src/glx/x11/glxext.c

   1 /* -*- mode: c; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3; coding: utf-8-unix -*- */
   2 /*
   3  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   4  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice including the dates of first publication and
  14  * either this permission notice or a reference to
  15  * http://oss.sgi.com/projects/FreeB/
  16  * shall be included in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  23  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  *
  26  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  27  * shall not be used in advertising or otherwise to promote the sale, use or
  28  * other dealings in this Software without prior written authorization from
  29  * Silicon Graphics, Inc.
  30  */
  31
  32 /**
  33  * \file glxext.c
  34  * GLX protocol interface boot-strap code.
  35  *
  36  * Direct rendering support added by Precision Insight, Inc.
  37  *
  38  * \author Kevin E. Martin <kevin@precisioninsight.com>
  39  */
  40
  41 #include <assert.h>
  42 #include "glxclient.h"
  43 #include <X11/extensions/Xext.h>
  44 #include <X11/extensions/extutil.h>
  45 #include "glapi.h"
  46 #include "glxextensions.h"
  47 #include "glcontextmodes.h"
  48
  49 #ifdef USE_XCB
  50 #include <X11/Xlib-xcb.h>
  51 #include <xcb/xcb.h>
  52 #include <xcb/glx.h>
  53 #endif
  54
  55
  56 #ifdef DEBUG
  57 void __glXDumpDrawBuffer(__GLXcontext * ctx);
  58 #endif
  59
  60 #ifdef USE_SPARC_ASM
  61 static void _glx_mesa_init_sparc_glapi_relocs(void);
  62 static int _mesa_sparc_needs_init = 1;
  63 #define INIT_MESA_SPARC do {               \
  64    if (_mesa_sparc_needs_init) {           \
  65       _glx_mesa_init_sparc_glapi_relocs(); \
  66       _mesa_sparc_needs_init = 0;          \
  67    }                                       \
  68   } while(0)
  69 #else
  70 #define INIT_MESA_SPARC do { } while(0)
  71 #endif
  72
  73 /*
  74 ** You can set this cell to 1 to force the gl drawing stuff to be
  75 ** one command per packet
  76 */
  77 _X_HIDDEN int __glXDebug = 0;
  78
  79 /* Extension required boiler plate */
  80
  81 static char *__glXExtensionName = GLX_EXTENSION_NAME;
  82 XExtensionInfo *__glXExtensionInfo = NULL;
  83
  84 static /* const */ char *error_list[] = {
  85    "GLXBadContext",
  86    "GLXBadContextState",
  87    "GLXBadDrawable",
  88    "GLXBadPixmap",
  89    "GLXBadContextTag",
  90    "GLXBadCurrentWindow",
  91    "GLXBadRenderRequest",
  92    "GLXBadLargeRequest",
  93    "GLXUnsupportedPrivateRequest",
  94    "GLXBadFBConfig",
  95    "GLXBadPbuffer",
  96    "GLXBadCurrentDrawable",
  97    "GLXBadWindow",
  98 };
  99
 100 static int
 101 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
 102 {
 103    GLXContext gc;
 104
 105    gc = __glXGetCurrentContext();
 106    if (dpy == gc->currentDpy) {
 107       __glXSetCurrentContextNull();
 108       __glXFreeContext(gc);
 109    }
 110
 111    return XextRemoveDisplay(__glXExtensionInfo, dpy);
 112 }
 113
 114
 115 static
 116 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
 117                            __GLX_NUMBER_ERRORS, error_list)
 118
 119      static /* const */ XExtensionHooks __glXExtensionHooks = {
 120         NULL,                   /* create_gc */
 121         NULL,                   /* copy_gc */
 122         NULL,                   /* flush_gc */
 123         NULL,                   /* free_gc */
 124         NULL,                   /* create_font */
 125         NULL,                   /* free_font */
 126         __glXCloseDisplay,      /* close_display */
 127         NULL,                   /* wire_to_event */
 128         NULL,                   /* event_to_wire */
 129         NULL,                   /* error */
 130         __glXErrorString,       /* error_string */
 131      };
 132
 133 static
 134 XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo,
 135                            __glXExtensionName, &__glXExtensionHooks,
 136                            __GLX_NUMBER_EVENTS, NULL)
 137
 138 /************************************************************************/
 139 /*
 140 ** Free the per screen configs data as well as the array of
 141 ** __glXScreenConfigs.
 142 */
 143      static void FreeScreenConfigs(__GLXdisplayPrivate * priv)
 144 {
 145    __GLXscreenConfigs *psc;
 146    GLint i, screens;
 147
 148    /* Free screen configuration information */
 149    psc = priv->screenConfigs;
 150    screens = ScreenCount(priv->dpy);
 151    for (i = 0; i < screens; i++, psc++) {
 152       if (psc->configs) {
 153          _gl_context_modes_destroy(psc->configs);
 154          if (psc->effectiveGLXexts)
 155             Xfree(psc->effectiveGLXexts);
 156          psc->configs = NULL;   /* NOTE: just for paranoia */
 157       }
 158       if (psc->visuals) {
 159          _gl_context_modes_destroy(psc->visuals);
 160          psc->visuals = NULL;   /* NOTE: just for paranoia */
 161       }
 162       Xfree((char *) psc->serverGLXexts);
 163
 164 #ifdef GLX_DIRECT_RENDERING
 165       if (psc->driScreen) {
 166          psc->driScreen->destroyScreen(psc);
 167          __glxHashDestroy(psc->drawHash);
 168          XFree(psc->driScreen);
 169          psc->driScreen = NULL;
 170       }
 171 #endif
 172    }
 173    XFree((char *) priv->screenConfigs);
 174    priv->screenConfigs = NULL;
 175 }
 176
 177 /*
 178 ** Release the private memory referred to in a display private
 179 ** structure.  The caller will free the extension structure.
 180 */
 181 static int
 182 __glXFreeDisplayPrivate(XExtData * extension)
 183 {
 184    __GLXdisplayPrivate *priv;
 185
 186    priv = (__GLXdisplayPrivate *) extension->private_data;
 187    FreeScreenConfigs(priv);
 188    if (priv->serverGLXvendor) {
 189       Xfree((char *) priv->serverGLXvendor);
 190       priv->serverGLXvendor = 0x0;      /* to protect against double free's */
 191    }
 192    if (priv->serverGLXversion) {
 193       Xfree((char *) priv->serverGLXversion);
 194       priv->serverGLXversion = 0x0;     /* to protect against double free's */
 195    }
 196
 197 #ifdef GLX_DIRECT_RENDERING
 198    /* Free the direct rendering per display data */
 199    if (priv->driswDisplay)
 200       (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
 201    priv->driswDisplay = NULL;
 202
 203    if (priv->driDisplay)
 204       (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
 205    priv->driDisplay = NULL;
 206
 207    if (priv->dri2Display)
 208       (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
 209    priv->dri2Display = NULL;
 210 #endif
 211
 212    Xfree((char *) priv);
 213    return 0;
 214 }
 215
 216 /************************************************************************/
 217
 218 /*
 219 ** Query the version of the GLX extension.  This procedure works even if
 220 ** the client extension is not completely set up.
 221 */
 222 static Bool
 223 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
 224 {
 225    xGLXQueryVersionReq *req;
 226    xGLXQueryVersionReply reply;
 227
 228    /* Send the glXQueryVersion request */
 229    LockDisplay(dpy);
 230    GetReq(GLXQueryVersion, req);
 231    req->reqType = opcode;
 232    req->glxCode = X_GLXQueryVersion;
 233    req->majorVersion = GLX_MAJOR_VERSION;
 234    req->minorVersion = GLX_MINOR_VERSION;
 235    _XReply(dpy, (xReply *) & reply, 0, False);
 236    UnlockDisplay(dpy);
 237    SyncHandle();
 238
 239    if (reply.majorVersion != GLX_MAJOR_VERSION) {
 240       /*
 241        ** The server does not support the same major release as this
 242        ** client.
 243        */
 244       return GL_FALSE;
 245    }
 246    *major = reply.majorVersion;
 247    *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
 248    return GL_TRUE;
 249 }
 250
 251
 252 _X_HIDDEN void
 253 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
 254                                     const INT32 * bp, Bool tagged_only,
 255                                     Bool fbconfig_style_tags)
 256 {
 257    int i;
 258
 259    if (!tagged_only) {
 260       /* Copy in the first set of properties */
 261       config->visualID = *bp++;
 262
 263       config->visualType = _gl_convert_from_x_visual_type(*bp++);
 264
 265       config->rgbMode = *bp++;
 266
 267       config->redBits = *bp++;
 268       config->greenBits = *bp++;
 269       config->blueBits = *bp++;
 270       config->alphaBits = *bp++;
 271       config->accumRedBits = *bp++;
 272       config->accumGreenBits = *bp++;
 273       config->accumBlueBits = *bp++;
 274       config->accumAlphaBits = *bp++;
 275
 276       config->doubleBufferMode = *bp++;
 277       config->stereoMode = *bp++;
 278
 279       config->rgbBits = *bp++;
 280       config->depthBits = *bp++;
 281       config->stencilBits = *bp++;
 282       config->numAuxBuffers = *bp++;
 283       config->level = *bp++;
 284
 285       count -= __GLX_MIN_CONFIG_PROPS;
 286    }
 287
 288    /*
 289     ** Additional properties may be in a list at the end
 290     ** of the reply.  They are in pairs of property type
 291     ** and property value.
 292     */
 293
 294 #define FETCH_OR_SET(tag) \
 295     config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
 296
 297    for (i = 0; i < count; i += 2) {
 298       switch (*bp++) {
 299       case GLX_RGBA:
 300          FETCH_OR_SET(rgbMode);
 301          break;
 302       case GLX_BUFFER_SIZE:
 303          config->rgbBits = *bp++;
 304          break;
 305       case GLX_LEVEL:
 306          config->level = *bp++;
 307          break;
 308       case GLX_DOUBLEBUFFER:
 309          FETCH_OR_SET(doubleBufferMode);
 310          break;
 311       case GLX_STEREO:
 312          FETCH_OR_SET(stereoMode);
 313          break;
 314       case GLX_AUX_BUFFERS:
 315          config->numAuxBuffers = *bp++;
 316          break;
 317       case GLX_RED_SIZE:
 318          config->redBits = *bp++;
 319          break;
 320       case GLX_GREEN_SIZE:
 321          config->greenBits = *bp++;
 322          break;
 323       case GLX_BLUE_SIZE:
 324          config->blueBits = *bp++;
 325          break;
 326       case GLX_ALPHA_SIZE:
 327          config->alphaBits = *bp++;
 328          break;
 329       case GLX_DEPTH_SIZE:
 330          config->depthBits = *bp++;
 331          break;
 332       case GLX_STENCIL_SIZE:
 333          config->stencilBits = *bp++;
 334          break;
 335       case GLX_ACCUM_RED_SIZE:
 336          config->accumRedBits = *bp++;
 337          break;
 338       case GLX_ACCUM_GREEN_SIZE:
 339          config->accumGreenBits = *bp++;
 340          break;
 341       case GLX_ACCUM_BLUE_SIZE:
 342          config->accumBlueBits = *bp++;
 343          break;
 344       case GLX_ACCUM_ALPHA_SIZE:
 345          config->accumAlphaBits = *bp++;
 346          break;
 347       case GLX_VISUAL_CAVEAT_EXT:
 348          config->visualRating = *bp++;
 349          break;
 350       case GLX_X_VISUAL_TYPE:
 351          config->visualType = *bp++;
 352          break;
 353       case GLX_TRANSPARENT_TYPE:
 354          config->transparentPixel = *bp++;
 355          break;
 356       case GLX_TRANSPARENT_INDEX_VALUE:
 357          config->transparentIndex = *bp++;
 358          break;
 359       case GLX_TRANSPARENT_RED_VALUE:
 360          config->transparentRed = *bp++;
 361          break;
 362       case GLX_TRANSPARENT_GREEN_VALUE:
 363          config->transparentGreen = *bp++;
 364          break;
 365       case GLX_TRANSPARENT_BLUE_VALUE:
 366          config->transparentBlue = *bp++;
 367          break;
 368       case GLX_TRANSPARENT_ALPHA_VALUE:
 369          config->transparentAlpha = *bp++;
 370          break;
 371       case GLX_VISUAL_ID:
 372          config->visualID = *bp++;
 373          break;
 374       case GLX_DRAWABLE_TYPE:
 375          config->drawableType = *bp++;
 376          break;
 377       case GLX_RENDER_TYPE:
 378          config->renderType = *bp++;
 379          break;
 380       case GLX_X_RENDERABLE:
 381          config->xRenderable = *bp++;
 382          break;
 383       case GLX_FBCONFIG_ID:
 384          config->fbconfigID = *bp++;
 385          break;
 386       case GLX_MAX_PBUFFER_WIDTH:
 387          config->maxPbufferWidth = *bp++;
 388          break;
 389       case GLX_MAX_PBUFFER_HEIGHT:
 390          config->maxPbufferHeight = *bp++;
 391          break;
 392       case GLX_MAX_PBUFFER_PIXELS:
 393          config->maxPbufferPixels = *bp++;
 394          break;
 395       case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
 396          config->optimalPbufferWidth = *bp++;
 397          break;
 398       case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
 399          config->optimalPbufferHeight = *bp++;
 400          break;
 401       case GLX_VISUAL_SELECT_GROUP_SGIX:
 402          config->visualSelectGroup = *bp++;
 403          break;
 404       case GLX_SWAP_METHOD_OML:
 405          config->swapMethod = *bp++;
 406          break;
 407       case GLX_SAMPLE_BUFFERS_SGIS:
 408          config->sampleBuffers = *bp++;
 409          break;
 410       case GLX_SAMPLES_SGIS:
 411          config->samples = *bp++;
 412          break;
 413       case GLX_BIND_TO_TEXTURE_RGB_EXT:
 414          config->bindToTextureRgb = *bp++;
 415          break;
 416       case GLX_BIND_TO_TEXTURE_RGBA_EXT:
 417          config->bindToTextureRgba = *bp++;
 418          break;
 419       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
 420          config->bindToMipmapTexture = *bp++;
 421          break;
 422       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
 423          config->bindToTextureTargets = *bp++;
 424          break;
 425       case GLX_Y_INVERTED_EXT:
 426          config->yInverted = *bp++;
 427          break;
 428       case None:
 429          i = count;
 430          break;
 431       default:
 432          break;
 433       }
 434    }
 435
 436    config->renderType =
 437       (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
 438
 439    config->haveAccumBuffer = ((config->accumRedBits +
 440                                config->accumGreenBits +
 441                                config->accumBlueBits +
 442                                config->accumAlphaBits) > 0);
 443    config->haveDepthBuffer = (config->depthBits > 0);
 444    config->haveStencilBuffer = (config->stencilBits > 0);
 445 }
 446
 447 static __GLcontextModes *
 448 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
 449                             int screen, GLboolean tagged_only)
 450 {
 451    INT32 buf[__GLX_TOTAL_CONFIG], *props;
 452    unsigned prop_size;
 453    __GLcontextModes *modes, *m;
 454    int i;
 455
 456    if (nprops == 0)
 457       return NULL;
 458
 459    /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
 460
 461    /* Check number of properties */
 462    if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
 463       return NULL;
 464
 465    /* Allocate memory for our config structure */
 466    modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
 467    if (!modes)
 468       return NULL;
 469
 470    prop_size = nprops * __GLX_SIZE_INT32;
 471    if (prop_size <= sizeof(buf))
 472       props = buf;
 473    else
 474       props = Xmalloc(prop_size);
 475
 476    /* Read each config structure and convert it into our format */
 477    m = modes;
 478    for (i = 0; i < nvisuals; i++) {
 479       _XRead(dpy, (char *) props, prop_size);
 480       /* Older X servers don't send this so we default it here. */
 481       m->drawableType = GLX_WINDOW_BIT;
 482       __glXInitializeVisualConfigFromTags(m, nprops, props,
 483                                           tagged_only, GL_TRUE);
 484       m->screen = screen;
 485       m = m->next;
 486    }
 487
 488    if (props != buf)
 489       Xfree(props);
 490
 491    return modes;
 492 }
 493
 494 static GLboolean
 495 getVisualConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
 496 {
 497    xGLXGetVisualConfigsReq *req;
 498    __GLXscreenConfigs *psc;
 499    xGLXGetVisualConfigsReply reply;
 500
 501    LockDisplay(dpy);
 502
 503    psc = priv->screenConfigs + screen;
 504    psc->visuals = NULL;
 505    GetReq(GLXGetVisualConfigs, req);
 506    req->reqType = priv->majorOpcode;
 507    req->glxCode = X_GLXGetVisualConfigs;
 508    req->screen = screen;
 509
 510    if (!_XReply(dpy, (xReply *) & reply, 0, False))
 511       goto out;
 512
 513    psc->visuals = createConfigsFromProperties(dpy,
 514                                               reply.numVisuals,
 515                                               reply.numProps,
 516                                               screen, GL_FALSE);
 517
 518  out:
 519    UnlockDisplay(dpy);
 520    return psc->visuals != NULL;
 521 }
 522
 523 static GLboolean
 524 getFBConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
 525 {
 526    xGLXGetFBConfigsReq *fb_req;
 527    xGLXGetFBConfigsSGIXReq *sgi_req;
 528    xGLXVendorPrivateWithReplyReq *vpreq;
 529    xGLXGetFBConfigsReply reply;
 530    __GLXscreenConfigs *psc;
 531
 532    psc = priv->screenConfigs + screen;
 533    psc->serverGLXexts = __glXGetStringFromServer(dpy, priv->majorOpcode,
 534                                                  X_GLXQueryServerString,
 535                                                  screen, GLX_EXTENSIONS);
 536
 537    LockDisplay(dpy);
 538
 539    psc->configs = NULL;
 540    if (atof(priv->serverGLXversion) >= 1.3) {
 541       GetReq(GLXGetFBConfigs, fb_req);
 542       fb_req->reqType = priv->majorOpcode;
 543       fb_req->glxCode = X_GLXGetFBConfigs;
 544       fb_req->screen = screen;
 545    }
 546    else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
 547       GetReqExtra(GLXVendorPrivateWithReply,
 548                   sz_xGLXGetFBConfigsSGIXReq +
 549                   sz_xGLXVendorPrivateWithReplyReq, vpreq);
 550       sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
 551       sgi_req->reqType = priv->majorOpcode;
 552       sgi_req->glxCode = X_GLXVendorPrivateWithReply;
 553       sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
 554       sgi_req->screen = screen;
 555    }
 556    else
 557       goto out;
 558
 559    if (!_XReply(dpy, (xReply *) & reply, 0, False))
 560       goto out;
 561
 562    psc->configs = createConfigsFromProperties(dpy,
 563                                               reply.numFBConfigs,
 564                                               reply.numAttribs * 2,
 565                                               screen, GL_TRUE);
 566
 567  out:
 568    UnlockDisplay(dpy);
 569    return psc->configs != NULL;
 570 }
 571
 572 /*
 573 ** Allocate the memory for the per screen configs for each screen.
 574 ** If that works then fetch the per screen configs data.
 575 */
 576 static Bool
 577 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
 578 {
 579    __GLXscreenConfigs *psc;
 580    GLint i, screens;
 581
 582    /*
 583     ** First allocate memory for the array of per screen configs.
 584     */
 585    screens = ScreenCount(dpy);
 586    psc = (__GLXscreenConfigs *) Xmalloc(screens * sizeof(__GLXscreenConfigs));
 587    if (!psc) {
 588       return GL_FALSE;
 589    }
 590    memset(psc, 0, screens * sizeof(__GLXscreenConfigs));
 591    priv->screenConfigs = psc;
 592
 593    priv->serverGLXversion = __glXGetStringFromServer(dpy, priv->majorOpcode,
 594                                                      X_GLXQueryServerString,
 595                                                      0, GLX_VERSION);
 596    if (priv->serverGLXversion == NULL) {
 597       FreeScreenConfigs(priv);
 598       return GL_FALSE;
 599    }
 600
 601    for (i = 0; i < screens; i++, psc++) {
 602       getVisualConfigs(dpy, priv, i);
 603       getFBConfigs(dpy, priv, i);
 604
 605 #ifdef GLX_DIRECT_RENDERING
 606       psc->scr = i;
 607       psc->dpy = dpy;
 608       psc->drawHash = __glxHashCreate();
 609       if (psc->drawHash == NULL)
 610          continue;
 611
 612       if (priv->dri2Display)
 613          psc->driScreen = (*priv->dri2Display->createScreen) (psc, i, priv);
 614
 615       if (psc->driScreen == NULL && priv->driDisplay)
 616          psc->driScreen = (*priv->driDisplay->createScreen) (psc, i, priv);
 617
 618       if (psc->driScreen == NULL && priv->driswDisplay)
 619          psc->driScreen = (*priv->driswDisplay->createScreen) (psc, i, priv);
 620
 621       if (psc->driScreen == NULL) {
 622          __glxHashDestroy(psc->drawHash);
 623          psc->drawHash = NULL;
 624       }
 625 #endif
 626    }
 627    SyncHandle();
 628    return GL_TRUE;
 629 }
 630
 631 /*
 632 ** Initialize the client side extension code.
 633 */
 634 _X_HIDDEN __GLXdisplayPrivate *
 635 __glXInitialize(Display * dpy)
 636 {
 637    XExtDisplayInfo *info = __glXFindDisplay(dpy);
 638    XExtData **privList, *private, *found;
 639    __GLXdisplayPrivate *dpyPriv;
 640    XEDataObject dataObj;
 641    int major, minor;
 642 #ifdef GLX_DIRECT_RENDERING
 643    Bool glx_direct, glx_accel;
 644 #endif
 645
 646 #if defined(USE_XTHREADS)
 647    {
 648       static int firstCall = 1;
 649       if (firstCall) {
 650          /* initialize the GLX mutexes */
 651          xmutex_init(&__glXmutex);
 652          firstCall = 0;
 653       }
 654    }
 655 #endif
 656
 657    INIT_MESA_SPARC;
 658    /* The one and only long long lock */
 659    __glXLock();
 660
 661    if (!XextHasExtension(info)) {
 662       /* No GLX extension supported by this server. Oh well. */
 663       __glXUnlock();
 664       XMissingExtension(dpy, __glXExtensionName);
 665       return 0;
 666    }
 667
 668    /* See if a display private already exists.  If so, return it */
 669    dataObj.display = dpy;
 670    privList = XEHeadOfExtensionList(dataObj);
 671    found = XFindOnExtensionList(privList, info->codes->extension);
 672    if (found) {
 673       __glXUnlock();
 674       return (__GLXdisplayPrivate *) found->private_data;
 675    }
 676
 677    /* See if the versions are compatible */
 678    if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
 679       /* The client and server do not agree on versions.  Punt. */
 680       __glXUnlock();
 681       return 0;
 682    }
 683
 684    /*
 685     ** Allocate memory for all the pieces needed for this buffer.
 686     */
 687    private = (XExtData *) Xmalloc(sizeof(XExtData));
 688    if (!private) {
 689       __glXUnlock();
 690       return 0;
 691    }
 692    dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate));
 693    if (!dpyPriv) {
 694       __glXUnlock();
 695       Xfree((char *) private);
 696       return 0;
 697    }
 698
 699    /*
 700     ** Init the display private and then read in the screen config
 701     ** structures from the server.
 702     */
 703    dpyPriv->majorOpcode = info->codes->major_opcode;
 704    dpyPriv->majorVersion = major;
 705    dpyPriv->minorVersion = minor;
 706    dpyPriv->dpy = dpy;
 707
 708    dpyPriv->serverGLXvendor = 0x0;
 709    dpyPriv->serverGLXversion = 0x0;
 710
 711 #ifdef GLX_DIRECT_RENDERING
 712    glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
 713    glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
 714
 715    /*
 716     ** Initialize the direct rendering per display data and functions.
 717     ** Note: This _must_ be done before calling any other DRI routines
 718     ** (e.g., those called in AllocAndFetchScreenConfigs).
 719     */
 720    if (glx_direct && glx_accel) {
 721       dpyPriv->dri2Display = dri2CreateDisplay(dpy);
 722       dpyPriv->driDisplay = driCreateDisplay(dpy);
 723    }
 724    if (glx_direct)
 725       dpyPriv->driswDisplay = driswCreateDisplay(dpy);
 726 #endif
 727
 728    if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
 729       __glXUnlock();
 730       Xfree((char *) dpyPriv);
 731       Xfree((char *) private);
 732       return 0;
 733    }
 734
 735    /*
 736     ** Fill in the private structure.  This is the actual structure that
 737     ** hangs off of the Display structure.  Our private structure is
 738     ** referred to by this structure.  Got that?
 739     */
 740    private->number = info->codes->extension;
 741    private->next = 0;
 742    private->free_private = __glXFreeDisplayPrivate;
 743    private->private_data = (char *) dpyPriv;
 744    XAddToExtensionList(privList, private);
 745
 746    if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) {
 747       __glXClientInfo(dpy, dpyPriv->majorOpcode);
 748    }
 749    __glXUnlock();
 750
 751    return dpyPriv;
 752 }
 753
 754 /*
 755 ** Setup for sending a GLX command on dpy.  Make sure the extension is
 756 ** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
 757 */
 758 _X_HIDDEN CARD8
 759 __glXSetupForCommand(Display * dpy)
 760 {
 761    GLXContext gc;
 762    __GLXdisplayPrivate *priv;
 763
 764    /* If this thread has a current context, flush its rendering commands */
 765    gc = __glXGetCurrentContext();
 766    if (gc->currentDpy) {
 767       /* Flush rendering buffer of the current context, if any */
 768       (void) __glXFlushRenderBuffer(gc, gc->pc);
 769
 770       if (gc->currentDpy == dpy) {
 771          /* Use opcode from gc because its right */
 772          INIT_MESA_SPARC;
 773          return gc->majorOpcode;
 774       }
 775       else {
 776          /*
 777           ** Have to get info about argument dpy because it might be to
 778           ** a different server
 779           */
 780       }
 781    }
 782
 783    /* Forced to lookup extension via the slow initialize route */
 784    priv = __glXInitialize(dpy);
 785    if (!priv) {
 786       return 0;
 787    }
 788    return priv->majorOpcode;
 789 }
 790
 791 /**
 792  * Flush the drawing command transport buffer.
 793  *
 794  * \param ctx  Context whose transport buffer is to be flushed.
 795  * \param pc   Pointer to first unused buffer location.
 796  *
 797  * \todo
 798  * Modify this function to use \c ctx->pc instead of the explicit
 799  * \c pc parameter.
 800  */
 801 _X_HIDDEN GLubyte *
 802 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
 803 {
 804    Display *const dpy = ctx->currentDpy;
 805 #ifdef USE_XCB
 806    xcb_connection_t *c = XGetXCBConnection(dpy);
 807 #else
 808    xGLXRenderReq *req;
 809 #endif /* USE_XCB */
 810    const GLint size = pc - ctx->buf;
 811
 812    if ((dpy != NULL) && (size > 0)) {
 813 #ifdef USE_XCB
 814       xcb_glx_render(c, ctx->currentContextTag, size,
 815                      (const uint8_t *) ctx->buf);
 816 #else
 817       /* Send the entire buffer as an X request */
 818       LockDisplay(dpy);
 819       GetReq(GLXRender, req);
 820       req->reqType = ctx->majorOpcode;
 821       req->glxCode = X_GLXRender;
 822       req->contextTag = ctx->currentContextTag;
 823       req->length += (size + 3) >> 2;
 824       _XSend(dpy, (char *) ctx->buf, size);
 825       UnlockDisplay(dpy);
 826       SyncHandle();
 827 #endif
 828    }
 829
 830    /* Reset pointer and return it */
 831    ctx->pc = ctx->buf;
 832    return ctx->pc;
 833 }
 834
 835
 836 /**
 837  * Send a portion of a GLXRenderLarge command to the server.  The advantage of
 838  * this function over \c __glXSendLargeCommand is that callers can use the
 839  * data buffer in the GLX context and may be able to avoid allocating an
 840  * extra buffer.  The disadvantage is the clients will have to do more
 841  * GLX protocol work (i.e., calculating \c totalRequests, etc.).
 842  *
 843  * \sa __glXSendLargeCommand
 844  *
 845  * \param gc             GLX context
 846  * \param requestNumber  Which part of the whole command is this?  The first
 847  *                       request is 1.
 848  * \param totalRequests  How many requests will there be?
 849  * \param data           Command data.
 850  * \param dataLen        Size, in bytes, of the command data.
 851  */
 852 _X_HIDDEN void
 853 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
 854                     GLint totalRequests, const GLvoid * data, GLint dataLen)
 855 {
 856    Display *dpy = gc->currentDpy;
 857 #ifdef USE_XCB
 858    xcb_connection_t *c = XGetXCBConnection(dpy);
 859    xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
 860                         totalRequests, dataLen, data);
 861 #else
 862    xGLXRenderLargeReq *req;
 863
 864    if (requestNumber == 1) {
 865       LockDisplay(dpy);
 866    }
 867
 868    GetReq(GLXRenderLarge, req);
 869    req->reqType = gc->majorOpcode;
 870    req->glxCode = X_GLXRenderLarge;
 871    req->contextTag = gc->currentContextTag;
 872    req->length += (dataLen + 3) >> 2;
 873    req->requestNumber = requestNumber;
 874    req->requestTotal = totalRequests;
 875    req->dataBytes = dataLen;
 876    Data(dpy, data, dataLen);
 877
 878    if (requestNumber == totalRequests) {
 879       UnlockDisplay(dpy);
 880       SyncHandle();
 881    }
 882 #endif /* USE_XCB */
 883 }
 884
 885
 886 /**
 887  * Send a command that is too large for the GLXRender protocol request.
 888  *
 889  * Send a large command, one that is too large for some reason to
 890  * send using the GLXRender protocol request.  One reason to send
 891  * a large command is to avoid copying the data.
 892  *
 893  * \param ctx        GLX context
 894  * \param header     Header data.
 895  * \param headerLen  Size, in bytes, of the header data.  It is assumed that
 896  *                   the header data will always be small enough to fit in
 897  *                   a single X protocol packet.
 898  * \param data       Command data.
 899  * \param dataLen    Size, in bytes, of the command data.
 900  */
 901 _X_HIDDEN void
 902 __glXSendLargeCommand(__GLXcontext * ctx,
 903                       const GLvoid * header, GLint headerLen,
 904                       const GLvoid * data, GLint dataLen)
 905 {
 906    GLint maxSize;
 907    GLint totalRequests, requestNumber;
 908
 909    /*
 910     ** Calculate the maximum amount of data can be stuffed into a single
 911     ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
 912     ** packet size minus sz_xGLXRenderReq.
 913     */
 914    maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
 915    totalRequests = 1 + (dataLen / maxSize);
 916    if (dataLen % maxSize)
 917       totalRequests++;
 918
 919    /*
 920     ** Send all of the command, except the large array, as one request.
 921     */
 922    assert(headerLen <= maxSize);
 923    __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
 924
 925    /*
 926     ** Send enough requests until the whole array is sent.
 927     */
 928    for (requestNumber = 2; requestNumber <= (totalRequests - 1);
 929         requestNumber++) {
 930       __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
 931       data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
 932       dataLen -= maxSize;
 933       assert(dataLen > 0);
 934    }
 935
 936    assert(dataLen <= maxSize);
 937    __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
 938 }
 939
 940 /************************************************************************/
 941
 942 #ifdef DEBUG
 943 _X_HIDDEN void
 944 __glXDumpDrawBuffer(__GLXcontext * ctx)
 945 {
 946    GLubyte *p = ctx->buf;
 947    GLubyte *end = ctx->pc;
 948    GLushort opcode, length;
 949
 950    while (p < end) {
 951       /* Fetch opcode */
 952       opcode = *((GLushort *) p);
 953       length = *((GLushort *) (p + 2));
 954       printf("%2x: %5d: ", opcode, length);
 955       length -= 4;
 956       p += 4;
 957       while (length > 0) {
 958          printf("%08x ", *((unsigned *) p));
 959          p += 4;
 960          length -= 4;
 961       }
 962       printf("\n");
 963    }
 964 }
 965 #endif
 966
 967 #ifdef  USE_SPARC_ASM
 968 /*
 969  * This is where our dispatch table's bounds are.
 970  * And the static mesa_init is taken directly from
 971  * Mesa's 'sparc.c' initializer.
 972  *
 973  * We need something like this here, because this version
 974  * of openGL/glx never initializes a Mesa context, and so
 975  * the address of the dispatch table pointer never gets stuffed
 976  * into the dispatch jump table otherwise.
 977  *
 978  * It matters only on SPARC, and only if you are using assembler
 979  * code instead of C-code indirect dispatch.
 980  *
 981  * -- FEM, 04.xii.03
 982  */
 983 extern unsigned int _mesa_sparc_glapi_begin;
 984 extern unsigned int _mesa_sparc_glapi_end;
 985 extern void __glapi_sparc_icache_flush(unsigned int *);
 986
 987 static void
 988 _glx_mesa_init_sparc_glapi_relocs(void)
 989 {
 990    unsigned int *insn_ptr, *end_ptr;
 991    unsigned long disp_addr;
 992
 993    insn_ptr = &_mesa_sparc_glapi_begin;
 994    end_ptr = &_mesa_sparc_glapi_end;
 995    disp_addr = (unsigned long) &_glapi_Dispatch;
 996
 997    /*
 998     * Verbatim from Mesa sparc.c.  It's needed because there doesn't
 999     * seem to be a better way to do this:
1000     *
1001     * UNCONDITIONAL_JUMP ( (*_glapi_Dispatch) + entry_offset )
1002     *
1003     * This code is patching in the ADDRESS of the pointer to the
1004     * dispatch table.  Hence, it must be called exactly once, because
1005     * that address is not going to change.
1006     *
1007     * What it points to can change, but Mesa (and hence, we) assume
1008     * that there is only one pointer.
1009     *
1010     */
1011    while (insn_ptr < end_ptr) {
1012 #if ( defined(__sparc_v9__) && ( !defined(__linux__) || defined(__linux_64__) ) )
1013 /*
1014         This code patches for 64-bit addresses.  This had better
1015         not happen for Sparc/Linux, no matter what architecture we
1016         are building for.  So, don't do this.
1017
1018         The 'defined(__linux_64__)' is used here as a placeholder for
1019         when we do do 64-bit usermode on sparc linux.
1020         */
1021       insn_ptr[0] |= (disp_addr >> (32 + 10));
1022       insn_ptr[1] |= ((disp_addr & 0xffffffff) >> 10);
1023       __glapi_sparc_icache_flush(&insn_ptr[0]);
1024       insn_ptr[2] |= ((disp_addr >> 32) & ((1 << 10) - 1));
1025       insn_ptr[3] |= (disp_addr & ((1 << 10) - 1));
1026       __glapi_sparc_icache_flush(&insn_ptr[2]);
1027       insn_ptr += 11;
1028 #else
1029       insn_ptr[0] |= (disp_addr >> 10);
1030       insn_ptr[1] |= (disp_addr & ((1 << 10) - 1));
1031       __glapi_sparc_icache_flush(&insn_ptr[0]);
1032       insn_ptr += 5;
1033 #endif
1034    }
1035 }
1036 #endif /* sparc ASM in use */