src/glx/glx_pbuffer.c

   1 /*
   2  * (C) Copyright IBM Corporation 2004
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file glx_pbuffer.c
  27  * Implementation of pbuffer related functions.
  28  *
  29  * \author Ian Romanick <idr@us.ibm.com>
  30  */
  31
  32 #include <inttypes.h>
  33 #include "glxclient.h"
  34 #include <X11/extensions/extutil.h>
  35 #include <X11/extensions/Xext.h>
  36 #include <assert.h>
  37 #include <string.h>
  38 #include "glxextensions.h"
  39
  40 #ifdef GLX_USE_APPLEGL
  41 #include <pthread.h>
  42 #include "apple_glx_drawable.h"
  43 #include "glx_error.h"
  44 #endif
  45
  46 #define WARN_ONCE_GLX_1_3(a, b) {               \
  47                 static int warned=1;            \
  48                 if(warned) {                    \
  49                         warn_GLX_1_3((a), b );  \
  50                         warned=0;               \
  51                 }                               \
  52         }
  53
  54 /**
  55  * Emit a warning when clients use GLX 1.3 functions on pre-1.3 systems.
  56  */
  57 static void
  58 warn_GLX_1_3(Display * dpy, const char *function_name)
  59 {
  60    struct glx_display *priv = __glXInitialize(dpy);
  61
  62    if (priv->minorVersion < 3) {
  63       fprintf(stderr,
  64               "WARNING: Application calling GLX 1.3 function \"%s\" "
  65               "when GLX 1.3 is not supported!  This is an application bug!\n",
  66               function_name);
  67    }
  68 }
  69
  70 #ifndef GLX_USE_APPLEGL
  71 /**
  72  * Change a drawable's attribute.
  73  *
  74  * This function is used to implement \c glXSelectEvent and
  75  * \c glXSelectEventSGIX.
  76  *
  77  * \note
  78  * This function dynamically determines whether to use the SGIX_pbuffer
  79  * version of the protocol or the GLX 1.3 version of the protocol.
  80  *
  81  * \todo
  82  * This function needs to be modified to work with direct-rendering drivers.
  83  */
  84 static void
  85 ChangeDrawableAttribute(Display * dpy, GLXDrawable drawable,
  86                         const CARD32 * attribs, size_t num_attribs)
  87 {
  88    struct glx_display *priv = __glXInitialize(dpy);
  89    __GLXDRIdrawable *pdraw;
  90    CARD32 *output;
  91    CARD8 opcode;
  92    int i;
  93
  94    if ((dpy == NULL) || (drawable == 0)) {
  95       return;
  96    }
  97
  98    pdraw = GetGLXDRIDrawable(dpy, drawable);
  99
 100    opcode = __glXSetupForCommand(dpy);
 101    if (!opcode)
 102       return;
 103
 104    LockDisplay(dpy);
 105
 106    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 107       xGLXChangeDrawableAttributesReq *req;
 108
 109       GetReqExtra(GLXChangeDrawableAttributes, 8 + (8 * num_attribs), req);
 110       output = (CARD32 *) (req + 1);
 111
 112       req->reqType = opcode;
 113       req->glxCode = X_GLXChangeDrawableAttributes;
 114       req->drawable = drawable;
 115       req->numAttribs = (CARD32) num_attribs;
 116    }
 117    else {
 118       xGLXVendorPrivateWithReplyReq *vpreq;
 119
 120       GetReqExtra(GLXVendorPrivateWithReply, 4 + (8 * num_attribs), vpreq);
 121       output = (CARD32 *) (vpreq + 1);
 122
 123       vpreq->reqType = opcode;
 124       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 125       vpreq->vendorCode = X_GLXvop_ChangeDrawableAttributesSGIX;
 126
 127       output[0] = (CARD32) drawable;
 128       output++;
 129    }
 130
 131    (void) memcpy(output, attribs, sizeof(CARD32) * 2 * num_attribs);
 132
 133    UnlockDisplay(dpy);
 134    SyncHandle();
 135
 136    for (i = 0; i < num_attribs; i++) {
 137       switch(attribs[i * 2]) {
 138       case GLX_EVENT_MASK:
 139          /* Keep a local copy for masking out DRI2 proto events as needed */
 140          pdraw->eventMask = attribs[i * 2 + 1];
 141          break;
 142       }
 143    }
 144
 145    return;
 146 }
 147
 148
 149 #ifdef GLX_DIRECT_RENDERING
 150 static GLenum
 151 determineTextureTarget(const int *attribs, int numAttribs)
 152 {
 153    GLenum target = 0;
 154    int i;
 155
 156    for (i = 0; i < numAttribs; i++) {
 157       if (attribs[2 * i] == GLX_TEXTURE_TARGET_EXT) {
 158          switch (attribs[2 * i + 1]) {
 159          case GLX_TEXTURE_2D_EXT:
 160             target = GL_TEXTURE_2D;
 161             break;
 162          case GLX_TEXTURE_RECTANGLE_EXT:
 163             target = GL_TEXTURE_RECTANGLE_ARB;
 164             break;
 165          }
 166       }
 167    }
 168
 169    return target;
 170 }
 171
 172 static GLenum
 173 determineTextureFormat(const int *attribs, int numAttribs)
 174 {
 175    int i;
 176
 177    for (i = 0; i < numAttribs; i++) {
 178       if (attribs[2 * i] == GLX_TEXTURE_FORMAT_EXT)
 179          return attribs[2 * i + 1];
 180    }
 181
 182    return 0;
 183 }
 184
 185 static void
 186 CreateDRIDrawable(Display *dpy, struct glx_config *config,
 187                   XID drawable, XID glxdrawable,
 188                   const int *attrib_list, size_t num_attribs)
 189 {
 190    struct glx_display *const priv = __glXInitialize(dpy);
 191    __GLXDRIdrawable *pdraw;
 192    struct glx_screen *psc;
 193
 194    psc = priv->screens[config->screen];
 195    if (psc->driScreen == NULL)
 196       return;
 197
 198    pdraw = psc->driScreen->createDrawable(psc, drawable,
 199                                           glxdrawable, config);
 200    if (pdraw == NULL) {
 201       fprintf(stderr, "failed to create drawable\n");
 202       return;
 203    }
 204
 205    if (__glxHashInsert(priv->drawHash, glxdrawable, pdraw)) {
 206       (*pdraw->destroyDrawable) (pdraw);
 207       return; /* FIXME: Check what we're supposed to do here... */
 208    }
 209
 210    pdraw->textureTarget = determineTextureTarget(attrib_list, num_attribs);
 211    pdraw->textureFormat = determineTextureFormat(attrib_list, num_attribs);
 212 }
 213
 214 static void
 215 DestroyDRIDrawable(Display *dpy, GLXDrawable drawable, int destroy_xdrawable)
 216 {
 217    struct glx_display *const priv = __glXInitialize(dpy);
 218    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
 219
 220    if (pdraw != NULL) {
 221       if (destroy_xdrawable)
 222          XFreePixmap(pdraw->psc->dpy, pdraw->xDrawable);
 223       (*pdraw->destroyDrawable) (pdraw);
 224       __glxHashDelete(priv->drawHash, drawable);
 225    }
 226 }
 227
 228 #else
 229
 230 static void
 231 CreateDRIDrawable(Display *dpy, const struct glx_config * fbconfig,
 232                   XID drawable, XID glxdrawable,
 233                   const int *attrib_list, size_t num_attribs)
 234 {
 235 }
 236
 237 static void
 238 DestroyDRIDrawable(Display *dpy, GLXDrawable drawable, int destroy_xdrawable)
 239 {
 240 }
 241
 242 #endif
 243
 244 /**
 245  * Get a drawable's attribute.
 246  *
 247  * This function is used to implement \c glXGetSelectedEvent and
 248  * \c glXGetSelectedEventSGIX.
 249  *
 250  * \note
 251  * This function dynamically determines whether to use the SGIX_pbuffer
 252  * version of the protocol or the GLX 1.3 version of the protocol.
 253  *
 254  * \todo
 255  * The number of attributes returned is likely to be small, probably less than
 256  * 10.  Given that, this routine should try to use an array on the stack to
 257  * capture the reply rather than always calling Xmalloc.
 258  *
 259  * \todo
 260  * This function needs to be modified to work with direct-rendering drivers.
 261  */
 262 static int
 263 GetDrawableAttribute(Display * dpy, GLXDrawable drawable,
 264                      int attribute, unsigned int *value)
 265 {
 266    struct glx_display *priv;
 267    xGLXGetDrawableAttributesReply reply;
 268    CARD32 *data;
 269    CARD8 opcode;
 270    unsigned int length;
 271    unsigned int i;
 272    unsigned int num_attributes;
 273    GLboolean use_glx_1_3;
 274
 275    if ((dpy == NULL) || (drawable == 0)) {
 276       return 0;
 277    }
 278
 279    priv = __glXInitialize(dpy);
 280    use_glx_1_3 = ((priv->majorVersion > 1) || (priv->minorVersion >= 3));
 281
 282    *value = 0;
 283
 284
 285    opcode = __glXSetupForCommand(dpy);
 286    if (!opcode)
 287       return 0;
 288
 289    LockDisplay(dpy);
 290
 291    if (use_glx_1_3) {
 292       xGLXGetDrawableAttributesReq *req;
 293
 294       GetReqExtra(GLXGetDrawableAttributes, 4, req);
 295       req->reqType = opcode;
 296       req->glxCode = X_GLXGetDrawableAttributes;
 297       req->drawable = drawable;
 298    }
 299    else {
 300       xGLXVendorPrivateWithReplyReq *vpreq;
 301
 302       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 303       data = (CARD32 *) (vpreq + 1);
 304       data[0] = (CARD32) drawable;
 305
 306       vpreq->reqType = opcode;
 307       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 308       vpreq->vendorCode = X_GLXvop_GetDrawableAttributesSGIX;
 309    }
 310
 311    _XReply(dpy, (xReply *) & reply, 0, False);
 312
 313    if (reply.type == X_Error) {
 314       UnlockDisplay(dpy);
 315       SyncHandle();
 316       return 0;
 317    }
 318
 319    length = reply.length;
 320    if (length) {
 321       num_attributes = (use_glx_1_3) ? reply.numAttribs : length / 2;
 322       data = (CARD32 *) Xmalloc(length * sizeof(CARD32));
 323       if (data == NULL) {
 324          /* Throw data on the floor */
 325          _XEatData(dpy, length);
 326       }
 327       else {
 328          _XRead(dpy, (char *) data, length * sizeof(CARD32));
 329
 330          /* Search the set of returned attributes for the attribute requested by
 331           * the caller.
 332           */
 333          for (i = 0; i < num_attributes; i++) {
 334             if (data[i * 2] == attribute) {
 335                *value = data[(i * 2) + 1];
 336                break;
 337             }
 338          }
 339
 340 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 341          {
 342             __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
 343
 344             if (pdraw != NULL && !pdraw->textureTarget)
 345                pdraw->textureTarget =
 346                   determineTextureTarget((const int *) data, num_attributes);
 347             if (pdraw != NULL && !pdraw->textureFormat)
 348                pdraw->textureFormat =
 349                   determineTextureFormat((const int *) data, num_attributes);
 350          }
 351 #endif
 352
 353          Xfree(data);
 354       }
 355    }
 356
 357    UnlockDisplay(dpy);
 358    SyncHandle();
 359
 360    return 0;
 361 }
 362
 363 /**
 364  * Create a non-pbuffer GLX drawable.
 365  *
 366  * \todo
 367  * This function needs to be modified to work with direct-rendering drivers.
 368  */
 369 static GLXDrawable
 370 CreateDrawable(Display *dpy, struct glx_config *config,
 371                Drawable drawable, const int *attrib_list, CARD8 glxCode)
 372 {
 373    xGLXCreateWindowReq *req;
 374    CARD32 *data;
 375    unsigned int i;
 376    CARD8 opcode;
 377
 378    i = 0;
 379    if (attrib_list) {
 380       while (attrib_list[i * 2] != None)
 381          i++;
 382    }
 383
 384    opcode = __glXSetupForCommand(dpy);
 385    if (!opcode)
 386       return None;
 387
 388    LockDisplay(dpy);
 389    GetReqExtra(GLXCreateWindow, 8 * i, req);
 390    data = (CARD32 *) (req + 1);
 391
 392    req->reqType = opcode;
 393    req->glxCode = glxCode;
 394    req->screen = config->screen;
 395    req->fbconfig = config->fbconfigID;
 396    req->window = drawable;
 397    req->glxwindow = XAllocID(dpy);
 398    req->numAttribs = i;
 399
 400    if (attrib_list)
 401       memcpy(data, attrib_list, 8 * i);
 402
 403    UnlockDisplay(dpy);
 404    SyncHandle();
 405
 406    CreateDRIDrawable(dpy, config, drawable, req->glxwindow, attrib_list, i);
 407
 408    return req->glxwindow;
 409 }
 410
 411
 412 /**
 413  * Destroy a non-pbuffer GLX drawable.
 414  */
 415 static void
 416 DestroyDrawable(Display * dpy, GLXDrawable drawable, CARD32 glxCode)
 417 {
 418    xGLXDestroyPbufferReq *req;
 419    CARD8 opcode;
 420
 421    if ((dpy == NULL) || (drawable == 0)) {
 422       return;
 423    }
 424
 425
 426    opcode = __glXSetupForCommand(dpy);
 427    if (!opcode)
 428       return;
 429
 430    LockDisplay(dpy);
 431
 432    GetReqExtra(GLXDestroyPbuffer, 4, req);
 433    req->reqType = opcode;
 434    req->glxCode = glxCode;
 435    req->pbuffer = (GLXPbuffer) drawable;
 436
 437    UnlockDisplay(dpy);
 438    SyncHandle();
 439
 440    DestroyDRIDrawable(dpy, drawable, GL_FALSE);
 441
 442    return;
 443 }
 444
 445
 446 /**
 447  * Create a pbuffer.
 448  *
 449  * This function is used to implement \c glXCreatePbuffer and
 450  * \c glXCreateGLXPbufferSGIX.
 451  *
 452  * \note
 453  * This function dynamically determines whether to use the SGIX_pbuffer
 454  * version of the protocol or the GLX 1.3 version of the protocol.
 455  *
 456  * \todo
 457  * This function needs to be modified to work with direct-rendering drivers.
 458  */
 459 static GLXDrawable
 460 CreatePbuffer(Display * dpy, struct glx_config *config,
 461               unsigned int width, unsigned int height,
 462               const int *attrib_list, GLboolean size_in_attribs)
 463 {
 464    struct glx_display *priv = __glXInitialize(dpy);
 465    GLXDrawable id = 0;
 466    CARD32 *data;
 467    CARD8 opcode;
 468    unsigned int i;
 469    Pixmap pixmap;
 470
 471    i = 0;
 472    if (attrib_list) {
 473       while (attrib_list[i * 2])
 474          i++;
 475    }
 476
 477    opcode = __glXSetupForCommand(dpy);
 478    if (!opcode)
 479       return None;
 480
 481    LockDisplay(dpy);
 482    id = XAllocID(dpy);
 483
 484    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 485       xGLXCreatePbufferReq *req;
 486       unsigned int extra = (size_in_attribs) ? 0 : 2;
 487
 488       GetReqExtra(GLXCreatePbuffer, (8 * (i + extra)), req);
 489       data = (CARD32 *) (req + 1);
 490
 491       req->reqType = opcode;
 492       req->glxCode = X_GLXCreatePbuffer;
 493       req->screen = config->screen;
 494       req->fbconfig = config->fbconfigID;
 495       req->pbuffer = id;
 496       req->numAttribs = i + extra;
 497
 498       if (!size_in_attribs) {
 499          data[(2 * i) + 0] = GLX_PBUFFER_WIDTH;
 500          data[(2 * i) + 1] = width;
 501          data[(2 * i) + 2] = GLX_PBUFFER_HEIGHT;
 502          data[(2 * i) + 3] = height;
 503          data += 4;
 504       }
 505    }
 506    else {
 507       xGLXVendorPrivateReq *vpreq;
 508
 509       GetReqExtra(GLXVendorPrivate, 20 + (8 * i), vpreq);
 510       data = (CARD32 *) (vpreq + 1);
 511
 512       vpreq->reqType = opcode;
 513       vpreq->glxCode = X_GLXVendorPrivate;
 514       vpreq->vendorCode = X_GLXvop_CreateGLXPbufferSGIX;
 515
 516       data[0] = config->screen;
 517       data[1] = config->fbconfigID;
 518       data[2] = id;
 519       data[3] = width;
 520       data[4] = height;
 521       data += 5;
 522    }
 523
 524    (void) memcpy(data, attrib_list, sizeof(CARD32) * 2 * i);
 525
 526    UnlockDisplay(dpy);
 527    SyncHandle();
 528
 529    pixmap = XCreatePixmap(dpy, RootWindow(dpy, config->screen),
 530                           width, height, config->rgbBits);
 531
 532    CreateDRIDrawable(dpy, config, pixmap, id, attrib_list, i);
 533
 534    return id;
 535 }
 536
 537 /**
 538  * Destroy a pbuffer.
 539  *
 540  * This function is used to implement \c glXDestroyPbuffer and
 541  * \c glXDestroyGLXPbufferSGIX.
 542  *
 543  * \note
 544  * This function dynamically determines whether to use the SGIX_pbuffer
 545  * version of the protocol or the GLX 1.3 version of the protocol.
 546  */
 547 static void
 548 DestroyPbuffer(Display * dpy, GLXDrawable drawable)
 549 {
 550    struct glx_display *priv = __glXInitialize(dpy);
 551    CARD8 opcode;
 552
 553    if ((dpy == NULL) || (drawable == 0)) {
 554       return;
 555    }
 556
 557    opcode = __glXSetupForCommand(dpy);
 558    if (!opcode)
 559       return;
 560
 561    LockDisplay(dpy);
 562
 563    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 564       xGLXDestroyPbufferReq *req;
 565
 566       GetReq(GLXDestroyPbuffer, req);
 567       req->reqType = opcode;
 568       req->glxCode = X_GLXDestroyPbuffer;
 569       req->pbuffer = (GLXPbuffer) drawable;
 570    }
 571    else {
 572       xGLXVendorPrivateWithReplyReq *vpreq;
 573       CARD32 *data;
 574
 575       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 576       data = (CARD32 *) (vpreq + 1);
 577
 578       data[0] = (CARD32) drawable;
 579
 580       vpreq->reqType = opcode;
 581       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 582       vpreq->vendorCode = X_GLXvop_DestroyGLXPbufferSGIX;
 583    }
 584
 585    UnlockDisplay(dpy);
 586    SyncHandle();
 587
 588    DestroyDRIDrawable(dpy, drawable, GL_TRUE);
 589
 590    return;
 591 }
 592
 593 /**
 594  * Create a new pbuffer.
 595  */
 596 _X_EXPORT GLXPbufferSGIX
 597 glXCreateGLXPbufferSGIX(Display * dpy, GLXFBConfigSGIX config,
 598                         unsigned int width, unsigned int height,
 599                         int *attrib_list)
 600 {
 601    return (GLXPbufferSGIX) CreatePbuffer(dpy, (struct glx_config *) config,
 602                                          width, height,
 603                                          attrib_list, GL_FALSE);
 604 }
 605
 606 #endif /* GLX_USE_APPLEGL */
 607
 608 /**
 609  * Create a new pbuffer.
 610  */
 611 _X_EXPORT GLXPbuffer
 612 glXCreatePbuffer(Display * dpy, GLXFBConfig config, const int *attrib_list)
 613 {
 614    int i, width, height;
 615 #ifdef GLX_USE_APPLEGL
 616    GLXPbuffer result;
 617    int errorcode;
 618 #endif
 619
 620    width = 0;
 621    height = 0;
 622
 623    WARN_ONCE_GLX_1_3(dpy, __func__);
 624
 625 #ifdef GLX_USE_APPLEGL
 626    for (i = 0; attrib_list[i]; ++i) {
 627       switch (attrib_list[i]) {
 628       case GLX_PBUFFER_WIDTH:
 629          width = attrib_list[i + 1];
 630          ++i;
 631          break;
 632
 633       case GLX_PBUFFER_HEIGHT:
 634          height = attrib_list[i + 1];
 635          ++i;
 636          break;
 637
 638       case GLX_LARGEST_PBUFFER:
 639          /* This is a hint we should probably handle, but how? */
 640          ++i;
 641          break;
 642
 643       case GLX_PRESERVED_CONTENTS:
 644          /* The contents are always preserved with AppleSGLX with CGL. */
 645          ++i;
 646          break;
 647
 648       default:
 649          return None;
 650       }
 651    }
 652
 653    if (apple_glx_pbuffer_create(dpy, config, width, height, &errorcode,
 654                                 &result)) {
 655       /*
 656        * apple_glx_pbuffer_create only sets the errorcode to core X11
 657        * errors.
 658        */
 659       __glXSendError(dpy, errorcode, 0, X_GLXCreatePbuffer, true);
 660
 661       return None;
 662    }
 663
 664    return result;
 665 #else
 666    for (i = 0; attrib_list[i * 2]; i++) {
 667       switch (attrib_list[i * 2]) {
 668       case GLX_PBUFFER_WIDTH:
 669          width = attrib_list[i * 2 + 1];
 670          break;
 671       case GLX_PBUFFER_HEIGHT:
 672          height = attrib_list[i * 2 + 1];
 673          break;
 674       }
 675    }
 676
 677    return (GLXPbuffer) CreatePbuffer(dpy, (struct glx_config *) config,
 678                                      width, height, attrib_list, GL_TRUE);
 679 #endif
 680 }
 681
 682
 683 /**
 684  * Destroy an existing pbuffer.
 685  */
 686 _X_EXPORT void
 687 glXDestroyPbuffer(Display * dpy, GLXPbuffer pbuf)
 688 {
 689 #ifdef GLX_USE_APPLEGL
 690    if (apple_glx_pbuffer_destroy(dpy, pbuf)) {
 691       __glXSendError(dpy, GLXBadPbuffer, pbuf, X_GLXDestroyPbuffer, false);
 692    }
 693 #else
 694    DestroyPbuffer(dpy, pbuf);
 695 #endif
 696 }
 697
 698
 699 /**
 700  * Query an attribute of a drawable.
 701  */
 702 _X_EXPORT void
 703 glXQueryDrawable(Display * dpy, GLXDrawable drawable,
 704                  int attribute, unsigned int *value)
 705 {
 706    WARN_ONCE_GLX_1_3(dpy, __func__);
 707 #ifdef GLX_USE_APPLEGL
 708    Window root;
 709    int x, y;
 710    unsigned int width, height, bd, depth;
 711
 712    if (apple_glx_pixmap_query(drawable, attribute, value))
 713       return;                   /*done */
 714
 715    if (apple_glx_pbuffer_query(drawable, attribute, value))
 716       return;                   /*done */
 717
 718    /*
 719     * The OpenGL spec states that we should report GLXBadDrawable if
 720     * the drawable is invalid, however doing so would require that we
 721     * use XSetErrorHandler(), which is known to not be thread safe.
 722     * If we use a round-trip call to validate the drawable, there could
 723     * be a race, so instead we just opt in favor of letting the
 724     * XGetGeometry request fail with a GetGeometry request X error
 725     * rather than GLXBadDrawable, in what is hoped to be a rare
 726     * case of an invalid drawable.  In practice most and possibly all
 727     * X11 apps using GLX shouldn't notice a difference.
 728     */
 729    if (XGetGeometry
 730        (dpy, drawable, &root, &x, &y, &width, &height, &bd, &depth)) {
 731       switch (attribute) {
 732       case GLX_WIDTH:
 733          *value = width;
 734          break;
 735
 736       case GLX_HEIGHT:
 737          *value = height;
 738          break;
 739       }
 740    }
 741 #else
 742    GetDrawableAttribute(dpy, drawable, attribute, value);
 743 #endif
 744 }
 745
 746
 747 #ifndef GLX_USE_APPLEGL
 748 /**
 749  * Query an attribute of a pbuffer.
 750  */
 751 _X_EXPORT int
 752 glXQueryGLXPbufferSGIX(Display * dpy, GLXPbufferSGIX drawable,
 753                        int attribute, unsigned int *value)
 754 {
 755    return GetDrawableAttribute(dpy, drawable, attribute, value);
 756 }
 757 #endif
 758
 759 /**
 760  * Select the event mask for a drawable.
 761  */
 762 _X_EXPORT void
 763 glXSelectEvent(Display * dpy, GLXDrawable drawable, unsigned long mask)
 764 {
 765 #ifdef GLX_USE_APPLEGL
 766    XWindowAttributes xwattr;
 767
 768    if (apple_glx_pbuffer_set_event_mask(drawable, mask))
 769       return;                   /*done */
 770
 771    /*
 772     * The spec allows a window, but currently there are no valid
 773     * events for a window, so do nothing.
 774     */
 775    if (XGetWindowAttributes(dpy, drawable, &xwattr))
 776       return;                   /*done */
 777    /* The drawable seems to be invalid.  Report an error. */
 778
 779    __glXSendError(dpy, GLXBadDrawable, drawable,
 780                   X_GLXChangeDrawableAttributes, false);
 781 #else
 782    CARD32 attribs[2];
 783
 784    attribs[0] = (CARD32) GLX_EVENT_MASK;
 785    attribs[1] = (CARD32) mask;
 786
 787    ChangeDrawableAttribute(dpy, drawable, attribs, 1);
 788 #endif
 789 }
 790
 791
 792 /**
 793  * Get the selected event mask for a drawable.
 794  */
 795 _X_EXPORT void
 796 glXGetSelectedEvent(Display * dpy, GLXDrawable drawable, unsigned long *mask)
 797 {
 798 #ifdef GLX_USE_APPLEGL
 799    XWindowAttributes xwattr;
 800
 801    if (apple_glx_pbuffer_get_event_mask(drawable, mask))
 802       return;                   /*done */
 803
 804    /*
 805     * The spec allows a window, but currently there are no valid
 806     * events for a window, so do nothing, but set the mask to 0.
 807     */
 808    if (XGetWindowAttributes(dpy, drawable, &xwattr)) {
 809       /* The window is valid, so set the mask to 0. */
 810       *mask = 0;
 811       return;                   /*done */
 812    }
 813    /* The drawable seems to be invalid.  Report an error. */
 814
 815    __glXSendError(dpy, GLXBadDrawable, drawable, X_GLXGetDrawableAttributes,
 816                   true);
 817 #else
 818    unsigned int value;
 819
 820
 821    /* The non-sense with value is required because on LP64 platforms
 822     * sizeof(unsigned int) != sizeof(unsigned long).  On little-endian
 823     * we could just type-cast the pointer, but why?
 824     */
 825
 826    GetDrawableAttribute(dpy, drawable, GLX_EVENT_MASK_SGIX, &value);
 827    *mask = value;
 828 #endif
 829 }
 830
 831
 832 _X_EXPORT GLXPixmap
 833 glXCreatePixmap(Display * dpy, GLXFBConfig config, Pixmap pixmap,
 834                 const int *attrib_list)
 835 {
 836    WARN_ONCE_GLX_1_3(dpy, __func__);
 837
 838 #ifdef GLX_USE_APPLEGL
 839    const struct glx_config *modes = (const __GLcontextModes *) config;
 840
 841    if (apple_glx_pixmap_create(dpy, modes->screen, pixmap, modes))
 842       return None;
 843
 844    return pixmap;
 845 #else
 846    return CreateDrawable(dpy, (struct glx_config *) config,
 847                          (Drawable) pixmap, attrib_list, X_GLXCreatePixmap);
 848 #endif
 849 }
 850
 851
 852 _X_EXPORT GLXWindow
 853 glXCreateWindow(Display * dpy, GLXFBConfig config, Window win,
 854                 const int *attrib_list)
 855 {
 856    WARN_ONCE_GLX_1_3(dpy, __func__);
 857 #ifdef GLX_USE_APPLEGL
 858    XWindowAttributes xwattr;
 859    XVisualInfo *visinfo;
 860
 861    (void) attrib_list;          /*unused according to GLX 1.4 */
 862
 863    XGetWindowAttributes(dpy, win, &xwattr);
 864
 865    visinfo = glXGetVisualFromFBConfig(dpy, config);
 866
 867    if (NULL == visinfo) {
 868       __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateWindow, false);
 869       return None;
 870    }
 871
 872    if (visinfo->visualid != XVisualIDFromVisual(xwattr.visual)) {
 873       __glXSendError(dpy, BadMatch, 0, X_GLXCreateWindow, true);
 874       return None;
 875    }
 876
 877    XFree(visinfo);
 878
 879    return win;
 880 #else
 881    return CreateDrawable(dpy, (struct glx_config *) config,
 882                          (Drawable) win, attrib_list, X_GLXCreateWindow);
 883 #endif
 884 }
 885
 886
 887 _X_EXPORT void
 888 glXDestroyPixmap(Display * dpy, GLXPixmap pixmap)
 889 {
 890    WARN_ONCE_GLX_1_3(dpy, __func__);
 891 #ifdef GLX_USE_APPLEGL
 892    if (apple_glx_pixmap_destroy(dpy, pixmap))
 893       __glXSendError(dpy, GLXBadPixmap, pixmap, X_GLXDestroyPixmap, false);
 894 #else
 895    DestroyDrawable(dpy, (GLXDrawable) pixmap, X_GLXDestroyPixmap);
 896 #endif
 897 }
 898
 899
 900 _X_EXPORT void
 901 glXDestroyWindow(Display * dpy, GLXWindow win)
 902 {
 903    WARN_ONCE_GLX_1_3(dpy, __func__);
 904 #ifndef GLX_USE_APPLEGL
 905    DestroyDrawable(dpy, (GLXDrawable) win, X_GLXDestroyWindow);
 906 #endif
 907 }
 908
 909 #ifndef GLX_USE_APPLEGL
 910 _X_EXPORT
 911 GLX_ALIAS_VOID(glXDestroyGLXPbufferSGIX,
 912                (Display * dpy, GLXPbufferSGIX pbuf),
 913                (dpy, pbuf), glXDestroyPbuffer)
 914
 915 _X_EXPORT
 916 GLX_ALIAS_VOID(glXSelectEventSGIX,
 917                (Display * dpy, GLXDrawable drawable,
 918                 unsigned long mask), (dpy, drawable, mask), glXSelectEvent)
 919
 920 _X_EXPORT
 921 GLX_ALIAS_VOID(glXGetSelectedEventSGIX,
 922                (Display * dpy, GLXDrawable drawable,
 923                 unsigned long *mask), (dpy, drawable, mask),
 924                glXGetSelectedEvent)
 925 #endif