File: | dbe/midbe.c |
Location: | line 90, column 40 |
Description: | Call to 'malloc' has an allocation size of 0 bytes |
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_H1 | |||
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 | ||||
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 FALSE0; /* 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 TRUE1; /* success */ | |||
119 | ||||
120 | } /* miDbeGetVisualInfo() */ | |||
121 | ||||
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)((DbeWindowPrivPtr) dixLookupPrivate(&(pWin)->devPrivates , (&dbeWindowPrivKeyRec))); | |||
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)((DbeScreenPrivPtr) dixLookupPrivate(&(pScreen)->devPrivates , (&dbeScreenPrivKeyRec))); | |||
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 BadAlloc11; | |||
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 BadAlloc11; | |||
169 | } | |||
170 | ||||
171 | /* Security creation/labeling check. */ | |||
172 | rc = XaceHook(XACE_RESOURCE_ACCESS2, serverClient, bufId, | |||
173 | dbeDrawableResType, pDbeWindowPriv->pBackBuffer, | |||
174 | RT_WINDOW((RESTYPE)1|((RESTYPE)1<<30)), pWin, DixCreateAccess(1<<3)); | |||
175 | ||||
176 | /* Make the back pixmap a DBE drawable resource. */ | |||
177 | if (rc != Success0 || !AddResourceDarwin_X_AddResource(bufId, dbeDrawableResType, | |||
178 | pDbeWindowPriv->pBackBuffer)) { | |||
179 | /* free the buffer and the drawable resource */ | |||
180 | FreeResource(bufId, RT_NONE((RESTYPE)0)); | |||
181 | return (rc == Success0) ? BadAlloc11 : 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 (!AddResourceDarwin_X_AddResource(bufId, dbeDrawableResType, | |||
205 | (void *) pDbeWindowPriv->pBackBuffer)) { | |||
206 | return BadAlloc11; | |||
207 | } | |||
208 | ||||
209 | } | |||
210 | ||||
211 | return Success0; | |||
212 | ||||
213 | } /* miDbeAllocBackBufferName() */ | |||
214 | ||||
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 | (void *) pDbeWindowPriv->pBackBuffer); | |||
234 | } | |||
235 | ||||
236 | } /* miDbeAliasBuffers() */ | |||
237 | ||||
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)((DbeScreenPrivPtr) dixLookupPrivate(&((pWin)->drawable .pScreen)->devPrivates, (&dbeScreenPrivKeyRec))); | |||
260 | pDbeWindowPriv = DBE_WINDOW_PRIV(pWin)((DbeWindowPrivPtr) dixLookupPrivate(&(pWin)->devPrivates , (&dbeWindowPrivKeyRec))); | |||
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 XdbeUndefined0: | |||
271 | break; | |||
272 | ||||
273 | case XdbeBackground1: | |||
274 | break; | |||
275 | ||||
276 | case XdbeUntouched2: | |||
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 XdbeCopied3: | |||
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 XdbeUndefined0: | |||
308 | break; | |||
309 | ||||
310 | case XdbeBackground1: | |||
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 XdbeUntouched2: | |||
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 XdbeCopied3: | |||
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((void*)0); | |||
352 | swapInfo[*pNumWindows - 1].swapAction = 0; | |||
353 | } | |||
354 | else { | |||
355 | /* Clear the window information just to be safe. */ | |||
356 | swapInfo[0].pWindow = (WindowPtr) NULL((void*)0); | |||
357 | swapInfo[0].swapAction = 0; | |||
358 | } | |||
359 | ||||
360 | (*pNumWindows)--; | |||
361 | ||||
362 | FreeScratchGC(pGC); | |||
363 | ||||
364 | return Success0; | |||
365 | ||||
366 | } /* miSwapBuffers() */ | |||
367 | ||||
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 | ||||
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)((DbeScreenPrivPtr) dixLookupPrivate(&(pScreen)->devPrivates , (&dbeScreenPrivKeyRec))); | |||
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)((DbeWindowPrivPtr) dixLookupPrivate(&(pWin)->devPrivates , (&dbeWindowPrivKeyRec))))) { | |||
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 == ForgetGravity0)); | |||
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 = FALSE0; | |||
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((RESTYPE)0)); | |||
603 | pDbeWindowPriv = DBE_WINDOW_PRIV(pWin)((DbeWindowPrivPtr) dixLookupPrivate(&(pWin)->devPrivates , (&dbeWindowPrivKeyRec))); | |||
604 | } | |||
605 | ||||
606 | FreeScratchGC(pGC); | |||
607 | return FALSE0; | |||
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 != ForgetGravity0) { | |||
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 != ForgetGravity0) { | |||
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 | ||||
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 TRUE1; | |||
686 | ||||
687 | } /* miDbeInit() */ |