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/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 defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 289    __GLXDRIdrawable *pdraw;
 290 #endif
 291
 292    if (dpy == NULL)
 293       return 0;
 294
 295    /* Page 38 (page 52 of the PDF) of glxencode1.3.pdf says:
 296     *
 297     *     "If drawable is not a valid GLX drawable, a GLXBadDrawable error is
 298     *     generated."
 299     */
 300    if (drawable == 0) {
 301       __glXSendError(dpy, GLXBadDrawable, 0, X_GLXGetDrawableAttributes, false);
 302       return 0;
 303    }
 304
 305    priv = __glXInitialize(dpy);
 306    if (priv == NULL)
 307       return 0;
 308
 309    use_glx_1_3 = ((priv->majorVersion > 1) || (priv->minorVersion >= 3));
 310
 311    *value = 0;
 312
 313
 314    opcode = __glXSetupForCommand(dpy);
 315    if (!opcode)
 316       return 0;
 317
 318 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 319    pdraw = GetGLXDRIDrawable(dpy, drawable);
 320
 321    if (attribute == GLX_BACK_BUFFER_AGE_EXT) {
 322       struct glx_screen *psc = pdraw->psc;
 323       struct glx_context *gc = __glXGetCurrentContext();
 324
 325       /* The GLX_EXT_buffer_age spec says:
 326        *
 327        *   "If querying GLX_BACK_BUFFER_AGE_EXT and <draw> is not bound to
 328        *   the calling thread's current context a GLXBadDrawable error is
 329        *   generated."
 330        */
 331       if (gc == NULL || gc->currentDpy != dpy ||
 332          (gc->currentDrawable != drawable && gc->currentReadable != drawable)) {
 333          __glXSendError(dpy, GLXBadDrawable, drawable, X_GLXGetDrawableAttributes, false);
 334          return 0;
 335       }
 336
 337       if (psc->driScreen->getBufferAge != NULL)
 338          *value = psc->driScreen->getBufferAge(pdraw);
 339
 340       return 0;
 341    }
 342 #endif
 343
 344    LockDisplay(dpy);
 345
 346    if (use_glx_1_3) {
 347       xGLXGetDrawableAttributesReq *req;
 348
 349       GetReq(GLXGetDrawableAttributes, req);
 350       req->reqType = opcode;
 351       req->glxCode = X_GLXGetDrawableAttributes;
 352       req->drawable = drawable;
 353    }
 354    else {
 355       xGLXVendorPrivateWithReplyReq *vpreq;
 356
 357       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 358       data = (CARD32 *) (vpreq + 1);
 359       data[0] = (CARD32) drawable;
 360
 361       vpreq->reqType = opcode;
 362       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 363       vpreq->vendorCode = X_GLXvop_GetDrawableAttributesSGIX;
 364    }
 365
 366    _XReply(dpy, (xReply *) & reply, 0, False);
 367
 368    if (reply.type == X_Error) {
 369       UnlockDisplay(dpy);
 370       SyncHandle();
 371       return 0;
 372    }
 373
 374    length = reply.length;
 375    if (length) {
 376       num_attributes = (use_glx_1_3) ? reply.numAttribs : length / 2;
 377       data = malloc(length * sizeof(CARD32));
 378       if (data == NULL) {
 379          /* Throw data on the floor */
 380          _XEatData(dpy, length);
 381       }
 382       else {
 383          _XRead(dpy, (char *) data, length * sizeof(CARD32));
 384
 385          /* Search the set of returned attributes for the attribute requested by
 386           * the caller.
 387           */
 388          for (i = 0; i < num_attributes; i++) {
 389             if (data[i * 2] == attribute) {
 390                *value = data[(i * 2) + 1];
 391                break;
 392             }
 393          }
 394
 395 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 396          if (pdraw != NULL) {
 397             if (!pdraw->textureTarget)
 398                pdraw->textureTarget =
 399                   determineTextureTarget((const int *) data, num_attributes);
 400             if (!pdraw->textureFormat)
 401                pdraw->textureFormat =
 402                   determineTextureFormat((const int *) data, num_attributes);
 403          }
 404 #endif
 405
 406          free(data);
 407       }
 408    }
 409
 410    UnlockDisplay(dpy);
 411    SyncHandle();
 412
 413    return 0;
 414 }
 415
 416 static void
 417 protocolDestroyDrawable(Display *dpy, GLXDrawable drawable, CARD32 glxCode)
 418 {
 419    xGLXDestroyPbufferReq *req;
 420    CARD8 opcode;
 421
 422    opcode = __glXSetupForCommand(dpy);
 423    if (!opcode)
 424       return;
 425
 426    LockDisplay(dpy);
 427
 428    GetReq(GLXDestroyPbuffer, req);
 429    req->reqType = opcode;
 430    req->glxCode = glxCode;
 431    req->pbuffer = (GLXPbuffer) drawable;
 432
 433    UnlockDisplay(dpy);
 434    SyncHandle();
 435 }
 436
 437 /**
 438  * Create a non-pbuffer GLX drawable.
 439  */
 440 static GLXDrawable
 441 CreateDrawable(Display *dpy, struct glx_config *config,
 442                Drawable drawable, const int *attrib_list, CARD8 glxCode)
 443 {
 444    xGLXCreateWindowReq *req;
 445    struct glx_drawable *glxDraw;
 446    CARD32 *data;
 447    unsigned int i;
 448    CARD8 opcode;
 449    GLXDrawable xid;
 450
 451    i = 0;
 452    if (attrib_list) {
 453       while (attrib_list[i * 2] != None)
 454          i++;
 455    }
 456
 457    opcode = __glXSetupForCommand(dpy);
 458    if (!opcode)
 459       return None;
 460
 461    glxDraw = malloc(sizeof(*glxDraw));
 462    if (!glxDraw)
 463       return None;
 464
 465    LockDisplay(dpy);
 466    GetReqExtra(GLXCreateWindow, 8 * i, req);
 467    data = (CARD32 *) (req + 1);
 468
 469    req->reqType = opcode;
 470    req->glxCode = glxCode;
 471    req->screen = config->screen;
 472    req->fbconfig = config->fbconfigID;
 473    req->window = drawable;
 474    req->glxwindow = xid = XAllocID(dpy);
 475    req->numAttribs = i;
 476
 477    if (attrib_list)
 478       memcpy(data, attrib_list, 8 * i);
 479
 480    UnlockDisplay(dpy);
 481    SyncHandle();
 482
 483    if (InitGLXDrawable(dpy, glxDraw, drawable, xid)) {
 484       free(glxDraw);
 485       return None;
 486    }
 487
 488    if (!CreateDRIDrawable(dpy, config, drawable, xid, attrib_list, i)) {
 489       if (glxCode == X_GLXCreatePixmap)
 490          glxCode = X_GLXDestroyPixmap;
 491       else
 492          glxCode = X_GLXDestroyWindow;
 493       protocolDestroyDrawable(dpy, xid, glxCode);
 494       xid = None;
 495    }
 496
 497    return xid;
 498 }
 499
 500
 501 /**
 502  * Destroy a non-pbuffer GLX drawable.
 503  */
 504 static void
 505 DestroyDrawable(Display * dpy, GLXDrawable drawable, CARD32 glxCode)
 506 {
 507    if ((dpy == NULL) || (drawable == 0)) {
 508       return;
 509    }
 510
 511    protocolDestroyDrawable(dpy, drawable, glxCode);
 512
 513    DestroyGLXDrawable(dpy, drawable);
 514    DestroyDRIDrawable(dpy, drawable, GL_FALSE);
 515
 516    return;
 517 }
 518
 519
 520 /**
 521  * Create a pbuffer.
 522  *
 523  * This function is used to implement \c glXCreatePbuffer and
 524  * \c glXCreateGLXPbufferSGIX.
 525  *
 526  * \note
 527  * This function dynamically determines whether to use the SGIX_pbuffer
 528  * version of the protocol or the GLX 1.3 version of the protocol.
 529  */
 530 static GLXDrawable
 531 CreatePbuffer(Display * dpy, struct glx_config *config,
 532               unsigned int width, unsigned int height,
 533               const int *attrib_list, GLboolean size_in_attribs)
 534 {
 535    struct glx_display *priv = __glXInitialize(dpy);
 536    GLXDrawable id = 0;
 537    CARD32 *data;
 538    CARD8 opcode;
 539    unsigned int i;
 540    Pixmap pixmap;
 541    GLboolean glx_1_3 = GL_FALSE;
 542
 543    if (priv == NULL)
 544       return None;
 545
 546    i = 0;
 547    if (attrib_list) {
 548       while (attrib_list[i * 2])
 549          i++;
 550    }
 551
 552    opcode = __glXSetupForCommand(dpy);
 553    if (!opcode)
 554       return None;
 555
 556    LockDisplay(dpy);
 557    id = XAllocID(dpy);
 558
 559    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 560       xGLXCreatePbufferReq *req;
 561       unsigned int extra = (size_in_attribs) ? 0 : 2;
 562
 563       glx_1_3 = GL_TRUE;
 564
 565       GetReqExtra(GLXCreatePbuffer, (8 * (i + extra)), req);
 566       data = (CARD32 *) (req + 1);
 567
 568       req->reqType = opcode;
 569       req->glxCode = X_GLXCreatePbuffer;
 570       req->screen = config->screen;
 571       req->fbconfig = config->fbconfigID;
 572       req->pbuffer = id;
 573       req->numAttribs = i + extra;
 574
 575       if (!size_in_attribs) {
 576          data[(2 * i) + 0] = GLX_PBUFFER_WIDTH;
 577          data[(2 * i) + 1] = width;
 578          data[(2 * i) + 2] = GLX_PBUFFER_HEIGHT;
 579          data[(2 * i) + 3] = height;
 580          data += 4;
 581       }
 582    }
 583    else {
 584       xGLXVendorPrivateReq *vpreq;
 585
 586       GetReqExtra(GLXVendorPrivate, 20 + (8 * i), vpreq);
 587       data = (CARD32 *) (vpreq + 1);
 588
 589       vpreq->reqType = opcode;
 590       vpreq->glxCode = X_GLXVendorPrivate;
 591       vpreq->vendorCode = X_GLXvop_CreateGLXPbufferSGIX;
 592
 593       data[0] = config->screen;
 594       data[1] = config->fbconfigID;
 595       data[2] = id;
 596       data[3] = width;
 597       data[4] = height;
 598       data += 5;
 599    }
 600
 601    (void) memcpy(data, attrib_list, sizeof(CARD32) * 2 * i);
 602
 603    UnlockDisplay(dpy);
 604    SyncHandle();
 605
 606    pixmap = XCreatePixmap(dpy, RootWindow(dpy, config->screen),
 607                           width, height, config->rgbBits);
 608
 609    if (!CreateDRIDrawable(dpy, config, pixmap, id, attrib_list, i)) {
 610       CARD32 o = glx_1_3 ? X_GLXDestroyPbuffer : X_GLXvop_DestroyGLXPbufferSGIX;
 611       XFreePixmap(dpy, pixmap);
 612       protocolDestroyDrawable(dpy, id, o);
 613       id = None;
 614    }
 615
 616    return id;
 617 }
 618
 619 /**
 620  * Destroy a pbuffer.
 621  *
 622  * This function is used to implement \c glXDestroyPbuffer and
 623  * \c glXDestroyGLXPbufferSGIX.
 624  *
 625  * \note
 626  * This function dynamically determines whether to use the SGIX_pbuffer
 627  * version of the protocol or the GLX 1.3 version of the protocol.
 628  */
 629 static void
 630 DestroyPbuffer(Display * dpy, GLXDrawable drawable)
 631 {
 632    struct glx_display *priv = __glXInitialize(dpy);
 633    CARD8 opcode;
 634
 635    if ((priv == NULL) || (dpy == NULL) || (drawable == 0)) {
 636       return;
 637    }
 638
 639    opcode = __glXSetupForCommand(dpy);
 640    if (!opcode)
 641       return;
 642
 643    LockDisplay(dpy);
 644
 645    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 646       xGLXDestroyPbufferReq *req;
 647
 648       GetReq(GLXDestroyPbuffer, req);
 649       req->reqType = opcode;
 650       req->glxCode = X_GLXDestroyPbuffer;
 651       req->pbuffer = (GLXPbuffer) drawable;
 652    }
 653    else {
 654       xGLXVendorPrivateWithReplyReq *vpreq;
 655       CARD32 *data;
 656
 657       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 658       data = (CARD32 *) (vpreq + 1);
 659
 660       data[0] = (CARD32) drawable;
 661
 662       vpreq->reqType = opcode;
 663       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 664       vpreq->vendorCode = X_GLXvop_DestroyGLXPbufferSGIX;
 665    }
 666
 667    UnlockDisplay(dpy);
 668    SyncHandle();
 669
 670    DestroyDRIDrawable(dpy, drawable, GL_TRUE);
 671
 672    return;
 673 }
 674
 675 /**
 676  * Create a new pbuffer.
 677  */
 678 _X_EXPORT GLXPbufferSGIX
 679 glXCreateGLXPbufferSGIX(Display * dpy, GLXFBConfigSGIX config,
 680                         unsigned int width, unsigned int height,
 681                         int *attrib_list)
 682 {
 683    return (GLXPbufferSGIX) CreatePbuffer(dpy, (struct glx_config *) config,
 684                                          width, height,
 685                                          attrib_list, GL_FALSE);
 686 }
 687
 688 #endif /* GLX_USE_APPLEGL */
 689
 690 /**
 691  * Create a new pbuffer.
 692  */
 693 _X_EXPORT GLXPbuffer
 694 glXCreatePbuffer(Display * dpy, GLXFBConfig config, const int *attrib_list)
 695 {
 696    int i, width, height;
 697 #ifdef GLX_USE_APPLEGL
 698    GLXPbuffer result;
 699    int errorcode;
 700 #endif
 701
 702    width = 0;
 703    height = 0;
 704
 705    WARN_ONCE_GLX_1_3(dpy, __func__);
 706
 707 #ifdef GLX_USE_APPLEGL
 708    for (i = 0; attrib_list[i]; ++i) {
 709       switch (attrib_list[i]) {
 710       case GLX_PBUFFER_WIDTH:
 711          width = attrib_list[i + 1];
 712          ++i;
 713          break;
 714
 715       case GLX_PBUFFER_HEIGHT:
 716          height = attrib_list[i + 1];
 717          ++i;
 718          break;
 719
 720       case GLX_LARGEST_PBUFFER:
 721          /* This is a hint we should probably handle, but how? */
 722          ++i;
 723          break;
 724
 725       case GLX_PRESERVED_CONTENTS:
 726          /* The contents are always preserved with AppleSGLX with CGL. */
 727          ++i;
 728          break;
 729
 730       default:
 731          return None;
 732       }
 733    }
 734
 735    if (apple_glx_pbuffer_create(dpy, config, width, height, &errorcode,
 736                                 &result)) {
 737       /*
 738        * apple_glx_pbuffer_create only sets the errorcode to core X11
 739        * errors.
 740        */
 741       __glXSendError(dpy, errorcode, 0, X_GLXCreatePbuffer, true);
 742
 743       return None;
 744    }
 745
 746    return result;
 747 #else
 748    for (i = 0; attrib_list[i * 2]; i++) {
 749       switch (attrib_list[i * 2]) {
 750       case GLX_PBUFFER_WIDTH:
 751          width = attrib_list[i * 2 + 1];
 752          break;
 753       case GLX_PBUFFER_HEIGHT:
 754          height = attrib_list[i * 2 + 1];
 755          break;
 756       }
 757    }
 758
 759    return (GLXPbuffer) CreatePbuffer(dpy, (struct glx_config *) config,
 760                                      width, height, attrib_list, GL_TRUE);
 761 #endif
 762 }
 763
 764
 765 /**
 766  * Destroy an existing pbuffer.
 767  */
 768 _X_EXPORT void
 769 glXDestroyPbuffer(Display * dpy, GLXPbuffer pbuf)
 770 {
 771 #ifdef GLX_USE_APPLEGL
 772    if (apple_glx_pbuffer_destroy(dpy, pbuf)) {
 773       __glXSendError(dpy, GLXBadPbuffer, pbuf, X_GLXDestroyPbuffer, false);
 774    }
 775 #else
 776    DestroyPbuffer(dpy, pbuf);
 777 #endif
 778 }
 779
 780
 781 /**
 782  * Query an attribute of a drawable.
 783  */
 784 _X_EXPORT void
 785 glXQueryDrawable(Display * dpy, GLXDrawable drawable,
 786                  int attribute, unsigned int *value)
 787 {
 788    WARN_ONCE_GLX_1_3(dpy, __func__);
 789 #ifdef GLX_USE_APPLEGL
 790    Window root;
 791    int x, y;
 792    unsigned int width, height, bd, depth;
 793
 794    if (apple_glx_pixmap_query(drawable, attribute, value))
 795       return;                   /*done */
 796
 797    if (apple_glx_pbuffer_query(drawable, attribute, value))
 798       return;                   /*done */
 799
 800    /*
 801     * The OpenGL spec states that we should report GLXBadDrawable if
 802     * the drawable is invalid, however doing so would require that we
 803     * use XSetErrorHandler(), which is known to not be thread safe.
 804     * If we use a round-trip call to validate the drawable, there could
 805     * be a race, so instead we just opt in favor of letting the
 806     * XGetGeometry request fail with a GetGeometry request X error
 807     * rather than GLXBadDrawable, in what is hoped to be a rare
 808     * case of an invalid drawable.  In practice most and possibly all
 809     * X11 apps using GLX shouldn't notice a difference.
 810     */
 811    if (XGetGeometry
 812        (dpy, drawable, &root, &x, &y, &width, &height, &bd, &depth)) {
 813       switch (attribute) {
 814       case GLX_WIDTH:
 815          *value = width;
 816          break;
 817
 818       case GLX_HEIGHT:
 819          *value = height;
 820          break;
 821       }
 822    }
 823 #else
 824    GetDrawableAttribute(dpy, drawable, attribute, value);
 825 #endif
 826 }
 827
 828
 829 #ifndef GLX_USE_APPLEGL
 830 /**
 831  * Query an attribute of a pbuffer.
 832  */
 833 _X_EXPORT int
 834 glXQueryGLXPbufferSGIX(Display * dpy, GLXPbufferSGIX drawable,
 835                        int attribute, unsigned int *value)
 836 {
 837    return GetDrawableAttribute(dpy, drawable, attribute, value);
 838 }
 839 #endif
 840
 841 /**
 842  * Select the event mask for a drawable.
 843  */
 844 _X_EXPORT void
 845 glXSelectEvent(Display * dpy, GLXDrawable drawable, unsigned long mask)
 846 {
 847 #ifdef GLX_USE_APPLEGL
 848    XWindowAttributes xwattr;
 849
 850    if (apple_glx_pbuffer_set_event_mask(drawable, mask))
 851       return;                   /*done */
 852
 853    /*
 854     * The spec allows a window, but currently there are no valid
 855     * events for a window, so do nothing.
 856     */
 857    if (XGetWindowAttributes(dpy, drawable, &xwattr))
 858       return;                   /*done */
 859    /* The drawable seems to be invalid.  Report an error. */
 860
 861    __glXSendError(dpy, GLXBadDrawable, drawable,
 862                   X_GLXChangeDrawableAttributes, false);
 863 #else
 864    CARD32 attribs[2];
 865
 866    attribs[0] = (CARD32) GLX_EVENT_MASK;
 867    attribs[1] = (CARD32) mask;
 868
 869    ChangeDrawableAttribute(dpy, drawable, attribs, 1);
 870 #endif
 871 }
 872
 873
 874 /**
 875  * Get the selected event mask for a drawable.
 876  */
 877 _X_EXPORT void
 878 glXGetSelectedEvent(Display * dpy, GLXDrawable drawable, unsigned long *mask)
 879 {
 880 #ifdef GLX_USE_APPLEGL
 881    XWindowAttributes xwattr;
 882
 883    if (apple_glx_pbuffer_get_event_mask(drawable, mask))
 884       return;                   /*done */
 885
 886    /*
 887     * The spec allows a window, but currently there are no valid
 888     * events for a window, so do nothing, but set the mask to 0.
 889     */
 890    if (XGetWindowAttributes(dpy, drawable, &xwattr)) {
 891       /* The window is valid, so set the mask to 0. */
 892       *mask = 0;
 893       return;                   /*done */
 894    }
 895    /* The drawable seems to be invalid.  Report an error. */
 896
 897    __glXSendError(dpy, GLXBadDrawable, drawable, X_GLXGetDrawableAttributes,
 898                   true);
 899 #else
 900    unsigned int value;
 901
 902
 903    /* The non-sense with value is required because on LP64 platforms
 904     * sizeof(unsigned int) != sizeof(unsigned long).  On little-endian
 905     * we could just type-cast the pointer, but why?
 906     */
 907
 908    GetDrawableAttribute(dpy, drawable, GLX_EVENT_MASK_SGIX, &value);
 909    *mask = value;
 910 #endif
 911 }
 912
 913
 914 _X_EXPORT GLXPixmap
 915 glXCreatePixmap(Display * dpy, GLXFBConfig config, Pixmap pixmap,
 916                 const int *attrib_list)
 917 {
 918    WARN_ONCE_GLX_1_3(dpy, __func__);
 919
 920 #ifdef GLX_USE_APPLEGL
 921    const struct glx_config *modes = (const struct glx_config *) config;
 922
 923    if (apple_glx_pixmap_create(dpy, modes->screen, pixmap, modes))
 924       return None;
 925
 926    return pixmap;
 927 #else
 928    return CreateDrawable(dpy, (struct glx_config *) config,
 929                          (Drawable) pixmap, attrib_list, X_GLXCreatePixmap);
 930 #endif
 931 }
 932
 933
 934 _X_EXPORT GLXWindow
 935 glXCreateWindow(Display * dpy, GLXFBConfig config, Window win,
 936                 const int *attrib_list)
 937 {
 938    WARN_ONCE_GLX_1_3(dpy, __func__);
 939 #ifdef GLX_USE_APPLEGL
 940    XWindowAttributes xwattr;
 941    XVisualInfo *visinfo;
 942
 943    (void) attrib_list;          /*unused according to GLX 1.4 */
 944
 945    XGetWindowAttributes(dpy, win, &xwattr);
 946
 947    visinfo = glXGetVisualFromFBConfig(dpy, config);
 948
 949    if (NULL == visinfo) {
 950       __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateWindow, false);
 951       return None;
 952    }
 953
 954    if (visinfo->visualid != XVisualIDFromVisual(xwattr.visual)) {
 955       __glXSendError(dpy, BadMatch, 0, X_GLXCreateWindow, true);
 956       return None;
 957    }
 958
 959    free(visinfo);
 960
 961    return win;
 962 #else
 963    return CreateDrawable(dpy, (struct glx_config *) config,
 964                          (Drawable) win, attrib_list, X_GLXCreateWindow);
 965 #endif
 966 }
 967
 968
 969 _X_EXPORT void
 970 glXDestroyPixmap(Display * dpy, GLXPixmap pixmap)
 971 {
 972    WARN_ONCE_GLX_1_3(dpy, __func__);
 973 #ifdef GLX_USE_APPLEGL
 974    if (apple_glx_pixmap_destroy(dpy, pixmap))
 975       __glXSendError(dpy, GLXBadPixmap, pixmap, X_GLXDestroyPixmap, false);
 976 #else
 977    DestroyDrawable(dpy, (GLXDrawable) pixmap, X_GLXDestroyPixmap);
 978 #endif
 979 }
 980
 981
 982 _X_EXPORT void
 983 glXDestroyWindow(Display * dpy, GLXWindow win)
 984 {
 985    WARN_ONCE_GLX_1_3(dpy, __func__);
 986 #ifndef GLX_USE_APPLEGL
 987    DestroyDrawable(dpy, (GLXDrawable) win, X_GLXDestroyWindow);
 988 #endif
 989 }
 990
 991 #ifndef GLX_USE_APPLEGL
 992 _X_EXPORT
 993 GLX_ALIAS_VOID(glXDestroyGLXPbufferSGIX,
 994                (Display * dpy, GLXPbufferSGIX pbuf),
 995                (dpy, pbuf), glXDestroyPbuffer)
 996
 997 _X_EXPORT
 998 GLX_ALIAS_VOID(glXSelectEventSGIX,
 999                (Display * dpy, GLXDrawable drawable,
1000                 unsigned long mask), (dpy, drawable, mask), glXSelectEvent)
1001
1002 _X_EXPORT
1003 GLX_ALIAS_VOID(glXGetSelectedEventSGIX,
1004                (Display * dpy, GLXDrawable drawable,
1005                 unsigned long *mask), (dpy, drawable, mask),
1006                glXGetSelectedEvent)
1007 #endif