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 "glapi.h"
  45 #include "glxextensions.h"
  46 #include "glcontextmodes.h"
  47
  48 #ifdef USE_XCB
  49 #include <X11/Xlib-xcb.h>
  50 #include <xcb/xcb.h>
  51 #include <xcb/glx.h>
  52 #endif
  53
  54
  55 #ifdef DEBUG
  56 void __glXDumpDrawBuffer(__GLXcontext * ctx);
  57 #endif
  58
  59 #ifdef USE_SPARC_ASM
  60 static void _glx_mesa_init_sparc_glapi_relocs(void);
  61 static int _mesa_sparc_needs_init = 1;
  62 #define INIT_MESA_SPARC do {               \
  63    if (_mesa_sparc_needs_init) {           \
  64       _glx_mesa_init_sparc_glapi_relocs(); \
  65       _mesa_sparc_needs_init = 0;          \
  66    }                                       \
  67   } while(0)
  68 #else
  69 #define INIT_MESA_SPARC do { } while(0)
  70 #endif
  71
  72 /*
  73 ** You can set this cell to 1 to force the gl drawing stuff to be
  74 ** one command per packet
  75 */
  76 _X_HIDDEN int __glXDebug = 0;
  77
  78 /* Extension required boiler plate */
  79
  80 static char *__glXExtensionName = GLX_EXTENSION_NAME;
  81 XExtensionInfo *__glXExtensionInfo = NULL;
  82
  83 static /* const */ char *error_list[] = {
  84    "GLXBadContext",
  85    "GLXBadContextState",
  86    "GLXBadDrawable",
  87    "GLXBadPixmap",
  88    "GLXBadContextTag",
  89    "GLXBadCurrentWindow",
  90    "GLXBadRenderRequest",
  91    "GLXBadLargeRequest",
  92    "GLXUnsupportedPrivateRequest",
  93    "GLXBadFBConfig",
  94    "GLXBadPbuffer",
  95    "GLXBadCurrentDrawable",
  96    "GLXBadWindow",
  97 };
  98
  99 static int
 100 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
 101 {
 102    GLXContext gc;
 103
 104    gc = __glXGetCurrentContext();
 105    if (dpy == gc->currentDpy) {
 106       __glXSetCurrentContextNull();
 107       __glXFreeContext(gc);
 108    }
 109
 110    return XextRemoveDisplay(__glXExtensionInfo, dpy);
 111 }
 112
 113
 114 static
 115 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
 116                            __GLX_NUMBER_ERRORS, error_list)
 117
 118      static /* const */ XExtensionHooks __glXExtensionHooks = {
 119         NULL,                   /* create_gc */
 120         NULL,                   /* copy_gc */
 121         NULL,                   /* flush_gc */
 122         NULL,                   /* free_gc */
 123         NULL,                   /* create_font */
 124         NULL,                   /* free_font */
 125         __glXCloseDisplay,      /* close_display */
 126         NULL,                   /* wire_to_event */
 127         NULL,                   /* event_to_wire */
 128         NULL,                   /* error */
 129         __glXErrorString,       /* error_string */
 130      };
 131
 132 static
 133 XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo,
 134                            __glXExtensionName, &__glXExtensionHooks,
 135                            __GLX_NUMBER_EVENTS, NULL)
 136
 137 /************************************************************************/
 138 /*
 139 ** Free the per screen configs data as well as the array of
 140 ** __glXScreenConfigs.
 141 */
 142 static void
 143 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 #ifdef USE_XCB
 226    xcb_connection_t *c = XGetXCBConnection(dpy);
 227    xcb_glx_query_version_reply_t* reply =
 228       xcb_glx_query_version_reply(c,
 229                                   xcb_glx_query_version(c,
 230                                                         GLX_MAJOR_VERSION,
 231                                                         GLX_MINOR_VERSION),
 232                                   NULL);
 233
 234    if(reply->major_version != GLX_MAJOR_VERSION)
 235    {
 236       free(reply);
 237       return GL_FALSE;
 238    }
 239    *major = reply->major_version;
 240    *minor = min(reply->minor_version, GLX_MINOR_VERSION);
 241    free(reply);
 242    return GL_TRUE;
 243 #else
 244    xGLXQueryVersionReq *req;
 245    xGLXQueryVersionReply reply;
 246
 247    /* Send the glXQueryVersion request */
 248    LockDisplay(dpy);
 249    GetReq(GLXQueryVersion, req);
 250    req->reqType = opcode;
 251    req->glxCode = X_GLXQueryVersion;
 252    req->majorVersion = GLX_MAJOR_VERSION;
 253    req->minorVersion = GLX_MINOR_VERSION;
 254    _XReply(dpy, (xReply *) & reply, 0, False);
 255    UnlockDisplay(dpy);
 256    SyncHandle();
 257
 258    if (reply.majorVersion != GLX_MAJOR_VERSION) {
 259       /*
 260        ** The server does not support the same major release as this
 261        ** client.
 262        */
 263       return GL_FALSE;
 264    }
 265    *major = reply.majorVersion;
 266    *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
 267    return GL_TRUE;
 268 #endif /* USE_XCB */
 269 }
 270
 271
 272 _X_HIDDEN void
 273 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
 274                                     const INT32 * bp, Bool tagged_only,
 275                                     Bool fbconfig_style_tags)
 276 {
 277    int i;
 278
 279    if (!tagged_only) {
 280       /* Copy in the first set of properties */
 281       config->visualID = *bp++;
 282
 283       config->visualType = _gl_convert_from_x_visual_type(*bp++);
 284
 285       config->rgbMode = *bp++;
 286
 287       config->redBits = *bp++;
 288       config->greenBits = *bp++;
 289       config->blueBits = *bp++;
 290       config->alphaBits = *bp++;
 291       config->accumRedBits = *bp++;
 292       config->accumGreenBits = *bp++;
 293       config->accumBlueBits = *bp++;
 294       config->accumAlphaBits = *bp++;
 295
 296       config->doubleBufferMode = *bp++;
 297       config->stereoMode = *bp++;
 298
 299       config->rgbBits = *bp++;
 300       config->depthBits = *bp++;
 301       config->stencilBits = *bp++;
 302       config->numAuxBuffers = *bp++;
 303       config->level = *bp++;
 304
 305       count -= __GLX_MIN_CONFIG_PROPS;
 306    }
 307
 308    /*
 309     ** Additional properties may be in a list at the end
 310     ** of the reply.  They are in pairs of property type
 311     ** and property value.
 312     */
 313
 314 #define FETCH_OR_SET(tag) \
 315     config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
 316
 317    for (i = 0; i < count; i += 2) {
 318       switch (*bp++) {
 319       case GLX_RGBA:
 320          FETCH_OR_SET(rgbMode);
 321          break;
 322       case GLX_BUFFER_SIZE:
 323          config->rgbBits = *bp++;
 324          break;
 325       case GLX_LEVEL:
 326          config->level = *bp++;
 327          break;
 328       case GLX_DOUBLEBUFFER:
 329          FETCH_OR_SET(doubleBufferMode);
 330          break;
 331       case GLX_STEREO:
 332          FETCH_OR_SET(stereoMode);
 333          break;
 334       case GLX_AUX_BUFFERS:
 335          config->numAuxBuffers = *bp++;
 336          break;
 337       case GLX_RED_SIZE:
 338          config->redBits = *bp++;
 339          break;
 340       case GLX_GREEN_SIZE:
 341          config->greenBits = *bp++;
 342          break;
 343       case GLX_BLUE_SIZE:
 344          config->blueBits = *bp++;
 345          break;
 346       case GLX_ALPHA_SIZE:
 347          config->alphaBits = *bp++;
 348          break;
 349       case GLX_DEPTH_SIZE:
 350          config->depthBits = *bp++;
 351          break;
 352       case GLX_STENCIL_SIZE:
 353          config->stencilBits = *bp++;
 354          break;
 355       case GLX_ACCUM_RED_SIZE:
 356          config->accumRedBits = *bp++;
 357          break;
 358       case GLX_ACCUM_GREEN_SIZE:
 359          config->accumGreenBits = *bp++;
 360          break;
 361       case GLX_ACCUM_BLUE_SIZE:
 362          config->accumBlueBits = *bp++;
 363          break;
 364       case GLX_ACCUM_ALPHA_SIZE:
 365          config->accumAlphaBits = *bp++;
 366          break;
 367       case GLX_VISUAL_CAVEAT_EXT:
 368          config->visualRating = *bp++;
 369          break;
 370       case GLX_X_VISUAL_TYPE:
 371          config->visualType = *bp++;
 372          break;
 373       case GLX_TRANSPARENT_TYPE:
 374          config->transparentPixel = *bp++;
 375          break;
 376       case GLX_TRANSPARENT_INDEX_VALUE:
 377          config->transparentIndex = *bp++;
 378          break;
 379       case GLX_TRANSPARENT_RED_VALUE:
 380          config->transparentRed = *bp++;
 381          break;
 382       case GLX_TRANSPARENT_GREEN_VALUE:
 383          config->transparentGreen = *bp++;
 384          break;
 385       case GLX_TRANSPARENT_BLUE_VALUE:
 386          config->transparentBlue = *bp++;
 387          break;
 388       case GLX_TRANSPARENT_ALPHA_VALUE:
 389          config->transparentAlpha = *bp++;
 390          break;
 391       case GLX_VISUAL_ID:
 392          config->visualID = *bp++;
 393          break;
 394       case GLX_DRAWABLE_TYPE:
 395          config->drawableType = *bp++;
 396          break;
 397       case GLX_RENDER_TYPE:
 398          config->renderType = *bp++;
 399          break;
 400       case GLX_X_RENDERABLE:
 401          config->xRenderable = *bp++;
 402          break;
 403       case GLX_FBCONFIG_ID:
 404          config->fbconfigID = *bp++;
 405          break;
 406       case GLX_MAX_PBUFFER_WIDTH:
 407          config->maxPbufferWidth = *bp++;
 408          break;
 409       case GLX_MAX_PBUFFER_HEIGHT:
 410          config->maxPbufferHeight = *bp++;
 411          break;
 412       case GLX_MAX_PBUFFER_PIXELS:
 413          config->maxPbufferPixels = *bp++;
 414          break;
 415       case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
 416          config->optimalPbufferWidth = *bp++;
 417          break;
 418       case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
 419          config->optimalPbufferHeight = *bp++;
 420          break;
 421       case GLX_VISUAL_SELECT_GROUP_SGIX:
 422          config->visualSelectGroup = *bp++;
 423          break;
 424       case GLX_SWAP_METHOD_OML:
 425          config->swapMethod = *bp++;
 426          break;
 427       case GLX_SAMPLE_BUFFERS_SGIS:
 428          config->sampleBuffers = *bp++;
 429          break;
 430       case GLX_SAMPLES_SGIS:
 431          config->samples = *bp++;
 432          break;
 433       case GLX_BIND_TO_TEXTURE_RGB_EXT:
 434          config->bindToTextureRgb = *bp++;
 435          break;
 436       case GLX_BIND_TO_TEXTURE_RGBA_EXT:
 437          config->bindToTextureRgba = *bp++;
 438          break;
 439       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
 440          config->bindToMipmapTexture = *bp++;
 441          break;
 442       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
 443          config->bindToTextureTargets = *bp++;
 444          break;
 445       case GLX_Y_INVERTED_EXT:
 446          config->yInverted = *bp++;
 447          break;
 448       case None:
 449          i = count;
 450          break;
 451       default:
 452          break;
 453       }
 454    }
 455
 456    config->renderType =
 457       (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
 458
 459    config->haveAccumBuffer = ((config->accumRedBits +
 460                                config->accumGreenBits +
 461                                config->accumBlueBits +
 462                                config->accumAlphaBits) > 0);
 463    config->haveDepthBuffer = (config->depthBits > 0);
 464    config->haveStencilBuffer = (config->stencilBits > 0);
 465 }
 466
 467 static __GLcontextModes *
 468 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
 469                             int screen, GLboolean tagged_only)
 470 {
 471    INT32 buf[__GLX_TOTAL_CONFIG], *props;
 472    unsigned prop_size;
 473    __GLcontextModes *modes, *m;
 474    int i;
 475
 476    if (nprops == 0)
 477       return NULL;
 478
 479    /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
 480
 481    /* Check number of properties */
 482    if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
 483       return NULL;
 484
 485    /* Allocate memory for our config structure */
 486    modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
 487    if (!modes)
 488       return NULL;
 489
 490    prop_size = nprops * __GLX_SIZE_INT32;
 491    if (prop_size <= sizeof(buf))
 492       props = buf;
 493    else
 494       props = Xmalloc(prop_size);
 495
 496    /* Read each config structure and convert it into our format */
 497    m = modes;
 498    for (i = 0; i < nvisuals; i++) {
 499       _XRead(dpy, (char *) props, prop_size);
 500       /* Older X servers don't send this so we default it here. */
 501       m->drawableType = GLX_WINDOW_BIT;
 502       __glXInitializeVisualConfigFromTags(m, nprops, props,
 503                                           tagged_only, GL_TRUE);
 504       m->screen = screen;
 505       m = m->next;
 506    }
 507
 508    if (props != buf)
 509       Xfree(props);
 510
 511    return modes;
 512 }
 513
 514 static GLboolean
 515 getVisualConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
 516 {
 517    xGLXGetVisualConfigsReq *req;
 518    __GLXscreenConfigs *psc;
 519    xGLXGetVisualConfigsReply reply;
 520
 521    LockDisplay(dpy);
 522
 523    psc = priv->screenConfigs + screen;
 524    psc->visuals = NULL;
 525    GetReq(GLXGetVisualConfigs, req);
 526    req->reqType = priv->majorOpcode;
 527    req->glxCode = X_GLXGetVisualConfigs;
 528    req->screen = screen;
 529
 530    if (!_XReply(dpy, (xReply *) & reply, 0, False))
 531       goto out;
 532
 533    psc->visuals = createConfigsFromProperties(dpy,
 534                                               reply.numVisuals,
 535                                               reply.numProps,
 536                                               screen, GL_FALSE);
 537
 538  out:
 539    UnlockDisplay(dpy);
 540    return psc->visuals != NULL;
 541 }
 542
 543 static GLboolean
 544 getFBConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
 545 {
 546    xGLXGetFBConfigsReq *fb_req;
 547    xGLXGetFBConfigsSGIXReq *sgi_req;
 548    xGLXVendorPrivateWithReplyReq *vpreq;
 549    xGLXGetFBConfigsReply reply;
 550    __GLXscreenConfigs *psc;
 551
 552    psc = priv->screenConfigs + screen;
 553    psc->serverGLXexts = __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
 554
 555    LockDisplay(dpy);
 556
 557    psc->configs = NULL;
 558    if (atof(priv->serverGLXversion) >= 1.3) {
 559       GetReq(GLXGetFBConfigs, fb_req);
 560       fb_req->reqType = priv->majorOpcode;
 561       fb_req->glxCode = X_GLXGetFBConfigs;
 562       fb_req->screen = screen;
 563    }
 564    else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
 565       GetReqExtra(GLXVendorPrivateWithReply,
 566                   sz_xGLXGetFBConfigsSGIXReq +
 567                   sz_xGLXVendorPrivateWithReplyReq, vpreq);
 568       sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
 569       sgi_req->reqType = priv->majorOpcode;
 570       sgi_req->glxCode = X_GLXVendorPrivateWithReply;
 571       sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
 572       sgi_req->screen = screen;
 573    }
 574    else
 575       goto out;
 576
 577    if (!_XReply(dpy, (xReply *) & reply, 0, False))
 578       goto out;
 579
 580    psc->configs = createConfigsFromProperties(dpy,
 581                                               reply.numFBConfigs,
 582                                               reply.numAttribs * 2,
 583                                               screen, GL_TRUE);
 584
 585  out:
 586    UnlockDisplay(dpy);
 587    return psc->configs != NULL;
 588 }
 589
 590 /*
 591 ** Allocate the memory for the per screen configs for each screen.
 592 ** If that works then fetch the per screen configs data.
 593 */
 594 static Bool
 595 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
 596 {
 597    __GLXscreenConfigs *psc;
 598    GLint i, screens;
 599
 600    /*
 601     ** First allocate memory for the array of per screen configs.
 602     */
 603    screens = ScreenCount(dpy);
 604    psc = (__GLXscreenConfigs *) Xmalloc(screens * sizeof(__GLXscreenConfigs));
 605    if (!psc) {
 606       return GL_FALSE;
 607    }
 608    memset(psc, 0, screens * sizeof(__GLXscreenConfigs));
 609    priv->screenConfigs = psc;
 610
 611    priv->serverGLXversion = __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
 612    if (priv->serverGLXversion == NULL) {
 613       FreeScreenConfigs(priv);
 614       return GL_FALSE;
 615    }
 616
 617    for (i = 0; i < screens; i++, psc++) {
 618       getVisualConfigs(dpy, priv, i);
 619       getFBConfigs(dpy, priv, i);
 620
 621 #ifdef GLX_DIRECT_RENDERING
 622       psc->scr = i;
 623       psc->dpy = dpy;
 624       psc->drawHash = __glxHashCreate();
 625       if (psc->drawHash == NULL)
 626          continue;
 627
 628       if (priv->dri2Display)
 629          psc->driScreen = (*priv->dri2Display->createScreen) (psc, i, priv);
 630
 631       if (psc->driScreen == NULL && priv->driDisplay)
 632          psc->driScreen = (*priv->driDisplay->createScreen) (psc, i, priv);
 633
 634       if (psc->driScreen == NULL && priv->driswDisplay)
 635          psc->driScreen = (*priv->driswDisplay->createScreen) (psc, i, priv);
 636
 637       if (psc->driScreen == NULL) {
 638          __glxHashDestroy(psc->drawHash);
 639          psc->drawHash = NULL;
 640       }
 641 #endif
 642    }
 643    SyncHandle();
 644    return GL_TRUE;
 645 }
 646
 647 /*
 648 ** Initialize the client side extension code.
 649 */
 650 _X_HIDDEN __GLXdisplayPrivate *
 651 __glXInitialize(Display * dpy)
 652 {
 653    XExtDisplayInfo *info = __glXFindDisplay(dpy);
 654    XExtData **privList, *private, *found;
 655    __GLXdisplayPrivate *dpyPriv;
 656    XEDataObject dataObj;
 657    int major, minor;
 658 #ifdef GLX_DIRECT_RENDERING
 659    Bool glx_direct, glx_accel;
 660 #endif
 661
 662 #if defined(USE_XTHREADS)
 663    {
 664       static int firstCall = 1;
 665       if (firstCall) {
 666          /* initialize the GLX mutexes */
 667          xmutex_init(&__glXmutex);
 668          firstCall = 0;
 669       }
 670    }
 671 #endif
 672
 673    INIT_MESA_SPARC;
 674    /* The one and only long long lock */
 675    __glXLock();
 676
 677    if (!XextHasExtension(info)) {
 678       /* No GLX extension supported by this server. Oh well. */
 679       __glXUnlock();
 680       XMissingExtension(dpy, __glXExtensionName);
 681       return 0;
 682    }
 683
 684    /* See if a display private already exists.  If so, return it */
 685    dataObj.display = dpy;
 686    privList = XEHeadOfExtensionList(dataObj);
 687    found = XFindOnExtensionList(privList, info->codes->extension);
 688    if (found) {
 689       __glXUnlock();
 690       return (__GLXdisplayPrivate *) found->private_data;
 691    }
 692
 693    /* See if the versions are compatible */
 694    if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
 695       /* The client and server do not agree on versions.  Punt. */
 696       __glXUnlock();
 697       return 0;
 698    }
 699
 700    /*
 701     ** Allocate memory for all the pieces needed for this buffer.
 702     */
 703    private = (XExtData *) Xmalloc(sizeof(XExtData));
 704    if (!private) {
 705       __glXUnlock();
 706       return 0;
 707    }
 708    dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate));
 709    if (!dpyPriv) {
 710       __glXUnlock();
 711       Xfree((char *) private);
 712       return 0;
 713    }
 714
 715    /*
 716     ** Init the display private and then read in the screen config
 717     ** structures from the server.
 718     */
 719    dpyPriv->majorOpcode = info->codes->major_opcode;
 720    dpyPriv->majorVersion = major;
 721    dpyPriv->minorVersion = minor;
 722    dpyPriv->dpy = dpy;
 723
 724    dpyPriv->serverGLXvendor = 0x0;
 725    dpyPriv->serverGLXversion = 0x0;
 726
 727 #ifdef GLX_DIRECT_RENDERING
 728    glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
 729    glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
 730
 731    /*
 732     ** Initialize the direct rendering per display data and functions.
 733     ** Note: This _must_ be done before calling any other DRI routines
 734     ** (e.g., those called in AllocAndFetchScreenConfigs).
 735     */
 736    if (glx_direct && glx_accel) {
 737       dpyPriv->dri2Display = dri2CreateDisplay(dpy);
 738       dpyPriv->driDisplay = driCreateDisplay(dpy);
 739    }
 740    if (glx_direct)
 741       dpyPriv->driswDisplay = driswCreateDisplay(dpy);
 742 #endif
 743
 744    if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
 745       __glXUnlock();
 746       Xfree((char *) dpyPriv);
 747       Xfree((char *) private);
 748       return 0;
 749    }
 750
 751    /*
 752     ** Fill in the private structure.  This is the actual structure that
 753     ** hangs off of the Display structure.  Our private structure is
 754     ** referred to by this structure.  Got that?
 755     */
 756    private->number = info->codes->extension;
 757    private->next = 0;
 758    private->free_private = __glXFreeDisplayPrivate;
 759    private->private_data = (char *) dpyPriv;
 760    XAddToExtensionList(privList, private);
 761
 762    if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) {
 763       __glXClientInfo(dpy, dpyPriv->majorOpcode);
 764    }
 765    __glXUnlock();
 766
 767    return dpyPriv;
 768 }
 769
 770 /*
 771 ** Setup for sending a GLX command on dpy.  Make sure the extension is
 772 ** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
 773 */
 774 _X_HIDDEN CARD8
 775 __glXSetupForCommand(Display * dpy)
 776 {
 777    GLXContext gc;
 778    __GLXdisplayPrivate *priv;
 779
 780    /* If this thread has a current context, flush its rendering commands */
 781    gc = __glXGetCurrentContext();
 782    if (gc->currentDpy) {
 783       /* Flush rendering buffer of the current context, if any */
 784       (void) __glXFlushRenderBuffer(gc, gc->pc);
 785
 786       if (gc->currentDpy == dpy) {
 787          /* Use opcode from gc because its right */
 788          INIT_MESA_SPARC;
 789          return gc->majorOpcode;
 790       }
 791       else {
 792          /*
 793           ** Have to get info about argument dpy because it might be to
 794           ** a different server
 795           */
 796       }
 797    }
 798
 799    /* Forced to lookup extension via the slow initialize route */
 800    priv = __glXInitialize(dpy);
 801    if (!priv) {
 802       return 0;
 803    }
 804    return priv->majorOpcode;
 805 }
 806
 807 /**
 808  * Flush the drawing command transport buffer.
 809  *
 810  * \param ctx  Context whose transport buffer is to be flushed.
 811  * \param pc   Pointer to first unused buffer location.
 812  *
 813  * \todo
 814  * Modify this function to use \c ctx->pc instead of the explicit
 815  * \c pc parameter.
 816  */
 817 _X_HIDDEN GLubyte *
 818 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
 819 {
 820    Display *const dpy = ctx->currentDpy;
 821 #ifdef USE_XCB
 822    xcb_connection_t *c = XGetXCBConnection(dpy);
 823 #else
 824    xGLXRenderReq *req;
 825 #endif /* USE_XCB */
 826    const GLint size = pc - ctx->buf;
 827
 828    if ((dpy != NULL) && (size > 0)) {
 829 #ifdef USE_XCB
 830       xcb_glx_render(c, ctx->currentContextTag, size,
 831                      (const uint8_t *) ctx->buf);
 832 #else
 833       /* Send the entire buffer as an X request */
 834       LockDisplay(dpy);
 835       GetReq(GLXRender, req);
 836       req->reqType = ctx->majorOpcode;
 837       req->glxCode = X_GLXRender;
 838       req->contextTag = ctx->currentContextTag;
 839       req->length += (size + 3) >> 2;
 840       _XSend(dpy, (char *) ctx->buf, size);
 841       UnlockDisplay(dpy);
 842       SyncHandle();
 843 #endif
 844    }
 845
 846    /* Reset pointer and return it */
 847    ctx->pc = ctx->buf;
 848    return ctx->pc;
 849 }
 850
 851
 852 /**
 853  * Send a portion of a GLXRenderLarge command to the server.  The advantage of
 854  * this function over \c __glXSendLargeCommand is that callers can use the
 855  * data buffer in the GLX context and may be able to avoid allocating an
 856  * extra buffer.  The disadvantage is the clients will have to do more
 857  * GLX protocol work (i.e., calculating \c totalRequests, etc.).
 858  *
 859  * \sa __glXSendLargeCommand
 860  *
 861  * \param gc             GLX context
 862  * \param requestNumber  Which part of the whole command is this?  The first
 863  *                       request is 1.
 864  * \param totalRequests  How many requests will there be?
 865  * \param data           Command data.
 866  * \param dataLen        Size, in bytes, of the command data.
 867  */
 868 _X_HIDDEN void
 869 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
 870                     GLint totalRequests, const GLvoid * data, GLint dataLen)
 871 {
 872    Display *dpy = gc->currentDpy;
 873 #ifdef USE_XCB
 874    xcb_connection_t *c = XGetXCBConnection(dpy);
 875    xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
 876                         totalRequests, dataLen, data);
 877 #else
 878    xGLXRenderLargeReq *req;
 879
 880    if (requestNumber == 1) {
 881       LockDisplay(dpy);
 882    }
 883
 884    GetReq(GLXRenderLarge, req);
 885    req->reqType = gc->majorOpcode;
 886    req->glxCode = X_GLXRenderLarge;
 887    req->contextTag = gc->currentContextTag;
 888    req->length += (dataLen + 3) >> 2;
 889    req->requestNumber = requestNumber;
 890    req->requestTotal = totalRequests;
 891    req->dataBytes = dataLen;
 892    Data(dpy, data, dataLen);
 893
 894    if (requestNumber == totalRequests) {
 895       UnlockDisplay(dpy);
 896       SyncHandle();
 897    }
 898 #endif /* USE_XCB */
 899 }
 900
 901
 902 /**
 903  * Send a command that is too large for the GLXRender protocol request.
 904  *
 905  * Send a large command, one that is too large for some reason to
 906  * send using the GLXRender protocol request.  One reason to send
 907  * a large command is to avoid copying the data.
 908  *
 909  * \param ctx        GLX context
 910  * \param header     Header data.
 911  * \param headerLen  Size, in bytes, of the header data.  It is assumed that
 912  *                   the header data will always be small enough to fit in
 913  *                   a single X protocol packet.
 914  * \param data       Command data.
 915  * \param dataLen    Size, in bytes, of the command data.
 916  */
 917 _X_HIDDEN void
 918 __glXSendLargeCommand(__GLXcontext * ctx,
 919                       const GLvoid * header, GLint headerLen,
 920                       const GLvoid * data, GLint dataLen)
 921 {
 922    GLint maxSize;
 923    GLint totalRequests, requestNumber;
 924
 925    /*
 926     ** Calculate the maximum amount of data can be stuffed into a single
 927     ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
 928     ** packet size minus sz_xGLXRenderReq.
 929     */
 930    maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
 931    totalRequests = 1 + (dataLen / maxSize);
 932    if (dataLen % maxSize)
 933       totalRequests++;
 934
 935    /*
 936     ** Send all of the command, except the large array, as one request.
 937     */
 938    assert(headerLen <= maxSize);
 939    __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
 940
 941    /*
 942     ** Send enough requests until the whole array is sent.
 943     */
 944    for (requestNumber = 2; requestNumber <= (totalRequests - 1);
 945         requestNumber++) {
 946       __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
 947       data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
 948       dataLen -= maxSize;
 949       assert(dataLen > 0);
 950    }
 951
 952    assert(dataLen <= maxSize);
 953    __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
 954 }
 955
 956 /************************************************************************/
 957
 958 #ifdef DEBUG
 959 _X_HIDDEN void
 960 __glXDumpDrawBuffer(__GLXcontext * ctx)
 961 {
 962    GLubyte *p = ctx->buf;
 963    GLubyte *end = ctx->pc;
 964    GLushort opcode, length;
 965
 966    while (p < end) {
 967       /* Fetch opcode */
 968       opcode = *((GLushort *) p);
 969       length = *((GLushort *) (p + 2));
 970       printf("%2x: %5d: ", opcode, length);
 971       length -= 4;
 972       p += 4;
 973       while (length > 0) {
 974          printf("%08x ", *((unsigned *) p));
 975          p += 4;
 976          length -= 4;
 977       }
 978       printf("\n");
 979    }
 980 }
 981 #endif
 982
 983 #ifdef  USE_SPARC_ASM
 984 /*
 985  * This is where our dispatch table's bounds are.
 986  * And the static mesa_init is taken directly from
 987  * Mesa's 'sparc.c' initializer.
 988  *
 989  * We need something like this here, because this version
 990  * of openGL/glx never initializes a Mesa context, and so
 991  * the address of the dispatch table pointer never gets stuffed
 992  * into the dispatch jump table otherwise.
 993  *
 994  * It matters only on SPARC, and only if you are using assembler
 995  * code instead of C-code indirect dispatch.
 996  *
 997  * -- FEM, 04.xii.03
 998  */
 999 extern unsigned int _mesa_sparc_glapi_begin;
1000 extern unsigned int _mesa_sparc_glapi_end;
1001 extern void __glapi_sparc_icache_flush(unsigned int *);
1002
1003 static void
1004 _glx_mesa_init_sparc_glapi_relocs(void)
1005 {
1006    unsigned int *insn_ptr, *end_ptr;
1007    unsigned long disp_addr;
1008
1009    insn_ptr = &_mesa_sparc_glapi_begin;
1010    end_ptr = &_mesa_sparc_glapi_end;
1011    disp_addr = (unsigned long) &_glapi_Dispatch;
1012
1013    /*
1014     * Verbatim from Mesa sparc.c.  It's needed because there doesn't
1015     * seem to be a better way to do this:
1016     *
1017     * UNCONDITIONAL_JUMP ( (*_glapi_Dispatch) + entry_offset )
1018     *
1019     * This code is patching in the ADDRESS of the pointer to the
1020     * dispatch table.  Hence, it must be called exactly once, because
1021     * that address is not going to change.
1022     *
1023     * What it points to can change, but Mesa (and hence, we) assume
1024     * that there is only one pointer.
1025     *
1026     */
1027    while (insn_ptr < end_ptr) {
1028 #if ( defined(__sparc_v9__) && ( !defined(__linux__) || defined(__linux_64__) ) )
1029 /*
1030         This code patches for 64-bit addresses.  This had better
1031         not happen for Sparc/Linux, no matter what architecture we
1032         are building for.  So, don't do this.
1033
1034         The 'defined(__linux_64__)' is used here as a placeholder for
1035         when we do do 64-bit usermode on sparc linux.
1036         */
1037       insn_ptr[0] |= (disp_addr >> (32 + 10));
1038       insn_ptr[1] |= ((disp_addr & 0xffffffff) >> 10);
1039       __glapi_sparc_icache_flush(&insn_ptr[0]);
1040       insn_ptr[2] |= ((disp_addr >> 32) & ((1 << 10) - 1));
1041       insn_ptr[3] |= (disp_addr & ((1 << 10) - 1));
1042       __glapi_sparc_icache_flush(&insn_ptr[2]);
1043       insn_ptr += 11;
1044 #else
1045       insn_ptr[0] |= (disp_addr >> 10);
1046       insn_ptr[1] |= (disp_addr & ((1 << 10) - 1));
1047       __glapi_sparc_icache_flush(&insn_ptr[0]);
1048       insn_ptr += 5;
1049 #endif
1050    }
1051 }
1052 #endif /* sparc ASM in use */