1 /*
2 * Copyright © 2006 Keith Packard
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23 #include "randrstr.h"
24
25 RESTYPE RRModeType;
26
27 static Bool
RRModeEqual(xRRModeInfo * a,xRRModeInfo * b)28 RRModeEqual(xRRModeInfo * a, xRRModeInfo * b)
29 {
30 if (a->width != b->width)
31 return FALSE;
32 if (a->height != b->height)
33 return FALSE;
34 if (a->dotClock != b->dotClock)
35 return FALSE;
36 if (a->hSyncStart != b->hSyncStart)
37 return FALSE;
38 if (a->hSyncEnd != b->hSyncEnd)
39 return FALSE;
40 if (a->hTotal != b->hTotal)
41 return FALSE;
42 if (a->hSkew != b->hSkew)
43 return FALSE;
44 if (a->vSyncStart != b->vSyncStart)
45 return FALSE;
46 if (a->vSyncEnd != b->vSyncEnd)
47 return FALSE;
48 if (a->vTotal != b->vTotal)
49 return FALSE;
50 if (a->nameLength != b->nameLength)
51 return FALSE;
52 if (a->modeFlags != b->modeFlags)
53 return FALSE;
54 return TRUE;
55 }
56
57 /*
58 * Keep a list so it's easy to find modes in the resource database.
59 */
60 static int num_modes;
61 static RRModePtr *modes;
62
63 static RRModePtr
RRModeCreate(xRRModeInfo * modeInfo,const char * name,ScreenPtr userScreen)64 RRModeCreate(xRRModeInfo * modeInfo, const char *name, ScreenPtr userScreen)
65 {
66 RRModePtr mode, *newModes;
67
68 if (!RRInit())
69 return NULL;
70
71 mode = malloc(sizeof(RRModeRec) + modeInfo->nameLength + 1);
72 if (!mode)
73 return NULL;
74 mode->refcnt = 1;
75 mode->mode = *modeInfo;
76 mode->name = (char *) (mode + 1);
77 memcpy(mode->name, name, modeInfo->nameLength);
78 mode->name[modeInfo->nameLength] = '\0';
79 mode->userScreen = userScreen;
80
81 if (num_modes)
82 newModes = reallocarray(modes, num_modes + 1, sizeof(RRModePtr));
83 else
84 newModes = malloc(sizeof(RRModePtr));
85
86 if (!newModes) {
87 free(mode);
88 return NULL;
89 }
90
91 mode->mode.id = FakeClientID(0);
92 if (!AddResource(mode->mode.id, RRModeType, (void *) mode)) {
93 free(newModes);
94 return NULL;
95 }
96 modes = newModes;
97 modes[num_modes++] = mode;
98
99 /*
100 * give the caller a reference to this mode
101 */
102 ++mode->refcnt;
103 return mode;
104 }
105
106 static RRModePtr
RRModeFindByName(const char * name,CARD16 nameLength)107 RRModeFindByName(const char *name, CARD16 nameLength)
108 {
109 int i;
110 RRModePtr mode;
111
112 for (i = 0; i < num_modes; i++) {
113 mode = modes[i];
114 if (mode->mode.nameLength == nameLength &&
115 !memcmp(name, mode->name, nameLength)) {
116 return mode;
117 }
118 }
119 return NULL;
120 }
121
122 RRModePtr
RRModeGet(xRRModeInfo * modeInfo,const char * name)123 RRModeGet(xRRModeInfo * modeInfo, const char *name)
124 {
125 int i;
126
127 for (i = 0; i < num_modes; i++) {
128 RRModePtr mode = modes[i];
129
130 if (RRModeEqual(&mode->mode, modeInfo) &&
131 !memcmp(name, mode->name, modeInfo->nameLength)) {
132 ++mode->refcnt;
133 return mode;
134 }
135 }
136
137 return RRModeCreate(modeInfo, name, NULL);
138 }
139
140 static RRModePtr
RRModeCreateUser(ScreenPtr pScreen,xRRModeInfo * modeInfo,const char * name,int * error)141 RRModeCreateUser(ScreenPtr pScreen,
142 xRRModeInfo * modeInfo, const char *name, int *error)
143 {
144 RRModePtr mode;
145
146 mode = RRModeFindByName(name, modeInfo->nameLength);
147 if (mode) {
148 *error = BadName;
149 return NULL;
150 }
151
152 mode = RRModeCreate(modeInfo, name, pScreen);
153 if (!mode) {
154 *error = BadAlloc;
155 return NULL;
156 }
157 *error = Success;
158 return mode;
159 }
160
161 RRModePtr *
RRModesForScreen(ScreenPtr pScreen,int * num_ret)162 RRModesForScreen(ScreenPtr pScreen, int *num_ret)
163 {
164 rrScrPriv(pScreen);
165 int o, c, m;
166 RRModePtr *screen_modes;
167 int num_screen_modes = 0;
168
169 screen_modes = xallocarray((num_modes ? num_modes : 1), sizeof(RRModePtr));
170 if (!screen_modes)
171 return NULL;
172
173 /*
174 * Add modes from all outputs
175 */
176 for (o = 0; o < pScrPriv->numOutputs; o++) {
177 RROutputPtr output = pScrPriv->outputs[o];
178 int n;
179
180 for (m = 0; m < output->numModes + output->numUserModes; m++) {
181 RRModePtr mode = (m < output->numModes ?
182 output->modes[m] :
183 output->userModes[m - output->numModes]);
184 for (n = 0; n < num_screen_modes; n++)
185 if (screen_modes[n] == mode)
186 break;
187 if (n == num_screen_modes)
188 screen_modes[num_screen_modes++] = mode;
189 }
190 }
191 /*
192 * Add modes from all crtcs. The goal is to
193 * make sure all available and active modes
194 * are visible to the client
195 */
196 for (c = 0; c < pScrPriv->numCrtcs; c++) {
197 RRCrtcPtr crtc = pScrPriv->crtcs[c];
198 RRModePtr mode = crtc->mode;
199 int n;
200
201 if (!mode)
202 continue;
203 for (n = 0; n < num_screen_modes; n++)
204 if (screen_modes[n] == mode)
205 break;
206 if (n == num_screen_modes)
207 screen_modes[num_screen_modes++] = mode;
208 }
209 /*
210 * Add all user modes for this screen
211 */
212 for (m = 0; m < num_modes; m++) {
213 RRModePtr mode = modes[m];
214 int n;
215
216 if (mode->userScreen != pScreen)
217 continue;
218 for (n = 0; n < num_screen_modes; n++)
219 if (screen_modes[n] == mode)
220 break;
221 if (n == num_screen_modes)
222 screen_modes[num_screen_modes++] = mode;
223 }
224
225 *num_ret = num_screen_modes;
226 return screen_modes;
227 }
228
229 void
RRModeDestroy(RRModePtr mode)230 RRModeDestroy(RRModePtr mode)
231 {
232 int m;
233
234 if (--mode->refcnt > 0)
235 return;
236 for (m = 0; m < num_modes; m++) {
237 if (modes[m] == mode) {
238 memmove(modes + m, modes + m + 1,
239 (num_modes - m - 1) * sizeof(RRModePtr));
240 num_modes--;
241 if (!num_modes) {
242 free(modes);
243 modes = NULL;
244 }
245 break;
246 }
247 }
248
249 free(mode);
250 }
251
252 static int
RRModeDestroyResource(void * value,XID pid)253 RRModeDestroyResource(void *value, XID pid)
254 {
255 RRModeDestroy((RRModePtr) value);
256 return 1;
257 }
258
259 /*
260 * Initialize mode type
261 */
262 Bool
RRModeInit(void)263 RRModeInit(void)
264 {
265 assert(num_modes == 0);
266 assert(modes == NULL);
267 RRModeType = CreateNewResourceType(RRModeDestroyResource, "MODE");
268 if (!RRModeType)
269 return FALSE;
270
271 return TRUE;
272 }
273
274 /*
275 * Initialize mode type error value
276 */
277 void
RRModeInitErrorValue(void)278 RRModeInitErrorValue(void)
279 {
280 SetResourceTypeErrorValue(RRModeType, RRErrorBase + BadRRMode);
281 }
282
283 int
ProcRRCreateMode(ClientPtr client)284 ProcRRCreateMode(ClientPtr client)
285 {
286 REQUEST(xRRCreateModeReq);
287 xRRCreateModeReply rep;
288 WindowPtr pWin;
289 ScreenPtr pScreen;
290 xRRModeInfo *modeInfo;
291 long units_after;
292 char *name;
293 int error, rc;
294 RRModePtr mode;
295
296 REQUEST_AT_LEAST_SIZE(xRRCreateModeReq);
297 rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
298 if (rc != Success)
299 return rc;
300
301 pScreen = pWin->drawable.pScreen;
302
303 modeInfo = &stuff->modeInfo;
304 name = (char *) (stuff + 1);
305 units_after = (stuff->length - bytes_to_int32(sizeof(xRRCreateModeReq)));
306
307 /* check to make sure requested name fits within the data provided */
308 if (bytes_to_int32(modeInfo->nameLength) > units_after)
309 return BadLength;
310
311 mode = RRModeCreateUser(pScreen, modeInfo, name, &error);
312 if (!mode)
313 return error;
314
315 rep = (xRRCreateModeReply) {
316 .type = X_Reply,
317 .sequenceNumber = client->sequence,
318 .length = 0,
319 .mode = mode->mode.id
320 };
321 if (client->swapped) {
322 swaps(&rep.sequenceNumber);
323 swapl(&rep.length);
324 swapl(&rep.mode);
325 }
326 WriteToClient(client, sizeof(xRRCreateModeReply), &rep);
327 /* Drop out reference to this mode */
328 RRModeDestroy(mode);
329 return Success;
330 }
331
332 int
ProcRRDestroyMode(ClientPtr client)333 ProcRRDestroyMode(ClientPtr client)
334 {
335 REQUEST(xRRDestroyModeReq);
336 RRModePtr mode;
337
338 REQUEST_SIZE_MATCH(xRRDestroyModeReq);
339 VERIFY_RR_MODE(stuff->mode, mode, DixDestroyAccess);
340
341 if (!mode->userScreen)
342 return BadMatch;
343 if (mode->refcnt > 1)
344 return BadAccess;
345 FreeResource(stuff->mode, 0);
346 return Success;
347 }
348
349 int
ProcRRAddOutputMode(ClientPtr client)350 ProcRRAddOutputMode(ClientPtr client)
351 {
352 REQUEST(xRRAddOutputModeReq);
353 RRModePtr mode;
354 RROutputPtr output;
355
356 REQUEST_SIZE_MATCH(xRRAddOutputModeReq);
357 VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);
358 VERIFY_RR_MODE(stuff->mode, mode, DixUseAccess);
359
360 if (RROutputIsLeased(output))
361 return BadAccess;
362
363 return RROutputAddUserMode(output, mode);
364 }
365
366 int
ProcRRDeleteOutputMode(ClientPtr client)367 ProcRRDeleteOutputMode(ClientPtr client)
368 {
369 REQUEST(xRRDeleteOutputModeReq);
370 RRModePtr mode;
371 RROutputPtr output;
372
373 REQUEST_SIZE_MATCH(xRRDeleteOutputModeReq);
374 VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);
375 VERIFY_RR_MODE(stuff->mode, mode, DixUseAccess);
376
377 if (RROutputIsLeased(output))
378 return BadAccess;
379
380 return RROutputDeleteUserMode(output, mode);
381 }
382