| 1 | /* |
| 2 | * Minimal implementation of PanoramiX/Xinerama |
| 3 | * |
| 4 | * This is used in rootless mode where the underlying window server |
| 5 | * already provides an abstracted view of multiple screens as one |
| 6 | * large screen area. |
| 7 | * |
| 8 | * This code is largely based on panoramiX.c, which contains the |
| 9 | * following copyright notice: |
| 10 | */ |
| 11 | /***************************************************************** |
| 12 | Copyright (c) 1991, 1997 Digital Equipment Corporation, Maynard, Massachusetts. |
| 13 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| 14 | of this software and associated documentation files (the "Software"), to deal |
| 15 | in the Software without restriction, including without limitation the rights |
| 16 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 17 | copies of the Software. |
| 18 | |
| 19 | The above copyright notice and this permission notice shall be included in |
| 20 | all copies or substantial portions of the Software. |
| 21 | |
| 22 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 23 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 24 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 25 | DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING, |
| 26 | BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR OTHER LIABILITY, |
| 27 | WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR |
| 28 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 29 | |
| 30 | Except as contained in this notice, the name of Digital Equipment Corporation |
| 31 | shall not be used in advertising or otherwise to promote the sale, use or other |
| 32 | dealings in this Software without prior written authorization from Digital |
| 33 | Equipment Corporation. |
| 34 | ******************************************************************/ |
| 35 | |
| 36 | #ifdef HAVE_DIX_CONFIG_H |
| 37 | #include <dix-config.h> |
| 38 | #endif |
| 39 | |
| 40 | #include "pseudoramiX.h" |
| 41 | #include "extnsionst.h" |
| 42 | #include "extinit.h" |
| 43 | #include "dixstruct.h" |
| 44 | #include "window.h" |
| 45 | #include <X11/extensions/panoramiXproto.h> |
| 46 | #include "globals.h" |
| 47 | |
| 48 | #define TRACE PseudoramiXTrace("TRACE " __FILE__ ":%s",__FUNCTION__) |
| 49 | #define DEBUG_LOG PseudoramiXDebug |
| 50 | |
| 51 | Bool noPseudoramiXExtension = FALSE; |
| 52 | |
| 53 | extern int |
| 54 | ProcPanoramiXQueryVersion(ClientPtr client); |
| 55 | |
| 56 | static void |
| 57 | PseudoramiXResetProc(ExtensionEntry *extEntry); |
| 58 | |
| 59 | static int |
| 60 | ProcPseudoramiXQueryVersion(ClientPtr client); |
| 61 | static int |
| 62 | ProcPseudoramiXGetState(ClientPtr client); |
| 63 | static int |
| 64 | ProcPseudoramiXGetScreenCount(ClientPtr client); |
| 65 | static int |
| 66 | ProcPseudoramiXGetScreenSize(ClientPtr client); |
| 67 | static int |
| 68 | ProcPseudoramiXIsActive(ClientPtr client); |
| 69 | static int |
| 70 | ProcPseudoramiXQueryScreens(ClientPtr client); |
| 71 | static int |
| 72 | ProcPseudoramiXDispatch(ClientPtr client); |
| 73 | |
| 74 | static int |
| 75 | SProcPseudoramiXQueryVersion(ClientPtr client); |
| 76 | static int |
| 77 | SProcPseudoramiXGetState(ClientPtr client); |
| 78 | static int |
| 79 | SProcPseudoramiXGetScreenCount(ClientPtr client); |
| 80 | static int |
| 81 | SProcPseudoramiXGetScreenSize(ClientPtr client); |
| 82 | static int |
| 83 | SProcPseudoramiXIsActive(ClientPtr client); |
| 84 | static int |
| 85 | SProcPseudoramiXQueryScreens(ClientPtr client); |
| 86 | static int |
| 87 | SProcPseudoramiXDispatch(ClientPtr client); |
| 88 | |
| 89 | typedef struct { |
| 90 | int x; |
| 91 | int y; |
| 92 | int w; |
| 93 | int h; |
| 94 | } PseudoramiXScreenRec; |
| 95 | |
| 96 | static PseudoramiXScreenRec *pseudoramiXScreens = NULL; |
| 97 | static int pseudoramiXScreensAllocated = 0; |
| 98 | static int pseudoramiXNumScreens = 0; |
| 99 | static unsigned long pseudoramiXGeneration = 0; |
| 100 | |
| 101 | static void |
| 102 | PseudoramiXTrace(const char *format, ...) |
| 103 | { |
| 104 | va_list ap; |
| 105 | |
| 106 | va_start(ap, format); |
| 107 | LogVMessageVerb(X_NONE, 10, format, ap); |
| 108 | va_end(ap); |
| 109 | } |
| 110 | |
| 111 | static void |
| 112 | PseudoramiXDebug(const char *format, ...) |
| 113 | { |
| 114 | va_list ap; |
| 115 | |
| 116 | va_start(ap, format); |
| 117 | LogVMessageVerb(X_NONE, 3, format, ap); |
| 118 | va_end(ap); |
| 119 | } |
| 120 | |
| 121 | // Add a PseudoramiX screen. |
| 122 | // The rest of the X server will know nothing about this screen. |
| 123 | // Can be called before or after extension init. |
| 124 | // Screens must be re-added once per generation. |
| 125 | void |
| 126 | PseudoramiXAddScreen(int x, int y, int w, int h) |
| 127 | { |
| 128 | PseudoramiXScreenRec *s; |
| 129 | |
| 130 | if (noPseudoramiXExtension) return; |
| 131 | |
| 132 | if (pseudoramiXNumScreens == pseudoramiXScreensAllocated) { |
| 133 | pseudoramiXScreensAllocated += pseudoramiXScreensAllocated + 1; |
| 134 | pseudoramiXScreens = realloc(pseudoramiXScreens, |
| 135 | pseudoramiXScreensAllocated * |
| 136 | sizeof(PseudoramiXScreenRec)); |
| 137 | } |
| 138 | |
| 139 | DEBUG_LOG("x: %d, y: %d, w: %d, h: %d\n", x, y, w, h); |
| 140 | |
| 141 | s = &pseudoramiXScreens[pseudoramiXNumScreens++]; |
| 142 | s->x = x; |
| 143 | s->y = y; |
| 144 | s->w = w; |
| 145 | s->h = h; |
| 146 | } |
| 147 | |
| 148 | // Initialize PseudoramiX. |
| 149 | // Copied from PanoramiXExtensionInit |
| 150 | void |
| 151 | PseudoramiXExtensionInit(void) |
| 152 | { |
| 153 | Bool success = FALSE; |
| 154 | ExtensionEntry *extEntry; |
| 155 | |
| 156 | if (noPseudoramiXExtension) return; |
| 157 | |
| 158 | TRACE; |
| 159 | |
| 160 | /* Even with only one screen we need to enable PseudoramiX to allow |
| 161 | dynamic screen configuration changes. */ |
| 162 | #if 0 |
| 163 | if (pseudoramiXNumScreens == 1) { |
| 164 | // Only one screen - disable Xinerama extension. |
| 165 | noPseudoramiXExtension = TRUE; |
| 166 | return; |
| 167 | } |
| 168 | #endif |
| 169 | |
| 170 | if (pseudoramiXGeneration != serverGeneration) { |
| 171 | extEntry = AddExtension(PANORAMIX_PROTOCOL_NAME, 0, 0, |
| 172 | ProcPseudoramiXDispatch, |
| 173 | SProcPseudoramiXDispatch, |
| 174 | PseudoramiXResetProc, |
| 175 | StandardMinorOpcode); |
| 176 | if (!extEntry) { |
| 177 | ErrorF("PseudoramiXExtensionInit(): AddExtension failed\n"); |
| 178 | } |
| 179 | else { |
| 180 | pseudoramiXGeneration = serverGeneration; |
| 181 | success = TRUE; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | if (!success) { |
| 186 | ErrorF("%s Extension (PseudoramiX) failed to initialize\n", |
| 187 | PANORAMIX_PROTOCOL_NAME); |
| 188 | return; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | void |
| 193 | PseudoramiXResetScreens(void) |
| 194 | { |
| 195 | TRACE; |
| 196 | |
| 197 | pseudoramiXNumScreens = 0; |
| 198 | } |
| 199 | |
| 200 | static void |
| 201 | PseudoramiXResetProc(ExtensionEntry *extEntry) |
| 202 | { |
| 203 | TRACE; |
| 204 | |
| 205 | PseudoramiXResetScreens(); |
| 206 | } |
| 207 | |
| 208 | // was PanoramiX |
| 209 | static int |
| 210 | ProcPseudoramiXQueryVersion(ClientPtr client) |
| 211 | { |
| 212 | TRACE; |
| 213 | |
| 214 | return ProcPanoramiXQueryVersion(client); |
| 215 | } |
| 216 | |
| 217 | // was PanoramiX |
| 218 | static int |
| 219 | ProcPseudoramiXGetState(ClientPtr client) |
| 220 | { |
| 221 | REQUEST(xPanoramiXGetStateReq); |
| 222 | WindowPtr pWin; |
| 223 | xPanoramiXGetStateReply rep; |
| 224 | register int rc; |
| 225 | |
| 226 | TRACE; |
| 227 | |
| 228 | REQUEST_SIZE_MATCH(xPanoramiXGetStateReq); |
| 229 | rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess); |
| 230 | if (rc != Success) |
| 231 | return rc; |
| 232 | |
| 233 | rep.type = X_Reply; |
| 234 | rep.length = 0; |
| 235 | rep.sequenceNumber = client->sequence; |
| 236 | rep.state = !noPseudoramiXExtension; |
| 237 | rep.window = stuff->window; |
| 238 | if (client->swapped) { |
| 239 | swaps(&rep.sequenceNumber); |
| 240 | swapl(&rep.length); |
| 241 | swapl(&rep.window); |
| 242 | } |
| 243 | WriteToClient(client, sizeof(xPanoramiXGetStateReply),&rep); |
| 244 | return Success; |
| 245 | } |
| 246 | |
| 247 | // was PanoramiX |
| 248 | static int |
| 249 | ProcPseudoramiXGetScreenCount(ClientPtr client) |
| 250 | { |
| 251 | REQUEST(xPanoramiXGetScreenCountReq); |
| 252 | WindowPtr pWin; |
| 253 | xPanoramiXGetScreenCountReply rep; |
| 254 | register int rc; |
| 255 | |
| 256 | TRACE; |
| 257 | |
| 258 | REQUEST_SIZE_MATCH(xPanoramiXGetScreenCountReq); |
| 259 | rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess); |
| 260 | if (rc != Success) |
| 261 | return rc; |
| 262 | |
| 263 | rep.type = X_Reply; |
| 264 | rep.length = 0; |
| 265 | rep.sequenceNumber = client->sequence; |
| 266 | rep.ScreenCount = pseudoramiXNumScreens; |
| 267 | rep.window = stuff->window; |
| 268 | if (client->swapped) { |
| 269 | swaps(&rep.sequenceNumber); |
| 270 | swapl(&rep.length); |
| 271 | swapl(&rep.window); |
| 272 | } |
| 273 | WriteToClient(client, sizeof(xPanoramiXGetScreenCountReply),&rep); |
| 274 | return Success; |
| 275 | } |
| 276 | |
| 277 | // was PanoramiX |
| 278 | static int |
| 279 | ProcPseudoramiXGetScreenSize(ClientPtr client) |
| 280 | { |
| 281 | REQUEST(xPanoramiXGetScreenSizeReq); |
| 282 | WindowPtr pWin; |
| 283 | xPanoramiXGetScreenSizeReply rep; |
| 284 | register int rc; |
| 285 | |
| 286 | TRACE; |
| 287 | |
| 288 | if (stuff->screen >= pseudoramiXNumScreens) |
| 289 | return BadMatch; |
| 290 | |
| 291 | REQUEST_SIZE_MATCH(xPanoramiXGetScreenSizeReq); |
| 292 | rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess); |
| 293 | if (rc != Success) |
| 294 | return rc; |
| 295 | |
| 296 | rep.type = X_Reply; |
| 297 | rep.length = 0; |
| 298 | rep.sequenceNumber = client->sequence; |
| 299 | /* screen dimensions */ |
| 300 | rep.width = pseudoramiXScreens[stuff->screen].w; |
| 301 | // was screenInfo.screens[stuff->screen]->width; |
| 302 | rep.height = pseudoramiXScreens[stuff->screen].h; |
| 303 | // was screenInfo.screens[stuff->screen]->height; |
| 304 | rep.window = stuff->window; |
| 305 | rep.screen = stuff->screen; |
| 306 | if (client->swapped) { |
| 307 | swaps(&rep.sequenceNumber); |
| 308 | swapl(&rep.length); |
| 309 | swapl(&rep.width); |
| 310 | swapl(&rep.height); |
| 311 | swapl(&rep.window); |
| 312 | swapl(&rep.screen); |
| 313 | } |
| 314 | WriteToClient(client, sizeof(xPanoramiXGetScreenSizeReply),&rep); |
| 315 | return Success; |
| 316 | } |
| 317 | |
| 318 | // was Xinerama |
| 319 | static int |
| 320 | ProcPseudoramiXIsActive(ClientPtr client) |
| 321 | { |
| 322 | /* REQUEST(xXineramaIsActiveReq); */ |
| 323 | xXineramaIsActiveReply rep; |
| 324 | |
| 325 | TRACE; |
| 326 | |
| 327 | REQUEST_SIZE_MATCH(xXineramaIsActiveReq); |
| 328 | |
| 329 | rep.type = X_Reply; |
| 330 | rep.length = 0; |
| 331 | rep.sequenceNumber = client->sequence; |
| 332 | rep.state = !noPseudoramiXExtension; |
| 333 | if (client->swapped) { |
| 334 | swaps(&rep.sequenceNumber); |
| 335 | swapl(&rep.length); |
| 336 | swapl(&rep.state); |
| 337 | } |
| 338 | WriteToClient(client, sizeof(xXineramaIsActiveReply),&rep); |
| 339 | return Success; |
| 340 | } |
| 341 | |
| 342 | // was Xinerama |
| 343 | static int |
| 344 | ProcPseudoramiXQueryScreens(ClientPtr client) |
| 345 | { |
| 346 | /* REQUEST(xXineramaQueryScreensReq); */ |
| 347 | xXineramaQueryScreensReply rep; |
| 348 | |
| 349 | DEBUG_LOG("noPseudoramiXExtension=%d, pseudoramiXNumScreens=%d\n", |
| 350 | noPseudoramiXExtension, |
| 351 | pseudoramiXNumScreens); |
| 352 | |
| 353 | REQUEST_SIZE_MATCH(xXineramaQueryScreensReq); |
| 354 | |
| 355 | rep.type = X_Reply; |
| 356 | rep.sequenceNumber = client->sequence; |
| 357 | rep.number = noPseudoramiXExtension ? 0 : pseudoramiXNumScreens; |
| 358 | rep.length = bytes_to_int32(rep.number * sz_XineramaScreenInfo); |
| 359 | if (client->swapped) { |
| 360 | swaps(&rep.sequenceNumber); |
| 361 | swapl(&rep.length); |
| 362 | swapl(&rep.number); |
| 363 | } |
| 364 | WriteToClient(client, sizeof(xXineramaQueryScreensReply),&rep); |
| 365 | |
| 366 | if (!noPseudoramiXExtension) { |
| 367 | xXineramaScreenInfo scratch; |
| 368 | int i; |
| 369 | |
| 370 | for (i = 0; i < pseudoramiXNumScreens; i++) { |
| 371 | scratch.x_org = pseudoramiXScreens[i].x; |
| 372 | scratch.y_org = pseudoramiXScreens[i].y; |
| 373 | scratch.width = pseudoramiXScreens[i].w; |
| 374 | scratch.height = pseudoramiXScreens[i].h; |
| 375 | |
| 376 | if (client->swapped) { |
| 377 | swaps(&scratch.x_org); |
| 378 | swaps(&scratch.y_org); |
| 379 | swaps(&scratch.width); |
| 380 | swaps(&scratch.height); |
| 381 | } |
| 382 | WriteToClient(client, sz_XineramaScreenInfo,&scratch); |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | return Success; |
| 387 | } |
| 388 | |
| 389 | // was PanoramiX |
| 390 | static int |
| 391 | ProcPseudoramiXDispatch(ClientPtr client) |
| 392 | { |
| 393 | REQUEST(xReq); |
| 394 | TRACE; |
| 395 | switch (stuff->data) { |
| 396 | case X_PanoramiXQueryVersion: |
| 397 | return ProcPseudoramiXQueryVersion(client); |
| 398 | |
| 399 | case X_PanoramiXGetState: |
| 400 | return ProcPseudoramiXGetState(client); |
| 401 | |
| 402 | case X_PanoramiXGetScreenCount: |
| 403 | return ProcPseudoramiXGetScreenCount(client); |
| 404 | |
| 405 | case X_PanoramiXGetScreenSize: |
| 406 | return ProcPseudoramiXGetScreenSize(client); |
| 407 | |
| 408 | case X_XineramaIsActive: |
| 409 | return ProcPseudoramiXIsActive(client); |
| 410 | |
| 411 | case X_XineramaQueryScreens: |
| 412 | return ProcPseudoramiXQueryScreens(client); |
| 413 | } |
| 414 | return BadRequest; |
| 415 | } |
| 416 | |
| 417 | static int |
| 418 | SProcPseudoramiXQueryVersion(ClientPtr client) |
| 419 | { |
| 420 | REQUEST(xPanoramiXQueryVersionReq); |
| 421 | |
| 422 | TRACE; |
| 423 | |
| 424 | swaps(&stuff->length); |
| 425 | REQUEST_SIZE_MATCH(xPanoramiXQueryVersionReq); |
| 426 | return ProcPseudoramiXQueryVersion(client); |
| 427 | } |
| 428 | |
| 429 | static int |
| 430 | SProcPseudoramiXGetState(ClientPtr client) |
| 431 | { |
| 432 | REQUEST(xPanoramiXGetStateReq); |
| 433 | |
| 434 | TRACE; |
| 435 | |
| 436 | swaps(&stuff->length); |
| 437 | REQUEST_SIZE_MATCH(xPanoramiXGetStateReq); |
| 438 | return ProcPseudoramiXGetState(client); |
| 439 | } |
| 440 | |
| 441 | static int |
| 442 | SProcPseudoramiXGetScreenCount(ClientPtr client) |
| 443 | { |
| 444 | REQUEST(xPanoramiXGetScreenCountReq); |
| 445 | |
| 446 | TRACE; |
| 447 | |
| 448 | swaps(&stuff->length); |
| 449 | REQUEST_SIZE_MATCH(xPanoramiXGetScreenCountReq); |
| 450 | return ProcPseudoramiXGetScreenCount(client); |
| 451 | } |
| 452 | |
| 453 | static int |
| 454 | SProcPseudoramiXGetScreenSize(ClientPtr client) |
| 455 | { |
| 456 | REQUEST(xPanoramiXGetScreenSizeReq); |
| 457 | |
| 458 | TRACE; |
| 459 | |
| 460 | swaps(&stuff->length); |
| 461 | REQUEST_SIZE_MATCH(xPanoramiXGetScreenSizeReq); |
| 462 | return ProcPseudoramiXGetScreenSize(client); |
| 463 | } |
| 464 | |
| 465 | static int |
| 466 | SProcPseudoramiXIsActive(ClientPtr client) |
| 467 | { |
| 468 | REQUEST(xXineramaIsActiveReq); |
| 469 | |
| 470 | TRACE; |
| 471 | |
| 472 | swaps(&stuff->length); |
| 473 | REQUEST_SIZE_MATCH(xXineramaIsActiveReq); |
| 474 | return ProcPseudoramiXIsActive(client); |
| 475 | } |
| 476 | |
| 477 | static int |
| 478 | SProcPseudoramiXQueryScreens(ClientPtr client) |
| 479 | { |
| 480 | REQUEST(xXineramaQueryScreensReq); |
| 481 | |
| 482 | TRACE; |
| 483 | |
| 484 | swaps(&stuff->length); |
| 485 | REQUEST_SIZE_MATCH(xXineramaQueryScreensReq); |
| 486 | return ProcPseudoramiXQueryScreens(client); |
| 487 | } |
| 488 | |
| 489 | static int |
| 490 | SProcPseudoramiXDispatch(ClientPtr client) |
| 491 | { |
| 492 | REQUEST(xReq); |
| 493 | |
| 494 | TRACE; |
| 495 | |
| 496 | switch (stuff->data) { |
| 497 | case X_PanoramiXQueryVersion: |
| 498 | return SProcPseudoramiXQueryVersion(client); |
| 499 | |
| 500 | case X_PanoramiXGetState: |
| 501 | return SProcPseudoramiXGetState(client); |
| 502 | |
| 503 | case X_PanoramiXGetScreenCount: |
| 504 | return SProcPseudoramiXGetScreenCount(client); |
| 505 | |
| 506 | case X_PanoramiXGetScreenSize: |
| 507 | return SProcPseudoramiXGetScreenSize(client); |
| 508 | |
| 509 | case X_XineramaIsActive: |
| 510 | return SProcPseudoramiXIsActive(client); |
| 511 | |
| 512 | case X_XineramaQueryScreens: |
| 513 | return SProcPseudoramiXQueryScreens(client); |
| 514 | } |
| 515 | return BadRequest; |
| 516 | } |