| 1 | /*********************************************************** |
| 2 | |
| 3 | Copyright 1987, 1998 The Open Group |
| 4 | |
| 5 | Permission to use, copy, modify, distribute, and sell this software and its |
| 6 | documentation for any purpose is hereby granted without fee, provided that |
| 7 | the above copyright notice appear in all copies and that both that |
| 8 | copyright notice and this permission notice appear in supporting |
| 9 | documentation. |
| 10 | |
| 11 | The above copyright notice and this permission notice shall be included in |
| 12 | all copies or substantial portions of the Software. |
| 13 | |
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 20 | |
| 21 | Except as contained in this notice, the name of The Open Group shall not be |
| 22 | used in advertising or otherwise to promote the sale, use or other dealings |
| 23 | in this Software without prior written authorization from The Open Group. |
| 24 | |
| 25 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. |
| 26 | |
| 27 | All Rights Reserved |
| 28 | |
| 29 | Permission to use, copy, modify, and distribute this software and its |
| 30 | documentation for any purpose and without fee is hereby granted, |
| 31 | provided that the above copyright notice appear in all copies and that |
| 32 | both that copyright notice and this permission notice appear in |
| 33 | supporting documentation, and that the name of Digital not be |
| 34 | used in advertising or publicity pertaining to distribution of the |
| 35 | software without specific, written prior permission. |
| 36 | |
| 37 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 38 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| 39 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| 40 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 41 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| 42 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 43 | SOFTWARE. |
| 44 | |
| 45 | ******************************************************************/ |
| 46 | |
| 47 | #ifdef HAVE_DIX_CONFIG_H |
| 48 | #include <dix-config.h> |
| 49 | #endif |
| 50 | |
| 51 | #include <X11/X.h> |
| 52 | #include <X11/Xmd.h> |
| 53 | #include <X11/Xproto.h> |
| 54 | #include "misc.h" |
| 55 | #include "resource.h" |
| 56 | #include "gcstruct.h" |
| 57 | #include "pixmapstr.h" |
| 58 | #include "dixfontstr.h" |
| 59 | #include "scrnintstr.h" |
| 60 | #include "region.h" |
| 61 | #include "dixstruct.h" |
| 62 | |
| 63 | #include "privates.h" |
| 64 | #include "dix.h" |
| 65 | #include "xace.h" |
| 66 | #include <assert.h> |
| 67 | |
| 68 | extern FontPtr defaultFont; |
| 69 | |
| 70 | static Bool CreateDefaultTile(GCPtr pGC); |
| 71 | |
| 72 | static unsigned char DefaultDash[2] = { 4, 4 }; |
| 73 | |
| 74 | void |
| 75 | ValidateGC(DrawablePtr pDraw, GC * pGC) |
| 76 | { |
| 77 | (*pGC->funcs->ValidateGC) (pGC, pGC->stateChanges, pDraw); |
| 78 | pGC->stateChanges = 0; |
| 79 | pGC->serialNumber = pDraw->serialNumber; |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * ChangeGC/ChangeGCXIDs: |
| 84 | * |
| 85 | * The client performing the gc change must be passed so that access |
| 86 | * checks can be performed on any tiles, stipples, or fonts that are |
| 87 | * specified. ddxen can call this too; they should normally pass |
| 88 | * NullClient for the client since any access checking should have |
| 89 | * already been done at a higher level. |
| 90 | * |
| 91 | * If you have any XIDs, you must use ChangeGCXIDs: |
| 92 | * |
| 93 | * CARD32 v[2]; |
| 94 | * v[0] = FillTiled; |
| 95 | * v[1] = pid; |
| 96 | * ChangeGCXIDs(client, pGC, GCFillStyle|GCTile, v); |
| 97 | * |
| 98 | * However, if you need to pass a pointer to a pixmap or font, you must |
| 99 | * use ChangeGC: |
| 100 | * |
| 101 | * ChangeGCVal v[2]; |
| 102 | * v[0].val = FillTiled; |
| 103 | * v[1].ptr = pPixmap; |
| 104 | * ChangeGC(client, pGC, GCFillStyle|GCTile, v); |
| 105 | * |
| 106 | * If you have neither XIDs nor pointers, you can use either function, |
| 107 | * but ChangeGC will do less work. |
| 108 | * |
| 109 | * ChangeGCVal v[2]; |
| 110 | * v[0].val = foreground; |
| 111 | * v[1].val = background; |
| 112 | * ChangeGC(client, pGC, GCForeground|GCBackground, v); |
| 113 | */ |
| 114 | |
| 115 | #define NEXTVAL(_type, _var) { \ |
| 116 | _var = (_type)(pUnion->val); pUnion++; \ |
| 117 | } |
| 118 | |
| 119 | #define NEXT_PTR(_type, _var) { \ |
| 120 | _var = (_type)pUnion->ptr; pUnion++; } |
| 121 | |
| 122 | int |
| 123 | ChangeGC(ClientPtr client, GC * pGC, BITS32 mask, ChangeGCValPtr pUnion) |
| 124 | { |
| 125 | BITS32 index2; |
| 126 | int error = 0; |
| 127 | PixmapPtr pPixmap; |
| 128 | BITS32 maskQ; |
| 129 | |
| 130 | assert(pUnion); |
| 131 | pGC->serialNumber |= GC_CHANGE_SERIAL_BIT; |
| 132 | |
| 133 | maskQ = mask; /* save these for when we walk the GCque */ |
| 134 | while (mask && !error) { |
| 135 | index2 = (BITS32) lowbit(mask); |
| 136 | mask &= ~index2; |
| 137 | pGC->stateChanges |= index2; |
| 138 | switch (index2) { |
| 139 | case GCFunction: |
| 140 | { |
| 141 | CARD8 newalu; |
| 142 | NEXTVAL(CARD8, newalu); |
| 143 | |
| 144 | if (newalu <= GXset) |
| 145 | pGC->alu = newalu; |
| 146 | else { |
| 147 | if (client) |
| 148 | client->errorValue = newalu; |
| 149 | error = BadValue; |
| 150 | } |
| 151 | break; |
| 152 | } |
| 153 | case GCPlaneMask: |
| 154 | NEXTVAL(unsigned long, pGC->planemask); |
| 155 | |
| 156 | break; |
| 157 | case GCForeground: |
| 158 | NEXTVAL(unsigned long, pGC->fgPixel); |
| 159 | |
| 160 | /* |
| 161 | * this is for CreateGC |
| 162 | */ |
| 163 | if (!pGC->tileIsPixel && !pGC->tile.pixmap) { |
| 164 | pGC->tileIsPixel = TRUE; |
| 165 | pGC->tile.pixel = pGC->fgPixel; |
| 166 | } |
| 167 | break; |
| 168 | case GCBackground: |
| 169 | NEXTVAL(unsigned long, pGC->bgPixel); |
| 170 | |
| 171 | break; |
| 172 | case GCLineWidth: /* ??? line width is a CARD16 */ |
| 173 | NEXTVAL(CARD16, pGC->lineWidth); |
| 174 | |
| 175 | break; |
| 176 | case GCLineStyle: |
| 177 | { |
| 178 | unsigned int newlinestyle; |
| 179 | NEXTVAL(unsigned int, newlinestyle); |
| 180 | |
| 181 | if (newlinestyle <= LineDoubleDash) |
| 182 | pGC->lineStyle = newlinestyle; |
| 183 | else { |
| 184 | if (client) |
| 185 | client->errorValue = newlinestyle; |
| 186 | error = BadValue; |
| 187 | } |
| 188 | break; |
| 189 | } |
| 190 | case GCCapStyle: |
| 191 | { |
| 192 | unsigned int newcapstyle; |
| 193 | NEXTVAL(unsigned int, newcapstyle); |
| 194 | |
| 195 | if (newcapstyle <= CapProjecting) |
| 196 | pGC->capStyle = newcapstyle; |
| 197 | else { |
| 198 | if (client) |
| 199 | client->errorValue = newcapstyle; |
| 200 | error = BadValue; |
| 201 | } |
| 202 | break; |
| 203 | } |
| 204 | case GCJoinStyle: |
| 205 | { |
| 206 | unsigned int newjoinstyle; |
| 207 | NEXTVAL(unsigned int, newjoinstyle); |
| 208 | |
| 209 | if (newjoinstyle <= JoinBevel) |
| 210 | pGC->joinStyle = newjoinstyle; |
| 211 | else { |
| 212 | if (client) |
| 213 | client->errorValue = newjoinstyle; |
| 214 | error = BadValue; |
| 215 | } |
| 216 | break; |
| 217 | } |
| 218 | case GCFillStyle: |
| 219 | { |
| 220 | unsigned int newfillstyle; |
| 221 | NEXTVAL(unsigned int, newfillstyle); |
| 222 | |
| 223 | if (newfillstyle <= FillOpaqueStippled) |
| 224 | pGC->fillStyle = newfillstyle; |
| 225 | else { |
| 226 | if (client) |
| 227 | client->errorValue = newfillstyle; |
| 228 | error = BadValue; |
| 229 | } |
| 230 | break; |
| 231 | } |
| 232 | case GCFillRule: |
| 233 | { |
| 234 | unsigned int newfillrule; |
| 235 | NEXTVAL(unsigned int, newfillrule); |
| 236 | |
| 237 | if (newfillrule <= WindingRule) |
| 238 | pGC->fillRule = newfillrule; |
| 239 | else { |
| 240 | if (client) |
| 241 | client->errorValue = newfillrule; |
| 242 | error = BadValue; |
| 243 | } |
| 244 | break; |
| 245 | } |
| 246 | case GCTile: |
| 247 | NEXT_PTR(PixmapPtr, pPixmap); |
| 248 | |
| 249 | if ((pPixmap->drawable.depth != pGC->depth) || |
| 250 | (pPixmap->drawable.pScreen != pGC->pScreen)) { |
| 251 | error = BadMatch; |
| 252 | } |
| 253 | else { |
| 254 | pPixmap->refcnt++; |
| 255 | if (!pGC->tileIsPixel) |
| 256 | (*pGC->pScreen->DestroyPixmap) (pGC->tile.pixmap); |
| 257 | pGC->tileIsPixel = FALSE; |
| 258 | pGC->tile.pixmap = pPixmap; |
| 259 | } |
| 260 | break; |
| 261 | case GCStipple: |
| 262 | NEXT_PTR(PixmapPtr, pPixmap); |
| 263 | |
| 264 | if ((pPixmap->drawable.depth != 1) || |
| 265 | (pPixmap->drawable.pScreen != pGC->pScreen)) { |
| 266 | error = BadMatch; |
| 267 | } |
| 268 | else { |
| 269 | pPixmap->refcnt++; |
| 270 | if (pGC->stipple) |
| 271 | (*pGC->pScreen->DestroyPixmap) (pGC->stipple); |
| 272 | pGC->stipple = pPixmap; |
| 273 | } |
| 274 | break; |
| 275 | case GCTileStipXOrigin: |
| 276 | NEXTVAL(INT16, pGC->patOrg.x); |
| 277 | |
| 278 | break; |
| 279 | case GCTileStipYOrigin: |
| 280 | NEXTVAL(INT16, pGC->patOrg.y); |
| 281 | |
| 282 | break; |
| 283 | case GCFont: |
| 284 | { |
| 285 | FontPtr pFont; |
| 286 | NEXT_PTR(FontPtr, pFont); |
| 287 | |
| 288 | pFont->refcnt++; |
| 289 | if (pGC->font) |
| 290 | CloseFont(pGC->font, (Font) 0); |
| 291 | pGC->font = pFont; |
| 292 | break; |
| 293 | } |
| 294 | case GCSubwindowMode: |
| 295 | { |
| 296 | unsigned int newclipmode; |
| 297 | NEXTVAL(unsigned int, newclipmode); |
| 298 | |
| 299 | if (newclipmode <= IncludeInferiors) |
| 300 | pGC->subWindowMode = newclipmode; |
| 301 | else { |
| 302 | if (client) |
| 303 | client->errorValue = newclipmode; |
| 304 | error = BadValue; |
| 305 | } |
| 306 | break; |
| 307 | } |
| 308 | case GCGraphicsExposures: |
| 309 | { |
| 310 | unsigned int newge; |
| 311 | NEXTVAL(unsigned int, newge); |
| 312 | |
| 313 | if (newge <= xTrue) |
| 314 | pGC->graphicsExposures = newge; |
| 315 | else { |
| 316 | if (client) |
| 317 | client->errorValue = newge; |
| 318 | error = BadValue; |
| 319 | } |
| 320 | break; |
| 321 | } |
| 322 | case GCClipXOrigin: |
| 323 | NEXTVAL(INT16, pGC->clipOrg.x); |
| 324 | |
| 325 | break; |
| 326 | case GCClipYOrigin: |
| 327 | NEXTVAL(INT16, pGC->clipOrg.y); |
| 328 | |
| 329 | break; |
| 330 | case GCClipMask: |
| 331 | NEXT_PTR(PixmapPtr, pPixmap); |
| 332 | |
| 333 | if (pPixmap) { |
| 334 | if ((pPixmap->drawable.depth != 1) || |
| 335 | (pPixmap->drawable.pScreen != pGC->pScreen)) { |
| 336 | error = BadMatch; |
| 337 | break; |
| 338 | } |
| 339 | pPixmap->refcnt++; |
| 340 | } |
| 341 | (*pGC->funcs->ChangeClip) (pGC, pPixmap ? CT_PIXMAP : CT_NONE, |
| 342 | (pointer) pPixmap, 0); |
| 343 | break; |
| 344 | case GCDashOffset: |
| 345 | NEXTVAL(INT16, pGC->dashOffset); |
| 346 | |
| 347 | break; |
| 348 | case GCDashList: |
| 349 | { |
| 350 | CARD8 newdash; |
| 351 | NEXTVAL(CARD8, newdash); |
| 352 | |
| 353 | if (newdash == 4) { |
| 354 | if (pGC->dash != DefaultDash) { |
| 355 | free(pGC->dash); |
| 356 | pGC->numInDashList = 2; |
| 357 | pGC->dash = DefaultDash; |
| 358 | } |
| 359 | } |
| 360 | else if (newdash != 0) { |
| 361 | unsigned char *dash; |
| 362 | |
| 363 | dash = malloc(2 * sizeof(unsigned char)); |
| 364 | if (dash) { |
| 365 | if (pGC->dash != DefaultDash) |
| 366 | free(pGC->dash); |
| 367 | pGC->numInDashList = 2; |
| 368 | pGC->dash = dash; |
| 369 | dash[0] = newdash; |
| 370 | dash[1] = newdash; |
| 371 | } |
| 372 | else |
| 373 | error = BadAlloc; |
| 374 | } |
| 375 | else { |
| 376 | if (client) |
| 377 | client->errorValue = newdash; |
| 378 | error = BadValue; |
| 379 | } |
| 380 | break; |
| 381 | } |
| 382 | case GCArcMode: |
| 383 | { |
| 384 | unsigned int newarcmode; |
| 385 | NEXTVAL(unsigned int, newarcmode); |
| 386 | |
| 387 | if (newarcmode <= ArcPieSlice) |
| 388 | pGC->arcMode = newarcmode; |
| 389 | else { |
| 390 | if (client) |
| 391 | client->errorValue = newarcmode; |
| 392 | error = BadValue; |
| 393 | } |
| 394 | break; |
| 395 | } |
| 396 | default: |
| 397 | if (client) |
| 398 | client->errorValue = maskQ; |
| 399 | error = BadValue; |
| 400 | break; |
| 401 | } |
| 402 | } /* end while mask && !error */ |
| 403 | |
| 404 | if (pGC->fillStyle == FillTiled && pGC->tileIsPixel) { |
| 405 | if (!CreateDefaultTile(pGC)) { |
| 406 | pGC->fillStyle = FillSolid; |
| 407 | error = BadAlloc; |
| 408 | } |
| 409 | } |
| 410 | (*pGC->funcs->ChangeGC) (pGC, maskQ); |
| 411 | return error; |
| 412 | } |
| 413 | |
| 414 | #undef NEXTVAL |
| 415 | #undef NEXT_PTR |
| 416 | |
| 417 | static const struct { |
| 418 | BITS32 mask; |
| 419 | RESTYPE type; |
| 420 | Mask access_mode; |
| 421 | } xidfields[] = { |
| 422 | {GCTile, RT_PIXMAP, DixReadAccess}, |
| 423 | {GCStipple, RT_PIXMAP, DixReadAccess}, |
| 424 | {GCFont, RT_FONT, DixUseAccess}, |
| 425 | {GCClipMask, RT_PIXMAP, DixReadAccess}, |
| 426 | }; |
| 427 | |
| 428 | int |
| 429 | ChangeGCXIDs(ClientPtr client, GC * pGC, BITS32 mask, CARD32 *pC32) |
| 430 | { |
| 431 | ChangeGCVal vals[GCLastBit + 1]; |
| 432 | int i; |
| 433 | |
| 434 | if (mask & ~GCAllBits) { |
| 435 | client->errorValue = mask; |
| 436 | return BadValue; |
| 437 | } |
| 438 | for (i = Ones(mask); i--;) |
| 439 | vals[i].val = pC32[i]; |
| 440 | for (i = 0; i < sizeof(xidfields) / sizeof(*xidfields); ++i) { |
| 441 | int offset, rc; |
| 442 | |
| 443 | if (!(mask & xidfields[i].mask)) |
| 444 | continue; |
| 445 | offset = Ones(mask & (xidfields[i].mask - 1)); |
| 446 | if (xidfields[i].mask == GCClipMask && vals[offset].val == None) { |
| 447 | vals[offset].ptr = NullPixmap; |
| 448 | continue; |
| 449 | } |
| 450 | rc = dixLookupResourceByType(&vals[offset].ptr, vals[offset].val, |
| 451 | xidfields[i].type, client, |
| 452 | xidfields[i].access_mode); |
| 453 | if (rc != Success) { |
| 454 | client->errorValue = vals[offset].val; |
| 455 | return rc; |
| 456 | } |
| 457 | } |
| 458 | return ChangeGC(client, pGC, mask, vals); |
| 459 | } |
| 460 | |
| 461 | static GCPtr |
| 462 | NewGCObject(ScreenPtr pScreen, int depth) |
| 463 | { |
| 464 | GCPtr pGC; |
| 465 | |
| 466 | pGC = dixAllocateScreenObjectWithPrivates(pScreen, GC, PRIVATE_GC); |
| 467 | if (!pGC) { |
| 468 | return (GCPtr) NULL; |
| 469 | } |
| 470 | |
| 471 | pGC->pScreen = pScreen; |
| 472 | pGC->depth = depth; |
| 473 | pGC->alu = GXcopy; /* dst <- src */ |
| 474 | pGC->planemask = ~0; |
| 475 | pGC->serialNumber = 0; |
| 476 | pGC->funcs = 0; |
| 477 | pGC->fgPixel = 0; |
| 478 | pGC->bgPixel = 1; |
| 479 | pGC->lineWidth = 0; |
| 480 | pGC->lineStyle = LineSolid; |
| 481 | pGC->capStyle = CapButt; |
| 482 | pGC->joinStyle = JoinMiter; |
| 483 | pGC->fillStyle = FillSolid; |
| 484 | pGC->fillRule = EvenOddRule; |
| 485 | pGC->arcMode = ArcPieSlice; |
| 486 | pGC->tile.pixel = 0; |
| 487 | pGC->tile.pixmap = NullPixmap; |
| 488 | |
| 489 | pGC->tileIsPixel = TRUE; |
| 490 | pGC->patOrg.x = 0; |
| 491 | pGC->patOrg.y = 0; |
| 492 | pGC->subWindowMode = ClipByChildren; |
| 493 | pGC->graphicsExposures = TRUE; |
| 494 | pGC->clipOrg.x = 0; |
| 495 | pGC->clipOrg.y = 0; |
| 496 | pGC->clientClipType = CT_NONE; |
| 497 | pGC->clientClip = (pointer) NULL; |
| 498 | pGC->numInDashList = 2; |
| 499 | pGC->dash = DefaultDash; |
| 500 | pGC->dashOffset = 0; |
| 501 | |
| 502 | /* use the default font and stipple */ |
| 503 | pGC->font = defaultFont; |
| 504 | if (pGC->font) /* necessary, because open of default font could fail */ |
| 505 | pGC->font->refcnt++; |
| 506 | pGC->stipple = pGC->pScreen->PixmapPerDepth[0]; |
| 507 | if (pGC->stipple) |
| 508 | pGC->stipple->refcnt++; |
| 509 | |
| 510 | /* this is not a scratch GC */ |
| 511 | pGC->scratch_inuse = FALSE; |
| 512 | return pGC; |
| 513 | } |
| 514 | |
| 515 | /* CreateGC(pDrawable, mask, pval, pStatus) |
| 516 | creates a default GC for the given drawable, using mask to fill |
| 517 | in any non-default values. |
| 518 | Returns a pointer to the new GC on success, NULL otherwise. |
| 519 | returns status of non-default fields in pStatus |
| 520 | BUG: |
| 521 | should check for failure to create default tile |
| 522 | |
| 523 | */ |
| 524 | GCPtr |
| 525 | CreateGC(DrawablePtr pDrawable, BITS32 mask, XID *pval, int *pStatus, |
| 526 | XID gcid, ClientPtr client) |
| 527 | { |
| 528 | GCPtr pGC; |
| 529 | |
| 530 | pGC = NewGCObject(pDrawable->pScreen, pDrawable->depth); |
| 531 | if (!pGC) { |
| 532 | *pStatus = BadAlloc; |
| 533 | return (GCPtr) NULL; |
| 534 | } |
| 535 | |
| 536 | pGC->serialNumber = GC_CHANGE_SERIAL_BIT; |
| 537 | if (mask & GCForeground) { |
| 538 | /* |
| 539 | * magic special case -- ChangeGC checks for this condition |
| 540 | * and snags the Foreground value to create a pseudo default-tile |
| 541 | */ |
| 542 | pGC->tileIsPixel = FALSE; |
| 543 | } |
| 544 | else { |
| 545 | pGC->tileIsPixel = TRUE; |
| 546 | } |
| 547 | |
| 548 | /* security creation/labeling check */ |
| 549 | *pStatus = XaceHook(XACE_RESOURCE_ACCESS, client, gcid, RT_GC, pGC, |
| 550 | RT_NONE, NULL, DixCreateAccess | DixSetAttrAccess); |
| 551 | if (*pStatus != Success) |
| 552 | goto out; |
| 553 | |
| 554 | pGC->stateChanges = GCAllBits; |
| 555 | if (!(*pGC->pScreen->CreateGC) (pGC)) |
| 556 | *pStatus = BadAlloc; |
| 557 | else if (mask) |
| 558 | *pStatus = ChangeGCXIDs(client, pGC, mask, pval); |
| 559 | else |
| 560 | *pStatus = Success; |
| 561 | |
| 562 | out: |
| 563 | if (*pStatus != Success) { |
| 564 | if (!pGC->tileIsPixel && !pGC->tile.pixmap) |
| 565 | pGC->tileIsPixel = TRUE; /* undo special case */ |
| 566 | FreeGC(pGC, (XID) 0); |
| 567 | pGC = (GCPtr) NULL; |
| 568 | } |
| 569 | |
| 570 | return pGC; |
| 571 | } |
| 572 | |
| 573 | static Bool |
| 574 | CreateDefaultTile(GCPtr pGC) |
| 575 | { |
| 576 | ChangeGCVal tmpval[3]; |
| 577 | PixmapPtr pTile; |
| 578 | GCPtr pgcScratch; |
| 579 | xRectangle rect; |
| 580 | CARD16 w, h; |
| 581 | |
| 582 | w = 1; |
| 583 | h = 1; |
| 584 | (*pGC->pScreen->QueryBestSize) (TileShape, &w, &h, pGC->pScreen); |
| 585 | pTile = (PixmapPtr) |
| 586 | (*pGC->pScreen->CreatePixmap) (pGC->pScreen, w, h, pGC->depth, 0); |
| 587 | pgcScratch = GetScratchGC(pGC->depth, pGC->pScreen); |
| 588 | if (!pTile || !pgcScratch) { |
| 589 | if (pTile) |
| 590 | (*pTile->drawable.pScreen->DestroyPixmap) (pTile); |
| 591 | if (pgcScratch) |
| 592 | FreeScratchGC(pgcScratch); |
| 593 | return FALSE; |
| 594 | } |
| 595 | tmpval[0].val = GXcopy; |
| 596 | tmpval[1].val = pGC->tile.pixel; |
| 597 | tmpval[2].val = FillSolid; |
| 598 | (void) ChangeGC(NullClient, pgcScratch, |
| 599 | GCFunction | GCForeground | GCFillStyle, tmpval); |
| 600 | ValidateGC((DrawablePtr) pTile, pgcScratch); |
| 601 | rect.x = 0; |
| 602 | rect.y = 0; |
| 603 | rect.width = w; |
| 604 | rect.height = h; |
| 605 | (*pgcScratch->ops->PolyFillRect) ((DrawablePtr) pTile, pgcScratch, 1, |
| 606 | &rect); |
| 607 | /* Always remember to free the scratch graphics context after use. */ |
| 608 | FreeScratchGC(pgcScratch); |
| 609 | |
| 610 | pGC->tileIsPixel = FALSE; |
| 611 | pGC->tile.pixmap = pTile; |
| 612 | return TRUE; |
| 613 | } |
| 614 | |
| 615 | int |
| 616 | CopyGC(GC * pgcSrc, GC * pgcDst, BITS32 mask) |
| 617 | { |
| 618 | BITS32 index2; |
| 619 | BITS32 maskQ; |
| 620 | int error = 0; |
| 621 | |
| 622 | if (pgcSrc == pgcDst) |
| 623 | return Success; |
| 624 | pgcDst->serialNumber |= GC_CHANGE_SERIAL_BIT; |
| 625 | pgcDst->stateChanges |= mask; |
| 626 | maskQ = mask; |
| 627 | while (mask) { |
| 628 | index2 = (BITS32) lowbit(mask); |
| 629 | mask &= ~index2; |
| 630 | switch (index2) { |
| 631 | case GCFunction: |
| 632 | pgcDst->alu = pgcSrc->alu; |
| 633 | break; |
| 634 | case GCPlaneMask: |
| 635 | pgcDst->planemask = pgcSrc->planemask; |
| 636 | break; |
| 637 | case GCForeground: |
| 638 | pgcDst->fgPixel = pgcSrc->fgPixel; |
| 639 | break; |
| 640 | case GCBackground: |
| 641 | pgcDst->bgPixel = pgcSrc->bgPixel; |
| 642 | break; |
| 643 | case GCLineWidth: |
| 644 | pgcDst->lineWidth = pgcSrc->lineWidth; |
| 645 | break; |
| 646 | case GCLineStyle: |
| 647 | pgcDst->lineStyle = pgcSrc->lineStyle; |
| 648 | break; |
| 649 | case GCCapStyle: |
| 650 | pgcDst->capStyle = pgcSrc->capStyle; |
| 651 | break; |
| 652 | case GCJoinStyle: |
| 653 | pgcDst->joinStyle = pgcSrc->joinStyle; |
| 654 | break; |
| 655 | case GCFillStyle: |
| 656 | pgcDst->fillStyle = pgcSrc->fillStyle; |
| 657 | break; |
| 658 | case GCFillRule: |
| 659 | pgcDst->fillRule = pgcSrc->fillRule; |
| 660 | break; |
| 661 | case GCTile: |
| 662 | { |
| 663 | if (EqualPixUnion(pgcDst->tileIsPixel, |
| 664 | pgcDst->tile, |
| 665 | pgcSrc->tileIsPixel, pgcSrc->tile)) { |
| 666 | break; |
| 667 | } |
| 668 | if (!pgcDst->tileIsPixel) |
| 669 | (*pgcDst->pScreen->DestroyPixmap) (pgcDst->tile.pixmap); |
| 670 | pgcDst->tileIsPixel = pgcSrc->tileIsPixel; |
| 671 | pgcDst->tile = pgcSrc->tile; |
| 672 | if (!pgcDst->tileIsPixel) |
| 673 | pgcDst->tile.pixmap->refcnt++; |
| 674 | break; |
| 675 | } |
| 676 | case GCStipple: |
| 677 | { |
| 678 | if (pgcDst->stipple == pgcSrc->stipple) |
| 679 | break; |
| 680 | if (pgcDst->stipple) |
| 681 | (*pgcDst->pScreen->DestroyPixmap) (pgcDst->stipple); |
| 682 | pgcDst->stipple = pgcSrc->stipple; |
| 683 | if (pgcDst->stipple) |
| 684 | pgcDst->stipple->refcnt++; |
| 685 | break; |
| 686 | } |
| 687 | case GCTileStipXOrigin: |
| 688 | pgcDst->patOrg.x = pgcSrc->patOrg.x; |
| 689 | break; |
| 690 | case GCTileStipYOrigin: |
| 691 | pgcDst->patOrg.y = pgcSrc->patOrg.y; |
| 692 | break; |
| 693 | case GCFont: |
| 694 | if (pgcDst->font == pgcSrc->font) |
| 695 | break; |
| 696 | if (pgcDst->font) |
| 697 | CloseFont(pgcDst->font, (Font) 0); |
| 698 | if ((pgcDst->font = pgcSrc->font) != NullFont) |
| 699 | (pgcDst->font)->refcnt++; |
| 700 | break; |
| 701 | case GCSubwindowMode: |
| 702 | pgcDst->subWindowMode = pgcSrc->subWindowMode; |
| 703 | break; |
| 704 | case GCGraphicsExposures: |
| 705 | pgcDst->graphicsExposures = pgcSrc->graphicsExposures; |
| 706 | break; |
| 707 | case GCClipXOrigin: |
| 708 | pgcDst->clipOrg.x = pgcSrc->clipOrg.x; |
| 709 | break; |
| 710 | case GCClipYOrigin: |
| 711 | pgcDst->clipOrg.y = pgcSrc->clipOrg.y; |
| 712 | break; |
| 713 | case GCClipMask: |
| 714 | (*pgcDst->funcs->CopyClip) (pgcDst, pgcSrc); |
| 715 | break; |
| 716 | case GCDashOffset: |
| 717 | pgcDst->dashOffset = pgcSrc->dashOffset; |
| 718 | break; |
| 719 | case GCDashList: |
| 720 | if (pgcSrc->dash == DefaultDash) { |
| 721 | if (pgcDst->dash != DefaultDash) { |
| 722 | free(pgcDst->dash); |
| 723 | pgcDst->numInDashList = pgcSrc->numInDashList; |
| 724 | pgcDst->dash = pgcSrc->dash; |
| 725 | } |
| 726 | } |
| 727 | else { |
| 728 | unsigned char *dash; |
| 729 | unsigned int i; |
| 730 | |
| 731 | dash = malloc(pgcSrc->numInDashList * sizeof(unsigned char)); |
| 732 | if (dash) { |
| 733 | if (pgcDst->dash != DefaultDash) |
| 734 | free(pgcDst->dash); |
| 735 | pgcDst->numInDashList = pgcSrc->numInDashList; |
| 736 | pgcDst->dash = dash; |
| 737 | for (i = 0; i < pgcSrc->numInDashList; i++) |
| 738 | dash[i] = pgcSrc->dash[i]; |
| 739 | } |
| 740 | else |
| 741 | error = BadAlloc; |
| 742 | } |
| 743 | break; |
| 744 | case GCArcMode: |
| 745 | pgcDst->arcMode = pgcSrc->arcMode; |
| 746 | break; |
| 747 | default: |
| 748 | FatalError("CopyGC: Unhandled mask!\n"); |
| 749 | } |
| 750 | } |
| 751 | if (pgcDst->fillStyle == FillTiled && pgcDst->tileIsPixel) { |
| 752 | if (!CreateDefaultTile(pgcDst)) { |
| 753 | pgcDst->fillStyle = FillSolid; |
| 754 | error = BadAlloc; |
| 755 | } |
| 756 | } |
| 757 | (*pgcDst->funcs->CopyGC) (pgcSrc, maskQ, pgcDst); |
| 758 | return error; |
| 759 | } |
| 760 | |
| 761 | /** |
| 762 | * does the diX part of freeing the characteristics in the GC. |
| 763 | * |
| 764 | * \param value must conform to DeleteType |
| 765 | */ |
| 766 | int |
| 767 | FreeGC(pointer value, XID gid) |
| 768 | { |
| 769 | GCPtr pGC = (GCPtr) value; |
| 770 | |
| 771 | CloseFont(pGC->font, (Font) 0); |
| 772 | (*pGC->funcs->DestroyClip) (pGC); |
| 773 | |
| 774 | if (!pGC->tileIsPixel) |
| 775 | (*pGC->pScreen->DestroyPixmap) (pGC->tile.pixmap); |
| 776 | if (pGC->stipple) |
| 777 | (*pGC->pScreen->DestroyPixmap) (pGC->stipple); |
| 778 | |
| 779 | (*pGC->funcs->DestroyGC) (pGC); |
| 780 | if (pGC->dash != DefaultDash) |
| 781 | free(pGC->dash); |
| 782 | dixFreeObjectWithPrivates(pGC, PRIVATE_GC); |
| 783 | return Success; |
| 784 | } |
| 785 | |
| 786 | /* CreateScratchGC(pScreen, depth) |
| 787 | like CreateGC, but doesn't do the default tile or stipple, |
| 788 | since we can't create them without already having a GC. any code |
| 789 | using the tile or stipple has to set them explicitly anyway, |
| 790 | since the state of the scratch gc is unknown. This is OK |
| 791 | because ChangeGC() has to be able to deal with NULL tiles and |
| 792 | stipples anyway (in case the CreateGC() call has provided a |
| 793 | value for them -- we can't set the default tile until the |
| 794 | client-supplied attributes are installed, since the fgPixel |
| 795 | is what fills the default tile. (maybe this comment should |
| 796 | go with CreateGC() or ChangeGC().) |
| 797 | */ |
| 798 | |
| 799 | static GCPtr |
| 800 | CreateScratchGC(ScreenPtr pScreen, unsigned depth) |
| 801 | { |
| 802 | GCPtr pGC; |
| 803 | |
| 804 | pGC = NewGCObject(pScreen, depth); |
| 805 | if (!pGC) |
| 806 | return (GCPtr) NULL; |
| 807 | |
| 808 | pGC->stateChanges = GCAllBits; |
| 809 | if (!(*pScreen->CreateGC) (pGC)) { |
| 810 | FreeGC(pGC, (XID) 0); |
| 811 | pGC = (GCPtr) NULL; |
| 812 | } |
| 813 | return pGC; |
| 814 | } |
| 815 | |
| 816 | void |
| 817 | FreeGCperDepth(int screenNum) |
| 818 | { |
| 819 | int i; |
| 820 | ScreenPtr pScreen; |
| 821 | GCPtr *ppGC; |
| 822 | |
| 823 | pScreen = screenInfo.screens[screenNum]; |
| 824 | ppGC = pScreen->GCperDepth; |
| 825 | |
| 826 | for (i = 0; i <= pScreen->numDepths; i++) { |
| 827 | (void) FreeGC(ppGC[i], (XID) 0); |
| 828 | ppGC[i] = NULL; |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | Bool |
| 833 | CreateGCperDepth(int screenNum) |
| 834 | { |
| 835 | int i; |
| 836 | ScreenPtr pScreen; |
| 837 | DepthPtr pDepth; |
| 838 | GCPtr *ppGC; |
| 839 | |
| 840 | pScreen = screenInfo.screens[screenNum]; |
| 841 | ppGC = pScreen->GCperDepth; |
| 842 | /* do depth 1 separately because it's not included in list */ |
| 843 | if (!(ppGC[0] = CreateScratchGC(pScreen, 1))) |
| 844 | return FALSE; |
| 845 | ppGC[0]->graphicsExposures = FALSE; |
| 846 | /* Make sure we don't overflow GCperDepth[] */ |
| 847 | if (pScreen->numDepths > MAXFORMATS) |
| 848 | return FALSE; |
| 849 | |
| 850 | pDepth = pScreen->allowedDepths; |
| 851 | for (i = 0; i < pScreen->numDepths; i++, pDepth++) { |
| 852 | if (!(ppGC[i + 1] = CreateScratchGC(pScreen, pDepth->depth))) { |
| 853 | for (; i >= 0; i--) |
| 854 | (void) FreeGC(ppGC[i], (XID) 0); |
| 855 | return FALSE; |
| 856 | } |
| 857 | ppGC[i + 1]->graphicsExposures = FALSE; |
| 858 | } |
| 859 | return TRUE; |
| 860 | } |
| 861 | |
| 862 | Bool |
| 863 | CreateDefaultStipple(int screenNum) |
| 864 | { |
| 865 | ScreenPtr pScreen; |
| 866 | ChangeGCVal tmpval[3]; |
| 867 | xRectangle rect; |
| 868 | CARD16 w, h; |
| 869 | GCPtr pgcScratch; |
| 870 | |
| 871 | pScreen = screenInfo.screens[screenNum]; |
| 872 | |
| 873 | w = 16; |
| 874 | h = 16; |
| 875 | (*pScreen->QueryBestSize) (StippleShape, &w, &h, pScreen); |
| 876 | if (!(pScreen->PixmapPerDepth[0] = |
| 877 | (*pScreen->CreatePixmap) (pScreen, w, h, 1, 0))) |
| 878 | return FALSE; |
| 879 | /* fill stipple with 1 */ |
| 880 | tmpval[0].val = GXcopy; |
| 881 | tmpval[1].val = 1; |
| 882 | tmpval[2].val = FillSolid; |
| 883 | pgcScratch = GetScratchGC(1, pScreen); |
| 884 | if (!pgcScratch) { |
| 885 | (*pScreen->DestroyPixmap) (pScreen->PixmapPerDepth[0]); |
| 886 | return FALSE; |
| 887 | } |
| 888 | (void) ChangeGC(NullClient, pgcScratch, |
| 889 | GCFunction | GCForeground | GCFillStyle, tmpval); |
| 890 | ValidateGC((DrawablePtr) pScreen->PixmapPerDepth[0], pgcScratch); |
| 891 | rect.x = 0; |
| 892 | rect.y = 0; |
| 893 | rect.width = w; |
| 894 | rect.height = h; |
| 895 | (*pgcScratch->ops->PolyFillRect) ((DrawablePtr) pScreen->PixmapPerDepth[0], |
| 896 | pgcScratch, 1, &rect); |
| 897 | FreeScratchGC(pgcScratch); |
| 898 | return TRUE; |
| 899 | } |
| 900 | |
| 901 | void |
| 902 | FreeDefaultStipple(int screenNum) |
| 903 | { |
| 904 | ScreenPtr pScreen = screenInfo.screens[screenNum]; |
| 905 | |
| 906 | (*pScreen->DestroyPixmap) (pScreen->PixmapPerDepth[0]); |
| 907 | } |
| 908 | |
| 909 | int |
| 910 | SetDashes(GCPtr pGC, unsigned offset, unsigned ndash, unsigned char *pdash) |
| 911 | { |
| 912 | long i; |
| 913 | unsigned char *p, *indash; |
| 914 | BITS32 maskQ = 0; |
| 915 | |
| 916 | i = ndash; |
| 917 | p = pdash; |
| 918 | while (i--) { |
| 919 | if (!*p++) { |
| 920 | /* dash segment must be > 0 */ |
| 921 | return BadValue; |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | if (ndash & 1) |
| 926 | p = malloc(2 * ndash * sizeof(unsigned char)); |
| 927 | else |
| 928 | p = malloc(ndash * sizeof(unsigned char)); |
| 929 | if (!p) |
| 930 | return BadAlloc; |
| 931 | |
| 932 | pGC->serialNumber |= GC_CHANGE_SERIAL_BIT; |
| 933 | if (offset != pGC->dashOffset) { |
| 934 | pGC->dashOffset = offset; |
| 935 | pGC->stateChanges |= GCDashOffset; |
| 936 | maskQ |= GCDashOffset; |
| 937 | } |
| 938 | |
| 939 | if (pGC->dash != DefaultDash) |
| 940 | free(pGC->dash); |
| 941 | pGC->numInDashList = ndash; |
| 942 | pGC->dash = p; |
| 943 | if (ndash & 1) { |
| 944 | pGC->numInDashList += ndash; |
| 945 | indash = pdash; |
| 946 | i = ndash; |
| 947 | while (i--) |
| 948 | *p++ = *indash++; |
| 949 | } |
| 950 | while (ndash--) |
| 951 | *p++ = *pdash++; |
| 952 | pGC->stateChanges |= GCDashList; |
| 953 | maskQ |= GCDashList; |
| 954 | |
| 955 | if (pGC->funcs->ChangeGC) |
| 956 | (*pGC->funcs->ChangeGC) (pGC, maskQ); |
| 957 | return Success; |
| 958 | } |
| 959 | |
| 960 | int |
| 961 | VerifyRectOrder(int nrects, xRectangle *prects, int ordering) |
| 962 | { |
| 963 | xRectangle *prectP, *prectN; |
| 964 | int i; |
| 965 | |
| 966 | switch (ordering) { |
| 967 | case Unsorted: |
| 968 | return CT_UNSORTED; |
| 969 | case YSorted: |
| 970 | if (nrects > 1) { |
| 971 | for (i = 1, prectP = prects, prectN = prects + 1; |
| 972 | i < nrects; i++, prectP++, prectN++) |
| 973 | if (prectN->y < prectP->y) |
| 974 | return -1; |
| 975 | } |
| 976 | return CT_YSORTED; |
| 977 | case YXSorted: |
| 978 | if (nrects > 1) { |
| 979 | for (i = 1, prectP = prects, prectN = prects + 1; |
| 980 | i < nrects; i++, prectP++, prectN++) |
| 981 | if ((prectN->y < prectP->y) || |
| 982 | ((prectN->y == prectP->y) && (prectN->x < prectP->x))) |
| 983 | return -1; |
| 984 | } |
| 985 | return CT_YXSORTED; |
| 986 | case YXBanded: |
| 987 | if (nrects > 1) { |
| 988 | for (i = 1, prectP = prects, prectN = prects + 1; |
| 989 | i < nrects; i++, prectP++, prectN++) |
| 990 | if ((prectN->y != prectP->y && |
| 991 | prectN->y < prectP->y + (int) prectP->height) || |
| 992 | ((prectN->y == prectP->y) && |
| 993 | (prectN->height != prectP->height || |
| 994 | prectN->x < prectP->x + (int) prectP->width))) |
| 995 | return -1; |
| 996 | } |
| 997 | return CT_YXBANDED; |
| 998 | } |
| 999 | return -1; |
| 1000 | } |
| 1001 | |
| 1002 | int |
| 1003 | SetClipRects(GCPtr pGC, int xOrigin, int yOrigin, int nrects, |
| 1004 | xRectangle *prects, int ordering) |
| 1005 | { |
| 1006 | int newct, size; |
| 1007 | xRectangle *prectsNew; |
| 1008 | |
| 1009 | newct = VerifyRectOrder(nrects, prects, ordering); |
| 1010 | if (newct < 0) |
| 1011 | return BadMatch; |
| 1012 | size = nrects * sizeof(xRectangle); |
| 1013 | prectsNew = malloc(size); |
| 1014 | if (!prectsNew && size) |
| 1015 | return BadAlloc; |
| 1016 | |
| 1017 | pGC->serialNumber |= GC_CHANGE_SERIAL_BIT; |
| 1018 | pGC->clipOrg.x = xOrigin; |
| 1019 | pGC->stateChanges |= GCClipXOrigin; |
| 1020 | |
| 1021 | pGC->clipOrg.y = yOrigin; |
| 1022 | pGC->stateChanges |= GCClipYOrigin; |
| 1023 | |
| 1024 | if (size) |
| 1025 | memmove((char *) prectsNew, (char *) prects, size); |
| 1026 | (*pGC->funcs->ChangeClip) (pGC, newct, (pointer) prectsNew, nrects); |
| 1027 | if (pGC->funcs->ChangeGC) |
| 1028 | (*pGC->funcs->ChangeGC) (pGC, |
| 1029 | GCClipXOrigin | GCClipYOrigin | GCClipMask); |
| 1030 | return Success; |
| 1031 | } |
| 1032 | |
| 1033 | /* |
| 1034 | sets reasonable defaults |
| 1035 | if we can get a pre-allocated one, use it and mark it as used. |
| 1036 | if we can't, create one out of whole cloth (The Velveteen GC -- if |
| 1037 | you use it often enough it will become real.) |
| 1038 | */ |
| 1039 | GCPtr |
| 1040 | GetScratchGC(unsigned depth, ScreenPtr pScreen) |
| 1041 | { |
| 1042 | int i; |
| 1043 | GCPtr pGC; |
| 1044 | |
| 1045 | for (i = 0; i <= pScreen->numDepths; i++) { |
| 1046 | pGC = pScreen->GCperDepth[i]; |
| 1047 | if (pGC && pGC->depth == depth && !pGC->scratch_inuse) { |
| 1048 | pGC->scratch_inuse = TRUE; |
| 1049 | |
| 1050 | pGC->alu = GXcopy; |
| 1051 | pGC->planemask = ~0; |
| 1052 | pGC->serialNumber = 0; |
| 1053 | pGC->fgPixel = 0; |
| 1054 | pGC->bgPixel = 1; |
| 1055 | pGC->lineWidth = 0; |
| 1056 | pGC->lineStyle = LineSolid; |
| 1057 | pGC->capStyle = CapButt; |
| 1058 | pGC->joinStyle = JoinMiter; |
| 1059 | pGC->fillStyle = FillSolid; |
| 1060 | pGC->fillRule = EvenOddRule; |
| 1061 | pGC->arcMode = ArcChord; |
| 1062 | pGC->patOrg.x = 0; |
| 1063 | pGC->patOrg.y = 0; |
| 1064 | pGC->subWindowMode = ClipByChildren; |
| 1065 | pGC->graphicsExposures = FALSE; |
| 1066 | pGC->clipOrg.x = 0; |
| 1067 | pGC->clipOrg.y = 0; |
| 1068 | if (pGC->clientClipType != CT_NONE) |
| 1069 | (*pGC->funcs->ChangeClip) (pGC, CT_NONE, NULL, 0); |
| 1070 | pGC->stateChanges = GCAllBits; |
| 1071 | return pGC; |
| 1072 | } |
| 1073 | } |
| 1074 | /* if we make it this far, need to roll our own */ |
| 1075 | pGC = CreateScratchGC(pScreen, depth); |
| 1076 | if (pGC) |
| 1077 | pGC->graphicsExposures = FALSE; |
| 1078 | return pGC; |
| 1079 | } |
| 1080 | |
| 1081 | /* |
| 1082 | if the gc to free is in the table of pre-existing ones, |
| 1083 | mark it as available. |
| 1084 | if not, free it for real |
| 1085 | */ |
| 1086 | void |
| 1087 | FreeScratchGC(GCPtr pGC) |
| 1088 | { |
| 1089 | if (pGC->scratch_inuse) |
| 1090 | pGC->scratch_inuse = FALSE; |
| 1091 | else |
| 1092 | FreeGC(pGC, (GContext) 0); |
| 1093 | } |