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 #endif
  44
  45 #include "glx_error.h"
  46
  47 #define WARN_ONCE_GLX_1_3(a, b) {               \
  48                 static int warned=1;            \
  49                 if(warned) {                    \
  50                         warn_GLX_1_3((a), b );  \
  51                         warned=0;               \
  52                 }                               \
  53         }
  54
  55 /**
  56  * Emit a warning when clients use GLX 1.3 functions on pre-1.3 systems.
  57  */
  58 static void
  59 warn_GLX_1_3(Display * dpy, const char *function_name)
  60 {
  61    struct glx_display *priv = __glXInitialize(dpy);
  62
  63    if (priv && priv->minorVersion < 3) {
  64       fprintf(stderr,
  65               "WARNING: Application calling GLX 1.3 function \"%s\" "
  66               "when GLX 1.3 is not supported!  This is an application bug!\n",
  67               function_name);
  68    }
  69 }
  70
  71 #ifndef GLX_USE_APPLEGL
  72 /**
  73  * Change a drawable's attribute.
  74  *
  75  * This function is used to implement \c glXSelectEvent and
  76  * \c glXSelectEventSGIX.
  77  *
  78  * \note
  79  * This function dynamically determines whether to use the SGIX_pbuffer
  80  * version of the protocol or the GLX 1.3 version of the protocol.
  81  */
  82 static void
  83 ChangeDrawableAttribute(Display * dpy, GLXDrawable drawable,
  84                         const CARD32 * attribs, size_t num_attribs)
  85 {
  86    struct glx_display *priv = __glXInitialize(dpy);
  87 #ifdef GLX_DIRECT_RENDERING
  88    __GLXDRIdrawable *pdraw;
  89 #endif
  90    CARD32 *output;
  91    CARD8 opcode;
  92    int i;
  93
  94    if ((priv == NULL) || (dpy == NULL) || (drawable == 0)) {
  95       return;
  96    }
  97
  98    opcode = __glXSetupForCommand(dpy);
  99    if (!opcode)
 100       return;
 101
 102    LockDisplay(dpy);
 103
 104    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 105       xGLXChangeDrawableAttributesReq *req;
 106
 107       GetReqExtra(GLXChangeDrawableAttributes, 8 * num_attribs, req);
 108       output = (CARD32 *) (req + 1);
 109
 110       req->reqType = opcode;
 111       req->glxCode = X_GLXChangeDrawableAttributes;
 112       req->drawable = drawable;
 113       req->numAttribs = (CARD32) num_attribs;
 114    }
 115    else {
 116       xGLXVendorPrivateWithReplyReq *vpreq;
 117
 118       GetReqExtra(GLXVendorPrivateWithReply, 8 + (8 * num_attribs), vpreq);
 119       output = (CARD32 *) (vpreq + 1);
 120
 121       vpreq->reqType = opcode;
 122       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 123       vpreq->vendorCode = X_GLXvop_ChangeDrawableAttributesSGIX;
 124
 125       output[0] = (CARD32) drawable;
 126       output[1] = num_attribs;
 127       output += 2;
 128    }
 129
 130    (void) memcpy(output, attribs, sizeof(CARD32) * 2 * num_attribs);
 131
 132    UnlockDisplay(dpy);
 133    SyncHandle();
 134
 135 #ifdef GLX_DIRECT_RENDERING
 136    pdraw = GetGLXDRIDrawable(dpy, drawable);
 137
 138    if (!pdraw)
 139       return;
 140
 141    for (i = 0; i < num_attribs; i++) {
 142       switch(attribs[i * 2]) {
 143       case GLX_EVENT_MASK:
 144          /* Keep a local copy for masking out DRI2 proto events as needed */
 145          pdraw->eventMask = attribs[i * 2 + 1];
 146          break;
 147       }
 148    }
 149 #endif
 150
 151    return;
 152 }
 153
 154
 155 #ifdef GLX_DIRECT_RENDERING
 156 static GLenum
 157 determineTextureTarget(const int *attribs, int numAttribs)
 158 {
 159    GLenum target = 0;
 160    int i;
 161
 162    for (i = 0; i < numAttribs; i++) {
 163       if (attribs[2 * i] == GLX_TEXTURE_TARGET_EXT) {
 164          switch (attribs[2 * i + 1]) {
 165          case GLX_TEXTURE_2D_EXT:
 166             target = GL_TEXTURE_2D;
 167             break;
 168          case GLX_TEXTURE_RECTANGLE_EXT:
 169             target = GL_TEXTURE_RECTANGLE_ARB;
 170             break;
 171          }
 172       }
 173    }
 174
 175    return target;
 176 }
 177
 178 static GLenum
 179 determineTextureFormat(const int *attribs, int numAttribs)
 180 {
 181    int i;
 182
 183    for (i = 0; i < numAttribs; i++) {
 184       if (attribs[2 * i] == GLX_TEXTURE_FORMAT_EXT)
 185          return attribs[2 * i + 1];
 186    }
 187
 188    return 0;
 189 }
 190
 191 static GLboolean
 192 CreateDRIDrawable(Display *dpy, struct glx_config *config,
 193                   XID drawable, XID glxdrawable,
 194                   const int *attrib_list, size_t num_attribs)
 195 {
 196    struct glx_display *const priv = __glXInitialize(dpy);
 197    __GLXDRIdrawable *pdraw;
 198    struct glx_screen *psc;
 199
 200    if (priv == NULL) {
 201       fprintf(stderr, "failed to create drawable\n");
 202       return GL_FALSE;
 203    }
 204
 205    psc = priv->screens[config->screen];
 206    if (psc->driScreen == NULL)
 207       return GL_TRUE;
 208
 209    pdraw = psc->driScreen->createDrawable(psc, drawable,
 210                                           glxdrawable, config);
 211    if (pdraw == NULL) {
 212       fprintf(stderr, "failed to create drawable\n");
 213       return GL_FALSE;
 214    }
 215
 216    if (__glxHashInsert(priv->drawHash, glxdrawable, pdraw)) {
 217       (*pdraw->destroyDrawable) (pdraw);
 218       return GL_FALSE;
 219    }
 220
 221    pdraw->textureTarget = determineTextureTarget(attrib_list, num_attribs);
 222    pdraw->textureFormat = determineTextureFormat(attrib_list, num_attribs);
 223
 224    return GL_TRUE;
 225 }
 226
 227 static void
 228 DestroyDRIDrawable(Display *dpy, GLXDrawable drawable, int destroy_xdrawable)
 229 {
 230    struct glx_display *const priv = __glXInitialize(dpy);
 231    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
 232    XID xid;
 233
 234    if (priv != NULL && pdraw != NULL) {
 235       xid = pdraw->xDrawable;
 236       (*pdraw->destroyDrawable) (pdraw);
 237       __glxHashDelete(priv->drawHash, drawable);
 238       if (destroy_xdrawable)
 239          XFreePixmap(priv->dpy, xid);
 240    }
 241 }
 242
 243 #else
 244
 245 static GLboolean
 246 CreateDRIDrawable(Display *dpy, const struct glx_config * fbconfig,
 247                   XID drawable, XID glxdrawable,
 248                   const int *attrib_list, size_t num_attribs)
 249 {
 250     return GL_TRUE;
 251 }
 252
 253 static void
 254 DestroyDRIDrawable(Display *dpy, GLXDrawable drawable, int destroy_xdrawable)
 255 {
 256 }
 257
 258 #endif
 259
 260 /**
 261  * Get a drawable's attribute.
 262  *
 263  * This function is used to implement \c glXGetSelectedEvent and
 264  * \c glXGetSelectedEventSGIX.
 265  *
 266  * \note
 267  * This function dynamically determines whether to use the SGIX_pbuffer
 268  * version of the protocol or the GLX 1.3 version of the protocol.
 269  *
 270  * \todo
 271  * The number of attributes returned is likely to be small, probably less than
 272  * 10.  Given that, this routine should try to use an array on the stack to
 273  * capture the reply rather than always calling Xmalloc.
 274  */
 275 static int
 276 GetDrawableAttribute(Display * dpy, GLXDrawable drawable,
 277                      int attribute, unsigned int *value)
 278 {
 279    struct glx_display *priv;
 280    xGLXGetDrawableAttributesReply reply;
 281    CARD32 *data;
 282    CARD8 opcode;
 283    unsigned int length;
 284    unsigned int i;
 285    unsigned int num_attributes;
 286    GLboolean use_glx_1_3;
 287
 288    if (dpy == NULL)
 289       return 0;
 290
 291    /* Page 38 (page 52 of the PDF) of glxencode1.3.pdf says:
 292     *
 293     *     "If drawable is not a valid GLX drawable, a GLXBadDrawable error is
 294     *     generated."
 295     */
 296    if (drawable == 0) {
 297       __glXSendError(dpy, GLXBadDrawable, 0, X_GLXGetDrawableAttributes, false);
 298       return 0;
 299    }
 300
 301    priv = __glXInitialize(dpy);
 302    if (priv == NULL)
 303       return 0;
 304
 305    use_glx_1_3 = ((priv->majorVersion > 1) || (priv->minorVersion >= 3));
 306
 307    *value = 0;
 308
 309
 310    opcode = __glXSetupForCommand(dpy);
 311    if (!opcode)
 312       return 0;
 313
 314    LockDisplay(dpy);
 315
 316    if (use_glx_1_3) {
 317       xGLXGetDrawableAttributesReq *req;
 318
 319       GetReq(GLXGetDrawableAttributes, req);
 320       req->reqType = opcode;
 321       req->glxCode = X_GLXGetDrawableAttributes;
 322       req->drawable = drawable;
 323    }
 324    else {
 325       xGLXVendorPrivateWithReplyReq *vpreq;
 326
 327       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 328       data = (CARD32 *) (vpreq + 1);
 329       data[0] = (CARD32) drawable;
 330
 331       vpreq->reqType = opcode;
 332       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 333       vpreq->vendorCode = X_GLXvop_GetDrawableAttributesSGIX;
 334    }
 335
 336    _XReply(dpy, (xReply *) & reply, 0, False);
 337
 338    if (reply.type == X_Error) {
 339       UnlockDisplay(dpy);
 340       SyncHandle();
 341       return 0;
 342    }
 343
 344    length = reply.length;
 345    if (length) {
 346       num_attributes = (use_glx_1_3) ? reply.numAttribs : length / 2;
 347       data = malloc(length * sizeof(CARD32));
 348       if (data == NULL) {
 349          /* Throw data on the floor */
 350          _XEatData(dpy, length);
 351       }
 352       else {
 353          _XRead(dpy, (char *) data, length * sizeof(CARD32));
 354
 355          /* Search the set of returned attributes for the attribute requested by
 356           * the caller.
 357           */
 358          for (i = 0; i < num_attributes; i++) {
 359             if (data[i * 2] == attribute) {
 360                *value = data[(i * 2) + 1];
 361                break;
 362             }
 363          }
 364
 365 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 366          {
 367             __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
 368
 369             if (pdraw != NULL && !pdraw->textureTarget)
 370                pdraw->textureTarget =
 371                   determineTextureTarget((const int *) data, num_attributes);
 372             if (pdraw != NULL && !pdraw->textureFormat)
 373                pdraw->textureFormat =
 374                   determineTextureFormat((const int *) data, num_attributes);
 375          }
 376 #endif
 377
 378          free(data);
 379       }
 380    }
 381
 382    UnlockDisplay(dpy);
 383    SyncHandle();
 384
 385    return 0;
 386 }
 387
 388 static void
 389 protocolDestroyDrawable(Display *dpy, GLXDrawable drawable, CARD32 glxCode)
 390 {
 391    xGLXDestroyPbufferReq *req;
 392    CARD8 opcode;
 393
 394    opcode = __glXSetupForCommand(dpy);
 395    if (!opcode)
 396       return;
 397
 398    LockDisplay(dpy);
 399
 400    GetReq(GLXDestroyPbuffer, req);
 401    req->reqType = opcode;
 402    req->glxCode = glxCode;
 403    req->pbuffer = (GLXPbuffer) drawable;
 404
 405    UnlockDisplay(dpy);
 406    SyncHandle();
 407 }
 408
 409 /**
 410  * Create a non-pbuffer GLX drawable.
 411  */
 412 static GLXDrawable
 413 CreateDrawable(Display *dpy, struct glx_config *config,
 414                Drawable drawable, const int *attrib_list, CARD8 glxCode)
 415 {
 416    xGLXCreateWindowReq *req;
 417    struct glx_drawable *glxDraw;
 418    CARD32 *data;
 419    unsigned int i;
 420    CARD8 opcode;
 421    GLXDrawable xid;
 422
 423    i = 0;
 424    if (attrib_list) {
 425       while (attrib_list[i * 2] != None)
 426          i++;
 427    }
 428
 429    opcode = __glXSetupForCommand(dpy);
 430    if (!opcode)
 431       return None;
 432
 433    glxDraw = malloc(sizeof(*glxDraw));
 434    if (!glxDraw)
 435       return None;
 436
 437    LockDisplay(dpy);
 438    GetReqExtra(GLXCreateWindow, 8 * i, req);
 439    data = (CARD32 *) (req + 1);
 440
 441    req->reqType = opcode;
 442    req->glxCode = glxCode;
 443    req->screen = config->screen;
 444    req->fbconfig = config->fbconfigID;
 445    req->window = drawable;
 446    req->glxwindow = xid = XAllocID(dpy);
 447    req->numAttribs = i;
 448
 449    if (attrib_list)
 450       memcpy(data, attrib_list, 8 * i);
 451
 452    UnlockDisplay(dpy);
 453    SyncHandle();
 454
 455    if (InitGLXDrawable(dpy, glxDraw, drawable, xid)) {
 456       free(glxDraw);
 457       return None;
 458    }
 459
 460    if (!CreateDRIDrawable(dpy, config, drawable, xid, attrib_list, i)) {
 461       if (glxCode == X_GLXCreatePixmap)
 462          glxCode = X_GLXDestroyPixmap;
 463       else
 464          glxCode = X_GLXDestroyWindow;
 465       protocolDestroyDrawable(dpy, xid, glxCode);
 466       xid = None;
 467    }
 468
 469    return xid;
 470 }
 471
 472
 473 /**
 474  * Destroy a non-pbuffer GLX drawable.
 475  */
 476 static void
 477 DestroyDrawable(Display * dpy, GLXDrawable drawable, CARD32 glxCode)
 478 {
 479    if ((dpy == NULL) || (drawable == 0)) {
 480       return;
 481    }
 482
 483    protocolDestroyDrawable(dpy, drawable, glxCode);
 484
 485    DestroyGLXDrawable(dpy, drawable);
 486    DestroyDRIDrawable(dpy, drawable, GL_FALSE);
 487
 488    return;
 489 }
 490
 491
 492 /**
 493  * Create a pbuffer.
 494  *
 495  * This function is used to implement \c glXCreatePbuffer and
 496  * \c glXCreateGLXPbufferSGIX.
 497  *
 498  * \note
 499  * This function dynamically determines whether to use the SGIX_pbuffer
 500  * version of the protocol or the GLX 1.3 version of the protocol.
 501  */
 502 static GLXDrawable
 503 CreatePbuffer(Display * dpy, struct glx_config *config,
 504               unsigned int width, unsigned int height,
 505               const int *attrib_list, GLboolean size_in_attribs)
 506 {
 507    struct glx_display *priv = __glXInitialize(dpy);
 508    GLXDrawable id = 0;
 509    CARD32 *data;
 510    CARD8 opcode;
 511    unsigned int i;
 512    Pixmap pixmap;
 513    GLboolean glx_1_3 = GL_FALSE;
 514
 515    if (priv == NULL)
 516       return None;
 517
 518    i = 0;
 519    if (attrib_list) {
 520       while (attrib_list[i * 2])
 521          i++;
 522    }
 523
 524    opcode = __glXSetupForCommand(dpy);
 525    if (!opcode)
 526       return None;
 527
 528    LockDisplay(dpy);
 529    id = XAllocID(dpy);
 530
 531    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 532       xGLXCreatePbufferReq *req;
 533       unsigned int extra = (size_in_attribs) ? 0 : 2;
 534
 535       glx_1_3 = GL_TRUE;
 536
 537       GetReqExtra(GLXCreatePbuffer, (8 * (i + extra)), req);
 538       data = (CARD32 *) (req + 1);
 539
 540       req->reqType = opcode;
 541       req->glxCode = X_GLXCreatePbuffer;
 542       req->screen = config->screen;
 543       req->fbconfig = config->fbconfigID;
 544       req->pbuffer = id;
 545       req->numAttribs = i + extra;
 546
 547       if (!size_in_attribs) {
 548          data[(2 * i) + 0] = GLX_PBUFFER_WIDTH;
 549          data[(2 * i) + 1] = width;
 550          data[(2 * i) + 2] = GLX_PBUFFER_HEIGHT;
 551          data[(2 * i) + 3] = height;
 552          data += 4;
 553       }
 554    }
 555    else {
 556       xGLXVendorPrivateReq *vpreq;
 557
 558       GetReqExtra(GLXVendorPrivate, 20 + (8 * i), vpreq);
 559       data = (CARD32 *) (vpreq + 1);
 560
 561       vpreq->reqType = opcode;
 562       vpreq->glxCode = X_GLXVendorPrivate;
 563       vpreq->vendorCode = X_GLXvop_CreateGLXPbufferSGIX;
 564
 565       data[0] = config->screen;
 566       data[1] = config->fbconfigID;
 567       data[2] = id;
 568       data[3] = width;
 569       data[4] = height;
 570       data += 5;
 571    }
 572
 573    (void) memcpy(data, attrib_list, sizeof(CARD32) * 2 * i);
 574
 575    UnlockDisplay(dpy);
 576    SyncHandle();
 577
 578    pixmap = XCreatePixmap(dpy, RootWindow(dpy, config->screen),
 579                           width, height, config->rgbBits);
 580
 581    if (!CreateDRIDrawable(dpy, config, pixmap, id, attrib_list, i)) {
 582       CARD32 o = glx_1_3 ? X_GLXDestroyPbuffer : X_GLXvop_DestroyGLXPbufferSGIX;
 583       XFreePixmap(dpy, pixmap);
 584       protocolDestroyDrawable(dpy, id, o);
 585       id = None;
 586    }
 587
 588    return id;
 589 }
 590
 591 /**
 592  * Destroy a pbuffer.
 593  *
 594  * This function is used to implement \c glXDestroyPbuffer and
 595  * \c glXDestroyGLXPbufferSGIX.
 596  *
 597  * \note
 598  * This function dynamically determines whether to use the SGIX_pbuffer
 599  * version of the protocol or the GLX 1.3 version of the protocol.
 600  */
 601 static void
 602 DestroyPbuffer(Display * dpy, GLXDrawable drawable)
 603 {
 604    struct glx_display *priv = __glXInitialize(dpy);
 605    CARD8 opcode;
 606
 607    if ((priv == NULL) || (dpy == NULL) || (drawable == 0)) {
 608       return;
 609    }
 610
 611    opcode = __glXSetupForCommand(dpy);
 612    if (!opcode)
 613       return;
 614
 615    LockDisplay(dpy);
 616
 617    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 618       xGLXDestroyPbufferReq *req;
 619
 620       GetReq(GLXDestroyPbuffer, req);
 621       req->reqType = opcode;
 622       req->glxCode = X_GLXDestroyPbuffer;
 623       req->pbuffer = (GLXPbuffer) drawable;
 624    }
 625    else {
 626       xGLXVendorPrivateWithReplyReq *vpreq;
 627       CARD32 *data;
 628
 629       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 630       data = (CARD32 *) (vpreq + 1);
 631
 632       data[0] = (CARD32) drawable;
 633
 634       vpreq->reqType = opcode;
 635       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 636       vpreq->vendorCode = X_GLXvop_DestroyGLXPbufferSGIX;
 637    }
 638
 639    UnlockDisplay(dpy);
 640    SyncHandle();
 641
 642    DestroyDRIDrawable(dpy, drawable, GL_TRUE);
 643
 644    return;
 645 }
 646
 647 /**
 648  * Create a new pbuffer.
 649  */
 650 _X_EXPORT GLXPbufferSGIX
 651 glXCreateGLXPbufferSGIX(Display * dpy, GLXFBConfigSGIX config,
 652                         unsigned int width, unsigned int height,
 653                         int *attrib_list)
 654 {
 655    return (GLXPbufferSGIX) CreatePbuffer(dpy, (struct glx_config *) config,
 656                                          width, height,
 657                                          attrib_list, GL_FALSE);
 658 }
 659
 660 #endif /* GLX_USE_APPLEGL */
 661
 662 /**
 663  * Create a new pbuffer.
 664  */
 665 _X_EXPORT GLXPbuffer
 666 glXCreatePbuffer(Display * dpy, GLXFBConfig config, const int *attrib_list)
 667 {
 668    int i, width, height;
 669 #ifdef GLX_USE_APPLEGL
 670    GLXPbuffer result;
 671    int errorcode;
 672 #endif
 673
 674    width = 0;
 675    height = 0;
 676
 677    WARN_ONCE_GLX_1_3(dpy, __func__);
 678
 679 #ifdef GLX_USE_APPLEGL
 680    for (i = 0; attrib_list[i]; ++i) {
 681       switch (attrib_list[i]) {
 682       case GLX_PBUFFER_WIDTH:
 683          width = attrib_list[i + 1];
 684          ++i;
 685          break;
 686
 687       case GLX_PBUFFER_HEIGHT:
 688          height = attrib_list[i + 1];
 689          ++i;
 690          break;
 691
 692       case GLX_LARGEST_PBUFFER:
 693          /* This is a hint we should probably handle, but how? */
 694          ++i;
 695          break;
 696
 697       case GLX_PRESERVED_CONTENTS:
 698          /* The contents are always preserved with AppleSGLX with CGL. */
 699          ++i;
 700          break;
 701
 702       default:
 703          return None;
 704       }
 705    }
 706
 707    if (apple_glx_pbuffer_create(dpy, config, width, height, &errorcode,
 708                                 &result)) {
 709       /*
 710        * apple_glx_pbuffer_create only sets the errorcode to core X11
 711        * errors.
 712        */
 713       __glXSendError(dpy, errorcode, 0, X_GLXCreatePbuffer, true);
 714
 715       return None;
 716    }
 717
 718    return result;
 719 #else
 720    for (i = 0; attrib_list[i * 2]; i++) {
 721       switch (attrib_list[i * 2]) {
 722       case GLX_PBUFFER_WIDTH:
 723          width = attrib_list[i * 2 + 1];
 724          break;
 725       case GLX_PBUFFER_HEIGHT:
 726          height = attrib_list[i * 2 + 1];
 727          break;
 728       }
 729    }
 730
 731    return (GLXPbuffer) CreatePbuffer(dpy, (struct glx_config *) config,
 732                                      width, height, attrib_list, GL_TRUE);
 733 #endif
 734 }
 735
 736
 737 /**
 738  * Destroy an existing pbuffer.
 739  */
 740 _X_EXPORT void
 741 glXDestroyPbuffer(Display * dpy, GLXPbuffer pbuf)
 742 {
 743 #ifdef GLX_USE_APPLEGL
 744    if (apple_glx_pbuffer_destroy(dpy, pbuf)) {
 745       __glXSendError(dpy, GLXBadPbuffer, pbuf, X_GLXDestroyPbuffer, false);
 746    }
 747 #else
 748    DestroyPbuffer(dpy, pbuf);
 749 #endif
 750 }
 751
 752
 753 /**
 754  * Query an attribute of a drawable.
 755  */
 756 _X_EXPORT void
 757 glXQueryDrawable(Display * dpy, GLXDrawable drawable,
 758                  int attribute, unsigned int *value)
 759 {
 760    WARN_ONCE_GLX_1_3(dpy, __func__);
 761 #ifdef GLX_USE_APPLEGL
 762    Window root;
 763    int x, y;
 764    unsigned int width, height, bd, depth;
 765
 766    if (apple_glx_pixmap_query(drawable, attribute, value))
 767       return;                   /*done */
 768
 769    if (apple_glx_pbuffer_query(drawable, attribute, value))
 770       return;                   /*done */
 771
 772    /*
 773     * The OpenGL spec states that we should report GLXBadDrawable if
 774     * the drawable is invalid, however doing so would require that we
 775     * use XSetErrorHandler(), which is known to not be thread safe.
 776     * If we use a round-trip call to validate the drawable, there could
 777     * be a race, so instead we just opt in favor of letting the
 778     * XGetGeometry request fail with a GetGeometry request X error
 779     * rather than GLXBadDrawable, in what is hoped to be a rare
 780     * case of an invalid drawable.  In practice most and possibly all
 781     * X11 apps using GLX shouldn't notice a difference.
 782     */
 783    if (XGetGeometry
 784        (dpy, drawable, &root, &x, &y, &width, &height, &bd, &depth)) {
 785       switch (attribute) {
 786       case GLX_WIDTH:
 787          *value = width;
 788          break;
 789
 790       case GLX_HEIGHT:
 791          *value = height;
 792          break;
 793       }
 794    }
 795 #else
 796    GetDrawableAttribute(dpy, drawable, attribute, value);
 797 #endif
 798 }
 799
 800
 801 #ifndef GLX_USE_APPLEGL
 802 /**
 803  * Query an attribute of a pbuffer.
 804  */
 805 _X_EXPORT int
 806 glXQueryGLXPbufferSGIX(Display * dpy, GLXPbufferSGIX drawable,
 807                        int attribute, unsigned int *value)
 808 {
 809    return GetDrawableAttribute(dpy, drawable, attribute, value);
 810 }
 811 #endif
 812
 813 /**
 814  * Select the event mask for a drawable.
 815  */
 816 _X_EXPORT void
 817 glXSelectEvent(Display * dpy, GLXDrawable drawable, unsigned long mask)
 818 {
 819 #ifdef GLX_USE_APPLEGL
 820    XWindowAttributes xwattr;
 821
 822    if (apple_glx_pbuffer_set_event_mask(drawable, mask))
 823       return;                   /*done */
 824
 825    /*
 826     * The spec allows a window, but currently there are no valid
 827     * events for a window, so do nothing.
 828     */
 829    if (XGetWindowAttributes(dpy, drawable, &xwattr))
 830       return;                   /*done */
 831    /* The drawable seems to be invalid.  Report an error. */
 832
 833    __glXSendError(dpy, GLXBadDrawable, drawable,
 834                   X_GLXChangeDrawableAttributes, false);
 835 #else
 836    CARD32 attribs[2];
 837
 838    attribs[0] = (CARD32) GLX_EVENT_MASK;
 839    attribs[1] = (CARD32) mask;
 840
 841    ChangeDrawableAttribute(dpy, drawable, attribs, 1);
 842 #endif
 843 }
 844
 845
 846 /**
 847  * Get the selected event mask for a drawable.
 848  */
 849 _X_EXPORT void
 850 glXGetSelectedEvent(Display * dpy, GLXDrawable drawable, unsigned long *mask)
 851 {
 852 #ifdef GLX_USE_APPLEGL
 853    XWindowAttributes xwattr;
 854
 855    if (apple_glx_pbuffer_get_event_mask(drawable, mask))
 856       return;                   /*done */
 857
 858    /*
 859     * The spec allows a window, but currently there are no valid
 860     * events for a window, so do nothing, but set the mask to 0.
 861     */
 862    if (XGetWindowAttributes(dpy, drawable, &xwattr)) {
 863       /* The window is valid, so set the mask to 0. */
 864       *mask = 0;
 865       return;                   /*done */
 866    }
 867    /* The drawable seems to be invalid.  Report an error. */
 868
 869    __glXSendError(dpy, GLXBadDrawable, drawable, X_GLXGetDrawableAttributes,
 870                   true);
 871 #else
 872    unsigned int value;
 873
 874
 875    /* The non-sense with value is required because on LP64 platforms
 876     * sizeof(unsigned int) != sizeof(unsigned long).  On little-endian
 877     * we could just type-cast the pointer, but why?
 878     */
 879
 880    GetDrawableAttribute(dpy, drawable, GLX_EVENT_MASK_SGIX, &value);
 881    *mask = value;
 882 #endif
 883 }
 884
 885
 886 _X_EXPORT GLXPixmap
 887 glXCreatePixmap(Display * dpy, GLXFBConfig config, Pixmap pixmap,
 888                 const int *attrib_list)
 889 {
 890    WARN_ONCE_GLX_1_3(dpy, __func__);
 891
 892 #ifdef GLX_USE_APPLEGL
 893    const struct glx_config *modes = (const struct glx_config *) config;
 894
 895    if (apple_glx_pixmap_create(dpy, modes->screen, pixmap, modes))
 896       return None;
 897
 898    return pixmap;
 899 #else
 900    return CreateDrawable(dpy, (struct glx_config *) config,
 901                          (Drawable) pixmap, attrib_list, X_GLXCreatePixmap);
 902 #endif
 903 }
 904
 905
 906 _X_EXPORT GLXWindow
 907 glXCreateWindow(Display * dpy, GLXFBConfig config, Window win,
 908                 const int *attrib_list)
 909 {
 910    WARN_ONCE_GLX_1_3(dpy, __func__);
 911 #ifdef GLX_USE_APPLEGL
 912    XWindowAttributes xwattr;
 913    XVisualInfo *visinfo;
 914
 915    (void) attrib_list;          /*unused according to GLX 1.4 */
 916
 917    XGetWindowAttributes(dpy, win, &xwattr);
 918
 919    visinfo = glXGetVisualFromFBConfig(dpy, config);
 920
 921    if (NULL == visinfo) {
 922       __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateWindow, false);
 923       return None;
 924    }
 925
 926    if (visinfo->visualid != XVisualIDFromVisual(xwattr.visual)) {
 927       __glXSendError(dpy, BadMatch, 0, X_GLXCreateWindow, true);
 928       return None;
 929    }
 930
 931    free(visinfo);
 932
 933    return win;
 934 #else
 935    return CreateDrawable(dpy, (struct glx_config *) config,
 936                          (Drawable) win, attrib_list, X_GLXCreateWindow);
 937 #endif
 938 }
 939
 940
 941 _X_EXPORT void
 942 glXDestroyPixmap(Display * dpy, GLXPixmap pixmap)
 943 {
 944    WARN_ONCE_GLX_1_3(dpy, __func__);
 945 #ifdef GLX_USE_APPLEGL
 946    if (apple_glx_pixmap_destroy(dpy, pixmap))
 947       __glXSendError(dpy, GLXBadPixmap, pixmap, X_GLXDestroyPixmap, false);
 948 #else
 949    DestroyDrawable(dpy, (GLXDrawable) pixmap, X_GLXDestroyPixmap);
 950 #endif
 951 }
 952
 953
 954 _X_EXPORT void
 955 glXDestroyWindow(Display * dpy, GLXWindow win)
 956 {
 957    WARN_ONCE_GLX_1_3(dpy, __func__);
 958 #ifndef GLX_USE_APPLEGL
 959    DestroyDrawable(dpy, (GLXDrawable) win, X_GLXDestroyWindow);
 960 #endif
 961 }
 962
 963 #ifndef GLX_USE_APPLEGL
 964 _X_EXPORT
 965 GLX_ALIAS_VOID(glXDestroyGLXPbufferSGIX,
 966                (Display * dpy, GLXPbufferSGIX pbuf),
 967                (dpy, pbuf), glXDestroyPbuffer)
 968
 969 _X_EXPORT
 970 GLX_ALIAS_VOID(glXSelectEventSGIX,
 971                (Display * dpy, GLXDrawable drawable,
 972                 unsigned long mask), (dpy, drawable, mask), glXSelectEvent)
 973
 974 _X_EXPORT
 975 GLX_ALIAS_VOID(glXGetSelectedEventSGIX,
 976                (Display * dpy, GLXDrawable drawable,
 977                 unsigned long *mask), (dpy, drawable, mask),
 978                glXGetSelectedEvent)
 979 #endif