| 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 | * Machine-independent DBE code |
| 30 | * |
| 31 | *****************************************************************************/ |
| 32 | |
| 33 | /* INCLUDES */ |
| 34 | |
| 35 | #ifdef HAVE_DIX_CONFIG_H |
| 36 | #include <dix-config.h> |
| 37 | #endif |
| 38 | |
| 39 | #include <X11/X.h> |
| 40 | #include <X11/Xproto.h> |
| 41 | #include "misc.h" |
| 42 | #include "os.h" |
| 43 | #include "windowstr.h" |
| 44 | #include "scrnintstr.h" |
| 45 | #include "pixmapstr.h" |
| 46 | #include "extnsionst.h" |
| 47 | #include "dixstruct.h" |
| 48 | #include "resource.h" |
| 49 | #include "opaque.h" |
| 50 | #include "dbestruct.h" |
| 51 | #include "regionstr.h" |
| 52 | #include "gcstruct.h" |
| 53 | #include "inputstr.h" |
| 54 | #include "midbe.h" |
| 55 | #include "xace.h" |
| 56 | |
| 57 | #include <stdio.h> |
| 58 | |
| 59 | \f |
| 60 | /****************************************************************************** |
| 61 | * |
| 62 | * DBE MI Procedure: miDbeGetVisualInfo |
| 63 | * |
| 64 | * Description: |
| 65 | * |
| 66 | * This is the MI function for the DbeGetVisualInfo request. This function |
| 67 | * is called through pDbeScreenPriv->GetVisualInfo. This function is also |
| 68 | * called for the DbeAllocateBackBufferName request at the extension level; |
| 69 | * it is called by ProcDbeAllocateBackBufferName() in dbe.c. |
| 70 | * |
| 71 | * If memory allocation fails or we can not get the visual info, this |
| 72 | * function returns FALSE. Otherwise, it returns TRUE for success. |
| 73 | * |
| 74 | *****************************************************************************/ |
| 75 | |
| 76 | static Bool |
| 77 | miDbeGetVisualInfo(ScreenPtr pScreen, XdbeScreenVisualInfo * pScrVisInfo) |
| 78 | { |
| 79 | register int i, j, k; |
| 80 | register int count; |
| 81 | DepthPtr pDepth; |
| 82 | XdbeVisualInfo *visInfo; |
| 83 | |
| 84 | /* Determine number of visuals for this screen. */ |
| 85 | for (i = 0, count = 0; i < pScreen->numDepths; i++) { |
| 86 | count += pScreen->allowedDepths[i].numVids; |
| 87 | } |
| 88 | |
| 89 | /* Allocate an array of XdbeVisualInfo items. */ |
| 90 | if (!(visInfo = (XdbeVisualInfo *) malloc(count * sizeof(XdbeVisualInfo)))) { |
| 91 | return FALSE; /* memory alloc failure */ |
| 92 | } |
| 93 | |
| 94 | for (i = 0, k = 0; i < pScreen->numDepths; i++) { |
| 95 | /* For each depth of this screen, get visual information. */ |
| 96 | |
| 97 | pDepth = &pScreen->allowedDepths[i]; |
| 98 | |
| 99 | for (j = 0; j < pDepth->numVids; j++) { |
| 100 | /* For each visual for this depth of this screen, get visual ID |
| 101 | * and visual depth. Since this is MI code, we will always return |
| 102 | * the same performance level for all visuals (0). A higher |
| 103 | * performance level value indicates higher performance. |
| 104 | */ |
| 105 | visInfo[k].visual = pDepth->vids[j]; |
| 106 | visInfo[k].depth = pDepth->depth; |
| 107 | visInfo[k].perflevel = 0; |
| 108 | k++; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | /* Record the number of visuals and point visual_depth to |
| 113 | * the array of visual info. |
| 114 | */ |
| 115 | pScrVisInfo->count = count; |
| 116 | pScrVisInfo->visinfo = visInfo; |
| 117 | |
| 118 | return TRUE; /* success */ |
| 119 | |
| 120 | } /* miDbeGetVisualInfo() */ |
| 121 | \f |
| 122 | /****************************************************************************** |
| 123 | * |
| 124 | * DBE MI Procedure: miAllocBackBufferName |
| 125 | * |
| 126 | * Description: |
| 127 | * |
| 128 | * This is the MI function for the DbeAllocateBackBufferName request. |
| 129 | * |
| 130 | *****************************************************************************/ |
| 131 | |
| 132 | static int |
| 133 | miDbeAllocBackBufferName(WindowPtr pWin, XID bufId, int swapAction) |
| 134 | { |
| 135 | ScreenPtr pScreen; |
| 136 | DbeWindowPrivPtr pDbeWindowPriv; |
| 137 | DbeScreenPrivPtr pDbeScreenPriv; |
| 138 | GCPtr pGC; |
| 139 | xRectangle clearRect; |
| 140 | int rc; |
| 141 | |
| 142 | pScreen = pWin->drawable.pScreen; |
| 143 | pDbeWindowPriv = DBE_WINDOW_PRIV(pWin); |
| 144 | |
| 145 | if (pDbeWindowPriv->nBufferIDs == 0) { |
| 146 | /* There is no buffer associated with the window. |
| 147 | * We have to create the window priv priv. Remember, the window |
| 148 | * priv was created at the DIX level, so all we need to do is |
| 149 | * create the priv priv and attach it to the priv. |
| 150 | */ |
| 151 | |
| 152 | pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); |
| 153 | |
| 154 | /* Get a front pixmap. */ |
| 155 | if (!(pDbeWindowPriv->pFrontBuffer = |
| 156 | (*pScreen->CreatePixmap) (pScreen, pDbeWindowPriv->width, |
| 157 | pDbeWindowPriv->height, |
| 158 | pWin->drawable.depth, 0))) { |
| 159 | return BadAlloc; |
| 160 | } |
| 161 | |
| 162 | /* Get a back pixmap. */ |
| 163 | if (!(pDbeWindowPriv->pBackBuffer = |
| 164 | (*pScreen->CreatePixmap) (pScreen, pDbeWindowPriv->width, |
| 165 | pDbeWindowPriv->height, |
| 166 | pWin->drawable.depth, 0))) { |
| 167 | (*pScreen->DestroyPixmap) (pDbeWindowPriv->pFrontBuffer); |
| 168 | return BadAlloc; |
| 169 | } |
| 170 | |
| 171 | /* Security creation/labeling check. */ |
| 172 | rc = XaceHook(XACE_RESOURCE_ACCESS, serverClient, bufId, |
| 173 | dbeDrawableResType, pDbeWindowPriv->pBackBuffer, |
| 174 | RT_WINDOW, pWin, DixCreateAccess); |
| 175 | |
| 176 | /* Make the back pixmap a DBE drawable resource. */ |
| 177 | if (rc != Success || !AddResource(bufId, dbeDrawableResType, |
| 178 | pDbeWindowPriv->pBackBuffer)) { |
| 179 | /* free the buffer and the drawable resource */ |
| 180 | FreeResource(bufId, RT_NONE); |
| 181 | return (rc == Success) ? BadAlloc : rc; |
| 182 | } |
| 183 | |
| 184 | /* Clear the back buffer. */ |
| 185 | pGC = GetScratchGC(pWin->drawable.depth, pWin->drawable.pScreen); |
| 186 | if ((*pDbeScreenPriv->SetupBackgroundPainter) (pWin, pGC)) { |
| 187 | ValidateGC((DrawablePtr) pDbeWindowPriv->pBackBuffer, pGC); |
| 188 | clearRect.x = clearRect.y = 0; |
| 189 | clearRect.width = pDbeWindowPriv->pBackBuffer->drawable.width; |
| 190 | clearRect.height = pDbeWindowPriv->pBackBuffer->drawable.height; |
| 191 | (*pGC->ops->PolyFillRect) ((DrawablePtr) pDbeWindowPriv-> |
| 192 | pBackBuffer, pGC, 1, &clearRect); |
| 193 | } |
| 194 | FreeScratchGC(pGC); |
| 195 | |
| 196 | } /* if no buffer associated with the window */ |
| 197 | |
| 198 | else { |
| 199 | /* A buffer is already associated with the window. |
| 200 | * Place the new buffer ID information at the head of the ID list. |
| 201 | */ |
| 202 | |
| 203 | /* Associate the new ID with an existing pixmap. */ |
| 204 | if (!AddResource(bufId, dbeDrawableResType, |
| 205 | (pointer) pDbeWindowPriv->pBackBuffer)) { |
| 206 | return BadAlloc; |
| 207 | } |
| 208 | |
| 209 | } |
| 210 | |
| 211 | return Success; |
| 212 | |
| 213 | } /* miDbeAllocBackBufferName() */ |
| 214 | \f |
| 215 | /****************************************************************************** |
| 216 | * |
| 217 | * DBE MI Procedure: miDbeAliasBuffers |
| 218 | * |
| 219 | * Description: |
| 220 | * |
| 221 | * This function associates all XIDs of a buffer with the back pixmap |
| 222 | * stored in the window priv. |
| 223 | * |
| 224 | *****************************************************************************/ |
| 225 | |
| 226 | static void |
| 227 | miDbeAliasBuffers(DbeWindowPrivPtr pDbeWindowPriv) |
| 228 | { |
| 229 | int i; |
| 230 | |
| 231 | for (i = 0; i < pDbeWindowPriv->nBufferIDs; i++) { |
| 232 | ChangeResourceValue(pDbeWindowPriv->IDs[i], dbeDrawableResType, |
| 233 | (pointer) pDbeWindowPriv->pBackBuffer); |
| 234 | } |
| 235 | |
| 236 | } /* miDbeAliasBuffers() */ |
| 237 | \f |
| 238 | /****************************************************************************** |
| 239 | * |
| 240 | * DBE MI Procedure: miDbeSwapBuffers |
| 241 | * |
| 242 | * Description: |
| 243 | * |
| 244 | * This is the MI function for the DbeSwapBuffers request. |
| 245 | * |
| 246 | *****************************************************************************/ |
| 247 | |
| 248 | static int |
| 249 | miDbeSwapBuffers(ClientPtr client, int *pNumWindows, DbeSwapInfoPtr swapInfo) |
| 250 | { |
| 251 | DbeScreenPrivPtr pDbeScreenPriv; |
| 252 | DbeWindowPrivPtr pDbeWindowPriv; |
| 253 | GCPtr pGC; |
| 254 | WindowPtr pWin; |
| 255 | PixmapPtr pTmpBuffer; |
| 256 | xRectangle clearRect; |
| 257 | |
| 258 | pWin = swapInfo[0].pWindow; |
| 259 | pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(pWin); |
| 260 | pDbeWindowPriv = DBE_WINDOW_PRIV(pWin); |
| 261 | pGC = GetScratchGC(pWin->drawable.depth, pWin->drawable.pScreen); |
| 262 | |
| 263 | /* |
| 264 | ********************************************************************** |
| 265 | ** Setup before swap. |
| 266 | ********************************************************************** |
| 267 | */ |
| 268 | |
| 269 | switch (swapInfo[0].swapAction) { |
| 270 | case XdbeUndefined: |
| 271 | break; |
| 272 | |
| 273 | case XdbeBackground: |
| 274 | break; |
| 275 | |
| 276 | case XdbeUntouched: |
| 277 | ValidateGC((DrawablePtr) pDbeWindowPriv->pFrontBuffer, pGC); |
| 278 | (*pGC->ops->CopyArea) ((DrawablePtr) pWin, |
| 279 | (DrawablePtr) pDbeWindowPriv->pFrontBuffer, |
| 280 | pGC, 0, 0, pWin->drawable.width, |
| 281 | pWin->drawable.height, 0, 0); |
| 282 | break; |
| 283 | |
| 284 | case XdbeCopied: |
| 285 | break; |
| 286 | |
| 287 | } |
| 288 | |
| 289 | /* |
| 290 | ********************************************************************** |
| 291 | ** Swap. |
| 292 | ********************************************************************** |
| 293 | */ |
| 294 | |
| 295 | ValidateGC((DrawablePtr) pWin, pGC); |
| 296 | (*pGC->ops->CopyArea) ((DrawablePtr) pDbeWindowPriv->pBackBuffer, |
| 297 | (DrawablePtr) pWin, pGC, 0, 0, |
| 298 | pWin->drawable.width, pWin->drawable.height, 0, 0); |
| 299 | |
| 300 | /* |
| 301 | ********************************************************************** |
| 302 | ** Tasks after swap. |
| 303 | ********************************************************************** |
| 304 | */ |
| 305 | |
| 306 | switch (swapInfo[0].swapAction) { |
| 307 | case XdbeUndefined: |
| 308 | break; |
| 309 | |
| 310 | case XdbeBackground: |
| 311 | if ((*pDbeScreenPriv->SetupBackgroundPainter) (pWin, pGC)) { |
| 312 | ValidateGC((DrawablePtr) pDbeWindowPriv->pBackBuffer, pGC); |
| 313 | clearRect.x = 0; |
| 314 | clearRect.y = 0; |
| 315 | clearRect.width = pDbeWindowPriv->pBackBuffer->drawable.width; |
| 316 | clearRect.height = pDbeWindowPriv->pBackBuffer->drawable.height; |
| 317 | (*pGC->ops->PolyFillRect) ((DrawablePtr) pDbeWindowPriv-> |
| 318 | pBackBuffer, pGC, 1, &clearRect); |
| 319 | } |
| 320 | break; |
| 321 | |
| 322 | case XdbeUntouched: |
| 323 | /* Swap pixmap pointers. */ |
| 324 | pTmpBuffer = pDbeWindowPriv->pBackBuffer; |
| 325 | pDbeWindowPriv->pBackBuffer = pDbeWindowPriv->pFrontBuffer; |
| 326 | pDbeWindowPriv->pFrontBuffer = pTmpBuffer; |
| 327 | |
| 328 | miDbeAliasBuffers(pDbeWindowPriv); |
| 329 | |
| 330 | break; |
| 331 | |
| 332 | case XdbeCopied: |
| 333 | break; |
| 334 | |
| 335 | } |
| 336 | |
| 337 | /* Remove the swapped window from the swap information array and decrement |
| 338 | * pNumWindows to indicate to the DIX level how many windows were actually |
| 339 | * swapped. |
| 340 | */ |
| 341 | |
| 342 | if (*pNumWindows > 1) { |
| 343 | /* We were told to swap more than one window, but we only swapped the |
| 344 | * first one. Remove the first window in the list by moving the last |
| 345 | * window to the beginning. |
| 346 | */ |
| 347 | swapInfo[0].pWindow = swapInfo[*pNumWindows - 1].pWindow; |
| 348 | swapInfo[0].swapAction = swapInfo[*pNumWindows - 1].swapAction; |
| 349 | |
| 350 | /* Clear the last window information just to be safe. */ |
| 351 | swapInfo[*pNumWindows - 1].pWindow = (WindowPtr) NULL; |
| 352 | swapInfo[*pNumWindows - 1].swapAction = 0; |
| 353 | } |
| 354 | else { |
| 355 | /* Clear the window information just to be safe. */ |
| 356 | swapInfo[0].pWindow = (WindowPtr) NULL; |
| 357 | swapInfo[0].swapAction = 0; |
| 358 | } |
| 359 | |
| 360 | (*pNumWindows)--; |
| 361 | |
| 362 | FreeScratchGC(pGC); |
| 363 | |
| 364 | return Success; |
| 365 | |
| 366 | } /* miSwapBuffers() */ |
| 367 | \f |
| 368 | /****************************************************************************** |
| 369 | * |
| 370 | * DBE MI Procedure: miDbeWinPrivDelete |
| 371 | * |
| 372 | * Description: |
| 373 | * |
| 374 | * This is the MI function for deleting the dbeWindowPrivResType resource. |
| 375 | * This function is invoked indirectly by calling FreeResource() to free |
| 376 | * the resources associated with a DBE buffer ID. There are 5 ways that |
| 377 | * miDbeWinPrivDelete() can be called by FreeResource(). They are: |
| 378 | * |
| 379 | * - A DBE window is destroyed, in which case the DbeDestroyWindow() |
| 380 | * wrapper is invoked. The wrapper calls FreeResource() for all DBE |
| 381 | * buffer IDs. |
| 382 | * |
| 383 | * - miDbeAllocBackBufferName() calls FreeResource() to clean up resources |
| 384 | * after a buffer allocation failure. |
| 385 | * |
| 386 | * - The PositionWindow wrapper, miDbePositionWindow(), calls |
| 387 | * FreeResource() when it fails to create buffers of the new size. |
| 388 | * FreeResource() is called for all DBE buffer IDs. |
| 389 | * |
| 390 | * - FreeClientResources() calls FreeResource() when a client dies or the |
| 391 | * the server resets. |
| 392 | * |
| 393 | * When FreeResource() is called for a DBE buffer ID, the delete function |
| 394 | * for the only other type of DBE resource, dbeDrawableResType, is also |
| 395 | * invoked. This delete function (DbeDrawableDelete) is a NOOP to make |
| 396 | * resource deletion easier. It is not guaranteed which delete function is |
| 397 | * called first. Hence, we will let miDbeWinPrivDelete() free all DBE |
| 398 | * resources. |
| 399 | * |
| 400 | * This function deletes/frees the following stuff associated with |
| 401 | * the window private: |
| 402 | * |
| 403 | * - the ID node in the ID list representing the passed in ID. |
| 404 | * |
| 405 | * In addition, pDbeWindowPriv->nBufferIDs is decremented. |
| 406 | * |
| 407 | * If this function is called for the last/only buffer ID for a window, |
| 408 | * these are additionally deleted/freed: |
| 409 | * |
| 410 | * - the front and back pixmaps |
| 411 | * - the window priv itself |
| 412 | * |
| 413 | *****************************************************************************/ |
| 414 | |
| 415 | static void |
| 416 | miDbeWinPrivDelete(DbeWindowPrivPtr pDbeWindowPriv, XID bufId) |
| 417 | { |
| 418 | if (pDbeWindowPriv->nBufferIDs != 0) { |
| 419 | /* We still have at least one more buffer ID associated with this |
| 420 | * window. |
| 421 | */ |
| 422 | return; |
| 423 | } |
| 424 | |
| 425 | /* We have no more buffer IDs associated with this window. We need to |
| 426 | * free some stuff. |
| 427 | */ |
| 428 | |
| 429 | /* Destroy the front and back pixmaps. */ |
| 430 | if (pDbeWindowPriv->pFrontBuffer) { |
| 431 | (*pDbeWindowPriv->pWindow->drawable.pScreen-> |
| 432 | DestroyPixmap) (pDbeWindowPriv->pFrontBuffer); |
| 433 | } |
| 434 | if (pDbeWindowPriv->pBackBuffer) { |
| 435 | (*pDbeWindowPriv->pWindow->drawable.pScreen-> |
| 436 | DestroyPixmap) (pDbeWindowPriv->pBackBuffer); |
| 437 | } |
| 438 | } /* miDbeWinPrivDelete() */ |
| 439 | \f |
| 440 | /****************************************************************************** |
| 441 | * |
| 442 | * DBE MI Procedure: miDbePositionWindow |
| 443 | * |
| 444 | * Description: |
| 445 | * |
| 446 | * This function was cloned from miMbxPositionWindow() in mimultibuf.c. |
| 447 | * This function resizes the buffer when the window is resized. |
| 448 | * |
| 449 | *****************************************************************************/ |
| 450 | |
| 451 | static Bool |
| 452 | miDbePositionWindow(WindowPtr pWin, int x, int y) |
| 453 | { |
| 454 | ScreenPtr pScreen; |
| 455 | DbeScreenPrivPtr pDbeScreenPriv; |
| 456 | DbeWindowPrivPtr pDbeWindowPriv; |
| 457 | int width, height; |
| 458 | int dx, dy, dw, dh; |
| 459 | int sourcex, sourcey; |
| 460 | int destx, desty; |
| 461 | int savewidth, saveheight; |
| 462 | PixmapPtr pFrontBuffer; |
| 463 | PixmapPtr pBackBuffer; |
| 464 | Bool clear; |
| 465 | GCPtr pGC; |
| 466 | xRectangle clearRect; |
| 467 | Bool ret; |
| 468 | |
| 469 | /* |
| 470 | ************************************************************************** |
| 471 | ** 1. Unwrap the member routine. |
| 472 | ************************************************************************** |
| 473 | */ |
| 474 | |
| 475 | pScreen = pWin->drawable.pScreen; |
| 476 | pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen); |
| 477 | pScreen->PositionWindow = pDbeScreenPriv->PositionWindow; |
| 478 | |
| 479 | /* |
| 480 | ************************************************************************** |
| 481 | ** 2. Do any work necessary before the member routine is called. |
| 482 | ** |
| 483 | ** In this case we do not need to do anything. |
| 484 | ************************************************************************** |
| 485 | */ |
| 486 | |
| 487 | /* |
| 488 | ************************************************************************** |
| 489 | ** 3. Call the member routine, saving its result if necessary. |
| 490 | ************************************************************************** |
| 491 | */ |
| 492 | |
| 493 | ret = (*pScreen->PositionWindow) (pWin, x, y); |
| 494 | |
| 495 | /* |
| 496 | ************************************************************************** |
| 497 | ** 4. Rewrap the member routine, restoring the wrapper value first in case |
| 498 | ** the wrapper (or something that it wrapped) change this value. |
| 499 | ************************************************************************** |
| 500 | */ |
| 501 | |
| 502 | pDbeScreenPriv->PositionWindow = pScreen->PositionWindow; |
| 503 | pScreen->PositionWindow = miDbePositionWindow; |
| 504 | |
| 505 | /* |
| 506 | ************************************************************************** |
| 507 | ** 5. Do any work necessary after the member routine has been called. |
| 508 | ************************************************************************** |
| 509 | */ |
| 510 | |
| 511 | if (!(pDbeWindowPriv = DBE_WINDOW_PRIV(pWin))) { |
| 512 | return ret; |
| 513 | } |
| 514 | |
| 515 | if (pDbeWindowPriv->width == pWin->drawable.width && |
| 516 | pDbeWindowPriv->height == pWin->drawable.height) { |
| 517 | return ret; |
| 518 | } |
| 519 | |
| 520 | width = pWin->drawable.width; |
| 521 | height = pWin->drawable.height; |
| 522 | |
| 523 | dx = pWin->drawable.x - pDbeWindowPriv->x; |
| 524 | dy = pWin->drawable.y - pDbeWindowPriv->y; |
| 525 | dw = width - pDbeWindowPriv->width; |
| 526 | dh = height - pDbeWindowPriv->height; |
| 527 | |
| 528 | GravityTranslate(0, 0, -dx, -dy, dw, dh, pWin->bitGravity, &destx, &desty); |
| 529 | |
| 530 | clear = ((pDbeWindowPriv->width < (unsigned short) width) || |
| 531 | (pDbeWindowPriv->height < (unsigned short) height) || |
| 532 | (pWin->bitGravity == ForgetGravity)); |
| 533 | |
| 534 | sourcex = 0; |
| 535 | sourcey = 0; |
| 536 | savewidth = pDbeWindowPriv->width; |
| 537 | saveheight = pDbeWindowPriv->height; |
| 538 | |
| 539 | /* Clip rectangle to source and destination. */ |
| 540 | if (destx < 0) { |
| 541 | savewidth += destx; |
| 542 | sourcex -= destx; |
| 543 | destx = 0; |
| 544 | } |
| 545 | |
| 546 | if (destx + savewidth > width) { |
| 547 | savewidth = width - destx; |
| 548 | } |
| 549 | |
| 550 | if (desty < 0) { |
| 551 | saveheight += desty; |
| 552 | sourcey -= desty; |
| 553 | desty = 0; |
| 554 | } |
| 555 | |
| 556 | if (desty + saveheight > height) { |
| 557 | saveheight = height - desty; |
| 558 | } |
| 559 | |
| 560 | pDbeWindowPriv->width = width; |
| 561 | pDbeWindowPriv->height = height; |
| 562 | pDbeWindowPriv->x = pWin->drawable.x; |
| 563 | pDbeWindowPriv->y = pWin->drawable.y; |
| 564 | |
| 565 | pGC = GetScratchGC(pWin->drawable.depth, pScreen); |
| 566 | |
| 567 | if (clear) { |
| 568 | if ((*pDbeScreenPriv->SetupBackgroundPainter) (pWin, pGC)) { |
| 569 | clearRect.x = 0; |
| 570 | clearRect.y = 0; |
| 571 | clearRect.width = width; |
| 572 | clearRect.height = height; |
| 573 | } |
| 574 | else { |
| 575 | clear = FALSE; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | /* Create DBE buffer pixmaps equal to size of resized window. */ |
| 580 | pFrontBuffer = (*pScreen->CreatePixmap) (pScreen, width, height, |
| 581 | pWin->drawable.depth, 0); |
| 582 | |
| 583 | pBackBuffer = (*pScreen->CreatePixmap) (pScreen, width, height, |
| 584 | pWin->drawable.depth, 0); |
| 585 | |
| 586 | if (!pFrontBuffer || !pBackBuffer) { |
| 587 | /* We failed at creating 1 or 2 of the pixmaps. */ |
| 588 | |
| 589 | if (pFrontBuffer) { |
| 590 | (*pScreen->DestroyPixmap) (pFrontBuffer); |
| 591 | } |
| 592 | |
| 593 | if (pBackBuffer) { |
| 594 | (*pScreen->DestroyPixmap) (pBackBuffer); |
| 595 | } |
| 596 | |
| 597 | /* Destroy all buffers for this window. */ |
| 598 | while (pDbeWindowPriv) { |
| 599 | /* DbeWindowPrivDelete() will free the window private if there no |
| 600 | * more buffer IDs associated with this window. |
| 601 | */ |
| 602 | FreeResource(pDbeWindowPriv->IDs[0], RT_NONE); |
| 603 | pDbeWindowPriv = DBE_WINDOW_PRIV(pWin); |
| 604 | } |
| 605 | |
| 606 | FreeScratchGC(pGC); |
| 607 | return FALSE; |
| 608 | } |
| 609 | |
| 610 | else { |
| 611 | /* Clear out the new DBE buffer pixmaps. */ |
| 612 | |
| 613 | /* I suppose this could avoid quite a bit of work if |
| 614 | * it computed the minimal area required. |
| 615 | */ |
| 616 | ValidateGC(&pFrontBuffer->drawable, pGC); |
| 617 | if (clear) { |
| 618 | (*pGC->ops->PolyFillRect) ((DrawablePtr) pFrontBuffer, pGC, 1, |
| 619 | &clearRect); |
| 620 | } |
| 621 | /* Copy the contents of the old front pixmap to the new one. */ |
| 622 | if (pWin->bitGravity != ForgetGravity) { |
| 623 | (*pGC->ops->CopyArea) ((DrawablePtr) pDbeWindowPriv->pFrontBuffer, |
| 624 | (DrawablePtr) pFrontBuffer, pGC, |
| 625 | sourcex, sourcey, savewidth, saveheight, |
| 626 | destx, desty); |
| 627 | } |
| 628 | |
| 629 | ValidateGC(&pBackBuffer->drawable, pGC); |
| 630 | if (clear) { |
| 631 | (*pGC->ops->PolyFillRect) ((DrawablePtr) pBackBuffer, pGC, 1, |
| 632 | &clearRect); |
| 633 | } |
| 634 | /* Copy the contents of the old back pixmap to the new one. */ |
| 635 | if (pWin->bitGravity != ForgetGravity) { |
| 636 | (*pGC->ops->CopyArea) ((DrawablePtr) pDbeWindowPriv->pBackBuffer, |
| 637 | (DrawablePtr) pBackBuffer, pGC, |
| 638 | sourcex, sourcey, savewidth, saveheight, |
| 639 | destx, desty); |
| 640 | } |
| 641 | |
| 642 | /* Destroy the old pixmaps, and point the DBE window priv to the new |
| 643 | * pixmaps. |
| 644 | */ |
| 645 | |
| 646 | (*pScreen->DestroyPixmap) (pDbeWindowPriv->pFrontBuffer); |
| 647 | (*pScreen->DestroyPixmap) (pDbeWindowPriv->pBackBuffer); |
| 648 | |
| 649 | pDbeWindowPriv->pFrontBuffer = pFrontBuffer; |
| 650 | pDbeWindowPriv->pBackBuffer = pBackBuffer; |
| 651 | |
| 652 | /* Make sure all XID are associated with the new back pixmap. */ |
| 653 | miDbeAliasBuffers(pDbeWindowPriv); |
| 654 | |
| 655 | FreeScratchGC(pGC); |
| 656 | } |
| 657 | |
| 658 | return ret; |
| 659 | |
| 660 | } /* miDbePositionWindow() */ |
| 661 | \f |
| 662 | /****************************************************************************** |
| 663 | * |
| 664 | * DBE MI Procedure: miDbeInit |
| 665 | * |
| 666 | * Description: |
| 667 | * |
| 668 | * This is the MI initialization function called by DbeExtensionInit(). |
| 669 | * |
| 670 | *****************************************************************************/ |
| 671 | |
| 672 | Bool |
| 673 | miDbeInit(ScreenPtr pScreen, DbeScreenPrivPtr pDbeScreenPriv) |
| 674 | { |
| 675 | /* Wrap functions. */ |
| 676 | pDbeScreenPriv->PositionWindow = pScreen->PositionWindow; |
| 677 | pScreen->PositionWindow = miDbePositionWindow; |
| 678 | |
| 679 | /* Initialize the per-screen DBE function pointers. */ |
| 680 | pDbeScreenPriv->GetVisualInfo = miDbeGetVisualInfo; |
| 681 | pDbeScreenPriv->AllocBackBufferName = miDbeAllocBackBufferName; |
| 682 | pDbeScreenPriv->SwapBuffers = miDbeSwapBuffers; |
| 683 | pDbeScreenPriv->WinPrivDelete = miDbeWinPrivDelete; |
| 684 | |
| 685 | return TRUE; |
| 686 | |
| 687 | } /* miDbeInit() */ |