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 #include "main/context.h"
  38 #include "main/config.h"
  39 #include "main/macros.h"
  40 #include "main/imports.h"
  41 #include "main/version.h"
  42 #include "state_tracker/st_context.h"
  43 #include "state_tracker/st_public.h"
  44
  45
  46 /* This indicates the client-side GLX API and GLX encoder version. */
  47 #define CLIENT_MAJOR_VERSION 1
  48 #define CLIENT_MINOR_VERSION 4  /* but don't have 1.3's pbuffers, etc yet */
  49
  50 /* This indicates the server-side GLX decoder version.
  51  * GLX 1.4 indicates OpenGL 1.3 support
  52  */
  53 #define SERVER_MAJOR_VERSION 1
  54 #define SERVER_MINOR_VERSION 4
  55
  56 /* This is appended onto the glXGetClient/ServerString version strings. */
  57 #define MESA_GLX_VERSION "Mesa " MESA_VERSION_STRING
  58
  59 /* Who implemented this GLX? */
  60 #define VENDOR "Brian Paul"
  61
  62 #define EXTENSIONS \
  63    "GLX_MESA_copy_sub_buffer " \
  64    "GLX_MESA_pixmap_colormap " \
  65    "GLX_MESA_release_buffers " \
  66    "GLX_ARB_get_proc_address " \
  67    "GLX_EXT_texture_from_pixmap " \
  68    "GLX_EXT_visual_info " \
  69    "GLX_EXT_visual_rating " \
  70    /*"GLX_SGI_video_sync "*/ \
  71    "GLX_SGIX_fbconfig " \
  72    "GLX_SGIX_pbuffer "
  73
  74 #define DEFAULT_DIRECT GL_TRUE
  75
  76
  77
  78 /**
  79  * The GLXContext typedef is defined as a pointer to this structure.
  80  */
  81 struct __GLXcontextRec
  82 {
  83    Display *currentDpy;
  84    GLboolean isDirect;
  85    GLXDrawable currentDrawable;
  86    GLXDrawable currentReadable;
  87    XID xid;
  88
  89    XMesaContext xmesaContext;
  90 };
  91
  92
  93
  94 static pipe_tsd ContextTSD;
  95
  96 /** Set current context for calling thread */
  97 static void
  98 SetCurrentContext(GLXContext c)
  99 {
 100    pipe_tsd_set(&ContextTSD, c);
 101 }
 102
 103 /** Get current context for calling thread */
 104 static GLXContext
 105 GetCurrentContext(void)
 106 {
 107    return pipe_tsd_get(&ContextTSD);
 108 }
 109
 110
 111
 112 /**********************************************************************/
 113 /***                     Debug helper code                          ***/
 114 /**********************************************************************/
 115
 116 extern void _kw_ungrab_all( Display *dpy );
 117 void _kw_ungrab_all( Display *dpy )
 118 {
 119    XUngrabPointer( dpy, CurrentTime );
 120    XUngrabKeyboard( dpy, CurrentTime );
 121 }
 122
 123
 124
 125 /**********************************************************************/
 126 /***                       GLX Visual Code                          ***/
 127 /**********************************************************************/
 128
 129 #define DONT_CARE -1
 130
 131
 132 static XMesaVisual *VisualTable = NULL;
 133 static int NumVisuals = 0;
 134
 135
 136
 137 /* Macro to handle c_class vs class field name in XVisualInfo struct */
 138 #if defined(__cplusplus) || defined(c_plusplus)
 139 #define CLASS c_class
 140 #else
 141 #define CLASS class
 142 #endif
 143
 144
 145
 146 /*
 147  * Test if the given XVisualInfo is usable for Mesa rendering.
 148  */
 149 static GLboolean
 150 is_usable_visual( XVisualInfo *vinfo )
 151 {
 152    switch (vinfo->CLASS) {
 153       case StaticGray:
 154       case GrayScale:
 155          /* Any StaticGray/GrayScale visual works in RGB or CI mode */
 156          return GL_TRUE;
 157       case StaticColor:
 158       case PseudoColor:
 159          /* Any StaticColor/PseudoColor visual of at least 4 bits */
 160          if (vinfo->depth>=4) {
 161             return GL_TRUE;
 162          }
 163          else {
 164             return GL_FALSE;
 165          }
 166       case TrueColor:
 167       case DirectColor:
 168          /* Any depth of TrueColor or DirectColor works in RGB mode */
 169          return GL_TRUE;
 170       default:
 171          /* This should never happen */
 172          return GL_FALSE;
 173    }
 174 }
 175
 176
 177 /*
 178  * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
 179  * configuration in our list of GLX visuals.
 180  */
 181 static XMesaVisual
 182 save_glx_visual( Display *dpy, XVisualInfo *vinfo,
 183                  GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
 184                  GLboolean stereoFlag,
 185                  GLint depth_size, GLint stencil_size,
 186                  GLint accumRedSize, GLint accumGreenSize,
 187                  GLint accumBlueSize, GLint accumAlphaSize,
 188                  GLint level, GLint numAuxBuffers )
 189 {
 190    GLboolean ximageFlag = GL_TRUE;
 191    XMesaVisual xmvis;
 192    GLint i;
 193    GLboolean comparePointers;
 194
 195    if (dbFlag) {
 196       /* Check if the MESA_BACK_BUFFER env var is set */
 197       char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
 198       if (backbuffer) {
 199          if (backbuffer[0]=='p' || backbuffer[0]=='P') {
 200             ximageFlag = GL_FALSE;
 201          }
 202          else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
 203             ximageFlag = GL_TRUE;
 204          }
 205          else {
 206             _mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
 207          }
 208       }
 209    }
 210
 211    if (stereoFlag) {
 212       /* stereo not supported */
 213       return NULL;
 214    }
 215
 216    if (stencil_size > 0 && depth_size > 0)
 217       depth_size = 24;
 218
 219    /* Comparing IDs uses less memory but sometimes fails. */
 220    /* XXX revisit this after 3.0 is finished. */
 221    if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
 222       comparePointers = GL_TRUE;
 223    else
 224       comparePointers = GL_FALSE;
 225
 226    /* Force the visual to have an alpha channel */
 227    if (rgbFlag && _mesa_getenv("MESA_GLX_FORCE_ALPHA"))
 228       alphaFlag = GL_TRUE;
 229
 230    /* First check if a matching visual is already in the list */
 231    for (i=0; i<NumVisuals; i++) {
 232       XMesaVisual v = VisualTable[i];
 233       if (v->display == dpy
 234           && v->mesa_visual.level == level
 235           && v->mesa_visual.numAuxBuffers == numAuxBuffers
 236           && v->ximage_flag == ximageFlag
 237           && v->mesa_visual.rgbMode == rgbFlag
 238           && v->mesa_visual.doubleBufferMode == dbFlag
 239           && v->mesa_visual.stereoMode == stereoFlag
 240           && (v->mesa_visual.alphaBits > 0) == alphaFlag
 241           && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
 242           && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
 243           && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
 244           && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
 245           && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
 246           && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
 247          /* now either compare XVisualInfo pointers or visual IDs */
 248          if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
 249              || (comparePointers && v->vishandle == vinfo)) {
 250             return v;
 251          }
 252       }
 253    }
 254
 255    /* Create a new visual and add it to the list. */
 256
 257    xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
 258                               stereoFlag, ximageFlag,
 259                               depth_size, stencil_size,
 260                               accumRedSize, accumBlueSize,
 261                               accumBlueSize, accumAlphaSize, 0, level,
 262                               GLX_NONE_EXT );
 263    if (xmvis) {
 264       /* Save a copy of the pointer now so we can find this visual again
 265        * if we need to search for it in find_glx_visual().
 266        */
 267       xmvis->vishandle = vinfo;
 268       /* Allocate more space for additional visual */
 269       VisualTable = (XMesaVisual *) _mesa_realloc( VisualTable,
 270                                    sizeof(XMesaVisual) * NumVisuals,
 271                                    sizeof(XMesaVisual) * (NumVisuals + 1));
 272       /* add xmvis to the list */
 273       VisualTable[NumVisuals] = xmvis;
 274       NumVisuals++;
 275       /* XXX minor hack, because XMesaCreateVisual doesn't support an
 276        * aux buffers parameter.
 277        */
 278       xmvis->mesa_visual.numAuxBuffers = numAuxBuffers;
 279    }
 280    return xmvis;
 281 }
 282
 283
 284 /**
 285  * Return the default number of bits for the Z buffer.
 286  * If defined, use the MESA_GLX_DEPTH_BITS env var value.
 287  * Otherwise, use the DEFAULT_SOFTWARE_DEPTH_BITS constant.
 288  * XXX probably do the same thing for stencil, accum, etc.
 289  */
 290 static GLint
 291 default_depth_bits(void)
 292 {
 293    int zBits;
 294    const char *zEnv = _mesa_getenv("MESA_GLX_DEPTH_BITS");
 295    if (zEnv)
 296       zBits = _mesa_atoi(zEnv);
 297    else
 298       zBits = DEFAULT_SOFTWARE_DEPTH_BITS;
 299    return zBits;
 300 }
 301
 302 static GLint
 303 default_alpha_bits(void)
 304 {
 305    int aBits;
 306    const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS");
 307    if (aEnv)
 308       aBits = _mesa_atoi(aEnv);
 309    else
 310       aBits = 0;
 311    return aBits;
 312 }
 313
 314 static GLint
 315 default_accum_bits(void)
 316 {
 317    return 16;
 318 }
 319
 320
 321
 322 /*
 323  * Create a GLX visual from a regular XVisualInfo.
 324  * This is called when Fake GLX is given an XVisualInfo which wasn't
 325  * returned by glXChooseVisual.  Since this is the first time we're
 326  * considering this visual we'll take a guess at reasonable values
 327  * for depth buffer size, stencil size, accum size, etc.
 328  * This is the best we can do with a client-side emulation of GLX.
 329  */
 330 static XMesaVisual
 331 create_glx_visual( Display *dpy, XVisualInfo *visinfo )
 332 {
 333    GLint zBits = default_depth_bits();
 334    GLint accBits = default_accum_bits();
 335    GLboolean alphaFlag = default_alpha_bits() > 0;
 336
 337    if (is_usable_visual( visinfo )) {
 338       /* Configure this visual as RGB, double-buffered, depth-buffered. */
 339       /* This is surely wrong for some people's needs but what else */
 340       /* can be done?  They should use glXChooseVisual(). */
 341       return save_glx_visual( dpy, visinfo,
 342                               GL_TRUE,   /* rgb */
 343                               alphaFlag, /* alpha */
 344                               GL_TRUE,   /* double */
 345                               GL_FALSE,  /* stereo */
 346                               zBits,
 347                               STENCIL_BITS,
 348                               accBits, /* r */
 349                               accBits, /* g */
 350                               accBits, /* b */
 351                               accBits, /* a */
 352                               0,         /* level */
 353                               0          /* numAux */
 354          );
 355    }
 356    else {
 357       _mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
 358       return NULL;
 359    }
 360 }
 361
 362
 363
 364 /*
 365  * Find the GLX visual associated with an XVisualInfo.
 366  */
 367 static XMesaVisual
 368 find_glx_visual( Display *dpy, XVisualInfo *vinfo )
 369 {
 370    int i;
 371
 372    /* try to match visual id */
 373    for (i=0;i<NumVisuals;i++) {
 374       if (VisualTable[i]->display==dpy
 375           && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
 376          return VisualTable[i];
 377       }
 378    }
 379
 380    /* if that fails, try to match pointers */
 381    for (i=0;i<NumVisuals;i++) {
 382       if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
 383          return VisualTable[i];
 384       }
 385    }
 386
 387    return NULL;
 388 }
 389
 390
 391 /**
 392  * Try to get an X visual which matches the given arguments.
 393  */
 394 static XVisualInfo *
 395 get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
 396 {
 397    XVisualInfo temp, *vis;
 398    long mask;
 399    int n;
 400    unsigned int default_depth;
 401    int default_class;
 402
 403    mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
 404    temp.screen = scr;
 405    temp.depth = depth;
 406    temp.CLASS = xclass;
 407
 408    default_depth = DefaultDepth(dpy,scr);
 409    default_class = DefaultVisual(dpy,scr)->CLASS;
 410
 411    if (depth==default_depth && xclass==default_class) {
 412       /* try to get root window's visual */
 413       temp.visualid = DefaultVisual(dpy,scr)->visualid;
 414       mask |= VisualIDMask;
 415    }
 416
 417    vis = XGetVisualInfo( dpy, mask, &temp, &n );
 418
 419    /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
 420     * An SGI Infinite Reality system, for example, can have 30bpp pixels:
 421     * 10 bits per color channel.  Mesa's limited to a max of 8 bits/channel.
 422     */
 423    if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
 424       if (_mesa_bitcount((GLuint) vis->red_mask  ) <= 8 &&
 425           _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
 426           _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
 427          return vis;
 428       }
 429       else {
 430          XFree((void *) vis);
 431          return NULL;
 432       }
 433    }
 434
 435    return vis;
 436 }
 437
 438
 439 /*
 440  * Retrieve the value of the given environment variable and find
 441  * the X visual which matches it.
 442  * Input:  dpy - the display
 443  *         screen - the screen number
 444  *         varname - the name of the environment variable
 445  * Return:  an XVisualInfo pointer to NULL if error.
 446  */
 447 static XVisualInfo *
 448 get_env_visual(Display *dpy, int scr, const char *varname)
 449 {
 450    char value[100], type[100];
 451    int depth, xclass = -1;
 452    XVisualInfo *vis;
 453
 454    if (!_mesa_getenv( varname )) {
 455       return NULL;
 456    }
 457
 458    _mesa_strncpy( value, _mesa_getenv(varname), 100 );
 459    value[99] = 0;
 460
 461    sscanf( value, "%s %d", type, &depth );
 462
 463    if (_mesa_strcmp(type,"TrueColor")==0)          xclass = TrueColor;
 464    else if (_mesa_strcmp(type,"DirectColor")==0)   xclass = DirectColor;
 465    else if (_mesa_strcmp(type,"PseudoColor")==0)   xclass = PseudoColor;
 466    else if (_mesa_strcmp(type,"StaticColor")==0)   xclass = StaticColor;
 467    else if (_mesa_strcmp(type,"GrayScale")==0)     xclass = GrayScale;
 468    else if (_mesa_strcmp(type,"StaticGray")==0)    xclass = StaticGray;
 469
 470    if (xclass>-1 && depth>0) {
 471       vis = get_visual( dpy, scr, depth, xclass );
 472       if (vis) {
 473          return vis;
 474       }
 475    }
 476
 477    _mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
 478                  type, depth);
 479
 480    return NULL;
 481 }
 482
 483
 484
 485 /*
 486  * Select an X visual which satisfies the RGBA flag and minimum depth.
 487  * Input:  dpy,
 488  *         screen - X display and screen number
 489  *         min_depth - minimum visual depth
 490  *         preferred_class - preferred GLX visual class or DONT_CARE
 491  * Return:  pointer to an XVisualInfo or NULL.
 492  */
 493 static XVisualInfo *
 494 choose_x_visual( Display *dpy, int screen, int min_depth,
 495                  int preferred_class )
 496 {
 497    XVisualInfo *vis;
 498    int xclass, visclass = 0;
 499    int depth;
 500
 501    /* First see if the MESA_RGB_VISUAL env var is defined */
 502    vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
 503    if (vis) {
 504       return vis;
 505    }
 506    /* Otherwise, search for a suitable visual */
 507    if (preferred_class==DONT_CARE) {
 508       for (xclass=0;xclass<6;xclass++) {
 509          switch (xclass) {
 510          case 0:  visclass = TrueColor;    break;
 511          case 1:  visclass = DirectColor;  break;
 512          case 2:  visclass = PseudoColor;  break;
 513          case 3:  visclass = StaticColor;  break;
 514          case 4:  visclass = GrayScale;    break;
 515          case 5:  visclass = StaticGray;   break;
 516          }
 517          if (min_depth==0) {
 518             /* start with shallowest */
 519             for (depth=0;depth<=32;depth++) {
 520                if (visclass==TrueColor && depth==8) {
 521                   /* Special case:  try to get 8-bit PseudoColor before */
 522                   /* 8-bit TrueColor */
 523                   vis = get_visual( dpy, screen, 8, PseudoColor );
 524                   if (vis) {
 525                      return vis;
 526                   }
 527                }
 528                vis = get_visual( dpy, screen, depth, visclass );
 529                if (vis) {
 530                   return vis;
 531                }
 532             }
 533          }
 534          else {
 535             /* start with deepest */
 536             for (depth=32;depth>=min_depth;depth--) {
 537                if (visclass==TrueColor && depth==8) {
 538                   /* Special case:  try to get 8-bit PseudoColor before */
 539                   /* 8-bit TrueColor */
 540                   vis = get_visual( dpy, screen, 8, PseudoColor );
 541                   if (vis) {
 542                      return vis;
 543                   }
 544                }
 545                vis = get_visual( dpy, screen, depth, visclass );
 546                if (vis) {
 547                   return vis;
 548                }
 549             }
 550          }
 551       }
 552    }
 553    else {
 554       /* search for a specific visual class */
 555       switch (preferred_class) {
 556       case GLX_TRUE_COLOR_EXT:    visclass = TrueColor;    break;
 557       case GLX_DIRECT_COLOR_EXT:  visclass = DirectColor;  break;
 558       case GLX_PSEUDO_COLOR_EXT:  visclass = PseudoColor;  break;
 559       case GLX_STATIC_COLOR_EXT:  visclass = StaticColor;  break;
 560       case GLX_GRAY_SCALE_EXT:    visclass = GrayScale;    break;
 561       case GLX_STATIC_GRAY_EXT:   visclass = StaticGray;   break;
 562       default:   return NULL;
 563       }
 564       if (min_depth==0) {
 565          /* start with shallowest */
 566          for (depth=0;depth<=32;depth++) {
 567             vis = get_visual( dpy, screen, depth, visclass );
 568             if (vis) {
 569                return vis;
 570             }
 571          }
 572       }
 573       else {
 574          /* start with deepest */
 575          for (depth=32;depth>=min_depth;depth--) {
 576             vis = get_visual( dpy, screen, depth, visclass );
 577             if (vis) {
 578                return vis;
 579             }
 580          }
 581       }
 582    }
 583
 584    /* didn't find a visual */
 585    return NULL;
 586 }
 587
 588
 589
 590
 591 /**********************************************************************/
 592 /***             Display-related functions                          ***/
 593 /**********************************************************************/
 594
 595
 596 /**
 597  * Free all XMesaVisuals which are associated with the given display.
 598  */
 599 static void
 600 destroy_visuals_on_display(Display *dpy)
 601 {
 602    int i;
 603    for (i = 0; i < NumVisuals; i++) {
 604       if (VisualTable[i]->display == dpy) {
 605          /* remove this visual */
 606          int j;
 607          free(VisualTable[i]);
 608          for (j = i; j < NumVisuals - 1; j++)
 609             VisualTable[j] = VisualTable[j + 1];
 610          NumVisuals--;
 611       }
 612    }
 613 }
 614
 615
 616 /**
 617  * Called from XCloseDisplay() to let us free our display-related data.
 618  */
 619 static int
 620 close_display_callback(Display *dpy, XExtCodes *codes)
 621 {
 622    destroy_visuals_on_display(dpy);
 623    xmesa_destroy_buffers_on_display(dpy);
 624    return 0;
 625 }
 626
 627
 628 /**
 629  * Look for the named extension on given display and return a pointer
 630  * to the _XExtension data, or NULL if extension not found.
 631  */
 632 static _XExtension *
 633 lookup_extension(Display *dpy, const char *extName)
 634 {
 635    _XExtension *ext;
 636    for (ext = dpy->ext_procs; ext; ext = ext->next) {
 637       if (ext->name && strcmp(ext->name, extName) == 0) {
 638          return ext;
 639       }
 640    }
 641    return NULL;
 642 }
 643
 644
 645 /**
 646  * Whenever we're given a new Display pointer, call this function to
 647  * register our close_display_callback function.
 648  */
 649 static void
 650 register_with_display(Display *dpy)
 651 {
 652    const char *extName = "MesaGLX";
 653    _XExtension *ext;
 654
 655    ext = lookup_extension(dpy, extName);
 656    if (!ext) {
 657       XExtCodes *c = XAddExtension(dpy);
 658       ext = dpy->ext_procs;  /* new extension is at head of list */
 659       assert(c->extension == ext->codes.extension);
 660       ext->name = _mesa_strdup(extName);
 661       ext->close_display = close_display_callback;
 662    }
 663 }
 664
 665
 666 /**********************************************************************/
 667 /***                  Begin Fake GLX API Functions                  ***/
 668 /**********************************************************************/
 669
 670
 671 /**
 672  * Helper used by glXChooseVisual and glXChooseFBConfig.
 673  * The fbConfig parameter must be GL_FALSE for the former and GL_TRUE for
 674  * the later.
 675  * In either case, the attribute list is terminated with the value 'None'.
 676  */
 677 static XMesaVisual
 678 choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig )
 679 {
 680    const GLboolean rgbModeDefault = fbConfig;
 681    const int *parselist;
 682    XVisualInfo *vis;
 683    int min_ci = 0;
 684    int min_red=0, min_green=0, min_blue=0;
 685    GLboolean rgb_flag = rgbModeDefault;
 686    GLboolean alpha_flag = GL_FALSE;
 687    GLboolean double_flag = GL_FALSE;
 688    GLboolean stereo_flag = GL_FALSE;
 689    GLint depth_size = 0;
 690    GLint stencil_size = 0;
 691    GLint accumRedSize = 0;
 692    GLint accumGreenSize = 0;
 693    GLint accumBlueSize = 0;
 694    GLint accumAlphaSize = 0;
 695    int level = 0;
 696    int visual_type = DONT_CARE;
 697    int trans_type = DONT_CARE;
 698    int trans_value = DONT_CARE;
 699    GLint caveat = DONT_CARE;
 700    XMesaVisual xmvis = NULL;
 701    int desiredVisualID = -1;
 702    int numAux = 0;
 703
 704    parselist = list;
 705
 706    while (*parselist) {
 707
 708       switch (*parselist) {
 709          case GLX_USE_GL:
 710             if (fbConfig) {
 711                /* invalid token */
 712                return NULL;
 713             }
 714             else {
 715                /* skip */
 716                parselist++;
 717             }
 718             break;
 719          case GLX_BUFFER_SIZE:
 720             parselist++;
 721             min_ci = *parselist++;
 722             break;
 723          case GLX_LEVEL:
 724             parselist++;
 725             level = *parselist++;
 726             break;
 727          case GLX_RGBA:
 728             if (fbConfig) {
 729                /* invalid token */
 730                return NULL;
 731             }
 732             else {
 733                rgb_flag = GL_TRUE;
 734                parselist++;
 735             }
 736             break;
 737          case GLX_DOUBLEBUFFER:
 738             parselist++;
 739             if (fbConfig) {
 740                double_flag = *parselist++;
 741             }
 742             else {
 743                double_flag = GL_TRUE;
 744             }
 745             break;
 746          case GLX_STEREO:
 747             parselist++;
 748             if (fbConfig) {
 749                stereo_flag = *parselist++;
 750             }
 751             else {
 752                stereo_flag = GL_TRUE;
 753             }
 754             break;
 755          case GLX_AUX_BUFFERS:
 756             parselist++;
 757             numAux = *parselist++;
 758             if (numAux > MAX_AUX_BUFFERS)
 759                return NULL;
 760             break;
 761          case GLX_RED_SIZE:
 762             parselist++;
 763             min_red = *parselist++;
 764             break;
 765          case GLX_GREEN_SIZE:
 766             parselist++;
 767             min_green = *parselist++;
 768             break;
 769          case GLX_BLUE_SIZE:
 770             parselist++;
 771             min_blue = *parselist++;
 772             break;
 773          case GLX_ALPHA_SIZE:
 774             parselist++;
 775             {
 776                GLint size = *parselist++;
 777                alpha_flag = size ? GL_TRUE : GL_FALSE;
 778             }
 779             break;
 780          case GLX_DEPTH_SIZE:
 781             parselist++;
 782             depth_size = *parselist++;
 783             break;
 784          case GLX_STENCIL_SIZE:
 785             parselist++;
 786             stencil_size = *parselist++;
 787             break;
 788          case GLX_ACCUM_RED_SIZE:
 789             parselist++;
 790             {
 791                GLint size = *parselist++;
 792                accumRedSize = MAX2( accumRedSize, size );
 793             }
 794             break;
 795          case GLX_ACCUM_GREEN_SIZE:
 796             parselist++;
 797             {
 798                GLint size = *parselist++;
 799                accumGreenSize = MAX2( accumGreenSize, size );
 800             }
 801             break;
 802          case GLX_ACCUM_BLUE_SIZE:
 803             parselist++;
 804             {
 805                GLint size = *parselist++;
 806                accumBlueSize = MAX2( accumBlueSize, size );
 807             }
 808             break;
 809          case GLX_ACCUM_ALPHA_SIZE:
 810             parselist++;
 811             {
 812                GLint size = *parselist++;
 813                accumAlphaSize = MAX2( accumAlphaSize, size );
 814             }
 815             break;
 816
 817          /*
 818           * GLX_EXT_visual_info extension
 819           */
 820          case GLX_X_VISUAL_TYPE_EXT:
 821             parselist++;
 822             visual_type = *parselist++;
 823             break;
 824          case GLX_TRANSPARENT_TYPE_EXT:
 825             parselist++;
 826             trans_type = *parselist++;
 827             break;
 828          case GLX_TRANSPARENT_INDEX_VALUE_EXT:
 829             parselist++;
 830             trans_value = *parselist++;
 831             break;
 832          case GLX_TRANSPARENT_RED_VALUE_EXT:
 833          case GLX_TRANSPARENT_GREEN_VALUE_EXT:
 834          case GLX_TRANSPARENT_BLUE_VALUE_EXT:
 835          case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
 836             /* ignore */
 837             parselist++;
 838             parselist++;
 839             break;
 840
 841          /*
 842           * GLX_EXT_visual_info extension
 843           */
 844          case GLX_VISUAL_CAVEAT_EXT:
 845             parselist++;
 846             caveat = *parselist++; /* ignored for now */
 847             break;
 848
 849          /*
 850           * GLX_ARB_multisample
 851           */
 852          case GLX_SAMPLE_BUFFERS_ARB:
 853             /* ms not supported */
 854             return NULL;
 855          case GLX_SAMPLES_ARB:
 856             /* ms not supported */
 857             return NULL;
 858
 859          /*
 860           * FBConfig attribs.
 861           */
 862          case GLX_RENDER_TYPE:
 863             if (!fbConfig)
 864                return NULL;
 865             parselist++;
 866             if (*parselist == GLX_RGBA_BIT) {
 867                rgb_flag = GL_TRUE;
 868             }
 869             else if (*parselist == GLX_COLOR_INDEX_BIT) {
 870                rgb_flag = GL_FALSE;
 871             }
 872             else if (*parselist == 0) {
 873                rgb_flag = GL_TRUE;
 874             }
 875             parselist++;
 876             break;
 877          case GLX_DRAWABLE_TYPE:
 878             if (!fbConfig)
 879                return NULL;
 880             parselist++;
 881             if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
 882                return NULL; /* bad bit */
 883             }
 884             parselist++;
 885             break;
 886          case GLX_FBCONFIG_ID:
 887             if (!fbConfig)
 888                return NULL;
 889             parselist++;
 890             desiredVisualID = *parselist++;
 891             break;
 892          case GLX_X_RENDERABLE:
 893             if (!fbConfig)
 894                return NULL;
 895             parselist += 2;
 896             /* ignore */
 897             break;
 898
 899 #ifdef GLX_EXT_texture_from_pixmap
 900          case GLX_BIND_TO_TEXTURE_RGB_EXT:
 901             parselist++; /*skip*/
 902             break;
 903          case GLX_BIND_TO_TEXTURE_RGBA_EXT:
 904             parselist++; /*skip*/
 905             break;
 906          case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
 907             parselist++; /*skip*/
 908             break;
 909          case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
 910             parselist++;
 911             if (*parselist & ~(GLX_TEXTURE_1D_BIT_EXT |
 912                                GLX_TEXTURE_2D_BIT_EXT |
 913                                GLX_TEXTURE_RECTANGLE_BIT_EXT)) {
 914                /* invalid bit */
 915                return NULL;
 916             }
 917             break;
 918          case GLX_Y_INVERTED_EXT:
 919             parselist++; /*skip*/
 920             break;
 921 #endif
 922
 923          case None:
 924             /* end of list */
 925             break;
 926
 927          default:
 928             /* undefined attribute */
 929             _mesa_warning(NULL, "unexpected attrib 0x%x in choose_visual()",
 930                           *parselist);
 931             return NULL;
 932       }
 933    }
 934
 935    (void) caveat;
 936
 937
 938    /*
 939     * Since we're only simulating the GLX extension this function will never
 940     * find any real GL visuals.  Instead, all we can do is try to find an RGB
 941     * or CI visual of appropriate depth.  Other requested attributes such as
 942     * double buffering, depth buffer, etc. will be associated with the X
 943     * visual and stored in the VisualTable[].
 944     */
 945    if (desiredVisualID != -1) {
 946       /* try to get a specific visual, by visualID */
 947       XVisualInfo temp;
 948       int n;
 949       temp.visualid = desiredVisualID;
 950       temp.screen = screen;
 951       vis = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask, &temp, &n);
 952       if (vis) {
 953          /* give the visual some useful GLX attributes */
 954          double_flag = GL_TRUE;
 955          rgb_flag = GL_TRUE;
 956          depth_size = default_depth_bits();
 957          stencil_size = STENCIL_BITS;
 958          /* XXX accum??? */
 959       }
 960    }
 961    else if (level==0) {
 962       /* normal color planes */
 963       /* Get an RGB visual */
 964       int min_rgb = min_red + min_green + min_blue;
 965       if (min_rgb>1 && min_rgb<8) {
 966          /* a special case to be sure we can get a monochrome visual */
 967          min_rgb = 1;
 968       }
 969       vis = choose_x_visual( dpy, screen, min_rgb, visual_type );
 970    }
 971    else {
 972       _mesa_warning(NULL, "overlay not supported");
 973       return NULL;
 974    }
 975
 976    if (vis) {
 977       /* Note: we're not exactly obeying the glXChooseVisual rules here.
 978        * When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
 979        * largest depth buffer size, which is 32bits/value.  Instead, we
 980        * return 16 to maintain performance with earlier versions of Mesa.
 981        */
 982       if (stencil_size > 0)
 983          depth_size = 24;  /* if Z and stencil, always use 24+8 format */
 984       else if (depth_size > 24)
 985          depth_size = 32;
 986       else if (depth_size > 16)
 987          depth_size = 24;
 988       else if (depth_size > 0) {
 989          depth_size = default_depth_bits();
 990       }
 991
 992       if (!alpha_flag) {
 993          alpha_flag = default_alpha_bits() > 0;
 994       }
 995
 996       /* we only support one size of stencil and accum buffers. */
 997       if (stencil_size > 0)
 998          stencil_size = STENCIL_BITS;
 999
1000       if (accumRedSize > 0 ||
1001           accumGreenSize > 0 ||
1002           accumBlueSize > 0 ||
1003           accumAlphaSize > 0) {
1004
1005          accumRedSize =
1006             accumGreenSize =
1007             accumBlueSize = default_accum_bits();
1008
1009          accumAlphaSize = alpha_flag ? accumRedSize : 0;
1010       }
1011
1012       xmvis = save_glx_visual( dpy, vis, rgb_flag, alpha_flag, double_flag,
1013                                stereo_flag, depth_size, stencil_size,
1014                                accumRedSize, accumGreenSize,
1015                                accumBlueSize, accumAlphaSize, level, numAux );
1016    }
1017
1018    return xmvis;
1019 }
1020
1021
1022 XVisualInfo *
1023 glXChooseVisual( Display *dpy, int screen, int *list )
1024 {
1025    XMesaVisual xmvis;
1026
1027    /* register ourselves as an extension on this display */
1028    register_with_display(dpy);
1029
1030    xmvis = choose_visual(dpy, screen, list, GL_FALSE);
1031    if (xmvis) {
1032       /* create a new vishandle - the cached one may be stale */
1033       xmvis->vishandle = (XVisualInfo *) _mesa_malloc(sizeof(XVisualInfo));
1034       if (xmvis->vishandle) {
1035          _mesa_memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1036       }
1037       return xmvis->vishandle;
1038    }
1039    else
1040       return NULL;
1041 }
1042
1043
1044 GLXContext
1045 glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1046                   GLXContext share_list, Bool direct )
1047 {
1048    XMesaVisual xmvis;
1049    GLXContext glxCtx;
1050    GLXContext shareCtx = share_list;
1051
1052    if (!dpy || !visinfo)
1053       return 0;
1054
1055    glxCtx = CALLOC_STRUCT(__GLXcontextRec);
1056    if (!glxCtx)
1057       return 0;
1058
1059    /* deallocate unused windows/buffers */
1060 #if 0
1061    XMesaGarbageCollect();
1062 #endif
1063
1064    xmvis = find_glx_visual( dpy, visinfo );
1065    if (!xmvis) {
1066       /* This visual wasn't found with glXChooseVisual() */
1067       xmvis = create_glx_visual( dpy, visinfo );
1068       if (!xmvis) {
1069          /* unusable visual */
1070          _mesa_free(glxCtx);
1071          return NULL;
1072       }
1073    }
1074
1075    glxCtx->xmesaContext = XMesaCreateContext(xmvis,
1076                                    shareCtx ? shareCtx->xmesaContext : NULL);
1077    if (!glxCtx->xmesaContext) {
1078       _mesa_free(glxCtx);
1079       return NULL;
1080    }
1081
1082    glxCtx->isDirect = DEFAULT_DIRECT;
1083    glxCtx->currentDpy = dpy;
1084    glxCtx->xid = (XID) glxCtx;  /* self pointer */
1085
1086    return glxCtx;
1087 }
1088
1089
1090 /* XXX these may have to be removed due to thread-safety issues. */
1091 static GLXContext MakeCurrent_PrevContext = 0;
1092 static GLXDrawable MakeCurrent_PrevDrawable = 0;
1093 static GLXDrawable MakeCurrent_PrevReadable = 0;
1094 static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1095 static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1096
1097
1098 /* GLX 1.3 and later */
1099 Bool
1100 glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1101                        GLXDrawable read, GLXContext ctx )
1102 {
1103    GLXContext glxCtx = ctx;
1104    static boolean firsttime = 1, no_rast = 0;
1105
1106    if (firsttime) {
1107       no_rast = getenv("SP_NO_RAST") != NULL;
1108       firsttime = 0;
1109    }
1110
1111    if (ctx && draw && read) {
1112       XMesaBuffer drawBuffer, readBuffer;
1113       XMesaContext xmctx = glxCtx->xmesaContext;
1114
1115       /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1116       if (ctx == MakeCurrent_PrevContext
1117           && draw == MakeCurrent_PrevDrawable) {
1118          drawBuffer = MakeCurrent_PrevDrawBuffer;
1119       }
1120       else {
1121          drawBuffer = XMesaFindBuffer( dpy, draw );
1122       }
1123       if (!drawBuffer) {
1124          /* drawable must be a new window! */
1125          drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1126          if (!drawBuffer) {
1127             /* Out of memory, or context/drawable depth mismatch */
1128             return False;
1129          }
1130       }
1131
1132       /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1133       if (ctx == MakeCurrent_PrevContext
1134           && read == MakeCurrent_PrevReadable) {
1135          readBuffer = MakeCurrent_PrevReadBuffer;
1136       }
1137       else {
1138          readBuffer = XMesaFindBuffer( dpy, read );
1139       }
1140       if (!readBuffer) {
1141          /* drawable must be a new window! */
1142          readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1143          if (!readBuffer) {
1144             /* Out of memory, or context/drawable depth mismatch */
1145             return False;
1146          }
1147       }
1148
1149       if (no_rast &&
1150           MakeCurrent_PrevContext == ctx &&
1151           MakeCurrent_PrevDrawable == draw &&
1152           MakeCurrent_PrevReadable == read &&
1153           MakeCurrent_PrevDrawBuffer == drawBuffer &&
1154           MakeCurrent_PrevReadBuffer == readBuffer)
1155          return True;
1156
1157       MakeCurrent_PrevContext = ctx;
1158       MakeCurrent_PrevDrawable = draw;
1159       MakeCurrent_PrevReadable = read;
1160       MakeCurrent_PrevDrawBuffer = drawBuffer;
1161       MakeCurrent_PrevReadBuffer = readBuffer;
1162
1163       /* Now make current! */
1164       if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1165          ctx->currentDpy = dpy;
1166          ctx->currentDrawable = draw;
1167          ctx->currentReadable = read;
1168          SetCurrentContext(ctx);
1169          return True;
1170       }
1171       else {
1172          return False;
1173       }
1174    }
1175    else if (!ctx && !draw && !read) {
1176       /* release current context w/out assigning new one. */
1177       XMesaMakeCurrent2( NULL, NULL, NULL );
1178       MakeCurrent_PrevContext = 0;
1179       MakeCurrent_PrevDrawable = 0;
1180       MakeCurrent_PrevReadable = 0;
1181       MakeCurrent_PrevDrawBuffer = 0;
1182       MakeCurrent_PrevReadBuffer = 0;
1183       SetCurrentContext(NULL);
1184       return True;
1185    }
1186    else {
1187       /* The args must either all be non-zero or all zero.
1188        * This is an error.
1189        */
1190       return False;
1191    }
1192 }
1193
1194
1195 Bool
1196 glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1197 {
1198    return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1199 }
1200
1201
1202 GLXContext
1203 glXGetCurrentContext(void)
1204 {
1205    return GetCurrentContext();
1206 }
1207
1208
1209 Display *
1210 glXGetCurrentDisplay(void)
1211 {
1212    GLXContext glxCtx = glXGetCurrentContext();
1213
1214    return glxCtx ? glxCtx->currentDpy : NULL;
1215 }
1216
1217
1218 Display *
1219 glXGetCurrentDisplayEXT(void)
1220 {
1221    return glXGetCurrentDisplay();
1222 }
1223
1224
1225 GLXDrawable
1226 glXGetCurrentDrawable(void)
1227 {
1228    GLXContext gc = glXGetCurrentContext();
1229    return gc ? gc->currentDrawable : 0;
1230 }
1231
1232
1233 GLXDrawable
1234 glXGetCurrentReadDrawable(void)
1235 {
1236    GLXContext gc = glXGetCurrentContext();
1237    return gc ? gc->currentReadable : 0;
1238 }
1239
1240
1241 GLXDrawable
1242 glXGetCurrentReadDrawableSGI(void)
1243 {
1244    return glXGetCurrentReadDrawable();
1245 }
1246
1247
1248 GLXPixmap
1249 glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1250 {
1251    XMesaVisual v;
1252    XMesaBuffer b;
1253
1254    v = find_glx_visual( dpy, visinfo );
1255    if (!v) {
1256       v = create_glx_visual( dpy, visinfo );
1257       if (!v) {
1258          /* unusable visual */
1259          return 0;
1260       }
1261    }
1262
1263    b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1264    if (!b) {
1265       return 0;
1266    }
1267    return b->drawable;
1268 }
1269
1270
1271 /*** GLX_MESA_pixmap_colormap ***/
1272
1273 GLXPixmap
1274 glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1275                         Pixmap pixmap, Colormap cmap )
1276 {
1277    XMesaVisual v;
1278    XMesaBuffer b;
1279
1280    v = find_glx_visual( dpy, visinfo );
1281    if (!v) {
1282       v = create_glx_visual( dpy, visinfo );
1283       if (!v) {
1284          /* unusable visual */
1285          return 0;
1286       }
1287    }
1288
1289    b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1290    if (!b) {
1291       return 0;
1292    }
1293    return b->drawable;
1294 }
1295
1296
1297 void
1298 glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1299 {
1300    XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1301    if (b) {
1302       XMesaDestroyBuffer(b);
1303    }
1304    else if (_mesa_getenv("MESA_DEBUG")) {
1305       _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1306    }
1307 }
1308
1309
1310 void
1311 glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1312                 unsigned long mask )
1313 {
1314    GLXContext fakeSrc = src;
1315    GLXContext fakeDst = dst;
1316    XMesaContext xm_src = fakeSrc->xmesaContext;
1317    XMesaContext xm_dst = fakeDst->xmesaContext;
1318    (void) dpy;
1319    if (MakeCurrent_PrevContext == src) {
1320       _mesa_Flush();
1321    }
1322    st_copy_context_state( xm_src->st, xm_dst->st, (GLuint) mask );
1323 }
1324
1325
1326 Bool
1327 glXQueryExtension( Display *dpy, int *errorb, int *event )
1328 {
1329    /* Mesa's GLX isn't really an X extension but we try to act like one. */
1330    (void) dpy;
1331    (void) errorb;
1332    (void) event;
1333    return True;
1334 }
1335
1336
1337 void
1338 glXDestroyContext( Display *dpy, GLXContext ctx )
1339 {
1340    GLXContext glxCtx = ctx;
1341    (void) dpy;
1342    MakeCurrent_PrevContext = 0;
1343    MakeCurrent_PrevDrawable = 0;
1344    MakeCurrent_PrevReadable = 0;
1345    MakeCurrent_PrevDrawBuffer = 0;
1346    MakeCurrent_PrevReadBuffer = 0;
1347    XMesaDestroyContext( glxCtx->xmesaContext );
1348    XMesaGarbageCollect();
1349    _mesa_free(glxCtx);
1350 }
1351
1352
1353 Bool
1354 glXIsDirect( Display *dpy, GLXContext ctx )
1355 {
1356    GLXContext glxCtx = ctx;
1357    (void) ctx;
1358    return glxCtx->isDirect;
1359 }
1360
1361
1362
1363 void
1364 glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1365 {
1366    XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1367    static boolean firsttime = 1, no_rast = 0;
1368
1369    if (firsttime) {
1370       no_rast = getenv("SP_NO_RAST") != NULL;
1371       firsttime = 0;
1372    }
1373
1374    if (no_rast)
1375       return;
1376
1377    if (buffer) {
1378       XMesaSwapBuffers(buffer);
1379    }
1380    else if (_mesa_getenv("MESA_DEBUG")) {
1381       _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1382                     (int) drawable);
1383    }
1384 }
1385
1386
1387
1388 /*** GLX_MESA_copy_sub_buffer ***/
1389
1390 void
1391 glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
1392                            int x, int y, int width, int height )
1393 {
1394    XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1395    if (buffer) {
1396       XMesaCopySubBuffer(buffer, x, y, width, height);
1397    }
1398    else if (_mesa_getenv("MESA_DEBUG")) {
1399       _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1400    }
1401 }
1402
1403
1404 Bool
1405 glXQueryVersion( Display *dpy, int *maj, int *min )
1406 {
1407    (void) dpy;
1408    /* Return GLX version, not Mesa version */
1409    assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1410    *maj = CLIENT_MAJOR_VERSION;
1411    *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1412    return True;
1413 }
1414
1415
1416 /*
1417  * Query the GLX attributes of the given XVisualInfo.
1418  */
1419 static int
1420 get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1421 {
1422    ASSERT(xmvis);
1423    switch(attrib) {
1424       case GLX_USE_GL:
1425          if (fbconfig)
1426             return GLX_BAD_ATTRIBUTE;
1427          *value = (int) True;
1428          return 0;
1429       case GLX_BUFFER_SIZE:
1430          *value = xmvis->visinfo->depth;
1431          return 0;
1432       case GLX_LEVEL:
1433          *value = xmvis->mesa_visual.level;
1434          return 0;
1435       case GLX_RGBA:
1436          if (fbconfig)
1437             return GLX_BAD_ATTRIBUTE;
1438          if (xmvis->mesa_visual.rgbMode) {
1439             *value = True;
1440          }
1441          else {
1442             *value = False;
1443          }
1444          return 0;
1445       case GLX_DOUBLEBUFFER:
1446          *value = (int) xmvis->mesa_visual.doubleBufferMode;
1447          return 0;
1448       case GLX_STEREO:
1449          *value = (int) xmvis->mesa_visual.stereoMode;
1450          return 0;
1451       case GLX_AUX_BUFFERS:
1452          *value = xmvis->mesa_visual.numAuxBuffers;
1453          return 0;
1454       case GLX_RED_SIZE:
1455          *value = xmvis->mesa_visual.redBits;
1456          return 0;
1457       case GLX_GREEN_SIZE:
1458          *value = xmvis->mesa_visual.greenBits;
1459          return 0;
1460       case GLX_BLUE_SIZE:
1461          *value = xmvis->mesa_visual.blueBits;
1462          return 0;
1463       case GLX_ALPHA_SIZE:
1464          *value = xmvis->mesa_visual.alphaBits;
1465          return 0;
1466       case GLX_DEPTH_SIZE:
1467          *value = xmvis->mesa_visual.depthBits;
1468          return 0;
1469       case GLX_STENCIL_SIZE:
1470          *value = xmvis->mesa_visual.stencilBits;
1471          return 0;
1472       case GLX_ACCUM_RED_SIZE:
1473          *value = xmvis->mesa_visual.accumRedBits;
1474          return 0;
1475       case GLX_ACCUM_GREEN_SIZE:
1476          *value = xmvis->mesa_visual.accumGreenBits;
1477          return 0;
1478       case GLX_ACCUM_BLUE_SIZE:
1479          *value = xmvis->mesa_visual.accumBlueBits;
1480          return 0;
1481       case GLX_ACCUM_ALPHA_SIZE:
1482          *value = xmvis->mesa_visual.accumAlphaBits;
1483          return 0;
1484
1485       /*
1486        * GLX_EXT_visual_info extension
1487        */
1488       case GLX_X_VISUAL_TYPE_EXT:
1489          switch (xmvis->visinfo->CLASS) {
1490             case StaticGray:   *value = GLX_STATIC_GRAY_EXT;   return 0;
1491             case GrayScale:    *value = GLX_GRAY_SCALE_EXT;    return 0;
1492             case StaticColor:  *value = GLX_STATIC_GRAY_EXT;   return 0;
1493             case PseudoColor:  *value = GLX_PSEUDO_COLOR_EXT;  return 0;
1494             case TrueColor:    *value = GLX_TRUE_COLOR_EXT;    return 0;
1495             case DirectColor:  *value = GLX_DIRECT_COLOR_EXT;  return 0;
1496          }
1497          return 0;
1498       case GLX_TRANSPARENT_TYPE_EXT:
1499          /* normal planes */
1500          *value = GLX_NONE_EXT;
1501          return 0;
1502       case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1503          /* undefined */
1504          return 0;
1505       case GLX_TRANSPARENT_RED_VALUE_EXT:
1506          /* undefined */
1507          return 0;
1508       case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1509          /* undefined */
1510          return 0;
1511       case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1512          /* undefined */
1513          return 0;
1514       case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1515          /* undefined */
1516          return 0;
1517
1518       /*
1519        * GLX_EXT_visual_info extension
1520        */
1521       case GLX_VISUAL_CAVEAT_EXT:
1522          /* test for zero, just in case */
1523          if (xmvis->mesa_visual.visualRating > 0)
1524             *value = xmvis->mesa_visual.visualRating;
1525          else
1526             *value = GLX_NONE_EXT;
1527          return 0;
1528
1529       /*
1530        * GLX_ARB_multisample
1531        */
1532       case GLX_SAMPLE_BUFFERS_ARB:
1533          *value = 0;
1534          return 0;
1535       case GLX_SAMPLES_ARB:
1536          *value = 0;
1537          return 0;
1538
1539       /*
1540        * For FBConfigs:
1541        */
1542       case GLX_SCREEN_EXT:
1543          if (!fbconfig)
1544             return GLX_BAD_ATTRIBUTE;
1545          *value = xmvis->visinfo->screen;
1546          break;
1547       case GLX_DRAWABLE_TYPE: /*SGIX too */
1548          if (!fbconfig)
1549             return GLX_BAD_ATTRIBUTE;
1550          *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1551          break;
1552       case GLX_RENDER_TYPE_SGIX:
1553          if (!fbconfig)
1554             return GLX_BAD_ATTRIBUTE;
1555          if (xmvis->mesa_visual.rgbMode)
1556             *value = GLX_RGBA_BIT;
1557          else
1558             *value = GLX_COLOR_INDEX_BIT;
1559          break;
1560       case GLX_X_RENDERABLE_SGIX:
1561          if (!fbconfig)
1562             return GLX_BAD_ATTRIBUTE;
1563          *value = True; /* XXX really? */
1564          break;
1565       case GLX_FBCONFIG_ID_SGIX:
1566          if (!fbconfig)
1567             return GLX_BAD_ATTRIBUTE;
1568          *value = xmvis->visinfo->visualid;
1569          break;
1570       case GLX_MAX_PBUFFER_WIDTH:
1571          if (!fbconfig)
1572             return GLX_BAD_ATTRIBUTE;
1573          /* XXX or MAX_WIDTH? */
1574          *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1575          break;
1576       case GLX_MAX_PBUFFER_HEIGHT:
1577          if (!fbconfig)
1578             return GLX_BAD_ATTRIBUTE;
1579          *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1580          break;
1581       case GLX_MAX_PBUFFER_PIXELS:
1582          if (!fbconfig)
1583             return GLX_BAD_ATTRIBUTE;
1584          *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1585                   DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1586          break;
1587       case GLX_VISUAL_ID:
1588          if (!fbconfig)
1589             return GLX_BAD_ATTRIBUTE;
1590          *value = xmvis->visinfo->visualid;
1591          break;
1592
1593 #ifdef GLX_EXT_texture_from_pixmap
1594       case GLX_BIND_TO_TEXTURE_RGB_EXT:
1595          *value = True; /*XXX*/
1596          break;
1597       case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1598          /* XXX review */
1599          *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1600          break;
1601       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1602          *value = True; /*XXX*/
1603          break;
1604       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1605          *value = (GLX_TEXTURE_1D_BIT_EXT |
1606                    GLX_TEXTURE_2D_BIT_EXT |
1607                    GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1608          break;
1609       case GLX_Y_INVERTED_EXT:
1610          *value = True; /*XXX*/
1611          break;
1612 #endif
1613
1614       default:
1615          return GLX_BAD_ATTRIBUTE;
1616    }
1617    return Success;
1618 }
1619
1620
1621 int
1622 glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1623                    int attrib, int *value )
1624 {
1625    XMesaVisual xmvis;
1626    int k;
1627    if (!dpy || !visinfo)
1628       return GLX_BAD_ATTRIBUTE;
1629
1630    xmvis = find_glx_visual( dpy, visinfo );
1631    if (!xmvis) {
1632       /* this visual wasn't obtained with glXChooseVisual */
1633       xmvis = create_glx_visual( dpy, visinfo );
1634       if (!xmvis) {
1635          /* this visual can't be used for GL rendering */
1636          if (attrib==GLX_USE_GL) {
1637             *value = (int) False;
1638             return 0;
1639          }
1640          else {
1641             return GLX_BAD_VISUAL;
1642          }
1643       }
1644    }
1645
1646    k = get_config(xmvis, attrib, value, GL_FALSE);
1647    return k;
1648 }
1649
1650
1651 void
1652 glXWaitGL( void )
1653 {
1654    XMesaContext xmesa = XMesaGetCurrentContext();
1655    XMesaFlush( xmesa );
1656 }
1657
1658
1659
1660 void
1661 glXWaitX( void )
1662 {
1663    XMesaContext xmesa = XMesaGetCurrentContext();
1664    XMesaFlush( xmesa );
1665 }
1666
1667
1668 static const char *
1669 get_extensions( void )
1670 {
1671    return EXTENSIONS;
1672 }
1673
1674
1675
1676 /* GLX 1.1 and later */
1677 const char *
1678 glXQueryExtensionsString( Display *dpy, int screen )
1679 {
1680    (void) dpy;
1681    (void) screen;
1682    return get_extensions();
1683 }
1684
1685
1686
1687 /* GLX 1.1 and later */
1688 const char *
1689 glXQueryServerString( Display *dpy, int screen, int name )
1690 {
1691    static char version[1000];
1692    _mesa_sprintf(version, "%d.%d %s",
1693                  SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, MESA_GLX_VERSION);
1694
1695    (void) dpy;
1696    (void) screen;
1697
1698    switch (name) {
1699       case GLX_EXTENSIONS:
1700          return get_extensions();
1701       case GLX_VENDOR:
1702          return VENDOR;
1703       case GLX_VERSION:
1704          return version;
1705       default:
1706          return NULL;
1707    }
1708 }
1709
1710
1711
1712 /* GLX 1.1 and later */
1713 const char *
1714 glXGetClientString( Display *dpy, int name )
1715 {
1716    static char version[1000];
1717    _mesa_sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1718                  CLIENT_MINOR_VERSION, MESA_GLX_VERSION);
1719
1720    (void) dpy;
1721
1722    switch (name) {
1723       case GLX_EXTENSIONS:
1724          return get_extensions();
1725       case GLX_VENDOR:
1726          return VENDOR;
1727       case GLX_VERSION:
1728          return version;
1729       default:
1730          return NULL;
1731    }
1732 }
1733
1734
1735
1736 /*
1737  * GLX 1.3 and later
1738  */
1739
1740
1741 int
1742 glXGetFBConfigAttrib( Display *dpy, GLXFBConfig config,
1743                            int attribute, int *value )
1744 {
1745    XMesaVisual v = (XMesaVisual) config;
1746    (void) dpy;
1747    (void) config;
1748
1749    if (!dpy || !config || !value)
1750       return -1;
1751
1752    return get_config(v, attribute, value, GL_TRUE);
1753 }
1754
1755
1756 GLXFBConfig *
1757 glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1758 {
1759    XVisualInfo *visuals, visTemplate;
1760    const long visMask = VisualScreenMask;
1761    int i;
1762
1763    /* Get list of all X visuals */
1764    visTemplate.screen = screen;
1765    visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1766    if (*nelements > 0) {
1767       XMesaVisual *results;
1768       results = (XMesaVisual *) _mesa_malloc(*nelements * sizeof(XMesaVisual));
1769       if (!results) {
1770          *nelements = 0;
1771          return NULL;
1772       }
1773       for (i = 0; i < *nelements; i++) {
1774          results[i] = create_glx_visual(dpy, visuals + i);
1775       }
1776       return (GLXFBConfig *) results;
1777    }
1778    return NULL;
1779 }
1780
1781
1782 GLXFBConfig *
1783 glXChooseFBConfig( Display *dpy, int screen,
1784                         const int *attribList, int *nitems )
1785 {
1786    XMesaVisual xmvis;
1787
1788    if (!attribList || !attribList[0]) {
1789       /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1790       return glXGetFBConfigs(dpy, screen, nitems);
1791    }
1792
1793    xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1794    if (xmvis) {
1795       GLXFBConfig *config = (GLXFBConfig *) _mesa_malloc(sizeof(XMesaVisual));
1796       if (!config) {
1797          *nitems = 0;
1798          return NULL;
1799       }
1800       *nitems = 1;
1801       config[0] = (GLXFBConfig) xmvis;
1802       return (GLXFBConfig *) config;
1803    }
1804    else {
1805       *nitems = 0;
1806       return NULL;
1807    }
1808 }
1809
1810
1811 XVisualInfo *
1812 glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1813 {
1814    if (dpy && config) {
1815       XMesaVisual xmvis = (XMesaVisual) config;
1816 #if 0
1817       return xmvis->vishandle;
1818 #else
1819       /* create a new vishandle - the cached one may be stale */
1820       xmvis->vishandle = (XVisualInfo *) _mesa_malloc(sizeof(XVisualInfo));
1821       if (xmvis->vishandle) {
1822          _mesa_memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1823       }
1824       return xmvis->vishandle;
1825 #endif
1826    }
1827    else {
1828       return NULL;
1829    }
1830 }
1831
1832
1833 GLXWindow
1834 glXCreateWindow( Display *dpy, GLXFBConfig config, Window win,
1835                       const int *attribList )
1836 {
1837    XMesaVisual xmvis = (XMesaVisual) config;
1838    XMesaBuffer xmbuf;
1839    if (!xmvis)
1840       return 0;
1841
1842    xmbuf = XMesaCreateWindowBuffer(xmvis, win);
1843    if (!xmbuf)
1844       return 0;
1845
1846    (void) dpy;
1847    (void) attribList;  /* Ignored in GLX 1.3 */
1848
1849    return win;  /* A hack for now */
1850 }
1851
1852
1853 void
1854 glXDestroyWindow( Display *dpy, GLXWindow window )
1855 {
1856    XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
1857    if (b)
1858       XMesaDestroyBuffer(b);
1859    /* don't destroy X window */
1860 }
1861
1862
1863 /* XXX untested */
1864 GLXPixmap
1865 glXCreatePixmap( Display *dpy, GLXFBConfig config, Pixmap pixmap,
1866                       const int *attribList )
1867 {
1868    XMesaVisual v = (XMesaVisual) config;
1869    XMesaBuffer b;
1870    const int *attr;
1871    int target = 0, format = 0, mipmap = 0;
1872    int value;
1873
1874    if (!dpy || !config || !pixmap)
1875       return 0;
1876
1877    for (attr = attribList; attr && *attr; attr++) {
1878       switch (*attr) {
1879       case GLX_TEXTURE_FORMAT_EXT:
1880          attr++;
1881          switch (*attr) {
1882          case GLX_TEXTURE_FORMAT_NONE_EXT:
1883          case GLX_TEXTURE_FORMAT_RGB_EXT:
1884          case GLX_TEXTURE_FORMAT_RGBA_EXT:
1885             format = *attr;
1886             break;
1887          default:
1888             /* error */
1889             return 0;
1890          }
1891          break;
1892       case GLX_TEXTURE_TARGET_EXT:
1893          attr++;
1894          switch (*attr) {
1895          case GLX_TEXTURE_1D_EXT:
1896          case GLX_TEXTURE_2D_EXT:
1897          case GLX_TEXTURE_RECTANGLE_EXT:
1898             target = *attr;
1899             break;
1900          default:
1901             /* error */
1902             return 0;
1903          }
1904          break;
1905       case GLX_MIPMAP_TEXTURE_EXT:
1906          attr++;
1907          if (*attr)
1908             mipmap = 1;
1909          break;
1910       default:
1911          /* error */
1912          return 0;
1913       }
1914    }
1915
1916    if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
1917       if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
1918                      &value, GL_TRUE) != Success
1919           || !value) {
1920          return 0; /* error! */
1921       }
1922    }
1923    else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1924       if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
1925                      &value, GL_TRUE) != Success
1926           || !value) {
1927          return 0; /* error! */
1928       }
1929    }
1930    if (mipmap) {
1931       if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
1932                      &value, GL_TRUE) != Success
1933           || !value) {
1934          return 0; /* error! */
1935       }
1936    }
1937    if (target == GLX_TEXTURE_1D_EXT) {
1938       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1939                      &value, GL_TRUE) != Success
1940           || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
1941          return 0; /* error! */
1942       }
1943    }
1944    else if (target == GLX_TEXTURE_2D_EXT) {
1945       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1946                      &value, GL_TRUE) != Success
1947           || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
1948          return 0; /* error! */
1949       }
1950    }
1951    if (target == GLX_TEXTURE_RECTANGLE_EXT) {
1952       if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1953                      &value, GL_TRUE) != Success
1954           || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
1955          return 0; /* error! */
1956       }
1957    }
1958
1959    if (format || target || mipmap) {
1960       /* texture from pixmap */
1961       b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
1962    }
1963    else {
1964       b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1965    }
1966    if (!b) {
1967       return 0;
1968    }
1969
1970    return pixmap;
1971 }
1972
1973
1974 void
1975 glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1976 {
1977    XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
1978    if (b)
1979       XMesaDestroyBuffer(b);
1980    /* don't destroy X pixmap */
1981 }
1982
1983
1984 GLXPbuffer
1985 glXCreatePbuffer( Display *dpy, GLXFBConfig config,
1986                        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; /* ignored */
2009             break;
2010          case GLX_LARGEST_PBUFFER:
2011             attrib++;
2012             useLargest = *attrib; /* ignored */
2013             break;
2014          default:
2015             return 0;
2016       }
2017    }
2018
2019    /* not used at this time */
2020    (void) useLargest;
2021    (void) preserveContents;
2022
2023    if (width == 0 || height == 0)
2024       return 0;
2025
2026    xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2027    /* A GLXPbuffer handle must be an X Drawable because that's what
2028     * glXMakeCurrent takes.
2029     */
2030    if (xmbuf)
2031       return (GLXPbuffer) xmbuf->drawable;
2032    else
2033       return 0;
2034 }
2035
2036
2037 void
2038 glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2039 {
2040    XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2041    if (b) {
2042       XMesaDestroyBuffer(b);
2043    }
2044 }
2045
2046
2047 void
2048 glXQueryDrawable( Display *dpy, GLXDrawable draw, int attribute,
2049                        unsigned int *value )
2050 {
2051    XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2052    if (!xmbuf)
2053       return;
2054
2055    switch (attribute) {
2056       case GLX_WIDTH:
2057          *value = xmesa_buffer_width(xmbuf);
2058          break;
2059       case GLX_HEIGHT:
2060          *value = xmesa_buffer_width(xmbuf);
2061          break;
2062       case GLX_PRESERVED_CONTENTS:
2063          *value = True;
2064          break;
2065       case GLX_LARGEST_PBUFFER:
2066          *value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
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 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       _mesa_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 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_BIT;
2139       else
2140          *value = GLX_COLOR_INDEX_BIT;
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 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 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 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 int
2190 glXGetVideoSyncSGI(unsigned int *count)
2191 {
2192    /* this is a bogus implementation */
2193    *count = FrameCounter++;
2194    return 0;
2195 }
2196
2197 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 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 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 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 void
2257 glXFreeContextEXT(Display *dpy, GLXContext context)
2258 {
2259    (void) dpy;
2260    (void) context;
2261 }
2262
2263 GLXContextID
2264 glXGetContextIDEXT(const GLXContext context)
2265 {
2266    (void) context;
2267    return 0;
2268 }
2269
2270 GLXContext
2271 glXImportContextEXT(Display *dpy, GLXContextID contextID)
2272 {
2273    (void) dpy;
2274    (void) contextID;
2275    return 0;
2276 }
2277
2278 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 int
2293 glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config, int attribute, int *value)
2294 {
2295    return glXGetFBConfigAttrib(dpy, config, attribute, value);
2296 }
2297
2298 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 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 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       _mesa_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 XVisualInfo *
2344 glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2345 {
2346    return glXGetVisualFromFBConfig(dpy, config);
2347 }
2348
2349
2350 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 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 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 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 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 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 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 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 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 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 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 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 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 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 void
2578 glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2579 {
2580    (void) dpy;
2581    (void) drawable;
2582    (void) barrier;
2583 }
2584
2585 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 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 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 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 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 }