| 1 | /*********************************************************** |
| 2 | |
| 3 | Copyright 1987, 1998 The Open Group |
| 4 | |
| 5 | Permission to use, copy, modify, distribute, and sell this software and its |
| 6 | documentation for any purpose is hereby granted without fee, provided that |
| 7 | the above copyright notice appear in all copies and that both that |
| 8 | copyright notice and this permission notice appear in supporting |
| 9 | documentation. |
| 10 | |
| 11 | The above copyright notice and this permission notice shall be included in |
| 12 | all copies or substantial portions of the Software. |
| 13 | |
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 20 | |
| 21 | Except as contained in this notice, the name of The Open Group shall not be |
| 22 | used in advertising or otherwise to promote the sale, use or other dealings |
| 23 | in this Software without prior written authorization from The Open Group. |
| 24 | |
| 25 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. |
| 26 | |
| 27 | All Rights Reserved |
| 28 | |
| 29 | Permission to use, copy, modify, and distribute this software and its |
| 30 | documentation for any purpose and without fee is hereby granted, |
| 31 | provided that the above copyright notice appear in all copies and that |
| 32 | both that copyright notice and this permission notice appear in |
| 33 | supporting documentation, and that the name of Digital not be |
| 34 | used in advertising or publicity pertaining to distribution of the |
| 35 | software without specific, written prior permission. |
| 36 | |
| 37 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 38 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| 39 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| 40 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 41 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| 42 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 43 | SOFTWARE. |
| 44 | |
| 45 | ******************************************************************/ |
| 46 | |
| 47 | #ifdef HAVE_DIX_CONFIG_H |
| 48 | #include <dix-config.h> |
| 49 | #endif |
| 50 | |
| 51 | #include <X11/X.h> |
| 52 | #include <X11/Xmd.h> |
| 53 | #include "servermd.h" |
| 54 | #include "scrnintstr.h" |
| 55 | #include "dixstruct.h" |
| 56 | #include "cursorstr.h" |
| 57 | #include "dixfontstr.h" |
| 58 | #include "opaque.h" |
| 59 | #include "inputstr.h" |
| 60 | #include "xace.h" |
| 61 | |
| 62 | typedef struct _GlyphShare { |
| 63 | FontPtr font; |
| 64 | unsigned short sourceChar; |
| 65 | unsigned short maskChar; |
| 66 | CursorBitsPtr bits; |
| 67 | struct _GlyphShare *next; |
| 68 | } GlyphShare, *GlyphSharePtr; |
| 69 | |
| 70 | static GlyphSharePtr sharedGlyphs = (GlyphSharePtr) NULL; |
| 71 | |
| 72 | DevScreenPrivateKeyRec cursorScreenDevPriv; |
| 73 | |
| 74 | static CARD32 cursorSerial; |
| 75 | |
| 76 | static void |
| 77 | FreeCursorBits(CursorBitsPtr bits) |
| 78 | { |
| 79 | if (--bits->refcnt > 0) |
| 80 | return; |
| 81 | free(bits->source); |
| 82 | free(bits->mask); |
| 83 | #ifdef ARGB_CURSOR |
| 84 | free(bits->argb); |
| 85 | #endif |
| 86 | dixFiniPrivates(bits, PRIVATE_CURSOR_BITS); |
| 87 | if (bits->refcnt == 0) { |
| 88 | GlyphSharePtr *prev, this; |
| 89 | |
| 90 | for (prev = &sharedGlyphs; |
| 91 | (this = *prev) && (this->bits != bits); prev = &this->next); |
| 92 | if (this) { |
| 93 | *prev = this->next; |
| 94 | CloseFont(this->font, (Font) 0); |
| 95 | free(this); |
| 96 | } |
| 97 | free(bits); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * To be called indirectly by DeleteResource; must use exactly two args. |
| 103 | * |
| 104 | * \param value must conform to DeleteType |
| 105 | */ |
| 106 | int |
| 107 | FreeCursor(pointer value, XID cid) |
| 108 | { |
| 109 | int nscr; |
| 110 | CursorPtr pCurs = (CursorPtr) value; |
| 111 | |
| 112 | ScreenPtr pscr; |
| 113 | DeviceIntPtr pDev = NULL; /* unused anyway */ |
| 114 | |
| 115 | |
| 116 | UnrefCursor(pCurs); |
| 117 | if (CursorRefCount(pCurs) != 0) |
| 118 | return Success; |
| 119 | |
| 120 | BUG_WARN(CursorRefCount(pCurs) < 0); |
| 121 | |
| 122 | for (nscr = 0; nscr < screenInfo.numScreens; nscr++) { |
| 123 | pscr = screenInfo.screens[nscr]; |
| 124 | (void) (*pscr->UnrealizeCursor) (pDev, pscr, pCurs); |
| 125 | } |
| 126 | FreeCursorBits(pCurs->bits); |
| 127 | dixFiniPrivates(pCurs, PRIVATE_CURSOR); |
| 128 | free(pCurs); |
| 129 | return Success; |
| 130 | } |
| 131 | |
| 132 | CursorPtr |
| 133 | RefCursor(CursorPtr cursor) |
| 134 | { |
| 135 | if (cursor) |
| 136 | cursor->refcnt++; |
| 137 | return cursor; |
| 138 | } |
| 139 | |
| 140 | CursorPtr |
| 141 | UnrefCursor(CursorPtr cursor) |
| 142 | { |
| 143 | if (cursor) |
| 144 | cursor->refcnt--; |
| 145 | return cursor; |
| 146 | } |
| 147 | |
| 148 | int |
| 149 | CursorRefCount(const CursorPtr cursor) |
| 150 | { |
| 151 | return cursor ? cursor->refcnt : 0; |
| 152 | } |
| 153 | |
| 154 | |
| 155 | /* |
| 156 | * We check for empty cursors so that we won't have to display them |
| 157 | */ |
| 158 | static void |
| 159 | CheckForEmptyMask(CursorBitsPtr bits) |
| 160 | { |
| 161 | unsigned char *msk = bits->mask; |
| 162 | int n = BitmapBytePad(bits->width) * bits->height; |
| 163 | |
| 164 | bits->emptyMask = FALSE; |
| 165 | while (n--) |
| 166 | if (*(msk++) != 0) |
| 167 | return; |
| 168 | #ifdef ARGB_CURSOR |
| 169 | if (bits->argb) { |
| 170 | CARD32 *argb = bits->argb; |
| 171 | |
| 172 | n = bits->width * bits->height; |
| 173 | while (n--) |
| 174 | if (*argb++ & 0xff000000) |
| 175 | return; |
| 176 | } |
| 177 | #endif |
| 178 | bits->emptyMask = TRUE; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * realize the cursor for every screen. Do not change the refcnt, this will be |
| 183 | * changed when ChangeToCursor actually changes the sprite. |
| 184 | * |
| 185 | * @return Success if all cursors realize on all screens, BadAlloc if realize |
| 186 | * failed for a device on a given screen. |
| 187 | */ |
| 188 | static int |
| 189 | RealizeCursorAllScreens(CursorPtr pCurs) |
| 190 | { |
| 191 | DeviceIntPtr pDev; |
| 192 | ScreenPtr pscr; |
| 193 | int nscr; |
| 194 | |
| 195 | for (nscr = 0; nscr < screenInfo.numScreens; nscr++) { |
| 196 | pscr = screenInfo.screens[nscr]; |
| 197 | for (pDev = inputInfo.devices; pDev; pDev = pDev->next) { |
| 198 | if (DevHasCursor(pDev)) { |
| 199 | if (!(*pscr->RealizeCursor) (pDev, pscr, pCurs)) { |
| 200 | /* Realize failed for device pDev on screen pscr. |
| 201 | * We have to assume that for all devices before, realize |
| 202 | * worked. We need to rollback all devices so far on the |
| 203 | * current screen and then all devices on previous |
| 204 | * screens. |
| 205 | */ |
| 206 | DeviceIntPtr pDevIt = inputInfo.devices; /*dev iterator */ |
| 207 | |
| 208 | while (pDevIt && pDevIt != pDev) { |
| 209 | if (DevHasCursor(pDevIt)) |
| 210 | (*pscr->UnrealizeCursor) (pDevIt, pscr, pCurs); |
| 211 | pDevIt = pDevIt->next; |
| 212 | } |
| 213 | while (--nscr >= 0) { |
| 214 | pscr = screenInfo.screens[nscr]; |
| 215 | /* now unrealize all devices on previous screens */ |
| 216 | pDevIt = inputInfo.devices; |
| 217 | while (pDevIt) { |
| 218 | if (DevHasCursor(pDevIt)) |
| 219 | (*pscr->UnrealizeCursor) (pDevIt, pscr, pCurs); |
| 220 | pDevIt = pDevIt->next; |
| 221 | } |
| 222 | (*pscr->UnrealizeCursor) (pDev, pscr, pCurs); |
| 223 | } |
| 224 | return BadAlloc; |
| 225 | } |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | return Success; |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * does nothing about the resource table, just creates the data structure. |
| 235 | * does not copy the src and mask bits |
| 236 | * |
| 237 | * \param psrcbits server-defined padding |
| 238 | * \param pmaskbits server-defined padding |
| 239 | * \param argb no padding |
| 240 | */ |
| 241 | int |
| 242 | AllocARGBCursor(unsigned char *psrcbits, unsigned char *pmaskbits, |
| 243 | CARD32 *argb, CursorMetricPtr cm, |
| 244 | unsigned foreRed, unsigned foreGreen, unsigned foreBlue, |
| 245 | unsigned backRed, unsigned backGreen, unsigned backBlue, |
| 246 | CursorPtr *ppCurs, ClientPtr client, XID cid) |
| 247 | { |
| 248 | CursorBitsPtr bits; |
| 249 | CursorPtr pCurs; |
| 250 | int rc; |
| 251 | |
| 252 | *ppCurs = NULL; |
| 253 | pCurs = (CursorPtr) calloc(CURSOR_REC_SIZE + CURSOR_BITS_SIZE, 1); |
| 254 | if (!pCurs) |
| 255 | return BadAlloc; |
| 256 | |
| 257 | bits = (CursorBitsPtr) ((char *) pCurs + CURSOR_REC_SIZE); |
| 258 | dixInitPrivates(pCurs, pCurs + 1, PRIVATE_CURSOR); |
| 259 | dixInitPrivates(bits, bits + 1, PRIVATE_CURSOR_BITS) |
| 260 | bits->source = psrcbits; |
| 261 | bits->mask = pmaskbits; |
| 262 | #ifdef ARGB_CURSOR |
| 263 | bits->argb = argb; |
| 264 | #endif |
| 265 | bits->width = cm->width; |
| 266 | bits->height = cm->height; |
| 267 | bits->xhot = cm->xhot; |
| 268 | bits->yhot = cm->yhot; |
| 269 | pCurs->refcnt = 1; |
| 270 | bits->refcnt = -1; |
| 271 | CheckForEmptyMask(bits); |
| 272 | pCurs->bits = bits; |
| 273 | pCurs->serialNumber = ++cursorSerial; |
| 274 | pCurs->name = None; |
| 275 | |
| 276 | pCurs->foreRed = foreRed; |
| 277 | pCurs->foreGreen = foreGreen; |
| 278 | pCurs->foreBlue = foreBlue; |
| 279 | |
| 280 | pCurs->backRed = backRed; |
| 281 | pCurs->backGreen = backGreen; |
| 282 | pCurs->backBlue = backBlue; |
| 283 | |
| 284 | pCurs->id = cid; |
| 285 | |
| 286 | /* security creation/labeling check */ |
| 287 | rc = XaceHook(XACE_RESOURCE_ACCESS, client, cid, RT_CURSOR, |
| 288 | pCurs, RT_NONE, NULL, DixCreateAccess); |
| 289 | if (rc != Success) |
| 290 | goto error; |
| 291 | |
| 292 | rc = RealizeCursorAllScreens(pCurs); |
| 293 | if (rc != Success) |
| 294 | goto error; |
| 295 | |
| 296 | *ppCurs = pCurs; |
| 297 | return Success; |
| 298 | |
| 299 | error: |
| 300 | FreeCursorBits(bits); |
| 301 | dixFiniPrivates(pCurs, PRIVATE_CURSOR); |
| 302 | free(pCurs); |
| 303 | |
| 304 | return rc; |
| 305 | } |
| 306 | |
| 307 | int |
| 308 | AllocGlyphCursor(Font source, unsigned sourceChar, Font mask, unsigned maskChar, |
| 309 | unsigned foreRed, unsigned foreGreen, unsigned foreBlue, |
| 310 | unsigned backRed, unsigned backGreen, unsigned backBlue, |
| 311 | CursorPtr *ppCurs, ClientPtr client, XID cid) |
| 312 | { |
| 313 | FontPtr sourcefont, maskfont; |
| 314 | unsigned char *srcbits; |
| 315 | unsigned char *mskbits; |
| 316 | CursorMetricRec cm; |
| 317 | int rc; |
| 318 | CursorBitsPtr bits; |
| 319 | CursorPtr pCurs; |
| 320 | GlyphSharePtr pShare; |
| 321 | |
| 322 | rc = dixLookupResourceByType((pointer *) &sourcefont, source, RT_FONT, |
| 323 | client, DixUseAccess); |
| 324 | if (rc != Success) { |
| 325 | client->errorValue = source; |
| 326 | return rc; |
| 327 | } |
| 328 | rc = dixLookupResourceByType((pointer *) &maskfont, mask, RT_FONT, client, |
| 329 | DixUseAccess); |
| 330 | if (rc != Success && mask != None) { |
| 331 | client->errorValue = mask; |
| 332 | return rc; |
| 333 | } |
| 334 | if (sourcefont != maskfont) |
| 335 | pShare = (GlyphSharePtr) NULL; |
| 336 | else { |
| 337 | for (pShare = sharedGlyphs; |
| 338 | pShare && |
| 339 | ((pShare->font != sourcefont) || |
| 340 | (pShare->sourceChar != sourceChar) || |
| 341 | (pShare->maskChar != maskChar)); pShare = pShare->next); |
| 342 | } |
| 343 | if (pShare) { |
| 344 | pCurs = (CursorPtr) calloc(CURSOR_REC_SIZE, 1); |
| 345 | if (!pCurs) |
| 346 | return BadAlloc; |
| 347 | dixInitPrivates(pCurs, pCurs + 1, PRIVATE_CURSOR); |
| 348 | bits = pShare->bits; |
| 349 | bits->refcnt++; |
| 350 | } |
| 351 | else { |
| 352 | if (!CursorMetricsFromGlyph(sourcefont, sourceChar, &cm)) { |
| 353 | client->errorValue = sourceChar; |
| 354 | return BadValue; |
| 355 | } |
| 356 | if (!maskfont) { |
| 357 | long n; |
| 358 | unsigned char *mskptr; |
| 359 | |
| 360 | n = BitmapBytePad(cm.width) * (long) cm.height; |
| 361 | mskptr = mskbits = malloc(n); |
| 362 | if (!mskptr) |
| 363 | return BadAlloc; |
| 364 | while (--n >= 0) |
| 365 | *mskptr++ = ~0; |
| 366 | } |
| 367 | else { |
| 368 | if (!CursorMetricsFromGlyph(maskfont, maskChar, &cm)) { |
| 369 | client->errorValue = maskChar; |
| 370 | return BadValue; |
| 371 | } |
| 372 | if ((rc = ServerBitsFromGlyph(maskfont, maskChar, &cm, &mskbits))) |
| 373 | return rc; |
| 374 | } |
| 375 | if ((rc = ServerBitsFromGlyph(sourcefont, sourceChar, &cm, &srcbits))) { |
| 376 | free(mskbits); |
| 377 | return rc; |
| 378 | } |
| 379 | if (sourcefont != maskfont) { |
| 380 | pCurs = (CursorPtr) calloc(CURSOR_REC_SIZE + CURSOR_BITS_SIZE, 1); |
| 381 | if (pCurs) |
| 382 | bits = (CursorBitsPtr) ((char *) pCurs + CURSOR_REC_SIZE); |
| 383 | else |
| 384 | bits = (CursorBitsPtr) NULL; |
| 385 | } |
| 386 | else { |
| 387 | pCurs = (CursorPtr) calloc(CURSOR_REC_SIZE, 1); |
| 388 | if (pCurs) |
| 389 | bits = (CursorBitsPtr) calloc(CURSOR_BITS_SIZE, 1); |
| 390 | else |
| 391 | bits = (CursorBitsPtr) NULL; |
| 392 | } |
| 393 | if (!bits) { |
| 394 | free(pCurs); |
| 395 | free(mskbits); |
| 396 | free(srcbits); |
| 397 | return BadAlloc; |
| 398 | } |
| 399 | dixInitPrivates(pCurs, pCurs + 1, PRIVATE_CURSOR); |
| 400 | dixInitPrivates(bits, bits + 1, PRIVATE_CURSOR_BITS); |
| 401 | bits->source = srcbits; |
| 402 | bits->mask = mskbits; |
| 403 | #ifdef ARGB_CURSOR |
| 404 | bits->argb = 0; |
| 405 | #endif |
| 406 | bits->width = cm.width; |
| 407 | bits->height = cm.height; |
| 408 | bits->xhot = cm.xhot; |
| 409 | bits->yhot = cm.yhot; |
| 410 | if (sourcefont != maskfont) |
| 411 | bits->refcnt = -1; |
| 412 | else { |
| 413 | bits->refcnt = 1; |
| 414 | pShare = malloc(sizeof(GlyphShare)); |
| 415 | if (!pShare) { |
| 416 | FreeCursorBits(bits); |
| 417 | return BadAlloc; |
| 418 | } |
| 419 | pShare->font = sourcefont; |
| 420 | sourcefont->refcnt++; |
| 421 | pShare->sourceChar = sourceChar; |
| 422 | pShare->maskChar = maskChar; |
| 423 | pShare->bits = bits; |
| 424 | pShare->next = sharedGlyphs; |
| 425 | sharedGlyphs = pShare; |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | CheckForEmptyMask(bits); |
| 430 | pCurs->bits = bits; |
| 431 | pCurs->refcnt = 1; |
| 432 | pCurs->serialNumber = ++cursorSerial; |
| 433 | pCurs->name = None; |
| 434 | |
| 435 | pCurs->foreRed = foreRed; |
| 436 | pCurs->foreGreen = foreGreen; |
| 437 | pCurs->foreBlue = foreBlue; |
| 438 | |
| 439 | pCurs->backRed = backRed; |
| 440 | pCurs->backGreen = backGreen; |
| 441 | pCurs->backBlue = backBlue; |
| 442 | |
| 443 | pCurs->id = cid; |
| 444 | |
| 445 | /* security creation/labeling check */ |
| 446 | rc = XaceHook(XACE_RESOURCE_ACCESS, client, cid, RT_CURSOR, |
| 447 | pCurs, RT_NONE, NULL, DixCreateAccess); |
| 448 | if (rc != Success) |
| 449 | goto error; |
| 450 | |
| 451 | rc = RealizeCursorAllScreens(pCurs); |
| 452 | if (rc != Success) |
| 453 | goto error; |
| 454 | |
| 455 | *ppCurs = pCurs; |
| 456 | return Success; |
| 457 | |
| 458 | error: |
| 459 | FreeCursorBits(bits); |
| 460 | dixFiniPrivates(pCurs, PRIVATE_CURSOR); |
| 461 | free(pCurs); |
| 462 | |
| 463 | return rc; |
| 464 | } |
| 465 | |
| 466 | /** CreateRootCursor |
| 467 | * |
| 468 | * look up the name of a font |
| 469 | * open the font |
| 470 | * add the font to the resource table |
| 471 | * make a cursor from the glyphs |
| 472 | * add the cursor to the resource table |
| 473 | *************************************************************/ |
| 474 | |
| 475 | CursorPtr |
| 476 | CreateRootCursor(char *unused1, unsigned int unused2) |
| 477 | { |
| 478 | CursorPtr curs; |
| 479 | FontPtr cursorfont; |
| 480 | int err; |
| 481 | XID fontID; |
| 482 | |
| 483 | fontID = FakeClientID(0); |
| 484 | err = OpenFont(serverClient, fontID, FontLoadAll | FontOpenSync, |
| 485 | (unsigned) strlen(defaultCursorFont), defaultCursorFont); |
| 486 | if (err != Success) |
| 487 | return NullCursor; |
| 488 | |
| 489 | err = dixLookupResourceByType((pointer *) &cursorfont, fontID, RT_FONT, |
| 490 | serverClient, DixReadAccess); |
| 491 | if (err != Success) |
| 492 | return NullCursor; |
| 493 | if (AllocGlyphCursor(fontID, 0, fontID, 1, 0, 0, 0, ~0, ~0, ~0, |
| 494 | &curs, serverClient, (XID) 0) != Success) |
| 495 | return NullCursor; |
| 496 | |
| 497 | if (!AddResource(FakeClientID(0), RT_CURSOR, (pointer) curs)) |
| 498 | return NullCursor; |
| 499 | |
| 500 | return curs; |
| 501 | } |