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 int
 276 __glXGetDrawableAttribute(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_context *gc = __glXGetCurrentContext();
 323       struct glx_screen *psc;
 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 (pdraw == NULL || gc == &dummyContext || gc->currentDpy != dpy ||
 332          (gc->currentDrawable != drawable &&
 333          gc->currentReadable != drawable)) {
 334          __glXSendError(dpy, GLXBadDrawable, drawable,
 335                         X_GLXGetDrawableAttributes, false);
 336          return 0;
 337       }
 338
 339       psc = pdraw->psc;
 340
 341       if (psc->driScreen->getBufferAge != NULL)
 342          *value = psc->driScreen->getBufferAge(pdraw);
 343
 344       return 0;
 345    }
 346 #endif
 347
 348    LockDisplay(dpy);
 349
 350    if (use_glx_1_3) {
 351       xGLXGetDrawableAttributesReq *req;
 352
 353       GetReq(GLXGetDrawableAttributes, req);
 354       req->reqType = opcode;
 355       req->glxCode = X_GLXGetDrawableAttributes;
 356       req->drawable = drawable;
 357    }
 358    else {
 359       xGLXVendorPrivateWithReplyReq *vpreq;
 360
 361       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 362       data = (CARD32 *) (vpreq + 1);
 363       data[0] = (CARD32) drawable;
 364
 365       vpreq->reqType = opcode;
 366       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 367       vpreq->vendorCode = X_GLXvop_GetDrawableAttributesSGIX;
 368    }
 369
 370    _XReply(dpy, (xReply *) & reply, 0, False);
 371
 372    if (reply.type == X_Error) {
 373       UnlockDisplay(dpy);
 374       SyncHandle();
 375       return 0;
 376    }
 377
 378    length = reply.length;
 379    if (length) {
 380       num_attributes = (use_glx_1_3) ? reply.numAttribs : length / 2;
 381       data = malloc(length * sizeof(CARD32));
 382       if (data == NULL) {
 383          /* Throw data on the floor */
 384          _XEatData(dpy, length);
 385       }
 386       else {
 387          _XRead(dpy, (char *) data, length * sizeof(CARD32));
 388
 389          /* Search the set of returned attributes for the attribute requested by
 390           * the caller.
 391           */
 392          for (i = 0; i < num_attributes; i++) {
 393             if (data[i * 2] == attribute) {
 394                *value = data[(i * 2) + 1];
 395                break;
 396             }
 397          }
 398
 399 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 400          if (pdraw != NULL) {
 401             if (!pdraw->textureTarget)
 402                pdraw->textureTarget =
 403                   determineTextureTarget((const int *) data, num_attributes);
 404             if (!pdraw->textureFormat)
 405                pdraw->textureFormat =
 406                   determineTextureFormat((const int *) data, num_attributes);
 407          }
 408 #endif
 409
 410          free(data);
 411       }
 412    }
 413
 414    UnlockDisplay(dpy);
 415    SyncHandle();
 416
 417    return 1;
 418 }
 419
 420 static void
 421 protocolDestroyDrawable(Display *dpy, GLXDrawable drawable, CARD32 glxCode)
 422 {
 423    xGLXDestroyPbufferReq *req;
 424    CARD8 opcode;
 425
 426    opcode = __glXSetupForCommand(dpy);
 427    if (!opcode)
 428       return;
 429
 430    LockDisplay(dpy);
 431
 432    GetReq(GLXDestroyPbuffer, req);
 433    req->reqType = opcode;
 434    req->glxCode = glxCode;
 435    req->pbuffer = (GLXPbuffer) drawable;
 436
 437    UnlockDisplay(dpy);
 438    SyncHandle();
 439 }
 440
 441 /**
 442  * Create a non-pbuffer GLX drawable.
 443  */
 444 static GLXDrawable
 445 CreateDrawable(Display *dpy, struct glx_config *config,
 446                Drawable drawable, const int *attrib_list, CARD8 glxCode)
 447 {
 448    xGLXCreateWindowReq *req;
 449    struct glx_drawable *glxDraw;
 450    CARD32 *data;
 451    unsigned int i;
 452    CARD8 opcode;
 453    GLXDrawable xid;
 454
 455    i = 0;
 456    if (attrib_list) {
 457       while (attrib_list[i * 2] != None)
 458          i++;
 459    }
 460
 461    opcode = __glXSetupForCommand(dpy);
 462    if (!opcode)
 463       return None;
 464
 465    glxDraw = malloc(sizeof(*glxDraw));
 466    if (!glxDraw)
 467       return None;
 468
 469    LockDisplay(dpy);
 470    GetReqExtra(GLXCreateWindow, 8 * i, req);
 471    data = (CARD32 *) (req + 1);
 472
 473    req->reqType = opcode;
 474    req->glxCode = glxCode;
 475    req->screen = config->screen;
 476    req->fbconfig = config->fbconfigID;
 477    req->window = drawable;
 478    req->glxwindow = xid = XAllocID(dpy);
 479    req->numAttribs = i;
 480
 481    if (attrib_list)
 482       memcpy(data, attrib_list, 8 * i);
 483
 484    UnlockDisplay(dpy);
 485    SyncHandle();
 486
 487    if (InitGLXDrawable(dpy, glxDraw, drawable, xid)) {
 488       free(glxDraw);
 489       return None;
 490    }
 491
 492    if (!CreateDRIDrawable(dpy, config, drawable, xid, attrib_list, i)) {
 493       if (glxCode == X_GLXCreatePixmap)
 494          glxCode = X_GLXDestroyPixmap;
 495       else
 496          glxCode = X_GLXDestroyWindow;
 497       protocolDestroyDrawable(dpy, xid, glxCode);
 498       xid = None;
 499    }
 500
 501    return xid;
 502 }
 503
 504
 505 /**
 506  * Destroy a non-pbuffer GLX drawable.
 507  */
 508 static void
 509 DestroyDrawable(Display * dpy, GLXDrawable drawable, CARD32 glxCode)
 510 {
 511    if ((dpy == NULL) || (drawable == 0)) {
 512       return;
 513    }
 514
 515    protocolDestroyDrawable(dpy, drawable, glxCode);
 516
 517    DestroyGLXDrawable(dpy, drawable);
 518    DestroyDRIDrawable(dpy, drawable, GL_FALSE);
 519
 520    return;
 521 }
 522
 523
 524 /**
 525  * Create a pbuffer.
 526  *
 527  * This function is used to implement \c glXCreatePbuffer and
 528  * \c glXCreateGLXPbufferSGIX.
 529  *
 530  * \note
 531  * This function dynamically determines whether to use the SGIX_pbuffer
 532  * version of the protocol or the GLX 1.3 version of the protocol.
 533  */
 534 static GLXDrawable
 535 CreatePbuffer(Display * dpy, struct glx_config *config,
 536               unsigned int width, unsigned int height,
 537               const int *attrib_list, GLboolean size_in_attribs)
 538 {
 539    struct glx_display *priv = __glXInitialize(dpy);
 540    GLXDrawable id = 0;
 541    CARD32 *data;
 542    CARD8 opcode;
 543    unsigned int i;
 544    Pixmap pixmap;
 545    GLboolean glx_1_3 = GL_FALSE;
 546
 547    if (priv == NULL)
 548       return None;
 549
 550    i = 0;
 551    if (attrib_list) {
 552       while (attrib_list[i * 2])
 553          i++;
 554    }
 555
 556    opcode = __glXSetupForCommand(dpy);
 557    if (!opcode)
 558       return None;
 559
 560    LockDisplay(dpy);
 561    id = XAllocID(dpy);
 562
 563    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 564       xGLXCreatePbufferReq *req;
 565       unsigned int extra = (size_in_attribs) ? 0 : 2;
 566
 567       glx_1_3 = GL_TRUE;
 568
 569       GetReqExtra(GLXCreatePbuffer, (8 * (i + extra)), req);
 570       data = (CARD32 *) (req + 1);
 571
 572       req->reqType = opcode;
 573       req->glxCode = X_GLXCreatePbuffer;
 574       req->screen = config->screen;
 575       req->fbconfig = config->fbconfigID;
 576       req->pbuffer = id;
 577       req->numAttribs = i + extra;
 578
 579       if (!size_in_attribs) {
 580          data[(2 * i) + 0] = GLX_PBUFFER_WIDTH;
 581          data[(2 * i) + 1] = width;
 582          data[(2 * i) + 2] = GLX_PBUFFER_HEIGHT;
 583          data[(2 * i) + 3] = height;
 584          data += 4;
 585       }
 586    }
 587    else {
 588       xGLXVendorPrivateReq *vpreq;
 589
 590       GetReqExtra(GLXVendorPrivate, 20 + (8 * i), vpreq);
 591       data = (CARD32 *) (vpreq + 1);
 592
 593       vpreq->reqType = opcode;
 594       vpreq->glxCode = X_GLXVendorPrivate;
 595       vpreq->vendorCode = X_GLXvop_CreateGLXPbufferSGIX;
 596
 597       data[0] = config->screen;
 598       data[1] = config->fbconfigID;
 599       data[2] = id;
 600       data[3] = width;
 601       data[4] = height;
 602       data += 5;
 603    }
 604
 605    (void) memcpy(data, attrib_list, sizeof(CARD32) * 2 * i);
 606
 607    UnlockDisplay(dpy);
 608    SyncHandle();
 609
 610    pixmap = XCreatePixmap(dpy, RootWindow(dpy, config->screen),
 611                           width, height, config->rgbBits);
 612
 613    if (!CreateDRIDrawable(dpy, config, pixmap, id, attrib_list, i)) {
 614       CARD32 o = glx_1_3 ? X_GLXDestroyPbuffer : X_GLXvop_DestroyGLXPbufferSGIX;
 615       XFreePixmap(dpy, pixmap);
 616       protocolDestroyDrawable(dpy, id, o);
 617       id = None;
 618    }
 619
 620    return id;
 621 }
 622
 623 /**
 624  * Destroy a pbuffer.
 625  *
 626  * This function is used to implement \c glXDestroyPbuffer and
 627  * \c glXDestroyGLXPbufferSGIX.
 628  *
 629  * \note
 630  * This function dynamically determines whether to use the SGIX_pbuffer
 631  * version of the protocol or the GLX 1.3 version of the protocol.
 632  */
 633 static void
 634 DestroyPbuffer(Display * dpy, GLXDrawable drawable)
 635 {
 636    struct glx_display *priv = __glXInitialize(dpy);
 637    CARD8 opcode;
 638
 639    if ((priv == NULL) || (dpy == NULL) || (drawable == 0)) {
 640       return;
 641    }
 642
 643    opcode = __glXSetupForCommand(dpy);
 644    if (!opcode)
 645       return;
 646
 647    LockDisplay(dpy);
 648
 649    if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
 650       xGLXDestroyPbufferReq *req;
 651
 652       GetReq(GLXDestroyPbuffer, req);
 653       req->reqType = opcode;
 654       req->glxCode = X_GLXDestroyPbuffer;
 655       req->pbuffer = (GLXPbuffer) drawable;
 656    }
 657    else {
 658       xGLXVendorPrivateWithReplyReq *vpreq;
 659       CARD32 *data;
 660
 661       GetReqExtra(GLXVendorPrivateWithReply, 4, vpreq);
 662       data = (CARD32 *) (vpreq + 1);
 663
 664       data[0] = (CARD32) drawable;
 665
 666       vpreq->reqType = opcode;
 667       vpreq->glxCode = X_GLXVendorPrivateWithReply;
 668       vpreq->vendorCode = X_GLXvop_DestroyGLXPbufferSGIX;
 669    }
 670
 671    UnlockDisplay(dpy);
 672    SyncHandle();
 673
 674    DestroyDRIDrawable(dpy, drawable, GL_TRUE);
 675
 676    return;
 677 }
 678
 679 /**
 680  * Create a new pbuffer.
 681  */
 682 _GLX_PUBLIC GLXPbufferSGIX
 683 glXCreateGLXPbufferSGIX(Display * dpy, GLXFBConfigSGIX config,
 684                         unsigned int width, unsigned int height,
 685                         int *attrib_list)
 686 {
 687    return (GLXPbufferSGIX) CreatePbuffer(dpy, (struct glx_config *) config,
 688                                          width, height,
 689                                          attrib_list, GL_FALSE);
 690 }
 691
 692 #endif /* GLX_USE_APPLEGL */
 693
 694 /**
 695  * Create a new pbuffer.
 696  */
 697 _GLX_PUBLIC GLXPbuffer
 698 glXCreatePbuffer(Display * dpy, GLXFBConfig config, const int *attrib_list)
 699 {
 700    int i, width, height;
 701 #ifdef GLX_USE_APPLEGL
 702    GLXPbuffer result;
 703    int errorcode;
 704 #endif
 705
 706    width = 0;
 707    height = 0;
 708
 709    WARN_ONCE_GLX_1_3(dpy, __func__);
 710
 711 #ifdef GLX_USE_APPLEGL
 712    for (i = 0; attrib_list[i]; ++i) {
 713       switch (attrib_list[i]) {
 714       case GLX_PBUFFER_WIDTH:
 715          width = attrib_list[i + 1];
 716          ++i;
 717          break;
 718
 719       case GLX_PBUFFER_HEIGHT:
 720          height = attrib_list[i + 1];
 721          ++i;
 722          break;
 723
 724       case GLX_LARGEST_PBUFFER:
 725          /* This is a hint we should probably handle, but how? */
 726          ++i;
 727          break;
 728
 729       case GLX_PRESERVED_CONTENTS:
 730          /* The contents are always preserved with AppleSGLX with CGL. */
 731          ++i;
 732          break;
 733
 734       default:
 735          return None;
 736       }
 737    }
 738
 739    if (apple_glx_pbuffer_create(dpy, config, width, height, &errorcode,
 740                                 &result)) {
 741       /*
 742        * apple_glx_pbuffer_create only sets the errorcode to core X11
 743        * errors.
 744        */
 745       __glXSendError(dpy, errorcode, 0, X_GLXCreatePbuffer, true);
 746
 747       return None;
 748    }
 749
 750    return result;
 751 #else
 752    for (i = 0; attrib_list[i * 2]; i++) {
 753       switch (attrib_list[i * 2]) {
 754       case GLX_PBUFFER_WIDTH:
 755          width = attrib_list[i * 2 + 1];
 756          break;
 757       case GLX_PBUFFER_HEIGHT:
 758          height = attrib_list[i * 2 + 1];
 759          break;
 760       }
 761    }
 762
 763    return (GLXPbuffer) CreatePbuffer(dpy, (struct glx_config *) config,
 764                                      width, height, attrib_list, GL_TRUE);
 765 #endif
 766 }
 767
 768
 769 /**
 770  * Destroy an existing pbuffer.
 771  */
 772 _GLX_PUBLIC void
 773 glXDestroyPbuffer(Display * dpy, GLXPbuffer pbuf)
 774 {
 775 #ifdef GLX_USE_APPLEGL
 776    if (apple_glx_pbuffer_destroy(dpy, pbuf)) {
 777       __glXSendError(dpy, GLXBadPbuffer, pbuf, X_GLXDestroyPbuffer, false);
 778    }
 779 #else
 780    DestroyPbuffer(dpy, pbuf);
 781 #endif
 782 }
 783
 784
 785 /**
 786  * Query an attribute of a drawable.
 787  */
 788 _GLX_PUBLIC void
 789 glXQueryDrawable(Display * dpy, GLXDrawable drawable,
 790                  int attribute, unsigned int *value)
 791 {
 792    WARN_ONCE_GLX_1_3(dpy, __func__);
 793 #ifdef GLX_USE_APPLEGL
 794    Window root;
 795    int x, y;
 796    unsigned int width, height, bd, depth;
 797
 798    if (apple_glx_pixmap_query(drawable, attribute, value))
 799       return;                   /*done */
 800
 801    if (apple_glx_pbuffer_query(drawable, attribute, value))
 802       return;                   /*done */
 803
 804    /*
 805     * The OpenGL spec states that we should report GLXBadDrawable if
 806     * the drawable is invalid, however doing so would require that we
 807     * use XSetErrorHandler(), which is known to not be thread safe.
 808     * If we use a round-trip call to validate the drawable, there could
 809     * be a race, so instead we just opt in favor of letting the
 810     * XGetGeometry request fail with a GetGeometry request X error
 811     * rather than GLXBadDrawable, in what is hoped to be a rare
 812     * case of an invalid drawable.  In practice most and possibly all
 813     * X11 apps using GLX shouldn't notice a difference.
 814     */
 815    if (XGetGeometry
 816        (dpy, drawable, &root, &x, &y, &width, &height, &bd, &depth)) {
 817       switch (attribute) {
 818       case GLX_WIDTH:
 819          *value = width;
 820          break;
 821
 822       case GLX_HEIGHT:
 823          *value = height;
 824          break;
 825       }
 826    }
 827 #else
 828    __glXGetDrawableAttribute(dpy, drawable, attribute, value);
 829 #endif
 830 }
 831
 832
 833 #ifndef GLX_USE_APPLEGL
 834 /**
 835  * Query an attribute of a pbuffer.
 836  */
 837 _GLX_PUBLIC void
 838 glXQueryGLXPbufferSGIX(Display * dpy, GLXPbufferSGIX drawable,
 839                        int attribute, unsigned int *value)
 840 {
 841    __glXGetDrawableAttribute(dpy, drawable, attribute, value);
 842 }
 843 #endif
 844
 845 /**
 846  * Select the event mask for a drawable.
 847  */
 848 _GLX_PUBLIC void
 849 glXSelectEvent(Display * dpy, GLXDrawable drawable, unsigned long mask)
 850 {
 851 #ifdef GLX_USE_APPLEGL
 852    XWindowAttributes xwattr;
 853
 854    if (apple_glx_pbuffer_set_event_mask(drawable, mask))
 855       return;                   /*done */
 856
 857    /*
 858     * The spec allows a window, but currently there are no valid
 859     * events for a window, so do nothing.
 860     */
 861    if (XGetWindowAttributes(dpy, drawable, &xwattr))
 862       return;                   /*done */
 863    /* The drawable seems to be invalid.  Report an error. */
 864
 865    __glXSendError(dpy, GLXBadDrawable, drawable,
 866                   X_GLXChangeDrawableAttributes, false);
 867 #else
 868    CARD32 attribs[2];
 869
 870    attribs[0] = (CARD32) GLX_EVENT_MASK;
 871    attribs[1] = (CARD32) mask;
 872
 873    ChangeDrawableAttribute(dpy, drawable, attribs, 1);
 874 #endif
 875 }
 876
 877
 878 /**
 879  * Get the selected event mask for a drawable.
 880  */
 881 _GLX_PUBLIC void
 882 glXGetSelectedEvent(Display * dpy, GLXDrawable drawable, unsigned long *mask)
 883 {
 884 #ifdef GLX_USE_APPLEGL
 885    XWindowAttributes xwattr;
 886
 887    if (apple_glx_pbuffer_get_event_mask(drawable, mask))
 888       return;                   /*done */
 889
 890    /*
 891     * The spec allows a window, but currently there are no valid
 892     * events for a window, so do nothing, but set the mask to 0.
 893     */
 894    if (XGetWindowAttributes(dpy, drawable, &xwattr)) {
 895       /* The window is valid, so set the mask to 0. */
 896       *mask = 0;
 897       return;                   /*done */
 898    }
 899    /* The drawable seems to be invalid.  Report an error. */
 900
 901    __glXSendError(dpy, GLXBadDrawable, drawable, X_GLXGetDrawableAttributes,
 902                   true);
 903 #else
 904    unsigned int value = 0;
 905
 906
 907    /* The non-sense with value is required because on LP64 platforms
 908     * sizeof(unsigned int) != sizeof(unsigned long).  On little-endian
 909     * we could just type-cast the pointer, but why?
 910     */
 911
 912    __glXGetDrawableAttribute(dpy, drawable, GLX_EVENT_MASK_SGIX, &value);
 913    *mask = value;
 914 #endif
 915 }
 916
 917
 918 _GLX_PUBLIC GLXPixmap
 919 glXCreatePixmap(Display * dpy, GLXFBConfig config, Pixmap pixmap,
 920                 const int *attrib_list)
 921 {
 922    WARN_ONCE_GLX_1_3(dpy, __func__);
 923
 924 #ifdef GLX_USE_APPLEGL
 925    const struct glx_config *modes = (const struct glx_config *) config;
 926
 927    if (apple_glx_pixmap_create(dpy, modes->screen, pixmap, modes))
 928       return None;
 929
 930    return pixmap;
 931 #else
 932    return CreateDrawable(dpy, (struct glx_config *) config,
 933                          (Drawable) pixmap, attrib_list, X_GLXCreatePixmap);
 934 #endif
 935 }
 936
 937
 938 _GLX_PUBLIC GLXWindow
 939 glXCreateWindow(Display * dpy, GLXFBConfig config, Window win,
 940                 const int *attrib_list)
 941 {
 942    WARN_ONCE_GLX_1_3(dpy, __func__);
 943 #ifdef GLX_USE_APPLEGL
 944    XWindowAttributes xwattr;
 945    XVisualInfo *visinfo;
 946
 947    (void) attrib_list;          /*unused according to GLX 1.4 */
 948
 949    XGetWindowAttributes(dpy, win, &xwattr);
 950
 951    visinfo = glXGetVisualFromFBConfig(dpy, config);
 952
 953    if (NULL == visinfo) {
 954       __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateWindow, false);
 955       return None;
 956    }
 957
 958    if (visinfo->visualid != XVisualIDFromVisual(xwattr.visual)) {
 959       __glXSendError(dpy, BadMatch, 0, X_GLXCreateWindow, true);
 960       return None;
 961    }
 962
 963    free(visinfo);
 964
 965    return win;
 966 #else
 967    return CreateDrawable(dpy, (struct glx_config *) config,
 968                          (Drawable) win, attrib_list, X_GLXCreateWindow);
 969 #endif
 970 }
 971
 972
 973 _GLX_PUBLIC void
 974 glXDestroyPixmap(Display * dpy, GLXPixmap pixmap)
 975 {
 976    WARN_ONCE_GLX_1_3(dpy, __func__);
 977 #ifdef GLX_USE_APPLEGL
 978    if (apple_glx_pixmap_destroy(dpy, pixmap))
 979       __glXSendError(dpy, GLXBadPixmap, pixmap, X_GLXDestroyPixmap, false);
 980 #else
 981    DestroyDrawable(dpy, (GLXDrawable) pixmap, X_GLXDestroyPixmap);
 982 #endif
 983 }
 984
 985
 986 _GLX_PUBLIC void
 987 glXDestroyWindow(Display * dpy, GLXWindow win)
 988 {
 989    WARN_ONCE_GLX_1_3(dpy, __func__);
 990 #ifndef GLX_USE_APPLEGL
 991    DestroyDrawable(dpy, (GLXDrawable) win, X_GLXDestroyWindow);
 992 #endif
 993 }
 994
 995 _GLX_PUBLIC
 996 GLX_ALIAS_VOID(glXDestroyGLXPbufferSGIX,
 997                (Display * dpy, GLXPbufferSGIX pbuf),
 998                (dpy, pbuf), glXDestroyPbuffer)
 999
1000 _GLX_PUBLIC
1001 GLX_ALIAS_VOID(glXSelectEventSGIX,
1002                (Display * dpy, GLXDrawable drawable,
1003                 unsigned long mask), (dpy, drawable, mask), glXSelectEvent)
1004
1005 _GLX_PUBLIC
1006 GLX_ALIAS_VOID(glXGetSelectedEventSGIX,
1007                (Display * dpy, GLXDrawable drawable,
1008                 unsigned long *mask), (dpy, drawable, mask),
1009                glXGetSelectedEvent)