| 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 |
| 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 |
| 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 = realloc(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, (pointer) 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 |
| 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 |
| 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 |
| 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 * |
| 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 = malloc((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 |
| 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 |
| 253 | RRModeDestroyResource(pointer value, XID pid) |
| 254 | { |
| 255 | RRModeDestroy((RRModePtr) value); |
| 256 | return 1; |
| 257 | } |
| 258 | |
| 259 | /* |
| 260 | * Initialize mode type |
| 261 | */ |
| 262 | Bool |
| 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 |
| 278 | RRModeInitErrorValue(void) |
| 279 | { |
| 280 | SetResourceTypeErrorValue(RRModeType, RRErrorBase + BadRRMode); |
| 281 | } |
| 282 | |
| 283 | int |
| 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 |
| 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 |
| 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 | return RROutputAddUserMode(output, mode); |
| 361 | } |
| 362 | |
| 363 | int |
| 364 | ProcRRDeleteOutputMode(ClientPtr client) |
| 365 | { |
| 366 | REQUEST(xRRDeleteOutputModeReq); |
| 367 | RRModePtr mode; |
| 368 | RROutputPtr output; |
| 369 | |
| 370 | REQUEST_SIZE_MATCH(xRRDeleteOutputModeReq); |
| 371 | VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess); |
| 372 | VERIFY_RR_MODE(stuff->mode, mode, DixUseAccess); |
| 373 | |
| 374 | return RROutputDeleteUserMode(output, mode); |
| 375 | } |