src/gallium/state_trackers/glx/xlib/glx_api.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.6
   4  *
   5  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * 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  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /**
  28  * "Fake" GLX API implemented in terms of the XMesa*() functions.
  29  */
  30
  31
  32
  33 #define GLX_GLXEXT_PROTOTYPES
  34 #include "GL/glx.h"
  35
  36 #include "xm_api.h"
  37
  38
  39 /* This indicates the client-side GLX API and GLX encoder version. */
  40 #define CLIENT_MAJOR_VERSION 1
  41 #define CLIENT_MINOR_VERSION 4  /* but don't have 1.3's pbuffers, etc yet */
  42
  43 /* This indicates the server-side GLX decoder version.
  44  * GLX 1.4 indicates OpenGL 1.3 support
  45  */
  46 #define SERVER_MAJOR_VERSION 1
  47 #define SERVER_MINOR_VERSION 4
  48
  49 /* This is appended onto the glXGetClient/ServerString version strings. */
  50 #define MESA_GLX_VERSION "Mesa " MESA_VERSION_STRING
  51
  52 /* Who implemented this GLX? */
  53 #define VENDOR "Brian Paul"
  54
  55 #define EXTENSIONS \
  56    "GLX_MESA_copy_sub_buffer " \
  57    "GLX_MESA_pixmap_colormap " \
  58    "GLX_MESA_release_buffers " \
  59    "GLX_ARB_get_proc_address " \
  60    "GLX_EXT_texture_from_pixmap " \
  61    "GLX_EXT_visual_info " \
  62    "GLX_EXT_visual_rating " \
  63    /*"GLX_SGI_video_sync "*/ \
  64    "GLX_SGIX_fbconfig " \
  65    "GLX_SGIX_pbuffer "
  66
  67 #define DEFAULT_DIRECT GL_TRUE
  68
  69
  70
  71 /**
  72  * The GLXContext typedef is defined as a pointer to this structure.
  73  */
  74 struct __GLXcontextRec
  75 {
  76    Display *currentDpy;
  77    GLboolean isDirect;
  78    GLXDrawable currentDrawable;
  79    GLXDrawable currentReadable;
  80    XID xid;
  81
  82    XMesaContext xmesaContext;
  83 };
  84
  85
  86
  87 static pipe_tsd ContextTSD;
  88
  89 /** Set current context for calling thread */
  90 static void
  91 SetCurrentContext(GLXContext c)
  92 {
  93    pipe_tsd_set(&ContextTSD, c);
  94 }
  95
  96 /** Get current context for calling thread */
  97 static GLXContext
  98 GetCurrentContext(void)
  99 {
 100    return pipe_tsd_get(&ContextTSD);
 101 }
 102
 103
 104
 105 /**********************************************************************/
 106 /***                       GLX Visual Code                          ***/
 107 /**********************************************************************/
 108
 109 #define DONT_CARE -1
 110
 111
 112 static XMesaVisual *VisualTable = NULL;
 113 static int NumVisuals = 0;
 114
 115
 116
 117 /* Macro to handle c_class vs class field name in XVisualInfo struct */
 118 #if defined(__cplusplus) || defined(c_plusplus)
 119 #define CLASS c_class
 120 #else
 121 #define CLASS class
 122 #endif
 123
 124
 125
 126 /*
 127  * Test if the given XVisualInfo is usable for Mesa rendering.
 128  */
 129 static GLboolean
 130 is_usable_visual( XVisualInfo *vinfo )
 131 {
 132    switch (vinfo->CLASS) {
 133       case StaticGray:
 134       case GrayScale:
 135          /* Any StaticGray/GrayScale visual works in RGB or CI mode */
 136          return GL_TRUE;
 137       case StaticColor:
 138       case PseudoColor:
 139          /* Any StaticColor/PseudoColor visual of at least 4 bits */
 140          if (vinfo->depth>=4) {
 141             return GL_TRUE;
 142          }
 143          else {
 144             return GL_FALSE;
 145          }
 146       case TrueColor:
 147       case DirectColor:
 148          /* Any depth of TrueColor or DirectColor works in RGB mode */
 149          return GL_TRUE;
 150       default:
 151          /* This should never happen */
 152          return GL_FALSE;
 153    }
 154 }
 155
 156
 157 /*
 158  * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
 159  * configuration in our list of GLX visuals.
 160  */
 161 static XMesaVisual
 162 save_glx_visual( Display *dpy, XVisualInfo *vinfo,
 163                  GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
 164                  GLboolean stereoFlag,
 165                  GLint depth_size, GLint stencil_size,
 166                  GLint accumRedSize, GLint accumGreenSize,
 167                  GLint accumBlueSize, GLint accumAlphaSize,
 168                  GLint level, GLint numAuxBuffers )
 169 {
 170    GLboolean ximageFlag = GL_TRUE;
 171    XMesaVisual xmvis;
 172    GLint i;
 173    GLboolean comparePointers;
 174
 175    if (dbFlag) {
 176       /* Check if the MESA_BACK_BUFFER env var is set */
 177       char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
 178       if (backbuffer) {
 179          if (backbuffer[0]=='p' || backbuffer[0]=='P') {
 180             ximageFlag = GL_FALSE;
 181          }
 182          else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
 183             ximageFlag = GL_TRUE;
 184          }
 185          else {
 186             _mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
 187          }
 188       }
 189    }
 190
 191    if (stereoFlag) {
 192       /* stereo not supported */
 193       return NULL;
 194    }
 195
 196    if (stencil_size > 0 && depth_size > 0)
 197       depth_size = 24;
 198
 199    /* Comparing IDs uses less memory but sometimes fails. */
 200    /* XXX revisit this after 3.0 is finished. */
 201    if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
 202       comparePointers = GL_TRUE;
 203    else
 204       comparePointers = GL_FALSE;
 205
 206    /* Force the visual to have an alpha channel */
 207    if (rgbFlag && _mesa_getenv("MESA_GLX_FORCE_ALPHA"))
 208       alphaFlag = GL_TRUE;
 209
 210    /* First check if a matching visual is already in the list */
 211    for (i=0; i<NumVisuals; i++) {
 212       XMesaVisual v = VisualTable[i];
 213       if (v->display == dpy
 214           && v->mesa_visual.level == level
 215           && v->mesa_visual.numAuxBuffers == numAuxBuffers
 216           && v->ximage_flag == ximageFlag
 217           && v->mesa_visual.rgbMode == rgbFlag
 218           && v->mesa_visual.doubleBufferMode == dbFlag
 219           && v->mesa_visual.stereoMode == stereoFlag
 220           && (v->mesa_visual.alphaBits > 0) == alphaFlag
 221           && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
 222           && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
 223           && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
 224           && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
 225           && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
 226           && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
 227          /* now either compare XVisualInfo pointers or visual IDs */
 228          if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
 229              || (comparePointers && v->vishandle == vinfo)) {
 230             return v;
 231          }
 232       }
 233    }
 234
 235    /* Create a new visual and add it to the list. */
 236
 237    xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
 238                               stereoFlag, ximageFlag,
 239                               depth_size, stencil_size,
 240                               accumRedSize, accumBlueSize,
 241                               accumBlueSize, accumAlphaSize, 0, level,
 242                               GLX_NONE_EXT );
 243    if (xmvis) {
 244       /* Save a copy of the pointer now so we can find this visual again
 245        * if we need to search for it in find_glx_visual().
 246        */
 247       xmvis->vishandle = vinfo;
 248       /* Allocate more space for additional visual */
 249       VisualTable = (XMesaVisual *) _mesa_realloc( VisualTable,
 250                                    sizeof(XMesaVisual) * NumVisuals,
 251                                    sizeof(XMesaVisual) * (NumVisuals + 1));
 252       /* add xmvis to the list */
 253       VisualTable[NumVisuals] = xmvis;
 254       NumVisuals++;
 255       /* XXX minor hack, because XMesaCreateVisual doesn't support an
 256        * aux buffers parameter.
 257        */
 258       xmvis->mesa_visual.numAuxBuffers = numAuxBuffers;
 259    }
 260    return xmvis;
 261 }
 262
 263
 264 /**
 265  * Return the default number of bits for the Z buffer.
 266  * If defined, use the MESA_GLX_DEPTH_BITS env var value.
 267  * Otherwise, use the DEFAULT_SOFTWARE_DEPTH_BITS constant.
 268  * XXX probably do the same thing for stencil, accum, etc.
 269  */
 270 static GLint
 271 default_depth_bits(void)
 272 {
 273    int zBits;
 274    const char *zEnv = _mesa_getenv("MESA_GLX_DEPTH_BITS");
 275    if (zEnv)
 276       zBits = atoi(zEnv);
 277    else
 278       zBits = DEFAULT_SOFTWARE_DEPTH_BITS;
 279    return zBits;
 280 }
 281
 282 static GLint
 283 default_alpha_bits(void)
 284 {
 285    int aBits;
 286    const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS");
 287    if (aEnv)
 288       aBits = atoi(aEnv);
 289    else
 290       aBits = 0;
 291    return aBits;
 292 }
 293
 294 static GLint
 295 default_accum_bits(void)
 296 {
 297    return 16;
 298 }
 299
 300
 301
 302 /*
 303  * Create a GLX visual from a regular XVisualInfo.
 304  * This is called when Fake GLX is given an XVisualInfo which wasn't
 305  * returned by glXChooseVisual.  Since this is the first time we're
 306  * considering this visual we'll take a guess at reasonable values
 307  * for depth buffer size, stencil size, accum size, etc.
 308  * This is the best we can do with a client-side emulation of GLX.
 309  */
 310 static XMesaVisual
 311 create_glx_visual( Display *dpy, XVisualInfo *visinfo )
 312 {
 313    GLint zBits = default_depth_bits();
 314    GLint accBits = default_accum_bits();
 315    GLboolean alphaFlag = default_alpha_bits() > 0;
 316
 317    if (is_usable_visual( visinfo )) {
 318       /* Configure this visual as RGB, double-buffered, depth-buffered. */
 319       /* This is surely wrong for some people's needs but what else */
 320       /* can be done?  They should use glXChooseVisual(). */
 321       return save_glx_visual( dpy, visinfo,
 322                               GL_TRUE,   /* rgb */
 323                               alphaFlag, /* alpha */
 324                               GL_TRUE,   /* double */
 325                               GL_FALSE,  /* stereo */
 326                               zBits,
 327                               STENCIL_BITS,
 328                               accBits, /* r */
 329                               accBits, /* g */
 330                               accBits, /* b */
 331                               accBits, /* a */
 332                               0,         /* level */
 333                               0          /* numAux */
 334          );
 335    }
 336    else {
 337       _mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
 338       return NULL;
 339    }
 340 }
 341
 342
 343
 344 /*
 345  * Find the GLX visual associated with an XVisualInfo.
 346  */
 347 static XMesaVisual
 348 find_glx_visual( Display *dpy, XVisualInfo *vinfo )
 349 {
 350    int i;
 351
 352    /* try to match visual id */
 353    for (i=0;i<NumVisuals;i++) {
 354       if (VisualTable[i]->display==dpy
 355           && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
 356          return VisualTable[i];
 357       }
 358    }
 359
 360    /* if that fails, try to match pointers */
 361    for (i=0;i<NumVisuals;i++) {
 362       if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
 363          return VisualTable[i];
 364       }
 365    }
 366
 367    return NULL;
 368 }
 369
 370
 371 /**
 372  * Try to get an X visual which matches the given arguments.
 373  */
 374 static XVisualInfo *
 375 get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
 376 {
 377    XVisualInfo temp, *vis;
 378    long mask;
 379    int n;
 380    unsigned int default_depth;
 381    int default_class;
 382
 383    mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
 384    temp.screen = scr;
 385    temp.depth = depth;
 386    temp.CLASS = xclass;
 387
 388    default_depth = DefaultDepth(dpy,scr);
 389    default_class = DefaultVisual(dpy,scr)->CLASS;
 390
 391    if (depth==default_depth && xclass==default_class) {
 392       /* try to get root window's visual */
 393       temp.visualid = DefaultVisual(dpy,scr)->visualid;
 394       mask |= VisualIDMask;
 395    }
 396
 397    vis = XGetVisualInfo( dpy, mask, &temp, &n );
 398
 399    /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
 400     * An SGI Infinite Reality system, for example, can have 30bpp pixels:
 401     * 10 bits per color channel.  Mesa's limited to a max of 8 bits/channel.
 402     */
 403    if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
 404       if (_mesa_bitcount((GLuint) vis->red_mask  ) <= 8 &&
 405           _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
 406           _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
 407          return vis;
 408       }
 409       else {
 410          XFree((void *) vis);
 411          return NULL;
 412       }
 413    }
 414
 415    return vis;
 416 }
 417
 418
 419 /*
 420  * Retrieve the value of the given environment variable and find
 421  * the X visual which matches it.
 422  * Input:  dpy - the display
 423  *         screen - the screen number
 424  *         varname - the name of the environment variable
 425  * Return:  an XVisualInfo pointer to NULL if error.
 426  */
 427 static XVisualInfo *
 428 get_env_visual(Display *dpy, int scr, const char *varname)
 429 {
 430    char value[100], type[100];
 431    int depth, xclass = -1;
 432    XVisualInfo *vis;
 433
 434    if (!_mesa_getenv( varname )) {
 435       return NULL;
 436    }
 437
 438    strncpy( value, _mesa_getenv(varname), 100 );
 439    value[99] = 0;
 440
 441    sscanf( value, "%s %d", type, &depth );
 442
 443    if (strcmp(type,"TrueColor")==0)          xclass = TrueColor;
 444    else if (strcmp(type,"DirectColor")==0)   xclass = DirectColor;
 445    else if (strcmp(type,"PseudoColor")==0)   xclass = PseudoColor;
 446    else if (strcmp(type,"StaticColor")==0)   xclass = StaticColor;
 447    else if (strcmp(type,"GrayScale")==0)     xclass = GrayScale;
 448    else if (strcmp(type,"StaticGray")==0)    xclass = StaticGray;
 449
 450    if (xclass>-1 && depth>0) {
 451       vis = get_visual( dpy, scr, depth, xclass );
 452       if (vis) {
 453          return vis;
 454       }
 455    }
 456
 457    _mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
 458                  type, depth);
 459
 460    return NULL;
 461 }
 462
 463
 464
 465 /*
 466  * Select an X visual which satisfies the RGBA flag and minimum depth.
 467  * Input:  dpy,
 468  *         screen - X display and screen number
 469  *         min_depth - minimum visual depth
 470  *         preferred_class - preferred GLX visual class or DONT_CARE
 471  * Return:  pointer to an XVisualInfo or NULL.
 472  */
 473 static XVisualInfo *
 474 choose_x_visual( Display *dpy, int screen, int min_depth,
 475                  int preferred_class )
 476 {
 477    XVisualInfo *vis;
 478    int xclass, visclass = 0;
 479    int depth;
 480
 481    /* First see if the MESA_RGB_VISUAL env var is defined */
 482    vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
 483    if (vis) {
 484       return vis;
 485    }
 486    /* Otherwise, search for a suitable visual */
 487    if (preferred_class==DONT_CARE) {
 488       for (xclass=0;xclass<6;xclass++) {
 489          switch (xclass) {
 490          case 0:  visclass = TrueColor;    break;
 491          case 1:  visclass = DirectColor;  break;
 492          case 2:  visclass = PseudoColor;  break;
 493          case 3:  visclass = StaticColor;  break;
 494          case 4:  visclass = GrayScale;    break;
 495          case 5:  visclass = StaticGray;   break;
 496          }
 497          if (min_depth==0) {
 498             /* start with shallowest */
 499             for (depth=0;depth<=32;depth++) {
 500                if (visclass==TrueColor && depth==8) {
 501                   /* Special case:  try to get 8-bit PseudoColor before */
 502                   /* 8-bit TrueColor */
 503                   vis = get_visual( dpy, screen, 8, PseudoColor );
 504                   if (vis) {
 505                      return vis;
 506                   }
 507                }
 508                vis = get_visual( dpy, screen, depth, visclass );
 509                if (vis) {
 510                   return vis;
 511                }
 512             }
 513          }
 514          else {
 515             /* start with deepest */
 516             for (depth=32;depth>=min_depth;depth--) {
 517                if (visclass==TrueColor && depth==8) {
 518                   /* Special case:  try to get 8-bit PseudoColor before */
 519                   /* 8-bit TrueColor */
 520                   vis = get_visual( dpy, screen, 8, PseudoColor );
 521                   if (vis) {
 522                      return vis;
 523                   }
 524                }
 525                vis = get_visual( dpy, screen, depth, visclass );
 526                if (vis) {
 527                   return vis;
 528                }
 529             }
 530          }
 531       }
 532    }
 533    else {
 534       /* search for a specific visual class */
 535       switch (preferred_class) {
 536       case GLX_TRUE_COLOR_EXT:    visclass = TrueColor;    break;
 537       case GLX_DIRECT_COLOR_EXT:  visclass = DirectColor;  break;
 538       case GLX_PSEUDO_COLOR_EXT:  visclass = PseudoColor;  break;
 539       case GLX_STATIC_COLOR_EXT:  visclass = StaticColor;  break;
 540       case GLX_GRAY_SCALE_EXT:    visclass = GrayScale;    break;
 541       case GLX_STATIC_GRAY_EXT:   visclass = StaticGray;   break;
 542       default:   return NULL;
 543       }
 544       if (min_depth==0) {
 545          /* start with shallowest */
 546          for (depth=0;depth<=32;depth++) {
 547             vis = get_visual( dpy, screen, depth, visclass );
 548             if (vis) {
 549                return vis;
 550             }
 551          }
 552       }
 553       else {
 554          /* start with deepest */
 555          for (depth=32;depth>=min_depth;depth--) {
 556             vis = get_visual( dpy, screen, depth, visclass );
 557             if (vis) {
 558                return vis;
 559             }
 560          }
 561       }
 562    }
 563
 564    /* didn't find a visual */
 565    return NULL;
 566 }
 567
 568
 569
 570
 571 /**********************************************************************/
 572 /***             Display-related functions                          ***/
 573 /**********************************************************************/
 574
 575
 576 /**
 577  * Free all XMesaVisuals which are associated with the given display.
 578  */
 579 static void
 580 destroy_visuals_on_display(Display *dpy)
 581 {
 582    int i;
 583    for (i = 0; i < NumVisuals; i++) {
 584       if (VisualTable[i]->display == dpy) {
 585          /* remove this visual */
 586          int j;
 587          free(VisualTable[i]);
 588          for (j = i; j < NumVisuals - 1; j++)
 589             VisualTable[j] = VisualTable[j + 1];
 590          NumVisuals--;
 591       }
 592    }
 593 }
 594
 595
 596 /**
 597  * Called from XCloseDisplay() to let us free our display-related data.
 598  */
 599 static int
 600 close_display_callback(Display *dpy, XExtCodes *codes)
 601 {
 602    xmesa_destroy_buffers_on_display(dpy);
 603    destroy_visuals_on_display(dpy);
 604    return 0;
 605 }
 606
 607
 608 /**
 609  * Look for the named extension on given display and return a pointer
 610  * to the _XExtension data, or NULL if extension not found.
 611  */
 612 static _XExtension *
 613 lookup_extension(Display *dpy, const char *extName)
 614 {
 615    _XExtension *ext;
 616    for (ext = dpy->ext_procs; ext; ext = ext->next) {
 617       if (ext->name && strcmp(ext->name, extName) == 0) {
 618          return ext;
 619       }
 620    }
 621    return NULL;
 622 }
 623
 624
 625 /**
 626  * Whenever we're given a new Display pointer, call this function to
 627  * register our close_display_callback function.
 628  */
 629 static void
 630 register_with_display(Display *dpy)
 631 {
 632    const char *extName = "MesaGLX";
 633    _XExtension *ext;
 634
 635    ext = lookup_extension(dpy, extName);
 636    if (!ext) {
 637       XExtCodes *c = XAddExtension(dpy);
 638       ext = dpy->ext_procs;  /* new extension is at head of list */
 639       assert(c->extension == ext->codes.extension);
 640       (void) c;
 641       ext->name = _mesa_strdup(extName);
 642       ext->close_display = close_display_callback;
 643    }
 644 }
 645
 646
 647 /**********************************************************************/
 648 /***                  Begin Fake GLX API Functions                  ***/
 649 /**********************************************************************/
 650
 651
 652 /**
 653  * Helper used by glXChooseVisual and glXChooseFBConfig.
 654  * The fbConfig parameter must be GL_FALSE for the former and GL_TRUE for
 655  * the later.
 656  * In either case, the attribute list is terminated with the value 'None'.
 657  */
 658 static XMesaVisual
 659 choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig )
 660 {
 661    const GLboolean rgbModeDefault = fbConfig;
 662    const int *parselist;
 663    XVisualInfo *vis;
 664    int min_ci = 0;
 665    int min_red=0, min_green=0, min_blue=0;
 666    GLboolean rgb_flag = rgbModeDefault;
 667    GLboolean alpha_flag = GL_FALSE;
 668    GLboolean double_flag = GL_FALSE;
 669    GLboolean stereo_flag = GL_FALSE;
 670    GLint depth_size = 0;
 671    GLint stencil_size = 0;
 672    GLint accumRedSize = 0;
 673    GLint accumGreenSize = 0;
 674    GLint accumBlueSize = 0;
 675    GLint accumAlphaSize = 0;
 676    int level = 0;
 677    int visual_type = DONT_CARE;
 678    int trans_type = DONT_CARE;
 679    int trans_value = DONT_CARE;
 680    GLint caveat = DONT_CARE;
 681    XMesaVisual xmvis = NULL;
 682    int desiredVisualID = -1;
 683    int numAux = 0;
 684
 685    xmesa_init( dpy );
 686
 687    parselist = list;
 688
 689    while (*parselist) {
 690
 691       switch (*parselist) {
 692          case GLX_USE_GL:
 693             if (fbConfig) {
 694                /* invalid token */
 695                return NULL;
 696             }
 697             else {
 698                /* skip */
 699                parselist++;
 700             }
 701             break;
 702          case GLX_BUFFER_SIZE:
 703             parselist++;
 704             min_ci = *parselist++;
 705             break;
 706          case GLX_LEVEL:
 707             parselist++;
 708             level = *parselist++;
 709             break;
 710          case GLX_RGBA:
 711             if (fbConfig) {
 712                /* invalid token */
 713                return NULL;
 714             }
 715             else {
 716                rgb_flag = GL_TRUE;
 717                parselist++;
 718             }
 719             break;
 720          case GLX_DOUBLEBUFFER:
 721             parselist++;
 722             if (fbConfig) {
 723                double_flag = *parselist++;
 724             }
 725             else {
 726                double_flag = GL_TRUE;
 727             }
 728             break;
 729          case GLX_STEREO:
 730             parselist++;
 731             if (fbConfig) {
 732                stereo_flag = *parselist++;
 733             }
 734             else {
 735                stereo_flag = GL_TRUE;
 736             }
 737             break;
 738          case GLX_AUX_BUFFERS:
 739             parselist++;
 740             numAux = *parselist++;
 741             if (numAux > MAX_AUX_BUFFERS)
 742                return NULL;
 743             break;
 744          case GLX_RED_SIZE:
 745             parselist++;
 746             min_red = *parselist++;
 747             break;
 748          case GLX_GREEN_SIZE:
 749             parselist++;
 750             min_green = *parselist++;
 751             break;
 752          case GLX_BLUE_SIZE:
 753             parselist++;
 754             min_blue = *parselist++;
 755             break;
 756          case GLX_ALPHA_SIZE:
 757             parselist++;
 758             {
 759                GLint size = *parselist++;
 760                alpha_flag = size ? GL_TRUE : GL_FALSE;
 761             }
 762             break;
 763          case GLX_DEPTH_SIZE:
 764             parselist++;
 765             depth_size = *parselist++;
 766             break;
 767          case GLX_STENCIL_SIZE:
 768             parselist++;
 769             stencil_size = *parselist++;
 770             break;
 771          case GLX_ACCUM_RED_SIZE:
 772             parselist++;
 773             {
 774                GLint size = *parselist++;
 775                accumRedSize = MAX2( accumRedSize, size );
 776             }
 777             break;
 778          case GLX_ACCUM_GREEN_SIZE:
 779             parselist++;
 780             {
 781                GLint size = *parselist++;
 782                accumGreenSize = MAX2( accumGreenSize, size );
 783             }
 784             break;
 785          case GLX_ACCUM_BLUE_SIZE:
 786             parselist++;
 787             {
 788                GLint size = *parselist++;
 789                accumBlueSize = MAX2( accumBlueSize, size );
 790             }
 791             break;
 792          case GLX_ACCUM_ALPHA_SIZE:
 793             parselist++;
 794             {
 795                GLint size = *parselist++;
 796                accumAlphaSize = MAX2( accumAlphaSize, size );
 797             }
 798             break;
 799
 800          /*
 801           * GLX_EXT_visual_info extension
 802           */
 803          case GLX_X_VISUAL_TYPE_EXT:
 804             parselist++;
 805             visual_type = *parselist++;
 806             break;
 807          case GLX_TRANSPARENT_TYPE_EXT:
 808             parselist++;
 809             trans_type = *parselist++;
 810             break;
 811          case GLX_TRANSPARENT_INDEX_VALUE_EXT:
 812             parselist++;
 813             trans_value = *parselist++;
 814             break;
 815          case GLX_TRANSPARENT_RED_VALUE_EXT:
 816          case GLX_TRANSPARENT_GREEN_VALUE_EXT:
 817          case GLX_TRANSPARENT_BLUE_VALUE_EXT:
 818          case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
 819             /* ignore */
 820             parselist++;
 821             parselist++;
 822             break;
 823
 824          /*
 825           * GLX_EXT_visual_info extension
 826           */
 827          case GLX_VISUAL_CAVEAT_EXT:
 828             parselist++;
 829             caveat = *parselist++; /* ignored for now */
 830             break;
 831
 832          /*
 833           * GLX_ARB_multisample
 834           */
 835          case GLX_SAMPLE_BUFFERS_ARB:
 836             /* ms not supported */
 837             return NULL;
 838          case GLX_SAMPLES_ARB:
 839             /* ms not supported */
 840             return NULL;
 841
 842          /*
 843           * FBConfig attribs.
 844           */
 845          case GLX_RENDER_TYPE:
 846             if (!fbConfig)
 847                return NULL;
 848             parselist++;
 849             if (*parselist & GLX_RGBA_BIT) {
 850                rgb_flag = GL_TRUE;
 851             }
 852             else if (*parselist & GLX_COLOR_INDEX_BIT) {
 853                rgb_flag = GL_FALSE;
 854             }
 855             else if (*parselist == 0) {
 856                rgb_flag = GL_TRUE;
 857             }
 858             parselist++;
 859             break;
 860          case GLX_DRAWABLE_TYPE:
 861             if (!fbConfig)
 862                return NULL;
 863             parselist++;
 864             if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
 865                return NULL; /* bad bit */
 866             }
 867             parselist++;
 868             break;
 869          case GLX_FBCONFIG_ID:
 870             if (!fbConfig)
 871                return NULL;
 872             parselist++;
 873             desiredVisualID = *parselist++;
 874             break;
 875          case GLX_X_RENDERABLE:
 876             if (!fbConfig)
 877                return NULL;
 878             parselist += 2;
 879             /* ignore */
 880             break;
 881
 882 #ifdef GLX_EXT_texture_from_pixmap
 883          case GLX_BIND_TO_TEXTURE_RGB_EXT:
 884             parselist++; /*skip*/
 885             break;
 886          case GLX_BIND_TO_TEXTURE_RGBA_EXT:
 887             parselist++; /*skip*/
 888             break;
 889          case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
 890             parselist++; /*skip*/
 891             break;
 892          case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
 893             parselist++;
 894             if (*parselist & ~(GLX_TEXTURE_1D_BIT_EXT |
 895                                GLX_TEXTURE_2D_BIT_EXT |
 896                                GLX_TEXTURE_RECTANGLE_BIT_EXT)) {
 897                /* invalid bit */
 898                return NULL;
 899             }
 900             break;
 901          case GLX_Y_INVERTED_EXT:
 902             parselist++; /*skip*/
 903             break;
 904 #endif
 905
 906          case None:
 907             /* end of list */
 908             break;
 909
 910          default:
 911             /* undefined attribute */
 912             _mesa_warning(NULL, "unexpected attrib 0x%x in choose_visual()",
 913                           *parselist);
 914             return NULL;
 915       }
 916    }
 917
 918    (void) caveat;
 919
 920
 921    /*
 922     * Since we're only simulating the GLX extension this function will never
 923     * find any real GL visuals.  Instead, all we can do is try to find an RGB
 924     * or CI visual of appropriate depth.  Other requested attributes such as
 925     * double buffering, depth buffer, etc. will be associated with the X
 926     * visual and stored in the VisualTable[].
 927     */
 928    if (desiredVisualID != -1) {
 929       /* try to get a specific visual, by visualID */
 930       XVisualInfo temp;
 931       int n;
 932       temp.visualid = desiredVisualID;
 933       temp.screen = screen;
 934       vis = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask, &temp, &n);
 935       if (vis) {
 936          /* give the visual some useful GLX attributes */
 937          double_flag = GL_TRUE;
 938          rgb_flag = GL_TRUE;
 939       }
 940    }
 941    else if (level==0) {
 942       /* normal color planes */
 943       /* Get an RGB visual */
 944       int min_rgb = min_red + min_green + min_blue;
 945       if (min_rgb>1 && min_rgb<8) {
 946          /* a special case to be sure we can get a monochrome visual */
 947          min_rgb = 1;
 948       }
 949       vis = choose_x_visual( dpy, screen, min_rgb, visual_type );
 950    }
 951    else {
 952       _mesa_warning(NULL, "overlay not supported");
 953       return NULL;
 954    }
 955
 956    if (vis) {
 957       /* Note: we're not exactly obeying the glXChooseVisual rules here.
 958        * When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
 959        * largest depth buffer size, which is 32bits/value.  Instead, we
 960        * return 16 to maintain performance with earlier versions of Mesa.
 961        */
 962       if (stencil_size > 0)
 963          depth_size = 24;  /* if Z and stencil, always use 24+8 format */
 964       else if (depth_size > 24)
 965          depth_size = 32;
 966       else if (depth_size > 16)
 967          depth_size = 24;
 968       else if (depth_size > 0) {
 969          depth_size = default_depth_bits();
 970       }
 971
 972       if (!alpha_flag) {
 973          alpha_flag = default_alpha_bits() > 0;
 974       }
 975
 976       /* we only support one size of stencil and accum buffers. */
 977       if (stencil_size > 0)
 978          stencil_size = STENCIL_BITS;
 979
 980       if (accumRedSize > 0 ||
 981           accumGreenSize > 0 ||
 982           accumBlueSize > 0 ||
 983           accumAlphaSize > 0) {
 984
 985          accumRedSize =
 986             accumGreenSize =
 987             accumBlueSize = default_accum_bits();
 988
 989          accumAlphaSize = alpha_flag ? accumRedSize : 0;
 990       }
 991
 992       xmvis = save_glx_visual( dpy, vis, rgb_flag, alpha_flag, double_flag,
 993                                stereo_flag, depth_size, stencil_size,
 994                                accumRedSize, accumGreenSize,
 995                                accumBlueSize, accumAlphaSize, level, numAux );
 996    }
 997
 998    return xmvis;
 999 }
1000
1001
1002 PUBLIC XVisualInfo *
1003 glXChooseVisual( Display *dpy, int screen, int *list )
1004 {
1005    XMesaVisual xmvis;
1006
1007    /* register ourselves as an extension on this display */
1008    register_with_display(dpy);
1009
1010    xmvis = choose_visual(dpy, screen, list, GL_FALSE);
1011    if (xmvis) {
1012       /* create a new vishandle - the cached one may be stale */
1013       xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1014       if (xmvis->vishandle) {
1015          memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1016       }
1017       return xmvis->vishandle;
1018    }
1019    else
1020       return NULL;
1021 }
1022
1023
1024 PUBLIC GLXContext
1025 glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1026                   GLXContext share_list, Bool direct )
1027 {
1028    XMesaVisual xmvis;
1029    GLXContext glxCtx;
1030    GLXContext shareCtx = share_list;
1031
1032    if (!dpy || !visinfo)
1033       return 0;
1034
1035    glxCtx = CALLOC_STRUCT(__GLXcontextRec);
1036    if (!glxCtx)
1037       return 0;
1038
1039    /* deallocate unused windows/buffers */
1040 #if 0
1041    XMesaGarbageCollect();
1042 #endif
1043
1044    xmvis = find_glx_visual( dpy, visinfo );
1045    if (!xmvis) {
1046       /* This visual wasn't found with glXChooseVisual() */
1047       xmvis = create_glx_visual( dpy, visinfo );
1048       if (!xmvis) {
1049          /* unusable visual */
1050          free(glxCtx);
1051          return NULL;
1052       }
1053    }
1054
1055    glxCtx->xmesaContext = XMesaCreateContext(xmvis,
1056                                    shareCtx ? shareCtx->xmesaContext : NULL);
1057    if (!glxCtx->xmesaContext) {
1058       free(glxCtx);
1059       return NULL;
1060    }
1061
1062    glxCtx->isDirect = DEFAULT_DIRECT;
1063    glxCtx->currentDpy = dpy;
1064    glxCtx->xid = (XID) glxCtx;  /* self pointer */
1065
1066    return glxCtx;
1067 }
1068
1069
1070 /* XXX these may have to be removed due to thread-safety issues. */
1071 static GLXContext MakeCurrent_PrevContext = 0;
1072 static GLXDrawable MakeCurrent_PrevDrawable = 0;
1073 static GLXDrawable MakeCurrent_PrevReadable = 0;
1074 static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1075 static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1076
1077
1078 /* GLX 1.3 and later */
1079 PUBLIC Bool
1080 glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1081                        GLXDrawable read, GLXContext ctx )
1082 {
1083    GLXContext glxCtx = ctx;
1084    static boolean firsttime = 1, no_rast = 0;
1085
1086    if (firsttime) {
1087       no_rast = getenv("SP_NO_RAST") != NULL;
1088       firsttime = 0;
1089    }
1090
1091    if (ctx && draw && read) {
1092       XMesaBuffer drawBuffer, readBuffer;
1093       XMesaContext xmctx = glxCtx->xmesaContext;
1094
1095       /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1096       if (ctx == MakeCurrent_PrevContext
1097           && draw == MakeCurrent_PrevDrawable) {
1098          drawBuffer = MakeCurrent_PrevDrawBuffer;
1099       }
1100       else {
1101          drawBuffer = XMesaFindBuffer( dpy, draw );
1102       }
1103       if (!drawBuffer) {
1104          /* drawable must be a new window! */
1105          drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1106          if (!drawBuffer) {
1107             /* Out of memory, or context/drawable depth mismatch */
1108             return False;
1109          }
1110       }
1111
1112       /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1113       if (ctx == MakeCurrent_PrevContext
1114           && read == MakeCurrent_PrevReadable) {
1115          readBuffer = MakeCurrent_PrevReadBuffer;
1116       }
1117       else {
1118          readBuffer = XMesaFindBuffer( dpy, read );
1119       }
1120       if (!readBuffer) {
1121          /* drawable must be a new window! */
1122          readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1123          if (!readBuffer) {
1124             /* Out of memory, or context/drawable depth mismatch */
1125             return False;
1126          }
1127       }
1128
1129       if (no_rast &&
1130           MakeCurrent_PrevContext == ctx &&
1131           MakeCurrent_PrevDrawable == draw &&
1132           MakeCurrent_PrevReadable == read &&
1133           MakeCurrent_PrevDrawBuffer == drawBuffer &&
1134           MakeCurrent_PrevReadBuffer == readBuffer)
1135          return True;
1136
1137       MakeCurrent_PrevContext = ctx;
1138       MakeCurrent_PrevDrawable = draw;
1139       MakeCurrent_PrevReadable = read;
1140       MakeCurrent_PrevDrawBuffer = drawBuffer;
1141       MakeCurrent_PrevReadBuffer = readBuffer;
1142
1143       /* Now make current! */
1144       if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1145          ctx->currentDpy = dpy;
1146          ctx->currentDrawable = draw;
1147          ctx->currentReadable = read;
1148          SetCurrentContext(ctx);
1149          return True;
1150       }
1151       else {
1152          return False;
1153       }
1154    }
1155    else if (!ctx && !draw && !read) {
1156       /* release current context w/out assigning new one. */
1157       XMesaMakeCurrent2( NULL, NULL, NULL );
1158       MakeCurrent_PrevContext = 0;
1159       MakeCurrent_PrevDrawable = 0;
1160       MakeCurrent_PrevReadable = 0;
1161       MakeCurrent_PrevDrawBuffer = 0;
1162       MakeCurrent_PrevReadBuffer = 0;
1163       SetCurrentContext(NULL);
1164       return True;
1165    }
1166    else {
1167       /* The args must either all be non-zero or all zero.
1168        * This is an error.
1169        */
1170       return False;
1171    }
1172 }
1173
1174
1175 PUBLIC Bool
1176 glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1177 {
1178    return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1179 }
1180
1181
1182 PUBLIC GLXContext
1183 glXGetCurrentContext(void)
1184 {
1185    return GetCurrentContext();
1186 }
1187
1188
1189 PUBLIC Display *
1190 glXGetCurrentDisplay(void)
1191 {
1192    GLXContext glxCtx = glXGetCurrentContext();
1193
1194    return glxCtx ? glxCtx->currentDpy : NULL;
1195 }
1196
1197
1198 PUBLIC Display *
1199 glXGetCurrentDisplayEXT(void)
1200 {
1201    return glXGetCurrentDisplay();
1202 }
1203
1204
1205 PUBLIC GLXDrawable
1206 glXGetCurrentDrawable(void)
1207 {
1208    GLXContext gc = glXGetCurrentContext();
1209    return gc ? gc->currentDrawable : 0;
1210 }
1211
1212
1213 PUBLIC GLXDrawable
1214 glXGetCurrentReadDrawable(void)
1215 {
1216    GLXContext gc = glXGetCurrentContext();
1217    return gc ? gc->currentReadable : 0;
1218 }
1219
1220
1221 PUBLIC GLXDrawable
1222 glXGetCurrentReadDrawableSGI(void)
1223 {
1224    return glXGetCurrentReadDrawable();
1225 }
1226
1227
1228 PUBLIC GLXPixmap
1229 glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1230 {
1231    XMesaVisual v;
1232    XMesaBuffer b;
1233
1234    v = find_glx_visual( dpy, visinfo );
1235    if (!v) {
1236       v = create_glx_visual( dpy, visinfo );
1237       if (!v) {
1238          /* unusable visual */
1239          return 0;
1240       }
1241    }
1242
1243    b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1244    if (!b) {
1245       return 0;
1246    }
1247    return b->drawable;
1248 }
1249
1250
1251 /*** GLX_MESA_pixmap_colormap ***/
1252
1253 PUBLIC GLXPixmap
1254 glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1255                         Pixmap pixmap, Colormap cmap )
1256 {
1257    XMesaVisual v;
1258    XMesaBuffer b;
1259
1260    v = find_glx_visual( dpy, visinfo );
1261    if (!v) {
1262       v = create_glx_visual( dpy, visinfo );
1263       if (!v) {
1264          /* unusable visual */
1265          return 0;
1266       }
1267    }
1268
1269    b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1270    if (!b) {
1271       return 0;
1272    }
1273    return b->drawable;
1274 }
1275
1276
1277 PUBLIC void
1278 glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1279 {
1280    XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1281    if (b) {
1282       XMesaDestroyBuffer(b);
1283    }
1284    else if (_mesa_getenv("MESA_DEBUG")) {
1285       _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1286    }
1287 }
1288
1289
1290 PUBLIC void
1291 glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1292                 unsigned long mask )
1293 {
1294    XMesaContext xm_src = src->xmesaContext;
1295    XMesaContext xm_dst = dst->xmesaContext;
1296    (void) dpy;
1297    if (MakeCurrent_PrevContext == src) {
1298       glFlush();
1299    }
1300    XMesaCopyContext(xm_src, xm_dst, mask);
1301 }
1302
1303
1304 PUBLIC Bool
1305 glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
1306 {
1307    int op, ev, err;
1308    /* Mesa's GLX isn't really an X extension but we try to act like one. */
1309    if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
1310       ev = err = 0;
1311    if (errorBase)
1312       *errorBase = err;
1313    if (eventBase)
1314       *eventBase = ev;
1315    return True; /* we're faking GLX so always return success */
1316 }
1317
1318
1319 PUBLIC void
1320 glXDestroyContext( Display *dpy, GLXContext ctx )
1321 {
1322    GLXContext glxCtx = ctx;
1323    (void) dpy;
1324    MakeCurrent_PrevContext = 0;
1325    MakeCurrent_PrevDrawable = 0;
1326    MakeCurrent_PrevReadable = 0;
1327    MakeCurrent_PrevDrawBuffer = 0;
1328    MakeCurrent_PrevReadBuffer = 0;
1329    XMesaDestroyContext( glxCtx->xmesaContext );
1330    XMesaGarbageCollect();
1331    free(glxCtx);
1332 }
1333
1334
1335 PUBLIC Bool
1336 glXIsDirect( Display *dpy, GLXContext ctx )
1337 {
1338    GLXContext glxCtx = ctx;
1339    (void) ctx;
1340    return glxCtx->isDirect;
1341 }
1342
1343
1344
1345 PUBLIC void
1346 glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1347 {
1348    XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1349    static boolean firsttime = 1, no_rast = 0;
1350
1351    if (firsttime) {
1352       no_rast = getenv("SP_NO_RAST") != NULL;
1353       firsttime = 0;
1354    }
1355
1356    if (no_rast)
1357       return;
1358
1359    if (buffer) {
1360       XMesaSwapBuffers(buffer);
1361    }
1362    else if (_mesa_getenv("MESA_DEBUG")) {
1363       _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1364                     (int) drawable);
1365    }
1366 }
1367
1368
1369
1370 /*** GLX_MESA_copy_sub_buffer ***/
1371
1372 PUBLIC void
1373 glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
1374                            int x, int y, int width, int height )
1375 {
1376    XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1377    if (buffer) {
1378       XMesaCopySubBuffer(buffer, x, y, width, height);
1379    }
1380    else if (_mesa_getenv("MESA_DEBUG")) {
1381       _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1382    }
1383 }
1384
1385
1386 PUBLIC Bool
1387 glXQueryVersion( Display *dpy, int *maj, int *min )
1388 {
1389    (void) dpy;
1390    /* Return GLX version, not Mesa version */
1391    assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1392    *maj = CLIENT_MAJOR_VERSION;
1393    *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1394    return True;
1395 }
1396
1397
1398 /*
1399  * Query the GLX attributes of the given XVisualInfo.
1400  */
1401 static int
1402 get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1403 {
1404    ASSERT(xmvis);
1405    switch(attrib) {
1406       case GLX_USE_GL:
1407          if (fbconfig)
1408             return GLX_BAD_ATTRIBUTE;
1409          *value = (int) True;
1410          return 0;
1411       case GLX_BUFFER_SIZE:
1412          *value = xmvis->visinfo->depth;
1413          return 0;
1414       case GLX_LEVEL:
1415          *value = xmvis->mesa_visual.level;
1416          return 0;
1417       case GLX_RGBA:
1418          if (fbconfig)
1419             return GLX_BAD_ATTRIBUTE;
1420          if (xmvis->mesa_visual.rgbMode) {
1421             *value = True;
1422          }
1423          else {
1424             *value = False;
1425          }
1426          return 0;
1427       case GLX_DOUBLEBUFFER:
1428          *value = (int) xmvis->mesa_visual.doubleBufferMode;
1429          return 0;
1430       case GLX_STEREO:
1431          *value = (int) xmvis->mesa_visual.stereoMode;
1432          return 0;
1433       case GLX_AUX_BUFFERS:
1434          *value = xmvis->mesa_visual.numAuxBuffers;
1435          return 0;
1436       case GLX_RED_SIZE:
1437          *value = xmvis->mesa_visual.redBits;
1438          return 0;
1439       case GLX_GREEN_SIZE:
1440          *value = xmvis->mesa_visual.greenBits;
1441          return 0;
1442       case GLX_BLUE_SIZE:
1443          *value = xmvis->mesa_visual.blueBits;
1444          return 0;
1445       case GLX_ALPHA_SIZE:
1446          *value = xmvis->mesa_visual.alphaBits;
1447          return 0;
1448       case GLX_DEPTH_SIZE:
1449          *value = xmvis->mesa_visual.depthBits;
1450          return 0;
1451       case GLX_STENCIL_SIZE:
1452          *value = xmvis->mesa_visual.stencilBits;
1453          return 0;
1454       case GLX_ACCUM_RED_SIZE:
1455          *value = xmvis->mesa_visual.accumRedBits;
1456          return 0;
1457       case GLX_ACCUM_GREEN_SIZE:
1458          *value = xmvis->mesa_visual.accumGreenBits;
1459          return 0;
1460       case GLX_ACCUM_BLUE_SIZE:
1461          *value = xmvis->mesa_visual.accumBlueBits;
1462          return 0;
1463       case GLX_ACCUM_ALPHA_SIZE:
1464          *value = xmvis->mesa_visual.accumAlphaBits;
1465          return 0;
1466
1467       /*
1468        * GLX_EXT_visual_info extension
1469        */
1470       case GLX_X_VISUAL_TYPE_EXT:
1471          switch (xmvis->visinfo->CLASS) {
1472             case StaticGray:   *value = GLX_STATIC_GRAY_EXT;   return 0;
1473             case GrayScale:    *value = GLX_GRAY_SCALE_EXT;    return 0;
1474             case StaticColor:  *value = GLX_STATIC_GRAY_EXT;   return 0;
1475             case PseudoColor:  *value = GLX_PSEUDO_COLOR_EXT;  return 0;
1476             case TrueColor:    *value = GLX_TRUE_COLOR_EXT;    return 0;
1477             case DirectColor:  *value = GLX_DIRECT_COLOR_EXT;  return 0;
1478          }
1479          return 0;
1480       case GLX_TRANSPARENT_TYPE_EXT:
1481          /* normal planes */
1482          *value = GLX_NONE_EXT;
1483          return 0;
1484       case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1485          /* undefined */
1486          return 0;
1487       case GLX_TRANSPARENT_RED_VALUE_EXT:
1488          /* undefined */
1489          return 0;
1490       case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1491          /* undefined */
1492          return 0;
1493       case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1494          /* undefined */
1495          return 0;
1496       case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1497          /* undefined */
1498          return 0;
1499
1500       /*
1501        * GLX_EXT_visual_info extension
1502        */
1503       case GLX_VISUAL_CAVEAT_EXT:
1504          /* test for zero, just in case */
1505          if (xmvis->mesa_visual.visualRating > 0)
1506             *value = xmvis->mesa_visual.visualRating;
1507          else
1508             *value = GLX_NONE_EXT;
1509          return 0;
1510
1511       /*
1512        * GLX_ARB_multisample
1513        */
1514       case GLX_SAMPLE_BUFFERS_ARB:
1515          *value = 0;
1516          return 0;
1517       case GLX_SAMPLES_ARB:
1518          *value = 0;
1519          return 0;
1520
1521       /*
1522        * For FBConfigs:
1523        */
1524       case GLX_SCREEN_EXT:
1525          if (!fbconfig)
1526             return GLX_BAD_ATTRIBUTE;
1527          *value = xmvis->visinfo->screen;
1528          break;
1529       case GLX_DRAWABLE_TYPE: /*SGIX too */
1530          if (!fbconfig)
1531             return GLX_BAD_ATTRIBUTE;
1532          *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1533          break;
1534       case GLX_RENDER_TYPE_SGIX:
1535          if (!fbconfig)
1536             return GLX_BAD_ATTRIBUTE;
1537          if (xmvis->mesa_visual.rgbMode)
1538             *value = GLX_RGBA_BIT;
1539          else
1540             *value = GLX_COLOR_INDEX_BIT;
1541          break;
1542       case GLX_X_RENDERABLE_SGIX:
1543          if (!fbconfig)
1544             return GLX_BAD_ATTRIBUTE;
1545          *value = True; /* XXX really? */
1546          break;
1547       case GLX_FBCONFIG_ID_SGIX:
1548          if (!fbconfig)
1549             return GLX_BAD_ATTRIBUTE;
1550          *value = xmvis->visinfo->visualid;
1551          break;
1552       case GLX_MAX_PBUFFER_WIDTH:
1553          if (!fbconfig)
1554             return GLX_BAD_ATTRIBUTE;
1555          /* XXX or MAX_WIDTH? */
1556          *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1557          break;
1558       case GLX_MAX_PBUFFER_HEIGHT:
1559          if (!fbconfig)
1560             return GLX_BAD_ATTRIBUTE;
1561          *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1562          break;
1563       case GLX_MAX_PBUFFER_PIXELS:
1564          if (!fbconfig)
1565             return GLX_BAD_ATTRIBUTE;
1566          *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1567                   DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1568          break;
1569       case GLX_VISUAL_ID:
1570          if (!fbconfig)
1571             return GLX_BAD_ATTRIBUTE;
1572          *value = xmvis->visinfo->visualid;
1573          break;
1574
1575 #ifdef GLX_EXT_texture_from_pixmap
1576       case GLX_BIND_TO_TEXTURE_RGB_EXT:
1577          *value = True; /*XXX*/
1578          break;
1579       case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1580          /* XXX review */
1581          *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1582          break;
1583       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1584          *value = True; /*XXX*/
1585          break;
1586       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1587          *value = (GLX_TEXTURE_1D_BIT_EXT |
1588                    GLX_TEXTURE_2D_BIT_EXT |
1589                    GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1590          break;
1591       case GLX_Y_INVERTED_EXT:
1592          *value = True; /*XXX*/
1593          break;
1594 #endif
1595
1596       default:
1597          return GLX_BAD_ATTRIBUTE;
1598    }
1599    return Success;
1600 }
1601
1602
1603 PUBLIC int
1604 glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1605                    int attrib, int *value )
1606 {
1607    XMesaVisual xmvis;
1608    int k;
1609    if (!dpy || !visinfo)
1610       return GLX_BAD_ATTRIBUTE;
1611
1612    xmvis = find_glx_visual( dpy, visinfo );
1613    if (!xmvis) {
1614       /* this visual wasn't obtained with glXChooseVisual */
1615       xmvis = create_glx_visual( dpy, visinfo );
1616       if (!xmvis) {
1617          /* this visual can't be used for GL rendering */
1618          if (attrib==GLX_USE_GL) {
1619             *value = (int) False;
1620             return 0;
1621          }
1622          else {
1623             return GLX_BAD_VISUAL;
1624          }
1625       }
1626    }
1627
1628    k = get_config(xmvis, attrib, value, GL_FALSE);
1629    return k;
1630 }
1631
1632
1633 PUBLIC void
1634 glXWaitGL( void )
1635 {
1636    XMesaContext xmesa = XMesaGetCurrentContext();
1637    XMesaFlush( xmesa );
1638 }
1639
1640
1641
1642 PUBLIC void
1643 glXWaitX( void )
1644 {
1645    XMesaContext xmesa = XMesaGetCurrentContext();
1646    XMesaFlush( xmesa );
1647 }
1648
1649
1650 static const char *
1651 get_extensions( void )
1652 {
1653    return EXTENSIONS;
1654 }
1655
1656
1657
1658 /* GLX 1.1 and later */
1659 PUBLIC const char *
1660 glXQueryExtensionsString( Display *dpy, int screen )
1661 {
1662    (void) dpy;
1663    (void) screen;
1664    return get_extensions();
1665 }
1666
1667
1668
1669 /* GLX 1.1 and later */
1670 PUBLIC const char *
1671 glXQueryServerString( Display *dpy, int screen, int name )
1672 {
1673    static char version[1000];
1674    sprintf(version, "%d.%d %s",
1675            SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, MESA_GLX_VERSION);
1676
1677    (void) dpy;
1678    (void) screen;
1679
1680    switch (name) {
1681       case GLX_EXTENSIONS:
1682          return get_extensions();
1683       case GLX_VENDOR:
1684          return VENDOR;
1685       case GLX_VERSION:
1686          return version;
1687       default:
1688          return NULL;
1689    }
1690 }
1691
1692
1693
1694 /* GLX 1.1 and later */
1695 PUBLIC const char *
1696 glXGetClientString( Display *dpy, int name )
1697 {
1698    static char version[1000];
1699    sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1700            CLIENT_MINOR_VERSION, MESA_GLX_VERSION);
1701
1702    (void) dpy;
1703
1704    switch (name) {
1705       case GLX_EXTENSIONS:
1706          return get_extensions();
1707       case GLX_VENDOR:
1708          return VENDOR;
1709       case GLX_VERSION:
1710          return version;
1711       default:
1712          return NULL;
1713    }
1714 }
1715
1716
1717
1718 /*
1719  * GLX 1.3 and later
1720  */
1721
1722
1723 PUBLIC int
1724 glXGetFBConfigAttrib( Display *dpy, GLXFBConfig config,
1725                            int attribute, int *value )
1726 {
1727    XMesaVisual v = (XMesaVisual) config;
1728    (void) dpy;
1729    (void) config;
1730
1731    if (!dpy || !config || !value)
1732       return -1;
1733
1734    return get_config(v, attribute, value, GL_TRUE);
1735 }
1736
1737
1738 PUBLIC GLXFBConfig *
1739 glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1740 {
1741    XVisualInfo *visuals, visTemplate;
1742    const long visMask = VisualScreenMask;
1743    int i;
1744
1745    /* Get list of all X visuals */
1746    visTemplate.screen = screen;
1747    visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1748    if (*nelements > 0) {
1749       XMesaVisual *results;
1750       results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
1751       if (!results) {
1752          *nelements = 0;
1753          return NULL;
1754       }
1755       for (i = 0; i < *nelements; i++) {
1756          results[i] = create_glx_visual(dpy, visuals + i);
1757          if (!results[i]) {
1758             *nelements = i;
1759             break;
1760          }
1761       }
1762       return (GLXFBConfig *) results;
1763    }
1764    return NULL;
1765 }
1766
1767
1768 PUBLIC GLXFBConfig *
1769 glXChooseFBConfig( Display *dpy, int screen,
1770                         const int *attribList, int *nitems )
1771 {
1772    XMesaVisual xmvis;
1773
1774    if (!attribList || !attribList[0]) {
1775       /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1776       return glXGetFBConfigs(dpy, screen, nitems);
1777    }
1778
1779    xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1780    if (xmvis) {
1781       GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
1782       if (!config) {
1783          *nitems = 0;
1784          return NULL;
1785       }
1786       *nitems = 1;
1787       config[0] = (GLXFBConfig) xmvis;
1788       return (GLXFBConfig *) config;
1789    }
1790    else {
1791       *nitems = 0;
1792       return NULL;
1793    }
1794 }
1795
1796
1797 PUBLIC XVisualInfo *
1798 glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1799 {
1800    if (dpy && config) {
1801       XMesaVisual xmvis = (XMesaVisual) config;
1802 #if 0
1803       return xmvis->vishandle;
1804 #else
1805       /* create a new vishandle - the cached one may be stale */
1806       xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1807       if (xmvis->vishandle) {
1808          memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1809       }
1810       return xmvis->vishandle;
1811 #endif
1812    }
1813    else {
1814       return NULL;
1815    }
1816 }
1817
1818
1819 PUBLIC GLXWindow
1820 glXCreateWindow( Display *dpy, GLXFBConfig config, Window win,
1821                       const int *attribList )
1822 {
1823    XMesaVisual xmvis = (XMesaVisual) config;
1824    XMesaBuffer xmbuf;
1825    if (!xmvis)
1826       return 0;
1827
1828    xmbuf = XMesaCreateWindowBuffer(xmvis, win);
1829    if (!xmbuf)
1830       return 0;
1831
1832    (void) dpy;
1833    (void) attribList;  /* Ignored in GLX 1.3 */
1834
1835    return win;  /* A hack for now */
1836 }
1837
1838
1839 PUBLIC void
1840 glXDestroyWindow( Display *dpy, GLXWindow window )
1841 {
1842    XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
1843    if (b)
1844       XMesaDestroyBuffer(b);
1845    /* don't destroy X window */
1846 }
1847
1848
1849 /* XXX untested */
1850 PUBLIC GLXPixmap
1851 glXCreatePixmap( Display *dpy, GLXFBConfig config, Pixmap pixmap,
1852                       const int *attribList )
1853 {
1854    XMesaVisual v = (XMesaVisual) config;
1855    XMesaBuffer b;
1856    const int *attr;
1857    int target = 0, format = 0, mipmap = 0;
1858    int value;
1859
1860    if (!dpy || !config || !pixmap)
1861       return 0;
1862
1863    for (attr = attribList; attr && *attr; attr++) {
1864       switch (*attr) {
1865       case GLX_TEXTURE_FORMAT_EXT:
1866          attr++;
1867          switch (*attr) {
1868          case GLX_TEXTURE_FORMAT_NONE_EXT:
1869          case GLX_TEXTURE_FORMAT_RGB_EXT:
1870          case GLX_TEXTURE_FORMAT_RGBA_EXT:
1871             format = *attr;
1872             break;
1873          default:
1874             /* error */
1875             return 0;
1876          }
1877          break;
1878       case GLX_TEXTURE_TARGET_EXT:
1879          attr++;
1880          switch (*attr) {
1881          case GLX_TEXTURE_1D_EXT:
1882          case GLX_TEXTURE_2D_EXT:
1883          case GLX_TEXTURE_RECTANGLE_EXT:
1884             target = *attr;
1885             break;
1886          default:
1887             /* error */
1888             return 0;
1889          }
1890          break;
1891       case GLX_MIPMAP_TEXTURE_EXT:
1892          attr++;
1893          if (*attr)
1894             mipmap = 1;
1895          break;
1896       default:
1897          /* error */
1898          return 0;
1899       }
1900    }
1901
1902    if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
1903       if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
1904                      &value, GL_TRUE) != Success
1905           || !value) {
1906          return 0; /* error! */
1907       }
1908    }
1909    else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1910       if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
1911                      &value, GL_TRUE) != Success
1912           || !value) {
1913          return 0; /* error! */
1914       }
1915    }
1916    if (mipmap) {
1917       if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
1918                      &value, GL_TRUE) != Success
1919           || !value) {
1920          return 0; /* error! */
1921       }
1922    }
1923    if (target == GLX_TEXTURE_1D_EXT) {
1924       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1925                      &value, GL_TRUE) != Success
1926           || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
1927          return 0; /* error! */
1928       }
1929    }
1930    else if (target == GLX_TEXTURE_2D_EXT) {
1931       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1932                      &value, GL_TRUE) != Success
1933           || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
1934          return 0; /* error! */
1935       }
1936    }
1937    if (target == GLX_TEXTURE_RECTANGLE_EXT) {
1938       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1939                      &value, GL_TRUE) != Success
1940           || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
1941          return 0; /* error! */
1942       }
1943    }
1944
1945    if (format || target || mipmap) {
1946       /* texture from pixmap */
1947       b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
1948    }
1949    else {
1950       b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1951    }
1952    if (!b) {
1953       return 0;
1954    }
1955
1956    return pixmap;
1957 }
1958
1959
1960 PUBLIC void
1961 glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1962 {
1963    XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
1964    if (b)
1965       XMesaDestroyBuffer(b);
1966    /* don't destroy X pixmap */
1967 }
1968
1969
1970 PUBLIC GLXPbuffer
1971 glXCreatePbuffer( Display *dpy, GLXFBConfig config,
1972                        const int *attribList )
1973 {
1974    XMesaVisual xmvis = (XMesaVisual) config;
1975    XMesaBuffer xmbuf;
1976    const int *attrib;
1977    int width = 0, height = 0;
1978    GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
1979
1980    (void) dpy;
1981
1982    for (attrib = attribList; *attrib; attrib++) {
1983       switch (*attrib) {
1984          case GLX_PBUFFER_WIDTH:
1985             attrib++;
1986             width = *attrib;
1987             break;
1988          case GLX_PBUFFER_HEIGHT:
1989             attrib++;
1990             height = *attrib;
1991             break;
1992          case GLX_PRESERVED_CONTENTS:
1993             attrib++;
1994             preserveContents = *attrib;
1995             break;
1996          case GLX_LARGEST_PBUFFER:
1997             attrib++;
1998             useLargest = *attrib;
1999             break;
2000          default:
2001             return 0;
2002       }
2003    }
2004
2005    if (width == 0 || height == 0)
2006       return 0;
2007
2008    if (width > MAX_WIDTH || height > MAX_HEIGHT) {
2009       /* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
2010        * allocate the largest possible buffer.
2011        */
2012       if (useLargest) {
2013          width = MAX_WIDTH;
2014          height = MAX_HEIGHT;
2015       }
2016    }
2017
2018    xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2019    /* A GLXPbuffer handle must be an X Drawable because that's what
2020     * glXMakeCurrent takes.
2021     */
2022    if (xmbuf) {
2023       xmbuf->largestPbuffer = useLargest;
2024       xmbuf->preservedContents = preserveContents;
2025       return (GLXPbuffer) xmbuf->drawable;
2026    }
2027    else {
2028       return 0;
2029    }
2030 }
2031
2032
2033 PUBLIC void
2034 glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2035 {
2036    XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2037    if (b) {
2038       XMesaDestroyBuffer(b);
2039    }
2040 }
2041
2042
2043 PUBLIC void
2044 glXQueryDrawable( Display *dpy, GLXDrawable draw, int attribute,
2045                        unsigned int *value )
2046 {
2047    GLuint width, height;
2048    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2049    if (!xmbuf)
2050       return;
2051
2052    /* make sure buffer's dimensions are up to date */
2053    xmesa_get_window_size(dpy, xmbuf, &width, &height);
2054
2055    switch (attribute) {
2056       case GLX_WIDTH:
2057          *value = width;
2058          break;
2059       case GLX_HEIGHT:
2060          *value = height;
2061          break;
2062       case GLX_PRESERVED_CONTENTS:
2063          *value = xmbuf->preservedContents;
2064          break;
2065       case GLX_LARGEST_PBUFFER:
2066          *value = xmbuf->largestPbuffer;
2067          break;
2068       case GLX_FBCONFIG_ID:
2069          *value = xmbuf->xm_visual->visinfo->visualid;
2070          return;
2071 #ifdef GLX_EXT_texture_from_pixmap
2072       case GLX_TEXTURE_FORMAT_EXT:
2073          *value = xmbuf->TextureFormat;
2074          break;
2075       case GLX_TEXTURE_TARGET_EXT:
2076          *value = xmbuf->TextureTarget;
2077          break;
2078       case GLX_MIPMAP_TEXTURE_EXT:
2079          *value = xmbuf->TextureMipmap;
2080          break;
2081 #endif
2082
2083       default:
2084          return; /* raise BadValue error */
2085    }
2086 }
2087
2088
2089 PUBLIC GLXContext
2090 glXCreateNewContext( Display *dpy, GLXFBConfig config,
2091                           int renderType, GLXContext shareList, Bool direct )
2092 {
2093    GLXContext glxCtx;
2094    GLXContext shareCtx = shareList;
2095    XMesaVisual xmvis = (XMesaVisual) config;
2096
2097    if (!dpy || !config ||
2098        (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2099       return 0;
2100
2101    glxCtx = CALLOC_STRUCT(__GLXcontextRec);
2102    if (!glxCtx)
2103       return 0;
2104
2105    /* deallocate unused windows/buffers */
2106    XMesaGarbageCollect();
2107
2108    glxCtx->xmesaContext = XMesaCreateContext(xmvis,
2109                                    shareCtx ? shareCtx->xmesaContext : NULL);
2110    if (!glxCtx->xmesaContext) {
2111       free(glxCtx);
2112       return NULL;
2113    }
2114
2115    glxCtx->isDirect = DEFAULT_DIRECT;
2116    glxCtx->currentDpy = dpy;
2117    glxCtx->xid = (XID) glxCtx;  /* self pointer */
2118
2119    return glxCtx;
2120 }
2121
2122
2123 PUBLIC int
2124 glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2125 {
2126    GLXContext glxCtx = ctx;
2127    XMesaContext xmctx = glxCtx->xmesaContext;
2128
2129    (void) dpy;
2130    (void) ctx;
2131
2132    switch (attribute) {
2133    case GLX_FBCONFIG_ID:
2134       *value = xmctx->xm_visual->visinfo->visualid;
2135       break;
2136    case GLX_RENDER_TYPE:
2137       if (xmctx->xm_visual->mesa_visual.rgbMode)
2138          *value = GLX_RGBA_TYPE;
2139       else
2140          *value = GLX_COLOR_INDEX_TYPE;
2141       break;
2142    case GLX_SCREEN:
2143       *value = 0;
2144       return Success;
2145    default:
2146       return GLX_BAD_ATTRIBUTE;
2147    }
2148    return 0;
2149 }
2150
2151
2152 PUBLIC void
2153 glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2154 {
2155    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2156    if (xmbuf)
2157       xmbuf->selectedEvents = mask;
2158 }
2159
2160
2161 PUBLIC void
2162 glXGetSelectedEvent( Display *dpy, GLXDrawable drawable,
2163                           unsigned long *mask )
2164 {
2165    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2166    if (xmbuf)
2167       *mask = xmbuf->selectedEvents;
2168    else
2169       *mask = 0;
2170 }
2171
2172
2173
2174 /*** GLX_SGI_swap_control ***/
2175
2176 PUBLIC int
2177 glXSwapIntervalSGI(int interval)
2178 {
2179    (void) interval;
2180    return 0;
2181 }
2182
2183
2184
2185 /*** GLX_SGI_video_sync ***/
2186
2187 static unsigned int FrameCounter = 0;
2188
2189 PUBLIC int
2190 glXGetVideoSyncSGI(unsigned int *count)
2191 {
2192    /* this is a bogus implementation */
2193    *count = FrameCounter++;
2194    return 0;
2195 }
2196
2197 PUBLIC int
2198 glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2199 {
2200    if (divisor <= 0 || remainder < 0)
2201       return GLX_BAD_VALUE;
2202    /* this is a bogus implementation */
2203    FrameCounter++;
2204    while (FrameCounter % divisor != remainder)
2205       FrameCounter++;
2206    *count = FrameCounter;
2207    return 0;
2208 }
2209
2210
2211
2212 /*** GLX_SGI_make_current_read ***/
2213
2214 PUBLIC Bool
2215 glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
2216 {
2217    return glXMakeContextCurrent( dpy, draw, read, ctx );
2218 }
2219
2220 /* not used
2221 static GLXDrawable
2222 glXGetCurrentReadDrawableSGI(void)
2223 {
2224    return 0;
2225 }
2226 */
2227
2228
2229 /*** GLX_SGIX_video_source ***/
2230 #if defined(_VL_H)
2231
2232 PUBLIC GLXVideoSourceSGIX
2233 glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode)
2234 {
2235    (void) dpy;
2236    (void) screen;
2237    (void) server;
2238    (void) path;
2239    (void) nodeClass;
2240    (void) drainNode;
2241    return 0;
2242 }
2243
2244 PUBLIC void
2245 glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2246 {
2247    (void) dpy;
2248    (void) src;
2249 }
2250
2251 #endif
2252
2253
2254 /*** GLX_EXT_import_context ***/
2255
2256 PUBLIC void
2257 glXFreeContextEXT(Display *dpy, GLXContext context)
2258 {
2259    (void) dpy;
2260    (void) context;
2261 }
2262
2263 PUBLIC GLXContextID
2264 glXGetContextIDEXT(const GLXContext context)
2265 {
2266    (void) context;
2267    return 0;
2268 }
2269
2270 PUBLIC GLXContext
2271 glXImportContextEXT(Display *dpy, GLXContextID contextID)
2272 {
2273    (void) dpy;
2274    (void) contextID;
2275    return 0;
2276 }
2277
2278 PUBLIC int
2279 glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute, int *value)
2280 {
2281    (void) dpy;
2282    (void) context;
2283    (void) attribute;
2284    (void) value;
2285    return 0;
2286 }
2287
2288
2289
2290 /*** GLX_SGIX_fbconfig ***/
2291
2292 PUBLIC int
2293 glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config, int attribute, int *value)
2294 {
2295    return glXGetFBConfigAttrib(dpy, config, attribute, value);
2296 }
2297
2298 PUBLIC GLXFBConfigSGIX *
2299 glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list, int *nelements)
2300 {
2301    return (GLXFBConfig *) glXChooseFBConfig(dpy, screen, attrib_list, nelements);
2302 }
2303
2304
2305 PUBLIC GLXPixmap
2306 glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap)
2307 {
2308    XMesaVisual xmvis = (XMesaVisual) config;
2309    XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2310    return xmbuf->drawable; /* need to return an X ID */
2311 }
2312
2313
2314 PUBLIC GLXContext
2315 glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct)
2316 {
2317    XMesaVisual xmvis = (XMesaVisual) config;
2318    GLXContext glxCtx;
2319    GLXContext shareCtx = share_list;
2320
2321    glxCtx = CALLOC_STRUCT(__GLXcontextRec);
2322    if (!glxCtx)
2323       return 0;
2324
2325    /* deallocate unused windows/buffers */
2326    XMesaGarbageCollect();
2327
2328    glxCtx->xmesaContext = XMesaCreateContext(xmvis,
2329                                    shareCtx ? shareCtx->xmesaContext : NULL);
2330    if (!glxCtx->xmesaContext) {
2331       free(glxCtx);
2332       return NULL;
2333    }
2334
2335    glxCtx->isDirect = DEFAULT_DIRECT;
2336    glxCtx->currentDpy = dpy;
2337    glxCtx->xid = (XID) glxCtx;  /* self pointer */
2338
2339    return glxCtx;
2340 }
2341
2342
2343 PUBLIC XVisualInfo *
2344 glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2345 {
2346    return glXGetVisualFromFBConfig(dpy, config);
2347 }
2348
2349
2350 PUBLIC GLXFBConfigSGIX
2351 glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2352 {
2353    XMesaVisual xmvis = find_glx_visual(dpy, vis);
2354    if (!xmvis) {
2355       /* This visual wasn't found with glXChooseVisual() */
2356       xmvis = create_glx_visual(dpy, vis);
2357    }
2358
2359    return (GLXFBConfigSGIX) xmvis;
2360 }
2361
2362
2363
2364 /*** GLX_SGIX_pbuffer ***/
2365
2366 PUBLIC GLXPbufferSGIX
2367 glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2368                              unsigned int width, unsigned int height,
2369                              int *attribList)
2370 {
2371    XMesaVisual xmvis = (XMesaVisual) config;
2372    XMesaBuffer xmbuf;
2373    const int *attrib;
2374    GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2375
2376    (void) dpy;
2377
2378    for (attrib = attribList; attrib && *attrib; attrib++) {
2379       switch (*attrib) {
2380          case GLX_PRESERVED_CONTENTS_SGIX:
2381             attrib++;
2382             preserveContents = *attrib; /* ignored */
2383             break;
2384          case GLX_LARGEST_PBUFFER_SGIX:
2385             attrib++;
2386             useLargest = *attrib; /* ignored */
2387             break;
2388          default:
2389             return 0;
2390       }
2391    }
2392
2393    /* not used at this time */
2394    (void) useLargest;
2395    (void) preserveContents;
2396
2397    xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2398    /* A GLXPbuffer handle must be an X Drawable because that's what
2399     * glXMakeCurrent takes.
2400     */
2401    return (GLXPbuffer) xmbuf->drawable;
2402 }
2403
2404
2405 PUBLIC void
2406 glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2407 {
2408    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2409    if (xmbuf) {
2410       XMesaDestroyBuffer(xmbuf);
2411    }
2412 }
2413
2414
2415 PUBLIC int
2416 glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value)
2417 {
2418    const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2419
2420    if (!xmbuf) {
2421       /* Generate GLXBadPbufferSGIX for bad pbuffer */
2422       return 0;
2423    }
2424
2425    switch (attribute) {
2426       case GLX_PRESERVED_CONTENTS_SGIX:
2427          *value = True;
2428          break;
2429       case GLX_LARGEST_PBUFFER_SGIX:
2430          *value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
2431          break;
2432       case GLX_WIDTH_SGIX:
2433          *value = xmesa_buffer_width(xmbuf);
2434          break;
2435       case GLX_HEIGHT_SGIX:
2436          *value = xmesa_buffer_height(xmbuf);
2437          break;
2438       case GLX_EVENT_MASK_SGIX:
2439          *value = 0;  /* XXX might be wrong */
2440          break;
2441       default:
2442          *value = 0;
2443    }
2444    return 0;
2445 }
2446
2447
2448 PUBLIC void
2449 glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2450 {
2451    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2452    if (xmbuf) {
2453       /* Note: we'll never generate clobber events */
2454       xmbuf->selectedEvents = mask;
2455    }
2456 }
2457
2458
2459 PUBLIC void
2460 glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2461 {
2462    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2463    if (xmbuf) {
2464       *mask = xmbuf->selectedEvents;
2465    }
2466    else {
2467       *mask = 0;
2468    }
2469 }
2470
2471
2472
2473 /*** GLX_SGI_cushion ***/
2474
2475 PUBLIC void
2476 glXCushionSGI(Display *dpy, Window win, float cushion)
2477 {
2478    (void) dpy;
2479    (void) win;
2480    (void) cushion;
2481 }
2482
2483
2484
2485 /*** GLX_SGIX_video_resize ***/
2486
2487 PUBLIC int
2488 glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel , Window window)
2489 {
2490    (void) dpy;
2491    (void) screen;
2492    (void) channel;
2493    (void) window;
2494    return 0;
2495 }
2496
2497 PUBLIC int
2498 glXChannelRectSGIX(Display *dpy, int screen, int channel, int x, int y, int w, int h)
2499 {
2500    (void) dpy;
2501    (void) screen;
2502    (void) channel;
2503    (void) x;
2504    (void) y;
2505    (void) w;
2506    (void) h;
2507    return 0;
2508 }
2509
2510 PUBLIC int
2511 glXQueryChannelRectSGIX(Display *dpy, int screen, int channel, int *x, int *y, int *w, int *h)
2512 {
2513    (void) dpy;
2514    (void) screen;
2515    (void) channel;
2516    (void) x;
2517    (void) y;
2518    (void) w;
2519    (void) h;
2520    return 0;
2521 }
2522
2523 PUBLIC int
2524 glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel, int *dx, int *dy, int *dw, int *dh)
2525 {
2526    (void) dpy;
2527    (void) screen;
2528    (void) channel;
2529    (void) dx;
2530    (void) dy;
2531    (void) dw;
2532    (void) dh;
2533    return 0;
2534 }
2535
2536 PUBLIC int
2537 glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2538 {
2539    (void) dpy;
2540    (void) screen;
2541    (void) channel;
2542    (void) synctype;
2543    return 0;
2544 }
2545
2546
2547
2548 /*** GLX_SGIX_dmbuffer **/
2549
2550 #if defined(_DM_BUFFER_H_)
2551 PUBLIC Bool
2552 glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer)
2553 {
2554    (void) dpy;
2555    (void) pbuffer;
2556    (void) params;
2557    (void) dmbuffer;
2558    return False;
2559 }
2560 #endif
2561
2562
2563 /*** GLX_SGIX_swap_group ***/
2564
2565 PUBLIC void
2566 glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2567 {
2568    (void) dpy;
2569    (void) drawable;
2570    (void) member;
2571 }
2572
2573
2574
2575 /*** GLX_SGIX_swap_barrier ***/
2576
2577 PUBLIC void
2578 glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2579 {
2580    (void) dpy;
2581    (void) drawable;
2582    (void) barrier;
2583 }
2584
2585 PUBLIC Bool
2586 glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2587 {
2588    (void) dpy;
2589    (void) screen;
2590    (void) max;
2591    return False;
2592 }
2593
2594
2595
2596 /*** GLX_SUN_get_transparent_index ***/
2597
2598 PUBLIC Status
2599 glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay, long *pTransparent)
2600 {
2601    (void) dpy;
2602    (void) overlay;
2603    (void) underlay;
2604    (void) pTransparent;
2605    return 0;
2606 }
2607
2608
2609
2610 /*** GLX_MESA_release_buffers ***/
2611
2612 /*
2613  * Release the depth, stencil, accum buffers attached to a GLXDrawable
2614  * (a window or pixmap) prior to destroying the GLXDrawable.
2615  */
2616 PUBLIC Bool
2617 glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2618 {
2619    XMesaBuffer b = XMesaFindBuffer(dpy, d);
2620    if (b) {
2621       XMesaDestroyBuffer(b);
2622       return True;
2623    }
2624    return False;
2625 }
2626
2627 /*** GLX_EXT_texture_from_pixmap ***/
2628
2629 PUBLIC void
2630 glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
2631                         const int *attrib_list)
2632 {
2633    XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2634    if (b)
2635       XMesaBindTexImage(dpy, b, buffer, attrib_list);
2636 }
2637
2638 PUBLIC void
2639 glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
2640 {
2641    XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2642    if (b)
2643       XMesaReleaseTexImage(dpy, b, buffer);
2644 }