src/mesa/drivers/x11/fakeglx.c

   1 /* $Id: fakeglx.c,v 1.62 2002/04/02 23:52:53 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  4.1
   6  *
   7  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 /*
  29  * This is an emulation of the GLX API which allows Mesa/GLX-based programs
  30  * to run on X servers which do not have the real GLX extension.
  31  *
  32  * Thanks to the contributors:
  33  *
  34  * Initial version:  Philip Brown (phil@bolthole.com)
  35  * Better glXGetConfig() support: Armin Liebchen (liebchen@asylum.cs.utah.edu)
  36  * Further visual-handling refinements: Wolfram Gloger
  37  *    (wmglo@Dent.MED.Uni-Muenchen.DE).
  38  *
  39  * Notes:
  40  *   Don't be fooled, stereo isn't supported yet.
  41  */
  42
  43
  44
  45 #include "glxheader.h"
  46 #include "glxapi.h"
  47 #include "GL/xmesa.h"
  48 #include "context.h"
  49 #include "config.h"
  50 #include "macros.h"
  51 #include "mem.h"
  52 #include "mmath.h"
  53 #include "mtypes.h"
  54 #include "xfonts.h"
  55 #include "xmesaP.h"
  56
  57
  58 /* This indicates the client-side GLX API and GLX encoder version. */
  59 #define CLIENT_MAJOR_VERSION 1
  60 #define CLIENT_MINOR_VERSION 4  /* but don't have 1.3's pbuffers, etc yet */
  61
  62 /* This indicates the server-side GLX decoder version.
  63  * GLX 1.4 indicates OpenGL 1.3 support
  64  */
  65 #define SERVER_MAJOR_VERSION 1
  66 #define SERVER_MINOR_VERSION 4
  67
  68 /* This is appended onto the glXGetClient/ServerString version strings. */
  69 #define MESA_GLX_VERSION "Mesa 4.1"
  70
  71 /* Who implemented this GLX? */
  72 #define VENDOR "Brian Paul"
  73
  74
  75
  76 /* Silence compiler warnings */
  77 extern void Fake_glXDummyFunc( void );
  78 void Fake_glXDummyFunc( void )
  79 {
  80    (void) kernel8;
  81    (void) DitherValues;
  82    (void) HPCR_DRGB;
  83    (void) kernel1;
  84 }
  85
  86
  87 /*
  88  * Our fake GLX context will contain a "real" GLX context and an XMesa context.
  89  *
  90  * Note that a pointer to a __GLXcontext is a pointer to a fake_glx_context,
  91  * and vice versa.
  92  *
  93  * We really just need this structure in order to make the libGL functions
  94  * glXGetCurrentContext(), glXGetCurrentDrawable() and glXGetCurrentDisplay()
  95  * work correctly.
  96  */
  97 struct fake_glx_context {
  98    __GLXcontext glxContext;   /* this MUST be first! */
  99    XMesaContext xmesaContext;
 100 };
 101
 102
 103
 104 /**********************************************************************/
 105 /***                       GLX Visual Code                          ***/
 106 /**********************************************************************/
 107
 108 #define DONT_CARE -1
 109
 110
 111 #define MAX_VISUALS 100
 112 static XMesaVisual VisualTable[MAX_VISUALS];
 113 static int NumVisuals = 0;
 114
 115
 116 /*
 117  * This struct and some code fragments borrowed
 118  * from Mark Kilgard's GLUT library.
 119  */
 120 typedef struct _OverlayInfo {
 121   /* Avoid 64-bit portability problems by being careful to use
 122      longs due to the way XGetWindowProperty is specified. Note
 123      that these parameters are passed as CARD32s over X
 124      protocol. */
 125   unsigned long overlay_visual;
 126   long transparent_type;
 127   long value;
 128   long layer;
 129 } OverlayInfo;
 130
 131
 132
 133 /* Macro to handle c_class vs class field name in XVisualInfo struct */
 134 #if defined(__cplusplus) || defined(c_plusplus)
 135 #define CLASS c_class
 136 #else
 137 #define CLASS class
 138 #endif
 139
 140
 141
 142
 143 /*
 144  * Test if the given XVisualInfo is usable for Mesa rendering.
 145  */
 146 static GLboolean is_usable_visual( XVisualInfo *vinfo )
 147 {
 148    switch (vinfo->CLASS) {
 149       case StaticGray:
 150       case GrayScale:
 151          /* Any StaticGray/GrayScale visual works in RGB or CI mode */
 152          return GL_TRUE;
 153       case StaticColor:
 154       case PseudoColor:
 155          /* Any StaticColor/PseudoColor visual of at least 4 bits */
 156          if (vinfo->depth>=4) {
 157             return GL_TRUE;
 158          }
 159          else {
 160             return GL_FALSE;
 161          }
 162       case TrueColor:
 163       case DirectColor:
 164          /* Any depth of TrueColor or DirectColor works in RGB mode */
 165          return GL_TRUE;
 166       default:
 167          /* This should never happen */
 168          return GL_FALSE;
 169    }
 170 }
 171
 172
 173
 174 /*
 175  * Return the level (overlay, normal, underlay) of a given XVisualInfo.
 176  * Input:  dpy - the X display
 177  *         vinfo - the XVisualInfo to test
 178  * Return:  level of the visual:
 179  *             0 = normal planes
 180  *            >0 = overlay planes
 181  *            <0 = underlay planes
 182  */
 183 static int level_of_visual( Display *dpy, XVisualInfo *vinfo )
 184 {
 185    Atom overlayVisualsAtom;
 186    OverlayInfo *overlay_info = NULL;
 187    int numOverlaysPerScreen;
 188    Status status;
 189    Atom actualType;
 190    int actualFormat;
 191    unsigned long sizeData, bytesLeft;
 192    int i;
 193
 194    /*
 195     * The SERVER_OVERLAY_VISUALS property on the root window contains
 196     * a list of overlay visuals.  Get that list now.
 197     */
 198    overlayVisualsAtom = XInternAtom(dpy,"SERVER_OVERLAY_VISUALS", True);
 199    if (overlayVisualsAtom == None) {
 200       return 0;
 201    }
 202
 203    status = XGetWindowProperty(dpy, RootWindow( dpy, vinfo->screen ),
 204                                overlayVisualsAtom, 0L, (long) 10000, False,
 205                                overlayVisualsAtom, &actualType, &actualFormat,
 206                                &sizeData, &bytesLeft,
 207                                (unsigned char **) &overlay_info );
 208
 209    if (status != Success || actualType != overlayVisualsAtom ||
 210        actualFormat != 32 || sizeData < 4) {
 211       /* something went wrong */
 212       XFree((void *) overlay_info);
 213       return 0;
 214    }
 215
 216    /* search the overlay visual list for the visual ID of interest */
 217    numOverlaysPerScreen = (int) (sizeData / 4);
 218    for (i=0;i<numOverlaysPerScreen;i++) {
 219       OverlayInfo *ov;
 220       ov = overlay_info + i;
 221       if (ov->overlay_visual==vinfo->visualid) {
 222          /* found the visual */
 223          if (/*ov->transparent_type==1 &&*/ ov->layer!=0) {
 224             int level = ov->layer;
 225             XFree((void *) overlay_info);
 226             return level;
 227          }
 228          else {
 229             XFree((void *) overlay_info);
 230             return 0;
 231          }
 232       }
 233    }
 234
 235    /* The visual ID was not found in the overlay list. */
 236    XFree((void *) overlay_info);
 237    return 0;
 238 }
 239
 240
 241
 242
 243 /*
 244  * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
 245  * configuration in our list of GLX visuals.
 246  */
 247 static XMesaVisual
 248 save_glx_visual( Display *dpy, XVisualInfo *vinfo,
 249                  GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
 250                  GLboolean stereoFlag,
 251                  GLint depth_size, GLint stencil_size,
 252                  GLint accumRedSize, GLint accumGreenSize,
 253                  GLint accumBlueSize, GLint accumAlphaSize,
 254                  GLint level )
 255 {
 256    GLboolean ximageFlag = GL_TRUE;
 257    XMesaVisual xmvis;
 258    GLint i;
 259    GLboolean comparePointers;
 260
 261    if (dbFlag) {
 262       /* Check if the MESA_BACK_BUFFER env var is set */
 263       char *backbuffer = getenv("MESA_BACK_BUFFER");
 264       if (backbuffer) {
 265          if (backbuffer[0]=='p' || backbuffer[0]=='P') {
 266             ximageFlag = GL_FALSE;
 267          }
 268          else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
 269             ximageFlag = GL_TRUE;
 270          }
 271          else {
 272             fprintf(stderr, "Mesa: invalid value for MESA_BACK_BUFFER ");
 273             fprintf(stderr, "environment variable, using an XImage.\n");
 274          }
 275       }
 276    }
 277
 278    /* Comparing IDs uses less memory but sometimes fails. */
 279    /* XXX revisit this after 3.0 is finished. */
 280    if (getenv("MESA_GLX_VISUAL_HACK"))
 281       comparePointers = GL_TRUE;
 282    else
 283       comparePointers = GL_FALSE;
 284
 285    /* First check if a matching visual is already in the list */
 286    for (i=0; i<NumVisuals; i++) {
 287       XMesaVisual v = VisualTable[i];
 288       if (v->display == dpy
 289           && v->level == level
 290           && v->ximage_flag == ximageFlag
 291           && v->mesa_visual.rgbMode == rgbFlag
 292           && v->mesa_visual.doubleBufferMode == dbFlag
 293           && v->mesa_visual.stereoMode == stereoFlag
 294           && (v->mesa_visual.alphaBits > 0) == alphaFlag
 295           && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
 296           && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
 297           && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
 298           && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
 299           && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
 300           && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
 301          /* now either compare XVisualInfo pointers or visual IDs */
 302          if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
 303              || (comparePointers && v->vishandle == vinfo)) {
 304             return v;
 305          }
 306       }
 307    }
 308
 309    /* Create a new visual and add it to the list. */
 310
 311    if (NumVisuals>=MAX_VISUALS) {
 312       fprintf( stderr, "GLX Error: maximum number of visuals exceeded\n");
 313       return NULL;
 314    }
 315
 316    xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
 317                               stereoFlag, ximageFlag,
 318                               depth_size, stencil_size,
 319                               accumRedSize, accumBlueSize,
 320                               accumBlueSize, accumAlphaSize, 0, level,
 321                               GLX_NONE_EXT );
 322    if (xmvis) {
 323       VisualTable[NumVisuals] = xmvis;
 324       NumVisuals++;
 325    }
 326    return xmvis;
 327 }
 328
 329
 330
 331 /*
 332  * Create a GLX visual from a regular XVisualInfo.
 333  * This is called when Fake GLX is given an XVisualInfo which wasn't
 334  * returned by glXChooseVisual.  Since this is the first time we're
 335  * considering this visual we'll take a guess at reasonable values
 336  * for depth buffer size, stencil size, accum size, etc.
 337  * This is the best we can do with a client-side emulation of GLX.
 338  */
 339 static XMesaVisual
 340 create_glx_visual( Display *dpy, XVisualInfo *visinfo )
 341 {
 342    int vislevel;
 343
 344    vislevel = level_of_visual( dpy, visinfo );
 345    if (vislevel) {
 346       /* Configure this visual as a CI, single-buffered overlay */
 347       return save_glx_visual( dpy, visinfo,
 348                               GL_FALSE,  /* rgb */
 349                               GL_FALSE,  /* alpha */
 350                               GL_FALSE,  /* double */
 351                               GL_FALSE,  /* stereo */
 352                               0,         /* depth bits */
 353                               0,         /* stencil bits */
 354                               0,0,0,0,   /* accum bits */
 355                               vislevel   /* level */
 356                             );
 357    }
 358    else if (is_usable_visual( visinfo )) {
 359       if (getenv("MESA_GLX_FORCE_CI")) {
 360          /* Configure this visual as a COLOR INDEX visual. */
 361          return save_glx_visual( dpy, visinfo,
 362                                  GL_FALSE,   /* rgb */
 363                                  GL_FALSE,  /* alpha */
 364                                  GL_TRUE,   /* double */
 365                                  GL_FALSE,  /* stereo */
 366                                  DEFAULT_SOFTWARE_DEPTH_BITS,
 367                                  8 * sizeof(GLstencil),
 368                                  0 * sizeof(GLaccum), /* r */
 369                                  0 * sizeof(GLaccum), /* g */
 370                                  0 * sizeof(GLaccum), /* b */
 371                                  0 * sizeof(GLaccum), /* a */
 372                                  0          /* level */
 373                                );
 374       }
 375       else {
 376          /* Configure this visual as RGB, double-buffered, depth-buffered. */
 377          /* This is surely wrong for some people's needs but what else */
 378          /* can be done?  They should use glXChooseVisual(). */
 379          return save_glx_visual( dpy, visinfo,
 380                                  GL_TRUE,   /* rgb */
 381                                  GL_FALSE,  /* alpha */
 382                                  GL_TRUE,   /* double */
 383                                  GL_FALSE,  /* stereo */
 384                                  DEFAULT_SOFTWARE_DEPTH_BITS,
 385                                  8 * sizeof(GLstencil),
 386                                  8 * sizeof(GLaccum), /* r */
 387                                  8 * sizeof(GLaccum), /* g */
 388                                  8 * sizeof(GLaccum), /* b */
 389                                  8 * sizeof(GLaccum), /* a */
 390                                  0          /* level */
 391                                );
 392       }
 393    }
 394    else {
 395       fprintf(stderr,"Mesa: error in glXCreateContext: bad visual\n");
 396       return NULL;
 397    }
 398 }
 399
 400
 401
 402 /*
 403  * Find the GLX visual associated with an XVisualInfo.
 404  */
 405 static XMesaVisual
 406 find_glx_visual( Display *dpy, XVisualInfo *vinfo )
 407 {
 408    int i;
 409
 410    /* First try to match pointers */
 411    for (i=0;i<NumVisuals;i++) {
 412       if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
 413          return VisualTable[i];
 414       }
 415    }
 416    /* try to match visual id */
 417    for (i=0;i<NumVisuals;i++) {
 418       if (VisualTable[i]->display==dpy
 419           && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
 420          return VisualTable[i];
 421       }
 422    }
 423    return NULL;
 424 }
 425
 426
 427
 428 /*
 429  * Return the transparent pixel value for a GLX visual.
 430  * Input:  glxvis - the glx_visual
 431  * Return:  a pixel value or -1 if no transparent pixel
 432  */
 433 static int transparent_pixel( XMesaVisual glxvis )
 434 {
 435    Display *dpy = glxvis->display;
 436    XVisualInfo *vinfo = glxvis->visinfo;
 437    Atom overlayVisualsAtom;
 438    OverlayInfo *overlay_info = NULL;
 439    int numOverlaysPerScreen;
 440    Status status;
 441    Atom actualType;
 442    int actualFormat;
 443    unsigned long sizeData, bytesLeft;
 444    int i;
 445
 446    /*
 447     * The SERVER_OVERLAY_VISUALS property on the root window contains
 448     * a list of overlay visuals.  Get that list now.
 449     */
 450    overlayVisualsAtom = XInternAtom(dpy,"SERVER_OVERLAY_VISUALS", True);
 451    if (overlayVisualsAtom == None) {
 452       return -1;
 453    }
 454
 455    status = XGetWindowProperty(dpy, RootWindow( dpy, vinfo->screen ),
 456                                overlayVisualsAtom, 0L, (long) 10000, False,
 457                                overlayVisualsAtom, &actualType, &actualFormat,
 458                                &sizeData, &bytesLeft,
 459                                (unsigned char **) &overlay_info );
 460
 461    if (status != Success || actualType != overlayVisualsAtom ||
 462        actualFormat != 32 || sizeData < 4) {
 463       /* something went wrong */
 464       XFree((void *) overlay_info);
 465       return -1;
 466    }
 467
 468    /* search the overlay visual list for the visual ID of interest */
 469    numOverlaysPerScreen = (int) (sizeData / 4);
 470    for (i=0;i<numOverlaysPerScreen;i++) {
 471       OverlayInfo *ov;
 472       ov = overlay_info + i;
 473       if (ov->overlay_visual==vinfo->visualid) {
 474          /* found it! */
 475          if (ov->transparent_type==0) {
 476             /* type 0 indicates no transparency */
 477             XFree((void *) overlay_info);
 478             return -1;
 479          }
 480          else {
 481             /* ov->value is the transparent pixel */
 482             XFree((void *) overlay_info);
 483             return ov->value;
 484          }
 485       }
 486    }
 487
 488    /* The visual ID was not found in the overlay list. */
 489    XFree((void *) overlay_info);
 490    return -1;
 491 }
 492
 493
 494
 495 /*
 496  * Try to get an X visual which matches the given arguments.
 497  */
 498 static XVisualInfo *get_visual( Display *dpy, int scr,
 499                                 unsigned int depth, int xclass )
 500 {
 501    XVisualInfo temp, *vis;
 502    long mask;
 503    int n;
 504    unsigned int default_depth;
 505    int default_class;
 506
 507    mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
 508    temp.screen = scr;
 509    temp.depth = depth;
 510    temp.CLASS = xclass;
 511
 512    default_depth = DefaultDepth(dpy,scr);
 513    default_class = DefaultVisual(dpy,scr)->CLASS;
 514
 515    if (depth==default_depth && xclass==default_class) {
 516       /* try to get root window's visual */
 517       temp.visualid = DefaultVisual(dpy,scr)->visualid;
 518       mask |= VisualIDMask;
 519    }
 520
 521    vis = XGetVisualInfo( dpy, mask, &temp, &n );
 522
 523    /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
 524     * An SGI Infinite Reality system, for example, can have 30bpp pixels:
 525     * 10 bits per color channel.  Mesa's limited to a max of 8 bits/channel.
 526     */
 527    if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
 528       if (_mesa_bitcount((GLuint) vis->red_mask  ) <= 8 &&
 529           _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
 530           _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
 531          return vis;
 532       }
 533       else {
 534          XFree((void *) vis);
 535          return NULL;
 536       }
 537    }
 538
 539    return vis;
 540 }
 541
 542
 543
 544 /*
 545  * Retrieve the value of the given environment variable and find
 546  * the X visual which matches it.
 547  * Input:  dpy - the display
 548  *         screen - the screen number
 549  *         varname - the name of the environment variable
 550  * Return:  an XVisualInfo pointer to NULL if error.
 551  */
 552 static XVisualInfo *get_env_visual(Display *dpy, int scr, const char *varname)
 553 {
 554    char value[100], type[100];
 555    int depth, xclass = -1;
 556    XVisualInfo *vis;
 557
 558    if (!getenv( varname )) {
 559       return NULL;
 560    }
 561
 562    strncpy( value, getenv(varname), 100 );
 563    value[99] = 0;
 564
 565    sscanf( value, "%s %d", type, &depth );
 566
 567    if (strcmp(type,"TrueColor")==0)          xclass = TrueColor;
 568    else if (strcmp(type,"DirectColor")==0)   xclass = DirectColor;
 569    else if (strcmp(type,"PseudoColor")==0)   xclass = PseudoColor;
 570    else if (strcmp(type,"StaticColor")==0)   xclass = StaticColor;
 571    else if (strcmp(type,"GrayScale")==0)     xclass = GrayScale;
 572    else if (strcmp(type,"StaticGray")==0)    xclass = StaticGray;
 573
 574    if (xclass>-1 && depth>0) {
 575       vis = get_visual( dpy, scr, depth, xclass );
 576       if (vis) {
 577          return vis;
 578       }
 579    }
 580
 581    fprintf( stderr, "Mesa: GLX unable to find visual class=%s, depth=%d.\n",
 582             type, depth );
 583    return NULL;
 584 }
 585
 586
 587
 588 /*
 589  * Select an X visual which satisfies the RGBA/CI flag and minimum depth.
 590  * Input:  dpy, screen - X display and screen number
 591  *         rgba - GL_TRUE = RGBA mode, GL_FALSE = CI mode
 592  *         min_depth - minimum visual depth
 593  *         preferred_class - preferred GLX visual class or DONT_CARE
 594  * Return:  pointer to an XVisualInfo or NULL.
 595  */
 596 static XVisualInfo *choose_x_visual( Display *dpy, int screen,
 597                                      GLboolean rgba, int min_depth,
 598                                      int preferred_class )
 599 {
 600    XVisualInfo *vis;
 601    int xclass, visclass = 0;
 602    int depth;
 603
 604    if (rgba) {
 605       Atom hp_cr_maps = XInternAtom(dpy, "_HP_RGB_SMOOTH_MAP_LIST", True);
 606       /* First see if the MESA_RGB_VISUAL env var is defined */
 607       vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
 608       if (vis) {
 609          return vis;
 610       }
 611       /* Otherwise, search for a suitable visual */
 612       if (preferred_class==DONT_CARE) {
 613          for (xclass=0;xclass<6;xclass++) {
 614             switch (xclass) {
 615                case 0:  visclass = TrueColor;    break;
 616                case 1:  visclass = DirectColor;  break;
 617                case 2:  visclass = PseudoColor;  break;
 618                case 3:  visclass = StaticColor;  break;
 619                case 4:  visclass = GrayScale;    break;
 620                case 5:  visclass = StaticGray;   break;
 621             }
 622             if (min_depth==0) {
 623                /* start with shallowest */
 624                for (depth=0;depth<=32;depth++) {
 625                   if (visclass==TrueColor && depth==8 && !hp_cr_maps) {
 626                      /* Special case:  try to get 8-bit PseudoColor before */
 627                      /* 8-bit TrueColor */
 628                      vis = get_visual( dpy, screen, 8, PseudoColor );
 629                      if (vis) {
 630                         return vis;
 631                      }
 632                   }
 633                   vis = get_visual( dpy, screen, depth, visclass );
 634                   if (vis) {
 635                      return vis;
 636                   }
 637                }
 638             }
 639             else {
 640                /* start with deepest */
 641                for (depth=32;depth>=min_depth;depth--) {
 642                   if (visclass==TrueColor && depth==8 && !hp_cr_maps) {
 643                      /* Special case:  try to get 8-bit PseudoColor before */
 644                      /* 8-bit TrueColor */
 645                      vis = get_visual( dpy, screen, 8, PseudoColor );
 646                      if (vis) {
 647                         return vis;
 648                      }
 649                   }
 650                   vis = get_visual( dpy, screen, depth, visclass );
 651                   if (vis) {
 652                      return vis;
 653                   }
 654                }
 655             }
 656          }
 657       }
 658       else {
 659          /* search for a specific visual class */
 660          switch (preferred_class) {
 661             case GLX_TRUE_COLOR_EXT:    visclass = TrueColor;    break;
 662             case GLX_DIRECT_COLOR_EXT:  visclass = DirectColor;  break;
 663             case GLX_PSEUDO_COLOR_EXT:  visclass = PseudoColor;  break;
 664             case GLX_STATIC_COLOR_EXT:  visclass = StaticColor;  break;
 665             case GLX_GRAY_SCALE_EXT:    visclass = GrayScale;    break;
 666             case GLX_STATIC_GRAY_EXT:   visclass = StaticGray;   break;
 667             default:   return NULL;
 668          }
 669          if (min_depth==0) {
 670             /* start with shallowest */
 671             for (depth=0;depth<=32;depth++) {
 672                vis = get_visual( dpy, screen, depth, visclass );
 673                if (vis) {
 674                   return vis;
 675                }
 676             }
 677          }
 678          else {
 679             /* start with deepest */
 680             for (depth=32;depth>=min_depth;depth--) {
 681                vis = get_visual( dpy, screen, depth, visclass );
 682                if (vis) {
 683                   return vis;
 684                }
 685             }
 686          }
 687       }
 688    }
 689    else {
 690       /* First see if the MESA_CI_VISUAL env var is defined */
 691       vis = get_env_visual( dpy, screen, "MESA_CI_VISUAL" );
 692       if (vis) {
 693          return vis;
 694       }
 695       /* Otherwise, search for a suitable visual, starting with shallowest */
 696       if (preferred_class==DONT_CARE) {
 697          for (xclass=0;xclass<4;xclass++) {
 698             switch (xclass) {
 699                case 0:  visclass = PseudoColor;  break;
 700                case 1:  visclass = StaticColor;  break;
 701                case 2:  visclass = GrayScale;    break;
 702                case 3:  visclass = StaticGray;   break;
 703             }
 704             /* try 8-bit up through 16-bit */
 705             for (depth=8;depth<=16;depth++) {
 706                vis = get_visual( dpy, screen, depth, visclass );
 707                if (vis) {
 708                   return vis;
 709                }
 710             }
 711             /* try min_depth up to 8-bit */
 712             for (depth=min_depth;depth<8;depth++) {
 713                vis = get_visual( dpy, screen, depth, visclass );
 714                if (vis) {
 715                   return vis;
 716                }
 717             }
 718          }
 719       }
 720       else {
 721          /* search for a specific visual class */
 722          switch (preferred_class) {
 723             case GLX_TRUE_COLOR_EXT:    visclass = TrueColor;    break;
 724             case GLX_DIRECT_COLOR_EXT:  visclass = DirectColor;  break;
 725             case GLX_PSEUDO_COLOR_EXT:  visclass = PseudoColor;  break;
 726             case GLX_STATIC_COLOR_EXT:  visclass = StaticColor;  break;
 727             case GLX_GRAY_SCALE_EXT:    visclass = GrayScale;    break;
 728             case GLX_STATIC_GRAY_EXT:   visclass = StaticGray;   break;
 729             default:   return NULL;
 730          }
 731          /* try 8-bit up through 16-bit */
 732          for (depth=8;depth<=16;depth++) {
 733             vis = get_visual( dpy, screen, depth, visclass );
 734             if (vis) {
 735                return vis;
 736             }
 737          }
 738          /* try min_depth up to 8-bit */
 739          for (depth=min_depth;depth<8;depth++) {
 740             vis = get_visual( dpy, screen, depth, visclass );
 741             if (vis) {
 742                return vis;
 743             }
 744          }
 745       }
 746    }
 747
 748    /* didn't find a visual */
 749    return NULL;
 750 }
 751
 752
 753
 754 /*
 755  * Find the deepest X over/underlay visual of at least min_depth.
 756  * Input:  dpy, screen - X display and screen number
 757  *         level - the over/underlay level
 758  *         trans_type - transparent pixel type: GLX_NONE_EXT,
 759  *                      GLX_TRANSPARENT_RGB_EXT, GLX_TRANSPARENT_INDEX_EXT,
 760  *                      or DONT_CARE
 761  *         trans_value - transparent pixel value or DONT_CARE
 762  *         min_depth - minimum visual depth
 763  *         preferred_class - preferred GLX visual class or DONT_CARE
 764  * Return:  pointer to an XVisualInfo or NULL.
 765  */
 766 static XVisualInfo *choose_x_overlay_visual( Display *dpy, int scr,
 767                                              GLboolean rgbFlag,
 768                                              int level, int trans_type,
 769                                              int trans_value,
 770                                              int min_depth,
 771                                              int preferred_class )
 772 {
 773    Atom overlayVisualsAtom;
 774    OverlayInfo *overlay_info;
 775    int numOverlaysPerScreen;
 776    Status status;
 777    Atom actualType;
 778    int actualFormat;
 779    unsigned long sizeData, bytesLeft;
 780    int i;
 781    XVisualInfo *deepvis;
 782    int deepest;
 783
 784    /*DEBUG int tt, tv; */
 785
 786    switch (preferred_class) {
 787       case GLX_TRUE_COLOR_EXT:    preferred_class = TrueColor;    break;
 788       case GLX_DIRECT_COLOR_EXT:  preferred_class = DirectColor;  break;
 789       case GLX_PSEUDO_COLOR_EXT:  preferred_class = PseudoColor;  break;
 790       case GLX_STATIC_COLOR_EXT:  preferred_class = StaticColor;  break;
 791       case GLX_GRAY_SCALE_EXT:    preferred_class = GrayScale;    break;
 792       case GLX_STATIC_GRAY_EXT:   preferred_class = StaticGray;   break;
 793       default:                    preferred_class = DONT_CARE;
 794    }
 795
 796    /*
 797     * The SERVER_OVERLAY_VISUALS property on the root window contains
 798     * a list of overlay visuals.  Get that list now.
 799     */
 800    overlayVisualsAtom = XInternAtom(dpy,"SERVER_OVERLAY_VISUALS", True);
 801    if (overlayVisualsAtom == (Atom) None) {
 802       return NULL;
 803    }
 804
 805    status = XGetWindowProperty(dpy, RootWindow( dpy, scr ),
 806                                overlayVisualsAtom, 0L, (long) 10000, False,
 807                                overlayVisualsAtom, &actualType, &actualFormat,
 808                                &sizeData, &bytesLeft,
 809                                (unsigned char **) &overlay_info );
 810
 811    if (status != Success || actualType != overlayVisualsAtom ||
 812        actualFormat != 32 || sizeData < 4) {
 813       /* something went wrong */
 814       return NULL;
 815    }
 816
 817    /* Search for the deepest overlay which satisifies all criteria. */
 818    deepest = min_depth;
 819    deepvis = NULL;
 820
 821    numOverlaysPerScreen = (int) (sizeData / 4);
 822    for (i=0;i<numOverlaysPerScreen;i++) {
 823       XVisualInfo *vislist, vistemplate;
 824       int count;
 825       OverlayInfo *ov;
 826       ov = overlay_info + i;
 827
 828       if (ov->layer!=level) {
 829          /* failed overlay level criteria */
 830          continue;
 831       }
 832       if (!(trans_type==DONT_CARE
 833             || (trans_type==GLX_TRANSPARENT_INDEX_EXT
 834                 && ov->transparent_type>0)
 835             || (trans_type==GLX_NONE_EXT && ov->transparent_type==0))) {
 836          /* failed transparent pixel type criteria */
 837          continue;
 838       }
 839       if (trans_value!=DONT_CARE && trans_value!=ov->value) {
 840          /* failed transparent pixel value criteria */
 841          continue;
 842       }
 843
 844       /* get XVisualInfo and check the depth */
 845       vistemplate.visualid = ov->overlay_visual;
 846       vistemplate.screen = scr;
 847       vislist = XGetVisualInfo( dpy, VisualIDMask | VisualScreenMask,
 848                                 &vistemplate, &count );
 849
 850       if (count!=1) {
 851          /* something went wrong */
 852          continue;
 853       }
 854       if (preferred_class!=DONT_CARE && preferred_class!=vislist->CLASS) {
 855          /* wrong visual class */
 856          continue;
 857       }
 858
 859       /* if RGB was requested, make sure we have True/DirectColor */
 860       if (rgbFlag && vislist->CLASS != TrueColor
 861           && vislist->CLASS != DirectColor)
 862          continue;
 863
 864       /* if CI was requested, make sure we have a color indexed visual */
 865       if (!rgbFlag
 866           && (vislist->CLASS == TrueColor || vislist->CLASS == DirectColor))
 867          continue;
 868
 869       if (deepvis==NULL || vislist->depth > deepest) {
 870          /* YES!  found a satisfactory visual */
 871          if (deepvis) {
 872             XFree( deepvis );
 873          }
 874          deepest = vislist->depth;
 875          deepvis = vislist;
 876          /* DEBUG  tt = ov->transparent_type;*/
 877          /* DEBUG  tv = ov->value; */
 878       }
 879    }
 880
 881 /*DEBUG
 882    if (deepvis) {
 883       printf("chose 0x%x:  layer=%d depth=%d trans_type=%d trans_value=%d\n",
 884              deepvis->visualid, level, deepvis->depth, tt, tv );
 885    }
 886 */
 887    return deepvis;
 888 }
 889
 890
 891 /**********************************************************************/
 892 /***                  Begin Fake GLX API Functions                  ***/
 893 /**********************************************************************/
 894
 895
 896 static XVisualInfo *
 897 Fake_glXChooseVisual( Display *dpy, int screen, int *list )
 898 {
 899    int *parselist;
 900    XVisualInfo *vis;
 901    int min_ci = 0;
 902    int min_red=0, min_green=0, min_blue=0;
 903    GLboolean rgb_flag = GL_FALSE;
 904    GLboolean alpha_flag = GL_FALSE;
 905    GLboolean double_flag = GL_FALSE;
 906    GLboolean stereo_flag = GL_FALSE;
 907    GLint depth_size = 0;
 908    GLint stencil_size = 0;
 909    GLint accumRedSize = 0;
 910    GLint accumGreenSize = 0;
 911    GLint accumBlueSize = 0;
 912    GLint accumAlphaSize = 0;
 913    int level = 0;
 914    int visual_type = DONT_CARE;
 915    int trans_type = DONT_CARE;
 916    int trans_value = DONT_CARE;
 917    GLint caveat = DONT_CARE;
 918
 919    parselist = list;
 920
 921    while (*parselist) {
 922
 923       switch (*parselist) {
 924          case GLX_USE_GL:
 925             /* ignore */
 926             parselist++;
 927             break;
 928          case GLX_BUFFER_SIZE:
 929             parselist++;
 930             min_ci = *parselist++;
 931             break;
 932          case GLX_LEVEL:
 933             parselist++;
 934             level = *parselist++;
 935             break;
 936          case GLX_RGBA:
 937             rgb_flag = GL_TRUE;
 938             parselist++;
 939             break;
 940          case GLX_DOUBLEBUFFER:
 941             double_flag = GL_TRUE;
 942             parselist++;
 943             break;
 944          case GLX_STEREO:
 945             stereo_flag = GL_TRUE;
 946             return NULL;
 947          case GLX_AUX_BUFFERS:
 948             /* ignore */
 949             parselist++;
 950             parselist++;
 951             break;
 952          case GLX_RED_SIZE:
 953             parselist++;
 954             min_red = *parselist++;
 955             break;
 956          case GLX_GREEN_SIZE:
 957             parselist++;
 958             min_green = *parselist++;
 959             break;
 960          case GLX_BLUE_SIZE:
 961             parselist++;
 962             min_blue = *parselist++;
 963             break;
 964          case GLX_ALPHA_SIZE:
 965             parselist++;
 966             {
 967                GLint size = *parselist++;
 968                alpha_flag = size>0 ? 1 : 0;
 969             }
 970             break;
 971          case GLX_DEPTH_SIZE:
 972             parselist++;
 973             depth_size = *parselist++;
 974             break;
 975          case GLX_STENCIL_SIZE:
 976             parselist++;
 977             stencil_size = *parselist++;
 978             break;
 979          case GLX_ACCUM_RED_SIZE:
 980             parselist++;
 981             {
 982                GLint size = *parselist++;
 983                accumRedSize = MAX2( accumRedSize, size );
 984             }
 985             break;
 986          case GLX_ACCUM_GREEN_SIZE:
 987             parselist++;
 988             {
 989                GLint size = *parselist++;
 990                accumGreenSize = MAX2( accumGreenSize, size );
 991             }
 992             break;
 993          case GLX_ACCUM_BLUE_SIZE:
 994             parselist++;
 995             {
 996                GLint size = *parselist++;
 997                accumBlueSize = MAX2( accumBlueSize, size );
 998             }
 999             break;
1000          case GLX_ACCUM_ALPHA_SIZE:
1001             parselist++;
1002             {
1003                GLint size = *parselist++;
1004                accumAlphaSize = MAX2( accumAlphaSize, size );
1005             }
1006             break;
1007
1008          /*
1009           * GLX_EXT_visual_info extension
1010           */
1011          case GLX_X_VISUAL_TYPE_EXT:
1012             parselist++;
1013             visual_type = *parselist++;
1014             break;
1015          case GLX_TRANSPARENT_TYPE_EXT:
1016             parselist++;
1017             trans_type = *parselist++;
1018             break;
1019          case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1020             parselist++;
1021             trans_value = *parselist++;
1022             break;
1023          case GLX_TRANSPARENT_RED_VALUE_EXT:
1024          case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1025          case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1026          case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1027             /* ignore */
1028             parselist++;
1029             parselist++;
1030             break;
1031
1032          /*
1033           * GLX_EXT_visual_info extension
1034           */
1035          case GLX_VISUAL_CAVEAT_EXT:
1036             parselist++;
1037             caveat = *parselist++; /* ignored for now */
1038             break;
1039
1040          case None:
1041             break;
1042          default:
1043             /* undefined attribute */
1044             return NULL;
1045       }
1046    }
1047
1048    /*
1049     * Since we're only simulating the GLX extension this function will never
1050     * find any real GL visuals.  Instead, all we can do is try to find an RGB
1051     * or CI visual of appropriate depth.  Other requested attributes such as
1052     * double buffering, depth buffer, etc. will be associated with the X
1053     * visual and stored in the VisualTable[].
1054     */
1055    if (level==0) {
1056       /* normal color planes */
1057       if (rgb_flag) {
1058          /* Get an RGB visual */
1059          int min_rgb = min_red + min_green + min_blue;
1060          if (min_rgb>1 && min_rgb<8) {
1061             /* a special case to be sure we can get a monochrome visual */
1062             min_rgb = 1;
1063          }
1064          vis = choose_x_visual( dpy, screen, rgb_flag, min_rgb, visual_type );
1065       }
1066       else {
1067          /* Get a color index visual */
1068          vis = choose_x_visual( dpy, screen, rgb_flag, min_ci, visual_type );
1069          accumRedSize = accumGreenSize = accumBlueSize = accumAlphaSize = 0;
1070       }
1071    }
1072    else {
1073       /* over/underlay planes */
1074       if (rgb_flag) {
1075          /* rgba overlay */
1076          int min_rgb = min_red + min_green + min_blue;
1077          if (min_rgb>1 && min_rgb<8) {
1078             /* a special case to be sure we can get a monochrome visual */
1079             min_rgb = 1;
1080          }
1081          vis = choose_x_overlay_visual( dpy, screen, rgb_flag, level,
1082                               trans_type, trans_value, min_rgb, visual_type );
1083       }
1084       else {
1085          /* color index overlay */
1086          vis = choose_x_overlay_visual( dpy, screen, rgb_flag, level,
1087                               trans_type, trans_value, min_ci, visual_type );
1088       }
1089    }
1090
1091    if (vis) {
1092       /* Note: we're not exactly obeying the glXChooseVisual rules here.
1093        * When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
1094        * largest depth buffer size, which is 32bits/value.  Instead, we
1095        * return 16 to maintain performance with earlier versions of Mesa.
1096        */
1097       if (depth_size > 24)
1098          depth_size = 31;   /* 32 causes int overflow problems */
1099       else if (depth_size > 16)
1100          depth_size = 24;
1101       else if (depth_size > 0)
1102          depth_size = DEFAULT_SOFTWARE_DEPTH_BITS; /*16*/
1103
1104       /* we only support one size of stencil and accum buffers. */
1105       if (stencil_size > 0)
1106          stencil_size = STENCIL_BITS;
1107       if (accumRedSize > 0 || accumGreenSize > 0 || accumBlueSize > 0 ||
1108           accumAlphaSize > 0) {
1109          accumRedSize = ACCUM_BITS;
1110          accumGreenSize = ACCUM_BITS;
1111          accumBlueSize = ACCUM_BITS;
1112          accumAlphaSize = alpha_flag ? ACCUM_BITS : 0;
1113       }
1114
1115       if (!save_glx_visual( dpy, vis, rgb_flag, alpha_flag, double_flag,
1116                             stereo_flag, depth_size, stencil_size,
1117                             accumRedSize, accumGreenSize,
1118                             accumBlueSize, accumAlphaSize,
1119                             level ))
1120          return NULL;
1121    }
1122
1123    return vis;
1124 }
1125
1126
1127
1128
1129 static GLXContext
1130 Fake_glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1131                        GLXContext share_list, Bool direct )
1132 {
1133    XMesaVisual glxvis;
1134    struct fake_glx_context *glxCtx;
1135    struct fake_glx_context *shareCtx = (struct fake_glx_context *) share_list;
1136
1137    if (!dpy || !visinfo)
1138       return 0;
1139
1140    glxCtx = CALLOC_STRUCT(fake_glx_context);
1141    if (!glxCtx)
1142       return 0;
1143
1144    /* deallocate unused windows/buffers */
1145    XMesaGarbageCollect();
1146
1147    glxvis = find_glx_visual( dpy, visinfo );
1148    if (!glxvis) {
1149       /* This visual wasn't found with glXChooseVisual() */
1150       glxvis = create_glx_visual( dpy, visinfo );
1151       if (!glxvis) {
1152          /* unusable visual */
1153          FREE(glxCtx);
1154          return NULL;
1155       }
1156    }
1157
1158    glxCtx->xmesaContext = XMesaCreateContext(glxvis,
1159                                    shareCtx ? shareCtx->xmesaContext : NULL);
1160    if (!glxCtx->xmesaContext) {
1161       FREE(glxCtx);
1162       return NULL;
1163    }
1164
1165    glxCtx->xmesaContext->direct = GL_FALSE;
1166    glxCtx->glxContext.isDirect = GL_FALSE;
1167    glxCtx->glxContext.currentDpy = dpy;
1168    glxCtx->glxContext.xid = (XID) glxCtx;  /* self pointer */
1169
1170    assert((void *) glxCtx == (void *) &(glxCtx->glxContext));
1171
1172    return (GLXContext) glxCtx;
1173 }
1174
1175
1176 /* XXX these may have to be removed due to thread-safety issues. */
1177 static GLXContext MakeCurrent_PrevContext = 0;
1178 static GLXDrawable MakeCurrent_PrevDrawable = 0;
1179 static GLXDrawable MakeCurrent_PrevReadable = 0;
1180 static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1181 static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1182
1183
1184 /* GLX 1.3 and later */
1185 static Bool
1186 Fake_glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1187                             GLXDrawable read, GLXContext ctx )
1188 {
1189    struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1190
1191    if (ctx && draw && read) {
1192       XMesaBuffer drawBuffer, readBuffer;
1193       XMesaContext xmctx = glxCtx->xmesaContext;
1194
1195       /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1196       if (ctx == MakeCurrent_PrevContext
1197           && draw == MakeCurrent_PrevDrawable) {
1198          drawBuffer = MakeCurrent_PrevDrawBuffer;
1199       }
1200       else {
1201          drawBuffer = XMesaFindBuffer( dpy, draw );
1202       }
1203       if (!drawBuffer) {
1204          /* drawable must be a new window! */
1205          drawBuffer = XMesaCreateWindowBuffer2( xmctx->xm_visual, draw, xmctx);
1206          if (!drawBuffer) {
1207             /* Out of memory, or context/drawable depth mismatch */
1208             return False;
1209          }
1210       }
1211
1212       /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1213       if (ctx == MakeCurrent_PrevContext
1214           && read == MakeCurrent_PrevReadable) {
1215          readBuffer = MakeCurrent_PrevReadBuffer;
1216       }
1217       else {
1218          readBuffer = XMesaFindBuffer( dpy, read );
1219       }
1220       if (!readBuffer) {
1221          /* drawable must be a new window! */
1222          readBuffer = XMesaCreateWindowBuffer2(glxCtx->xmesaContext->xm_visual,
1223                                                read, xmctx);
1224          if (!readBuffer) {
1225             /* Out of memory, or context/drawable depth mismatch */
1226             return False;
1227          }
1228       }
1229
1230       MakeCurrent_PrevContext = ctx;
1231       MakeCurrent_PrevDrawable = draw;
1232       MakeCurrent_PrevReadable = read;
1233       MakeCurrent_PrevDrawBuffer = drawBuffer;
1234       MakeCurrent_PrevReadBuffer = readBuffer;
1235
1236       /* Now make current! */
1237       if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1238          ((__GLXcontext *) ctx)->currentDpy = dpy;
1239          ((__GLXcontext *) ctx)->currentDrawable = draw;
1240 #ifndef GLX_BUILT_IN_XMESA
1241          ((__GLXcontext *) ctx)->currentReadable = read;
1242 #else
1243          __glXSetCurrentContext(ctx);
1244 #endif
1245          return True;
1246       }
1247       else {
1248          return False;
1249       }
1250    }
1251    else if (!ctx && !draw && !read) {
1252       /* release current context w/out assigning new one. */
1253       XMesaMakeCurrent( NULL, NULL );
1254       MakeCurrent_PrevContext = 0;
1255       MakeCurrent_PrevDrawable = 0;
1256       MakeCurrent_PrevReadable = 0;
1257       MakeCurrent_PrevDrawBuffer = 0;
1258       MakeCurrent_PrevReadBuffer = 0;
1259 #ifdef GLX_BUILT_IN_XMESA
1260       /* XXX bind dummy context with __glXSetCurrentContext(ctx); */
1261 #endif
1262       return True;
1263    }
1264    else {
1265       /* The args must either all be non-zero or all zero.
1266        * This is an error.
1267        */
1268       return False;
1269    }
1270 }
1271
1272
1273
1274 static Bool
1275 Fake_glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1276 {
1277    return Fake_glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1278 }
1279
1280
1281
1282 static GLXPixmap
1283 Fake_glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1284 {
1285    XMesaVisual v;
1286    XMesaBuffer b;
1287
1288    v = find_glx_visual( dpy, visinfo );
1289    if (!v) {
1290       v = create_glx_visual( dpy, visinfo );
1291       if (!v) {
1292          /* unusable visual */
1293          return 0;
1294       }
1295    }
1296
1297    b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1298    if (!b) {
1299       return 0;
1300    }
1301    return b->frontbuffer;
1302 }
1303
1304
1305 /*** GLX_MESA_pixmap_colormap ***/
1306
1307 static GLXPixmap
1308 Fake_glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1309                              Pixmap pixmap, Colormap cmap )
1310 {
1311    XMesaVisual v;
1312    XMesaBuffer b;
1313
1314    v = find_glx_visual( dpy, visinfo );
1315    if (!v) {
1316       v = create_glx_visual( dpy, visinfo );
1317       if (!v) {
1318          /* unusable visual */
1319          return 0;
1320       }
1321    }
1322
1323    b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1324    if (!b) {
1325       return 0;
1326    }
1327    return b->frontbuffer;
1328 }
1329
1330
1331 static void
1332 Fake_glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1333 {
1334    XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1335    if (b) {
1336       XMesaDestroyBuffer(b);
1337    }
1338    else if (getenv("MESA_DEBUG")) {
1339       fprintf( stderr, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1340    }
1341 }
1342
1343
1344
1345 static void
1346 Fake_glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1347                      unsigned long mask )
1348 {
1349    XMesaContext xm_src = (XMesaContext) src;
1350    XMesaContext xm_dst = (XMesaContext) dst;
1351    (void) dpy;
1352    _mesa_copy_context( xm_src->gl_ctx, xm_dst->gl_ctx, (GLuint) mask );
1353 }
1354
1355
1356
1357 static Bool
1358 Fake_glXQueryExtension( Display *dpy, int *errorb, int *event )
1359 {
1360    /* Mesa's GLX isn't really an X extension but we try to act like one. */
1361    (void) dpy;
1362    (void) errorb;
1363    (void) event;
1364    return True;
1365 }
1366
1367
1368 extern void _kw_ungrab_all( Display *dpy );
1369 void _kw_ungrab_all( Display *dpy )
1370 {
1371    XUngrabPointer( dpy, CurrentTime );
1372    XUngrabKeyboard( dpy, CurrentTime );
1373 }
1374
1375
1376 static void
1377 Fake_glXDestroyContext( Display *dpy, GLXContext ctx )
1378 {
1379    struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1380    (void) dpy;
1381    MakeCurrent_PrevContext = 0;
1382    MakeCurrent_PrevDrawable = 0;
1383    MakeCurrent_PrevReadable = 0;
1384    MakeCurrent_PrevDrawBuffer = 0;
1385    MakeCurrent_PrevReadBuffer = 0;
1386    XMesaDestroyContext( glxCtx->xmesaContext );
1387    XMesaGarbageCollect();
1388 }
1389
1390
1391
1392 static Bool
1393 Fake_glXIsDirect( Display *dpy, GLXContext ctx )
1394 {
1395    struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1396    (void) dpy;
1397    return glxCtx->xmesaContext->direct;
1398 }
1399
1400
1401
1402 static void
1403 Fake_glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1404 {
1405    XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1406
1407    if (buffer) {
1408       XMesaSwapBuffers(buffer);
1409    }
1410    else if (getenv("MESA_DEBUG")) {
1411       fprintf(stderr, "Mesa Warning: glXSwapBuffers: invalid drawable\n");
1412    }
1413 }
1414
1415
1416
1417 /*** GLX_MESA_copy_sub_buffer ***/
1418
1419 static void
1420 Fake_glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
1421                            int x, int y, int width, int height )
1422 {
1423    XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1424    if (buffer) {
1425       XMesaCopySubBuffer(buffer, x, y, width, height);
1426    }
1427    else if (getenv("MESA_DEBUG")) {
1428       fprintf(stderr, "Mesa Warning: glXCopySubBufferMESA: invalid drawable\n");
1429    }
1430 }
1431
1432
1433
1434 static Bool
1435 Fake_glXQueryVersion( Display *dpy, int *maj, int *min )
1436 {
1437    (void) dpy;
1438    /* Return GLX version, not Mesa version */
1439    assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1440    *maj = CLIENT_MAJOR_VERSION;
1441    *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1442    return True;
1443 }
1444
1445
1446
1447 /*
1448  * Query the GLX attributes of the given XVisualInfo.
1449  */
1450 static int
1451 Fake_glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1452                    int attrib, int *value )
1453 {
1454    XMesaVisual glxvis;
1455
1456    glxvis = find_glx_visual( dpy, visinfo );
1457    if (!glxvis) {
1458       /* this visual wasn't obtained with glXChooseVisual */
1459       glxvis = create_glx_visual( dpy, visinfo );
1460       if (!glxvis) {
1461          /* this visual can't be used for GL rendering */
1462          if (attrib==GLX_USE_GL) {
1463             *value = (int) False;
1464             return 0;
1465          }
1466          else {
1467             /*fprintf( stderr, "Mesa: Error in glXGetConfig: bad visual\n");*/
1468             return GLX_BAD_VISUAL;
1469          }
1470       }
1471    }
1472
1473    switch(attrib) {
1474       case GLX_USE_GL:
1475          *value = (int) True;
1476          return 0;
1477       case GLX_BUFFER_SIZE:
1478          *value = visinfo->depth;
1479          return 0;
1480       case GLX_LEVEL:
1481          *value = glxvis->level;
1482          return 0;
1483       case GLX_RGBA:
1484          if (glxvis->mesa_visual.rgbMode) {
1485             *value = True;
1486          }
1487          else {
1488             *value = False;
1489          }
1490          return 0;
1491       case GLX_DOUBLEBUFFER:
1492          *value = (int) glxvis->mesa_visual.doubleBufferMode;
1493          return 0;
1494       case GLX_STEREO:
1495          *value = (int) glxvis->mesa_visual.stereoMode;
1496          return 0;
1497       case GLX_AUX_BUFFERS:
1498          *value = (int) False;
1499          return 0;
1500       case GLX_RED_SIZE:
1501          *value = glxvis->mesa_visual.redBits;
1502          return 0;
1503       case GLX_GREEN_SIZE:
1504          *value = glxvis->mesa_visual.greenBits;
1505          return 0;
1506       case GLX_BLUE_SIZE:
1507          *value = glxvis->mesa_visual.blueBits;
1508          return 0;
1509       case GLX_ALPHA_SIZE:
1510          *value = glxvis->mesa_visual.alphaBits;
1511          return 0;
1512       case GLX_DEPTH_SIZE:
1513          *value = glxvis->mesa_visual.depthBits;
1514          return 0;
1515       case GLX_STENCIL_SIZE:
1516          *value = glxvis->mesa_visual.stencilBits;
1517          return 0;
1518       case GLX_ACCUM_RED_SIZE:
1519          *value = glxvis->mesa_visual.accumRedBits;
1520          return 0;
1521       case GLX_ACCUM_GREEN_SIZE:
1522          *value = glxvis->mesa_visual.accumGreenBits;
1523          return 0;
1524       case GLX_ACCUM_BLUE_SIZE:
1525          *value = glxvis->mesa_visual.accumBlueBits;
1526          return 0;
1527       case GLX_ACCUM_ALPHA_SIZE:
1528          *value = glxvis->mesa_visual.accumAlphaBits;
1529          return 0;
1530
1531       /*
1532        * GLX_EXT_visual_info extension
1533        */
1534       case GLX_X_VISUAL_TYPE_EXT:
1535          switch (glxvis->visinfo->CLASS) {
1536             case StaticGray:   *value = GLX_STATIC_GRAY_EXT;   return 0;
1537             case GrayScale:    *value = GLX_GRAY_SCALE_EXT;    return 0;
1538             case StaticColor:  *value = GLX_STATIC_GRAY_EXT;   return 0;
1539             case PseudoColor:  *value = GLX_PSEUDO_COLOR_EXT;  return 0;
1540             case TrueColor:    *value = GLX_TRUE_COLOR_EXT;    return 0;
1541             case DirectColor:  *value = GLX_DIRECT_COLOR_EXT;  return 0;
1542          }
1543          return 0;
1544       case GLX_TRANSPARENT_TYPE_EXT:
1545          if (glxvis->level==0) {
1546             /* normal planes */
1547             *value = GLX_NONE_EXT;
1548          }
1549          else if (glxvis->level>0) {
1550             /* overlay */
1551             if (glxvis->mesa_visual.rgbMode) {
1552                *value = GLX_TRANSPARENT_RGB_EXT;
1553             }
1554             else {
1555                *value = GLX_TRANSPARENT_INDEX_EXT;
1556             }
1557          }
1558          else if (glxvis->level<0) {
1559             /* underlay */
1560             *value = GLX_NONE_EXT;
1561          }
1562          return 0;
1563       case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1564          {
1565             int pixel = transparent_pixel( glxvis );
1566             if (pixel>=0) {
1567                *value = pixel;
1568             }
1569             /* else undefined */
1570          }
1571          return 0;
1572       case GLX_TRANSPARENT_RED_VALUE_EXT:
1573          /* undefined */
1574          return 0;
1575       case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1576          /* undefined */
1577          return 0;
1578       case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1579          /* undefined */
1580          return 0;
1581       case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1582          /* undefined */
1583          return 0;
1584
1585       /*
1586        * GLX_EXT_visual_info extension
1587        */
1588       case GLX_VISUAL_CAVEAT_EXT:
1589          /* test for zero, just in case */
1590          if (glxvis->VisualCaveat > 0)
1591             *value = glxvis->VisualCaveat;
1592          else
1593             *value = GLX_NONE_EXT;
1594          return 0;
1595
1596       /*
1597        * Extensions
1598        */
1599       default:
1600          return GLX_BAD_ATTRIBUTE;
1601    }
1602 }
1603
1604
1605
1606 static void
1607 Fake_glXWaitGL( void )
1608 {
1609    XMesaContext xmesa = XMesaGetCurrentContext();
1610    XMesaFlush( xmesa );
1611 }
1612
1613
1614
1615 static void
1616 Fake_glXWaitX( void )
1617 {
1618    XMesaContext xmesa = XMesaGetCurrentContext();
1619    XMesaFlush( xmesa );
1620 }
1621
1622
1623 /*
1624  * Return the extensions string, which is 3Dfx-dependant.
1625  */
1626 static const char *get_extensions( void )
1627 {
1628 #ifdef FX
1629    const char *fx = getenv("MESA_GLX_FX");
1630    if (fx && fx[0] != 'd') {
1631       return "GLX_MESA_pixmap_colormap GLX_EXT_visual_info GLX_EXT_visual_rating GLX_MESA_release_buffers GLX_MESA_copy_sub_buffer GLX_SGI_video_sync GLX_MESA_set_3dfx_mode GLX_ARB_get_proc_address";
1632    }
1633 #endif
1634    return "GLX_MESA_pixmap_colormap GLX_EXT_visual_info GLX_EXT_visual_rating GLX_MESA_release_buffers GLX_MESA_copy_sub_buffer GLX_SGI_video_sync GLX_ARB_get_proc_address";
1635 }
1636
1637
1638
1639 /* GLX 1.1 and later */
1640 static const char *
1641 Fake_glXQueryExtensionsString( Display *dpy, int screen )
1642 {
1643    (void) dpy;
1644    (void) screen;
1645    return get_extensions();
1646 }
1647
1648
1649
1650 /* GLX 1.1 and later */
1651 static const char *
1652 Fake_glXQueryServerString( Display *dpy, int screen, int name )
1653 {
1654    static char version[1000];
1655    sprintf(version, "%d.%d %s", SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION,
1656            MESA_GLX_VERSION);
1657
1658    (void) dpy;
1659    (void) screen;
1660
1661    switch (name) {
1662       case GLX_EXTENSIONS:
1663          return get_extensions();
1664       case GLX_VENDOR:
1665          return VENDOR;
1666       case GLX_VERSION:
1667          return version;
1668       default:
1669          return NULL;
1670    }
1671 }
1672
1673
1674
1675 /* GLX 1.1 and later */
1676 static const char *
1677 Fake_glXGetClientString( Display *dpy, int name )
1678 {
1679    static char version[1000];
1680    sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION, CLIENT_MINOR_VERSION,
1681            MESA_GLX_VERSION);
1682
1683    (void) dpy;
1684
1685    switch (name) {
1686       case GLX_EXTENSIONS:
1687          return get_extensions();
1688       case GLX_VENDOR:
1689          return VENDOR;
1690       case GLX_VERSION:
1691          return version;
1692       default:
1693          return NULL;
1694    }
1695 }
1696
1697
1698
1699 /*
1700  * GLX 1.3 and later
1701  */
1702
1703 /* XXX Move this when done.
1704  * Create an XMesaBuffer as a Pbuffer.
1705  * New in Mesa 4.0 but untested.
1706  */
1707 extern XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap,
1708                                     unsigned int width, unsigned int height );
1709
1710
1711
1712 static GLXFBConfig *
1713 Fake_glXChooseFBConfig( Display *dpy, int screen,
1714                         const int *attribList, int *nitems )
1715 {
1716    (void) dpy;
1717    (void) screen;
1718    (void) attribList;
1719    (void) nitems;
1720    return 0;
1721 }
1722
1723
1724 static int
1725 Fake_glXGetFBConfigAttrib( Display *dpy, GLXFBConfig config,
1726                            int attribute, int *value )
1727 {
1728    XMesaVisual v = NULL; /* XXX Fix this */
1729    (void) dpy;
1730    (void) config;
1731    (void) attribute;
1732    (void) value;
1733
1734    if (!dpy || !config || !value)
1735       return -1;
1736
1737    switch (attribute) {
1738       case GLX_FBCONFIG_ID:
1739       case GLX_BUFFER_SIZE:
1740          if (v->mesa_visual.rgbMode)
1741             *value = v->mesa_visual.redBits + v->mesa_visual.greenBits +
1742                      v->mesa_visual.blueBits + v->mesa_visual.alphaBits;
1743          else
1744             *value = v->mesa_visual.indexBits;
1745          break;
1746       case GLX_LEVEL:
1747          *value = v->level;
1748          break;
1749       case GLX_DOUBLEBUFFER:
1750          *value = v->mesa_visual.doubleBufferMode;
1751          break;
1752       case GLX_STEREO:
1753          *value = v->mesa_visual.stereoMode;
1754          break;
1755       case GLX_AUX_BUFFERS:
1756          *value = v->mesa_visual.numAuxBuffers;
1757          break;
1758       case GLX_RED_SIZE:
1759          *value = v->mesa_visual.redBits;
1760          break;
1761       case GLX_GREEN_SIZE:
1762          *value = v->mesa_visual.greenBits;
1763          break;
1764       case GLX_BLUE_SIZE:
1765          *value = v->mesa_visual.blueBits;
1766          break;
1767       case GLX_ALPHA_SIZE:
1768          *value = v->mesa_visual.alphaBits;
1769          break;
1770       case GLX_DEPTH_SIZE:
1771          *value = v->mesa_visual.depthBits;
1772          break;
1773       case GLX_STENCIL_SIZE:
1774          *value = v->mesa_visual.stencilBits;
1775          break;
1776       case GLX_ACCUM_RED_SIZE:
1777          *value = v->mesa_visual.accumRedBits;
1778          break;
1779       case GLX_ACCUM_GREEN_SIZE:
1780          *value = v->mesa_visual.accumGreenBits;
1781          break;
1782       case GLX_ACCUM_BLUE_SIZE:
1783          *value = v->mesa_visual.accumBlueBits;
1784          break;
1785       case GLX_ACCUM_ALPHA_SIZE:
1786          *value = v->mesa_visual.accumAlphaBits;
1787          break;
1788       case GLX_RENDER_TYPE:
1789          *value = 0; /* XXX ??? */
1790          break;
1791       case GLX_DRAWABLE_TYPE:
1792          *value = GLX_PBUFFER_BIT; /* XXX fix? */
1793          break;
1794       case GLX_X_RENDERABLE:
1795          *value = False; /* XXX ??? */
1796          break;
1797       case GLX_X_VISUAL_TYPE:
1798          switch (v->vishandle->class) {
1799             case GrayScale:
1800                *value = GLX_GRAY_SCALE;
1801                break;
1802             case StaticGray:
1803                *value = GLX_STATIC_GRAY;
1804                break;
1805             case StaticColor:
1806                *value = GLX_STATIC_COLOR;
1807                break;
1808             case PseudoColor:
1809                *value = GLX_PSEUDO_COLOR;
1810                break;
1811             case TrueColor:
1812                *value = GLX_TRUE_COLOR;
1813                break;
1814             case DirectColor:
1815                *value = GLX_DIRECT_COLOR;
1816                break;
1817             default:
1818                *value = 0;
1819          }
1820          break;
1821       case GLX_CONFIG_CAVEAT:
1822          *value = 0; /* XXX ??? */
1823          break;
1824       case GLX_TRANSPARENT_TYPE:
1825          if (v->level == 0) {
1826             /* normal planes */
1827             *value = GLX_NONE_EXT;
1828          }
1829          else if (v->level > 0) {
1830             /* overlay */
1831             if (v->mesa_visual.rgbMode) {
1832                *value = GLX_TRANSPARENT_RGB_EXT;
1833             }
1834             else {
1835                *value = GLX_TRANSPARENT_INDEX_EXT;
1836             }
1837          }
1838          else if (v->level < 0) {
1839             /* underlay */
1840             *value = GLX_NONE_EXT;
1841          }
1842          break;
1843       case GLX_TRANSPARENT_INDEX_VALUE:
1844          *value = transparent_pixel( v );
1845          break;
1846       case GLX_TRANSPARENT_RED_VALUE:
1847          *value = 0;  /* not implemented */
1848          break;
1849       case GLX_TRANSPARENT_GREEN_VALUE:
1850          *value = 0;  /* not implemented */
1851          break;
1852       case GLX_TRANSPARENT_BLUE_VALUE:
1853          *value = 0;  /* not implemented */
1854          break;
1855       case GLX_TRANSPARENT_ALPHA_VALUE:
1856          *value = 0;  /* not implemented */
1857          break;
1858       case GLX_MAX_PBUFFER_WIDTH:
1859          *value = DisplayWidth(dpy, v->vishandle->screen);
1860          break;
1861       case GLX_MAX_PBUFFER_HEIGHT:
1862          *value = DisplayHeight(dpy, v->vishandle->screen);
1863          break;
1864       case GLX_MAX_PBUFFER_PIXELS:
1865          *value = DisplayWidth(dpy, v->vishandle->screen) *
1866                   DisplayHeight(dpy, v->vishandle->screen);
1867          break;
1868       case GLX_VISUAL_ID:
1869          *value = v->vishandle->visualid;
1870          break;
1871       default:
1872          return GLX_BAD_ATTRIBUTE;
1873    }
1874
1875    return Success;
1876 }
1877
1878
1879 static GLXFBConfig *
1880 Fake_glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1881 {
1882    (void) dpy;
1883    (void) screen;
1884    (void) nelements;
1885    return 0;
1886 }
1887
1888
1889 static XVisualInfo *
1890 Fake_glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1891 {
1892    if (dpy && config) {
1893       XMesaVisual v = (XMesaVisual) config;
1894       return v->vishandle;
1895    }
1896    else {
1897       return NULL;
1898    }
1899 }
1900
1901
1902 static GLXWindow
1903 Fake_glXCreateWindow( Display *dpy, GLXFBConfig config, Window win,
1904                       const int *attribList )
1905 {
1906    (void) dpy;
1907    (void) config;
1908    (void) win;
1909    (void) attribList;  /* Ignored in GLX 1.3 */
1910
1911    return win;  /* A hack for now */
1912 }
1913
1914
1915 static void
1916 Fake_glXDestroyWindow( Display *dpy, GLXWindow window )
1917 {
1918    XMesaBuffer b = XMesaFindBuffer(dpy, (XMesaDrawable) window);
1919    if (b)
1920       XMesaDestroyBuffer(b);
1921    /* don't destroy X window */
1922 }
1923
1924
1925 /* XXX untested */
1926 static GLXPixmap
1927 Fake_glXCreatePixmap( Display *dpy, GLXFBConfig config, Pixmap pixmap,
1928                       const int *attribList )
1929 {
1930    XMesaVisual v = (XMesaVisual) config;
1931    XVisualInfo *visinfo;
1932    XMesaBuffer b;
1933
1934    (void) dpy;
1935    (void) config;
1936    (void) pixmap;
1937    (void) attribList;  /* Ignored in GLX 1.3 */
1938
1939    if (!dpy || !config || !pixmap)
1940       return 0;
1941
1942    visinfo = v->vishandle;
1943
1944    v = find_glx_visual( dpy, visinfo );
1945    if (!v) {
1946       v = create_glx_visual( dpy, visinfo );
1947       if (!v) {
1948          /* unusable visual */
1949          return 0;
1950       }
1951    }
1952
1953    b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1954    if (!b) {
1955       return 0;
1956    }
1957
1958    return pixmap;
1959 }
1960
1961
1962 static void
1963 Fake_glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1964 {
1965    XMesaBuffer b = XMesaFindBuffer(dpy, (XMesaDrawable)pixmap);
1966    if (b)
1967       XMesaDestroyBuffer(b);
1968    /* don't destroy X pixmap */
1969 }
1970
1971
1972 static GLXPbuffer
1973 Fake_glXCreatePbuffer( Display *dpy, GLXFBConfig config,
1974                        const int *attribList )
1975 {
1976    const int *attrib;
1977    int width = 0, height = 0;
1978    GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
1979
1980    (void) dpy;
1981    (void) config;
1982
1983    for (attrib = attribList; attrib; attrib++) {
1984       switch (*attrib) {
1985          case GLX_PBUFFER_WIDTH:
1986             width = *(++attrib);
1987             break;
1988          case GLX_PBUFFER_HEIGHT:
1989             height = *(++attrib);
1990             break;
1991          case GLX_PRESERVED_CONTENTS:
1992             preserveContents = GL_TRUE; /* ignored */
1993             break;
1994          case GLX_LARGEST_PBUFFER:
1995             useLargest = GL_TRUE; /* ignored */
1996             break;
1997          default:
1998             return 0;
1999       }
2000    }
2001
2002    if (width == 0 || height == 0)
2003       return 0;
2004
2005
2006    return 0;
2007 }
2008
2009
2010 static void
2011 Fake_glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2012 {
2013    (void) dpy;
2014    (void) pbuf;
2015 }
2016
2017
2018 static void
2019 Fake_glXQueryDrawable( Display *dpy, GLXDrawable draw, int attribute,
2020                        unsigned int *value )
2021 {
2022    (void) dpy;
2023    (void) draw;
2024
2025    switch (attribute) {
2026       case GLX_WIDTH:
2027       case GLX_HEIGHT:
2028       case GLX_PRESERVED_CONTENTS:
2029       case GLX_LARGEST_PBUFFER:
2030       case GLX_FBCONFIG_ID:
2031          *value = 0;
2032          return;
2033       default:
2034          return;  /* GLX_BAD_ATTRIBUTE? */
2035    }
2036 }
2037
2038
2039 static GLXContext
2040 Fake_glXCreateNewContext( Display *dpy, GLXFBConfig config,
2041                           int renderType, GLXContext shareList, Bool direct )
2042 {
2043    XMesaVisual v = (XMesaVisual) config;
2044
2045    if (!dpy || !config ||
2046        (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2047       return 0;
2048
2049    return Fake_glXCreateContext(dpy, v->vishandle, shareList, direct);
2050 }
2051
2052
2053 static int
2054 Fake_glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2055 {
2056    (void) dpy;
2057    (void) ctx;
2058
2059    switch (attribute) {
2060    case GLX_FBCONFIG_ID:
2061    case GLX_RENDER_TYPE:
2062    case GLX_SCREEN:
2063       *value = 0;
2064       return Success;
2065    default:
2066       return GLX_BAD_ATTRIBUTE;
2067    }
2068 }
2069
2070
2071 static void
2072 Fake_glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2073 {
2074    (void) dpy;
2075    (void) drawable;
2076    (void) mask;
2077 }
2078
2079
2080 static void
2081 Fake_glXGetSelectedEvent( Display *dpy, GLXDrawable drawable,
2082                           unsigned long *mask )
2083 {
2084    (void) dpy;
2085    (void) drawable;
2086    (void) mask;
2087 }
2088
2089
2090
2091 /*** GLX_SGI_swap_control ***/
2092
2093 static int
2094 Fake_glXSwapIntervalSGI(int interval)
2095 {
2096    (void) interval;
2097    return 0;
2098 }
2099
2100
2101
2102 /*** GLX_SGI_video_sync ***/
2103
2104 static int
2105 Fake_glXGetVideoSyncSGI(unsigned int *count)
2106 {
2107    (void) count;
2108    return 0;
2109 }
2110
2111 static int
2112 Fake_glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2113 {
2114    (void) divisor;
2115    (void) remainder;
2116    (void) count;
2117    return 0;
2118 }
2119
2120
2121
2122 /*** GLX_SGI_make_current_read ***/
2123
2124 static Bool
2125 Fake_glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
2126 {
2127    (void) dpy;
2128    (void) draw;
2129    (void) read;
2130    (void) ctx;
2131    return False;
2132 }
2133
2134 /* not used
2135 static GLXDrawable
2136 Fake_glXGetCurrentReadDrawableSGI(void)
2137 {
2138    return 0;
2139 }
2140 */
2141
2142
2143 /*** GLX_SGIX_video_source ***/
2144 #if defined(_VL_H)
2145
2146 static GLXVideoSourceSGIX
2147 Fake_glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode)
2148 {
2149    (void) dpy;
2150    (void) screen;
2151    (void) server;
2152    (void) path;
2153    (void) nodeClass;
2154    (void) drainNode;
2155    return 0;
2156 }
2157
2158 static void
2159 Fake_glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2160 {
2161    (void) dpy;
2162    (void) src;
2163 }
2164
2165 #endif
2166
2167
2168 /*** GLX_EXT_import_context ***/
2169
2170 static void
2171 Fake_glXFreeContextEXT(Display *dpy, GLXContext context)
2172 {
2173    (void) dpy;
2174    (void) context;
2175 }
2176
2177 static GLXContextID
2178 Fake_glXGetContextIDEXT(const GLXContext context)
2179 {
2180    (void) context;
2181    return 0;
2182 }
2183
2184 static GLXContext
2185 Fake_glXImportContextEXT(Display *dpy, GLXContextID contextID)
2186 {
2187    (void) dpy;
2188    (void) contextID;
2189    return 0;
2190 }
2191
2192 static int
2193 Fake_glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute, int *value)
2194 {
2195    (void) dpy;
2196    (void) context;
2197    (void) attribute;
2198    (void) value;
2199    return 0;
2200 }
2201
2202
2203
2204 /*** GLX_SGIX_fbconfig ***/
2205
2206 static int
2207 Fake_glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config, int attribute, int *value)
2208 {
2209    (void) dpy;
2210    (void) config;
2211    (void) attribute;
2212    (void) value;
2213    return 0;
2214 }
2215
2216 static GLXFBConfigSGIX *
2217 Fake_glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list, int *nelements)
2218 {
2219    (void) dpy;
2220    (void) screen;
2221    (void) attrib_list;
2222    (void) nelements;
2223    return 0;
2224 }
2225
2226 static GLXPixmap
2227 Fake_glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap)
2228 {
2229    (void) dpy;
2230    (void) config;
2231    (void) pixmap;
2232    return 0;
2233 }
2234
2235 static GLXContext
2236 Fake_glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct)
2237 {
2238    (void) dpy;
2239    (void) config;
2240    (void) render_type;
2241    (void) share_list;
2242    (void) direct;
2243    return 0;
2244 }
2245
2246 static XVisualInfo *
2247 Fake_glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2248 {
2249    (void) dpy;
2250    (void) config;
2251    return NULL;
2252 }
2253
2254 static GLXFBConfigSGIX
2255 Fake_glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2256 {
2257    (void) dpy;
2258    (void) vis;
2259    return 0;
2260 }
2261
2262
2263
2264 /*** GLX_SGIX_pbuffer ***/
2265
2266 static GLXPbufferSGIX
2267 Fake_glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config, unsigned int width, unsigned int height, int *attrib_list)
2268 {
2269    (void) dpy;
2270    (void) config;
2271    (void) width;
2272    (void) height;
2273    (void) attrib_list;
2274    return 0;
2275 }
2276
2277 static void
2278 Fake_glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2279 {
2280    (void) dpy;
2281    (void) pbuf;
2282 }
2283
2284 static int
2285 Fake_glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value)
2286 {
2287    (void) dpy;
2288    (void) pbuf;
2289    (void) attribute;
2290    (void) value;
2291    return 0;
2292 }
2293
2294 static void
2295 Fake_glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2296 {
2297    (void) dpy;
2298    (void) drawable;
2299    (void) mask;
2300 }
2301
2302 static void
2303 Fake_glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2304 {
2305    (void) dpy;
2306    (void) drawable;
2307    (void) mask;
2308 }
2309
2310
2311
2312 /*** GLX_SGI_cushion ***/
2313
2314 static void
2315 Fake_glXCushionSGI(Display *dpy, Window win, float cushion)
2316 {
2317    (void) dpy;
2318    (void) win;
2319    (void) cushion;
2320 }
2321
2322
2323
2324 /*** GLX_SGIX_video_resize ***/
2325
2326 static int
2327 Fake_glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel , Window window)
2328 {
2329    (void) dpy;
2330    (void) screen;
2331    (void) channel;
2332    (void) window;
2333    return 0;
2334 }
2335
2336 static int
2337 Fake_glXChannelRectSGIX(Display *dpy, int screen, int channel, int x, int y, int w, int h)
2338 {
2339    (void) dpy;
2340    (void) screen;
2341    (void) channel;
2342    (void) x;
2343    (void) y;
2344    (void) w;
2345    (void) h;
2346    return 0;
2347 }
2348
2349 static int
2350 Fake_glXQueryChannelRectSGIX(Display *dpy, int screen, int channel, int *x, int *y, int *w, int *h)
2351 {
2352    (void) dpy;
2353    (void) screen;
2354    (void) channel;
2355    (void) x;
2356    (void) y;
2357    (void) w;
2358    (void) h;
2359    return 0;
2360 }
2361
2362 static int
2363 Fake_glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel, int *dx, int *dy, int *dw, int *dh)
2364 {
2365    (void) dpy;
2366    (void) screen;
2367    (void) channel;
2368    (void) dx;
2369    (void) dy;
2370    (void) dw;
2371    (void) dh;
2372    return 0;
2373 }
2374
2375 static int
2376 Fake_glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2377 {
2378    (void) dpy;
2379    (void) screen;
2380    (void) channel;
2381    (void) synctype;
2382    return 0;
2383 }
2384
2385
2386
2387 /*** GLX_SGIX_dmbuffer **/
2388
2389 #if defined(_DM_BUFFER_H_)
2390 static Bool
2391 Fake_glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer)
2392 {
2393    (void) dpy;
2394    (void) pbuffer;
2395    (void) params;
2396    (void) dmbuffer;
2397    return False;
2398 }
2399 #endif
2400
2401
2402 /*** GLX_SGIX_swap_group ***/
2403
2404 static void
2405 Fake_glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2406 {
2407    (void) dpy;
2408    (void) drawable;
2409    (void) member;
2410 }
2411
2412
2413
2414 /*** GLX_SGIX_swap_barrier ***/
2415
2416 static void
2417 Fake_glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2418 {
2419    (void) dpy;
2420    (void) drawable;
2421    (void) barrier;
2422 }
2423
2424 static Bool
2425 Fake_glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2426 {
2427    (void) dpy;
2428    (void) screen;
2429    (void) max;
2430    return False;
2431 }
2432
2433
2434
2435 /*** GLX_SUN_get_transparent_index ***/
2436
2437 static Status
2438 Fake_glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay, long *pTransparent)
2439 {
2440    (void) dpy;
2441    (void) overlay;
2442    (void) underlay;
2443    (void) pTransparent;
2444    return 0;
2445 }
2446
2447
2448
2449 /*** GLX_MESA_release_buffers ***/
2450
2451 /*
2452  * Release the depth, stencil, accum buffers attached to a GLXDrawable
2453  * (a window or pixmap) prior to destroying the GLXDrawable.
2454  */
2455 static Bool
2456 Fake_glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2457 {
2458    XMesaBuffer b = XMesaFindBuffer(dpy, d);
2459    if (b) {
2460       XMesaDestroyBuffer(b);
2461       return True;
2462    }
2463    return False;
2464 }
2465
2466
2467
2468 /*** GLX_MESA_set_3dfx_mode ***/
2469
2470 static Bool
2471 Fake_glXSet3DfxModeMESA( int mode )
2472 {
2473    return XMesaSetFXmode( mode );
2474 }
2475
2476
2477
2478
2479 extern struct _glxapi_table *_mesa_GetGLXDispatchTable(void);
2480 struct _glxapi_table *_mesa_GetGLXDispatchTable(void)
2481 {
2482    static struct _glxapi_table glx;
2483
2484    /* be sure our dispatch table size <= libGL's table */
2485    {
2486       GLuint size = sizeof(struct _glxapi_table) / sizeof(void *);
2487       (void) size;
2488       assert(_glxapi_get_dispatch_table_size() >= size);
2489    }
2490
2491    /* initialize the whole table to no-ops */
2492    _glxapi_set_no_op_table(&glx);
2493
2494    /* now initialize the table with the functions I implement */
2495    glx.ChooseVisual = Fake_glXChooseVisual;
2496    glx.CopyContext = Fake_glXCopyContext;
2497    glx.CreateContext = Fake_glXCreateContext;
2498    glx.CreateGLXPixmap = Fake_glXCreateGLXPixmap;
2499    glx.DestroyContext = Fake_glXDestroyContext;
2500    glx.DestroyGLXPixmap = Fake_glXDestroyGLXPixmap;
2501    glx.GetConfig = Fake_glXGetConfig;
2502    /*glx.GetCurrentContext = Fake_glXGetCurrentContext;*/
2503    /*glx.GetCurrentDrawable = Fake_glXGetCurrentDrawable;*/
2504    glx.IsDirect = Fake_glXIsDirect;
2505    glx.MakeCurrent = Fake_glXMakeCurrent;
2506    glx.QueryExtension = Fake_glXQueryExtension;
2507    glx.QueryVersion = Fake_glXQueryVersion;
2508    glx.SwapBuffers = Fake_glXSwapBuffers;
2509    glx.UseXFont = Fake_glXUseXFont;
2510    glx.WaitGL = Fake_glXWaitGL;
2511    glx.WaitX = Fake_glXWaitX;
2512
2513    /*** GLX_VERSION_1_1 ***/
2514    glx.GetClientString = Fake_glXGetClientString;
2515    glx.QueryExtensionsString = Fake_glXQueryExtensionsString;
2516    glx.QueryServerString = Fake_glXQueryServerString;
2517
2518    /*** GLX_VERSION_1_2 ***/
2519    /*glx.GetCurrentDisplay = Fake_glXGetCurrentDisplay;*/
2520
2521    /*** GLX_VERSION_1_3 ***/
2522    glx.ChooseFBConfig = Fake_glXChooseFBConfig;
2523    glx.CreateNewContext = Fake_glXCreateNewContext;
2524    glx.CreatePbuffer = Fake_glXCreatePbuffer;
2525    glx.CreatePixmap = Fake_glXCreatePixmap;
2526    glx.CreateWindow = Fake_glXCreateWindow;
2527    glx.DestroyPbuffer = Fake_glXDestroyPbuffer;
2528    glx.DestroyPixmap = Fake_glXDestroyPixmap;
2529    glx.DestroyWindow = Fake_glXDestroyWindow;
2530    /*glx.GetCurrentReadDrawable = Fake_glXGetCurrentReadDrawable;*/
2531    glx.GetFBConfigAttrib = Fake_glXGetFBConfigAttrib;
2532    glx.GetFBConfigs = Fake_glXGetFBConfigs;
2533    glx.GetSelectedEvent = Fake_glXGetSelectedEvent;
2534    glx.GetVisualFromFBConfig = Fake_glXGetVisualFromFBConfig;
2535    glx.MakeContextCurrent = Fake_glXMakeContextCurrent;
2536    glx.QueryContext = Fake_glXQueryContext;
2537    glx.QueryDrawable = Fake_glXQueryDrawable;
2538    glx.SelectEvent = Fake_glXSelectEvent;
2539
2540    /*** GLX_SGI_swap_control ***/
2541    glx.SwapIntervalSGI = Fake_glXSwapIntervalSGI;
2542
2543    /*** GLX_SGI_video_sync ***/
2544    glx.GetVideoSyncSGI = Fake_glXGetVideoSyncSGI;
2545    glx.WaitVideoSyncSGI = Fake_glXWaitVideoSyncSGI;
2546
2547    /*** GLX_SGI_make_current_read ***/
2548    glx.MakeCurrentReadSGI = Fake_glXMakeCurrentReadSGI;
2549    /*glx.GetCurrentReadDrawableSGI = Fake_glXGetCurrentReadDrawableSGI;*/
2550
2551 /*** GLX_SGIX_video_source ***/
2552 #if defined(_VL_H)
2553    glx.CreateGLXVideoSourceSGIX = Fake_glXCreateGLXVideoSourceSGIX;
2554    glx.DestroyGLXVideoSourceSGIX = Fake_glXDestroyGLXVideoSourceSGIX;
2555 #endif
2556
2557    /*** GLX_EXT_import_context ***/
2558    glx.FreeContextEXT = Fake_glXFreeContextEXT;
2559    glx.GetContextIDEXT = Fake_glXGetContextIDEXT;
2560    /*glx.GetCurrentDisplayEXT = Fake_glXGetCurrentDisplayEXT;*/
2561    glx.ImportContextEXT = Fake_glXImportContextEXT;
2562    glx.QueryContextInfoEXT = Fake_glXQueryContextInfoEXT;
2563
2564    /*** GLX_SGIX_fbconfig ***/
2565    glx.GetFBConfigAttribSGIX = Fake_glXGetFBConfigAttribSGIX;
2566    glx.ChooseFBConfigSGIX = Fake_glXChooseFBConfigSGIX;
2567    glx.CreateGLXPixmapWithConfigSGIX = Fake_glXCreateGLXPixmapWithConfigSGIX;
2568    glx.CreateContextWithConfigSGIX = Fake_glXCreateContextWithConfigSGIX;
2569    glx.GetVisualFromFBConfigSGIX = Fake_glXGetVisualFromFBConfigSGIX;
2570    glx.GetFBConfigFromVisualSGIX = Fake_glXGetFBConfigFromVisualSGIX;
2571
2572    /*** GLX_SGIX_pbuffer ***/
2573    glx.CreateGLXPbufferSGIX = Fake_glXCreateGLXPbufferSGIX;
2574    glx.DestroyGLXPbufferSGIX = Fake_glXDestroyGLXPbufferSGIX;
2575    glx.QueryGLXPbufferSGIX = Fake_glXQueryGLXPbufferSGIX;
2576    glx.SelectEventSGIX = Fake_glXSelectEventSGIX;
2577    glx.GetSelectedEventSGIX = Fake_glXGetSelectedEventSGIX;
2578
2579    /*** GLX_SGI_cushion ***/
2580    glx.CushionSGI = Fake_glXCushionSGI;
2581
2582    /*** GLX_SGIX_video_resize ***/
2583    glx.BindChannelToWindowSGIX = Fake_glXBindChannelToWindowSGIX;
2584    glx.ChannelRectSGIX = Fake_glXChannelRectSGIX;
2585    glx.QueryChannelRectSGIX = Fake_glXQueryChannelRectSGIX;
2586    glx.QueryChannelDeltasSGIX = Fake_glXQueryChannelDeltasSGIX;
2587    glx.ChannelRectSyncSGIX = Fake_glXChannelRectSyncSGIX;
2588
2589    /*** GLX_SGIX_dmbuffer **/
2590 #if defined(_DM_BUFFER_H_)
2591    glx.AssociateDMPbufferSGIX = NULL;
2592 #endif
2593
2594    /*** GLX_SGIX_swap_group ***/
2595    glx.JoinSwapGroupSGIX = Fake_glXJoinSwapGroupSGIX;
2596
2597    /*** GLX_SGIX_swap_barrier ***/
2598    glx.BindSwapBarrierSGIX = Fake_glXBindSwapBarrierSGIX;
2599    glx.QueryMaxSwapBarriersSGIX = Fake_glXQueryMaxSwapBarriersSGIX;
2600
2601    /*** GLX_SUN_get_transparent_index ***/
2602    glx.GetTransparentIndexSUN = Fake_glXGetTransparentIndexSUN;
2603
2604    /*** GLX_MESA_copy_sub_buffer ***/
2605    glx.CopySubBufferMESA = Fake_glXCopySubBufferMESA;
2606
2607    /*** GLX_MESA_release_buffers ***/
2608    glx.ReleaseBuffersMESA = Fake_glXReleaseBuffersMESA;
2609
2610    /*** GLX_MESA_pixmap_colormap ***/
2611    glx.CreateGLXPixmapMESA = Fake_glXCreateGLXPixmapMESA;
2612
2613    /*** GLX_MESA_set_3dfx_mode ***/
2614    glx.Set3DfxModeMESA = Fake_glXSet3DfxModeMESA;
2615
2616    return &glx;
2617 }