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 static void
  82 ChangeDrawableAttribute(Display * dpy, GLXDrawable drawable,
  83                         const CARD32 * attribs, size_t num_attribs)
  84 {
  85    struct glx_display *priv = __glXInitialize(dpy);
  86 #ifdef GLX_DIRECT_RENDERING
  87    __GLXDRIdrawable *pdraw;
  88 #endif
  89    CARD32 *output;
  90    CARD8 opcode;
  91    int i;
  92
  93    if ((dpy == NULL) || (drawable == 0)) {
  94       return;
  95    }
  96
  97    opcode = __glXSetupForCommand(dpy);
  98    if (!opcode)
  99       return;
 100
 101    LockDisplay(dpy);
 102
 103    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 104       xGLXChangeDrawableAttributesReq *req;
 105
 106       GetReqExtra(GLXChangeDrawableAttributes, 8 * num_attribs, req);
 107       output = (CARD32 *) (req + 1);
 108
 109       req->reqType = opcode;
 110       req->glxCode = X_GLXChangeDrawableAttributes;
 111       req->drawable = drawable;
 112       req->numAttribs = (CARD32) num_attribs;
 113    }
 114    else {
 115       xGLXVendorPrivateWithReplyReq *vpreq;
 116
 117       GetReqExtra(GLXVendorPrivateWithReply, 8 + (8 * num_attribs), vpreq);
 118       output = (CARD32 *) (vpreq + 1);
 119
 120       vpreq->reqType = opcode;
 121       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 122       vpreq->vendorCode = X_GLXvop_ChangeDrawableAttributesSGIX;
 123
 124       output[0] = (CARD32) drawable;
 125       output[1] = num_attribs;
 126       output += 2;
 127    }
 128
 129    (void) memcpy(output, attribs, sizeof(CARD32) * 2 * num_attribs);
 130
 131    UnlockDisplay(dpy);
 132    SyncHandle();
 133
 134 #ifdef GLX_DIRECT_RENDERING
 135    pdraw = GetGLXDRIDrawable(dpy, drawable);
 136
 137    if (!pdraw)
 138       return;
 139
 140    for (i = 0; i < num_attribs; i++) {
 141       switch(attribs[i * 2]) {
 142       case GLX_EVENT_MASK:
 143          /* Keep a local copy for masking out DRI2 proto events as needed */
 144          pdraw->eventMask = attribs[i * 2 + 1];
 145          break;
 146       }
 147    }
 148 #endif
 149
 150    return;
 151 }
 152
 153
 154 #ifdef GLX_DIRECT_RENDERING
 155 static GLenum
 156 determineTextureTarget(const int *attribs, int numAttribs)
 157 {
 158    GLenum target = 0;
 159    int i;
 160
 161    for (i = 0; i < numAttribs; i++) {
 162       if (attribs[2 * i] == GLX_TEXTURE_TARGET_EXT) {
 163          switch (attribs[2 * i + 1]) {
 164          case GLX_TEXTURE_2D_EXT:
 165             target = GL_TEXTURE_2D;
 166             break;
 167          case GLX_TEXTURE_RECTANGLE_EXT:
 168             target = GL_TEXTURE_RECTANGLE_ARB;
 169             break;
 170          }
 171       }
 172    }
 173
 174    return target;
 175 }
 176
 177 static GLenum
 178 determineTextureFormat(const int *attribs, int numAttribs)
 179 {
 180    int i;
 181
 182    for (i = 0; i < numAttribs; i++) {
 183       if (attribs[2 * i] == GLX_TEXTURE_FORMAT_EXT)
 184          return attribs[2 * i + 1];
 185    }
 186
 187    return 0;
 188 }
 189
 190 static GLboolean
 191 CreateDRIDrawable(Display *dpy, struct glx_config *config,
 192                   XID drawable, XID glxdrawable,
 193                   const int *attrib_list, size_t num_attribs)
 194 {
 195    struct glx_display *const priv = __glXInitialize(dpy);
 196    __GLXDRIdrawable *pdraw;
 197    struct glx_screen *psc;
 198
 199    psc = priv->screens[config->screen];
 200    if (psc->driScreen == NULL)
 201       return GL_TRUE;
 202
 203    pdraw = psc->driScreen->createDrawable(psc, drawable,
 204                                           glxdrawable, config);
 205    if (pdraw == NULL) {
 206       fprintf(stderr, "failed to create drawable\n");
 207       return GL_FALSE;
 208    }
 209
 210    if (__glxHashInsert(priv->drawHash, glxdrawable, pdraw)) {
 211       (*pdraw->destroyDrawable) (pdraw);
 212       return GL_FALSE;
 213    }
 214
 215    pdraw->textureTarget = determineTextureTarget(attrib_list, num_attribs);
 216    pdraw->textureFormat = determineTextureFormat(attrib_list, num_attribs);
 217
 218    return GL_TRUE;
 219 }
 220
 221 static void
 222 DestroyDRIDrawable(Display *dpy, GLXDrawable drawable, int destroy_xdrawable)
 223 {
 224    struct glx_display *const priv = __glXInitialize(dpy);
 225    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
 226    XID xid;
 227
 228    if (pdraw != NULL) {
 229       xid = pdraw->xDrawable;
 230       (*pdraw->destroyDrawable) (pdraw);
 231       __glxHashDelete(priv->drawHash, drawable);
 232       if (destroy_xdrawable)
 233          XFreePixmap(priv->dpy, xid);
 234    }
 235 }
 236
 237 #else
 238
 239 static GLboolean
 240 CreateDRIDrawable(Display *dpy, const struct glx_config * fbconfig,
 241                   XID drawable, XID glxdrawable,
 242                   const int *attrib_list, size_t num_attribs)
 243 {
 244     return GL_FALSE;
 245 }
 246
 247 static void
 248 DestroyDRIDrawable(Display *dpy, GLXDrawable drawable, int destroy_xdrawable)
 249 {
 250 }
 251
 252 #endif
 253
 254 /**
 255  * Get a drawable's attribute.
 256  *
 257  * This function is used to implement \c glXGetSelectedEvent and
 258  * \c glXGetSelectedEventSGIX.
 259  *
 260  * \note
 261  * This function dynamically determines whether to use the SGIX_pbuffer
 262  * version of the protocol or the GLX 1.3 version of the protocol.
 263  *
 264  * \todo
 265  * The number of attributes returned is likely to be small, probably less than
 266  * 10.  Given that, this routine should try to use an array on the stack to
 267  * capture the reply rather than always calling Xmalloc.
 268  */
 269 static int
 270 GetDrawableAttribute(Display * dpy, GLXDrawable drawable,
 271                      int attribute, unsigned int *value)
 272 {
 273    struct glx_display *priv;
 274    xGLXGetDrawableAttributesReply reply;
 275    CARD32 *data;
 276    CARD8 opcode;
 277    unsigned int length;
 278    unsigned int i;
 279    unsigned int num_attributes;
 280    GLboolean use_glx_1_3;
 281
 282    if ((dpy == NULL) || (drawable == 0)) {
 283       return 0;
 284    }
 285
 286    priv = __glXInitialize(dpy);
 287    use_glx_1_3 = ((priv->majorVersion > 1) || (priv->minorVersion >= 3));
 288
 289    *value = 0;
 290
 291
 292    opcode = __glXSetupForCommand(dpy);
 293    if (!opcode)
 294       return 0;
 295
 296    LockDisplay(dpy);
 297
 298    if (use_glx_1_3) {
 299       xGLXGetDrawableAttributesReq *req;
 300
 301       GetReq(GLXGetDrawableAttributes, req);
 302       req->reqType = opcode;
 303       req->glxCode = X_GLXGetDrawableAttributes;
 304       req->drawable = drawable;
 305    }
 306    else {
 307       xGLXVendorPrivateWithReplyReq *vpreq;
 308
 309       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 310       data = (CARD32 *) (vpreq + 1);
 311       data[0] = (CARD32) drawable;
 312
 313       vpreq->reqType = opcode;
 314       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 315       vpreq->vendorCode = X_GLXvop_GetDrawableAttributesSGIX;
 316    }
 317
 318    _XReply(dpy, (xReply *) & reply, 0, False);
 319
 320    if (reply.type == X_Error) {
 321       UnlockDisplay(dpy);
 322       SyncHandle();
 323       return 0;
 324    }
 325
 326    length = reply.length;
 327    if (length) {
 328       num_attributes = (use_glx_1_3) ? reply.numAttribs : length / 2;
 329       data = (CARD32 *) Xmalloc(length * sizeof(CARD32));
 330       if (data == NULL) {
 331          /* Throw data on the floor */
 332          _XEatData(dpy, length);
 333       }
 334       else {
 335          _XRead(dpy, (char *) data, length * sizeof(CARD32));
 336
 337          /* Search the set of returned attributes for the attribute requested by
 338           * the caller.
 339           */
 340          for (i = 0; i < num_attributes; i++) {
 341             if (data[i * 2] == attribute) {
 342                *value = data[(i * 2) + 1];
 343                break;
 344             }
 345          }
 346
 347 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 348          {
 349             __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
 350
 351             if (pdraw != NULL && !pdraw->textureTarget)
 352                pdraw->textureTarget =
 353                   determineTextureTarget((const int *) data, num_attributes);
 354             if (pdraw != NULL && !pdraw->textureFormat)
 355                pdraw->textureFormat =
 356                   determineTextureFormat((const int *) data, num_attributes);
 357          }
 358 #endif
 359
 360          Xfree(data);
 361       }
 362    }
 363
 364    UnlockDisplay(dpy);
 365    SyncHandle();
 366
 367    return 0;
 368 }
 369
 370 static void
 371 protocolDestroyDrawable(Display *dpy, GLXDrawable drawable, CARD32 glxCode)
 372 {
 373    xGLXDestroyPbufferReq *req;
 374    CARD8 opcode;
 375
 376    opcode = __glXSetupForCommand(dpy);
 377    if (!opcode)
 378       return;
 379
 380    LockDisplay(dpy);
 381
 382    GetReq(GLXDestroyPbuffer, req);
 383    req->reqType = opcode;
 384    req->glxCode = glxCode;
 385    req->pbuffer = (GLXPbuffer) drawable;
 386
 387    UnlockDisplay(dpy);
 388    SyncHandle();
 389 }
 390
 391 /**
 392  * Create a non-pbuffer GLX drawable.
 393  */
 394 static GLXDrawable
 395 CreateDrawable(Display *dpy, struct glx_config *config,
 396                Drawable drawable, const int *attrib_list, CARD8 glxCode)
 397 {
 398    xGLXCreateWindowReq *req;
 399    struct glx_drawable *glxDraw;
 400    CARD32 *data;
 401    unsigned int i;
 402    CARD8 opcode;
 403    GLXDrawable xid;
 404
 405    i = 0;
 406    if (attrib_list) {
 407       while (attrib_list[i * 2] != None)
 408          i++;
 409    }
 410
 411    opcode = __glXSetupForCommand(dpy);
 412    if (!opcode)
 413       return None;
 414
 415    glxDraw = Xmalloc(sizeof(*glxDraw));
 416    if (!glxDraw)
 417       return None;
 418
 419    LockDisplay(dpy);
 420    GetReqExtra(GLXCreateWindow, 8 * i, req);
 421    data = (CARD32 *) (req + 1);
 422
 423    req->reqType = opcode;
 424    req->glxCode = glxCode;
 425    req->screen = config->screen;
 426    req->fbconfig = config->fbconfigID;
 427    req->window = drawable;
 428    req->glxwindow = xid = XAllocID(dpy);
 429    req->numAttribs = i;
 430
 431    if (attrib_list)
 432       memcpy(data, attrib_list, 8 * i);
 433
 434    UnlockDisplay(dpy);
 435    SyncHandle();
 436
 437    if (InitGLXDrawable(dpy, glxDraw, drawable, xid)) {
 438       free(glxDraw);
 439       return None;
 440    }
 441
 442    if (!CreateDRIDrawable(dpy, config, drawable, xid, attrib_list, i)) {
 443       if (glxCode == X_GLXCreatePixmap)
 444          glxCode = X_GLXDestroyPixmap;
 445       else
 446          glxCode = X_GLXDestroyWindow;
 447       protocolDestroyDrawable(dpy, xid, glxCode);
 448       xid = None;
 449    }
 450
 451    return xid;
 452 }
 453
 454
 455 /**
 456  * Destroy a non-pbuffer GLX drawable.
 457  */
 458 static void
 459 DestroyDrawable(Display * dpy, GLXDrawable drawable, CARD32 glxCode)
 460 {
 461    if ((dpy == NULL) || (drawable == 0)) {
 462       return;
 463    }
 464
 465    protocolDestroyDrawable(dpy, drawable, glxCode);
 466
 467    DestroyGLXDrawable(dpy, drawable);
 468    DestroyDRIDrawable(dpy, drawable, GL_FALSE);
 469
 470    return;
 471 }
 472
 473
 474 /**
 475  * Create a pbuffer.
 476  *
 477  * This function is used to implement \c glXCreatePbuffer and
 478  * \c glXCreateGLXPbufferSGIX.
 479  *
 480  * \note
 481  * This function dynamically determines whether to use the SGIX_pbuffer
 482  * version of the protocol or the GLX 1.3 version of the protocol.
 483  */
 484 static GLXDrawable
 485 CreatePbuffer(Display * dpy, struct glx_config *config,
 486               unsigned int width, unsigned int height,
 487               const int *attrib_list, GLboolean size_in_attribs)
 488 {
 489    struct glx_display *priv = __glXInitialize(dpy);
 490    GLXDrawable id = 0;
 491    CARD32 *data;
 492    CARD8 opcode;
 493    unsigned int i;
 494    Pixmap pixmap;
 495    GLboolean glx_1_3 = GL_FALSE;
 496
 497    i = 0;
 498    if (attrib_list) {
 499       while (attrib_list[i * 2])
 500          i++;
 501    }
 502
 503    opcode = __glXSetupForCommand(dpy);
 504    if (!opcode)
 505       return None;
 506
 507    LockDisplay(dpy);
 508    id = XAllocID(dpy);
 509
 510    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 511       xGLXCreatePbufferReq *req;
 512       unsigned int extra = (size_in_attribs) ? 0 : 2;
 513
 514       glx_1_3 = GL_TRUE;
 515
 516       GetReqExtra(GLXCreatePbuffer, (8 * (i + extra)), req);
 517       data = (CARD32 *) (req + 1);
 518
 519       req->reqType = opcode;
 520       req->glxCode = X_GLXCreatePbuffer;
 521       req->screen = config->screen;
 522       req->fbconfig = config->fbconfigID;
 523       req->pbuffer = id;
 524       req->numAttribs = i + extra;
 525
 526       if (!size_in_attribs) {
 527          data[(2 * i) + 0] = GLX_PBUFFER_WIDTH;
 528          data[(2 * i) + 1] = width;
 529          data[(2 * i) + 2] = GLX_PBUFFER_HEIGHT;
 530          data[(2 * i) + 3] = height;
 531          data += 4;
 532       }
 533    }
 534    else {
 535       xGLXVendorPrivateReq *vpreq;
 536
 537       GetReqExtra(GLXVendorPrivate, 20 + (8 * i), vpreq);
 538       data = (CARD32 *) (vpreq + 1);
 539
 540       vpreq->reqType = opcode;
 541       vpreq->glxCode = X_GLXVendorPrivate;
 542       vpreq->vendorCode = X_GLXvop_CreateGLXPbufferSGIX;
 543
 544       data[0] = config->screen;
 545       data[1] = config->fbconfigID;
 546       data[2] = id;
 547       data[3] = width;
 548       data[4] = height;
 549       data += 5;
 550    }
 551
 552    (void) memcpy(data, attrib_list, sizeof(CARD32) * 2 * i);
 553
 554    UnlockDisplay(dpy);
 555    SyncHandle();
 556
 557    pixmap = XCreatePixmap(dpy, RootWindow(dpy, config->screen),
 558                           width, height, config->rgbBits);
 559
 560    if (!CreateDRIDrawable(dpy, config, pixmap, id, attrib_list, i)) {
 561       CARD32 o = glx_1_3 ? X_GLXDestroyPbuffer : X_GLXvop_DestroyGLXPbufferSGIX;
 562       XFreePixmap(dpy, pixmap);
 563       protocolDestroyDrawable(dpy, id, o);
 564       id = None;
 565    }
 566
 567    return id;
 568 }
 569
 570 /**
 571  * Destroy a pbuffer.
 572  *
 573  * This function is used to implement \c glXDestroyPbuffer and
 574  * \c glXDestroyGLXPbufferSGIX.
 575  *
 576  * \note
 577  * This function dynamically determines whether to use the SGIX_pbuffer
 578  * version of the protocol or the GLX 1.3 version of the protocol.
 579  */
 580 static void
 581 DestroyPbuffer(Display * dpy, GLXDrawable drawable)
 582 {
 583    struct glx_display *priv = __glXInitialize(dpy);
 584    CARD8 opcode;
 585
 586    if ((dpy == NULL) || (drawable == 0)) {
 587       return;
 588    }
 589
 590    opcode = __glXSetupForCommand(dpy);
 591    if (!opcode)
 592       return;
 593
 594    LockDisplay(dpy);
 595
 596    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 597       xGLXDestroyPbufferReq *req;
 598
 599       GetReq(GLXDestroyPbuffer, req);
 600       req->reqType = opcode;
 601       req->glxCode = X_GLXDestroyPbuffer;
 602       req->pbuffer = (GLXPbuffer) drawable;
 603    }
 604    else {
 605       xGLXVendorPrivateWithReplyReq *vpreq;
 606       CARD32 *data;
 607
 608       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 609       data = (CARD32 *) (vpreq + 1);
 610
 611       data[0] = (CARD32) drawable;
 612
 613       vpreq->reqType = opcode;
 614       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 615       vpreq->vendorCode = X_GLXvop_DestroyGLXPbufferSGIX;
 616    }
 617
 618    UnlockDisplay(dpy);
 619    SyncHandle();
 620
 621    DestroyDRIDrawable(dpy, drawable, GL_TRUE);
 622
 623    return;
 624 }
 625
 626 /**
 627  * Create a new pbuffer.
 628  */
 629 _X_EXPORT GLXPbufferSGIX
 630 glXCreateGLXPbufferSGIX(Display * dpy, GLXFBConfigSGIX config,
 631                         unsigned int width, unsigned int height,
 632                         int *attrib_list)
 633 {
 634    return (GLXPbufferSGIX) CreatePbuffer(dpy, (struct glx_config *) config,
 635                                          width, height,
 636                                          attrib_list, GL_FALSE);
 637 }
 638
 639 #endif /* GLX_USE_APPLEGL */
 640
 641 /**
 642  * Create a new pbuffer.
 643  */
 644 _X_EXPORT GLXPbuffer
 645 glXCreatePbuffer(Display * dpy, GLXFBConfig config, const int *attrib_list)
 646 {
 647    int i, width, height;
 648 #ifdef GLX_USE_APPLEGL
 649    GLXPbuffer result;
 650    int errorcode;
 651 #endif
 652
 653    width = 0;
 654    height = 0;
 655
 656    WARN_ONCE_GLX_1_3(dpy, __func__);
 657
 658 #ifdef GLX_USE_APPLEGL
 659    for (i = 0; attrib_list[i]; ++i) {
 660       switch (attrib_list[i]) {
 661       case GLX_PBUFFER_WIDTH:
 662          width = attrib_list[i + 1];
 663          ++i;
 664          break;
 665
 666       case GLX_PBUFFER_HEIGHT:
 667          height = attrib_list[i + 1];
 668          ++i;
 669          break;
 670
 671       case GLX_LARGEST_PBUFFER:
 672          /* This is a hint we should probably handle, but how? */
 673          ++i;
 674          break;
 675
 676       case GLX_PRESERVED_CONTENTS:
 677          /* The contents are always preserved with AppleSGLX with CGL. */
 678          ++i;
 679          break;
 680
 681       default:
 682          return None;
 683       }
 684    }
 685
 686    if (apple_glx_pbuffer_create(dpy, config, width, height, &errorcode,
 687                                 &result)) {
 688       /*
 689        * apple_glx_pbuffer_create only sets the errorcode to core X11
 690        * errors.
 691        */
 692       __glXSendError(dpy, errorcode, 0, X_GLXCreatePbuffer, true);
 693
 694       return None;
 695    }
 696
 697    return result;
 698 #else
 699    for (i = 0; attrib_list[i * 2]; i++) {
 700       switch (attrib_list[i * 2]) {
 701       case GLX_PBUFFER_WIDTH:
 702          width = attrib_list[i * 2 + 1];
 703          break;
 704       case GLX_PBUFFER_HEIGHT:
 705          height = attrib_list[i * 2 + 1];
 706          break;
 707       }
 708    }
 709
 710    return (GLXPbuffer) CreatePbuffer(dpy, (struct glx_config *) config,
 711                                      width, height, attrib_list, GL_TRUE);
 712 #endif
 713 }
 714
 715
 716 /**
 717  * Destroy an existing pbuffer.
 718  */
 719 _X_EXPORT void
 720 glXDestroyPbuffer(Display * dpy, GLXPbuffer pbuf)
 721 {
 722 #ifdef GLX_USE_APPLEGL
 723    if (apple_glx_pbuffer_destroy(dpy, pbuf)) {
 724       __glXSendError(dpy, GLXBadPbuffer, pbuf, X_GLXDestroyPbuffer, false);
 725    }
 726 #else
 727    DestroyPbuffer(dpy, pbuf);
 728 #endif
 729 }
 730
 731
 732 /**
 733  * Query an attribute of a drawable.
 734  */
 735 _X_EXPORT void
 736 glXQueryDrawable(Display * dpy, GLXDrawable drawable,
 737                  int attribute, unsigned int *value)
 738 {
 739    WARN_ONCE_GLX_1_3(dpy, __func__);
 740 #ifdef GLX_USE_APPLEGL
 741    Window root;
 742    int x, y;
 743    unsigned int width, height, bd, depth;
 744
 745    if (apple_glx_pixmap_query(drawable, attribute, value))
 746       return;                   /*done */
 747
 748    if (apple_glx_pbuffer_query(drawable, attribute, value))
 749       return;                   /*done */
 750
 751    /*
 752     * The OpenGL spec states that we should report GLXBadDrawable if
 753     * the drawable is invalid, however doing so would require that we
 754     * use XSetErrorHandler(), which is known to not be thread safe.
 755     * If we use a round-trip call to validate the drawable, there could
 756     * be a race, so instead we just opt in favor of letting the
 757     * XGetGeometry request fail with a GetGeometry request X error
 758     * rather than GLXBadDrawable, in what is hoped to be a rare
 759     * case of an invalid drawable.  In practice most and possibly all
 760     * X11 apps using GLX shouldn't notice a difference.
 761     */
 762    if (XGetGeometry
 763        (dpy, drawable, &root, &x, &y, &width, &height, &bd, &depth)) {
 764       switch (attribute) {
 765       case GLX_WIDTH:
 766          *value = width;
 767          break;
 768
 769       case GLX_HEIGHT:
 770          *value = height;
 771          break;
 772       }
 773    }
 774 #else
 775    GetDrawableAttribute(dpy, drawable, attribute, value);
 776 #endif
 777 }
 778
 779
 780 #ifndef GLX_USE_APPLEGL
 781 /**
 782  * Query an attribute of a pbuffer.
 783  */
 784 _X_EXPORT int
 785 glXQueryGLXPbufferSGIX(Display * dpy, GLXPbufferSGIX drawable,
 786                        int attribute, unsigned int *value)
 787 {
 788    return GetDrawableAttribute(dpy, drawable, attribute, value);
 789 }
 790 #endif
 791
 792 /**
 793  * Select the event mask for a drawable.
 794  */
 795 _X_EXPORT void
 796 glXSelectEvent(Display * dpy, GLXDrawable drawable, unsigned long mask)
 797 {
 798 #ifdef GLX_USE_APPLEGL
 799    XWindowAttributes xwattr;
 800
 801    if (apple_glx_pbuffer_set_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.
 807     */
 808    if (XGetWindowAttributes(dpy, drawable, &xwattr))
 809       return;                   /*done */
 810    /* The drawable seems to be invalid.  Report an error. */
 811
 812    __glXSendError(dpy, GLXBadDrawable, drawable,
 813                   X_GLXChangeDrawableAttributes, false);
 814 #else
 815    CARD32 attribs[2];
 816
 817    attribs[0] = (CARD32) GLX_EVENT_MASK;
 818    attribs[1] = (CARD32) mask;
 819
 820    ChangeDrawableAttribute(dpy, drawable, attribs, 1);
 821 #endif
 822 }
 823
 824
 825 /**
 826  * Get the selected event mask for a drawable.
 827  */
 828 _X_EXPORT void
 829 glXGetSelectedEvent(Display * dpy, GLXDrawable drawable, unsigned long *mask)
 830 {
 831 #ifdef GLX_USE_APPLEGL
 832    XWindowAttributes xwattr;
 833
 834    if (apple_glx_pbuffer_get_event_mask(drawable, mask))
 835       return;                   /*done */
 836
 837    /*
 838     * The spec allows a window, but currently there are no valid
 839     * events for a window, so do nothing, but set the mask to 0.
 840     */
 841    if (XGetWindowAttributes(dpy, drawable, &xwattr)) {
 842       /* The window is valid, so set the mask to 0. */
 843       *mask = 0;
 844       return;                   /*done */
 845    }
 846    /* The drawable seems to be invalid.  Report an error. */
 847
 848    __glXSendError(dpy, GLXBadDrawable, drawable, X_GLXGetDrawableAttributes,
 849                   true);
 850 #else
 851    unsigned int value;
 852
 853
 854    /* The non-sense with value is required because on LP64 platforms
 855     * sizeof(unsigned int) != sizeof(unsigned long).  On little-endian
 856     * we could just type-cast the pointer, but why?
 857     */
 858
 859    GetDrawableAttribute(dpy, drawable, GLX_EVENT_MASK_SGIX, &value);
 860    *mask = value;
 861 #endif
 862 }
 863
 864
 865 _X_EXPORT GLXPixmap
 866 glXCreatePixmap(Display * dpy, GLXFBConfig config, Pixmap pixmap,
 867                 const int *attrib_list)
 868 {
 869    WARN_ONCE_GLX_1_3(dpy, __func__);
 870
 871 #ifdef GLX_USE_APPLEGL
 872    const struct glx_config *modes = (const struct glx_config *) config;
 873
 874    if (apple_glx_pixmap_create(dpy, modes->screen, pixmap, modes))
 875       return None;
 876
 877    return pixmap;
 878 #else
 879    return CreateDrawable(dpy, (struct glx_config *) config,
 880                          (Drawable) pixmap, attrib_list, X_GLXCreatePixmap);
 881 #endif
 882 }
 883
 884
 885 _X_EXPORT GLXWindow
 886 glXCreateWindow(Display * dpy, GLXFBConfig config, Window win,
 887                 const int *attrib_list)
 888 {
 889    WARN_ONCE_GLX_1_3(dpy, __func__);
 890 #ifdef GLX_USE_APPLEGL
 891    XWindowAttributes xwattr;
 892    XVisualInfo *visinfo;
 893
 894    (void) attrib_list;          /*unused according to GLX 1.4 */
 895
 896    XGetWindowAttributes(dpy, win, &xwattr);
 897
 898    visinfo = glXGetVisualFromFBConfig(dpy, config);
 899
 900    if (NULL == visinfo) {
 901       __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateWindow, false);
 902       return None;
 903    }
 904
 905    if (visinfo->visualid != XVisualIDFromVisual(xwattr.visual)) {
 906       __glXSendError(dpy, BadMatch, 0, X_GLXCreateWindow, true);
 907       return None;
 908    }
 909
 910    XFree(visinfo);
 911
 912    return win;
 913 #else
 914    return CreateDrawable(dpy, (struct glx_config *) config,
 915                          (Drawable) win, attrib_list, X_GLXCreateWindow);
 916 #endif
 917 }
 918
 919
 920 _X_EXPORT void
 921 glXDestroyPixmap(Display * dpy, GLXPixmap pixmap)
 922 {
 923    WARN_ONCE_GLX_1_3(dpy, __func__);
 924 #ifdef GLX_USE_APPLEGL
 925    if (apple_glx_pixmap_destroy(dpy, pixmap))
 926       __glXSendError(dpy, GLXBadPixmap, pixmap, X_GLXDestroyPixmap, false);
 927 #else
 928    DestroyDrawable(dpy, (GLXDrawable) pixmap, X_GLXDestroyPixmap);
 929 #endif
 930 }
 931
 932
 933 _X_EXPORT void
 934 glXDestroyWindow(Display * dpy, GLXWindow win)
 935 {
 936    WARN_ONCE_GLX_1_3(dpy, __func__);
 937 #ifndef GLX_USE_APPLEGL
 938    DestroyDrawable(dpy, (GLXDrawable) win, X_GLXDestroyWindow);
 939 #endif
 940 }
 941
 942 #ifndef GLX_USE_APPLEGL
 943 _X_EXPORT
 944 GLX_ALIAS_VOID(glXDestroyGLXPbufferSGIX,
 945                (Display * dpy, GLXPbufferSGIX pbuf),
 946                (dpy, pbuf), glXDestroyPbuffer)
 947
 948 _X_EXPORT
 949 GLX_ALIAS_VOID(glXSelectEventSGIX,
 950                (Display * dpy, GLXDrawable drawable,
 951                 unsigned long mask), (dpy, drawable, mask), glXSelectEvent)
 952
 953 _X_EXPORT
 954 GLX_ALIAS_VOID(glXGetSelectedEventSGIX,
 955                (Display * dpy, GLXDrawable drawable,
 956                 unsigned long *mask), (dpy, drawable, mask),
 957                glXGetSelectedEvent)
 958 #endif