src/glx/x11/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 "glxextensions.h"
  45 #include "glcontextmodes.h"
  46
  47 #ifdef USE_XCB
  48 #include <X11/Xlib-xcb.h>
  49 #include <xcb/xcb.h>
  50 #include <xcb/glx.h>
  51 #endif
  52
  53
  54 #ifdef DEBUG
  55 void __glXDumpDrawBuffer(__GLXcontext * ctx);
  56 #endif
  57
  58 /*
  59 ** You can set this cell to 1 to force the gl drawing stuff to be
  60 ** one command per packet
  61 */
  62 _X_HIDDEN int __glXDebug = 0;
  63
  64 /* Extension required boiler plate */
  65
  66 static char *__glXExtensionName = GLX_EXTENSION_NAME;
  67 XExtensionInfo *__glXExtensionInfo = NULL;
  68
  69 static /* const */ char *error_list[] = {
  70    "GLXBadContext",
  71    "GLXBadContextState",
  72    "GLXBadDrawable",
  73    "GLXBadPixmap",
  74    "GLXBadContextTag",
  75    "GLXBadCurrentWindow",
  76    "GLXBadRenderRequest",
  77    "GLXBadLargeRequest",
  78    "GLXUnsupportedPrivateRequest",
  79    "GLXBadFBConfig",
  80    "GLXBadPbuffer",
  81    "GLXBadCurrentDrawable",
  82    "GLXBadWindow",
  83 };
  84
  85 static int
  86 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
  87 {
  88    GLXContext gc;
  89
  90    gc = __glXGetCurrentContext();
  91    if (dpy == gc->currentDpy) {
  92       __glXSetCurrentContextNull();
  93       __glXFreeContext(gc);
  94    }
  95
  96    return XextRemoveDisplay(__glXExtensionInfo, dpy);
  97 }
  98
  99
 100 static
 101 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
 102                            __GLX_NUMBER_ERRORS, error_list)
 103 static Bool
 104 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
 105 static Status
 106 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire);
 107
 108 static /* const */ XExtensionHooks __glXExtensionHooks = {
 109   NULL,                   /* create_gc */
 110   NULL,                   /* copy_gc */
 111   NULL,                   /* flush_gc */
 112   NULL,                   /* free_gc */
 113   NULL,                   /* create_font */
 114   NULL,                   /* free_font */
 115   __glXCloseDisplay,      /* close_display */
 116   __glXWireToEvent,       /* wire_to_event */
 117   __glXEventToWire,       /* event_to_wire */
 118   NULL,                   /* error */
 119   __glXErrorString,       /* error_string */
 120 };
 121
 122 XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo,
 123                            __glXExtensionName, &__glXExtensionHooks,
 124                            __GLX_NUMBER_EVENTS, NULL)
 125
 126 /*
 127  * GLX events are a bit funky.  We don't stuff the X event code into
 128  * our user exposed (via XNextEvent) structure.  Instead we use the GLX
 129  * private event code namespace (and hope it doesn't conflict).  Clients
 130  * have to know that bit 15 in the event type field means they're getting
 131  * a GLX event, and then handle the various sub-event types there, rather
 132  * than simply checking the event code and handling it directly.
 133  */
 134
 135 static Bool
 136 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
 137 {
 138    XExtDisplayInfo *info = __glXFindDisplay(dpy);
 139
 140    XextCheckExtension(dpy, info, __glXExtensionName, False);
 141
 142    switch ((wire->u.u.type & 0x7f) - info->codes->first_event) {
 143    case GLX_PbufferClobber:
 144    {
 145       GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
 146       xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
 147       aevent->event_type = awire->type;
 148       aevent->serial = awire->sequenceNumber;
 149       aevent->event_type = awire->event_type;
 150       aevent->draw_type = awire->draw_type;
 151       aevent->drawable = awire->drawable;
 152       aevent->buffer_mask = awire->buffer_mask;
 153       aevent->aux_buffer = awire->aux_buffer;
 154       aevent->x = awire->x;
 155       aevent->y = awire->y;
 156       aevent->width = awire->width;
 157       aevent->height = awire->height;
 158       aevent->count = awire->count;
 159       return True;
 160    }
 161    /* No easy symbol to test for this, as GLX_BufferSwapComplete is
 162     * defined in the local glx.h header, but the
 163     * xGLXBufferSwapComplete typedef is only available in new versions
 164     * of the external glxproto.h header, which doesn't have any
 165     * testable versioning define.
 166     *
 167     * I'll use the related DRI2 define, in the hope that we won't
 168     * receive these events unless we know how to ask for them:
 169     */
 170 #ifdef X_DRI2SwapBuffers
 171    case GLX_BufferSwapComplete:
 172    {
 173       GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
 174       xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
 175       aevent->event_type = awire->event_type;
 176       aevent->drawable = awire->drawable;
 177       aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
 178       aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
 179       aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
 180       return True;
 181    }
 182 #endif
 183    default:
 184       /* client doesn't support server event */
 185       break;
 186    }
 187
 188    return False;
 189 }
 190
 191 /* We don't actually support this.  It doesn't make sense for clients to
 192  * send each other GLX events.
 193  */
 194 static Status
 195 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
 196 {
 197    XExtDisplayInfo *info = __glXFindDisplay(dpy);
 198
 199    XextCheckExtension(dpy, info, __glXExtensionName, False);
 200
 201    switch (event->type) {
 202    case GLX_DAMAGED:
 203       break;
 204    case GLX_SAVED:
 205       break;
 206    case GLX_EXCHANGE_COMPLETE_INTEL:
 207       break;
 208    case GLX_BLIT_COMPLETE_INTEL:
 209       break;
 210    case GLX_FLIP_COMPLETE_INTEL:
 211       break;
 212    default:
 213       /* client doesn't support server event */
 214       break;
 215    }
 216
 217    return Success;
 218 }
 219
 220 /************************************************************************/
 221 /*
 222 ** Free the per screen configs data as well as the array of
 223 ** __glXScreenConfigs.
 224 */
 225 static void
 226 FreeScreenConfigs(__GLXdisplayPrivate * priv)
 227 {
 228    __GLXscreenConfigs *psc;
 229    GLint i, screens;
 230
 231    /* Free screen configuration information */
 232    psc = priv->screenConfigs;
 233    screens = ScreenCount(priv->dpy);
 234    for (i = 0; i < screens; i++, psc++) {
 235       if (psc->configs) {
 236          _gl_context_modes_destroy(psc->configs);
 237          if (psc->effectiveGLXexts)
 238             Xfree(psc->effectiveGLXexts);
 239          psc->configs = NULL;   /* NOTE: just for paranoia */
 240       }
 241       if (psc->visuals) {
 242          _gl_context_modes_destroy(psc->visuals);
 243          psc->visuals = NULL;   /* NOTE: just for paranoia */
 244       }
 245       Xfree((char *) psc->serverGLXexts);
 246
 247 #ifdef GLX_DIRECT_RENDERING
 248       if (psc->driver_configs) {
 249          unsigned int j;
 250          for (j = 0; psc->driver_configs[j]; j++)
 251             free((__DRIconfig *) psc->driver_configs[j]);
 252          free(psc->driver_configs);
 253          psc->driver_configs = NULL;
 254       }
 255       if (psc->driScreen) {
 256          psc->driScreen->destroyScreen(psc);
 257          __glxHashDestroy(psc->drawHash);
 258          XFree(psc->driScreen);
 259          psc->driScreen = NULL;
 260       }
 261 #endif
 262    }
 263    XFree((char *) priv->screenConfigs);
 264    priv->screenConfigs = NULL;
 265 }
 266
 267 /*
 268 ** Release the private memory referred to in a display private
 269 ** structure.  The caller will free the extension structure.
 270 */
 271 static int
 272 __glXFreeDisplayPrivate(XExtData * extension)
 273 {
 274    __GLXdisplayPrivate *priv;
 275
 276    priv = (__GLXdisplayPrivate *) extension->private_data;
 277    FreeScreenConfigs(priv);
 278    if (priv->serverGLXvendor) {
 279       Xfree((char *) priv->serverGLXvendor);
 280       priv->serverGLXvendor = 0x0;      /* to protect against double free's */
 281    }
 282    if (priv->serverGLXversion) {
 283       Xfree((char *) priv->serverGLXversion);
 284       priv->serverGLXversion = 0x0;     /* to protect against double free's */
 285    }
 286
 287 #ifdef GLX_DIRECT_RENDERING
 288    /* Free the direct rendering per display data */
 289    if (priv->driswDisplay)
 290       (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
 291    priv->driswDisplay = NULL;
 292
 293    if (priv->driDisplay)
 294       (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
 295    priv->driDisplay = NULL;
 296
 297    if (priv->dri2Display)
 298       (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
 299    priv->dri2Display = NULL;
 300 #endif
 301
 302    Xfree((char *) priv);
 303    return 0;
 304 }
 305
 306 /************************************************************************/
 307
 308 /*
 309 ** Query the version of the GLX extension.  This procedure works even if
 310 ** the client extension is not completely set up.
 311 */
 312 static Bool
 313 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
 314 {
 315 #ifdef USE_XCB
 316    xcb_connection_t *c = XGetXCBConnection(dpy);
 317    xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
 318                                                                       xcb_glx_query_version
 319                                                                       (c,
 320                                                                        GLX_MAJOR_VERSION,
 321                                                                        GLX_MINOR_VERSION),
 322                                                                       NULL);
 323
 324    if (reply->major_version != GLX_MAJOR_VERSION) {
 325       free(reply);
 326       return GL_FALSE;
 327    }
 328    *major = reply->major_version;
 329    *minor = min(reply->minor_version, GLX_MINOR_VERSION);
 330    free(reply);
 331    return GL_TRUE;
 332 #else
 333    xGLXQueryVersionReq *req;
 334    xGLXQueryVersionReply reply;
 335
 336    /* Send the glXQueryVersion request */
 337    LockDisplay(dpy);
 338    GetReq(GLXQueryVersion, req);
 339    req->reqType = opcode;
 340    req->glxCode = X_GLXQueryVersion;
 341    req->majorVersion = GLX_MAJOR_VERSION;
 342    req->minorVersion = GLX_MINOR_VERSION;
 343    _XReply(dpy, (xReply *) & reply, 0, False);
 344    UnlockDisplay(dpy);
 345    SyncHandle();
 346
 347    if (reply.majorVersion != GLX_MAJOR_VERSION) {
 348       /*
 349        ** The server does not support the same major release as this
 350        ** client.
 351        */
 352       return GL_FALSE;
 353    }
 354    *major = reply.majorVersion;
 355    *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
 356    return GL_TRUE;
 357 #endif /* USE_XCB */
 358 }
 359
 360
 361 _X_HIDDEN void
 362 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
 363                                     const INT32 * bp, Bool tagged_only,
 364                                     Bool fbconfig_style_tags)
 365 {
 366    int i;
 367
 368    if (!tagged_only) {
 369       /* Copy in the first set of properties */
 370       config->visualID = *bp++;
 371
 372       config->visualType = _gl_convert_from_x_visual_type(*bp++);
 373
 374       config->rgbMode = *bp++;
 375
 376       config->redBits = *bp++;
 377       config->greenBits = *bp++;
 378       config->blueBits = *bp++;
 379       config->alphaBits = *bp++;
 380       config->accumRedBits = *bp++;
 381       config->accumGreenBits = *bp++;
 382       config->accumBlueBits = *bp++;
 383       config->accumAlphaBits = *bp++;
 384
 385       config->doubleBufferMode = *bp++;
 386       config->stereoMode = *bp++;
 387
 388       config->rgbBits = *bp++;
 389       config->depthBits = *bp++;
 390       config->stencilBits = *bp++;
 391       config->numAuxBuffers = *bp++;
 392       config->level = *bp++;
 393
 394       count -= __GLX_MIN_CONFIG_PROPS;
 395    }
 396
 397    /*
 398     ** Additional properties may be in a list at the end
 399     ** of the reply.  They are in pairs of property type
 400     ** and property value.
 401     */
 402
 403 #define FETCH_OR_SET(tag) \
 404     config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
 405
 406    for (i = 0; i < count; i += 2) {
 407       switch (*bp++) {
 408       case GLX_RGBA:
 409          FETCH_OR_SET(rgbMode);
 410          break;
 411       case GLX_BUFFER_SIZE:
 412          config->rgbBits = *bp++;
 413          break;
 414       case GLX_LEVEL:
 415          config->level = *bp++;
 416          break;
 417       case GLX_DOUBLEBUFFER:
 418          FETCH_OR_SET(doubleBufferMode);
 419          break;
 420       case GLX_STEREO:
 421          FETCH_OR_SET(stereoMode);
 422          break;
 423       case GLX_AUX_BUFFERS:
 424          config->numAuxBuffers = *bp++;
 425          break;
 426       case GLX_RED_SIZE:
 427          config->redBits = *bp++;
 428          break;
 429       case GLX_GREEN_SIZE:
 430          config->greenBits = *bp++;
 431          break;
 432       case GLX_BLUE_SIZE:
 433          config->blueBits = *bp++;
 434          break;
 435       case GLX_ALPHA_SIZE:
 436          config->alphaBits = *bp++;
 437          break;
 438       case GLX_DEPTH_SIZE:
 439          config->depthBits = *bp++;
 440          break;
 441       case GLX_STENCIL_SIZE:
 442          config->stencilBits = *bp++;
 443          break;
 444       case GLX_ACCUM_RED_SIZE:
 445          config->accumRedBits = *bp++;
 446          break;
 447       case GLX_ACCUM_GREEN_SIZE:
 448          config->accumGreenBits = *bp++;
 449          break;
 450       case GLX_ACCUM_BLUE_SIZE:
 451          config->accumBlueBits = *bp++;
 452          break;
 453       case GLX_ACCUM_ALPHA_SIZE:
 454          config->accumAlphaBits = *bp++;
 455          break;
 456       case GLX_VISUAL_CAVEAT_EXT:
 457          config->visualRating = *bp++;
 458          break;
 459       case GLX_X_VISUAL_TYPE:
 460          config->visualType = *bp++;
 461          break;
 462       case GLX_TRANSPARENT_TYPE:
 463          config->transparentPixel = *bp++;
 464          break;
 465       case GLX_TRANSPARENT_INDEX_VALUE:
 466          config->transparentIndex = *bp++;
 467          break;
 468       case GLX_TRANSPARENT_RED_VALUE:
 469          config->transparentRed = *bp++;
 470          break;
 471       case GLX_TRANSPARENT_GREEN_VALUE:
 472          config->transparentGreen = *bp++;
 473          break;
 474       case GLX_TRANSPARENT_BLUE_VALUE:
 475          config->transparentBlue = *bp++;
 476          break;
 477       case GLX_TRANSPARENT_ALPHA_VALUE:
 478          config->transparentAlpha = *bp++;
 479          break;
 480       case GLX_VISUAL_ID:
 481          config->visualID = *bp++;
 482          break;
 483       case GLX_DRAWABLE_TYPE:
 484          config->drawableType = *bp++;
 485          break;
 486       case GLX_RENDER_TYPE:
 487          config->renderType = *bp++;
 488          break;
 489       case GLX_X_RENDERABLE:
 490          config->xRenderable = *bp++;
 491          break;
 492       case GLX_FBCONFIG_ID:
 493          config->fbconfigID = *bp++;
 494          break;
 495       case GLX_MAX_PBUFFER_WIDTH:
 496          config->maxPbufferWidth = *bp++;
 497          break;
 498       case GLX_MAX_PBUFFER_HEIGHT:
 499          config->maxPbufferHeight = *bp++;
 500          break;
 501       case GLX_MAX_PBUFFER_PIXELS:
 502          config->maxPbufferPixels = *bp++;
 503          break;
 504       case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
 505          config->optimalPbufferWidth = *bp++;
 506          break;
 507       case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
 508          config->optimalPbufferHeight = *bp++;
 509          break;
 510       case GLX_VISUAL_SELECT_GROUP_SGIX:
 511          config->visualSelectGroup = *bp++;
 512          break;
 513       case GLX_SWAP_METHOD_OML:
 514          config->swapMethod = *bp++;
 515          break;
 516       case GLX_SAMPLE_BUFFERS_SGIS:
 517          config->sampleBuffers = *bp++;
 518          break;
 519       case GLX_SAMPLES_SGIS:
 520          config->samples = *bp++;
 521          break;
 522       case GLX_BIND_TO_TEXTURE_RGB_EXT:
 523          config->bindToTextureRgb = *bp++;
 524          break;
 525       case GLX_BIND_TO_TEXTURE_RGBA_EXT:
 526          config->bindToTextureRgba = *bp++;
 527          break;
 528       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
 529          config->bindToMipmapTexture = *bp++;
 530          break;
 531       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
 532          config->bindToTextureTargets = *bp++;
 533          break;
 534       case GLX_Y_INVERTED_EXT:
 535          config->yInverted = *bp++;
 536          break;
 537       case None:
 538          i = count;
 539          break;
 540       default:
 541          break;
 542       }
 543    }
 544
 545    config->renderType =
 546       (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
 547
 548    config->haveAccumBuffer = ((config->accumRedBits +
 549                                config->accumGreenBits +
 550                                config->accumBlueBits +
 551                                config->accumAlphaBits) > 0);
 552    config->haveDepthBuffer = (config->depthBits > 0);
 553    config->haveStencilBuffer = (config->stencilBits > 0);
 554 }
 555
 556 static __GLcontextModes *
 557 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
 558                             int screen, GLboolean tagged_only)
 559 {
 560    INT32 buf[__GLX_TOTAL_CONFIG], *props;
 561    unsigned prop_size;
 562    __GLcontextModes *modes, *m;
 563    int i;
 564
 565    if (nprops == 0)
 566       return NULL;
 567
 568    /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
 569
 570    /* Check number of properties */
 571    if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
 572       return NULL;
 573
 574    /* Allocate memory for our config structure */
 575    modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
 576    if (!modes)
 577       return NULL;
 578
 579    prop_size = nprops * __GLX_SIZE_INT32;
 580    if (prop_size <= sizeof(buf))
 581       props = buf;
 582    else
 583       props = Xmalloc(prop_size);
 584
 585    /* Read each config structure and convert it into our format */
 586    m = modes;
 587    for (i = 0; i < nvisuals; i++) {
 588       _XRead(dpy, (char *) props, prop_size);
 589       /* Older X servers don't send this so we default it here. */
 590       m->drawableType = GLX_WINDOW_BIT;
 591       __glXInitializeVisualConfigFromTags(m, nprops, props,
 592                                           tagged_only, GL_TRUE);
 593       m->screen = screen;
 594       m = m->next;
 595    }
 596
 597    if (props != buf)
 598       Xfree(props);
 599
 600    return modes;
 601 }
 602
 603 static GLboolean
 604 getVisualConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
 605 {
 606    xGLXGetVisualConfigsReq *req;
 607    __GLXscreenConfigs *psc;
 608    xGLXGetVisualConfigsReply reply;
 609
 610    LockDisplay(dpy);
 611
 612    psc = priv->screenConfigs + screen;
 613    psc->visuals = NULL;
 614    GetReq(GLXGetVisualConfigs, req);
 615    req->reqType = priv->majorOpcode;
 616    req->glxCode = X_GLXGetVisualConfigs;
 617    req->screen = screen;
 618
 619    if (!_XReply(dpy, (xReply *) & reply, 0, False))
 620       goto out;
 621
 622    psc->visuals = createConfigsFromProperties(dpy,
 623                                               reply.numVisuals,
 624                                               reply.numProps,
 625                                               screen, GL_FALSE);
 626
 627  out:
 628    UnlockDisplay(dpy);
 629    return psc->visuals != NULL;
 630 }
 631
 632 static GLboolean
 633 getFBConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
 634 {
 635    xGLXGetFBConfigsReq *fb_req;
 636    xGLXGetFBConfigsSGIXReq *sgi_req;
 637    xGLXVendorPrivateWithReplyReq *vpreq;
 638    xGLXGetFBConfigsReply reply;
 639    __GLXscreenConfigs *psc;
 640
 641    psc = priv->screenConfigs + screen;
 642    psc->serverGLXexts =
 643       __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
 644
 645    LockDisplay(dpy);
 646
 647    psc->configs = NULL;
 648    if (atof(priv->serverGLXversion) >= 1.3) {
 649       GetReq(GLXGetFBConfigs, fb_req);
 650       fb_req->reqType = priv->majorOpcode;
 651       fb_req->glxCode = X_GLXGetFBConfigs;
 652       fb_req->screen = screen;
 653    }
 654    else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
 655       GetReqExtra(GLXVendorPrivateWithReply,
 656                   sz_xGLXGetFBConfigsSGIXReq +
 657                   sz_xGLXVendorPrivateWithReplyReq, vpreq);
 658       sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
 659       sgi_req->reqType = priv->majorOpcode;
 660       sgi_req->glxCode = X_GLXVendorPrivateWithReply;
 661       sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
 662       sgi_req->screen = screen;
 663    }
 664    else
 665       goto out;
 666
 667    if (!_XReply(dpy, (xReply *) & reply, 0, False))
 668       goto out;
 669
 670    psc->configs = createConfigsFromProperties(dpy,
 671                                               reply.numFBConfigs,
 672                                               reply.numAttribs * 2,
 673                                               screen, GL_TRUE);
 674
 675  out:
 676    UnlockDisplay(dpy);
 677    return psc->configs != NULL;
 678 }
 679
 680 /*
 681 ** Allocate the memory for the per screen configs for each screen.
 682 ** If that works then fetch the per screen configs data.
 683 */
 684 static Bool
 685 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
 686 {
 687    __GLXscreenConfigs *psc;
 688    GLint i, screens;
 689
 690    /*
 691     ** First allocate memory for the array of per screen configs.
 692     */
 693    screens = ScreenCount(dpy);
 694    psc = (__GLXscreenConfigs *) Xmalloc(screens * sizeof(__GLXscreenConfigs));
 695    if (!psc) {
 696       return GL_FALSE;
 697    }
 698    memset(psc, 0, screens * sizeof(__GLXscreenConfigs));
 699    priv->screenConfigs = psc;
 700
 701    priv->serverGLXversion =
 702       __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
 703    if (priv->serverGLXversion == NULL) {
 704       FreeScreenConfigs(priv);
 705       return GL_FALSE;
 706    }
 707
 708    for (i = 0; i < screens; i++, psc++) {
 709       getVisualConfigs(dpy, priv, i);
 710       getFBConfigs(dpy, priv, i);
 711
 712 #ifdef GLX_DIRECT_RENDERING
 713       psc->scr = i;
 714       psc->dpy = dpy;
 715       psc->drawHash = __glxHashCreate();
 716       if (psc->drawHash == NULL)
 717          continue;
 718
 719       if (priv->dri2Display)
 720          psc->driScreen = (*priv->dri2Display->createScreen) (psc, i, priv);
 721
 722       if (psc->driScreen == NULL && priv->driDisplay)
 723          psc->driScreen = (*priv->driDisplay->createScreen) (psc, i, priv);
 724
 725       if (psc->driScreen == NULL && priv->driswDisplay)
 726          psc->driScreen = (*priv->driswDisplay->createScreen) (psc, i, priv);
 727
 728       if (psc->driScreen == NULL) {
 729          __glxHashDestroy(psc->drawHash);
 730          psc->drawHash = NULL;
 731       }
 732 #endif
 733    }
 734    SyncHandle();
 735    return GL_TRUE;
 736 }
 737
 738 /*
 739 ** Initialize the client side extension code.
 740 */
 741 _X_HIDDEN __GLXdisplayPrivate *
 742 __glXInitialize(Display * dpy)
 743 {
 744    XExtDisplayInfo *info = __glXFindDisplay(dpy);
 745    XExtData **privList, *private, *found;
 746    __GLXdisplayPrivate *dpyPriv;
 747    XEDataObject dataObj;
 748    int major, minor;
 749 #ifdef GLX_DIRECT_RENDERING
 750    Bool glx_direct, glx_accel;
 751 #endif
 752
 753    /* The one and only long long lock */
 754    __glXLock();
 755
 756    if (!XextHasExtension(info)) {
 757       /* No GLX extension supported by this server. Oh well. */
 758       __glXUnlock();
 759       XMissingExtension(dpy, __glXExtensionName);
 760       return 0;
 761    }
 762
 763    /* See if a display private already exists.  If so, return it */
 764    dataObj.display = dpy;
 765    privList = XEHeadOfExtensionList(dataObj);
 766    found = XFindOnExtensionList(privList, info->codes->extension);
 767    if (found) {
 768       __glXUnlock();
 769       return (__GLXdisplayPrivate *) found->private_data;
 770    }
 771
 772    /* See if the versions are compatible */
 773    if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
 774       /* The client and server do not agree on versions.  Punt. */
 775       __glXUnlock();
 776       return 0;
 777    }
 778
 779    /*
 780     ** Allocate memory for all the pieces needed for this buffer.
 781     */
 782    private = (XExtData *) Xmalloc(sizeof(XExtData));
 783    if (!private) {
 784       __glXUnlock();
 785       return 0;
 786    }
 787    dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate));
 788    if (!dpyPriv) {
 789       __glXUnlock();
 790       Xfree((char *) private);
 791       return 0;
 792    }
 793
 794    /*
 795     ** Init the display private and then read in the screen config
 796     ** structures from the server.
 797     */
 798    dpyPriv->majorOpcode = info->codes->major_opcode;
 799    dpyPriv->majorVersion = major;
 800    dpyPriv->minorVersion = minor;
 801    dpyPriv->dpy = dpy;
 802
 803    dpyPriv->serverGLXvendor = 0x0;
 804    dpyPriv->serverGLXversion = 0x0;
 805
 806 #ifdef GLX_DIRECT_RENDERING
 807    glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
 808    glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
 809
 810    /*
 811     ** Initialize the direct rendering per display data and functions.
 812     ** Note: This _must_ be done before calling any other DRI routines
 813     ** (e.g., those called in AllocAndFetchScreenConfigs).
 814     */
 815    if (glx_direct && glx_accel) {
 816       dpyPriv->dri2Display = dri2CreateDisplay(dpy);
 817       dpyPriv->driDisplay = driCreateDisplay(dpy);
 818    }
 819    if (glx_direct)
 820       dpyPriv->driswDisplay = driswCreateDisplay(dpy);
 821 #endif
 822
 823    if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
 824       __glXUnlock();
 825       Xfree((char *) dpyPriv);
 826       Xfree((char *) private);
 827       return 0;
 828    }
 829
 830    /*
 831     ** Fill in the private structure.  This is the actual structure that
 832     ** hangs off of the Display structure.  Our private structure is
 833     ** referred to by this structure.  Got that?
 834     */
 835    private->number = info->codes->extension;
 836    private->next = 0;
 837    private->free_private = __glXFreeDisplayPrivate;
 838    private->private_data = (char *) dpyPriv;
 839    XAddToExtensionList(privList, private);
 840
 841    if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) {
 842       __glXClientInfo(dpy, dpyPriv->majorOpcode);
 843    }
 844    __glXUnlock();
 845
 846    return dpyPriv;
 847 }
 848
 849 /*
 850 ** Setup for sending a GLX command on dpy.  Make sure the extension is
 851 ** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
 852 */
 853 _X_HIDDEN CARD8
 854 __glXSetupForCommand(Display * dpy)
 855 {
 856    GLXContext gc;
 857    __GLXdisplayPrivate *priv;
 858
 859    /* If this thread has a current context, flush its rendering commands */
 860    gc = __glXGetCurrentContext();
 861    if (gc->currentDpy) {
 862       /* Flush rendering buffer of the current context, if any */
 863       (void) __glXFlushRenderBuffer(gc, gc->pc);
 864
 865       if (gc->currentDpy == dpy) {
 866          /* Use opcode from gc because its right */
 867          return gc->majorOpcode;
 868       }
 869       else {
 870          /*
 871           ** Have to get info about argument dpy because it might be to
 872           ** a different server
 873           */
 874       }
 875    }
 876
 877    /* Forced to lookup extension via the slow initialize route */
 878    priv = __glXInitialize(dpy);
 879    if (!priv) {
 880       return 0;
 881    }
 882    return priv->majorOpcode;
 883 }
 884
 885 /**
 886  * Flush the drawing command transport buffer.
 887  *
 888  * \param ctx  Context whose transport buffer is to be flushed.
 889  * \param pc   Pointer to first unused buffer location.
 890  *
 891  * \todo
 892  * Modify this function to use \c ctx->pc instead of the explicit
 893  * \c pc parameter.
 894  */
 895 _X_HIDDEN GLubyte *
 896 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
 897 {
 898    Display *const dpy = ctx->currentDpy;
 899 #ifdef USE_XCB
 900    xcb_connection_t *c = XGetXCBConnection(dpy);
 901 #else
 902    xGLXRenderReq *req;
 903 #endif /* USE_XCB */
 904    const GLint size = pc - ctx->buf;
 905
 906    if ((dpy != NULL) && (size > 0)) {
 907 #ifdef USE_XCB
 908       xcb_glx_render(c, ctx->currentContextTag, size,
 909                      (const uint8_t *) ctx->buf);
 910 #else
 911       /* Send the entire buffer as an X request */
 912       LockDisplay(dpy);
 913       GetReq(GLXRender, req);
 914       req->reqType = ctx->majorOpcode;
 915       req->glxCode = X_GLXRender;
 916       req->contextTag = ctx->currentContextTag;
 917       req->length += (size + 3) >> 2;
 918       _XSend(dpy, (char *) ctx->buf, size);
 919       UnlockDisplay(dpy);
 920       SyncHandle();
 921 #endif
 922    }
 923
 924    /* Reset pointer and return it */
 925    ctx->pc = ctx->buf;
 926    return ctx->pc;
 927 }
 928
 929
 930 /**
 931  * Send a portion of a GLXRenderLarge command to the server.  The advantage of
 932  * this function over \c __glXSendLargeCommand is that callers can use the
 933  * data buffer in the GLX context and may be able to avoid allocating an
 934  * extra buffer.  The disadvantage is the clients will have to do more
 935  * GLX protocol work (i.e., calculating \c totalRequests, etc.).
 936  *
 937  * \sa __glXSendLargeCommand
 938  *
 939  * \param gc             GLX context
 940  * \param requestNumber  Which part of the whole command is this?  The first
 941  *                       request is 1.
 942  * \param totalRequests  How many requests will there be?
 943  * \param data           Command data.
 944  * \param dataLen        Size, in bytes, of the command data.
 945  */
 946 _X_HIDDEN void
 947 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
 948                     GLint totalRequests, const GLvoid * data, GLint dataLen)
 949 {
 950    Display *dpy = gc->currentDpy;
 951 #ifdef USE_XCB
 952    xcb_connection_t *c = XGetXCBConnection(dpy);
 953    xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
 954                         totalRequests, dataLen, data);
 955 #else
 956    xGLXRenderLargeReq *req;
 957
 958    if (requestNumber == 1) {
 959       LockDisplay(dpy);
 960    }
 961
 962    GetReq(GLXRenderLarge, req);
 963    req->reqType = gc->majorOpcode;
 964    req->glxCode = X_GLXRenderLarge;
 965    req->contextTag = gc->currentContextTag;
 966    req->length += (dataLen + 3) >> 2;
 967    req->requestNumber = requestNumber;
 968    req->requestTotal = totalRequests;
 969    req->dataBytes = dataLen;
 970    Data(dpy, data, dataLen);
 971
 972    if (requestNumber == totalRequests) {
 973       UnlockDisplay(dpy);
 974       SyncHandle();
 975    }
 976 #endif /* USE_XCB */
 977 }
 978
 979
 980 /**
 981  * Send a command that is too large for the GLXRender protocol request.
 982  *
 983  * Send a large command, one that is too large for some reason to
 984  * send using the GLXRender protocol request.  One reason to send
 985  * a large command is to avoid copying the data.
 986  *
 987  * \param ctx        GLX context
 988  * \param header     Header data.
 989  * \param headerLen  Size, in bytes, of the header data.  It is assumed that
 990  *                   the header data will always be small enough to fit in
 991  *                   a single X protocol packet.
 992  * \param data       Command data.
 993  * \param dataLen    Size, in bytes, of the command data.
 994  */
 995 _X_HIDDEN void
 996 __glXSendLargeCommand(__GLXcontext * ctx,
 997                       const GLvoid * header, GLint headerLen,
 998                       const GLvoid * data, GLint dataLen)
 999 {
1000    GLint maxSize;
1001    GLint totalRequests, requestNumber;
1002
1003    /*
1004     ** Calculate the maximum amount of data can be stuffed into a single
1005     ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
1006     ** packet size minus sz_xGLXRenderReq.
1007     */
1008    maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1009    totalRequests = 1 + (dataLen / maxSize);
1010    if (dataLen % maxSize)
1011       totalRequests++;
1012
1013    /*
1014     ** Send all of the command, except the large array, as one request.
1015     */
1016    assert(headerLen <= maxSize);
1017    __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1018
1019    /*
1020     ** Send enough requests until the whole array is sent.
1021     */
1022    for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1023         requestNumber++) {
1024       __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1025       data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1026       dataLen -= maxSize;
1027       assert(dataLen > 0);
1028    }
1029
1030    assert(dataLen <= maxSize);
1031    __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1032 }
1033
1034 /************************************************************************/
1035
1036 #ifdef DEBUG
1037 _X_HIDDEN void
1038 __glXDumpDrawBuffer(__GLXcontext * ctx)
1039 {
1040    GLubyte *p = ctx->buf;
1041    GLubyte *end = ctx->pc;
1042    GLushort opcode, length;
1043
1044    while (p < end) {
1045       /* Fetch opcode */
1046       opcode = *((GLushort *) p);
1047       length = *((GLushort *) (p + 2));
1048       printf("%2x: %5d: ", opcode, length);
1049       length -= 4;
1050       p += 4;
1051       while (length > 0) {
1052          printf("%08x ", *((unsigned *) p));
1053          p += 4;
1054          length -= 4;
1055       }
1056       printf("\n");
1057    }
1058 }
1059 #endif