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 /* Who implemented this GLX? */
  50 #define VENDOR "Brian Paul"
  51
  52 #define EXTENSIONS \
  53    "GLX_MESA_copy_sub_buffer " \
  54    "GLX_MESA_pixmap_colormap " \
  55    "GLX_MESA_release_buffers " \
  56    "GLX_ARB_get_proc_address " \
  57    "GLX_EXT_texture_from_pixmap " \
  58    "GLX_EXT_visual_info " \
  59    "GLX_EXT_visual_rating " \
  60    /*"GLX_SGI_video_sync "*/ \
  61    "GLX_SGIX_fbconfig " \
  62    "GLX_SGIX_pbuffer "
  63
  64 #define DEFAULT_DIRECT GL_TRUE
  65
  66
  67
  68 /**
  69  * The GLXContext typedef is defined as a pointer to this structure.
  70  */
  71 struct __GLXcontextRec
  72 {
  73    Display *currentDpy;
  74    GLboolean isDirect;
  75    GLXDrawable currentDrawable;
  76    GLXDrawable currentReadable;
  77    XID xid;
  78
  79    XMesaContext xmesaContext;
  80 };
  81
  82
  83
  84 static pipe_tsd ContextTSD;
  85
  86 /** Set current context for calling thread */
  87 static void
  88 SetCurrentContext(GLXContext c)
  89 {
  90    pipe_tsd_set(&ContextTSD, c);
  91 }
  92
  93 /** Get current context for calling thread */
  94 static GLXContext
  95 GetCurrentContext(void)
  96 {
  97    return pipe_tsd_get(&ContextTSD);
  98 }
  99
 100
 101
 102 /**********************************************************************/
 103 /***                       GLX Visual Code                          ***/
 104 /**********************************************************************/
 105
 106 #define DONT_CARE -1
 107
 108
 109 static XMesaVisual *VisualTable = NULL;
 110 static int NumVisuals = 0;
 111
 112
 113
 114 /* Macro to handle c_class vs class field name in XVisualInfo struct */
 115 #if defined(__cplusplus) || defined(c_plusplus)
 116 #define CLASS c_class
 117 #else
 118 #define CLASS class
 119 #endif
 120
 121
 122
 123 /*
 124  * Test if the given XVisualInfo is usable for Mesa rendering.
 125  */
 126 static GLboolean
 127 is_usable_visual( XVisualInfo *vinfo )
 128 {
 129    switch (vinfo->CLASS) {
 130       case StaticGray:
 131       case GrayScale:
 132          /* Any StaticGray/GrayScale visual works in RGB or CI mode */
 133          return GL_TRUE;
 134       case StaticColor:
 135       case PseudoColor:
 136          /* Any StaticColor/PseudoColor visual of at least 4 bits */
 137          if (vinfo->depth>=4) {
 138             return GL_TRUE;
 139          }
 140          else {
 141             return GL_FALSE;
 142          }
 143       case TrueColor:
 144       case DirectColor:
 145          /* Any depth of TrueColor or DirectColor works in RGB mode */
 146          return GL_TRUE;
 147       default:
 148          /* This should never happen */
 149          return GL_FALSE;
 150    }
 151 }
 152
 153
 154 /*
 155  * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
 156  * configuration in our list of GLX visuals.
 157  */
 158 static XMesaVisual
 159 save_glx_visual( Display *dpy, XVisualInfo *vinfo,
 160                  GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
 161                  GLboolean stereoFlag,
 162                  GLint depth_size, GLint stencil_size,
 163                  GLint accumRedSize, GLint accumGreenSize,
 164                  GLint accumBlueSize, GLint accumAlphaSize,
 165                  GLint level, GLint numAuxBuffers )
 166 {
 167    GLboolean ximageFlag = GL_TRUE;
 168    XMesaVisual xmvis;
 169    GLint i;
 170    GLboolean comparePointers;
 171
 172    if (dbFlag) {
 173       /* Check if the MESA_BACK_BUFFER env var is set */
 174       char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
 175       if (backbuffer) {
 176          if (backbuffer[0]=='p' || backbuffer[0]=='P') {
 177             ximageFlag = GL_FALSE;
 178          }
 179          else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
 180             ximageFlag = GL_TRUE;
 181          }
 182          else {
 183             _mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
 184          }
 185       }
 186    }
 187
 188    if (stereoFlag) {
 189       /* stereo not supported */
 190       return NULL;
 191    }
 192
 193    if (stencil_size > 0 && depth_size > 0)
 194       depth_size = 24;
 195
 196    /* Comparing IDs uses less memory but sometimes fails. */
 197    /* XXX revisit this after 3.0 is finished. */
 198    if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
 199       comparePointers = GL_TRUE;
 200    else
 201       comparePointers = GL_FALSE;
 202
 203    /* Force the visual to have an alpha channel */
 204    if (rgbFlag && _mesa_getenv("MESA_GLX_FORCE_ALPHA"))
 205       alphaFlag = GL_TRUE;
 206
 207    /* First check if a matching visual is already in the list */
 208    for (i=0; i<NumVisuals; i++) {
 209       XMesaVisual v = VisualTable[i];
 210       if (v->display == dpy
 211           && v->mesa_visual.level == level
 212           && v->mesa_visual.numAuxBuffers == numAuxBuffers
 213           && v->ximage_flag == ximageFlag
 214           && v->mesa_visual.rgbMode == rgbFlag
 215           && v->mesa_visual.doubleBufferMode == dbFlag
 216           && v->mesa_visual.stereoMode == stereoFlag
 217           && (v->mesa_visual.alphaBits > 0) == alphaFlag
 218           && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
 219           && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
 220           && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
 221           && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
 222           && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
 223           && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
 224          /* now either compare XVisualInfo pointers or visual IDs */
 225          if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
 226              || (comparePointers && v->vishandle == vinfo)) {
 227             return v;
 228          }
 229       }
 230    }
 231
 232    /* Create a new visual and add it to the list. */
 233
 234    xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
 235                               stereoFlag, ximageFlag,
 236                               depth_size, stencil_size,
 237                               accumRedSize, accumBlueSize,
 238                               accumBlueSize, accumAlphaSize, 0, level,
 239                               GLX_NONE_EXT );
 240    if (xmvis) {
 241       /* Save a copy of the pointer now so we can find this visual again
 242        * if we need to search for it in find_glx_visual().
 243        */
 244       xmvis->vishandle = vinfo;
 245       /* Allocate more space for additional visual */
 246       VisualTable = (XMesaVisual *) _mesa_realloc( VisualTable,
 247                                    sizeof(XMesaVisual) * NumVisuals,
 248                                    sizeof(XMesaVisual) * (NumVisuals + 1));
 249       /* add xmvis to the list */
 250       VisualTable[NumVisuals] = xmvis;
 251       NumVisuals++;
 252       /* XXX minor hack, because XMesaCreateVisual doesn't support an
 253        * aux buffers parameter.
 254        */
 255       xmvis->mesa_visual.numAuxBuffers = numAuxBuffers;
 256    }
 257    return xmvis;
 258 }
 259
 260
 261 /**
 262  * Return the default number of bits for the Z buffer.
 263  * If defined, use the MESA_GLX_DEPTH_BITS env var value.
 264  * Otherwise, use the DEFAULT_SOFTWARE_DEPTH_BITS constant.
 265  * XXX probably do the same thing for stencil, accum, etc.
 266  */
 267 static GLint
 268 default_depth_bits(void)
 269 {
 270    int zBits;
 271    const char *zEnv = _mesa_getenv("MESA_GLX_DEPTH_BITS");
 272    if (zEnv)
 273       zBits = atoi(zEnv);
 274    else
 275       zBits = DEFAULT_SOFTWARE_DEPTH_BITS;
 276    return zBits;
 277 }
 278
 279 static GLint
 280 default_alpha_bits(void)
 281 {
 282    int aBits;
 283    const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS");
 284    if (aEnv)
 285       aBits = atoi(aEnv);
 286    else
 287       aBits = 0;
 288    return aBits;
 289 }
 290
 291 static GLint
 292 default_accum_bits(void)
 293 {
 294    return 16;
 295 }
 296
 297
 298
 299 /*
 300  * Create a GLX visual from a regular XVisualInfo.
 301  * This is called when Fake GLX is given an XVisualInfo which wasn't
 302  * returned by glXChooseVisual.  Since this is the first time we're
 303  * considering this visual we'll take a guess at reasonable values
 304  * for depth buffer size, stencil size, accum size, etc.
 305  * This is the best we can do with a client-side emulation of GLX.
 306  */
 307 static XMesaVisual
 308 create_glx_visual( Display *dpy, XVisualInfo *visinfo )
 309 {
 310    GLint zBits = default_depth_bits();
 311    GLint accBits = default_accum_bits();
 312    GLboolean alphaFlag = default_alpha_bits() > 0;
 313
 314    if (is_usable_visual( visinfo )) {
 315       /* Configure this visual as RGB, double-buffered, depth-buffered. */
 316       /* This is surely wrong for some people's needs but what else */
 317       /* can be done?  They should use glXChooseVisual(). */
 318       return save_glx_visual( dpy, visinfo,
 319                               GL_TRUE,   /* rgb */
 320                               alphaFlag, /* alpha */
 321                               GL_TRUE,   /* double */
 322                               GL_FALSE,  /* stereo */
 323                               zBits,
 324                               STENCIL_BITS,
 325                               accBits, /* r */
 326                               accBits, /* g */
 327                               accBits, /* b */
 328                               accBits, /* a */
 329                               0,         /* level */
 330                               0          /* numAux */
 331          );
 332    }
 333    else {
 334       _mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
 335       return NULL;
 336    }
 337 }
 338
 339
 340
 341 /*
 342  * Find the GLX visual associated with an XVisualInfo.
 343  */
 344 static XMesaVisual
 345 find_glx_visual( Display *dpy, XVisualInfo *vinfo )
 346 {
 347    int i;
 348
 349    /* try to match visual id */
 350    for (i=0;i<NumVisuals;i++) {
 351       if (VisualTable[i]->display==dpy
 352           && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
 353          return VisualTable[i];
 354       }
 355    }
 356
 357    /* if that fails, try to match pointers */
 358    for (i=0;i<NumVisuals;i++) {
 359       if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
 360          return VisualTable[i];
 361       }
 362    }
 363
 364    return NULL;
 365 }
 366
 367
 368 /**
 369  * Try to get an X visual which matches the given arguments.
 370  */
 371 static XVisualInfo *
 372 get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
 373 {
 374    XVisualInfo temp, *vis;
 375    long mask;
 376    int n;
 377    unsigned int default_depth;
 378    int default_class;
 379
 380    mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
 381    temp.screen = scr;
 382    temp.depth = depth;
 383    temp.CLASS = xclass;
 384
 385    default_depth = DefaultDepth(dpy,scr);
 386    default_class = DefaultVisual(dpy,scr)->CLASS;
 387
 388    if (depth==default_depth && xclass==default_class) {
 389       /* try to get root window's visual */
 390       temp.visualid = DefaultVisual(dpy,scr)->visualid;
 391       mask |= VisualIDMask;
 392    }
 393
 394    vis = XGetVisualInfo( dpy, mask, &temp, &n );
 395
 396    /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
 397     * An SGI Infinite Reality system, for example, can have 30bpp pixels:
 398     * 10 bits per color channel.  Mesa's limited to a max of 8 bits/channel.
 399     */
 400    if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
 401       if (_mesa_bitcount((GLuint) vis->red_mask  ) <= 8 &&
 402           _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
 403           _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
 404          return vis;
 405       }
 406       else {
 407          XFree((void *) vis);
 408          return NULL;
 409       }
 410    }
 411
 412    return vis;
 413 }
 414
 415
 416 /*
 417  * Retrieve the value of the given environment variable and find
 418  * the X visual which matches it.
 419  * Input:  dpy - the display
 420  *         screen - the screen number
 421  *         varname - the name of the environment variable
 422  * Return:  an XVisualInfo pointer to NULL if error.
 423  */
 424 static XVisualInfo *
 425 get_env_visual(Display *dpy, int scr, const char *varname)
 426 {
 427    char value[100], type[100];
 428    int depth, xclass = -1;
 429    XVisualInfo *vis;
 430
 431    if (!_mesa_getenv( varname )) {
 432       return NULL;
 433    }
 434
 435    strncpy( value, _mesa_getenv(varname), 100 );
 436    value[99] = 0;
 437
 438    sscanf( value, "%s %d", type, &depth );
 439
 440    if (strcmp(type,"TrueColor")==0)          xclass = TrueColor;
 441    else if (strcmp(type,"DirectColor")==0)   xclass = DirectColor;
 442    else if (strcmp(type,"PseudoColor")==0)   xclass = PseudoColor;
 443    else if (strcmp(type,"StaticColor")==0)   xclass = StaticColor;
 444    else if (strcmp(type,"GrayScale")==0)     xclass = GrayScale;
 445    else if (strcmp(type,"StaticGray")==0)    xclass = StaticGray;
 446
 447    if (xclass>-1 && depth>0) {
 448       vis = get_visual( dpy, scr, depth, xclass );
 449       if (vis) {
 450          return vis;
 451       }
 452    }
 453
 454    _mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
 455                  type, depth);
 456
 457    return NULL;
 458 }
 459
 460
 461
 462 /*
 463  * Select an X visual which satisfies the RGBA flag and minimum depth.
 464  * Input:  dpy,
 465  *         screen - X display and screen number
 466  *         min_depth - minimum visual depth
 467  *         preferred_class - preferred GLX visual class or DONT_CARE
 468  * Return:  pointer to an XVisualInfo or NULL.
 469  */
 470 static XVisualInfo *
 471 choose_x_visual( Display *dpy, int screen, int min_depth,
 472                  int preferred_class )
 473 {
 474    XVisualInfo *vis;
 475    int xclass, visclass = 0;
 476    int depth;
 477
 478    /* First see if the MESA_RGB_VISUAL env var is defined */
 479    vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
 480    if (vis) {
 481       return vis;
 482    }
 483    /* Otherwise, search for a suitable visual */
 484    if (preferred_class==DONT_CARE) {
 485       for (xclass=0;xclass<6;xclass++) {
 486          switch (xclass) {
 487          case 0:  visclass = TrueColor;    break;
 488          case 1:  visclass = DirectColor;  break;
 489          case 2:  visclass = PseudoColor;  break;
 490          case 3:  visclass = StaticColor;  break;
 491          case 4:  visclass = GrayScale;    break;
 492          case 5:  visclass = StaticGray;   break;
 493          }
 494          if (min_depth==0) {
 495             /* start with shallowest */
 496             for (depth=0;depth<=32;depth++) {
 497                if (visclass==TrueColor && depth==8) {
 498                   /* Special case:  try to get 8-bit PseudoColor before */
 499                   /* 8-bit TrueColor */
 500                   vis = get_visual( dpy, screen, 8, PseudoColor );
 501                   if (vis) {
 502                      return vis;
 503                   }
 504                }
 505                vis = get_visual( dpy, screen, depth, visclass );
 506                if (vis) {
 507                   return vis;
 508                }
 509             }
 510          }
 511          else {
 512             /* start with deepest */
 513             for (depth=32;depth>=min_depth;depth--) {
 514                if (visclass==TrueColor && depth==8) {
 515                   /* Special case:  try to get 8-bit PseudoColor before */
 516                   /* 8-bit TrueColor */
 517                   vis = get_visual( dpy, screen, 8, PseudoColor );
 518                   if (vis) {
 519                      return vis;
 520                   }
 521                }
 522                vis = get_visual( dpy, screen, depth, visclass );
 523                if (vis) {
 524                   return vis;
 525                }
 526             }
 527          }
 528       }
 529    }
 530    else {
 531       /* search for a specific visual class */
 532       switch (preferred_class) {
 533       case GLX_TRUE_COLOR_EXT:    visclass = TrueColor;    break;
 534       case GLX_DIRECT_COLOR_EXT:  visclass = DirectColor;  break;
 535       case GLX_PSEUDO_COLOR_EXT:  visclass = PseudoColor;  break;
 536       case GLX_STATIC_COLOR_EXT:  visclass = StaticColor;  break;
 537       case GLX_GRAY_SCALE_EXT:    visclass = GrayScale;    break;
 538       case GLX_STATIC_GRAY_EXT:   visclass = StaticGray;   break;
 539       default:   return NULL;
 540       }
 541       if (min_depth==0) {
 542          /* start with shallowest */
 543          for (depth=0;depth<=32;depth++) {
 544             vis = get_visual( dpy, screen, depth, visclass );
 545             if (vis) {
 546                return vis;
 547             }
 548          }
 549       }
 550       else {
 551          /* start with deepest */
 552          for (depth=32;depth>=min_depth;depth--) {
 553             vis = get_visual( dpy, screen, depth, visclass );
 554             if (vis) {
 555                return vis;
 556             }
 557          }
 558       }
 559    }
 560
 561    /* didn't find a visual */
 562    return NULL;
 563 }
 564
 565
 566
 567
 568 /**********************************************************************/
 569 /***             Display-related functions                          ***/
 570 /**********************************************************************/
 571
 572
 573 /**
 574  * Free all XMesaVisuals which are associated with the given display.
 575  */
 576 static void
 577 destroy_visuals_on_display(Display *dpy)
 578 {
 579    int i;
 580    for (i = 0; i < NumVisuals; i++) {
 581       if (VisualTable[i]->display == dpy) {
 582          /* remove this visual */
 583          int j;
 584          free(VisualTable[i]);
 585          for (j = i; j < NumVisuals - 1; j++)
 586             VisualTable[j] = VisualTable[j + 1];
 587          NumVisuals--;
 588       }
 589    }
 590 }
 591
 592
 593 /**
 594  * Called from XCloseDisplay() to let us free our display-related data.
 595  */
 596 static int
 597 close_display_callback(Display *dpy, XExtCodes *codes)
 598 {
 599    xmesa_destroy_buffers_on_display(dpy);
 600    destroy_visuals_on_display(dpy);
 601    return 0;
 602 }
 603
 604
 605 /**
 606  * Look for the named extension on given display and return a pointer
 607  * to the _XExtension data, or NULL if extension not found.
 608  */
 609 static _XExtension *
 610 lookup_extension(Display *dpy, const char *extName)
 611 {
 612    _XExtension *ext;
 613    for (ext = dpy->ext_procs; ext; ext = ext->next) {
 614       if (ext->name && strcmp(ext->name, extName) == 0) {
 615          return ext;
 616       }
 617    }
 618    return NULL;
 619 }
 620
 621
 622 /**
 623  * Whenever we're given a new Display pointer, call this function to
 624  * register our close_display_callback function.
 625  */
 626 static void
 627 register_with_display(Display *dpy)
 628 {
 629    const char *extName = "MesaGLX";
 630    _XExtension *ext;
 631
 632    ext = lookup_extension(dpy, extName);
 633    if (!ext) {
 634       XExtCodes *c = XAddExtension(dpy);
 635       ext = dpy->ext_procs;  /* new extension is at head of list */
 636       assert(c->extension == ext->codes.extension);
 637       (void) c;
 638       ext->name = _mesa_strdup(extName);
 639       ext->close_display = close_display_callback;
 640    }
 641 }
 642
 643
 644 /**********************************************************************/
 645 /***                  Begin Fake GLX API Functions                  ***/
 646 /**********************************************************************/
 647
 648
 649 /**
 650  * Helper used by glXChooseVisual and glXChooseFBConfig.
 651  * The fbConfig parameter must be GL_FALSE for the former and GL_TRUE for
 652  * the later.
 653  * In either case, the attribute list is terminated with the value 'None'.
 654  */
 655 static XMesaVisual
 656 choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig )
 657 {
 658    const GLboolean rgbModeDefault = fbConfig;
 659    const int *parselist;
 660    XVisualInfo *vis;
 661    int min_ci = 0;
 662    int min_red=0, min_green=0, min_blue=0;
 663    GLboolean rgb_flag = rgbModeDefault;
 664    GLboolean alpha_flag = GL_FALSE;
 665    GLboolean double_flag = GL_FALSE;
 666    GLboolean stereo_flag = GL_FALSE;
 667    GLint depth_size = 0;
 668    GLint stencil_size = 0;
 669    GLint accumRedSize = 0;
 670    GLint accumGreenSize = 0;
 671    GLint accumBlueSize = 0;
 672    GLint accumAlphaSize = 0;
 673    int level = 0;
 674    int visual_type = DONT_CARE;
 675    int trans_type = DONT_CARE;
 676    int trans_value = DONT_CARE;
 677    GLint caveat = DONT_CARE;
 678    XMesaVisual xmvis = NULL;
 679    int desiredVisualID = -1;
 680    int numAux = 0;
 681
 682    xmesa_init( dpy );
 683
 684    parselist = list;
 685
 686    while (*parselist) {
 687
 688       switch (*parselist) {
 689          case GLX_USE_GL:
 690             if (fbConfig) {
 691                /* invalid token */
 692                return NULL;
 693             }
 694             else {
 695                /* skip */
 696                parselist++;
 697             }
 698             break;
 699          case GLX_BUFFER_SIZE:
 700             parselist++;
 701             min_ci = *parselist++;
 702             break;
 703          case GLX_LEVEL:
 704             parselist++;
 705             level = *parselist++;
 706             break;
 707          case GLX_RGBA:
 708             if (fbConfig) {
 709                /* invalid token */
 710                return NULL;
 711             }
 712             else {
 713                rgb_flag = GL_TRUE;
 714                parselist++;
 715             }
 716             break;
 717          case GLX_DOUBLEBUFFER:
 718             parselist++;
 719             if (fbConfig) {
 720                double_flag = *parselist++;
 721             }
 722             else {
 723                double_flag = GL_TRUE;
 724             }
 725             break;
 726          case GLX_STEREO:
 727             parselist++;
 728             if (fbConfig) {
 729                stereo_flag = *parselist++;
 730             }
 731             else {
 732                stereo_flag = GL_TRUE;
 733             }
 734             break;
 735          case GLX_AUX_BUFFERS:
 736             parselist++;
 737             numAux = *parselist++;
 738             if (numAux > MAX_AUX_BUFFERS)
 739                return NULL;
 740             break;
 741          case GLX_RED_SIZE:
 742             parselist++;
 743             min_red = *parselist++;
 744             break;
 745          case GLX_GREEN_SIZE:
 746             parselist++;
 747             min_green = *parselist++;
 748             break;
 749          case GLX_BLUE_SIZE:
 750             parselist++;
 751             min_blue = *parselist++;
 752             break;
 753          case GLX_ALPHA_SIZE:
 754             parselist++;
 755             {
 756                GLint size = *parselist++;
 757                alpha_flag = size ? GL_TRUE : GL_FALSE;
 758             }
 759             break;
 760          case GLX_DEPTH_SIZE:
 761             parselist++;
 762             depth_size = *parselist++;
 763             break;
 764          case GLX_STENCIL_SIZE:
 765             parselist++;
 766             stencil_size = *parselist++;
 767             break;
 768          case GLX_ACCUM_RED_SIZE:
 769             parselist++;
 770             {
 771                GLint size = *parselist++;
 772                accumRedSize = MAX2( accumRedSize, size );
 773             }
 774             break;
 775          case GLX_ACCUM_GREEN_SIZE:
 776             parselist++;
 777             {
 778                GLint size = *parselist++;
 779                accumGreenSize = MAX2( accumGreenSize, size );
 780             }
 781             break;
 782          case GLX_ACCUM_BLUE_SIZE:
 783             parselist++;
 784             {
 785                GLint size = *parselist++;
 786                accumBlueSize = MAX2( accumBlueSize, size );
 787             }
 788             break;
 789          case GLX_ACCUM_ALPHA_SIZE:
 790             parselist++;
 791             {
 792                GLint size = *parselist++;
 793                accumAlphaSize = MAX2( accumAlphaSize, size );
 794             }
 795             break;
 796
 797          /*
 798           * GLX_EXT_visual_info extension
 799           */
 800          case GLX_X_VISUAL_TYPE_EXT:
 801             parselist++;
 802             visual_type = *parselist++;
 803             break;
 804          case GLX_TRANSPARENT_TYPE_EXT:
 805             parselist++;
 806             trans_type = *parselist++;
 807             break;
 808          case GLX_TRANSPARENT_INDEX_VALUE_EXT:
 809             parselist++;
 810             trans_value = *parselist++;
 811             break;
 812          case GLX_TRANSPARENT_RED_VALUE_EXT:
 813          case GLX_TRANSPARENT_GREEN_VALUE_EXT:
 814          case GLX_TRANSPARENT_BLUE_VALUE_EXT:
 815          case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
 816             /* ignore */
 817             parselist++;
 818             parselist++;
 819             break;
 820
 821          /*
 822           * GLX_EXT_visual_info extension
 823           */
 824          case GLX_VISUAL_CAVEAT_EXT:
 825             parselist++;
 826             caveat = *parselist++; /* ignored for now */
 827             break;
 828
 829          /*
 830           * GLX_ARB_multisample
 831           */
 832          case GLX_SAMPLE_BUFFERS_ARB:
 833             /* ms not supported */
 834             return NULL;
 835          case GLX_SAMPLES_ARB:
 836             /* ms not supported */
 837             return NULL;
 838
 839          /*
 840           * FBConfig attribs.
 841           */
 842          case GLX_RENDER_TYPE:
 843             if (!fbConfig)
 844                return NULL;
 845             parselist++;
 846             if (*parselist & GLX_RGBA_BIT) {
 847                rgb_flag = GL_TRUE;
 848             }
 849             else if (*parselist & GLX_COLOR_INDEX_BIT) {
 850                rgb_flag = GL_FALSE;
 851             }
 852             else if (*parselist == 0) {
 853                rgb_flag = GL_TRUE;
 854             }
 855             parselist++;
 856             break;
 857          case GLX_DRAWABLE_TYPE:
 858             if (!fbConfig)
 859                return NULL;
 860             parselist++;
 861             if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
 862                return NULL; /* bad bit */
 863             }
 864             parselist++;
 865             break;
 866          case GLX_FBCONFIG_ID:
 867          case GLX_VISUAL_ID:
 868             if (!fbConfig)
 869                return NULL;
 870             parselist++;
 871             desiredVisualID = *parselist++;
 872             break;
 873          case GLX_X_RENDERABLE:
 874          case GLX_MAX_PBUFFER_WIDTH:
 875          case GLX_MAX_PBUFFER_HEIGHT:
 876          case GLX_MAX_PBUFFER_PIXELS:
 877             if (!fbConfig)
 878                return NULL; /* invalid config option */
 879             parselist += 2; /* ignore the parameter */
 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 /**
1025  * Helper function used by other glXCreateContext functions.
1026  */
1027 static GLXContext
1028 create_context(Display *dpy, XMesaVisual xmvis,
1029                XMesaContext shareCtx, Bool direct,
1030                unsigned major, unsigned minor,
1031                unsigned profileMask, unsigned contextFlags)
1032 {
1033    GLXContext glxCtx;
1034
1035    if (!dpy || !xmvis)
1036       return 0;
1037
1038    glxCtx = CALLOC_STRUCT(__GLXcontextRec);
1039    if (!glxCtx)
1040       return 0;
1041
1042    /* deallocate unused windows/buffers */
1043 #if 0
1044    XMesaGarbageCollect();
1045 #endif
1046
1047    glxCtx->xmesaContext = XMesaCreateContext(xmvis, shareCtx, major, minor,
1048                                              profileMask, contextFlags);
1049    if (!glxCtx->xmesaContext) {
1050       free(glxCtx);
1051       return NULL;
1052    }
1053
1054    glxCtx->isDirect = DEFAULT_DIRECT;
1055    glxCtx->currentDpy = dpy;
1056    glxCtx->xid = (XID) glxCtx;  /* self pointer */
1057
1058    return glxCtx;
1059 }
1060
1061
1062 PUBLIC GLXContext
1063 glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1064                   GLXContext shareCtx, Bool direct )
1065 {
1066    XMesaVisual xmvis;
1067
1068    xmvis = find_glx_visual( dpy, visinfo );
1069    if (!xmvis) {
1070       /* This visual wasn't found with glXChooseVisual() */
1071       xmvis = create_glx_visual( dpy, visinfo );
1072       if (!xmvis) {
1073          /* unusable visual */
1074          return NULL;
1075       }
1076    }
1077
1078    return create_context(dpy, xmvis,
1079                          shareCtx ? shareCtx->xmesaContext : NULL,
1080                          direct,
1081                          1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
1082 }
1083
1084
1085 /* XXX these may have to be removed due to thread-safety issues. */
1086 static GLXContext MakeCurrent_PrevContext = 0;
1087 static GLXDrawable MakeCurrent_PrevDrawable = 0;
1088 static GLXDrawable MakeCurrent_PrevReadable = 0;
1089 static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1090 static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1091
1092
1093 /* GLX 1.3 and later */
1094 PUBLIC Bool
1095 glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1096                        GLXDrawable read, GLXContext ctx )
1097 {
1098    GLXContext glxCtx = ctx;
1099    static boolean firsttime = 1, no_rast = 0;
1100
1101    if (firsttime) {
1102       no_rast = getenv("SP_NO_RAST") != NULL;
1103       firsttime = 0;
1104    }
1105
1106    if (ctx && draw && read) {
1107       XMesaBuffer drawBuffer, readBuffer;
1108       XMesaContext xmctx = glxCtx->xmesaContext;
1109
1110       /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1111       if (ctx == MakeCurrent_PrevContext
1112           && draw == MakeCurrent_PrevDrawable) {
1113          drawBuffer = MakeCurrent_PrevDrawBuffer;
1114       }
1115       else {
1116          drawBuffer = XMesaFindBuffer( dpy, draw );
1117       }
1118       if (!drawBuffer) {
1119          /* drawable must be a new window! */
1120          drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1121          if (!drawBuffer) {
1122             /* Out of memory, or context/drawable depth mismatch */
1123             return False;
1124          }
1125       }
1126
1127       /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1128       if (ctx == MakeCurrent_PrevContext
1129           && read == MakeCurrent_PrevReadable) {
1130          readBuffer = MakeCurrent_PrevReadBuffer;
1131       }
1132       else {
1133          readBuffer = XMesaFindBuffer( dpy, read );
1134       }
1135       if (!readBuffer) {
1136          /* drawable must be a new window! */
1137          readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1138          if (!readBuffer) {
1139             /* Out of memory, or context/drawable depth mismatch */
1140             return False;
1141          }
1142       }
1143
1144       if (no_rast &&
1145           MakeCurrent_PrevContext == ctx &&
1146           MakeCurrent_PrevDrawable == draw &&
1147           MakeCurrent_PrevReadable == read &&
1148           MakeCurrent_PrevDrawBuffer == drawBuffer &&
1149           MakeCurrent_PrevReadBuffer == readBuffer)
1150          return True;
1151
1152       MakeCurrent_PrevContext = ctx;
1153       MakeCurrent_PrevDrawable = draw;
1154       MakeCurrent_PrevReadable = read;
1155       MakeCurrent_PrevDrawBuffer = drawBuffer;
1156       MakeCurrent_PrevReadBuffer = readBuffer;
1157
1158       /* Now make current! */
1159       if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1160          ctx->currentDpy = dpy;
1161          ctx->currentDrawable = draw;
1162          ctx->currentReadable = read;
1163          SetCurrentContext(ctx);
1164          return True;
1165       }
1166       else {
1167          return False;
1168       }
1169    }
1170    else if (!ctx && !draw && !read) {
1171       /* release current context w/out assigning new one. */
1172       XMesaMakeCurrent2( NULL, NULL, NULL );
1173       MakeCurrent_PrevContext = 0;
1174       MakeCurrent_PrevDrawable = 0;
1175       MakeCurrent_PrevReadable = 0;
1176       MakeCurrent_PrevDrawBuffer = 0;
1177       MakeCurrent_PrevReadBuffer = 0;
1178       SetCurrentContext(NULL);
1179       return True;
1180    }
1181    else {
1182       /* The args must either all be non-zero or all zero.
1183        * This is an error.
1184        */
1185       return False;
1186    }
1187 }
1188
1189
1190 PUBLIC Bool
1191 glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1192 {
1193    return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1194 }
1195
1196
1197 PUBLIC GLXContext
1198 glXGetCurrentContext(void)
1199 {
1200    return GetCurrentContext();
1201 }
1202
1203
1204 PUBLIC Display *
1205 glXGetCurrentDisplay(void)
1206 {
1207    GLXContext glxCtx = glXGetCurrentContext();
1208
1209    return glxCtx ? glxCtx->currentDpy : NULL;
1210 }
1211
1212
1213 PUBLIC Display *
1214 glXGetCurrentDisplayEXT(void)
1215 {
1216    return glXGetCurrentDisplay();
1217 }
1218
1219
1220 PUBLIC GLXDrawable
1221 glXGetCurrentDrawable(void)
1222 {
1223    GLXContext gc = glXGetCurrentContext();
1224    return gc ? gc->currentDrawable : 0;
1225 }
1226
1227
1228 PUBLIC GLXDrawable
1229 glXGetCurrentReadDrawable(void)
1230 {
1231    GLXContext gc = glXGetCurrentContext();
1232    return gc ? gc->currentReadable : 0;
1233 }
1234
1235
1236 PUBLIC GLXDrawable
1237 glXGetCurrentReadDrawableSGI(void)
1238 {
1239    return glXGetCurrentReadDrawable();
1240 }
1241
1242
1243 PUBLIC GLXPixmap
1244 glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1245 {
1246    XMesaVisual v;
1247    XMesaBuffer b;
1248
1249    v = find_glx_visual( dpy, visinfo );
1250    if (!v) {
1251       v = create_glx_visual( dpy, visinfo );
1252       if (!v) {
1253          /* unusable visual */
1254          return 0;
1255       }
1256    }
1257
1258    b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1259    if (!b) {
1260       return 0;
1261    }
1262    return b->ws.drawable;
1263 }
1264
1265
1266 /*** GLX_MESA_pixmap_colormap ***/
1267
1268 PUBLIC GLXPixmap
1269 glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1270                         Pixmap pixmap, Colormap cmap )
1271 {
1272    XMesaVisual v;
1273    XMesaBuffer b;
1274
1275    v = find_glx_visual( dpy, visinfo );
1276    if (!v) {
1277       v = create_glx_visual( dpy, visinfo );
1278       if (!v) {
1279          /* unusable visual */
1280          return 0;
1281       }
1282    }
1283
1284    b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1285    if (!b) {
1286       return 0;
1287    }
1288    return b->ws.drawable;
1289 }
1290
1291
1292 PUBLIC void
1293 glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1294 {
1295    XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1296    if (b) {
1297       XMesaDestroyBuffer(b);
1298    }
1299    else if (_mesa_getenv("MESA_DEBUG")) {
1300       _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1301    }
1302 }
1303
1304
1305 PUBLIC void
1306 glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1307                 unsigned long mask )
1308 {
1309    XMesaContext xm_src = src->xmesaContext;
1310    XMesaContext xm_dst = dst->xmesaContext;
1311    (void) dpy;
1312    if (MakeCurrent_PrevContext == src) {
1313       glFlush();
1314    }
1315    XMesaCopyContext(xm_src, xm_dst, mask);
1316 }
1317
1318
1319 PUBLIC Bool
1320 glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
1321 {
1322    int op, ev, err;
1323    /* Mesa's GLX isn't really an X extension but we try to act like one. */
1324    if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
1325       ev = err = 0;
1326    if (errorBase)
1327       *errorBase = err;
1328    if (eventBase)
1329       *eventBase = ev;
1330    return True; /* we're faking GLX so always return success */
1331 }
1332
1333
1334 PUBLIC void
1335 glXDestroyContext( Display *dpy, GLXContext ctx )
1336 {
1337    GLXContext glxCtx = ctx;
1338    (void) dpy;
1339    MakeCurrent_PrevContext = 0;
1340    MakeCurrent_PrevDrawable = 0;
1341    MakeCurrent_PrevReadable = 0;
1342    MakeCurrent_PrevDrawBuffer = 0;
1343    MakeCurrent_PrevReadBuffer = 0;
1344    XMesaDestroyContext( glxCtx->xmesaContext );
1345    XMesaGarbageCollect();
1346    free(glxCtx);
1347 }
1348
1349
1350 PUBLIC Bool
1351 glXIsDirect( Display *dpy, GLXContext ctx )
1352 {
1353    GLXContext glxCtx = ctx;
1354    (void) ctx;
1355    return glxCtx->isDirect;
1356 }
1357
1358
1359
1360 PUBLIC void
1361 glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1362 {
1363    XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1364    static boolean firsttime = 1, no_rast = 0;
1365
1366    if (firsttime) {
1367       no_rast = getenv("SP_NO_RAST") != NULL;
1368       firsttime = 0;
1369    }
1370
1371    if (no_rast)
1372       return;
1373
1374    if (buffer) {
1375       XMesaSwapBuffers(buffer);
1376    }
1377    else if (_mesa_getenv("MESA_DEBUG")) {
1378       _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1379                     (int) drawable);
1380    }
1381 }
1382
1383
1384
1385 /*** GLX_MESA_copy_sub_buffer ***/
1386
1387 PUBLIC void
1388 glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable,
1389                      int x, int y, int width, int height)
1390 {
1391    XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1392    if (buffer) {
1393       XMesaCopySubBuffer(buffer, x, y, width, height);
1394    }
1395    else if (_mesa_getenv("MESA_DEBUG")) {
1396       _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1397    }
1398 }
1399
1400
1401 PUBLIC Bool
1402 glXQueryVersion( Display *dpy, int *maj, int *min )
1403 {
1404    (void) dpy;
1405    /* Return GLX version, not Mesa version */
1406    assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1407    *maj = CLIENT_MAJOR_VERSION;
1408    *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1409    return True;
1410 }
1411
1412
1413 /*
1414  * Query the GLX attributes of the given XVisualInfo.
1415  */
1416 static int
1417 get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1418 {
1419    ASSERT(xmvis);
1420    switch(attrib) {
1421       case GLX_USE_GL:
1422          if (fbconfig)
1423             return GLX_BAD_ATTRIBUTE;
1424          *value = (int) True;
1425          return 0;
1426       case GLX_BUFFER_SIZE:
1427          *value = xmvis->visinfo->depth;
1428          return 0;
1429       case GLX_LEVEL:
1430          *value = xmvis->mesa_visual.level;
1431          return 0;
1432       case GLX_RGBA:
1433          if (fbconfig)
1434             return GLX_BAD_ATTRIBUTE;
1435          if (xmvis->mesa_visual.rgbMode) {
1436             *value = True;
1437          }
1438          else {
1439             *value = False;
1440          }
1441          return 0;
1442       case GLX_DOUBLEBUFFER:
1443          *value = (int) xmvis->mesa_visual.doubleBufferMode;
1444          return 0;
1445       case GLX_STEREO:
1446          *value = (int) xmvis->mesa_visual.stereoMode;
1447          return 0;
1448       case GLX_AUX_BUFFERS:
1449          *value = xmvis->mesa_visual.numAuxBuffers;
1450          return 0;
1451       case GLX_RED_SIZE:
1452          *value = xmvis->mesa_visual.redBits;
1453          return 0;
1454       case GLX_GREEN_SIZE:
1455          *value = xmvis->mesa_visual.greenBits;
1456          return 0;
1457       case GLX_BLUE_SIZE:
1458          *value = xmvis->mesa_visual.blueBits;
1459          return 0;
1460       case GLX_ALPHA_SIZE:
1461          *value = xmvis->mesa_visual.alphaBits;
1462          return 0;
1463       case GLX_DEPTH_SIZE:
1464          *value = xmvis->mesa_visual.depthBits;
1465          return 0;
1466       case GLX_STENCIL_SIZE:
1467          *value = xmvis->mesa_visual.stencilBits;
1468          return 0;
1469       case GLX_ACCUM_RED_SIZE:
1470          *value = xmvis->mesa_visual.accumRedBits;
1471          return 0;
1472       case GLX_ACCUM_GREEN_SIZE:
1473          *value = xmvis->mesa_visual.accumGreenBits;
1474          return 0;
1475       case GLX_ACCUM_BLUE_SIZE:
1476          *value = xmvis->mesa_visual.accumBlueBits;
1477          return 0;
1478       case GLX_ACCUM_ALPHA_SIZE:
1479          *value = xmvis->mesa_visual.accumAlphaBits;
1480          return 0;
1481
1482       /*
1483        * GLX_EXT_visual_info extension
1484        */
1485       case GLX_X_VISUAL_TYPE_EXT:
1486          switch (xmvis->visinfo->CLASS) {
1487             case StaticGray:   *value = GLX_STATIC_GRAY_EXT;   return 0;
1488             case GrayScale:    *value = GLX_GRAY_SCALE_EXT;    return 0;
1489             case StaticColor:  *value = GLX_STATIC_GRAY_EXT;   return 0;
1490             case PseudoColor:  *value = GLX_PSEUDO_COLOR_EXT;  return 0;
1491             case TrueColor:    *value = GLX_TRUE_COLOR_EXT;    return 0;
1492             case DirectColor:  *value = GLX_DIRECT_COLOR_EXT;  return 0;
1493          }
1494          return 0;
1495       case GLX_TRANSPARENT_TYPE_EXT:
1496          /* normal planes */
1497          *value = GLX_NONE_EXT;
1498          return 0;
1499       case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1500          /* undefined */
1501          return 0;
1502       case GLX_TRANSPARENT_RED_VALUE_EXT:
1503          /* undefined */
1504          return 0;
1505       case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1506          /* undefined */
1507          return 0;
1508       case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1509          /* undefined */
1510          return 0;
1511       case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1512          /* undefined */
1513          return 0;
1514
1515       /*
1516        * GLX_EXT_visual_info extension
1517        */
1518       case GLX_VISUAL_CAVEAT_EXT:
1519          /* test for zero, just in case */
1520          if (xmvis->mesa_visual.visualRating > 0)
1521             *value = xmvis->mesa_visual.visualRating;
1522          else
1523             *value = GLX_NONE_EXT;
1524          return 0;
1525
1526       /*
1527        * GLX_ARB_multisample
1528        */
1529       case GLX_SAMPLE_BUFFERS_ARB:
1530          *value = 0;
1531          return 0;
1532       case GLX_SAMPLES_ARB:
1533          *value = 0;
1534          return 0;
1535
1536       /*
1537        * For FBConfigs:
1538        */
1539       case GLX_SCREEN_EXT:
1540          if (!fbconfig)
1541             return GLX_BAD_ATTRIBUTE;
1542          *value = xmvis->visinfo->screen;
1543          break;
1544       case GLX_DRAWABLE_TYPE: /*SGIX too */
1545          if (!fbconfig)
1546             return GLX_BAD_ATTRIBUTE;
1547          *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1548          break;
1549       case GLX_RENDER_TYPE_SGIX:
1550          if (!fbconfig)
1551             return GLX_BAD_ATTRIBUTE;
1552          if (xmvis->mesa_visual.rgbMode)
1553             *value = GLX_RGBA_BIT;
1554          else
1555             *value = GLX_COLOR_INDEX_BIT;
1556          break;
1557       case GLX_X_RENDERABLE_SGIX:
1558          if (!fbconfig)
1559             return GLX_BAD_ATTRIBUTE;
1560          *value = True; /* XXX really? */
1561          break;
1562       case GLX_FBCONFIG_ID_SGIX:
1563          if (!fbconfig)
1564             return GLX_BAD_ATTRIBUTE;
1565          *value = xmvis->visinfo->visualid;
1566          break;
1567       case GLX_MAX_PBUFFER_WIDTH:
1568          if (!fbconfig)
1569             return GLX_BAD_ATTRIBUTE;
1570          /* XXX or MAX_WIDTH? */
1571          *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1572          break;
1573       case GLX_MAX_PBUFFER_HEIGHT:
1574          if (!fbconfig)
1575             return GLX_BAD_ATTRIBUTE;
1576          *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1577          break;
1578       case GLX_MAX_PBUFFER_PIXELS:
1579          if (!fbconfig)
1580             return GLX_BAD_ATTRIBUTE;
1581          *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1582                   DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1583          break;
1584       case GLX_VISUAL_ID:
1585          if (!fbconfig)
1586             return GLX_BAD_ATTRIBUTE;
1587          *value = xmvis->visinfo->visualid;
1588          break;
1589
1590 #ifdef GLX_EXT_texture_from_pixmap
1591       case GLX_BIND_TO_TEXTURE_RGB_EXT:
1592          *value = True; /*XXX*/
1593          break;
1594       case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1595          /* XXX review */
1596          *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1597          break;
1598       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1599          *value = True; /*XXX*/
1600          break;
1601       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1602          *value = (GLX_TEXTURE_1D_BIT_EXT |
1603                    GLX_TEXTURE_2D_BIT_EXT |
1604                    GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1605          break;
1606       case GLX_Y_INVERTED_EXT:
1607          *value = True; /*XXX*/
1608          break;
1609 #endif
1610
1611       default:
1612          return GLX_BAD_ATTRIBUTE;
1613    }
1614    return Success;
1615 }
1616
1617
1618 PUBLIC int
1619 glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1620                    int attrib, int *value )
1621 {
1622    XMesaVisual xmvis;
1623    int k;
1624    if (!dpy || !visinfo)
1625       return GLX_BAD_ATTRIBUTE;
1626
1627    xmvis = find_glx_visual( dpy, visinfo );
1628    if (!xmvis) {
1629       /* this visual wasn't obtained with glXChooseVisual */
1630       xmvis = create_glx_visual( dpy, visinfo );
1631       if (!xmvis) {
1632          /* this visual can't be used for GL rendering */
1633          if (attrib==GLX_USE_GL) {
1634             *value = (int) False;
1635             return 0;
1636          }
1637          else {
1638             return GLX_BAD_VISUAL;
1639          }
1640       }
1641    }
1642
1643    k = get_config(xmvis, attrib, value, GL_FALSE);
1644    return k;
1645 }
1646
1647
1648 PUBLIC void
1649 glXWaitGL( void )
1650 {
1651    XMesaContext xmesa = XMesaGetCurrentContext();
1652    XMesaFlush( xmesa );
1653 }
1654
1655
1656
1657 PUBLIC void
1658 glXWaitX( void )
1659 {
1660    XMesaContext xmesa = XMesaGetCurrentContext();
1661    XMesaFlush( xmesa );
1662 }
1663
1664
1665 static const char *
1666 get_extensions( void )
1667 {
1668    return EXTENSIONS;
1669 }
1670
1671
1672
1673 /* GLX 1.1 and later */
1674 PUBLIC const char *
1675 glXQueryExtensionsString( Display *dpy, int screen )
1676 {
1677    (void) dpy;
1678    (void) screen;
1679    return get_extensions();
1680 }
1681
1682
1683
1684 /* GLX 1.1 and later */
1685 PUBLIC const char *
1686 glXQueryServerString( Display *dpy, int screen, int name )
1687 {
1688    static char version[1000];
1689    sprintf(version, "%d.%d %s",
1690            SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, xmesa_get_name());
1691
1692    (void) dpy;
1693    (void) screen;
1694
1695    switch (name) {
1696       case GLX_EXTENSIONS:
1697          return get_extensions();
1698       case GLX_VENDOR:
1699          return VENDOR;
1700       case GLX_VERSION:
1701          return version;
1702       default:
1703          return NULL;
1704    }
1705 }
1706
1707
1708
1709 /* GLX 1.1 and later */
1710 PUBLIC const char *
1711 glXGetClientString( Display *dpy, int name )
1712 {
1713    static char version[1000];
1714    sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1715            CLIENT_MINOR_VERSION, xmesa_get_name());
1716
1717    (void) dpy;
1718
1719    switch (name) {
1720       case GLX_EXTENSIONS:
1721          return get_extensions();
1722       case GLX_VENDOR:
1723          return VENDOR;
1724       case GLX_VERSION:
1725          return version;
1726       default:
1727          return NULL;
1728    }
1729 }
1730
1731
1732
1733 /*
1734  * GLX 1.3 and later
1735  */
1736
1737
1738 PUBLIC int
1739 glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config,
1740                      int attribute, int *value)
1741 {
1742    XMesaVisual v = (XMesaVisual) config;
1743    (void) dpy;
1744    (void) config;
1745
1746    if (!dpy || !config || !value)
1747       return -1;
1748
1749    return get_config(v, attribute, value, GL_TRUE);
1750 }
1751
1752
1753 PUBLIC GLXFBConfig *
1754 glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1755 {
1756    XVisualInfo *visuals, visTemplate;
1757    const long visMask = VisualScreenMask;
1758    int i;
1759
1760    /* Get list of all X visuals */
1761    visTemplate.screen = screen;
1762    visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1763    if (*nelements > 0) {
1764       XMesaVisual *results;
1765       results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
1766       if (!results) {
1767          *nelements = 0;
1768          return NULL;
1769       }
1770       for (i = 0; i < *nelements; i++) {
1771          results[i] = create_glx_visual(dpy, visuals + i);
1772          if (!results[i]) {
1773             *nelements = i;
1774             break;
1775          }
1776       }
1777       return (GLXFBConfig *) results;
1778    }
1779    return NULL;
1780 }
1781
1782
1783 PUBLIC GLXFBConfig *
1784 glXChooseFBConfig(Display *dpy, int screen,
1785                   const int *attribList, int *nitems)
1786 {
1787    XMesaVisual xmvis;
1788
1789    if (!attribList || !attribList[0]) {
1790       /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1791       return glXGetFBConfigs(dpy, screen, nitems);
1792    }
1793
1794    xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1795    if (xmvis) {
1796       GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
1797       if (!config) {
1798          *nitems = 0;
1799          return NULL;
1800       }
1801       *nitems = 1;
1802       config[0] = (GLXFBConfig) xmvis;
1803       return (GLXFBConfig *) config;
1804    }
1805    else {
1806       *nitems = 0;
1807       return NULL;
1808    }
1809 }
1810
1811
1812 PUBLIC XVisualInfo *
1813 glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1814 {
1815    if (dpy && config) {
1816       XMesaVisual xmvis = (XMesaVisual) config;
1817 #if 0
1818       return xmvis->vishandle;
1819 #else
1820       /* create a new vishandle - the cached one may be stale */
1821       xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1822       if (xmvis->vishandle) {
1823          memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1824       }
1825       return xmvis->vishandle;
1826 #endif
1827    }
1828    else {
1829       return NULL;
1830    }
1831 }
1832
1833
1834 PUBLIC GLXWindow
1835 glXCreateWindow(Display *dpy, GLXFBConfig config, Window win,
1836                 const int *attribList)
1837 {
1838    XMesaVisual xmvis = (XMesaVisual) config;
1839    XMesaBuffer xmbuf;
1840    if (!xmvis)
1841       return 0;
1842
1843    xmbuf = XMesaCreateWindowBuffer(xmvis, win);
1844    if (!xmbuf)
1845       return 0;
1846
1847    (void) dpy;
1848    (void) attribList;  /* Ignored in GLX 1.3 */
1849
1850    return win;  /* A hack for now */
1851 }
1852
1853
1854 PUBLIC void
1855 glXDestroyWindow( Display *dpy, GLXWindow window )
1856 {
1857    XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
1858    if (b)
1859       XMesaDestroyBuffer(b);
1860    /* don't destroy X window */
1861 }
1862
1863
1864 /* XXX untested */
1865 PUBLIC GLXPixmap
1866 glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap,
1867                 const int *attribList)
1868 {
1869    XMesaVisual v = (XMesaVisual) config;
1870    XMesaBuffer b;
1871    const int *attr;
1872    int target = 0, format = 0, mipmap = 0;
1873    int value;
1874
1875    if (!dpy || !config || !pixmap)
1876       return 0;
1877
1878    for (attr = attribList; attr && *attr; attr++) {
1879       switch (*attr) {
1880       case GLX_TEXTURE_FORMAT_EXT:
1881          attr++;
1882          switch (*attr) {
1883          case GLX_TEXTURE_FORMAT_NONE_EXT:
1884          case GLX_TEXTURE_FORMAT_RGB_EXT:
1885          case GLX_TEXTURE_FORMAT_RGBA_EXT:
1886             format = *attr;
1887             break;
1888          default:
1889             /* error */
1890             return 0;
1891          }
1892          break;
1893       case GLX_TEXTURE_TARGET_EXT:
1894          attr++;
1895          switch (*attr) {
1896          case GLX_TEXTURE_1D_EXT:
1897          case GLX_TEXTURE_2D_EXT:
1898          case GLX_TEXTURE_RECTANGLE_EXT:
1899             target = *attr;
1900             break;
1901          default:
1902             /* error */
1903             return 0;
1904          }
1905          break;
1906       case GLX_MIPMAP_TEXTURE_EXT:
1907          attr++;
1908          if (*attr)
1909             mipmap = 1;
1910          break;
1911       default:
1912          /* error */
1913          return 0;
1914       }
1915    }
1916
1917    if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
1918       if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
1919                      &value, GL_TRUE) != Success
1920           || !value) {
1921          return 0; /* error! */
1922       }
1923    }
1924    else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1925       if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
1926                      &value, GL_TRUE) != Success
1927           || !value) {
1928          return 0; /* error! */
1929       }
1930    }
1931    if (mipmap) {
1932       if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
1933                      &value, GL_TRUE) != Success
1934           || !value) {
1935          return 0; /* error! */
1936       }
1937    }
1938    if (target == GLX_TEXTURE_1D_EXT) {
1939       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1940                      &value, GL_TRUE) != Success
1941           || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
1942          return 0; /* error! */
1943       }
1944    }
1945    else if (target == GLX_TEXTURE_2D_EXT) {
1946       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1947                      &value, GL_TRUE) != Success
1948           || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
1949          return 0; /* error! */
1950       }
1951    }
1952    if (target == GLX_TEXTURE_RECTANGLE_EXT) {
1953       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1954                      &value, GL_TRUE) != Success
1955           || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
1956          return 0; /* error! */
1957       }
1958    }
1959
1960    if (format || target || mipmap) {
1961       /* texture from pixmap */
1962       b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
1963    }
1964    else {
1965       b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1966    }
1967    if (!b) {
1968       return 0;
1969    }
1970
1971    return pixmap;
1972 }
1973
1974
1975 PUBLIC void
1976 glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1977 {
1978    XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
1979    if (b)
1980       XMesaDestroyBuffer(b);
1981    /* don't destroy X pixmap */
1982 }
1983
1984
1985 PUBLIC GLXPbuffer
1986 glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
1987 {
1988    XMesaVisual xmvis = (XMesaVisual) config;
1989    XMesaBuffer xmbuf;
1990    const int *attrib;
1991    int width = 0, height = 0;
1992    GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
1993
1994    (void) dpy;
1995
1996    for (attrib = attribList; *attrib; attrib++) {
1997       switch (*attrib) {
1998          case GLX_PBUFFER_WIDTH:
1999             attrib++;
2000             width = *attrib;
2001             break;
2002          case GLX_PBUFFER_HEIGHT:
2003             attrib++;
2004             height = *attrib;
2005             break;
2006          case GLX_PRESERVED_CONTENTS:
2007             attrib++;
2008             preserveContents = *attrib;
2009             break;
2010          case GLX_LARGEST_PBUFFER:
2011             attrib++;
2012             useLargest = *attrib;
2013             break;
2014          default:
2015             return 0;
2016       }
2017    }
2018
2019    if (width == 0 || height == 0)
2020       return 0;
2021
2022    if (width > MAX_WIDTH || height > MAX_HEIGHT) {
2023       /* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
2024        * allocate the largest possible buffer.
2025        */
2026       if (useLargest) {
2027          width = MAX_WIDTH;
2028          height = MAX_HEIGHT;
2029       }
2030    }
2031
2032    xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2033    /* A GLXPbuffer handle must be an X Drawable because that's what
2034     * glXMakeCurrent takes.
2035     */
2036    if (xmbuf) {
2037       xmbuf->largestPbuffer = useLargest;
2038       xmbuf->preservedContents = preserveContents;
2039       return (GLXPbuffer) xmbuf->ws.drawable;
2040    }
2041    else {
2042       return 0;
2043    }
2044 }
2045
2046
2047 PUBLIC void
2048 glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2049 {
2050    XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2051    if (b) {
2052       XMesaDestroyBuffer(b);
2053    }
2054 }
2055
2056
2057 PUBLIC void
2058 glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute,
2059                  unsigned int *value)
2060 {
2061    GLuint width, height;
2062    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2063    if (!xmbuf)
2064       return;
2065
2066    /* make sure buffer's dimensions are up to date */
2067    xmesa_get_window_size(dpy, xmbuf, &width, &height);
2068
2069    switch (attribute) {
2070       case GLX_WIDTH:
2071          *value = width;
2072          break;
2073       case GLX_HEIGHT:
2074          *value = height;
2075          break;
2076       case GLX_PRESERVED_CONTENTS:
2077          *value = xmbuf->preservedContents;
2078          break;
2079       case GLX_LARGEST_PBUFFER:
2080          *value = xmbuf->largestPbuffer;
2081          break;
2082       case GLX_FBCONFIG_ID:
2083          *value = xmbuf->xm_visual->visinfo->visualid;
2084          return;
2085 #ifdef GLX_EXT_texture_from_pixmap
2086       case GLX_TEXTURE_FORMAT_EXT:
2087          *value = xmbuf->TextureFormat;
2088          break;
2089       case GLX_TEXTURE_TARGET_EXT:
2090          *value = xmbuf->TextureTarget;
2091          break;
2092       case GLX_MIPMAP_TEXTURE_EXT:
2093          *value = xmbuf->TextureMipmap;
2094          break;
2095 #endif
2096
2097       default:
2098          return; /* raise BadValue error */
2099    }
2100 }
2101
2102
2103 PUBLIC GLXContext
2104 glXCreateNewContext( Display *dpy, GLXFBConfig config,
2105                      int renderType, GLXContext shareCtx, Bool direct )
2106 {
2107    XMesaVisual xmvis = (XMesaVisual) config;
2108
2109    if (!dpy || !config ||
2110        (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2111       return 0;
2112
2113    return create_context(dpy, xmvis,
2114                          shareCtx ? shareCtx->xmesaContext : NULL,
2115                          direct,
2116                          1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2117 }
2118
2119
2120 PUBLIC int
2121 glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2122 {
2123    GLXContext glxCtx = ctx;
2124    XMesaContext xmctx = glxCtx->xmesaContext;
2125
2126    (void) dpy;
2127    (void) ctx;
2128
2129    switch (attribute) {
2130    case GLX_FBCONFIG_ID:
2131       *value = xmctx->xm_visual->visinfo->visualid;
2132       break;
2133    case GLX_RENDER_TYPE:
2134       if (xmctx->xm_visual->mesa_visual.rgbMode)
2135          *value = GLX_RGBA_TYPE;
2136       else
2137          *value = GLX_COLOR_INDEX_TYPE;
2138       break;
2139    case GLX_SCREEN:
2140       *value = 0;
2141       return Success;
2142    default:
2143       return GLX_BAD_ATTRIBUTE;
2144    }
2145    return 0;
2146 }
2147
2148
2149 PUBLIC void
2150 glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2151 {
2152    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2153    if (xmbuf)
2154       xmbuf->selectedEvents = mask;
2155 }
2156
2157
2158 PUBLIC void
2159 glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2160 {
2161    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2162    if (xmbuf)
2163       *mask = xmbuf->selectedEvents;
2164    else
2165       *mask = 0;
2166 }
2167
2168
2169
2170 /*** GLX_SGI_swap_control ***/
2171
2172 PUBLIC int
2173 glXSwapIntervalSGI(int interval)
2174 {
2175    (void) interval;
2176    return 0;
2177 }
2178
2179
2180
2181 /*** GLX_SGI_video_sync ***/
2182
2183 static unsigned int FrameCounter = 0;
2184
2185 PUBLIC int
2186 glXGetVideoSyncSGI(unsigned int *count)
2187 {
2188    /* this is a bogus implementation */
2189    *count = FrameCounter++;
2190    return 0;
2191 }
2192
2193 PUBLIC int
2194 glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2195 {
2196    if (divisor <= 0 || remainder < 0)
2197       return GLX_BAD_VALUE;
2198    /* this is a bogus implementation */
2199    FrameCounter++;
2200    while (FrameCounter % divisor != remainder)
2201       FrameCounter++;
2202    *count = FrameCounter;
2203    return 0;
2204 }
2205
2206
2207
2208 /*** GLX_SGI_make_current_read ***/
2209
2210 PUBLIC Bool
2211 glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read,
2212                       GLXContext ctx)
2213 {
2214    return glXMakeContextCurrent( dpy, draw, read, ctx );
2215 }
2216
2217 /* not used
2218 static GLXDrawable
2219 glXGetCurrentReadDrawableSGI(void)
2220 {
2221    return 0;
2222 }
2223 */
2224
2225
2226 /*** GLX_SGIX_video_source ***/
2227 #if defined(_VL_H)
2228
2229 PUBLIC GLXVideoSourceSGIX
2230 glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server,
2231                             VLPath path, int nodeClass, VLNode drainNode)
2232 {
2233    (void) dpy;
2234    (void) screen;
2235    (void) server;
2236    (void) path;
2237    (void) nodeClass;
2238    (void) drainNode;
2239    return 0;
2240 }
2241
2242 PUBLIC void
2243 glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2244 {
2245    (void) dpy;
2246    (void) src;
2247 }
2248
2249 #endif
2250
2251
2252 /*** GLX_EXT_import_context ***/
2253
2254 PUBLIC void
2255 glXFreeContextEXT(Display *dpy, GLXContext context)
2256 {
2257    (void) dpy;
2258    (void) context;
2259 }
2260
2261 PUBLIC GLXContextID
2262 glXGetContextIDEXT(const GLXContext context)
2263 {
2264    (void) context;
2265    return 0;
2266 }
2267
2268 PUBLIC GLXContext
2269 glXImportContextEXT(Display *dpy, GLXContextID contextID)
2270 {
2271    (void) dpy;
2272    (void) contextID;
2273    return 0;
2274 }
2275
2276 PUBLIC int
2277 glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,
2278                        int *value)
2279 {
2280    (void) dpy;
2281    (void) context;
2282    (void) attribute;
2283    (void) value;
2284    return 0;
2285 }
2286
2287
2288
2289 /*** GLX_SGIX_fbconfig ***/
2290
2291 PUBLIC int
2292 glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config,
2293                          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,
2300                       int *nelements)
2301 {
2302    return (GLXFBConfig *) glXChooseFBConfig(dpy, screen,
2303                                             attrib_list, nelements);
2304 }
2305
2306
2307 PUBLIC GLXPixmap
2308 glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2309                                  Pixmap pixmap)
2310 {
2311    XMesaVisual xmvis = (XMesaVisual) config;
2312    XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2313    return xmbuf->ws.drawable; /* need to return an X ID */
2314 }
2315
2316
2317 PUBLIC GLXContext
2318 glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2319                                int renderType, GLXContext shareCtx,
2320                                Bool direct)
2321 {
2322    XMesaVisual xmvis = (XMesaVisual) config;
2323
2324    if (!dpy || !config ||
2325        (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2326       return 0;
2327
2328    return create_context(dpy, xmvis,
2329                          shareCtx ? shareCtx->xmesaContext : NULL,
2330                          direct,
2331                          1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2332 }
2333
2334
2335 PUBLIC XVisualInfo *
2336 glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2337 {
2338    return glXGetVisualFromFBConfig(dpy, config);
2339 }
2340
2341
2342 PUBLIC GLXFBConfigSGIX
2343 glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2344 {
2345    XMesaVisual xmvis = find_glx_visual(dpy, vis);
2346    if (!xmvis) {
2347       /* This visual wasn't found with glXChooseVisual() */
2348       xmvis = create_glx_visual(dpy, vis);
2349    }
2350
2351    return (GLXFBConfigSGIX) xmvis;
2352 }
2353
2354
2355
2356 /*** GLX_SGIX_pbuffer ***/
2357
2358 PUBLIC GLXPbufferSGIX
2359 glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2360                         unsigned int width, unsigned int height,
2361                         int *attribList)
2362 {
2363    XMesaVisual xmvis = (XMesaVisual) config;
2364    XMesaBuffer xmbuf;
2365    const int *attrib;
2366    GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2367
2368    (void) dpy;
2369
2370    for (attrib = attribList; attrib && *attrib; attrib++) {
2371       switch (*attrib) {
2372          case GLX_PRESERVED_CONTENTS_SGIX:
2373             attrib++;
2374             preserveContents = *attrib; /* ignored */
2375             break;
2376          case GLX_LARGEST_PBUFFER_SGIX:
2377             attrib++;
2378             useLargest = *attrib; /* ignored */
2379             break;
2380          default:
2381             return 0;
2382       }
2383    }
2384
2385    /* not used at this time */
2386    (void) useLargest;
2387    (void) preserveContents;
2388
2389    xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2390    /* A GLXPbuffer handle must be an X Drawable because that's what
2391     * glXMakeCurrent takes.
2392     */
2393    return (GLXPbuffer) xmbuf->ws.drawable;
2394 }
2395
2396
2397 PUBLIC void
2398 glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2399 {
2400    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2401    if (xmbuf) {
2402       XMesaDestroyBuffer(xmbuf);
2403    }
2404 }
2405
2406
2407 PUBLIC int
2408 glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute,
2409                        unsigned int *value)
2410 {
2411    const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2412
2413    if (!xmbuf) {
2414       /* Generate GLXBadPbufferSGIX for bad pbuffer */
2415       return 0;
2416    }
2417
2418    switch (attribute) {
2419       case GLX_PRESERVED_CONTENTS_SGIX:
2420          *value = True;
2421          break;
2422       case GLX_LARGEST_PBUFFER_SGIX:
2423          *value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
2424          break;
2425       case GLX_WIDTH_SGIX:
2426          *value = xmesa_buffer_width(xmbuf);
2427          break;
2428       case GLX_HEIGHT_SGIX:
2429          *value = xmesa_buffer_height(xmbuf);
2430          break;
2431       case GLX_EVENT_MASK_SGIX:
2432          *value = 0;  /* XXX might be wrong */
2433          break;
2434       default:
2435          *value = 0;
2436    }
2437    return 0;
2438 }
2439
2440
2441 PUBLIC void
2442 glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2443 {
2444    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2445    if (xmbuf) {
2446       /* Note: we'll never generate clobber events */
2447       xmbuf->selectedEvents = mask;
2448    }
2449 }
2450
2451
2452 PUBLIC void
2453 glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable,
2454                         unsigned long *mask)
2455 {
2456    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2457    if (xmbuf) {
2458       *mask = xmbuf->selectedEvents;
2459    }
2460    else {
2461       *mask = 0;
2462    }
2463 }
2464
2465
2466
2467 /*** GLX_SGI_cushion ***/
2468
2469 PUBLIC void
2470 glXCushionSGI(Display *dpy, Window win, float cushion)
2471 {
2472    (void) dpy;
2473    (void) win;
2474    (void) cushion;
2475 }
2476
2477
2478
2479 /*** GLX_SGIX_video_resize ***/
2480
2481 PUBLIC int
2482 glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel,
2483                            Window window)
2484 {
2485    (void) dpy;
2486    (void) screen;
2487    (void) channel;
2488    (void) window;
2489    return 0;
2490 }
2491
2492 PUBLIC int
2493 glXChannelRectSGIX(Display *dpy, int screen, int channel,
2494                    int x, int y, int w, int h)
2495 {
2496    (void) dpy;
2497    (void) screen;
2498    (void) channel;
2499    (void) x;
2500    (void) y;
2501    (void) w;
2502    (void) h;
2503    return 0;
2504 }
2505
2506 PUBLIC int
2507 glXQueryChannelRectSGIX(Display *dpy, int screen, int channel,
2508                         int *x, int *y, int *w, int *h)
2509 {
2510    (void) dpy;
2511    (void) screen;
2512    (void) channel;
2513    (void) x;
2514    (void) y;
2515    (void) w;
2516    (void) h;
2517    return 0;
2518 }
2519
2520 PUBLIC int
2521 glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel,
2522                           int *dx, int *dy, int *dw, int *dh)
2523 {
2524    (void) dpy;
2525    (void) screen;
2526    (void) channel;
2527    (void) dx;
2528    (void) dy;
2529    (void) dw;
2530    (void) dh;
2531    return 0;
2532 }
2533
2534 PUBLIC int
2535 glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2536 {
2537    (void) dpy;
2538    (void) screen;
2539    (void) channel;
2540    (void) synctype;
2541    return 0;
2542 }
2543
2544
2545
2546 /*** GLX_SGIX_dmbuffer **/
2547
2548 #if defined(_DM_BUFFER_H_)
2549 PUBLIC Bool
2550 glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer,
2551                           DMparams *params, DMbuffer dmbuffer)
2552 {
2553    (void) dpy;
2554    (void) pbuffer;
2555    (void) params;
2556    (void) dmbuffer;
2557    return False;
2558 }
2559 #endif
2560
2561
2562 /*** GLX_SGIX_swap_group ***/
2563
2564 PUBLIC void
2565 glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2566 {
2567    (void) dpy;
2568    (void) drawable;
2569    (void) member;
2570 }
2571
2572
2573
2574 /*** GLX_SGIX_swap_barrier ***/
2575
2576 PUBLIC void
2577 glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2578 {
2579    (void) dpy;
2580    (void) drawable;
2581    (void) barrier;
2582 }
2583
2584 PUBLIC Bool
2585 glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2586 {
2587    (void) dpy;
2588    (void) screen;
2589    (void) max;
2590    return False;
2591 }
2592
2593
2594
2595 /*** GLX_SUN_get_transparent_index ***/
2596
2597 PUBLIC Status
2598 glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay,
2599                           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 }
2645
2646
2647
2648 /*** GLX_ARB_create_context ***/
2649
2650 GLXContext
2651 glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
2652                            GLXContext shareCtx, Bool direct,
2653                            const int *attrib_list)
2654 {
2655    XMesaVisual xmvis = (XMesaVisual) config;
2656    int majorVersion = 1, minorVersion = 0;
2657    int contextFlags = 0x0;
2658    int profileMask = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
2659    int renderType = GLX_RGBA_TYPE;
2660    unsigned i;
2661    Bool done = False;
2662    const int contextFlagsAll = (GLX_CONTEXT_DEBUG_BIT_ARB |
2663                                 GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB);
2664
2665    /* parse attrib_list */
2666    for (i = 0; !done && attrib_list[i]; i++) {
2667       switch (attrib_list[i]) {
2668       case GLX_CONTEXT_MAJOR_VERSION_ARB:
2669          majorVersion = attrib_list[++i];
2670          break;
2671       case GLX_CONTEXT_MINOR_VERSION_ARB:
2672          minorVersion = attrib_list[++i];
2673          break;
2674       case GLX_CONTEXT_FLAGS_ARB:
2675          contextFlags = attrib_list[++i];
2676          break;
2677       case GLX_CONTEXT_PROFILE_MASK_ARB:
2678          profileMask = attrib_list[++i];
2679          break;
2680       case GLX_RENDER_TYPE:
2681          renderType = attrib_list[++i];
2682          break;
2683       case 0:
2684          /* end of list */
2685          done = True;
2686          break;
2687       default:
2688          /* bad attribute */
2689          /* XXX generate BadValue X Error */
2690          return NULL;
2691       }
2692    }
2693
2694    /* check contextFlags */
2695    if (contextFlags & ~contextFlagsAll) {
2696       return NULL; /* generate BadValue X Error */
2697    }
2698
2699    /* check profileMask */
2700    if (profileMask != GLX_CONTEXT_CORE_PROFILE_BIT_ARB &&
2701        profileMask != GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) {
2702       return NULL; /* generate BadValue X Error */
2703    }
2704
2705    /* check version (generate BadMatch if bad) */
2706    switch (majorVersion) {
2707    case 1:
2708       if (minorVersion < 0 || minorVersion > 5)
2709          return NULL;
2710       break;
2711    case 2:
2712       if (minorVersion < 0 || minorVersion > 1)
2713          return NULL;
2714       break;
2715    case 3:
2716       if (minorVersion < 0 || minorVersion > 2)
2717          return NULL;
2718       break;
2719    case 4:
2720       if (minorVersion < 0 || minorVersion > 0)
2721          return NULL;
2722       break;
2723    default:
2724       return NULL;
2725    }
2726
2727    if ((contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
2728        majorVersion < 3)
2729       return NULL; /* generate GLXBadProfileARB */
2730
2731    if (renderType == GLX_COLOR_INDEX_TYPE && majorVersion >= 3)
2732       return NULL; /* generate BadMatch */
2733
2734    return create_context(dpy, xmvis,
2735                          shareCtx ? shareCtx->xmesaContext : NULL,
2736                          direct,
2737                          majorVersion, minorVersion,
2738                          profileMask, contextFlags);
2739 }