in the |
| 788 | hardware frame buffer or something, and this delay gives it |
| 789 | time to flush out. This sucks! */ |
| 790 | usleep(100000); /* 1/10th second */ |
| 791 | |
| 792 | for (screen = 0; screen < nscreens; screen++) |
| 793 | xf86_whack_gamma(dpy, screen, &info[screen], 1.0); |
| 794 | XSync(dpy, False); |
| 795 | |
| 796 | status = 0; |
| 797 | |
| 798 | FAIL: |
| 799 | if (info) |
| 800 | { |
| 801 | for (screen = 0; screen < nscreens; screen++) |
| 802 | { |
| 803 | if (info[screen].r) free(info[screen].r); |
| 804 | if (info[screen].g) free(info[screen].g); |
| 805 | if (info[screen].b) free(info[screen].b); |
| 806 | } |
| 807 | free(info); |
| 808 | } |
| 809 | |
| 810 | return status; |
| 811 | } |
| 812 | |
| 813 | |
| 814 | /* This bullshit is needed because the VidMode extension doesn't work |
| 815 | on remote displays -- but if the remote display has the extension |
| 816 | at all, XF86VidModeQueryExtension returns true, and then |
| 817 | XF86VidModeQueryVersion dies with an X error. Thank you XFree, |
| 818 | may I have another. |
| 819 | */ |
| 820 | |
| 821 | static Bool error_handler_hit_p = False; |
| 822 | |
| 823 | static int |
| 824 | ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error) |
| 825 | { |
| 826 | error_handler_hit_p = True; |
| 827 | return 0; |
| 828 | } |
| 829 | |
| 830 | static Bool |
| 831 | safe_XF86VidModeQueryVersion (Display *dpy, int *majP, int *minP) |
| 832 | { |
| 833 | Bool result; |
| 834 | XErrorHandler old_handler; |
| 835 | XSync (dpy, False); |
| 836 | error_handler_hit_p = False; |
| 837 | old_handler = XSetErrorHandler (ignore_all_errors_ehandler); |
| 838 | |
| 839 | result = XF86VidModeQueryVersion (dpy, majP, minP); |
| 840 | |
| 841 | XSync (dpy, False); |
| 842 | XSetErrorHandler (old_handler); |
| 843 | XSync (dpy, False); |
| 844 | |
| 845 | return (error_handler_hit_p |
| 846 | ? False |
| 847 | : result); |
| 848 | } |
| 849 | |
| 850 | |
| 851 | |
| 852 | /* VidModeExtension version 2.0 or better is needed to do gamma. |
| 853 | 2.0 added gamma values; 2.1 added gamma ramps. |
| 854 | */ |
| 855 | # define XF86_VIDMODE_GAMMA_MIN_MAJOR 2 |
| 856 | # define XF86_VIDMODE_GAMMA_MIN_MINOR 0 |
| 857 | # define XF86_VIDMODE_GAMMA_RAMP_MIN_MAJOR 2 |
| 858 | # define XF86_VIDMODE_GAMMA_RAMP_MIN_MINOR 1 |
| 859 | |
| 860 | |
| 861 | |
| 862 | /* Returns 0 if gamma fading not available; 1 if only gamma value setting |
| 863 | is available; 2 if gamma ramps are available. |
| 864 | */ |
| 865 | static int |
| 866 | xf86_check_gamma_extension (Display *dpy) |
| 867 | { |
| 868 | int event, error, major, minor; |
| 869 | |
| 870 | if (!XF86VidModeQueryExtension (dpy, &event, &error)) |
| 871 | return 0; /* display doesn't have the extension. */ |
| 872 | |
| 873 | if (!safe_XF86VidModeQueryVersion (dpy, &major, &minor)) |
| 874 | return 0; /* unable to get version number? */ |
| 875 | |
| 876 | if (major < XF86_VIDMODE_GAMMA_MIN_MAJOR || |
| 877 | (major == XF86_VIDMODE_GAMMA_MIN_MAJOR && |
| 878 | minor < XF86_VIDMODE_GAMMA_MIN_MINOR)) |
| 879 | return 0; /* extension is too old for gamma. */ |
| 880 | |
| 881 | if (major < XF86_VIDMODE_GAMMA_RAMP_MIN_MAJOR || |
| 882 | (major == XF86_VIDMODE_GAMMA_RAMP_MIN_MAJOR && |
| 883 | minor < XF86_VIDMODE_GAMMA_RAMP_MIN_MINOR)) |
| 884 | return 1; /* extension is too old for gamma ramps. */ |
| 885 | |
| 886 | /* Copacetic */ |
| 887 | return 2; |
| 888 | } |
| 889 | |
| 890 | |
| 891 | /* XFree doesn't let you set gamma to a value smaller than this. |
| 892 | Apparently they didn't anticipate the trick I'm doing here... |
| 893 | */ |
| 894 | #define XF86_MIN_GAMMA 0.1 |
| 895 | |
| 896 | |
| 897 | static Bool |
| 898 | xf86_whack_gamma(Display *dpy, int screen, xf86_gamma_info *info, |
| 899 | float ratio) |
| 900 | { |
| 901 | Bool status; |
| 902 | |
| 903 | XErrorHandler old_handler; |
| 904 | XSync (dpy, False); |
| 905 | error_handler_hit_p = False; |
| 906 | old_handler = XSetErrorHandler (ignore_all_errors_ehandler); |
| 907 | |
| 908 | if (ratio < 0) ratio = 0; |
| 909 | if (ratio > 1) ratio = 1; |
| 910 | |
| 911 | if (info->size == 0) /* we only have a gamma number, not a ramp. */ |
| 912 | { |
| 913 | XF86VidModeGamma g2; |
| 914 | |
| 915 | g2.red = info->vmg.red * ratio; |
| 916 | g2.green = info->vmg.green * ratio; |
| 917 | g2.blue = info->vmg.blue * ratio; |
| 918 | |
| 919 | # ifdef XF86_MIN_GAMMA |
| 920 | if (g2.red < XF86_MIN_GAMMA) g2.red = XF86_MIN_GAMMA; |
| 921 | if (g2.green < XF86_MIN_GAMMA) g2.green = XF86_MIN_GAMMA; |
| 922 | if (g2.blue < XF86_MIN_GAMMA) g2.blue = XF86_MIN_GAMMA; |
| 923 | # endif |
| 924 | |
| 925 | status = XF86VidModeSetGamma (dpy, screen, &g2); |
| 926 | } |
| 927 | else |
| 928 | { |
| 929 | # ifdef HAVE_XF86VMODE_GAMMA_RAMP |
| 930 | |
| 931 | unsigned short *r, *g, *b; |
| 932 | int i; |
| 933 | r = (unsigned short *) malloc(info->size * sizeof(unsigned short)); |
| 934 | g = (unsigned short *) malloc(info->size * sizeof(unsigned short)); |
| 935 | b = (unsigned short *) malloc(info->size * sizeof(unsigned short)); |
| 936 | |
| 937 | for (i = 0; i < info->size; i++) |
| 938 | { |
| 939 | r[i] = info->r[i] * ratio; |
| 940 | g[i] = info->g[i] * ratio; |
| 941 | b[i] = info->b[i] * ratio; |
| 942 | } |
| 943 | |
| 944 | status = XF86VidModeSetGammaRamp(dpy, screen, info->size, r, g, b); |
| 945 | |
| 946 | free (r); |
| 947 | free (g); |
| 948 | free (b); |
| 949 | |
| 950 | # else /* !HAVE_XF86VMODE_GAMMA_RAMP */ |
| 951 | abort(); |
| 952 | # endif /* !HAVE_XF86VMODE_GAMMA_RAMP */ |
| 953 | } |
| 954 | |
| 955 | XSync (dpy, False); |
| 956 | XSetErrorHandler (old_handler); |
| 957 | XSync (dpy, False); |
| 958 | |
| 959 | return status; |
| 960 | } |
| 961 | |
| 962 | #endif /* HAVE_XF86VMODE_GAMMA */ |