| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright (c) 1994, 1995 Hewlett-Packard Company |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person obtaining |
| 6 | * a copy of this software and associated documentation files (the |
| 7 | * "Software"), to deal in the Software without restriction, including |
| 8 | * without limitation the rights to use, copy, modify, merge, publish, |
| 9 | * distribute, sublicense, and/or sell copies of the Software, and to |
| 10 | * permit persons to whom the Software is furnished to do so, subject to |
| 11 | * the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included |
| 14 | * in all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 17 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 19 | * IN NO EVENT SHALL HEWLETT-PACKARD COMPANY BE LIABLE FOR ANY CLAIM, |
| 20 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| 21 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR |
| 22 | * THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Except as contained in this notice, the name of the Hewlett-Packard |
| 25 | * Company shall not be used in advertising or otherwise to promote the |
| 26 | * sale, use or other dealings in this Software without prior written |
| 27 | * authorization from the Hewlett-Packard Company. |
| 28 | * |
| 29 | * DIX DBE code |
| 30 | * |
| 31 | *****************************************************************************/ |
| 32 | |
| 33 | /* INCLUDES */ |
| 34 | |
| 35 | #ifdef HAVE_DIX_CONFIG_H |
| 36 | #include <dix-config.h> |
| 37 | #endif |
| 38 | |
| 39 | #include <string.h> |
| 40 | #include <stdint.h> |
| 41 | #include <X11/X.h> |
| 42 | #include <X11/Xproto.h> |
| 43 | #include "scrnintstr.h" |
| 44 | #include "extnsionst.h" |
| 45 | #include "extinit.h" |
| 46 | #include "gcstruct.h" |
| 47 | #include "dixstruct.h" |
| 48 | #define NEED_DBE_PROTOCOL |
| 49 | #include "dbestruct.h" |
| 50 | #include "midbe.h" |
| 51 | #include "xace.h" |
| 52 | |
| 53 | /* GLOBALS */ |
| 54 | |
| 55 | /* These are globals for use by DDX */ |
| 56 | DevPrivateKeyRec dbeScreenPrivKeyRec; |
| 57 | DevPrivateKeyRec dbeWindowPrivKeyRec; |
| 58 | |
| 59 | /* These are globals for use by DDX */ |
| 60 | RESTYPE dbeDrawableResType; |
| 61 | RESTYPE dbeWindowPrivResType; |
| 62 | |
| 63 | /* Used to generate DBE's BadBuffer error. */ |
| 64 | static int dbeErrorBase; |
| 65 | |
| 66 | /****************************************************************************** |
| 67 | * |
| 68 | * DBE DIX Procedure: DbeStubScreen |
| 69 | * |
| 70 | * Description: |
| 71 | * |
| 72 | * This is function stubs the function pointers in the given DBE screen |
| 73 | * private and increments the number of stubbed screens. |
| 74 | * |
| 75 | *****************************************************************************/ |
| 76 | |
| 77 | static void |
| 78 | DbeStubScreen(DbeScreenPrivPtr pDbeScreenPriv, int *nStubbedScreens) |
| 79 | { |
| 80 | /* Stub DIX. */ |
| 81 | pDbeScreenPriv->SetupBackgroundPainter = NULL; |
| 82 | |
| 83 | /* Do not unwrap PositionWindow nor DestroyWindow. If the DDX |
| 84 | * initialization function failed, we assume that it did not wrap |
| 85 | * PositionWindow. Also, DestroyWindow is only wrapped if the DDX |
| 86 | * initialization function succeeded. |
| 87 | */ |
| 88 | |
| 89 | /* Stub DDX. */ |
| 90 | pDbeScreenPriv->GetVisualInfo = NULL; |
| 91 | pDbeScreenPriv->AllocBackBufferName = NULL; |
| 92 | pDbeScreenPriv->SwapBuffers = NULL; |
| 93 | pDbeScreenPriv->WinPrivDelete = NULL; |
| 94 | |
| 95 | (*nStubbedScreens)++; |
| 96 | |
| 97 | } /* DbeStubScreen() */ |
| 98 | \f |
| 99 | /****************************************************************************** |
| 100 | * |
| 101 | * DBE DIX Procedure: ProcDbeGetVersion |
| 102 | * |
| 103 | * Description: |
| 104 | * |
| 105 | * This function is for processing a DbeGetVersion request. |
| 106 | * This request returns the major and minor version numbers of this |
| 107 | * extension. |
| 108 | * |
| 109 | * Return Values: |
| 110 | * |
| 111 | * Success |
| 112 | * |
| 113 | *****************************************************************************/ |
| 114 | |
| 115 | static int |
| 116 | ProcDbeGetVersion(ClientPtr client) |
| 117 | { |
| 118 | /* REQUEST(xDbeGetVersionReq); */ |
| 119 | xDbeGetVersionReply rep = { |
| 120 | .type = X_Reply, |
| 121 | .sequenceNumber = client->sequence, |
| 122 | .length = 0, |
| 123 | .majorVersion = DBE_MAJOR_VERSION, |
| 124 | .minorVersion = DBE_MINOR_VERSION |
| 125 | }; |
| 126 | |
| 127 | REQUEST_SIZE_MATCH(xDbeGetVersionReq); |
| 128 | |
| 129 | if (client->swapped) { |
| 130 | swaps(&rep.sequenceNumber); |
| 131 | } |
| 132 | |
| 133 | WriteToClient(client, sizeof(xDbeGetVersionReply), &rep); |
| 134 | |
| 135 | return Success; |
| 136 | |
| 137 | } /* ProcDbeGetVersion() */ |
| 138 | \f |
| 139 | /****************************************************************************** |
| 140 | * |
| 141 | * DBE DIX Procedure: ProcDbeAllocateBackBufferName |
| 142 | * |
| 143 | * Description: |
| 144 | * |
| 145 | * This function is for processing a DbeAllocateBackBufferName request. |
| 146 | * This request allocates a drawable ID used to refer to the back buffer |
| 147 | * of a window. |
| 148 | * |
| 149 | * Return Values: |
| 150 | * |
| 151 | * BadAlloc - server can not allocate resources |
| 152 | * BadIDChoice - id is out of range for client; id is already in use |
| 153 | * BadMatch - window is not an InputOutput window; |
| 154 | * visual of window is not on list returned by |
| 155 | * DBEGetVisualInfo; |
| 156 | * BadValue - invalid swap action is specified |
| 157 | * BadWindow - window is not a valid window |
| 158 | * Success |
| 159 | * |
| 160 | *****************************************************************************/ |
| 161 | |
| 162 | static int |
| 163 | ProcDbeAllocateBackBufferName(ClientPtr client) |
| 164 | { |
| 165 | REQUEST(xDbeAllocateBackBufferNameReq); |
| 166 | WindowPtr pWin; |
| 167 | DbeScreenPrivPtr pDbeScreenPriv; |
| 168 | DbeWindowPrivPtr pDbeWindowPriv; |
| 169 | XdbeScreenVisualInfo scrVisInfo; |
| 170 | register int i; |
| 171 | Bool visualMatched = FALSE; |
| 172 | xDbeSwapAction swapAction; |
| 173 | VisualID visual; |
| 174 | int status; |
| 175 | int add_index; |
| 176 | |
| 177 | REQUEST_SIZE_MATCH(xDbeAllocateBackBufferNameReq); |
| 178 | |
| 179 | /* The window must be valid. */ |
| 180 | status = dixLookupWindow(&pWin, stuff->window, client, DixManageAccess); |
| 181 | if (status != Success) |
| 182 | return status; |
| 183 | |
| 184 | /* The window must be InputOutput. */ |
| 185 | if (pWin->drawable.class != InputOutput) { |
| 186 | return BadMatch; |
| 187 | } |
| 188 | |
| 189 | /* The swap action must be valid. */ |
| 190 | swapAction = stuff->swapAction; /* use local var for performance. */ |
| 191 | if ((swapAction != XdbeUndefined) && |
| 192 | (swapAction != XdbeBackground) && |
| 193 | (swapAction != XdbeUntouched) && (swapAction != XdbeCopied)) { |
| 194 | return BadValue; |
| 195 | } |
| 196 | |
| 197 | /* The id must be in range and not already in use. */ |
| 198 | LEGAL_NEW_RESOURCE(stuff->buffer, client); |
| 199 | |
| 200 | /* The visual of the window must be in the list returned by |
| 201 | * GetVisualInfo. |
| 202 | */ |
| 203 | pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(pWin); |
| 204 | if (!pDbeScreenPriv->GetVisualInfo) |
| 205 | return BadMatch; /* screen doesn't support double buffering */ |
| 206 | |
| 207 | if (!(*pDbeScreenPriv->GetVisualInfo) (pWin->drawable.pScreen, &scrVisInfo)) { |
| 208 | /* GetVisualInfo() failed to allocate visual info data. */ |
| 209 | return BadAlloc; |
| 210 | } |
| 211 | |
| 212 | /* See if the window's visual is on the list. */ |
| 213 | visual = wVisual(pWin); |
| 214 | for (i = 0; (i < scrVisInfo.count) && !visualMatched; i++) { |
| 215 | if (scrVisInfo.visinfo[i].visual == visual) { |
| 216 | visualMatched = TRUE; |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | /* Free what was allocated by the GetVisualInfo() call above. */ |
| 221 | free(scrVisInfo.visinfo); |
| 222 | |
| 223 | if (!visualMatched) { |
| 224 | return BadMatch; |
| 225 | } |
| 226 | |
| 227 | if ((pDbeWindowPriv = DBE_WINDOW_PRIV(pWin)) == NULL) { |
| 228 | /* There is no buffer associated with the window. |
| 229 | * Allocate a window priv. |
| 230 | */ |
| 231 | |
| 232 | pDbeWindowPriv = calloc(1, sizeof(DbeWindowPrivRec)); |
| 233 | if (!pDbeWindowPriv) |
| 234 | return BadAlloc; |
| 235 | |
| 236 | /* Fill out window priv information. */ |
| 237 | pDbeWindowPriv->pWindow = pWin; |
| 238 | pDbeWindowPriv->width = pWin->drawable.width; |
| 239 | pDbeWindowPriv->height = pWin->drawable.height; |
| 240 | pDbeWindowPriv->x = pWin->drawable.x; |
| 241 | pDbeWindowPriv->y = pWin->drawable.y; |
| 242 | pDbeWindowPriv->nBufferIDs = 0; |
| 243 | |
| 244 | /* Set the buffer ID array pointer to the initial (static) array). */ |
| 245 | pDbeWindowPriv->IDs = pDbeWindowPriv->initIDs; |
| 246 | |
| 247 | /* Initialize the buffer ID list. */ |
| 248 | pDbeWindowPriv->maxAvailableIDs = DBE_INIT_MAX_IDS; |
| 249 | pDbeWindowPriv->IDs[0] = stuff->buffer; |
| 250 | |
| 251 | add_index = 0; |
| 252 | for (i = 0; i < DBE_INIT_MAX_IDS; i++) { |
| 253 | pDbeWindowPriv->IDs[i] = DBE_FREE_ID_ELEMENT; |
| 254 | } |
| 255 | |
| 256 | /* Actually connect the window priv to the window. */ |
| 257 | dixSetPrivate(&pWin->devPrivates, dbeWindowPrivKey, pDbeWindowPriv); |
| 258 | |
| 259 | } /* if -- There is no buffer associated with the window. */ |
| 260 | |
| 261 | else { |
| 262 | /* A buffer is already associated with the window. |
| 263 | * Add the new buffer ID to the array, reallocating the array memory |
| 264 | * if necessary. |
| 265 | */ |
| 266 | |
| 267 | /* Determine if there is a free element in the ID array. */ |
| 268 | for (i = 0; i < pDbeWindowPriv->maxAvailableIDs; i++) { |
| 269 | if (pDbeWindowPriv->IDs[i] == DBE_FREE_ID_ELEMENT) { |
| 270 | /* There is still room in the ID array. */ |
| 271 | break; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | if (i == pDbeWindowPriv->maxAvailableIDs) { |
| 276 | /* No more room in the ID array -- reallocate another array. */ |
| 277 | XID *pIDs; |
| 278 | |
| 279 | /* Setup an array pointer for the realloc operation below. */ |
| 280 | if (pDbeWindowPriv->maxAvailableIDs == DBE_INIT_MAX_IDS) { |
| 281 | /* We will malloc a new array. */ |
| 282 | pIDs = NULL; |
| 283 | } |
| 284 | else { |
| 285 | /* We will realloc a new array. */ |
| 286 | pIDs = pDbeWindowPriv->IDs; |
| 287 | } |
| 288 | |
| 289 | /* malloc/realloc a new array and initialize all elements to 0. */ |
| 290 | pDbeWindowPriv->IDs = (XID *) realloc(pIDs, |
| 291 | (pDbeWindowPriv-> |
| 292 | maxAvailableIDs + |
| 293 | DBE_INCR_MAX_IDS) * |
| 294 | sizeof(XID)); |
| 295 | if (!pDbeWindowPriv->IDs) { |
| 296 | return BadAlloc; |
| 297 | } |
| 298 | memset(&pDbeWindowPriv->IDs[pDbeWindowPriv->nBufferIDs], 0, |
| 299 | (pDbeWindowPriv->maxAvailableIDs + DBE_INCR_MAX_IDS - |
| 300 | pDbeWindowPriv->nBufferIDs) * sizeof(XID)); |
| 301 | |
| 302 | if (pDbeWindowPriv->maxAvailableIDs == DBE_INIT_MAX_IDS) { |
| 303 | /* We just went from using the initial (static) array to a |
| 304 | * newly allocated array. Copy the IDs from the initial array |
| 305 | * to the new array. |
| 306 | */ |
| 307 | memcpy(pDbeWindowPriv->IDs, pDbeWindowPriv->initIDs, |
| 308 | DBE_INIT_MAX_IDS * sizeof(XID)); |
| 309 | } |
| 310 | |
| 311 | pDbeWindowPriv->maxAvailableIDs += DBE_INCR_MAX_IDS; |
| 312 | } |
| 313 | |
| 314 | add_index = i; |
| 315 | |
| 316 | } /* else -- A buffer is already associated with the window. */ |
| 317 | |
| 318 | /* Call the DDX routine to allocate the back buffer. */ |
| 319 | status = (*pDbeScreenPriv->AllocBackBufferName) (pWin, stuff->buffer, |
| 320 | stuff->swapAction); |
| 321 | |
| 322 | if (status == Success) { |
| 323 | pDbeWindowPriv->IDs[add_index] = stuff->buffer; |
| 324 | if (!AddResource(stuff->buffer, dbeWindowPrivResType, |
| 325 | (pointer) pDbeWindowPriv)) { |
| 326 | pDbeWindowPriv->IDs[add_index] = DBE_FREE_ID_ELEMENT; |
| 327 | |
| 328 | if (pDbeWindowPriv->nBufferIDs == 0) { |
| 329 | status = BadAlloc; |
| 330 | goto out_free; |
| 331 | } |
| 332 | } |
| 333 | } |
| 334 | else { |
| 335 | /* The DDX buffer allocation routine failed for the first buffer of |
| 336 | * this window. |
| 337 | */ |
| 338 | if (pDbeWindowPriv->nBufferIDs == 0) { |
| 339 | goto out_free; |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | /* Increment the number of buffers (XIDs) associated with this window. */ |
| 344 | pDbeWindowPriv->nBufferIDs++; |
| 345 | |
| 346 | /* Set swap action on all calls. */ |
| 347 | pDbeWindowPriv->swapAction = stuff->swapAction; |
| 348 | |
| 349 | return status; |
| 350 | |
| 351 | out_free: |
| 352 | dixSetPrivate(&pWin->devPrivates, dbeWindowPrivKey, NULL); |
| 353 | free(pDbeWindowPriv); |
| 354 | return status; |
| 355 | |
| 356 | } /* ProcDbeAllocateBackBufferName() */ |
| 357 | \f |
| 358 | /****************************************************************************** |
| 359 | * |
| 360 | * DBE DIX Procedure: ProcDbeDeallocateBackBufferName |
| 361 | * |
| 362 | * Description: |
| 363 | * |
| 364 | * This function is for processing a DbeDeallocateBackBufferName request. |
| 365 | * This request frees a drawable ID that was obtained by a |
| 366 | * DbeAllocateBackBufferName request. |
| 367 | * |
| 368 | * Return Values: |
| 369 | * |
| 370 | * BadBuffer - buffer to deallocate is not associated with a window |
| 371 | * Success |
| 372 | * |
| 373 | *****************************************************************************/ |
| 374 | |
| 375 | static int |
| 376 | ProcDbeDeallocateBackBufferName(ClientPtr client) |
| 377 | { |
| 378 | REQUEST(xDbeDeallocateBackBufferNameReq); |
| 379 | DbeWindowPrivPtr pDbeWindowPriv; |
| 380 | int rc, i; |
| 381 | pointer val; |
| 382 | |
| 383 | REQUEST_SIZE_MATCH(xDbeDeallocateBackBufferNameReq); |
| 384 | |
| 385 | /* Buffer name must be valid */ |
| 386 | rc = dixLookupResourceByType((pointer *) &pDbeWindowPriv, stuff->buffer, |
| 387 | dbeWindowPrivResType, client, |
| 388 | DixDestroyAccess); |
| 389 | if (rc != Success) |
| 390 | return rc; |
| 391 | |
| 392 | rc = dixLookupResourceByType(&val, stuff->buffer, dbeDrawableResType, |
| 393 | client, DixDestroyAccess); |
| 394 | if (rc != Success) |
| 395 | return rc; |
| 396 | |
| 397 | /* Make sure that the id is valid for the window. |
| 398 | * This is paranoid code since we already looked up the ID by type |
| 399 | * above. |
| 400 | */ |
| 401 | |
| 402 | for (i = 0; i < pDbeWindowPriv->nBufferIDs; i++) { |
| 403 | /* Loop through the ID list to find the ID. */ |
| 404 | if (pDbeWindowPriv->IDs[i] == stuff->buffer) { |
| 405 | break; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | if (i == pDbeWindowPriv->nBufferIDs) { |
| 410 | /* We did not find the ID in the ID list. */ |
| 411 | client->errorValue = stuff->buffer; |
| 412 | return dbeErrorBase + DbeBadBuffer; |
| 413 | } |
| 414 | |
| 415 | FreeResource(stuff->buffer, RT_NONE); |
| 416 | |
| 417 | return Success; |
| 418 | |
| 419 | } /* ProcDbeDeallocateBackBufferName() */ |
| 420 | \f |
| 421 | /****************************************************************************** |
| 422 | * |
| 423 | * DBE DIX Procedure: ProcDbeSwapBuffers |
| 424 | * |
| 425 | * Description: |
| 426 | * |
| 427 | * This function is for processing a DbeSwapBuffers request. |
| 428 | * This request swaps the buffers for all windows listed, applying the |
| 429 | * appropriate swap action for each window. |
| 430 | * |
| 431 | * Return Values: |
| 432 | * |
| 433 | * BadAlloc - local allocation failed; this return value is not defined |
| 434 | * by the protocol |
| 435 | * BadMatch - a window in request is not double-buffered; a window in |
| 436 | * request is listed more than once |
| 437 | * BadValue - invalid swap action is specified; no swap action is |
| 438 | * specified |
| 439 | * BadWindow - a window in request is not valid |
| 440 | * Success |
| 441 | * |
| 442 | *****************************************************************************/ |
| 443 | |
| 444 | static int |
| 445 | ProcDbeSwapBuffers(ClientPtr client) |
| 446 | { |
| 447 | REQUEST(xDbeSwapBuffersReq); |
| 448 | WindowPtr pWin; |
| 449 | DbeScreenPrivPtr pDbeScreenPriv; |
| 450 | DbeSwapInfoPtr swapInfo; |
| 451 | xDbeSwapInfo *dbeSwapInfo; |
| 452 | int error; |
| 453 | register int i, j; |
| 454 | int nStuff; |
| 455 | |
| 456 | REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq); |
| 457 | nStuff = stuff->n; /* use local variable for performance. */ |
| 458 | |
| 459 | if (nStuff == 0) { |
| 460 | return Success; |
| 461 | } |
| 462 | |
| 463 | if (nStuff > UINT32_MAX / sizeof(DbeSwapInfoRec)) |
| 464 | return BadAlloc; |
| 465 | |
| 466 | /* Get to the swap info appended to the end of the request. */ |
| 467 | dbeSwapInfo = (xDbeSwapInfo *) &stuff[1]; |
| 468 | |
| 469 | /* Allocate array to record swap information. */ |
| 470 | swapInfo = (DbeSwapInfoPtr) malloc(nStuff * sizeof(DbeSwapInfoRec)); |
| 471 | if (swapInfo == NULL) { |
| 472 | return BadAlloc; |
| 473 | } |
| 474 | |
| 475 | for (i = 0; i < nStuff; i++) { |
| 476 | /* Check all windows to swap. */ |
| 477 | |
| 478 | /* Each window must be a valid window - BadWindow. */ |
| 479 | error = dixLookupWindow(&pWin, dbeSwapInfo[i].window, client, |
| 480 | DixWriteAccess); |
| 481 | if (error != Success) { |
| 482 | free(swapInfo); |
| 483 | return error; |
| 484 | } |
| 485 | |
| 486 | /* Each window must be double-buffered - BadMatch. */ |
| 487 | if (DBE_WINDOW_PRIV(pWin) == NULL) { |
| 488 | free(swapInfo); |
| 489 | return BadMatch; |
| 490 | } |
| 491 | |
| 492 | /* Each window must only be specified once - BadMatch. */ |
| 493 | for (j = i + 1; j < nStuff; j++) { |
| 494 | if (dbeSwapInfo[i].window == dbeSwapInfo[j].window) { |
| 495 | free(swapInfo); |
| 496 | return BadMatch; |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | /* Each swap action must be valid - BadValue. */ |
| 501 | if ((dbeSwapInfo[i].swapAction != XdbeUndefined) && |
| 502 | (dbeSwapInfo[i].swapAction != XdbeBackground) && |
| 503 | (dbeSwapInfo[i].swapAction != XdbeUntouched) && |
| 504 | (dbeSwapInfo[i].swapAction != XdbeCopied)) { |
| 505 | free(swapInfo); |
| 506 | return BadValue; |
| 507 | } |
| 508 | |
| 509 | /* Everything checks out OK. Fill in the swap info array. */ |
| 510 | swapInfo[i].pWindow = pWin; |
| 511 | swapInfo[i].swapAction = dbeSwapInfo[i].swapAction; |
| 512 | |
| 513 | } /* for (i = 0; i < nStuff; i++) */ |
| 514 | |
| 515 | /* Call the DDX routine to perform the swap(s). The DDX routine should |
| 516 | * scan the swap list (swap info), swap any buffers that it knows how to |
| 517 | * handle, delete them from the list, and update nStuff to indicate how |
| 518 | * many windows it did not handle. |
| 519 | * |
| 520 | * This scheme allows a range of sophistication in the DDX SwapBuffers() |
| 521 | * implementation. Naive implementations could just swap the first buffer |
| 522 | * in the list, move the last buffer to the front, decrement nStuff, and |
| 523 | * return. The next level of sophistication could be to scan the whole |
| 524 | * list for windows on the same screen. Up another level, the DDX routine |
| 525 | * could deal with cross-screen synchronization. |
| 526 | */ |
| 527 | |
| 528 | while (nStuff > 0) { |
| 529 | pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(swapInfo[0].pWindow); |
| 530 | error = (*pDbeScreenPriv->SwapBuffers) (client, &nStuff, swapInfo); |
| 531 | if (error != Success) { |
| 532 | free(swapInfo); |
| 533 | return error; |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | free(swapInfo); |
| 538 | return Success; |
| 539 | |
| 540 | } /* ProcDbeSwapBuffers() */ |
| 541 | \f |
| 542 | /****************************************************************************** |
| 543 | * |
| 544 | * DBE DIX Procedure: ProcDbeGetVisualInfo |
| 545 | * |
| 546 | * Description: |
| 547 | * |
| 548 | * This function is for processing a ProcDbeGetVisualInfo request. |
| 549 | * This request returns information about which visuals support |
| 550 | * double buffering. |
| 551 | * |
| 552 | * Return Values: |
| 553 | * |
| 554 | * BadDrawable - value in screen specifiers is not a valid drawable |
| 555 | * Success |
| 556 | * |
| 557 | *****************************************************************************/ |
| 558 | |
| 559 | static int |
| 560 | ProcDbeGetVisualInfo(ClientPtr client) |
| 561 | { |
| 562 | REQUEST(xDbeGetVisualInfoReq); |
| 563 | DbeScreenPrivPtr pDbeScreenPriv; |
| 564 | xDbeGetVisualInfoReply rep; |
| 565 | Drawable *drawables; |
| 566 | DrawablePtr *pDrawables = NULL; |
| 567 | register int i, j, rc; |
| 568 | register int count; /* number of visual infos in reply */ |
| 569 | register int length; /* length of reply */ |
| 570 | ScreenPtr pScreen; |
| 571 | XdbeScreenVisualInfo *pScrVisInfo; |
| 572 | |
| 573 | REQUEST_AT_LEAST_SIZE(xDbeGetVisualInfoReq); |
| 574 | |
| 575 | if (stuff->n > UINT32_MAX / sizeof(DrawablePtr)) |
| 576 | return BadAlloc; |
| 577 | /* Make sure any specified drawables are valid. */ |
| 578 | if (stuff->n != 0) { |
| 579 | if (!(pDrawables = (DrawablePtr *) malloc(stuff->n * |
| 580 | sizeof(DrawablePtr)))) { |
| 581 | return BadAlloc; |
| 582 | } |
| 583 | |
| 584 | drawables = (Drawable *) &stuff[1]; |
| 585 | |
| 586 | for (i = 0; i < stuff->n; i++) { |
| 587 | rc = dixLookupDrawable(pDrawables + i, drawables[i], client, 0, |
| 588 | DixGetAttrAccess); |
| 589 | if (rc != Success) { |
| 590 | free(pDrawables); |
| 591 | return rc; |
| 592 | } |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | count = (stuff->n == 0) ? screenInfo.numScreens : stuff->n; |
| 597 | if (!(pScrVisInfo = calloc(count, sizeof(XdbeScreenVisualInfo)))) { |
| 598 | free(pDrawables); |
| 599 | |
| 600 | return BadAlloc; |
| 601 | } |
| 602 | |
| 603 | length = 0; |
| 604 | |
| 605 | for (i = 0; i < count; i++) { |
| 606 | pScreen = (stuff->n == 0) ? screenInfo.screens[i] : |
| 607 | pDrawables[i]->pScreen; |
| 608 | pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); |
| 609 | |
| 610 | rc = XaceHook(XACE_SCREEN_ACCESS, client, pScreen, DixGetAttrAccess); |
| 611 | if (rc != Success) |
| 612 | goto freeScrVisInfo; |
| 613 | |
| 614 | if (!(*pDbeScreenPriv->GetVisualInfo) (pScreen, &pScrVisInfo[i])) { |
| 615 | /* We failed to alloc pScrVisInfo[i].visinfo. */ |
| 616 | rc = BadAlloc; |
| 617 | |
| 618 | /* Free visinfos that we allocated for previous screen infos. */ |
| 619 | goto freeScrVisInfo; |
| 620 | } |
| 621 | |
| 622 | /* Account for n, number of xDbeVisInfo items in list. */ |
| 623 | length += sizeof(CARD32); |
| 624 | |
| 625 | /* Account for n xDbeVisInfo items */ |
| 626 | length += pScrVisInfo[i].count * sizeof(xDbeVisInfo); |
| 627 | } |
| 628 | |
| 629 | rep = (xDbeGetVisualInfoReply) { |
| 630 | .type = X_Reply, |
| 631 | .sequenceNumber = client->sequence, |
| 632 | .length = bytes_to_int32(length), |
| 633 | .m = count |
| 634 | }; |
| 635 | |
| 636 | if (client->swapped) { |
| 637 | swaps(&rep.sequenceNumber); |
| 638 | swapl(&rep.length); |
| 639 | swapl(&rep.m); |
| 640 | } |
| 641 | |
| 642 | /* Send off reply. */ |
| 643 | WriteToClient(client, sizeof(xDbeGetVisualInfoReply), &rep); |
| 644 | |
| 645 | for (i = 0; i < count; i++) { |
| 646 | CARD32 data32; |
| 647 | |
| 648 | /* For each screen in the reply, send off the visual info */ |
| 649 | |
| 650 | /* Send off number of visuals. */ |
| 651 | data32 = (CARD32) pScrVisInfo[i].count; |
| 652 | |
| 653 | if (client->swapped) { |
| 654 | swapl(&data32); |
| 655 | } |
| 656 | |
| 657 | WriteToClient(client, sizeof(CARD32), &data32); |
| 658 | |
| 659 | /* Now send off visual info items. */ |
| 660 | for (j = 0; j < pScrVisInfo[i].count; j++) { |
| 661 | xDbeVisInfo visInfo; |
| 662 | |
| 663 | /* Copy the data in the client data structure to a protocol |
| 664 | * data structure. We will send data to the client from the |
| 665 | * protocol data structure. |
| 666 | */ |
| 667 | |
| 668 | visInfo.visualID = (CARD32) pScrVisInfo[i].visinfo[j].visual; |
| 669 | visInfo.depth = (CARD8) pScrVisInfo[i].visinfo[j].depth; |
| 670 | visInfo.perfLevel = (CARD8) pScrVisInfo[i].visinfo[j].perflevel; |
| 671 | |
| 672 | if (client->swapped) { |
| 673 | swapl(&visInfo.visualID); |
| 674 | |
| 675 | /* We do not need to swap depth and perfLevel since they are |
| 676 | * already 1 byte quantities. |
| 677 | */ |
| 678 | } |
| 679 | |
| 680 | /* Write visualID(32), depth(8), perfLevel(8), and pad(16). */ |
| 681 | WriteToClient(client, 2 * sizeof(CARD32), &visInfo.visualID); |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | rc = Success; |
| 686 | |
| 687 | freeScrVisInfo: |
| 688 | /* Clean up memory. */ |
| 689 | for (i = 0; i < count; i++) { |
| 690 | free(pScrVisInfo[i].visinfo); |
| 691 | } |
| 692 | free(pScrVisInfo); |
| 693 | |
| 694 | free(pDrawables); |
| 695 | |
| 696 | return rc; |
| 697 | |
| 698 | } /* ProcDbeGetVisualInfo() */ |
| 699 | \f |
| 700 | /****************************************************************************** |
| 701 | * |
| 702 | * DBE DIX Procedure: ProcDbeGetbackBufferAttributes |
| 703 | * |
| 704 | * Description: |
| 705 | * |
| 706 | * This function is for processing a ProcDbeGetbackBufferAttributes |
| 707 | * request. This request returns information about a back buffer. |
| 708 | * |
| 709 | * Return Values: |
| 710 | * |
| 711 | * Success |
| 712 | * |
| 713 | *****************************************************************************/ |
| 714 | |
| 715 | static int |
| 716 | ProcDbeGetBackBufferAttributes(ClientPtr client) |
| 717 | { |
| 718 | REQUEST(xDbeGetBackBufferAttributesReq); |
| 719 | xDbeGetBackBufferAttributesReply rep = { |
| 720 | .type = X_Reply, |
| 721 | .sequenceNumber = client->sequence, |
| 722 | .length = 0 |
| 723 | }; |
| 724 | DbeWindowPrivPtr pDbeWindowPriv; |
| 725 | int rc; |
| 726 | |
| 727 | REQUEST_SIZE_MATCH(xDbeGetBackBufferAttributesReq); |
| 728 | |
| 729 | rc = dixLookupResourceByType((pointer *) &pDbeWindowPriv, stuff->buffer, |
| 730 | dbeWindowPrivResType, client, |
| 731 | DixGetAttrAccess); |
| 732 | if (rc == Success) { |
| 733 | rep.attributes = pDbeWindowPriv->pWindow->drawable.id; |
| 734 | } |
| 735 | else { |
| 736 | rep.attributes = None; |
| 737 | } |
| 738 | |
| 739 | if (client->swapped) { |
| 740 | swaps(&rep.sequenceNumber); |
| 741 | swapl(&rep.length); |
| 742 | swapl(&rep.attributes); |
| 743 | } |
| 744 | |
| 745 | WriteToClient(client, sizeof(xDbeGetBackBufferAttributesReply), &rep); |
| 746 | return Success; |
| 747 | |
| 748 | } /* ProcDbeGetbackBufferAttributes() */ |
| 749 | \f |
| 750 | /****************************************************************************** |
| 751 | * |
| 752 | * DBE DIX Procedure: ProcDbeDispatch |
| 753 | * |
| 754 | * Description: |
| 755 | * |
| 756 | * This function dispatches DBE requests. |
| 757 | * |
| 758 | *****************************************************************************/ |
| 759 | |
| 760 | static int |
| 761 | ProcDbeDispatch(ClientPtr client) |
| 762 | { |
| 763 | REQUEST(xReq); |
| 764 | |
| 765 | switch (stuff->data) { |
| 766 | case X_DbeGetVersion: |
| 767 | return (ProcDbeGetVersion(client)); |
| 768 | |
| 769 | case X_DbeAllocateBackBufferName: |
| 770 | return (ProcDbeAllocateBackBufferName(client)); |
| 771 | |
| 772 | case X_DbeDeallocateBackBufferName: |
| 773 | return (ProcDbeDeallocateBackBufferName(client)); |
| 774 | |
| 775 | case X_DbeSwapBuffers: |
| 776 | return (ProcDbeSwapBuffers(client)); |
| 777 | |
| 778 | case X_DbeBeginIdiom: |
| 779 | return Success; |
| 780 | |
| 781 | case X_DbeEndIdiom: |
| 782 | return Success; |
| 783 | |
| 784 | case X_DbeGetVisualInfo: |
| 785 | return (ProcDbeGetVisualInfo(client)); |
| 786 | |
| 787 | case X_DbeGetBackBufferAttributes: |
| 788 | return (ProcDbeGetBackBufferAttributes(client)); |
| 789 | |
| 790 | default: |
| 791 | return BadRequest; |
| 792 | } |
| 793 | |
| 794 | } /* ProcDbeDispatch() */ |
| 795 | \f |
| 796 | /****************************************************************************** |
| 797 | * |
| 798 | * DBE DIX Procedure: SProcDbeGetVersion |
| 799 | * |
| 800 | * Description: |
| 801 | * |
| 802 | * This function is for processing a DbeGetVersion request on a swapped |
| 803 | * server. This request returns the major and minor version numbers of |
| 804 | * this extension. |
| 805 | * |
| 806 | * Return Values: |
| 807 | * |
| 808 | * Success |
| 809 | * |
| 810 | *****************************************************************************/ |
| 811 | |
| 812 | static int |
| 813 | SProcDbeGetVersion(ClientPtr client) |
| 814 | { |
| 815 | REQUEST(xDbeGetVersionReq); |
| 816 | |
| 817 | swaps(&stuff->length); |
| 818 | return (ProcDbeGetVersion(client)); |
| 819 | |
| 820 | } /* SProcDbeGetVersion() */ |
| 821 | \f |
| 822 | /****************************************************************************** |
| 823 | * |
| 824 | * DBE DIX Procedure: SProcDbeAllocateBackBufferName |
| 825 | * |
| 826 | * Description: |
| 827 | * |
| 828 | * This function is for processing a DbeAllocateBackBufferName request on |
| 829 | * a swapped server. This request allocates a drawable ID used to refer |
| 830 | * to the back buffer of a window. |
| 831 | * |
| 832 | * Return Values: |
| 833 | * |
| 834 | * BadAlloc - server can not allocate resources |
| 835 | * BadIDChoice - id is out of range for client; id is already in use |
| 836 | * BadMatch - window is not an InputOutput window; |
| 837 | * visual of window is not on list returned by |
| 838 | * DBEGetVisualInfo; |
| 839 | * BadValue - invalid swap action is specified |
| 840 | * BadWindow - window is not a valid window |
| 841 | * Success |
| 842 | * |
| 843 | *****************************************************************************/ |
| 844 | |
| 845 | static int |
| 846 | SProcDbeAllocateBackBufferName(ClientPtr client) |
| 847 | { |
| 848 | REQUEST(xDbeAllocateBackBufferNameReq); |
| 849 | |
| 850 | swaps(&stuff->length); |
| 851 | REQUEST_SIZE_MATCH(xDbeAllocateBackBufferNameReq); |
| 852 | |
| 853 | swapl(&stuff->window); |
| 854 | swapl(&stuff->buffer); |
| 855 | /* stuff->swapAction is a byte. We do not need to swap this field. */ |
| 856 | |
| 857 | return (ProcDbeAllocateBackBufferName(client)); |
| 858 | |
| 859 | } /* SProcDbeAllocateBackBufferName() */ |
| 860 | \f |
| 861 | /****************************************************************************** |
| 862 | * |
| 863 | * DBE DIX Procedure: SProcDbeDeallocateBackBufferName |
| 864 | * |
| 865 | * Description: |
| 866 | * |
| 867 | * This function is for processing a DbeDeallocateBackBufferName request |
| 868 | * on a swapped server. This request frees a drawable ID that was |
| 869 | * obtained by a DbeAllocateBackBufferName request. |
| 870 | * |
| 871 | * Return Values: |
| 872 | * |
| 873 | * BadBuffer - buffer to deallocate is not associated with a window |
| 874 | * Success |
| 875 | * |
| 876 | *****************************************************************************/ |
| 877 | |
| 878 | static int |
| 879 | SProcDbeDeallocateBackBufferName(ClientPtr client) |
| 880 | { |
| 881 | REQUEST(xDbeDeallocateBackBufferNameReq); |
| 882 | |
| 883 | swaps(&stuff->length); |
| 884 | REQUEST_SIZE_MATCH(xDbeDeallocateBackBufferNameReq); |
| 885 | |
| 886 | swapl(&stuff->buffer); |
| 887 | |
| 888 | return (ProcDbeDeallocateBackBufferName(client)); |
| 889 | |
| 890 | } /* SProcDbeDeallocateBackBufferName() */ |
| 891 | \f |
| 892 | /****************************************************************************** |
| 893 | * |
| 894 | * DBE DIX Procedure: SProcDbeSwapBuffers |
| 895 | * |
| 896 | * Description: |
| 897 | * |
| 898 | * This function is for processing a DbeSwapBuffers request on a swapped |
| 899 | * server. This request swaps the buffers for all windows listed, |
| 900 | * applying the appropriate swap action for each window. |
| 901 | * |
| 902 | * Return Values: |
| 903 | * |
| 904 | * BadMatch - a window in request is not double-buffered; a window in |
| 905 | * request is listed more than once; all windows in request do |
| 906 | * not have the same root |
| 907 | * BadValue - invalid swap action is specified |
| 908 | * BadWindow - a window in request is not valid |
| 909 | * Success |
| 910 | * |
| 911 | *****************************************************************************/ |
| 912 | |
| 913 | static int |
| 914 | SProcDbeSwapBuffers(ClientPtr client) |
| 915 | { |
| 916 | REQUEST(xDbeSwapBuffersReq); |
| 917 | register int i; |
| 918 | xDbeSwapInfo *pSwapInfo; |
| 919 | |
| 920 | swaps(&stuff->length); |
| 921 | REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq); |
| 922 | |
| 923 | swapl(&stuff->n); |
| 924 | |
| 925 | if (stuff->n != 0) { |
| 926 | pSwapInfo = (xDbeSwapInfo *) stuff + 1; |
| 927 | |
| 928 | /* The swap info following the fix part of this request is a window(32) |
| 929 | * followed by a 1 byte swap action and then 3 pad bytes. We only need |
| 930 | * to swap the window information. |
| 931 | */ |
| 932 | for (i = 0; i < stuff->n; i++) { |
| 933 | swapl(&pSwapInfo->window); |
| 934 | } |
| 935 | } |
| 936 | |
| 937 | return (ProcDbeSwapBuffers(client)); |
| 938 | |
| 939 | } /* SProcDbeSwapBuffers() */ |
| 940 | \f |
| 941 | /****************************************************************************** |
| 942 | * |
| 943 | * DBE DIX Procedure: SProcDbeGetVisualInfo |
| 944 | * |
| 945 | * Description: |
| 946 | * |
| 947 | * This function is for processing a ProcDbeGetVisualInfo request on a |
| 948 | * swapped server. This request returns information about which visuals |
| 949 | * support double buffering. |
| 950 | * |
| 951 | * Return Values: |
| 952 | * |
| 953 | * BadDrawable - value in screen specifiers is not a valid drawable |
| 954 | * Success |
| 955 | * |
| 956 | *****************************************************************************/ |
| 957 | |
| 958 | static int |
| 959 | SProcDbeGetVisualInfo(ClientPtr client) |
| 960 | { |
| 961 | REQUEST(xDbeGetVisualInfoReq); |
| 962 | |
| 963 | swaps(&stuff->length); |
| 964 | REQUEST_AT_LEAST_SIZE(xDbeGetVisualInfoReq); |
| 965 | |
| 966 | swapl(&stuff->n); |
| 967 | SwapRestL(stuff); |
| 968 | |
| 969 | return (ProcDbeGetVisualInfo(client)); |
| 970 | |
| 971 | } /* SProcDbeGetVisualInfo() */ |
| 972 | \f |
| 973 | /****************************************************************************** |
| 974 | * |
| 975 | * DBE DIX Procedure: SProcDbeGetbackBufferAttributes |
| 976 | * |
| 977 | * Description: |
| 978 | * |
| 979 | * This function is for processing a ProcDbeGetbackBufferAttributes |
| 980 | * request on a swapped server. This request returns information about a |
| 981 | * back buffer. |
| 982 | * |
| 983 | * Return Values: |
| 984 | * |
| 985 | * Success |
| 986 | * |
| 987 | *****************************************************************************/ |
| 988 | |
| 989 | static int |
| 990 | SProcDbeGetBackBufferAttributes(ClientPtr client) |
| 991 | { |
| 992 | REQUEST(xDbeGetBackBufferAttributesReq); |
| 993 | |
| 994 | swaps(&stuff->length); |
| 995 | REQUEST_SIZE_MATCH(xDbeGetBackBufferAttributesReq); |
| 996 | |
| 997 | swapl(&stuff->buffer); |
| 998 | |
| 999 | return (ProcDbeGetBackBufferAttributes(client)); |
| 1000 | |
| 1001 | } /* SProcDbeGetBackBufferAttributes() */ |
| 1002 | \f |
| 1003 | /****************************************************************************** |
| 1004 | * |
| 1005 | * DBE DIX Procedure: SProcDbeDispatch |
| 1006 | * |
| 1007 | * Description: |
| 1008 | * |
| 1009 | * This function dispatches DBE requests on a swapped server. |
| 1010 | * |
| 1011 | *****************************************************************************/ |
| 1012 | |
| 1013 | static int |
| 1014 | SProcDbeDispatch(ClientPtr client) |
| 1015 | { |
| 1016 | REQUEST(xReq); |
| 1017 | |
| 1018 | switch (stuff->data) { |
| 1019 | case X_DbeGetVersion: |
| 1020 | return (SProcDbeGetVersion(client)); |
| 1021 | |
| 1022 | case X_DbeAllocateBackBufferName: |
| 1023 | return (SProcDbeAllocateBackBufferName(client)); |
| 1024 | |
| 1025 | case X_DbeDeallocateBackBufferName: |
| 1026 | return (SProcDbeDeallocateBackBufferName(client)); |
| 1027 | |
| 1028 | case X_DbeSwapBuffers: |
| 1029 | return (SProcDbeSwapBuffers(client)); |
| 1030 | |
| 1031 | case X_DbeBeginIdiom: |
| 1032 | return Success; |
| 1033 | |
| 1034 | case X_DbeEndIdiom: |
| 1035 | return Success; |
| 1036 | |
| 1037 | case X_DbeGetVisualInfo: |
| 1038 | return (SProcDbeGetVisualInfo(client)); |
| 1039 | |
| 1040 | case X_DbeGetBackBufferAttributes: |
| 1041 | return (SProcDbeGetBackBufferAttributes(client)); |
| 1042 | |
| 1043 | default: |
| 1044 | return BadRequest; |
| 1045 | } |
| 1046 | |
| 1047 | } /* SProcDbeDispatch() */ |
| 1048 | \f |
| 1049 | /****************************************************************************** |
| 1050 | * |
| 1051 | * DBE DIX Procedure: DbeSetupBackgroundPainter |
| 1052 | * |
| 1053 | * Description: |
| 1054 | * |
| 1055 | * This function sets up pGC to clear pixmaps. |
| 1056 | * |
| 1057 | * Return Values: |
| 1058 | * |
| 1059 | * TRUE - setup was successful |
| 1060 | * FALSE - the window's background state is NONE |
| 1061 | * |
| 1062 | *****************************************************************************/ |
| 1063 | |
| 1064 | static Bool |
| 1065 | DbeSetupBackgroundPainter(WindowPtr pWin, GCPtr pGC) |
| 1066 | { |
| 1067 | ChangeGCVal gcvalues[4]; |
| 1068 | int ts_x_origin, ts_y_origin; |
| 1069 | PixUnion background; |
| 1070 | int backgroundState; |
| 1071 | Mask gcmask; |
| 1072 | |
| 1073 | /* First take care of any ParentRelative stuff by altering the |
| 1074 | * tile/stipple origin to match the coordinates of the upper-left |
| 1075 | * corner of the first ancestor without a ParentRelative background. |
| 1076 | * This coordinate is, of course, negative. |
| 1077 | */ |
| 1078 | ts_x_origin = ts_y_origin = 0; |
| 1079 | while (pWin->backgroundState == ParentRelative) { |
| 1080 | ts_x_origin -= pWin->origin.x; |
| 1081 | ts_y_origin -= pWin->origin.y; |
| 1082 | |
| 1083 | pWin = pWin->parent; |
| 1084 | } |
| 1085 | backgroundState = pWin->backgroundState; |
| 1086 | background = pWin->background; |
| 1087 | |
| 1088 | switch (backgroundState) { |
| 1089 | case BackgroundPixel: |
| 1090 | gcvalues[0].val = background.pixel; |
| 1091 | gcvalues[1].val = FillSolid; |
| 1092 | gcmask = GCForeground | GCFillStyle; |
| 1093 | break; |
| 1094 | |
| 1095 | case BackgroundPixmap: |
| 1096 | gcvalues[0].val = FillTiled; |
| 1097 | gcvalues[1].ptr = background.pixmap; |
| 1098 | gcvalues[2].val = ts_x_origin; |
| 1099 | gcvalues[3].val = ts_y_origin; |
| 1100 | gcmask = GCFillStyle | GCTile | GCTileStipXOrigin | GCTileStipYOrigin; |
| 1101 | break; |
| 1102 | |
| 1103 | default: |
| 1104 | /* pWin->backgroundState == None */ |
| 1105 | return FALSE; |
| 1106 | } |
| 1107 | |
| 1108 | return ChangeGC(NullClient, pGC, gcmask, gcvalues) == 0; |
| 1109 | } /* DbeSetupBackgroundPainter() */ |
| 1110 | \f |
| 1111 | /****************************************************************************** |
| 1112 | * |
| 1113 | * DBE DIX Procedure: DbeDrawableDelete |
| 1114 | * |
| 1115 | * Description: |
| 1116 | * |
| 1117 | * This is the resource delete function for dbeDrawableResType. |
| 1118 | * It is registered when the drawable resource type is created in |
| 1119 | * DbeExtensionInit(). |
| 1120 | * |
| 1121 | * To make resource deletion simple, we do not do anything in this function |
| 1122 | * and leave all resource deleteion to DbeWindowPrivDelete(), which will |
| 1123 | * eventually be called or already has been called. Deletion functions are |
| 1124 | * not guaranteed to be called in any particular order. |
| 1125 | * |
| 1126 | *****************************************************************************/ |
| 1127 | static int |
| 1128 | DbeDrawableDelete(pointer pDrawable, XID id) |
| 1129 | { |
| 1130 | return Success; |
| 1131 | |
| 1132 | } /* DbeDrawableDelete() */ |
| 1133 | \f |
| 1134 | /****************************************************************************** |
| 1135 | * |
| 1136 | * DBE DIX Procedure: DbeWindowPrivDelete |
| 1137 | * |
| 1138 | * Description: |
| 1139 | * |
| 1140 | * This is the resource delete function for dbeWindowPrivResType. |
| 1141 | * It is registered when the drawable resource type is created in |
| 1142 | * DbeExtensionInit(). |
| 1143 | * |
| 1144 | *****************************************************************************/ |
| 1145 | static int |
| 1146 | DbeWindowPrivDelete(pointer pDbeWinPriv, XID id) |
| 1147 | { |
| 1148 | DbeScreenPrivPtr pDbeScreenPriv; |
| 1149 | DbeWindowPrivPtr pDbeWindowPriv = (DbeWindowPrivPtr) pDbeWinPriv; |
| 1150 | int i; |
| 1151 | |
| 1152 | /* |
| 1153 | ************************************************************************** |
| 1154 | ** Remove the buffer ID from the ID array. |
| 1155 | ************************************************************************** |
| 1156 | */ |
| 1157 | |
| 1158 | /* Find the ID in the ID array. */ |
| 1159 | i = 0; |
| 1160 | while ((i < pDbeWindowPriv->nBufferIDs) && (pDbeWindowPriv->IDs[i] != id)) { |
| 1161 | i++; |
| 1162 | } |
| 1163 | |
| 1164 | if (i == pDbeWindowPriv->nBufferIDs) { |
| 1165 | /* We did not find the ID in the array. We should never get here. */ |
| 1166 | return BadValue; |
| 1167 | } |
| 1168 | |
| 1169 | /* Remove the ID from the array. */ |
| 1170 | |
| 1171 | if (i < (pDbeWindowPriv->nBufferIDs - 1)) { |
| 1172 | /* Compress the buffer ID array, overwriting the ID in the process. */ |
| 1173 | memmove(&pDbeWindowPriv->IDs[i], &pDbeWindowPriv->IDs[i + 1], |
| 1174 | (pDbeWindowPriv->nBufferIDs - i - 1) * sizeof(XID)); |
| 1175 | } |
| 1176 | else { |
| 1177 | /* We are removing the last ID in the array, in which case, the |
| 1178 | * assignement below is all that we need to do. |
| 1179 | */ |
| 1180 | } |
| 1181 | pDbeWindowPriv->IDs[pDbeWindowPriv->nBufferIDs - 1] = DBE_FREE_ID_ELEMENT; |
| 1182 | |
| 1183 | pDbeWindowPriv->nBufferIDs--; |
| 1184 | |
| 1185 | /* If an extended array was allocated, then check to see if the remaining |
| 1186 | * buffer IDs will fit in the static array. |
| 1187 | */ |
| 1188 | |
| 1189 | if ((pDbeWindowPriv->maxAvailableIDs > DBE_INIT_MAX_IDS) && |
| 1190 | (pDbeWindowPriv->nBufferIDs == DBE_INIT_MAX_IDS)) { |
| 1191 | /* Copy the IDs back into the static array. */ |
| 1192 | memcpy(pDbeWindowPriv->initIDs, pDbeWindowPriv->IDs, |
| 1193 | DBE_INIT_MAX_IDS * sizeof(XID)); |
| 1194 | |
| 1195 | /* Free the extended array; use the static array. */ |
| 1196 | free(pDbeWindowPriv->IDs); |
| 1197 | pDbeWindowPriv->IDs = pDbeWindowPriv->initIDs; |
| 1198 | pDbeWindowPriv->maxAvailableIDs = DBE_INIT_MAX_IDS; |
| 1199 | } |
| 1200 | |
| 1201 | /* |
| 1202 | ************************************************************************** |
| 1203 | ** Perform DDX level tasks. |
| 1204 | ************************************************************************** |
| 1205 | */ |
| 1206 | |
| 1207 | pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW_PRIV((DbeWindowPrivPtr) |
| 1208 | pDbeWindowPriv); |
| 1209 | (*pDbeScreenPriv->WinPrivDelete) ((DbeWindowPrivPtr) pDbeWindowPriv, id); |
| 1210 | |
| 1211 | /* |
| 1212 | ************************************************************************** |
| 1213 | ** Perform miscellaneous tasks if this is the last buffer associated |
| 1214 | ** with the window. |
| 1215 | ************************************************************************** |
| 1216 | */ |
| 1217 | |
| 1218 | if (pDbeWindowPriv->nBufferIDs == 0) { |
| 1219 | /* Reset the DBE window priv pointer. */ |
| 1220 | dixSetPrivate(&pDbeWindowPriv->pWindow->devPrivates, dbeWindowPrivKey, |
| 1221 | NULL); |
| 1222 | |
| 1223 | /* We are done with the window priv. */ |
| 1224 | free(pDbeWindowPriv); |
| 1225 | } |
| 1226 | |
| 1227 | return Success; |
| 1228 | |
| 1229 | } /* DbeWindowPrivDelete() */ |
| 1230 | \f |
| 1231 | /****************************************************************************** |
| 1232 | * |
| 1233 | * DBE DIX Procedure: DbeResetProc |
| 1234 | * |
| 1235 | * Description: |
| 1236 | * |
| 1237 | * This routine is called at the end of every server generation. |
| 1238 | * It deallocates any memory reserved for the extension and performs any |
| 1239 | * other tasks related to shutting down the extension. |
| 1240 | * |
| 1241 | *****************************************************************************/ |
| 1242 | static void |
| 1243 | DbeResetProc(ExtensionEntry * extEntry) |
| 1244 | { |
| 1245 | int i; |
| 1246 | ScreenPtr pScreen; |
| 1247 | DbeScreenPrivPtr pDbeScreenPriv; |
| 1248 | |
| 1249 | for (i = 0; i < screenInfo.numScreens; i++) { |
| 1250 | pScreen = screenInfo.screens[i]; |
| 1251 | pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); |
| 1252 | |
| 1253 | if (pDbeScreenPriv) { |
| 1254 | /* Unwrap DestroyWindow, which was wrapped in DbeExtensionInit(). */ |
| 1255 | pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow; |
| 1256 | pScreen->PositionWindow = pDbeScreenPriv->PositionWindow; |
| 1257 | free(pDbeScreenPriv); |
| 1258 | } |
| 1259 | } |
| 1260 | } /* DbeResetProc() */ |
| 1261 | \f |
| 1262 | /****************************************************************************** |
| 1263 | * |
| 1264 | * DBE DIX Procedure: DbeDestroyWindow |
| 1265 | * |
| 1266 | * Description: |
| 1267 | * |
| 1268 | * This is the wrapper for pScreen->DestroyWindow. |
| 1269 | * This function frees buffer resources for a window before it is |
| 1270 | * destroyed. |
| 1271 | * |
| 1272 | *****************************************************************************/ |
| 1273 | |
| 1274 | static Bool |
| 1275 | DbeDestroyWindow(WindowPtr pWin) |
| 1276 | { |
| 1277 | DbeScreenPrivPtr pDbeScreenPriv; |
| 1278 | DbeWindowPrivPtr pDbeWindowPriv; |
| 1279 | ScreenPtr pScreen; |
| 1280 | Bool ret; |
| 1281 | |
| 1282 | /* |
| 1283 | ************************************************************************** |
| 1284 | ** 1. Unwrap the member routine. |
| 1285 | ************************************************************************** |
| 1286 | */ |
| 1287 | |
| 1288 | pScreen = pWin->drawable.pScreen; |
| 1289 | pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); |
| 1290 | pScreen->DestroyWindow = pDbeScreenPriv->DestroyWindow; |
| 1291 | |
| 1292 | /* |
| 1293 | ************************************************************************** |
| 1294 | ** 2. Do any work necessary before the member routine is called. |
| 1295 | ** |
| 1296 | ** Call the window priv delete function for all buffer IDs associated |
| 1297 | ** with this window. |
| 1298 | ************************************************************************** |
| 1299 | */ |
| 1300 | |
| 1301 | if ((pDbeWindowPriv = DBE_WINDOW_PRIV(pWin))) { |
| 1302 | while (pDbeWindowPriv) { |
| 1303 | /* *DbeWinPrivDelete() will free the window private and set it to |
| 1304 | * NULL if there are no more buffer IDs associated with this |
| 1305 | * window. |
| 1306 | */ |
| 1307 | FreeResource(pDbeWindowPriv->IDs[0], RT_NONE); |
| 1308 | pDbeWindowPriv = DBE_WINDOW_PRIV(pWin); |
| 1309 | } |
| 1310 | } |
| 1311 | |
| 1312 | /* |
| 1313 | ************************************************************************** |
| 1314 | ** 3. Call the member routine, saving its result if necessary. |
| 1315 | ************************************************************************** |
| 1316 | */ |
| 1317 | |
| 1318 | ret = (*pScreen->DestroyWindow) (pWin); |
| 1319 | |
| 1320 | /* |
| 1321 | ************************************************************************** |
| 1322 | ** 4. Rewrap the member routine, restoring the wrapper value first in case |
| 1323 | ** the wrapper (or something that it wrapped) change this value. |
| 1324 | ************************************************************************** |
| 1325 | */ |
| 1326 | |
| 1327 | pDbeScreenPriv->DestroyWindow = pScreen->DestroyWindow; |
| 1328 | pScreen->DestroyWindow = DbeDestroyWindow; |
| 1329 | |
| 1330 | /* |
| 1331 | ************************************************************************** |
| 1332 | ** 5. Do any work necessary after the member routine has been called. |
| 1333 | ** |
| 1334 | ** In this case we do not need to do anything. |
| 1335 | ************************************************************************** |
| 1336 | */ |
| 1337 | |
| 1338 | return ret; |
| 1339 | |
| 1340 | } /* DbeDestroyWindow() */ |
| 1341 | \f |
| 1342 | /****************************************************************************** |
| 1343 | * |
| 1344 | * DBE DIX Procedure: DbeExtensionInit |
| 1345 | * |
| 1346 | * Description: |
| 1347 | * |
| 1348 | * Called from InitExtensions in main() |
| 1349 | * |
| 1350 | *****************************************************************************/ |
| 1351 | |
| 1352 | void |
| 1353 | DbeExtensionInit(void) |
| 1354 | { |
| 1355 | ExtensionEntry *extEntry; |
| 1356 | register int i, j; |
| 1357 | ScreenPtr pScreen = NULL; |
| 1358 | DbeScreenPrivPtr pDbeScreenPriv; |
| 1359 | int nStubbedScreens = 0; |
| 1360 | Bool ddxInitSuccess; |
| 1361 | |
| 1362 | #ifdef PANORAMIX |
| 1363 | if (!noPanoramiXExtension) |
| 1364 | return; |
| 1365 | #endif |
| 1366 | |
| 1367 | /* Create the resource types. */ |
| 1368 | dbeDrawableResType = |
| 1369 | CreateNewResourceType(DbeDrawableDelete, "dbeDrawable"); |
| 1370 | if (!dbeDrawableResType) |
| 1371 | return; |
| 1372 | dbeDrawableResType |= RC_DRAWABLE; |
| 1373 | |
| 1374 | dbeWindowPrivResType = |
| 1375 | CreateNewResourceType(DbeWindowPrivDelete, "dbeWindow"); |
| 1376 | if (!dbeWindowPrivResType) |
| 1377 | return; |
| 1378 | |
| 1379 | if (!dixRegisterPrivateKey(&dbeScreenPrivKeyRec, PRIVATE_SCREEN, 0)) |
| 1380 | return; |
| 1381 | |
| 1382 | if (!dixRegisterPrivateKey(&dbeWindowPrivKeyRec, PRIVATE_WINDOW, 0)) |
| 1383 | return; |
| 1384 | |
| 1385 | for (i = 0; i < screenInfo.numScreens; i++) { |
| 1386 | /* For each screen, set up DBE screen privates and init DIX and DDX |
| 1387 | * interface. |
| 1388 | */ |
| 1389 | |
| 1390 | pScreen = screenInfo.screens[i]; |
| 1391 | |
| 1392 | if (!(pDbeScreenPriv = malloc(sizeof(DbeScreenPrivRec)))) { |
| 1393 | /* If we can not alloc a window or screen private, |
| 1394 | * then free any privates that we already alloc'ed and return |
| 1395 | */ |
| 1396 | |
| 1397 | for (j = 0; j < i; j++) { |
| 1398 | free(dixLookupPrivate(&screenInfo.screens[j]->devPrivates, |
| 1399 | dbeScreenPrivKey)); |
| 1400 | dixSetPrivate(&screenInfo.screens[j]->devPrivates, |
| 1401 | dbeScreenPrivKey, NULL); |
| 1402 | } |
| 1403 | return; |
| 1404 | } |
| 1405 | |
| 1406 | dixSetPrivate(&pScreen->devPrivates, dbeScreenPrivKey, pDbeScreenPriv); |
| 1407 | |
| 1408 | { |
| 1409 | /* We don't have DDX support for DBE anymore */ |
| 1410 | |
| 1411 | #ifndef DISABLE_MI_DBE_BY_DEFAULT |
| 1412 | /* Setup DIX. */ |
| 1413 | pDbeScreenPriv->SetupBackgroundPainter = DbeSetupBackgroundPainter; |
| 1414 | |
| 1415 | /* Setup DDX. */ |
| 1416 | ddxInitSuccess = miDbeInit(pScreen, pDbeScreenPriv); |
| 1417 | |
| 1418 | /* DDX DBE initialization may have the side affect of |
| 1419 | * reallocating pDbeScreenPriv, so we need to update it. |
| 1420 | */ |
| 1421 | pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); |
| 1422 | |
| 1423 | if (ddxInitSuccess) { |
| 1424 | /* Wrap DestroyWindow. The DDX initialization function |
| 1425 | * already wrapped PositionWindow for us. |
| 1426 | */ |
| 1427 | |
| 1428 | pDbeScreenPriv->DestroyWindow = pScreen->DestroyWindow; |
| 1429 | pScreen->DestroyWindow = DbeDestroyWindow; |
| 1430 | } |
| 1431 | else { |
| 1432 | /* DDX initialization failed. Stub the screen. */ |
| 1433 | DbeStubScreen(pDbeScreenPriv, &nStubbedScreens); |
| 1434 | } |
| 1435 | #else |
| 1436 | DbeStubScreen(pDbeScreenPriv, &nStubbedScreens); |
| 1437 | #endif |
| 1438 | |
| 1439 | } |
| 1440 | |
| 1441 | } /* for (i = 0; i < screenInfo.numScreens; i++) */ |
| 1442 | |
| 1443 | if (nStubbedScreens == screenInfo.numScreens) { |
| 1444 | /* All screens stubbed. Clean up and return. */ |
| 1445 | |
| 1446 | for (i = 0; i < screenInfo.numScreens; i++) { |
| 1447 | free(dixLookupPrivate(&screenInfo.screens[i]->devPrivates, |
| 1448 | dbeScreenPrivKey)); |
| 1449 | dixSetPrivate(&pScreen->devPrivates, dbeScreenPrivKey, NULL); |
| 1450 | } |
| 1451 | return; |
| 1452 | } |
| 1453 | |
| 1454 | /* Now add the extension. */ |
| 1455 | extEntry = AddExtension(DBE_PROTOCOL_NAME, DbeNumberEvents, |
| 1456 | DbeNumberErrors, ProcDbeDispatch, SProcDbeDispatch, |
| 1457 | DbeResetProc, StandardMinorOpcode); |
| 1458 | |
| 1459 | dbeErrorBase = extEntry->errorBase; |
| 1460 | SetResourceTypeErrorValue(dbeWindowPrivResType, |
| 1461 | dbeErrorBase + DbeBadBuffer); |
| 1462 | SetResourceTypeErrorValue(dbeDrawableResType, dbeErrorBase + DbeBadBuffer); |
| 1463 | |
| 1464 | } /* DbeExtensionInit() */ |