1 /*
   2  * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 #include "splashscreen_impl.h"
  27 #include <X11/Xlib.h>
  28 #include <X11/Xutil.h>
  29 #include <X11/extensions/shape.h>
  30 #include <X11/Xmd.h>
  31 #include <X11/Xatom.h>
  32 #include <X11/cursorfont.h>
  33 #include <sys/types.h>
  34 #include <pthread.h>
  35 #include <signal.h>
  36 #include <unistd.h>
  37 #include <sys/time.h>
  38 #include <errno.h>
  39 #include <iconv.h>
  40 #include <langinfo.h>
  41 #include <locale.h>
  42 #include <fcntl.h>
  43 #include <poll.h>
  44 #include <sizecalc.h>
  45 #include "jni.h"
  46 
  47 static Bool shapeSupported;
  48 static int shapeEventBase, shapeErrorBase;
  49 
  50 void SplashRemoveDecoration(Splash * splash);
  51 
  52 
  53 /* Could use npt but decided to cut down on linked code size */
  54 char* SplashConvertStringAlloc(const char* in, int* size) {
  55     const char     *codeset;
  56     const char     *codeset_out;
  57     iconv_t         cd;
  58     size_t          rc;
  59     char           *buf = NULL, *out;
  60     size_t          bufSize, inSize, outSize;
  61     const char* old_locale;
  62 
  63     if (!in) {
  64         return NULL;
  65     }
  66     old_locale = setlocale(LC_ALL, "");
  67 
  68     codeset = nl_langinfo(CODESET);
  69     if ( codeset == NULL || codeset[0] == 0 ) {
  70         goto done;
  71     }
  72     /* we don't need BOM in output so we choose native BE or LE encoding here */
  73     codeset_out = (platformByteOrder()==BYTE_ORDER_MSBFIRST) ?
  74         "UCS-2BE" : "UCS-2LE";
  75 
  76     cd = iconv_open(codeset_out, codeset);
  77     if (cd == (iconv_t)-1 ) {
  78         goto done;
  79     }
  80     inSize = strlen(in);
  81     buf = SAFE_SIZE_ARRAY_ALLOC(malloc, inSize, 2);
  82     if (!buf) {
  83         return NULL;
  84     }
  85     bufSize = inSize*2; // need 2 bytes per char for UCS-2, this is
  86                         // 2 bytes per source byte max
  87     out = buf; outSize = bufSize;
  88     /* linux iconv wants char** source and solaris wants const char**...
  89        cast to void* */
  90     rc = iconv(cd, (void*)&in, &inSize, &out, &outSize);
  91     iconv_close(cd);
  92 
  93     if (rc == (size_t)-1) {
  94         free(buf);
  95         buf = NULL;
  96     } else {
  97         if (size) {
  98             *size = (bufSize-outSize)/2; /* bytes to wchars */
  99         }
 100     }
 101 done:
 102     setlocale(LC_ALL, old_locale);
 103     return buf;
 104 }
 105 
 106 void
 107 SplashInitFrameShape(Splash * splash, int imageIndex) {
 108     ImageRect maskRect;
 109     XRectangle *rects;
 110     SplashImage *frame = splash->frames + imageIndex;
 111 
 112     frame->rects = NULL;
 113     frame->numRects = 0;
 114 
 115     if (!splash->maskRequired)
 116         return;
 117     if (!shapeSupported)
 118         return;
 119     initRect(&maskRect, 0, 0, splash->width, splash->height, 1,
 120             splash->width * splash->imageFormat.depthBytes,
 121             splash->frames[imageIndex].bitmapBits, &splash->imageFormat);
 122     if (!IS_SAFE_SIZE_MUL(splash->width / 2 + 1, splash->height)) {
 123         return;
 124     }
 125     rects = SAFE_SIZE_ARRAY_ALLOC(malloc,
 126             sizeof(XRectangle), (splash->width / 2 + 1) * splash->height);
 127     if (!rects) {
 128         return;
 129     }
 130 
 131     frame->numRects = BitmapToYXBandedRectangles(&maskRect, rects);
 132     frame->rects = SAFE_SIZE_ARRAY_ALLOC(malloc, frame->numRects, sizeof(XRectangle));
 133     if (frame->rects) { // handle the error after the if(){}
 134         memcpy(frame->rects, rects, frame->numRects * sizeof(XRectangle));
 135     }
 136     free(rects);
 137 }
 138 
 139 unsigned
 140 SplashTime(void) {
 141     struct timeval tv;
 142     struct timezone tz;
 143     unsigned long long msec;
 144 
 145     gettimeofday(&tv, &tz);
 146     msec = (unsigned long long) tv.tv_sec * 1000 +
 147         (unsigned long long) tv.tv_usec / 1000;
 148 
 149     return (unsigned) msec;
 150 }
 151 
 152 void
 153 msec2timeval(unsigned time, struct timeval *tv) {
 154     tv->tv_sec = time / 1000;
 155     tv->tv_usec = (time % 1000) * 1000;
 156 }
 157 
 158 int
 159 GetNumAvailableColors(Display * display, Screen * screen, unsigned map_entries) {
 160     unsigned long pmr[1];
 161     unsigned long pr[SPLASH_COLOR_MAP_SIZE];
 162     unsigned nFailed, nAllocated, done = 0, nPlanes = 0;
 163     Colormap cmap;
 164     unsigned numColors = SPLASH_COLOR_MAP_SIZE; // never try allocating more than that
 165 
 166     if (numColors > map_entries) {
 167         numColors = map_entries;
 168     }
 169     cmap = XDefaultColormapOfScreen(screen);
 170     nAllocated = 0;             /* lower bound */
 171     nFailed = numColors + 1;    /* upper bound */
 172 
 173     /* Binary search to determine the number of available cells */
 174     for (done = 0; !done;) {
 175         if (XAllocColorCells(display, cmap, 0, pmr, nPlanes, pr, numColors)) {
 176             nAllocated = numColors;
 177             XFreeColors(display, cmap, pr, numColors, 0);
 178             if (nAllocated < (nFailed - 1)) {
 179                 numColors = (nAllocated + nFailed) / 2;
 180             } else
 181                 done = 1;
 182         } else {
 183             nFailed = numColors;
 184             if (nFailed > (nAllocated + 1))
 185                 numColors = (nAllocated + nFailed) / 2;
 186             else
 187                 done = 1;
 188         }
 189     }
 190     return nAllocated;
 191 }
 192 
 193 Colormap
 194 AllocColors(Display * display, Screen * screen, int numColors,
 195         unsigned long *pr) {
 196     unsigned long pmr[1];
 197     Colormap cmap = XDefaultColormapOfScreen(screen);
 198 
 199     XAllocColorCells(display, cmap, 0, pmr, 0, pr, numColors);
 200     return cmap;
 201 }
 202 
 203 void
 204 FreeColors(Display * display, Screen * screen, int numColors,
 205         unsigned long *pr) {
 206     Colormap cmap = XDefaultColormapOfScreen(screen);
 207 
 208     XFreeColors(display, cmap, pr, numColors, 0);
 209 }
 210 
 211 static void SplashCenter(Splash * splash) {
 212     Atom type, atom, actual_type;
 213     int status, actual_format;
 214     unsigned long nitems, bytes_after;
 215     CARD16 *prop = NULL;
 216 
 217     /*  try centering using Xinerama hint
 218         if there's no hint, use the center of the screen */
 219     atom = XInternAtom(splash->display, "XINERAMA_CENTER_HINT", True);
 220     if (atom != None) {
 221         status = XGetWindowProperty(splash->display,
 222             XRootWindowOfScreen(splash->screen), atom, 0, 1, False, XA_INTEGER,
 223             &actual_type, &actual_format, &nitems,
 224             &bytes_after, (unsigned char**)(&prop));
 225         if (status == Success && actual_type != None && prop != NULL) {
 226             splash->x = prop[0] - splash->width/2;
 227             splash->y = prop[1] - splash->height/2;
 228             XFree(prop);
 229             return;
 230         }
 231         if (prop != NULL) {
 232             XFree(prop);
 233         }
 234     }
 235     splash->x = (XWidthOfScreen(splash->screen) - splash->width) / 2;
 236     splash->y = (XHeightOfScreen(splash->screen) - splash->height) / 2;
 237 }
 238 
 239 static void SplashUpdateSizeHints(Splash * splash) {
 240     if (splash->window) {
 241         XSizeHints sizeHints;
 242 
 243         sizeHints.flags = USPosition | PPosition | USSize | PSize | PMinSize | PMaxSize | PWinGravity;
 244         sizeHints.width = sizeHints.base_width = sizeHints.min_width = sizeHints.max_width = splash->width;
 245         sizeHints.height = sizeHints.base_height = sizeHints.min_height = sizeHints.max_height = splash->height;
 246         sizeHints.win_gravity = NorthWestGravity;
 247 
 248         XSetWMNormalHints(splash->display, splash->window, &sizeHints);
 249     }
 250 }
 251 
 252 void
 253 SplashCreateWindow(Splash * splash) {
 254     XSizeHints sizeHints;
 255 
 256     XSetWindowAttributes attr;
 257 
 258     attr.backing_store = NotUseful;
 259     attr.colormap = XDefaultColormapOfScreen(splash->screen);
 260     attr.save_under = True;
 261     attr.cursor = splash->cursor = XCreateFontCursor(splash->display, XC_watch);
 262     attr.event_mask = ExposureMask;
 263 
 264     SplashCenter(splash);
 265 
 266     splash->window = XCreateWindow(splash->display, XRootWindowOfScreen(splash->screen),
 267         splash->x, splash->y, splash->width, splash->height, 0, CopyFromParent,
 268         InputOutput, CopyFromParent, CWColormap | CWBackingStore | CWSaveUnder | CWCursor | CWEventMask,
 269         &attr);
 270     SplashUpdateSizeHints(splash);
 271 
 272 
 273     splash->wmHints = XAllocWMHints();
 274     if (splash->wmHints) {
 275         splash->wmHints->flags = InputHint | StateHint;
 276         splash->wmHints->input = False;
 277         splash->wmHints->initial_state = NormalState;
 278         XSetWMHints(splash->display, splash->window, splash->wmHints);
 279     }
 280 }
 281 
 282 /* for changing the visible shape of a window to an nonrectangular form */
 283 void
 284 SplashUpdateShape(Splash * splash) {
 285     if (splash->currentFrame < 0 || !shapeSupported || !splash->maskRequired) {
 286         return;
 287     }
 288     XShapeCombineRectangles(splash->display, splash->window, ShapeClip, 0, 0,
 289             splash->frames[splash->currentFrame].rects,
 290             splash->frames[splash->currentFrame].numRects, ShapeSet, YXBanded);
 291     XShapeCombineRectangles(splash->display, splash->window, ShapeBounding,
 292             0, 0, splash->frames[splash->currentFrame].rects,
 293             splash->frames[splash->currentFrame].numRects, ShapeSet, YXBanded);
 294 }
 295 
 296 /* for reverting the visible shape of a window to an rectangular form */
 297 void
 298 SplashRevertShape(Splash * splash) {
 299     if (!shapeSupported)
 300         return;
 301     if (splash->maskRequired)
 302         return;
 303 
 304     XShapeCombineMask (splash->display, splash->window, ShapeClip,
 305                        0, 0, None, ShapeSet);
 306     XShapeCombineMask (splash->display, splash->window , ShapeBounding,
 307                        0, 0, None, ShapeSet);
 308 }
 309 
 310 int
 311 ByteOrderToX(int byteOrder) {
 312     if (byteOrder == BYTE_ORDER_NATIVE)
 313         byteOrder = platformByteOrder();
 314     switch (byteOrder) {
 315     case BYTE_ORDER_LSBFIRST:
 316         return LSBFirst;
 317     case BYTE_ORDER_MSBFIRST:
 318         return MSBFirst;
 319     default:
 320         return -1;
 321     }
 322 }
 323 
 324 void
 325 SplashRedrawWindow(Splash * splash) {
 326     if (splash->currentFrame < 0) {
 327         return;
 328     }
 329 
 330     XImage *ximage;
 331 
 332     // making this method redraw a part of the image does not make
 333     // much sense as SplashUpdateScreenData always re-generates
 334     // the image completely, so whole window is always redrawn
 335 
 336     SplashUpdateScreenData(splash);
 337     ximage = XCreateImage(splash->display, splash->visual,
 338             splash->screenFormat.depthBytes * 8, ZPixmap, 0, (char *) NULL,
 339             splash->width, splash->height, 8, 0);
 340     ximage->data = (char *) splash->screenData;
 341     ximage->bits_per_pixel = ximage->depth;
 342     ximage->bytes_per_line = ximage->depth * ximage->width / 8;
 343     ximage->byte_order = ByteOrderToX(splash->screenFormat.byteOrder);
 344     ximage->bitmap_unit = 8;
 345     XPutImage(splash->display, splash->window,
 346             XDefaultGCOfScreen(splash->screen), ximage, 0, 0, 0, 0,
 347             splash->width, splash->height);
 348     ximage->data = NULL;
 349     XDestroyImage(ximage);
 350     SplashRemoveDecoration(splash);
 351     XMapWindow(splash->display, splash->window);
 352     XFlush(splash->display);
 353 }
 354 
 355 void SplashReconfigureNow(Splash * splash) {
 356     SplashCenter(splash);
 357     if (splash->window) {
 358         XUnmapWindow(splash->display, splash->window);
 359         XMoveResizeWindow(splash->display, splash->window,
 360             splash->x, splash->y,
 361             splash->width, splash->height);
 362         SplashUpdateSizeHints(splash);
 363     }
 364     if (splash->maskRequired) {
 365         SplashUpdateShape(splash);
 366     } else {
 367         SplashRevertShape(splash);
 368     }
 369     SplashRedrawWindow(splash);
 370 }
 371 
 372 
 373 void
 374 sendctl(Splash * splash, char code) {
 375 //    if (splash->isVisible>0) {
 376     if (splash && splash->controlpipe[1]) {
 377         write(splash->controlpipe[1], &code, 1);
 378     }
 379 }
 380 
 381 int
 382 HandleError(Display * disp, XErrorEvent * err) {
 383     // silently ignore non-fatal errors
 384     /*
 385     char msg[0x1000];
 386     char buf[0x1000];
 387     XGetErrorText(disp, err->error_code, msg, sizeof(msg));
 388     fprintf(stderr, "Xerror %s, XID %x, ser# %d\n", msg, err->resourceid,
 389         err->serial);
 390     sprintf(buf, "%d", err->request_code);
 391     XGetErrorDatabaseText(disp, "XRequest", buf, "Unknown", msg, sizeof(msg));
 392     fprintf(stderr, "Major opcode %d (%s)\n", err->request_code, msg);
 393     if (err->request_code > 128) {
 394         fprintf(stderr, "Minor opcode %d\n", err->minor_code);
 395     }
 396     */
 397     return 0;
 398 }
 399 
 400 int
 401 HandleIOError(Display * display) {
 402     // for really bad errors, we should exit the thread we're on
 403     SplashCleanup(SplashGetInstance());
 404     pthread_exit(NULL);
 405     return 0;
 406 }
 407 
 408 int
 409 SplashInitPlatform(Splash * splash) {
 410     int shapeVersionMajor, shapeVersionMinor;
 411 
 412     // This setting enables the synchronous Xlib mode!
 413     // Don't use it == 1 in production builds!
 414 #if (defined DEBUG)
 415     _Xdebug = 1;
 416 #endif
 417 
 418     pthread_mutex_init(&splash->lock, NULL);
 419 
 420     // We should not ignore any errors.
 421     //XSetErrorHandler(HandleError);
 422 //    XSetIOErrorHandler(HandleIOError);
 423     XSetIOErrorHandler(NULL);
 424     splash->display = XOpenDisplay(NULL);
 425     if (!splash->display) {
 426         splash->isVisible = -1;
 427         return 0;
 428     }
 429 
 430     shapeSupported = XShapeQueryExtension(splash->display, &shapeEventBase,
 431             &shapeErrorBase);
 432     if (shapeSupported) {
 433         XShapeQueryVersion(splash->display, &shapeVersionMajor,
 434                 &shapeVersionMinor);
 435     }
 436 
 437     splash->screen = XDefaultScreenOfDisplay(splash->display);
 438     splash->visual = XDefaultVisualOfScreen(splash->screen);
 439     switch (splash->visual->class) {
 440     case TrueColor: {
 441             int depth = XDefaultDepthOfScreen(splash->screen);
 442 
 443             splash->byteAlignment = 1;
 444             splash->maskRequired = shapeSupported;
 445             initFormat(&splash->screenFormat, splash->visual->red_mask,
 446                     splash->visual->green_mask, splash->visual->blue_mask, 0);
 447             splash->screenFormat.byteOrder =
 448                 (XImageByteOrder(splash->display) == LSBFirst ?
 449                  BYTE_ORDER_LSBFIRST : BYTE_ORDER_MSBFIRST);
 450             splash->screenFormat.depthBytes = (depth + 7) / 8;
 451             // TrueColor depth probably can't be less
 452             // than 8 bits, and it's always byte padded
 453             break;
 454         }
 455     case PseudoColor: {
 456             int availableColors;
 457             int numColors;
 458             int numComponents[3];
 459             unsigned long colorIndex[SPLASH_COLOR_MAP_SIZE];
 460             XColor xColors[SPLASH_COLOR_MAP_SIZE];
 461             int i;
 462             int depth = XDefaultDepthOfScreen(splash->screen);
 463             int scale = 65535 / MAX_COLOR_VALUE;
 464 
 465             availableColors = GetNumAvailableColors(splash->display, splash->screen,
 466                     splash->visual->map_entries);
 467             numColors = quantizeColors(availableColors, numComponents);
 468             if (numColors > availableColors) {
 469                 // Could not allocate the color cells. Most probably
 470                 // the pool got exhausted. Disable the splash screen.
 471                 XCloseDisplay(splash->display);
 472                 splash->isVisible = -1;
 473                 splash->display = NULL;
 474                 splash->screen = NULL;
 475                 splash->visual = NULL;
 476                 fprintf(stderr, "Warning: unable to initialize the splashscreen. Not enough available color cells.\n");
 477                 return 0;
 478             }
 479             splash->cmap = AllocColors(splash->display, splash->screen,
 480                     numColors, colorIndex);
 481             for (i = 0; i < numColors; i++) {
 482                 splash->colorIndex[i] = colorIndex[i];
 483             }
 484             initColorCube(numComponents, splash->colorMap, splash->dithers,
 485                     splash->colorIndex);
 486             for (i = 0; i < numColors; i++) {
 487                 xColors[i].pixel = colorIndex[i];
 488                 xColors[i].red = (unsigned short)
 489                     QUAD_RED(splash->colorMap[colorIndex[i]]) * scale;
 490                 xColors[i].green = (unsigned short)
 491                     QUAD_GREEN(splash->colorMap[colorIndex[i]]) * scale;
 492                 xColors[i].blue = (unsigned short)
 493                     QUAD_BLUE(splash->colorMap[colorIndex[i]]) * scale;
 494                 xColors[i].flags = DoRed | DoGreen | DoBlue;
 495             }
 496             XStoreColors(splash->display, splash->cmap, xColors, numColors);
 497             initFormat(&splash->screenFormat, 0, 0, 0, 0);
 498             splash->screenFormat.colorIndex = splash->colorIndex;
 499             splash->screenFormat.depthBytes = (depth + 7) / 8;  // or always 8?
 500             splash->screenFormat.colorMap = splash->colorMap;
 501             splash->screenFormat.dithers = splash->dithers;
 502             splash->screenFormat.numColors = numColors;
 503             splash->screenFormat.byteOrder = BYTE_ORDER_NATIVE;
 504             break;
 505         }
 506     default:
 507         ; /* FIXME: should probably be fixed, but javaws splash screen doesn't support other visuals either */
 508     }
 509     return 1;
 510 }
 511 
 512 
 513 void
 514 SplashCleanupPlatform(Splash * splash) {
 515     int i;
 516 
 517     if (splash->frames) {
 518         for (i = 0; i < splash->frameCount; i++) {
 519             if (splash->frames[i].rects) {
 520                 free(splash->frames[i].rects);
 521                 splash->frames[i].rects = NULL;
 522             }
 523         }
 524     }
 525     splash->maskRequired = shapeSupported;
 526 }
 527 
 528 void
 529 SplashDonePlatform(Splash * splash) {
 530     pthread_mutex_destroy(&splash->lock);
 531     if (splash->cmap) {
 532         unsigned long colorIndex[SPLASH_COLOR_MAP_SIZE];
 533         int i;
 534 
 535         for (i = 0; i < splash->screenFormat.numColors; i++) {
 536             colorIndex[i] = splash->colorIndex[i];
 537         }
 538         FreeColors(splash->display, splash->screen,
 539                 splash->screenFormat.numColors, colorIndex);
 540     }
 541     if (splash->window)
 542         XDestroyWindow(splash->display, splash->window);
 543     if (splash->wmHints)
 544         XFree(splash->wmHints);
 545     if (splash->cursor)
 546         XFreeCursor(splash->display, splash->cursor);
 547     if (splash->display)
 548         XCloseDisplay(splash->display);
 549 }
 550 
 551 void
 552 SplashEventLoop(Splash * splash) {
 553 
 554     /*      Different from win32 implementation - this loop
 555        uses poll timeouts instead of a timer */
 556     /* we should have splash _locked_ on entry!!! */
 557 
 558     int xconn = XConnectionNumber(splash->display);
 559 
 560     while (1) {
 561         struct pollfd pfd[2];
 562         int timeout = -1;
 563         int ctl = splash->controlpipe[0];
 564         int rc;
 565         int pipes_empty;
 566 
 567         pfd[0].fd = xconn;
 568         pfd[0].events = POLLIN | POLLPRI;
 569 
 570         pfd[1].fd = ctl;
 571         pfd[1].events = POLLIN | POLLPRI;
 572 
 573         errno = 0;
 574         if (splash->isVisible>0 && SplashIsStillLooping(splash)) {
 575             timeout = splash->time + splash->frames[splash->currentFrame].delay
 576                 - SplashTime();
 577             if (timeout < 0) {
 578                 timeout = 0;
 579             }
 580         }
 581         SplashUnlock(splash);
 582         rc = poll(pfd, 2, timeout);
 583         SplashLock(splash);
 584         if (splash->isVisible > 0 && splash->currentFrame >= 0 &&
 585                 SplashTime() >= splash->time + splash->frames[splash->currentFrame].delay) {
 586             SplashNextFrame(splash);
 587             SplashUpdateShape(splash);
 588             SplashRedrawWindow(splash);
 589         }
 590         if (rc <= 0) {
 591             errno = 0;
 592             continue;
 593         }
 594         pipes_empty = 0;
 595         while(!pipes_empty) {
 596             char buf;
 597 
 598             pipes_empty = 1;
 599             if (read(ctl, &buf, sizeof(buf)) > 0) {
 600                 pipes_empty = 0;
 601                 switch (buf) {
 602                 case SPLASHCTL_UPDATE:
 603                     if (splash->isVisible>0) {
 604                         SplashRedrawWindow(splash);
 605                     }
 606                     break;
 607                 case SPLASHCTL_RECONFIGURE:
 608                     if (splash->isVisible>0) {
 609                         SplashReconfigureNow(splash);
 610                     }
 611                     break;
 612                 case SPLASHCTL_QUIT:
 613                     return;
 614                 }
 615             }
 616             // we're not using "while(XPending)", processing one event
 617             // at a time to avoid control pipe starvation
 618             if (XPending(splash->display)) {
 619                 XEvent evt;
 620 
 621                 pipes_empty = 0;
 622                 XNextEvent(splash->display, &evt);
 623                 switch (evt.type) {
 624                     case Expose:
 625                         if (splash->isVisible>0) {
 626                             // we're doing full redraw so we just
 627                             // skip the remaining painting events in the queue
 628                             while(XCheckTypedEvent(splash->display, Expose,
 629                                 &evt));
 630                             SplashRedrawWindow(splash);
 631                         }
 632                         break;
 633                     /* ... */
 634                 }
 635             }
 636         }
 637     }
 638 }
 639 
 640 /*  we can't use OverrideRedirect for the window as the window should not be
 641     always-on-top, so we must set appropriate wm hints
 642 
 643     this functions sets olwm, mwm and EWMH hints for undecorated window at once
 644 
 645     It works for: mwm, openbox, wmaker, metacity, KWin (FIXME: test more wm's)
 646     Should work for: fvwm2.5.x, blackbox, olwm
 647     Maybe works for: enlightenment, icewm
 648     Does not work for: twm, fvwm2.4.7
 649 
 650 */
 651 
 652 void
 653 SplashRemoveDecoration(Splash * splash) {
 654     Atom atom_set;
 655     Atom atom_list[4];
 656 
 657     /* the struct below was copied from MwmUtil.h */
 658 
 659     struct PROPMOTIFWMHINTS {
 660     /* 32-bit property items are stored as long on the client (whether
 661      * that means 32 bits or 64).  XChangeProperty handles the conversion
 662      * to the actual 32-bit quantities sent to the server.
 663      */
 664         unsigned long   flags;
 665         unsigned long   functions;
 666         unsigned long   decorations;
 667         long            inputMode;
 668         unsigned long   status;
 669     }
 670     mwm_hints;
 671 
 672     /* WM_TAKE_FOCUS hint to avoid wm's transfer of focus to this window */
 673     /* WM_DELETE_WINDOW hint to avoid closing this window with Alt-F4. See bug 6474035 */
 674     atom_set = XInternAtom(splash->display, "WM_PROTOCOLS", True);
 675     if (atom_set != None) {
 676         atom_list[0] = XInternAtom(splash->display, "WM_TAKE_FOCUS", True);
 677         atom_list[1] = XInternAtom(splash->display, "WM_DELETE_WINDOW", True);
 678 
 679         XChangeProperty(splash->display, splash->window, atom_set, XA_ATOM, 32,
 680                 PropModeReplace, (unsigned char *) atom_list, 2);
 681     }
 682 
 683     /* mwm hints */
 684     atom_set = XInternAtom(splash->display, "_MOTIF_WM_HINTS", True);
 685     if (atom_set != None) {
 686         /* flags for decoration and functions */
 687         mwm_hints.flags = (1L << 1) | (1L << 0);
 688         mwm_hints.decorations = 0;
 689         mwm_hints.functions = 0;
 690         XChangeProperty(splash->display, splash->window, atom_set, atom_set,
 691                 32, PropModeReplace, (unsigned char *) &mwm_hints, 5);
 692     }
 693 
 694     /* olwm hints */
 695     atom_set = XInternAtom(splash->display, "_OL_DECOR_DEL", True);
 696     if (atom_set != None) {
 697         atom_list[0] = XInternAtom(splash->display, "_OL_DECOR_RESIZE", True);
 698         atom_list[1] = XInternAtom(splash->display, "_OL_DECOR_HEADER", True);
 699         atom_list[2] = XInternAtom(splash->display, "_OL_DECOR_PIN", True);
 700         atom_list[3] = XInternAtom(splash->display, "_OL_DECOR_CLOSE", True);
 701         XChangeProperty(splash->display, splash->window, atom_set, XA_ATOM, 32,
 702                 PropModeReplace, (unsigned char *) atom_list, 4);
 703     }
 704 
 705     /* generic EMWH hints
 706        we do not set _NET_WM_WINDOW_TYPE to _NET_WM_WINDOW_TYPE_SPLASH
 707        hint support due to gnome making this window always-on-top
 708        so we have to set _NET_WM_STATE and _NET_WM_ALLOWED_ACTIONS correctly
 709        _NET_WM_STATE: SKIP_TASKBAR and SKIP_PAGER
 710        _NET_WM_ALLOWED_ACTIONS: disable all actions */
 711     atom_set = XInternAtom(splash->display, "_NET_WM_STATE", True);
 712     if (atom_set != None) {
 713         atom_list[0] = XInternAtom(splash->display,
 714                 "_NET_WM_STATE_SKIP_TASKBAR", True);
 715         atom_list[1] = XInternAtom(splash->display,
 716                 "_NET_WM_STATE_SKIP_PAGER", True);
 717         XChangeProperty(splash->display, splash->window, atom_set, XA_ATOM, 32,
 718                 PropModeReplace, (unsigned char *) atom_list, 2);
 719     }
 720     atom_set = XInternAtom(splash->display, "_NET_WM_ALLOWED_ACTIONS", True);
 721     if (atom_set != None) {
 722         XChangeProperty(splash->display, splash->window, atom_set, XA_ATOM, 32,
 723                 PropModeReplace, (unsigned char *) atom_list, 0);
 724     }
 725 }
 726 
 727 void
 728 SplashPThreadDestructor(void *arg) {
 729     /* this will be used in case of emergency thread exit on xlib error */
 730     Splash *splash = (Splash *) arg;
 731 
 732     if (splash) {
 733         SplashCleanup(splash);
 734     }
 735 }
 736 
 737 void *
 738 SplashScreenThread(void *param) {
 739     Splash *splash = (Splash *) param;
 740 //    pthread_key_t key;
 741 
 742 //    pthread_key_create(&key, SplashPThreadDestructor);
 743 //    pthread_setspecific(key, splash);
 744 
 745     SplashLock(splash);
 746     pipe(splash->controlpipe);
 747     fcntl(splash->controlpipe[0], F_SETFL,
 748         fcntl(splash->controlpipe[0], F_GETFL, 0) | O_NONBLOCK);
 749     splash->time = SplashTime();
 750     SplashCreateWindow(splash);
 751     fflush(stdout);
 752     if (splash->window) {
 753         SplashRemoveDecoration(splash);
 754         XStoreName(splash->display, splash->window, "Java");
 755         XMapRaised(splash->display, splash->window);
 756         SplashUpdateShape(splash);
 757         SplashRedrawWindow(splash);
 758         //map the splash co-ordinates as per system scale
 759         splash->x /= splash->scaleFactor;
 760         splash->y /= splash->scaleFactor;
 761         SplashEventLoop(splash);
 762     }
 763     SplashUnlock(splash);
 764     SplashDone(splash);
 765 
 766     splash->isVisible=-1;
 767     return 0;
 768 }
 769 
 770 void
 771 SplashCreateThread(Splash * splash) {
 772     pthread_t thr;
 773     pthread_attr_t attr;
 774     int rc;
 775 
 776     pthread_attr_init(&attr);
 777     rc = pthread_create(&thr, &attr, SplashScreenThread, (void *) splash);
 778 }
 779 
 780 void
 781 SplashLock(Splash * splash) {
 782     pthread_mutex_lock(&splash->lock);
 783 }
 784 
 785 void
 786 SplashUnlock(Splash * splash) {
 787     pthread_mutex_unlock(&splash->lock);
 788 }
 789 
 790 void
 791 SplashClosePlatform(Splash * splash) {
 792     sendctl(splash, SPLASHCTL_QUIT);
 793 }
 794 
 795 void
 796 SplashUpdate(Splash * splash) {
 797     sendctl(splash, SPLASHCTL_UPDATE);
 798 }
 799 
 800 void
 801 SplashReconfigure(Splash * splash) {
 802     sendctl(splash, SPLASHCTL_RECONFIGURE);
 803 }
 804 
 805 JNIEXPORT jboolean
 806 SplashGetScaledImageName(const char* jarName, const char* fileName,
 807                            float *scaleFactor, char *scaledImgName,
 808                            const size_t scaledImageNameLength)
 809 {
 810     *scaleFactor = 1;
 811 #ifndef __linux__
 812     return JNI_FALSE;
 813 #endif
 814     *scaleFactor = (float)getNativeScaleFactor(NULL);
 815     return GetScaledImageName(fileName, scaledImgName, scaleFactor, scaledImageNameLength);
 816 }
 817