src/glx/glxext.c

   1 /*
   2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. 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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice including the dates of first publication and
  13  * either this permission notice or a reference to
  14  * http://oss.sgi.com/projects/FreeB/
  15  * shall be included in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  26  * shall not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization from
  28  * Silicon Graphics, Inc.
  29  */
  30
  31 /**
  32  * \file glxext.c
  33  * GLX protocol interface boot-strap code.
  34  *
  35  * Direct rendering support added by Precision Insight, Inc.
  36  *
  37  * \author Kevin E. Martin <kevin@precisioninsight.com>
  38  */
  39
  40 #include <assert.h>
  41 #include "glxclient.h"
  42 #include <X11/extensions/Xext.h>
  43 #include <X11/extensions/extutil.h>
  44 #include <X11/extensions/dri2proto.h>
  45 #ifdef GLX_USE_APPLEGL
  46 #include "apple_glx.h"
  47 #include "apple_visual.h"
  48 #endif
  49 #include "glxextensions.h"
  50 #include "glcontextmodes.h"
  51
  52 #ifdef USE_XCB
  53 #include <X11/Xlib-xcb.h>
  54 #include <xcb/xcb.h>
  55 #include <xcb/glx.h>
  56 #endif
  57
  58
  59 #ifdef DEBUG
  60 void __glXDumpDrawBuffer(__GLXcontext * ctx);
  61 #endif
  62
  63 /*
  64 ** You can set this cell to 1 to force the gl drawing stuff to be
  65 ** one command per packet
  66 */
  67 _X_HIDDEN int __glXDebug = 0;
  68
  69 /* Extension required boiler plate */
  70
  71 static const char __glXExtensionName[] = GLX_EXTENSION_NAME;
  72 static __GLXdisplayPrivate *glx_displays;
  73
  74 static /* const */ char *error_list[] = {
  75    "GLXBadContext",
  76    "GLXBadContextState",
  77    "GLXBadDrawable",
  78    "GLXBadPixmap",
  79    "GLXBadContextTag",
  80    "GLXBadCurrentWindow",
  81    "GLXBadRenderRequest",
  82    "GLXBadLargeRequest",
  83    "GLXUnsupportedPrivateRequest",
  84    "GLXBadFBConfig",
  85    "GLXBadPbuffer",
  86    "GLXBadCurrentDrawable",
  87    "GLXBadWindow",
  88 };
  89
  90 #ifdef GLX_USE_APPLEGL
  91 static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
  92                               char *buf, int n);
  93 #endif
  94
  95 static
  96 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
  97                            __GLX_NUMBER_ERRORS, error_list)
  98
  99 static int
 100 __glXCloseDisplay(Display * dpy, XExtCodes * codes);
 101 static Bool
 102 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
 103 static Status
 104 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire);
 105
 106 /*
 107  * GLX events are a bit funky.  We don't stuff the X event code into
 108  * our user exposed (via XNextEvent) structure.  Instead we use the GLX
 109  * private event code namespace (and hope it doesn't conflict).  Clients
 110  * have to know that bit 15 in the event type field means they're getting
 111  * a GLX event, and then handle the various sub-event types there, rather
 112  * than simply checking the event code and handling it directly.
 113  */
 114
 115 static Bool
 116 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
 117 {
 118    __GLXdisplayPrivate *glx_dpy = __glXInitialize(dpy);
 119
 120    if (glx_dpy == NULL)
 121       return False;
 122
 123    switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
 124    case GLX_PbufferClobber:
 125    {
 126       GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
 127       xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
 128       aevent->event_type = awire->type;
 129       aevent->serial = awire->sequenceNumber;
 130       aevent->event_type = awire->event_type;
 131       aevent->draw_type = awire->draw_type;
 132       aevent->drawable = awire->drawable;
 133       aevent->buffer_mask = awire->buffer_mask;
 134       aevent->aux_buffer = awire->aux_buffer;
 135       aevent->x = awire->x;
 136       aevent->y = awire->y;
 137       aevent->width = awire->width;
 138       aevent->height = awire->height;
 139       aevent->count = awire->count;
 140       return True;
 141    }
 142    /* No easy symbol to test for this, as GLX_BufferSwapComplete is
 143     * defined in the local glx.h header, but the
 144     * xGLXBufferSwapComplete typedef is only available in new versions
 145     * of the external glxproto.h header, which doesn't have any
 146     * testable versioning define.
 147     *
 148     * I'll use the related DRI2 define, in the hope that we won't
 149     * receive these events unless we know how to ask for them:
 150     */
 151 #ifdef X_DRI2SwapBuffers
 152    case GLX_BufferSwapComplete:
 153    {
 154       GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
 155       xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
 156       aevent->event_type = awire->event_type;
 157       aevent->drawable = awire->drawable;
 158       aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
 159       aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
 160       aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
 161       return True;
 162    }
 163 #endif
 164    default:
 165       /* client doesn't support server event */
 166       break;
 167    }
 168
 169    return False;
 170 }
 171
 172 /* We don't actually support this.  It doesn't make sense for clients to
 173  * send each other GLX events.
 174  */
 175 static Status
 176 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
 177 {
 178    __GLXdisplayPrivate *glx_dpy = __glXInitialize(dpy);
 179
 180    if (glx_dpy == NULL)
 181       return False;
 182
 183    switch (event->type) {
 184    case GLX_DAMAGED:
 185       break;
 186    case GLX_SAVED:
 187       break;
 188    case GLX_EXCHANGE_COMPLETE_INTEL:
 189       break;
 190    case GLX_COPY_COMPLETE_INTEL:
 191       break;
 192    case GLX_FLIP_COMPLETE_INTEL:
 193       break;
 194    default:
 195       /* client doesn't support server event */
 196       break;
 197    }
 198
 199    return Success;
 200 }
 201
 202 /************************************************************************/
 203 /*
 204 ** Free the per screen configs data as well as the array of
 205 ** __glXScreenConfigs.
 206 */
 207 static void
 208 FreeScreenConfigs(__GLXdisplayPrivate * priv)
 209 {
 210    __GLXscreenConfigs *psc;
 211    GLint i, screens;
 212
 213    /* Free screen configuration information */
 214    screens = ScreenCount(priv->dpy);
 215    for (i = 0; i < screens; i++) {
 216       psc = priv->screenConfigs[i];
 217       if (psc->configs) {
 218          _gl_context_modes_destroy(psc->configs);
 219          if (psc->effectiveGLXexts)
 220             Xfree(psc->effectiveGLXexts);
 221          psc->configs = NULL;   /* NOTE: just for paranoia */
 222       }
 223       if (psc->visuals) {
 224          _gl_context_modes_destroy(psc->visuals);
 225          psc->visuals = NULL;   /* NOTE: just for paranoia */
 226       }
 227       Xfree((char *) psc->serverGLXexts);
 228
 229 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 230       if (psc->driScreen) {
 231          psc->driScreen->destroyScreen(psc);
 232       } else {
 233          Xfree(psc);
 234       }
 235 #else
 236       Xfree(psc);
 237 #endif
 238    }
 239    XFree((char *) priv->screenConfigs);
 240    priv->screenConfigs = NULL;
 241 }
 242
 243 /*
 244 ** Release the private memory referred to in a display private
 245 ** structure.  The caller will free the extension structure.
 246 */
 247 static int
 248 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
 249 {
 250    __GLXdisplayPrivate *priv, **prev;
 251    GLXContext gc;
 252
 253    _XLockMutex(_Xglobal_lock);
 254    prev = &glx_displays;
 255    for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
 256       if (priv->dpy == dpy) {
 257          (*prev)->next = priv->next;
 258          break;
 259       }
 260    }
 261    _XUnlockMutex(_Xglobal_lock);
 262
 263    gc = __glXGetCurrentContext();
 264    if (dpy == gc->currentDpy) {
 265       gc->vtable->destroy(gc);
 266       __glXSetCurrentContextNull();
 267    }
 268
 269    FreeScreenConfigs(priv);
 270    if (priv->serverGLXvendor)
 271       Xfree((char *) priv->serverGLXvendor);
 272    if (priv->serverGLXversion)
 273       Xfree((char *) priv->serverGLXversion);
 274
 275    __glxHashDestroy(priv->drawHash);
 276
 277 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 278    /* Free the direct rendering per display data */
 279    if (priv->driswDisplay)
 280       (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
 281    priv->driswDisplay = NULL;
 282
 283    if (priv->driDisplay)
 284       (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
 285    priv->driDisplay = NULL;
 286
 287    if (priv->dri2Display)
 288       (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
 289    priv->dri2Display = NULL;
 290 #endif
 291
 292    Xfree((char *) priv);
 293
 294    return 1;
 295 }
 296
 297 /*
 298 ** Query the version of the GLX extension.  This procedure works even if
 299 ** the client extension is not completely set up.
 300 */
 301 static Bool
 302 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
 303 {
 304 #ifdef USE_XCB
 305    xcb_connection_t *c = XGetXCBConnection(dpy);
 306    xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
 307                                                                       xcb_glx_query_version
 308                                                                       (c,
 309                                                                        GLX_MAJOR_VERSION,
 310                                                                        GLX_MINOR_VERSION),
 311                                                                       NULL);
 312
 313    if (reply->major_version != GLX_MAJOR_VERSION) {
 314       free(reply);
 315       return GL_FALSE;
 316    }
 317    *major = reply->major_version;
 318    *minor = min(reply->minor_version, GLX_MINOR_VERSION);
 319    free(reply);
 320    return GL_TRUE;
 321 #else
 322    xGLXQueryVersionReq *req;
 323    xGLXQueryVersionReply reply;
 324
 325    /* Send the glXQueryVersion request */
 326    LockDisplay(dpy);
 327    GetReq(GLXQueryVersion, req);
 328    req->reqType = opcode;
 329    req->glxCode = X_GLXQueryVersion;
 330    req->majorVersion = GLX_MAJOR_VERSION;
 331    req->minorVersion = GLX_MINOR_VERSION;
 332    _XReply(dpy, (xReply *) & reply, 0, False);
 333    UnlockDisplay(dpy);
 334    SyncHandle();
 335
 336    if (reply.majorVersion != GLX_MAJOR_VERSION) {
 337       /*
 338        ** The server does not support the same major release as this
 339        ** client.
 340        */
 341       return GL_FALSE;
 342    }
 343    *major = reply.majorVersion;
 344    *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
 345    return GL_TRUE;
 346 #endif /* USE_XCB */
 347 }
 348
 349 /*
 350  * We don't want to enable this GLX_OML_swap_method in glxext.h,
 351  * because we can't support it.  The X server writes it out though,
 352  * so we should handle it somehow, to avoid false warnings.
 353  */
 354 enum {
 355     IGNORE_GLX_SWAP_METHOD_OML = 0x8060
 356 };
 357
 358
 359 /*
 360  * getVisualConfigs uses the !tagged_only path.
 361  * getFBConfigs uses the tagged_only path.
 362  */
 363 _X_HIDDEN void
 364 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
 365                                     const INT32 * bp, Bool tagged_only,
 366                                     Bool fbconfig_style_tags)
 367 {
 368    int i;
 369
 370    if (!tagged_only) {
 371       /* Copy in the first set of properties */
 372       config->visualID = *bp++;
 373
 374       config->visualType = _gl_convert_from_x_visual_type(*bp++);
 375
 376       config->rgbMode = *bp++;
 377
 378       config->redBits = *bp++;
 379       config->greenBits = *bp++;
 380       config->blueBits = *bp++;
 381       config->alphaBits = *bp++;
 382       config->accumRedBits = *bp++;
 383       config->accumGreenBits = *bp++;
 384       config->accumBlueBits = *bp++;
 385       config->accumAlphaBits = *bp++;
 386
 387       config->doubleBufferMode = *bp++;
 388       config->stereoMode = *bp++;
 389
 390       config->rgbBits = *bp++;
 391       config->depthBits = *bp++;
 392       config->stencilBits = *bp++;
 393       config->numAuxBuffers = *bp++;
 394       config->level = *bp++;
 395
 396 #ifdef GLX_USE_APPLEGL
 397        /* AppleSGLX supports pixmap and pbuffers with all config. */
 398        config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
 399        /* Unfortunately this can create an ABI compatibility problem. */
 400        count -= 18;
 401 #else
 402       count -= __GLX_MIN_CONFIG_PROPS;
 403 #endif
 404    }
 405
 406    /*
 407     ** Additional properties may be in a list at the end
 408     ** of the reply.  They are in pairs of property type
 409     ** and property value.
 410     */
 411
 412 #define FETCH_OR_SET(tag) \
 413     config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
 414
 415    for (i = 0; i < count; i += 2) {
 416       long int tag = *bp++;
 417
 418       switch (tag) {
 419       case GLX_RGBA:
 420          FETCH_OR_SET(rgbMode);
 421          break;
 422       case GLX_BUFFER_SIZE:
 423          config->rgbBits = *bp++;
 424          break;
 425       case GLX_LEVEL:
 426          config->level = *bp++;
 427          break;
 428       case GLX_DOUBLEBUFFER:
 429          FETCH_OR_SET(doubleBufferMode);
 430          break;
 431       case GLX_STEREO:
 432          FETCH_OR_SET(stereoMode);
 433          break;
 434       case GLX_AUX_BUFFERS:
 435          config->numAuxBuffers = *bp++;
 436          break;
 437       case GLX_RED_SIZE:
 438          config->redBits = *bp++;
 439          break;
 440       case GLX_GREEN_SIZE:
 441          config->greenBits = *bp++;
 442          break;
 443       case GLX_BLUE_SIZE:
 444          config->blueBits = *bp++;
 445          break;
 446       case GLX_ALPHA_SIZE:
 447          config->alphaBits = *bp++;
 448          break;
 449       case GLX_DEPTH_SIZE:
 450          config->depthBits = *bp++;
 451          break;
 452       case GLX_STENCIL_SIZE:
 453          config->stencilBits = *bp++;
 454          break;
 455       case GLX_ACCUM_RED_SIZE:
 456          config->accumRedBits = *bp++;
 457          break;
 458       case GLX_ACCUM_GREEN_SIZE:
 459          config->accumGreenBits = *bp++;
 460          break;
 461       case GLX_ACCUM_BLUE_SIZE:
 462          config->accumBlueBits = *bp++;
 463          break;
 464       case GLX_ACCUM_ALPHA_SIZE:
 465          config->accumAlphaBits = *bp++;
 466          break;
 467       case GLX_VISUAL_CAVEAT_EXT:
 468          config->visualRating = *bp++;
 469          break;
 470       case GLX_X_VISUAL_TYPE:
 471          config->visualType = *bp++;
 472          break;
 473       case GLX_TRANSPARENT_TYPE:
 474          config->transparentPixel = *bp++;
 475          break;
 476       case GLX_TRANSPARENT_INDEX_VALUE:
 477          config->transparentIndex = *bp++;
 478          break;
 479       case GLX_TRANSPARENT_RED_VALUE:
 480          config->transparentRed = *bp++;
 481          break;
 482       case GLX_TRANSPARENT_GREEN_VALUE:
 483          config->transparentGreen = *bp++;
 484          break;
 485       case GLX_TRANSPARENT_BLUE_VALUE:
 486          config->transparentBlue = *bp++;
 487          break;
 488       case GLX_TRANSPARENT_ALPHA_VALUE:
 489          config->transparentAlpha = *bp++;
 490          break;
 491       case GLX_VISUAL_ID:
 492          config->visualID = *bp++;
 493          break;
 494       case GLX_DRAWABLE_TYPE:
 495          config->drawableType = *bp++;
 496 #ifdef GLX_USE_APPLEGL
 497          /* AppleSGLX supports pixmap and pbuffers with all config. */
 498          config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
 499 #endif
 500          break;
 501       case GLX_RENDER_TYPE:
 502          config->renderType = *bp++;
 503          break;
 504       case GLX_X_RENDERABLE:
 505          config->xRenderable = *bp++;
 506          break;
 507       case GLX_FBCONFIG_ID:
 508          config->fbconfigID = *bp++;
 509          break;
 510       case GLX_MAX_PBUFFER_WIDTH:
 511          config->maxPbufferWidth = *bp++;
 512          break;
 513       case GLX_MAX_PBUFFER_HEIGHT:
 514          config->maxPbufferHeight = *bp++;
 515          break;
 516       case GLX_MAX_PBUFFER_PIXELS:
 517          config->maxPbufferPixels = *bp++;
 518          break;
 519 #ifndef GLX_USE_APPLEGL
 520       case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
 521          config->optimalPbufferWidth = *bp++;
 522          break;
 523       case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
 524          config->optimalPbufferHeight = *bp++;
 525          break;
 526       case GLX_VISUAL_SELECT_GROUP_SGIX:
 527          config->visualSelectGroup = *bp++;
 528          break;
 529       case GLX_SWAP_METHOD_OML:
 530          config->swapMethod = *bp++;
 531          break;
 532 #endif
 533       case GLX_SAMPLE_BUFFERS_SGIS:
 534          config->sampleBuffers = *bp++;
 535          break;
 536       case GLX_SAMPLES_SGIS:
 537          config->samples = *bp++;
 538          break;
 539 #ifdef GLX_USE_APPLEGL
 540       case IGNORE_GLX_SWAP_METHOD_OML:
 541          /* We ignore this tag.  See the comment above this function. */
 542          ++bp;
 543          break;
 544 #else
 545       case GLX_BIND_TO_TEXTURE_RGB_EXT:
 546          config->bindToTextureRgb = *bp++;
 547          break;
 548       case GLX_BIND_TO_TEXTURE_RGBA_EXT:
 549          config->bindToTextureRgba = *bp++;
 550          break;
 551       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
 552          config->bindToMipmapTexture = *bp++;
 553          break;
 554       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
 555          config->bindToTextureTargets = *bp++;
 556          break;
 557       case GLX_Y_INVERTED_EXT:
 558          config->yInverted = *bp++;
 559          break;
 560 #endif
 561       case GLX_USE_GL:
 562          if (fbconfig_style_tags)
 563             bp++;
 564          break;
 565       case None:
 566          i = count;
 567          break;
 568       default:
 569          if(getenv("LIBGL_DIAGNOSTIC")) {
 570              long int tagvalue = *bp++;
 571              fprintf(stderr, "WARNING: unknown GLX tag from server: "
 572                      "tag 0x%lx value 0x%lx\n", tag, tagvalue);
 573          } else {
 574              /* Ignore the unrecognized tag's value */
 575              bp++;
 576          }
 577          break;
 578       }
 579    }
 580
 581    config->renderType =
 582       (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
 583
 584    config->haveAccumBuffer = ((config->accumRedBits +
 585                                config->accumGreenBits +
 586                                config->accumBlueBits +
 587                                config->accumAlphaBits) > 0);
 588    config->haveDepthBuffer = (config->depthBits > 0);
 589    config->haveStencilBuffer = (config->stencilBits > 0);
 590 }
 591
 592 static __GLcontextModes *
 593 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
 594                             int screen, GLboolean tagged_only)
 595 {
 596    INT32 buf[__GLX_TOTAL_CONFIG], *props;
 597    unsigned prop_size;
 598    __GLcontextModes *modes, *m;
 599    int i;
 600
 601    if (nprops == 0)
 602       return NULL;
 603
 604    /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
 605
 606    /* Check number of properties */
 607    if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
 608       return NULL;
 609
 610    /* Allocate memory for our config structure */
 611    modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
 612    if (!modes)
 613       return NULL;
 614
 615    prop_size = nprops * __GLX_SIZE_INT32;
 616    if (prop_size <= sizeof(buf))
 617       props = buf;
 618    else
 619       props = Xmalloc(prop_size);
 620
 621    /* Read each config structure and convert it into our format */
 622    m = modes;
 623    for (i = 0; i < nvisuals; i++) {
 624       _XRead(dpy, (char *) props, prop_size);
 625 #ifdef GLX_USE_APPLEGL
 626        /* Older X servers don't send this so we default it here. */
 627       m->drawableType = GLX_WINDOW_BIT;
 628 #else
 629       /*
 630        * The XQuartz 2.3.2.1 X server doesn't set this properly, so
 631        * set the proper bits here.
 632        * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
 633        */
 634       m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
 635 #endif
 636        __glXInitializeVisualConfigFromTags(m, nprops, props,
 637                                           tagged_only, GL_TRUE);
 638       m->screen = screen;
 639       m = m->next;
 640    }
 641
 642    if (props != buf)
 643       Xfree(props);
 644
 645    return modes;
 646 }
 647
 648 static GLboolean
 649 getVisualConfigs(__GLXscreenConfigs *psc,
 650                  __GLXdisplayPrivate *priv, int screen)
 651 {
 652    xGLXGetVisualConfigsReq *req;
 653    xGLXGetVisualConfigsReply reply;
 654    Display *dpy = priv->dpy;
 655
 656    LockDisplay(dpy);
 657
 658    psc->visuals = NULL;
 659    GetReq(GLXGetVisualConfigs, req);
 660    req->reqType = priv->majorOpcode;
 661    req->glxCode = X_GLXGetVisualConfigs;
 662    req->screen = screen;
 663
 664    if (!_XReply(dpy, (xReply *) & reply, 0, False))
 665       goto out;
 666
 667    psc->visuals = createConfigsFromProperties(dpy,
 668                                               reply.numVisuals,
 669                                               reply.numProps,
 670                                               screen, GL_FALSE);
 671
 672  out:
 673    UnlockDisplay(dpy);
 674    return psc->visuals != NULL;
 675 }
 676
 677 static GLboolean
 678 getFBConfigs(__GLXscreenConfigs *psc, __GLXdisplayPrivate *priv, int screen)
 679 {
 680    xGLXGetFBConfigsReq *fb_req;
 681    xGLXGetFBConfigsSGIXReq *sgi_req;
 682    xGLXVendorPrivateWithReplyReq *vpreq;
 683    xGLXGetFBConfigsReply reply;
 684    Display *dpy = priv->dpy;
 685
 686    psc->serverGLXexts =
 687       __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
 688
 689    LockDisplay(dpy);
 690
 691    psc->configs = NULL;
 692    if (atof(priv->serverGLXversion) >= 1.3) {
 693       GetReq(GLXGetFBConfigs, fb_req);
 694       fb_req->reqType = priv->majorOpcode;
 695       fb_req->glxCode = X_GLXGetFBConfigs;
 696       fb_req->screen = screen;
 697    }
 698    else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
 699       GetReqExtra(GLXVendorPrivateWithReply,
 700                   sz_xGLXGetFBConfigsSGIXReq +
 701                   sz_xGLXVendorPrivateWithReplyReq, vpreq);
 702       sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
 703       sgi_req->reqType = priv->majorOpcode;
 704       sgi_req->glxCode = X_GLXVendorPrivateWithReply;
 705       sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
 706       sgi_req->screen = screen;
 707    }
 708    else
 709       goto out;
 710
 711    if (!_XReply(dpy, (xReply *) & reply, 0, False))
 712       goto out;
 713
 714    psc->configs = createConfigsFromProperties(dpy,
 715                                               reply.numFBConfigs,
 716                                               reply.numAttribs * 2,
 717                                               screen, GL_TRUE);
 718
 719  out:
 720    UnlockDisplay(dpy);
 721    return psc->configs != NULL;
 722 }
 723
 724 _X_HIDDEN Bool
 725 glx_screen_init(__GLXscreenConfigs *psc,
 726                 int screen, __GLXdisplayPrivate * priv)
 727 {
 728    /* Initialize per screen dynamic client GLX extensions */
 729    psc->ext_list_first_time = GL_TRUE;
 730    psc->scr = screen;
 731    psc->dpy = priv->dpy;
 732    psc->display = priv;
 733
 734    getVisualConfigs(psc, priv, screen);
 735    getFBConfigs(psc, priv, screen);
 736
 737    return GL_TRUE;
 738 }
 739
 740 /*
 741 ** Allocate the memory for the per screen configs for each screen.
 742 ** If that works then fetch the per screen configs data.
 743 */
 744 static Bool
 745 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
 746 {
 747    __GLXscreenConfigs *psc;
 748    GLint i, screens;
 749
 750    /*
 751     ** First allocate memory for the array of per screen configs.
 752     */
 753    screens = ScreenCount(dpy);
 754    priv->screenConfigs = Xmalloc(screens * sizeof *priv->screenConfigs);
 755    if (!priv->screenConfigs)
 756       return GL_FALSE;
 757
 758    priv->serverGLXversion =
 759       __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
 760    if (priv->serverGLXversion == NULL) {
 761       FreeScreenConfigs(priv);
 762       return GL_FALSE;
 763    }
 764
 765    for (i = 0; i < screens; i++, psc++) {
 766       psc = NULL;
 767 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 768       if (priv->dri2Display)
 769          psc = (*priv->dri2Display->createScreen) (i, priv);
 770       if (psc == NULL && priv->driDisplay)
 771          psc = (*priv->driDisplay->createScreen) (i, priv);
 772       if (psc == NULL && priv->driswDisplay)
 773          psc = (*priv->driswDisplay->createScreen) (i, priv);
 774 #endif
 775       if (psc == NULL)
 776          psc = indirect_create_screen(i, priv);
 777       priv->screenConfigs[i] = psc;
 778    }
 779    SyncHandle();
 780    return GL_TRUE;
 781 }
 782
 783 /*
 784 ** Initialize the client side extension code.
 785 */
 786 _X_HIDDEN __GLXdisplayPrivate *
 787 __glXInitialize(Display * dpy)
 788 {
 789    __GLXdisplayPrivate *dpyPriv;
 790 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 791    Bool glx_direct, glx_accel;
 792 #endif
 793    int i;
 794
 795    _XLockMutex(_Xglobal_lock);
 796
 797    for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
 798       if (dpyPriv->dpy == dpy) {
 799          _XUnlockMutex(_Xglobal_lock);
 800          return dpyPriv;
 801       }
 802    }
 803
 804    dpyPriv = Xcalloc(1, sizeof *dpyPriv);
 805    if (!dpyPriv)
 806       return NULL;
 807
 808    dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
 809    if (!dpyPriv->codes) {
 810       Xfree(dpyPriv);
 811       _XUnlockMutex(_Xglobal_lock);
 812       return NULL;
 813    }
 814
 815    dpyPriv->dpy = dpy;
 816    dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
 817    dpyPriv->serverGLXvendor = 0x0;
 818    dpyPriv->serverGLXversion = 0x0;
 819
 820    /* See if the versions are compatible */
 821    if (!QueryVersion(dpy, dpyPriv->majorOpcode,
 822                      &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
 823       Xfree(dpyPriv);
 824       _XUnlockMutex(_Xglobal_lock);
 825       return NULL;
 826    }
 827
 828    for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
 829       XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
 830       XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
 831    }
 832
 833    XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
 834    XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
 835
 836 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 837    glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
 838    glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
 839
 840    dpyPriv->drawHash = __glxHashCreate();
 841
 842    /*
 843     ** Initialize the direct rendering per display data and functions.
 844     ** Note: This _must_ be done before calling any other DRI routines
 845     ** (e.g., those called in AllocAndFetchScreenConfigs).
 846     */
 847    if (glx_direct && glx_accel) {
 848       dpyPriv->dri2Display = dri2CreateDisplay(dpy);
 849       dpyPriv->driDisplay = driCreateDisplay(dpy);
 850    }
 851    if (glx_direct)
 852       dpyPriv->driswDisplay = driswCreateDisplay(dpy);
 853 #endif
 854
 855 #ifdef GLX_USE_APPLEGL
 856    if (apple_init_glx(dpy)) {
 857       Xfree(dpyPriv);
 858       return NULL;
 859    }
 860 #endif
 861    if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
 862       Xfree(dpyPriv);
 863       return NULL;
 864    }
 865
 866    if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
 867       __glXClientInfo(dpy, dpyPriv->majorOpcode);
 868
 869    dpyPriv->next = glx_displays;
 870    glx_displays = dpyPriv;
 871
 872     _XUnlockMutex(_Xglobal_lock);
 873
 874    return dpyPriv;
 875 }
 876
 877 /*
 878 ** Setup for sending a GLX command on dpy.  Make sure the extension is
 879 ** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
 880 */
 881 _X_HIDDEN CARD8
 882 __glXSetupForCommand(Display * dpy)
 883 {
 884    GLXContext gc;
 885    __GLXdisplayPrivate *priv;
 886
 887    /* If this thread has a current context, flush its rendering commands */
 888    gc = __glXGetCurrentContext();
 889    if (gc->currentDpy) {
 890       /* Flush rendering buffer of the current context, if any */
 891       (void) __glXFlushRenderBuffer(gc, gc->pc);
 892
 893       if (gc->currentDpy == dpy) {
 894          /* Use opcode from gc because its right */
 895          return gc->majorOpcode;
 896       }
 897       else {
 898          /*
 899           ** Have to get info about argument dpy because it might be to
 900           ** a different server
 901           */
 902       }
 903    }
 904
 905    /* Forced to lookup extension via the slow initialize route */
 906    priv = __glXInitialize(dpy);
 907    if (!priv) {
 908       return 0;
 909    }
 910    return priv->majorOpcode;
 911 }
 912
 913 /**
 914  * Flush the drawing command transport buffer.
 915  *
 916  * \param ctx  Context whose transport buffer is to be flushed.
 917  * \param pc   Pointer to first unused buffer location.
 918  *
 919  * \todo
 920  * Modify this function to use \c ctx->pc instead of the explicit
 921  * \c pc parameter.
 922  */
 923 _X_HIDDEN GLubyte *
 924 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
 925 {
 926    Display *const dpy = ctx->currentDpy;
 927 #ifdef USE_XCB
 928    xcb_connection_t *c = XGetXCBConnection(dpy);
 929 #else
 930    xGLXRenderReq *req;
 931 #endif /* USE_XCB */
 932    const GLint size = pc - ctx->buf;
 933
 934    if ((dpy != NULL) && (size > 0)) {
 935 #ifdef USE_XCB
 936       xcb_glx_render(c, ctx->currentContextTag, size,
 937                      (const uint8_t *) ctx->buf);
 938 #else
 939       /* Send the entire buffer as an X request */
 940       LockDisplay(dpy);
 941       GetReq(GLXRender, req);
 942       req->reqType = ctx->majorOpcode;
 943       req->glxCode = X_GLXRender;
 944       req->contextTag = ctx->currentContextTag;
 945       req->length += (size + 3) >> 2;
 946       _XSend(dpy, (char *) ctx->buf, size);
 947       UnlockDisplay(dpy);
 948       SyncHandle();
 949 #endif
 950    }
 951
 952    /* Reset pointer and return it */
 953    ctx->pc = ctx->buf;
 954    return ctx->pc;
 955 }
 956
 957
 958 /**
 959  * Send a portion of a GLXRenderLarge command to the server.  The advantage of
 960  * this function over \c __glXSendLargeCommand is that callers can use the
 961  * data buffer in the GLX context and may be able to avoid allocating an
 962  * extra buffer.  The disadvantage is the clients will have to do more
 963  * GLX protocol work (i.e., calculating \c totalRequests, etc.).
 964  *
 965  * \sa __glXSendLargeCommand
 966  *
 967  * \param gc             GLX context
 968  * \param requestNumber  Which part of the whole command is this?  The first
 969  *                       request is 1.
 970  * \param totalRequests  How many requests will there be?
 971  * \param data           Command data.
 972  * \param dataLen        Size, in bytes, of the command data.
 973  */
 974 _X_HIDDEN void
 975 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
 976                     GLint totalRequests, const GLvoid * data, GLint dataLen)
 977 {
 978    Display *dpy = gc->currentDpy;
 979 #ifdef USE_XCB
 980    xcb_connection_t *c = XGetXCBConnection(dpy);
 981    xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
 982                         totalRequests, dataLen, data);
 983 #else
 984    xGLXRenderLargeReq *req;
 985
 986    if (requestNumber == 1) {
 987       LockDisplay(dpy);
 988    }
 989
 990    GetReq(GLXRenderLarge, req);
 991    req->reqType = gc->majorOpcode;
 992    req->glxCode = X_GLXRenderLarge;
 993    req->contextTag = gc->currentContextTag;
 994    req->length += (dataLen + 3) >> 2;
 995    req->requestNumber = requestNumber;
 996    req->requestTotal = totalRequests;
 997    req->dataBytes = dataLen;
 998    Data(dpy, data, dataLen);
 999
1000    if (requestNumber == totalRequests) {
1001       UnlockDisplay(dpy);
1002       SyncHandle();
1003    }
1004 #endif /* USE_XCB */
1005 }
1006
1007
1008 /**
1009  * Send a command that is too large for the GLXRender protocol request.
1010  *
1011  * Send a large command, one that is too large for some reason to
1012  * send using the GLXRender protocol request.  One reason to send
1013  * a large command is to avoid copying the data.
1014  *
1015  * \param ctx        GLX context
1016  * \param header     Header data.
1017  * \param headerLen  Size, in bytes, of the header data.  It is assumed that
1018  *                   the header data will always be small enough to fit in
1019  *                   a single X protocol packet.
1020  * \param data       Command data.
1021  * \param dataLen    Size, in bytes, of the command data.
1022  */
1023 _X_HIDDEN void
1024 __glXSendLargeCommand(__GLXcontext * ctx,
1025                       const GLvoid * header, GLint headerLen,
1026                       const GLvoid * data, GLint dataLen)
1027 {
1028    GLint maxSize;
1029    GLint totalRequests, requestNumber;
1030
1031    /*
1032     ** Calculate the maximum amount of data can be stuffed into a single
1033     ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
1034     ** packet size minus sz_xGLXRenderReq.
1035     */
1036    maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1037    totalRequests = 1 + (dataLen / maxSize);
1038    if (dataLen % maxSize)
1039       totalRequests++;
1040
1041    /*
1042     ** Send all of the command, except the large array, as one request.
1043     */
1044    assert(headerLen <= maxSize);
1045    __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1046
1047    /*
1048     ** Send enough requests until the whole array is sent.
1049     */
1050    for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1051         requestNumber++) {
1052       __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1053       data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1054       dataLen -= maxSize;
1055       assert(dataLen > 0);
1056    }
1057
1058    assert(dataLen <= maxSize);
1059    __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1060 }
1061
1062 /************************************************************************/
1063
1064 #ifdef DEBUG
1065 _X_HIDDEN void
1066 __glXDumpDrawBuffer(__GLXcontext * ctx)
1067 {
1068    GLubyte *p = ctx->buf;
1069    GLubyte *end = ctx->pc;
1070    GLushort opcode, length;
1071
1072    while (p < end) {
1073       /* Fetch opcode */
1074       opcode = *((GLushort *) p);
1075       length = *((GLushort *) (p + 2));
1076       printf("%2x: %5d: ", opcode, length);
1077       length -= 4;
1078       p += 4;
1079       while (length > 0) {
1080          printf("%08x ", *((unsigned *) p));
1081          p += 4;
1082          length -= 4;
1083       }
1084       printf("\n");
1085    }
1086 }
1087 #endif