src/mesa/main/context.c

   1 /* $Id: context.c,v 1.70 2000/05/26 14:44:59 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   6  *
   7  * Copyright (C) 1999-2000  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 #ifdef PC_HEADER
  29 #include "all.h"
  30 #else
  31 #include "glheader.h"
  32 #include "accum.h"
  33 #include "alphabuf.h"
  34 #include "clip.h"
  35 #include "colortab.h"
  36 #include "context.h"
  37 #include "cva.h"
  38 #include "depth.h"
  39 #include "dlist.h"
  40 #include "eval.h"
  41 #include "enums.h"
  42 #include "extensions.h"
  43 #include "fog.h"
  44 #include "get.h"
  45 #include "glapi.h"
  46 #include "glapinoop.h"
  47 #include "glthread.h"
  48 #include "hash.h"
  49 #include "light.h"
  50 #include "macros.h"
  51 #include "matrix.h"
  52 #include "mem.h"
  53 #include "mmath.h"
  54 #include "pb.h"
  55 #include "pipeline.h"
  56 #include "shade.h"
  57 #include "simple_list.h"
  58 #include "stencil.h"
  59 #include "stages.h"
  60 #include "state.h"
  61 #include "translate.h"
  62 #include "teximage.h"
  63 #include "texobj.h"
  64 #include "texstate.h"
  65 #include "texture.h"
  66 #include "types.h"
  67 #include "varray.h"
  68 #include "vb.h"
  69 #include "vbcull.h"
  70 #include "vbrender.h"
  71 #include "vbxform.h"
  72 #include "vertices.h"
  73 #include "xform.h"
  74 #endif
  75
  76
  77
  78 /**********************************************************************/
  79 /*****                  Context and Thread management             *****/
  80 /**********************************************************************/
  81
  82
  83 #if !defined(THREADS)
  84
  85 struct immediate *_mesa_CurrentInput = NULL;
  86
  87 #endif
  88
  89
  90 /**********************************************************************/
  91 /***** GL Visual allocation/destruction                           *****/
  92 /**********************************************************************/
  93
  94
  95 /*
  96  * Allocate a new GLvisual object.
  97  * Input:  rgbFlag - GL_TRUE=RGB(A) mode, GL_FALSE=Color Index mode
  98  *         dbFlag - double buffering?
  99  *         stereoFlag - stereo buffer?
 100  *         depthBits - requested bits per depth buffer value
 101  *                     Any value in [0, 32] is acceptable but the actual
 102  *                     depth type will be GLushort or GLuint as needed.
 103  *         stencilBits - requested minimum bits per stencil buffer value
 104  *         accumBits - requested minimum bits per accum buffer component
 105  *         indexBits - number of bits per pixel if rgbFlag==GL_FALSE
 106  *         red/green/blue/alphaBits - number of bits per color component
 107  *                                    in frame buffer for RGB(A) mode.
 108  *                                    We always use 8 in core Mesa though.
 109  * Return:  pointer to new GLvisual or NULL if requested parameters can't
 110  *          be met.
 111  */
 112 GLvisual *
 113 _mesa_create_visual( GLboolean rgbFlag,
 114                      GLboolean dbFlag,
 115                      GLboolean stereoFlag,
 116                      GLint redBits,
 117                      GLint greenBits,
 118                      GLint blueBits,
 119                      GLint alphaBits,
 120                      GLint indexBits,
 121                      GLint depthBits,
 122                      GLint stencilBits,
 123                      GLint accumRedBits,
 124                      GLint accumGreenBits,
 125                      GLint accumBlueBits,
 126                      GLint accumAlphaBits,
 127                      GLint numSamples )
 128 {
 129    GLvisual *vis = (GLvisual *) CALLOC( sizeof(GLvisual) );
 130    if (vis) {
 131       if (!_mesa_initialize_visual(vis, rgbFlag, dbFlag, stereoFlag,
 132                                    redBits, greenBits, blueBits, alphaBits,
 133                                    indexBits, depthBits, stencilBits,
 134                                    accumRedBits, accumGreenBits,
 135                                    accumBlueBits, accumAlphaBits,
 136                                    numSamples )) {
 137          FREE(vis);
 138          return NULL;
 139       }
 140    }
 141    return vis;
 142 }
 143
 144
 145 /*
 146  * Initialize the fields of the given GLvisual.
 147  * Input:  see _mesa_create_visual() above.
 148  * Return: GL_TRUE = success
 149  *         GL_FALSE = failure.
 150  */
 151 GLboolean
 152 _mesa_initialize_visual( GLvisual *vis,
 153                          GLboolean rgbFlag,
 154                          GLboolean dbFlag,
 155                          GLboolean stereoFlag,
 156                          GLint redBits,
 157                          GLint greenBits,
 158                          GLint blueBits,
 159                          GLint alphaBits,
 160                          GLint indexBits,
 161                          GLint depthBits,
 162                          GLint stencilBits,
 163                          GLint accumRedBits,
 164                          GLint accumGreenBits,
 165                          GLint accumBlueBits,
 166                          GLint accumAlphaBits,
 167                          GLint numSamples )
 168 {
 169    assert(vis);
 170
 171    /* This is to catch bad values from device drivers not updated for
 172     * Mesa 3.3.  Some device drivers just passed 1.  That's a REALLY
 173     * bad value now (a 1-bit depth buffer!?!).
 174     */
 175    assert(depthBits == 0 || depthBits > 1);
 176
 177    if (depthBits < 0 || depthBits > 32) {
 178       return GL_FALSE;
 179    }
 180    if (stencilBits < 0 || stencilBits > (GLint) (8 * sizeof(GLstencil))) {
 181       return GL_FALSE;
 182    }
 183    if (accumRedBits < 0 || accumRedBits > (GLint) (8 * sizeof(GLaccum))) {
 184       return GL_FALSE;
 185    }
 186    if (accumGreenBits < 0 || accumGreenBits > (GLint) (8 * sizeof(GLaccum))) {
 187       return GL_FALSE;
 188    }
 189    if (accumBlueBits < 0 || accumBlueBits > (GLint) (8 * sizeof(GLaccum))) {
 190       return GL_FALSE;
 191    }
 192    if (accumAlphaBits < 0 || accumAlphaBits > (GLint) (8 * sizeof(GLaccum))) {
 193       return GL_FALSE;
 194    }
 195
 196    vis->RGBAflag   = rgbFlag;
 197    vis->DBflag     = dbFlag;
 198    vis->StereoFlag = stereoFlag;
 199    vis->RedBits    = redBits;
 200    vis->GreenBits  = greenBits;
 201    vis->BlueBits   = blueBits;
 202    vis->AlphaBits  = alphaBits;
 203
 204    vis->IndexBits      = indexBits;
 205    vis->DepthBits      = depthBits;
 206    vis->AccumRedBits   = (accumRedBits > 0) ? (8 * sizeof(GLaccum)) : 0;
 207    vis->AccumGreenBits = (accumGreenBits > 0) ? (8 * sizeof(GLaccum)) : 0;
 208    vis->AccumBlueBits  = (accumBlueBits > 0) ? (8 * sizeof(GLaccum)) : 0;
 209    vis->AccumAlphaBits = (accumAlphaBits > 0) ? (8 * sizeof(GLaccum)) : 0;
 210    vis->StencilBits    = (stencilBits > 0) ? (8 * sizeof(GLstencil)) : 0;
 211
 212    if (depthBits == 0) {
 213       /* Special case.  Even if we don't have a depth buffer we need
 214        * good values for DepthMax for Z vertex transformation purposes.
 215        */
 216       vis->DepthMax = 1;
 217       vis->DepthMaxF = 1.0F;
 218    }
 219    else if (depthBits < 32) {
 220       vis->DepthMax = (1 << depthBits) - 1;
 221       vis->DepthMaxF = (GLfloat) vis->DepthMax;
 222    }
 223    else {
 224       /* Special case since shift values greater than or equal to the
 225        * number of bits in the left hand expression's type are
 226        * undefined.
 227        */
 228       vis->DepthMax = 0xffffffff;
 229       vis->DepthMaxF = (GLfloat) vis->DepthMax;
 230    }
 231
 232    return GL_TRUE;
 233 }
 234
 235
 236 /* This function should no longer be used. Use _mesa_create_visual() instead */
 237 GLvisual *
 238 gl_create_visual( GLboolean rgbFlag,
 239                   GLboolean alphaFlag,
 240                   GLboolean dbFlag,
 241                   GLboolean stereoFlag,
 242                   GLint depthBits,
 243                   GLint stencilBits,
 244                   GLint accumBits,
 245                   GLint indexBits,
 246                   GLint redBits,
 247                   GLint greenBits,
 248                   GLint blueBits,
 249                   GLint alphaBits )
 250 {
 251    (void) alphaFlag;
 252    return _mesa_create_visual(rgbFlag, dbFlag, stereoFlag,
 253                               redBits, greenBits, blueBits, alphaBits,
 254                               indexBits, depthBits, stencilBits,
 255                               accumBits, accumBits, accumBits, accumBits, 0);
 256 }
 257
 258
 259 void
 260 _mesa_destroy_visual( GLvisual *vis )
 261 {
 262    FREE(vis);
 263 }
 264
 265
 266 /* obsolete */
 267 void
 268 gl_destroy_visual( GLvisual *vis )
 269 {
 270    _mesa_destroy_visual(vis);
 271 }
 272
 273
 274
 275 /**********************************************************************/
 276 /***** GL Framebuffer allocation/destruction                      *****/
 277 /**********************************************************************/
 278
 279
 280 /*
 281  * Create a new framebuffer.  A GLframebuffer is a struct which
 282  * encapsulates the depth, stencil and accum buffers and related
 283  * parameters.
 284  * Input:  visual - a GLvisual pointer
 285  *         softwareDepth - create/use a software depth buffer?
 286  *         softwareStencil - create/use a software stencil buffer?
 287  *         softwareAccum - create/use a software accum buffer?
 288  *         softwareAlpha - create/use a software alpha buffer?
 289
 290  * Return:  pointer to new GLframebuffer struct or NULL if error.
 291  */
 292 GLframebuffer *
 293 gl_create_framebuffer( GLvisual *visual,
 294                        GLboolean softwareDepth,
 295                        GLboolean softwareStencil,
 296                        GLboolean softwareAccum,
 297                        GLboolean softwareAlpha )
 298 {
 299    GLframebuffer *buffer = CALLOC_STRUCT(gl_frame_buffer);
 300    assert(visual);
 301    if (buffer) {
 302       _mesa_initialize_framebuffer(buffer, visual,
 303                                    softwareDepth, softwareStencil,
 304                                    softwareAccum, softwareAlpha );
 305    }
 306    return buffer;
 307 }
 308
 309
 310 /*
 311  * Initialize a GLframebuffer object.
 312  * Input:  See gl_create_framebuffer() above.
 313  */
 314 void
 315 _mesa_initialize_framebuffer( GLframebuffer *buffer,
 316                               GLvisual *visual,
 317                               GLboolean softwareDepth,
 318                               GLboolean softwareStencil,
 319                               GLboolean softwareAccum,
 320                               GLboolean softwareAlpha )
 321 {
 322    assert(buffer);
 323    assert(visual);
 324
 325    /* sanity checks */
 326    if (softwareDepth ) {
 327       assert(visual->DepthBits > 0);
 328    }
 329    if (softwareStencil) {
 330       assert(visual->StencilBits > 0);
 331    }
 332    if (softwareAccum) {
 333       assert(visual->RGBAflag);
 334       assert(visual->AccumRedBits > 0);
 335       assert(visual->AccumGreenBits > 0);
 336       assert(visual->AccumBlueBits > 0);
 337    }
 338    if (softwareAlpha) {
 339       assert(visual->RGBAflag);
 340       assert(visual->AlphaBits > 0);
 341    }
 342
 343    buffer->Visual = visual;
 344    buffer->UseSoftwareDepthBuffer = softwareDepth;
 345    buffer->UseSoftwareStencilBuffer = softwareStencil;
 346    buffer->UseSoftwareAccumBuffer = softwareAccum;
 347    buffer->UseSoftwareAlphaBuffers = softwareAlpha;
 348 }
 349
 350
 351 /*
 352  * Free a framebuffer struct and its buffers.
 353  */
 354 void
 355 gl_destroy_framebuffer( GLframebuffer *buffer )
 356 {
 357    if (buffer) {
 358       if (buffer->DepthBuffer) {
 359          FREE( buffer->DepthBuffer );
 360       }
 361       if (buffer->Accum) {
 362          FREE( buffer->Accum );
 363       }
 364       if (buffer->Stencil) {
 365          FREE( buffer->Stencil );
 366       }
 367       if (buffer->FrontLeftAlpha) {
 368          FREE( buffer->FrontLeftAlpha );
 369       }
 370       if (buffer->BackLeftAlpha) {
 371          FREE( buffer->BackLeftAlpha );
 372       }
 373       if (buffer->FrontRightAlpha) {
 374          FREE( buffer->FrontRightAlpha );
 375       }
 376       if (buffer->BackRightAlpha) {
 377          FREE( buffer->BackRightAlpha );
 378       }
 379       FREE(buffer);
 380    }
 381 }
 382
 383
 384
 385 /**********************************************************************/
 386 /*****       Context allocation, initialization, destroying       *****/
 387 /**********************************************************************/
 388
 389
 390 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock);
 391
 392
 393 /*
 394  * This function just calls all the various one-time-init functions in Mesa.
 395  */
 396 static void
 397 one_time_init( void )
 398 {
 399    static GLboolean alreadyCalled = GL_FALSE;
 400    _glthread_LOCK_MUTEX(OneTimeLock);
 401    if (!alreadyCalled) {
 402       /* do some implementation tests */
 403       assert( sizeof(GLbyte) == 1 );
 404       assert( sizeof(GLshort) >= 2 );
 405       assert( sizeof(GLint) >= 4 );
 406       assert( sizeof(GLubyte) == 1 );
 407       assert( sizeof(GLushort) >= 2 );
 408       assert( sizeof(GLuint) >= 4 );
 409
 410       gl_init_clip();
 411       gl_init_eval();
 412       _mesa_init_fog();
 413       _mesa_init_math();
 414       gl_init_lists();
 415       gl_init_shade();
 416       gl_init_texture();
 417       gl_init_transformation();
 418       gl_init_translate();
 419       gl_init_vbrender();
 420       gl_init_vbxform();
 421       gl_init_vertices();
 422
 423       if (getenv("MESA_DEBUG")) {
 424          _glapi_noop_enable_warnings(GL_TRUE);
 425       }
 426       else {
 427          _glapi_noop_enable_warnings(GL_FALSE);
 428       }
 429
 430 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
 431    fprintf(stderr, "Mesa DEBUG build %s %s\n", __DATE__, __TIME__);
 432 #endif
 433
 434       alreadyCalled = GL_TRUE;
 435    }
 436    _glthread_UNLOCK_MUTEX(OneTimeLock);
 437 }
 438
 439
 440
 441 /*
 442  * Allocate and initialize a shared context state structure.
 443  */
 444 static struct gl_shared_state *
 445 alloc_shared_state( void )
 446 {
 447    GLuint d;
 448    struct gl_shared_state *ss;
 449    GLboolean outOfMemory;
 450
 451    ss = CALLOC_STRUCT(gl_shared_state);
 452    if (!ss)
 453       return NULL;
 454
 455    ss->DisplayList = _mesa_NewHashTable();
 456
 457    ss->TexObjects = _mesa_NewHashTable();
 458
 459    /* Default Texture objects */
 460    outOfMemory = GL_FALSE;
 461    for (d = 1 ; d <= 3 ; d++) {
 462       ss->DefaultD[d] = gl_alloc_texture_object(ss, 0, d);
 463       if (!ss->DefaultD[d]) {
 464          outOfMemory = GL_TRUE;
 465          break;
 466       }
 467       ss->DefaultD[d]->RefCount++; /* don't free if not in use */
 468    }
 469
 470    ss->DefaultCubeMap = gl_alloc_texture_object(ss, 0, 6);
 471    if (!ss->DefaultCubeMap) {
 472       outOfMemory = GL_TRUE;
 473    }
 474    else {
 475       ss->DefaultCubeMap->RefCount++;
 476    }
 477
 478    if (!ss->DisplayList || !ss->TexObjects || outOfMemory) {
 479       /* Ran out of memory at some point.  Free everything and return NULL */
 480       if (ss->DisplayList)
 481          _mesa_DeleteHashTable(ss->DisplayList);
 482       if (ss->TexObjects)
 483          _mesa_DeleteHashTable(ss->TexObjects);
 484       if (ss->DefaultD[1])
 485          gl_free_texture_object(ss, ss->DefaultD[1]);
 486       if (ss->DefaultD[2])
 487          gl_free_texture_object(ss, ss->DefaultD[2]);
 488       if (ss->DefaultD[3])
 489          gl_free_texture_object(ss, ss->DefaultD[3]);
 490       if (ss->DefaultCubeMap)
 491          gl_free_texture_object(ss, ss->DefaultCubeMap);
 492       FREE(ss);
 493       return NULL;
 494    }
 495    else {
 496       return ss;
 497    }
 498 }
 499
 500
 501 /*
 502  * Deallocate a shared state context and all children structures.
 503  */
 504 static void
 505 free_shared_state( GLcontext *ctx, struct gl_shared_state *ss )
 506 {
 507    /* Free display lists */
 508    while (1) {
 509       GLuint list = _mesa_HashFirstEntry(ss->DisplayList);
 510       if (list) {
 511          gl_destroy_list(ctx, list);
 512       }
 513       else {
 514          break;
 515       }
 516    }
 517    _mesa_DeleteHashTable(ss->DisplayList);
 518
 519    /* Free texture objects */
 520    while (ss->TexObjectList)
 521    {
 522       if (ctx->Driver.DeleteTexture)
 523          (*ctx->Driver.DeleteTexture)( ctx, ss->TexObjectList );
 524       /* this function removes from linked list too! */
 525       gl_free_texture_object(ss, ss->TexObjectList);
 526    }
 527    _mesa_DeleteHashTable(ss->TexObjects);
 528
 529    FREE(ss);
 530 }
 531
 532
 533
 534 /*
 535  * Initialize the nth light.  Note that the defaults for light 0 are
 536  * different than the other lights.
 537  */
 538 static void
 539 init_light( struct gl_light *l, GLuint n )
 540 {
 541    make_empty_list( l );
 542
 543    ASSIGN_4V( l->Ambient, 0.0, 0.0, 0.0, 1.0 );
 544    if (n==0) {
 545       ASSIGN_4V( l->Diffuse, 1.0, 1.0, 1.0, 1.0 );
 546       ASSIGN_4V( l->Specular, 1.0, 1.0, 1.0, 1.0 );
 547    }
 548    else {
 549       ASSIGN_4V( l->Diffuse, 0.0, 0.0, 0.0, 1.0 );
 550       ASSIGN_4V( l->Specular, 0.0, 0.0, 0.0, 1.0 );
 551    }
 552    ASSIGN_4V( l->EyePosition, 0.0, 0.0, 1.0, 0.0 );
 553    ASSIGN_3V( l->EyeDirection, 0.0, 0.0, -1.0 );
 554    l->SpotExponent = 0.0;
 555    gl_compute_spot_exp_table( l );
 556    l->SpotCutoff = 180.0;
 557    l->CosCutoff = 0.0;          /* KW: -ve values not admitted */
 558    l->ConstantAttenuation = 1.0;
 559    l->LinearAttenuation = 0.0;
 560    l->QuadraticAttenuation = 0.0;
 561    l->Enabled = GL_FALSE;
 562 }
 563
 564
 565
 566 static void
 567 init_lightmodel( struct gl_lightmodel *lm )
 568 {
 569    ASSIGN_4V( lm->Ambient, 0.2, 0.2, 0.2, 1.0 );
 570    lm->LocalViewer = GL_FALSE;
 571    lm->TwoSide = GL_FALSE;
 572    lm->ColorControl = GL_SINGLE_COLOR;
 573 }
 574
 575
 576 static void
 577 init_material( struct gl_material *m )
 578 {
 579    ASSIGN_4V( m->Ambient,  0.2, 0.2, 0.2, 1.0 );
 580    ASSIGN_4V( m->Diffuse,  0.8, 0.8, 0.8, 1.0 );
 581    ASSIGN_4V( m->Specular, 0.0, 0.0, 0.0, 1.0 );
 582    ASSIGN_4V( m->Emission, 0.0, 0.0, 0.0, 1.0 );
 583    m->Shininess = 0.0;
 584    m->AmbientIndex = 0;
 585    m->DiffuseIndex = 1;
 586    m->SpecularIndex = 1;
 587 }
 588
 589
 590
 591 static void
 592 init_texture_unit( GLcontext *ctx, GLuint unit )
 593 {
 594    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
 595
 596    texUnit->EnvMode = GL_MODULATE;
 597    ASSIGN_4V( texUnit->EnvColor, 0.0, 0.0, 0.0, 0.0 );
 598    texUnit->TexGenEnabled = 0;
 599    texUnit->GenModeS = GL_EYE_LINEAR;
 600    texUnit->GenModeT = GL_EYE_LINEAR;
 601    texUnit->GenModeR = GL_EYE_LINEAR;
 602    texUnit->GenModeQ = GL_EYE_LINEAR;
 603    /* Yes, these plane coefficients are correct! */
 604    ASSIGN_4V( texUnit->ObjectPlaneS, 1.0, 0.0, 0.0, 0.0 );
 605    ASSIGN_4V( texUnit->ObjectPlaneT, 0.0, 1.0, 0.0, 0.0 );
 606    ASSIGN_4V( texUnit->ObjectPlaneR, 0.0, 0.0, 0.0, 0.0 );
 607    ASSIGN_4V( texUnit->ObjectPlaneQ, 0.0, 0.0, 0.0, 0.0 );
 608    ASSIGN_4V( texUnit->EyePlaneS, 1.0, 0.0, 0.0, 0.0 );
 609    ASSIGN_4V( texUnit->EyePlaneT, 0.0, 1.0, 0.0, 0.0 );
 610    ASSIGN_4V( texUnit->EyePlaneR, 0.0, 0.0, 0.0, 0.0 );
 611    ASSIGN_4V( texUnit->EyePlaneQ, 0.0, 0.0, 0.0, 0.0 );
 612
 613    texUnit->CurrentD[1] = ctx->Shared->DefaultD[1];
 614    texUnit->CurrentD[2] = ctx->Shared->DefaultD[2];
 615    texUnit->CurrentD[3] = ctx->Shared->DefaultD[3];
 616    texUnit->CurrentCubeMap = ctx->Shared->DefaultCubeMap;
 617 }
 618
 619
 620 static void
 621 init_fallback_arrays( GLcontext *ctx )
 622 {
 623    struct gl_client_array *cl;
 624    GLuint i;
 625
 626    cl = &ctx->Fallback.Normal;
 627    cl->Size = 3;
 628    cl->Type = GL_FLOAT;
 629    cl->Stride = 0;
 630    cl->StrideB = 0;
 631    cl->Ptr = (void *) ctx->Current.Normal;
 632    cl->Enabled = 1;
 633
 634    cl = &ctx->Fallback.Color;
 635    cl->Size = 4;
 636    cl->Type = GL_UNSIGNED_BYTE;
 637    cl->Stride = 0;
 638    cl->StrideB = 0;
 639    cl->Ptr = (void *) ctx->Current.ByteColor;
 640    cl->Enabled = 1;
 641
 642    cl = &ctx->Fallback.Index;
 643    cl->Size = 1;
 644    cl->Type = GL_UNSIGNED_INT;
 645    cl->Stride = 0;
 646    cl->StrideB = 0;
 647    cl->Ptr = (void *) &ctx->Current.Index;
 648    cl->Enabled = 1;
 649
 650    for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++) {
 651       cl = &ctx->Fallback.TexCoord[i];
 652       cl->Size = 4;
 653       cl->Type = GL_FLOAT;
 654       cl->Stride = 0;
 655       cl->StrideB = 0;
 656       cl->Ptr = (void *) ctx->Current.Texcoord[i];
 657       cl->Enabled = 1;
 658    }
 659
 660    cl = &ctx->Fallback.EdgeFlag;
 661    cl->Size = 1;
 662    cl->Type = GL_UNSIGNED_BYTE;
 663    cl->Stride = 0;
 664    cl->StrideB = 0;
 665    cl->Ptr = (void *) &ctx->Current.EdgeFlag;
 666    cl->Enabled = 1;
 667 }
 668
 669
 670 /* Initialize a 1-D evaluator map */
 671 static void
 672 init_1d_map( struct gl_1d_map *map, int n, const float *initial )
 673 {
 674    map->Order = 1;
 675    map->u1 = 0.0;
 676    map->u2 = 1.0;
 677    map->Points = (GLfloat *) MALLOC(n * sizeof(GLfloat));
 678    if (map->Points) {
 679       GLint i;
 680       for (i=0;i<n;i++)
 681          map->Points[i] = initial[i];
 682    }
 683 }
 684
 685
 686 /* Initialize a 2-D evaluator map */
 687 static void
 688 init_2d_map( struct gl_2d_map *map, int n, const float *initial )
 689 {
 690    map->Uorder = 1;
 691    map->Vorder = 1;
 692    map->u1 = 0.0;
 693    map->u2 = 1.0;
 694    map->v1 = 0.0;
 695    map->v2 = 1.0;
 696    map->Points = (GLfloat *) MALLOC(n * sizeof(GLfloat));
 697    if (map->Points) {
 698       GLint i;
 699       for (i=0;i<n;i++)
 700          map->Points[i] = initial[i];
 701    }
 702 }
 703
 704
 705 /*
 706  * Initialize the attribute groups in a GLcontext.
 707  */
 708 static void
 709 init_attrib_groups( GLcontext *ctx )
 710 {
 711    GLuint i, j;
 712
 713    assert(ctx);
 714
 715    /* Constants, may be overriden by device drivers */
 716    ctx->Const.MaxTextureLevels = MAX_TEXTURE_LEVELS;
 717    ctx->Const.MaxTextureSize = 1 << (MAX_TEXTURE_LEVELS - 1);
 718    ctx->Const.MaxCubeTextureSize = ctx->Const.MaxTextureSize;
 719    ctx->Const.MaxTextureUnits = MAX_TEXTURE_UNITS;
 720    ctx->Const.MaxArrayLockSize = MAX_ARRAY_LOCK_SIZE;
 721    ctx->Const.SubPixelBits = SUB_PIXEL_BITS;
 722    ctx->Const.MinPointSize = MIN_POINT_SIZE;
 723    ctx->Const.MaxPointSize = MAX_POINT_SIZE;
 724    ctx->Const.MinPointSizeAA = MIN_POINT_SIZE;
 725    ctx->Const.MaxPointSizeAA = MAX_POINT_SIZE;
 726    ctx->Const.PointSizeGranularity = POINT_SIZE_GRANULARITY;
 727    ctx->Const.MinLineWidth = MIN_LINE_WIDTH;
 728    ctx->Const.MaxLineWidth = MAX_LINE_WIDTH;
 729    ctx->Const.MinLineWidthAA = MIN_LINE_WIDTH;
 730    ctx->Const.MaxLineWidthAA = MAX_LINE_WIDTH;
 731    ctx->Const.LineWidthGranularity = LINE_WIDTH_GRANULARITY;
 732    ctx->Const.NumAuxBuffers = NUM_AUX_BUFFERS;
 733    ctx->Const.MaxColorTableSize = MAX_COLOR_TABLE_SIZE;
 734    ctx->Const.MaxConvolutionWidth = MAX_CONVOLUTION_WIDTH;
 735    ctx->Const.MaxConvolutionHeight = MAX_CONVOLUTION_HEIGHT;
 736    ctx->Const.NumCompressedTextureFormats = 0;
 737
 738    /* Modelview matrix */
 739    gl_matrix_ctr( &ctx->ModelView );
 740    gl_matrix_alloc_inv( &ctx->ModelView );
 741
 742    ctx->ModelViewStackDepth = 0;
 743    for (i = 0; i < MAX_MODELVIEW_STACK_DEPTH - 1; i++) {
 744       gl_matrix_ctr( &ctx->ModelViewStack[i] );
 745       gl_matrix_alloc_inv( &ctx->ModelViewStack[i] );
 746    }
 747
 748    /* Projection matrix - need inv for user clipping in clip space*/
 749    gl_matrix_ctr( &ctx->ProjectionMatrix );
 750    gl_matrix_alloc_inv( &ctx->ProjectionMatrix );
 751
 752    gl_matrix_ctr( &ctx->ModelProjectMatrix );
 753    gl_matrix_ctr( &ctx->ModelProjectWinMatrix );
 754    ctx->ModelProjectWinMatrixUptodate = GL_FALSE;
 755
 756    ctx->ProjectionStackDepth = 0;
 757    ctx->NearFarStack[0][0] = 1.0; /* These values seem weird by make */
 758    ctx->NearFarStack[0][1] = 0.0; /* sense mathematically. */
 759
 760    for (i = 0; i < MAX_PROJECTION_STACK_DEPTH - 1; i++) {
 761       gl_matrix_ctr( &ctx->ProjectionStack[i] );
 762       gl_matrix_alloc_inv( &ctx->ProjectionStack[i] );
 763    }
 764
 765    /* Texture matrix */
 766    for (i=0; i<MAX_TEXTURE_UNITS; i++) {
 767       gl_matrix_ctr( &ctx->TextureMatrix[i] );
 768       ctx->TextureStackDepth[i] = 0;
 769       for (j = 0; j < MAX_TEXTURE_STACK_DEPTH - 1; j++) {
 770          ctx->TextureStack[i][j].inv = 0;
 771       }
 772    }
 773
 774    /* Color matrix */
 775    gl_matrix_ctr(&ctx->ColorMatrix);
 776    ctx->ColorStackDepth = 0;
 777    for (j = 0; j < MAX_COLOR_STACK_DEPTH - 1; j++) {
 778       gl_matrix_ctr(&ctx->ColorStack[j]);
 779    }
 780
 781    /* Accumulate buffer group */
 782    ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 783
 784    /* Color buffer group */
 785    ctx->Color.IndexMask = 0xffffffff;
 786    ctx->Color.ColorMask[0] = 0xff;
 787    ctx->Color.ColorMask[1] = 0xff;
 788    ctx->Color.ColorMask[2] = 0xff;
 789    ctx->Color.ColorMask[3] = 0xff;
 790    ctx->Color.SWmasking = GL_FALSE;
 791    ctx->Color.ClearIndex = 0;
 792    ASSIGN_4V( ctx->Color.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 793    ctx->Color.DrawBuffer = GL_FRONT;
 794    ctx->Color.AlphaEnabled = GL_FALSE;
 795    ctx->Color.AlphaFunc = GL_ALWAYS;
 796    ctx->Color.AlphaRef = 0;
 797    ctx->Color.BlendEnabled = GL_FALSE;
 798    ctx->Color.BlendSrcRGB = GL_ONE;
 799    ctx->Color.BlendDstRGB = GL_ZERO;
 800    ctx->Color.BlendSrcA = GL_ONE;
 801    ctx->Color.BlendDstA = GL_ZERO;
 802    ctx->Color.BlendEquation = GL_FUNC_ADD_EXT;
 803    ctx->Color.BlendFunc = NULL;  /* this pointer set only when needed */
 804    ASSIGN_4V( ctx->Color.BlendColor, 0.0, 0.0, 0.0, 0.0 );
 805    ctx->Color.IndexLogicOpEnabled = GL_FALSE;
 806    ctx->Color.ColorLogicOpEnabled = GL_FALSE;
 807    ctx->Color.SWLogicOpEnabled = GL_FALSE;
 808    ctx->Color.LogicOp = GL_COPY;
 809    ctx->Color.DitherFlag = GL_TRUE;
 810    ctx->Color.MultiDrawBuffer = GL_FALSE;
 811
 812    /* Current group */
 813    ASSIGN_4V( ctx->Current.ByteColor, 255, 255, 255, 255);
 814    ctx->Current.Index = 1;
 815    for (i=0; i<MAX_TEXTURE_UNITS; i++)
 816       ASSIGN_4V( ctx->Current.Texcoord[i], 0.0, 0.0, 0.0, 1.0 );
 817    ASSIGN_4V( ctx->Current.RasterPos, 0.0, 0.0, 0.0, 1.0 );
 818    ctx->Current.RasterDistance = 0.0;
 819    ASSIGN_4V( ctx->Current.RasterColor, 1.0, 1.0, 1.0, 1.0 );
 820    ctx->Current.RasterIndex = 1;
 821    for (i=0; i<MAX_TEXTURE_UNITS; i++)
 822       ASSIGN_4V( ctx->Current.RasterMultiTexCoord[i], 0.0, 0.0, 0.0, 1.0 );
 823    ctx->Current.RasterTexCoord = ctx->Current.RasterMultiTexCoord[0];
 824    ctx->Current.RasterPosValid = GL_TRUE;
 825    ctx->Current.EdgeFlag = GL_TRUE;
 826    ASSIGN_3V( ctx->Current.Normal, 0.0, 0.0, 1.0 );
 827    ctx->Current.Primitive = (GLenum) (GL_POLYGON + 1);
 828
 829    ctx->Current.Flag = (VERT_NORM|VERT_INDEX|VERT_RGBA|VERT_EDGE|
 830                         VERT_TEX0_1|VERT_TEX1_1|VERT_MATERIAL);
 831
 832    init_fallback_arrays( ctx );
 833
 834    /* Depth buffer group */
 835    ctx->Depth.Test = GL_FALSE;
 836    ctx->Depth.Clear = 1.0;
 837    ctx->Depth.Func = GL_LESS;
 838    ctx->Depth.Mask = GL_TRUE;
 839    ctx->Depth.OcclusionTest = GL_FALSE;
 840
 841    /* Evaluators group */
 842    ctx->Eval.Map1Color4 = GL_FALSE;
 843    ctx->Eval.Map1Index = GL_FALSE;
 844    ctx->Eval.Map1Normal = GL_FALSE;
 845    ctx->Eval.Map1TextureCoord1 = GL_FALSE;
 846    ctx->Eval.Map1TextureCoord2 = GL_FALSE;
 847    ctx->Eval.Map1TextureCoord3 = GL_FALSE;
 848    ctx->Eval.Map1TextureCoord4 = GL_FALSE;
 849    ctx->Eval.Map1Vertex3 = GL_FALSE;
 850    ctx->Eval.Map1Vertex4 = GL_FALSE;
 851    ctx->Eval.Map2Color4 = GL_FALSE;
 852    ctx->Eval.Map2Index = GL_FALSE;
 853    ctx->Eval.Map2Normal = GL_FALSE;
 854    ctx->Eval.Map2TextureCoord1 = GL_FALSE;
 855    ctx->Eval.Map2TextureCoord2 = GL_FALSE;
 856    ctx->Eval.Map2TextureCoord3 = GL_FALSE;
 857    ctx->Eval.Map2TextureCoord4 = GL_FALSE;
 858    ctx->Eval.Map2Vertex3 = GL_FALSE;
 859    ctx->Eval.Map2Vertex4 = GL_FALSE;
 860    ctx->Eval.AutoNormal = GL_FALSE;
 861    ctx->Eval.MapGrid1un = 1;
 862    ctx->Eval.MapGrid1u1 = 0.0;
 863    ctx->Eval.MapGrid1u2 = 1.0;
 864    ctx->Eval.MapGrid2un = 1;
 865    ctx->Eval.MapGrid2vn = 1;
 866    ctx->Eval.MapGrid2u1 = 0.0;
 867    ctx->Eval.MapGrid2u2 = 1.0;
 868    ctx->Eval.MapGrid2v1 = 0.0;
 869    ctx->Eval.MapGrid2v2 = 1.0;
 870
 871    /* Evaluator data */
 872    {
 873       static GLfloat vertex[4] = { 0.0, 0.0, 0.0, 1.0 };
 874       static GLfloat normal[3] = { 0.0, 0.0, 1.0 };
 875       static GLfloat index[1] = { 1.0 };
 876       static GLfloat color[4] = { 1.0, 1.0, 1.0, 1.0 };
 877       static GLfloat texcoord[4] = { 0.0, 0.0, 0.0, 1.0 };
 878
 879       init_1d_map( &ctx->EvalMap.Map1Vertex3, 3, vertex );
 880       init_1d_map( &ctx->EvalMap.Map1Vertex4, 4, vertex );
 881       init_1d_map( &ctx->EvalMap.Map1Index, 1, index );
 882       init_1d_map( &ctx->EvalMap.Map1Color4, 4, color );
 883       init_1d_map( &ctx->EvalMap.Map1Normal, 3, normal );
 884       init_1d_map( &ctx->EvalMap.Map1Texture1, 1, texcoord );
 885       init_1d_map( &ctx->EvalMap.Map1Texture2, 2, texcoord );
 886       init_1d_map( &ctx->EvalMap.Map1Texture3, 3, texcoord );
 887       init_1d_map( &ctx->EvalMap.Map1Texture4, 4, texcoord );
 888
 889       init_2d_map( &ctx->EvalMap.Map2Vertex3, 3, vertex );
 890       init_2d_map( &ctx->EvalMap.Map2Vertex4, 4, vertex );
 891       init_2d_map( &ctx->EvalMap.Map2Index, 1, index );
 892       init_2d_map( &ctx->EvalMap.Map2Color4, 4, color );
 893       init_2d_map( &ctx->EvalMap.Map2Normal, 3, normal );
 894       init_2d_map( &ctx->EvalMap.Map2Texture1, 1, texcoord );
 895       init_2d_map( &ctx->EvalMap.Map2Texture2, 2, texcoord );
 896       init_2d_map( &ctx->EvalMap.Map2Texture3, 3, texcoord );
 897       init_2d_map( &ctx->EvalMap.Map2Texture4, 4, texcoord );
 898    }
 899
 900    /* Fog group */
 901    ctx->Fog.Enabled = GL_FALSE;
 902    ctx->Fog.Mode = GL_EXP;
 903    ASSIGN_4V( ctx->Fog.Color, 0.0, 0.0, 0.0, 0.0 );
 904    ctx->Fog.Index = 0.0;
 905    ctx->Fog.Density = 1.0;
 906    ctx->Fog.Start = 0.0;
 907    ctx->Fog.End = 1.0;
 908
 909    /* Hint group */
 910    ctx->Hint.PerspectiveCorrection = GL_DONT_CARE;
 911    ctx->Hint.PointSmooth = GL_DONT_CARE;
 912    ctx->Hint.LineSmooth = GL_DONT_CARE;
 913    ctx->Hint.PolygonSmooth = GL_DONT_CARE;
 914    ctx->Hint.Fog = GL_DONT_CARE;
 915    ctx->Hint.AllowDrawWin = GL_TRUE;
 916    ctx->Hint.AllowDrawFrg = GL_TRUE;
 917    ctx->Hint.AllowDrawMem = GL_TRUE;
 918    ctx->Hint.StrictLighting = GL_TRUE;
 919    ctx->Hint.ClipVolumeClipping = GL_DONT_CARE;
 920    ctx->Hint.TextureCompression = GL_DONT_CARE;
 921
 922    /* Histogram group */
 923    ctx->Histogram.Width = 0;
 924    ctx->Histogram.Format = GL_RGBA;
 925    ctx->Histogram.Sink = GL_FALSE;
 926    ctx->Histogram.RedSize       = 0xffffffff;
 927    ctx->Histogram.GreenSize     = 0xffffffff;
 928    ctx->Histogram.BlueSize      = 0xffffffff;
 929    ctx->Histogram.AlphaSize     = 0xffffffff;
 930    ctx->Histogram.LuminanceSize = 0xffffffff;
 931    for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
 932       ctx->Histogram.Count[i][0] = 0;
 933       ctx->Histogram.Count[i][1] = 0;
 934       ctx->Histogram.Count[i][2] = 0;
 935       ctx->Histogram.Count[i][3] = 0;
 936    }
 937
 938    /* Min/Max group */
 939    ctx->MinMax.Format = GL_RGBA;
 940    ctx->MinMax.Sink = GL_FALSE;
 941    ctx->MinMax.Min[RCOMP] = 1000;    ctx->MinMax.Max[RCOMP] = -1000;
 942    ctx->MinMax.Min[GCOMP] = 1000;    ctx->MinMax.Max[GCOMP] = -1000;
 943    ctx->MinMax.Min[BCOMP] = 1000;    ctx->MinMax.Max[BCOMP] = -1000;
 944    ctx->MinMax.Min[ACOMP] = 1000;    ctx->MinMax.Max[ACOMP] = -1000;
 945
 946
 947
 948    /* Pipeline */
 949    gl_pipeline_init( ctx );
 950    gl_cva_init( ctx );
 951
 952    /* Extensions */
 953    gl_extensions_ctr( ctx );
 954
 955    ctx->AllowVertexCull = CLIP_CULLED_BIT;
 956
 957    /* Lighting group */
 958    for (i=0;i<MAX_LIGHTS;i++) {
 959       init_light( &ctx->Light.Light[i], i );
 960    }
 961    make_empty_list( &ctx->Light.EnabledList );
 962
 963    init_lightmodel( &ctx->Light.Model );
 964    init_material( &ctx->Light.Material[0] );
 965    init_material( &ctx->Light.Material[1] );
 966    ctx->Light.ShadeModel = GL_SMOOTH;
 967    ctx->Light.Enabled = GL_FALSE;
 968    ctx->Light.ColorMaterialFace = GL_FRONT_AND_BACK;
 969    ctx->Light.ColorMaterialMode = GL_AMBIENT_AND_DIFFUSE;
 970    ctx->Light.ColorMaterialBitmask
 971       = gl_material_bitmask( ctx,
 972                              GL_FRONT_AND_BACK,
 973                              GL_AMBIENT_AND_DIFFUSE, ~0, 0 );
 974
 975    ctx->Light.ColorMaterialEnabled = GL_FALSE;
 976
 977    /* Lighting miscellaneous */
 978    ctx->ShineTabList = MALLOC_STRUCT( gl_shine_tab );
 979    make_empty_list( ctx->ShineTabList );
 980    for (i = 0 ; i < 10 ; i++) {
 981       struct gl_shine_tab *s = MALLOC_STRUCT( gl_shine_tab );
 982       s->shininess = -1;
 983       s->refcount = 0;
 984       insert_at_tail( ctx->ShineTabList, s );
 985    }
 986    for (i = 0 ; i < 4 ; i++) {
 987       ctx->ShineTable[i] = ctx->ShineTabList->prev;
 988       ctx->ShineTable[i]->refcount++;
 989    }
 990
 991
 992    /* Line group */
 993    ctx->Line.SmoothFlag = GL_FALSE;
 994    ctx->Line.StippleFlag = GL_FALSE;
 995    ctx->Line.Width = 1.0;
 996    ctx->Line.StipplePattern = 0xffff;
 997    ctx->Line.StippleFactor = 1;
 998
 999    /* Display List group */
1000    ctx->List.ListBase = 0;
1001
1002    /* Pixel group */
1003    ctx->Pixel.RedBias = 0.0;
1004    ctx->Pixel.RedScale = 1.0;
1005    ctx->Pixel.GreenBias = 0.0;
1006    ctx->Pixel.GreenScale = 1.0;
1007    ctx->Pixel.BlueBias = 0.0;
1008    ctx->Pixel.BlueScale = 1.0;
1009    ctx->Pixel.AlphaBias = 0.0;
1010    ctx->Pixel.AlphaScale = 1.0;
1011    ctx->Pixel.ScaleOrBiasRGBA = GL_FALSE;
1012    ctx->Pixel.DepthBias = 0.0;
1013    ctx->Pixel.DepthScale = 1.0;
1014    ctx->Pixel.IndexOffset = 0;
1015    ctx->Pixel.IndexShift = 0;
1016    ctx->Pixel.ZoomX = 1.0;
1017    ctx->Pixel.ZoomY = 1.0;
1018    ctx->Pixel.MapColorFlag = GL_FALSE;
1019    ctx->Pixel.MapStencilFlag = GL_FALSE;
1020    ctx->Pixel.MapStoSsize = 1;
1021    ctx->Pixel.MapItoIsize = 1;
1022    ctx->Pixel.MapItoRsize = 1;
1023    ctx->Pixel.MapItoGsize = 1;
1024    ctx->Pixel.MapItoBsize = 1;
1025    ctx->Pixel.MapItoAsize = 1;
1026    ctx->Pixel.MapRtoRsize = 1;
1027    ctx->Pixel.MapGtoGsize = 1;
1028    ctx->Pixel.MapBtoBsize = 1;
1029    ctx->Pixel.MapAtoAsize = 1;
1030    ctx->Pixel.MapStoS[0] = 0;
1031    ctx->Pixel.MapItoI[0] = 0;
1032    ctx->Pixel.MapItoR[0] = 0.0;
1033    ctx->Pixel.MapItoG[0] = 0.0;
1034    ctx->Pixel.MapItoB[0] = 0.0;
1035    ctx->Pixel.MapItoA[0] = 0.0;
1036    ctx->Pixel.MapItoR8[0] = 0;
1037    ctx->Pixel.MapItoG8[0] = 0;
1038    ctx->Pixel.MapItoB8[0] = 0;
1039    ctx->Pixel.MapItoA8[0] = 0;
1040    ctx->Pixel.MapRtoR[0] = 0.0;
1041    ctx->Pixel.MapGtoG[0] = 0.0;
1042    ctx->Pixel.MapBtoB[0] = 0.0;
1043    ctx->Pixel.MapAtoA[0] = 0.0;
1044    ctx->Pixel.HistogramEnabled = GL_FALSE;
1045    ctx->Pixel.MinMaxEnabled = GL_FALSE;
1046    ctx->Pixel.PixelTextureEnabled = GL_FALSE;
1047    ctx->Pixel.FragmentRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
1048    ctx->Pixel.FragmentAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
1049    ASSIGN_4V(ctx->Pixel.PostColorMatrixScale, 1.0, 1.0, 1.0, 1.0);
1050    ASSIGN_4V(ctx->Pixel.PostColorMatrixBias, 0.0, 0.0, 0.0, 0.0);
1051    ASSIGN_4V(ctx->Pixel.ColorTableScale, 1.0, 1.0, 1.0, 1.0);
1052    ASSIGN_4V(ctx->Pixel.ColorTableBias, 0.0, 0.0, 0.0, 0.0);
1053    ctx->Pixel.ColorTableEnabled = GL_FALSE;
1054    ctx->Pixel.PostConvolutionColorTableEnabled = GL_FALSE;
1055    ctx->Pixel.PostColorMatrixColorTableEnabled = GL_FALSE;
1056    ctx->Pixel.Convolution1DEnabled = GL_FALSE;
1057    ctx->Pixel.Convolution2DEnabled = GL_FALSE;
1058    ctx->Pixel.Separable2DEnabled = GL_FALSE;
1059    for (i = 0; i < 3; i++) {
1060       ASSIGN_4V(ctx->Pixel.ConvolutionBorderColor[i], 0.0, 0.0, 0.0, 0.0);
1061       ctx->Pixel.ConvolutionBorderMode[i] = GL_REDUCE;
1062       ASSIGN_4V(ctx->Pixel.ConvolutionFilterScale[i], 1.0, 1.0, 1.0, 1.0);
1063       ASSIGN_4V(ctx->Pixel.ConvolutionFilterBias[i], 0.0, 0.0, 0.0, 0.0);
1064    }
1065    ASSIGN_4V(ctx->Pixel.PostConvolutionScale, 1.0, 1.0, 1.0, 1.0);
1066    ASSIGN_4V(ctx->Pixel.PostConvolutionBias, 0.0, 0.0, 0.0, 0.0);
1067
1068    /* Point group */
1069    ctx->Point.SmoothFlag = GL_FALSE;
1070    ctx->Point.Size = 1.0;
1071    ctx->Point.Params[0] = 1.0;
1072    ctx->Point.Params[1] = 0.0;
1073    ctx->Point.Params[2] = 0.0;
1074    ctx->Point.Attenuated = GL_FALSE;
1075    ctx->Point.MinSize = 0.0;
1076    ctx->Point.MaxSize = (GLfloat) MAX_POINT_SIZE;
1077    ctx->Point.Threshold = 1.0;
1078
1079    /* Polygon group */
1080    ctx->Polygon.CullFlag = GL_FALSE;
1081    ctx->Polygon.CullFaceMode = GL_BACK;
1082    ctx->Polygon.FrontFace = GL_CCW;
1083    ctx->Polygon.FrontBit = 0;
1084    ctx->Polygon.FrontMode = GL_FILL;
1085    ctx->Polygon.BackMode = GL_FILL;
1086    ctx->Polygon.Unfilled = GL_FALSE;
1087    ctx->Polygon.SmoothFlag = GL_FALSE;
1088    ctx->Polygon.StippleFlag = GL_FALSE;
1089    ctx->Polygon.OffsetFactor = 0.0F;
1090    ctx->Polygon.OffsetUnits = 0.0F;
1091    ctx->Polygon.OffsetPoint = GL_FALSE;
1092    ctx->Polygon.OffsetLine = GL_FALSE;
1093    ctx->Polygon.OffsetFill = GL_FALSE;
1094
1095    /* Polygon Stipple group */
1096    MEMSET( ctx->PolygonStipple, 0xff, 32*sizeof(GLuint) );
1097
1098    /* Scissor group */
1099    ctx->Scissor.Enabled = GL_FALSE;
1100    ctx->Scissor.X = 0;
1101    ctx->Scissor.Y = 0;
1102    ctx->Scissor.Width = 0;
1103    ctx->Scissor.Height = 0;
1104
1105    /* Stencil group */
1106    ctx->Stencil.Enabled = GL_FALSE;
1107    ctx->Stencil.Function = GL_ALWAYS;
1108    ctx->Stencil.FailFunc = GL_KEEP;
1109    ctx->Stencil.ZPassFunc = GL_KEEP;
1110    ctx->Stencil.ZFailFunc = GL_KEEP;
1111    ctx->Stencil.Ref = 0;
1112    ctx->Stencil.ValueMask = STENCIL_MAX;
1113    ctx->Stencil.Clear = 0;
1114    ctx->Stencil.WriteMask = STENCIL_MAX;
1115
1116    /* Texture group */
1117    ctx->Texture.CurrentUnit = 0;      /* multitexture */
1118    ctx->Texture.CurrentTransformUnit = 0; /* multitexture */
1119    ctx->Texture.Enabled = 0;
1120    for (i=0; i<MAX_TEXTURE_UNITS; i++)
1121       init_texture_unit( ctx, i );
1122    _mesa_init_colortable(&ctx->Texture.Palette);
1123
1124    /* Transformation group */
1125    ctx->Transform.MatrixMode = GL_MODELVIEW;
1126    ctx->Transform.Normalize = GL_FALSE;
1127    ctx->Transform.RescaleNormals = GL_FALSE;
1128    for (i=0;i<MAX_CLIP_PLANES;i++) {
1129       ctx->Transform.ClipEnabled[i] = GL_FALSE;
1130       ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 );
1131    }
1132    ctx->Transform.AnyClip = GL_FALSE;
1133
1134    /* Viewport group */
1135    ctx->Viewport.X = 0;
1136    ctx->Viewport.Y = 0;
1137    ctx->Viewport.Width = 0;
1138    ctx->Viewport.Height = 0;
1139    ctx->Viewport.Near = 0.0;
1140    ctx->Viewport.Far = 1.0;
1141    gl_matrix_ctr(&ctx->Viewport.WindowMap);
1142
1143 #define Sz 10
1144 #define Tz 14
1145    ctx->Viewport.WindowMap.m[Sz] = 0.5 * ctx->Visual->DepthMaxF;
1146    ctx->Viewport.WindowMap.m[Tz] = 0.5 * ctx->Visual->DepthMaxF;
1147 #undef Sz
1148 #undef Tz
1149
1150    ctx->Viewport.WindowMap.flags = MAT_FLAG_GENERAL_SCALE|MAT_FLAG_TRANSLATION;
1151    ctx->Viewport.WindowMap.type = MATRIX_3D_NO_ROT;
1152
1153    /* Vertex arrays */
1154    ctx->Array.Vertex.Size = 4;
1155    ctx->Array.Vertex.Type = GL_FLOAT;
1156    ctx->Array.Vertex.Stride = 0;
1157    ctx->Array.Vertex.StrideB = 0;
1158    ctx->Array.Vertex.Ptr = NULL;
1159    ctx->Array.Vertex.Enabled = GL_FALSE;
1160    ctx->Array.Normal.Type = GL_FLOAT;
1161    ctx->Array.Normal.Stride = 0;
1162    ctx->Array.Normal.StrideB = 0;
1163    ctx->Array.Normal.Ptr = NULL;
1164    ctx->Array.Normal.Enabled = GL_FALSE;
1165    ctx->Array.Color.Size = 4;
1166    ctx->Array.Color.Type = GL_FLOAT;
1167    ctx->Array.Color.Stride = 0;
1168    ctx->Array.Color.StrideB = 0;
1169    ctx->Array.Color.Ptr = NULL;
1170    ctx->Array.Color.Enabled = GL_FALSE;
1171    ctx->Array.Index.Type = GL_FLOAT;
1172    ctx->Array.Index.Stride = 0;
1173    ctx->Array.Index.StrideB = 0;
1174    ctx->Array.Index.Ptr = NULL;
1175    ctx->Array.Index.Enabled = GL_FALSE;
1176    for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
1177       ctx->Array.TexCoord[i].Size = 4;
1178       ctx->Array.TexCoord[i].Type = GL_FLOAT;
1179       ctx->Array.TexCoord[i].Stride = 0;
1180       ctx->Array.TexCoord[i].StrideB = 0;
1181       ctx->Array.TexCoord[i].Ptr = NULL;
1182       ctx->Array.TexCoord[i].Enabled = GL_FALSE;
1183    }
1184    ctx->Array.TexCoordInterleaveFactor = 1;
1185    ctx->Array.EdgeFlag.Stride = 0;
1186    ctx->Array.EdgeFlag.StrideB = 0;
1187    ctx->Array.EdgeFlag.Ptr = NULL;
1188    ctx->Array.EdgeFlag.Enabled = GL_FALSE;
1189    ctx->Array.ActiveTexture = 0;   /* GL_ARB_multitexture */
1190
1191    /* Pixel transfer */
1192    ctx->Pack.Alignment = 4;
1193    ctx->Pack.RowLength = 0;
1194    ctx->Pack.ImageHeight = 0;
1195    ctx->Pack.SkipPixels = 0;
1196    ctx->Pack.SkipRows = 0;
1197    ctx->Pack.SkipImages = 0;
1198    ctx->Pack.SwapBytes = GL_FALSE;
1199    ctx->Pack.LsbFirst = GL_FALSE;
1200    ctx->Unpack.Alignment = 4;
1201    ctx->Unpack.RowLength = 0;
1202    ctx->Unpack.ImageHeight = 0;
1203    ctx->Unpack.SkipPixels = 0;
1204    ctx->Unpack.SkipRows = 0;
1205    ctx->Unpack.SkipImages = 0;
1206    ctx->Unpack.SwapBytes = GL_FALSE;
1207    ctx->Unpack.LsbFirst = GL_FALSE;
1208
1209    /* Feedback */
1210    ctx->Feedback.Type = GL_2D;   /* TODO: verify */
1211    ctx->Feedback.Buffer = NULL;
1212    ctx->Feedback.BufferSize = 0;
1213    ctx->Feedback.Count = 0;
1214
1215    /* Selection/picking */
1216    ctx->Select.Buffer = NULL;
1217    ctx->Select.BufferSize = 0;
1218    ctx->Select.BufferCount = 0;
1219    ctx->Select.Hits = 0;
1220    ctx->Select.NameStackDepth = 0;
1221
1222    /* Optimized Accum buffer */
1223    ctx->IntegerAccumMode = GL_TRUE;
1224    ctx->IntegerAccumScaler = 0.0;
1225
1226    /* Renderer and client attribute stacks */
1227    ctx->AttribStackDepth = 0;
1228    ctx->ClientAttribStackDepth = 0;
1229
1230    /* Display list */
1231    ctx->CallDepth = 0;
1232    ctx->ExecuteFlag = GL_TRUE;
1233    ctx->CompileFlag = GL_FALSE;
1234    ctx->CurrentListPtr = NULL;
1235    ctx->CurrentBlock = NULL;
1236    ctx->CurrentListNum = 0;
1237    ctx->CurrentPos = 0;
1238
1239    /* Color tables */
1240    _mesa_init_colortable(&ctx->ColorTable);
1241    _mesa_init_colortable(&ctx->ProxyColorTable);
1242    _mesa_init_colortable(&ctx->PostConvolutionColorTable);
1243    _mesa_init_colortable(&ctx->ProxyPostConvolutionColorTable);
1244    _mesa_init_colortable(&ctx->PostColorMatrixColorTable);
1245    _mesa_init_colortable(&ctx->ProxyPostColorMatrixColorTable);
1246
1247    /* Miscellaneous */
1248    ctx->NewState = NEW_ALL;
1249    ctx->RenderMode = GL_RENDER;
1250    ctx->StippleCounter = 0;
1251    ctx->NeedNormals = GL_FALSE;
1252    ctx->DoViewportMapping = GL_TRUE;
1253
1254    ctx->NeedEyeCoords = GL_FALSE;
1255    ctx->NeedEyeNormals = GL_FALSE;
1256    ctx->vb_proj_matrix = &ctx->ModelProjectMatrix;
1257
1258    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
1259
1260    ctx->CatchSignals = GL_TRUE;
1261    ctx->OcclusionResult = GL_FALSE;
1262    ctx->OcclusionResultSaved = GL_FALSE;
1263
1264    /* For debug/development only */
1265    ctx->NoRaster = getenv("MESA_NO_RASTER") ? GL_TRUE : GL_FALSE;
1266    ctx->FirstTimeCurrent = GL_TRUE;
1267
1268    /* Dither disable */
1269    ctx->NoDither = getenv("MESA_NO_DITHER") ? GL_TRUE : GL_FALSE;
1270    if (ctx->NoDither) {
1271       if (getenv("MESA_DEBUG")) {
1272          fprintf(stderr, "MESA_NO_DITHER set - dithering disabled\n");
1273       }
1274       ctx->Color.DitherFlag = GL_FALSE;
1275    }
1276 }
1277
1278
1279
1280
1281 /*
1282  * Allocate the proxy textures.  If we run out of memory part way through
1283  * the allocations clean up and return GL_FALSE.
1284  * Return:  GL_TRUE=success, GL_FALSE=failure
1285  */
1286 static GLboolean
1287 alloc_proxy_textures( GLcontext *ctx )
1288 {
1289    GLboolean out_of_memory;
1290    GLint i;
1291
1292    ctx->Texture.Proxy1D = gl_alloc_texture_object(NULL, 0, 1);
1293    if (!ctx->Texture.Proxy1D) {
1294       return GL_FALSE;
1295    }
1296
1297    ctx->Texture.Proxy2D = gl_alloc_texture_object(NULL, 0, 2);
1298    if (!ctx->Texture.Proxy2D) {
1299       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1300       return GL_FALSE;
1301    }
1302
1303    ctx->Texture.Proxy3D = gl_alloc_texture_object(NULL, 0, 3);
1304    if (!ctx->Texture.Proxy3D) {
1305       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1306       gl_free_texture_object(NULL, ctx->Texture.Proxy2D);
1307       return GL_FALSE;
1308    }
1309
1310    out_of_memory = GL_FALSE;
1311    for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
1312       ctx->Texture.Proxy1D->Image[i] = _mesa_alloc_texture_image();
1313       ctx->Texture.Proxy2D->Image[i] = _mesa_alloc_texture_image();
1314       ctx->Texture.Proxy3D->Image[i] = _mesa_alloc_texture_image();
1315       if (!ctx->Texture.Proxy1D->Image[i]
1316           || !ctx->Texture.Proxy2D->Image[i]
1317           || !ctx->Texture.Proxy3D->Image[i]) {
1318          out_of_memory = GL_TRUE;
1319       }
1320    }
1321    if (out_of_memory) {
1322       for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
1323          if (ctx->Texture.Proxy1D->Image[i]) {
1324             _mesa_free_texture_image(ctx->Texture.Proxy1D->Image[i]);
1325          }
1326          if (ctx->Texture.Proxy2D->Image[i]) {
1327             _mesa_free_texture_image(ctx->Texture.Proxy2D->Image[i]);
1328          }
1329          if (ctx->Texture.Proxy3D->Image[i]) {
1330             _mesa_free_texture_image(ctx->Texture.Proxy3D->Image[i]);
1331          }
1332       }
1333       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1334       gl_free_texture_object(NULL, ctx->Texture.Proxy2D);
1335       gl_free_texture_object(NULL, ctx->Texture.Proxy3D);
1336       return GL_FALSE;
1337    }
1338    else {
1339       return GL_TRUE;
1340    }
1341 }
1342
1343
1344
1345 /*
1346  * Initialize a GLcontext struct.
1347  */
1348 GLboolean
1349 _mesa_initialize_context( GLcontext *ctx,
1350                           GLvisual *visual,
1351                           GLcontext *share_list,
1352                           void *driver_ctx,
1353                           GLboolean direct )
1354 {
1355    GLuint dispatchSize;
1356
1357    (void) direct;  /* not used */
1358
1359    /* misc one-time initializations */
1360    one_time_init();
1361
1362    ctx->DriverCtx = driver_ctx;
1363    ctx->Visual = visual;
1364    ctx->DrawBuffer = NULL;
1365    ctx->ReadBuffer = NULL;
1366
1367    ctx->VB = gl_vb_create_for_immediate( ctx );
1368    if (!ctx->VB) {
1369       FREE( ctx );
1370       return GL_FALSE;
1371    }
1372    ctx->input = ctx->VB->IM;
1373
1374    ctx->PB = gl_alloc_pb();
1375    if (!ctx->PB) {
1376       FREE( ctx->VB );
1377       FREE( ctx );
1378       return GL_FALSE;
1379    }
1380
1381    if (share_list) {
1382       /* share the group of display lists of another context */
1383       ctx->Shared = share_list->Shared;
1384    }
1385    else {
1386       /* allocate new group of display lists */
1387       ctx->Shared = alloc_shared_state();
1388       if (!ctx->Shared) {
1389          FREE(ctx->VB);
1390          FREE(ctx->PB);
1391          FREE(ctx);
1392          return GL_FALSE;
1393       }
1394    }
1395    _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1396    ctx->Shared->RefCount++;
1397    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1398
1399    init_attrib_groups( ctx );
1400
1401    gl_reset_vb( ctx->VB );
1402    gl_reset_input( ctx );
1403
1404    if (visual->DBflag) {
1405       ctx->Color.DrawBuffer = GL_BACK;
1406       ctx->Color.DriverDrawBuffer = GL_BACK_LEFT;
1407       ctx->Color.DrawDestMask = BACK_LEFT_BIT;
1408       ctx->Pixel.ReadBuffer = GL_BACK;
1409       ctx->Pixel.DriverReadBuffer = GL_BACK_LEFT;
1410    }
1411    else {
1412       ctx->Color.DrawBuffer = GL_FRONT;
1413       ctx->Color.DriverDrawBuffer = GL_FRONT_LEFT;
1414       ctx->Color.DrawDestMask = FRONT_LEFT_BIT;
1415       ctx->Pixel.ReadBuffer = GL_FRONT;
1416       ctx->Pixel.DriverReadBuffer = GL_FRONT_LEFT;
1417    }
1418
1419    if (!alloc_proxy_textures(ctx)) {
1420       free_shared_state(ctx, ctx->Shared);
1421       FREE(ctx->VB);
1422       FREE(ctx->PB);
1423       FREE(ctx);
1424       return GL_FALSE;
1425    }
1426
1427    /* register the most recent extension functions with libGL */
1428    _glapi_add_entrypoint("glTbufferMask3DFX", 553);
1429    _glapi_add_entrypoint("glCompressedTexImage3DARB", 554);
1430    _glapi_add_entrypoint("glCompressedTexImage2DARB", 555);
1431    _glapi_add_entrypoint("glCompressedTexImage1DARB", 556);
1432    _glapi_add_entrypoint("glCompressedTexSubImage3DARB", 557);
1433    _glapi_add_entrypoint("glCompressedTexSubImage2DARB", 558);
1434    _glapi_add_entrypoint("glCompressedTexSubImage1DARB", 559);
1435    _glapi_add_entrypoint("glGetCompressedTexImageARB", 560);
1436
1437    /* Find the larger of Mesa's dispatch table and libGL's dispatch table.
1438     * In practice, this'll be the same for stand-alone Mesa.  But for DRI
1439     * Mesa we do this to accomodate different versions of libGL and various
1440     * DRI drivers.
1441     */
1442    dispatchSize = MAX2(_glapi_get_dispatch_table_size(),
1443                        sizeof(struct _glapi_table) / sizeof(void *));
1444
1445    /* setup API dispatch tables */
1446    ctx->Exec = (struct _glapi_table *) CALLOC(dispatchSize * sizeof(void*));
1447    ctx->Save = (struct _glapi_table *) CALLOC(dispatchSize * sizeof(void*));
1448    if (!ctx->Exec || !ctx->Save) {
1449       free_shared_state(ctx, ctx->Shared);
1450       FREE(ctx->VB);
1451       FREE(ctx->PB);
1452       if (ctx->Exec)
1453          FREE(ctx->Exec);
1454       FREE(ctx);
1455    }
1456    _mesa_init_exec_table(ctx->Exec, dispatchSize);
1457    _mesa_init_dlist_table(ctx->Save, dispatchSize);
1458    ctx->CurrentDispatch = ctx->Exec;
1459
1460    return GL_TRUE;
1461 }
1462
1463
1464
1465 /*
1466  * Allocate and initialize a GLcontext structure.
1467  * Input:  visual - a GLvisual pointer
1468  *         sharelist - another context to share display lists with or NULL
1469  *         driver_ctx - pointer to device driver's context state struct
1470  * Return:  pointer to a new gl_context struct or NULL if error.
1471  */
1472 GLcontext *
1473 gl_create_context( GLvisual *visual,
1474                    GLcontext *share_list,
1475                    void *driver_ctx,
1476                    GLboolean direct )
1477 {
1478    GLcontext *ctx = (GLcontext *) CALLOC( sizeof(GLcontext) );
1479    if (!ctx) {
1480       return NULL;
1481    }
1482
1483    if (_mesa_initialize_context(ctx, visual, share_list, driver_ctx, direct)) {
1484       return ctx;
1485    }
1486    else {
1487       FREE(ctx);
1488       return NULL;
1489    }
1490 }
1491
1492
1493
1494 /*
1495  * Free the data associated with the given context.
1496  * But don't free() the GLcontext struct itself!
1497  */
1498 void
1499 gl_free_context_data( GLcontext *ctx )
1500 {
1501    struct gl_shine_tab *s, *tmps;
1502    GLuint i, j;
1503
1504    /* if we're destroying the current context, unbind it first */
1505    if (ctx == gl_get_current_context()) {
1506       gl_make_current(NULL, NULL);
1507    }
1508
1509    gl_matrix_dtr( &ctx->ModelView );
1510    for (i = 0; i < MAX_MODELVIEW_STACK_DEPTH - 1; i++) {
1511       gl_matrix_dtr( &ctx->ModelViewStack[i] );
1512    }
1513    gl_matrix_dtr( &ctx->ProjectionMatrix );
1514    for (i = 0; i < MAX_PROJECTION_STACK_DEPTH - 1; i++) {
1515       gl_matrix_dtr( &ctx->ProjectionStack[i] );
1516    }
1517    for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
1518       gl_matrix_dtr( &ctx->TextureMatrix[i] );
1519       for (j = 0; j < MAX_TEXTURE_STACK_DEPTH - 1; j++) {
1520          gl_matrix_dtr( &ctx->TextureStack[i][j] );
1521       }
1522    }
1523
1524    FREE( ctx->PB );
1525
1526    if (ctx->input != ctx->VB->IM)
1527       gl_immediate_free( ctx->input );
1528
1529    gl_vb_free( ctx->VB );
1530
1531    _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1532    ctx->Shared->RefCount--;
1533    assert(ctx->Shared->RefCount >= 0);
1534    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1535    if (ctx->Shared->RefCount == 0) {
1536       /* free shared state */
1537       free_shared_state( ctx, ctx->Shared );
1538    }
1539
1540    foreach_s( s, tmps, ctx->ShineTabList ) {
1541       FREE( s );
1542    }
1543    FREE( ctx->ShineTabList );
1544
1545    /* Free proxy texture objects */
1546    gl_free_texture_object( NULL, ctx->Texture.Proxy1D );
1547    gl_free_texture_object( NULL, ctx->Texture.Proxy2D );
1548    gl_free_texture_object( NULL, ctx->Texture.Proxy3D );
1549
1550    /* Free evaluator data */
1551    if (ctx->EvalMap.Map1Vertex3.Points)
1552       FREE( ctx->EvalMap.Map1Vertex3.Points );
1553    if (ctx->EvalMap.Map1Vertex4.Points)
1554       FREE( ctx->EvalMap.Map1Vertex4.Points );
1555    if (ctx->EvalMap.Map1Index.Points)
1556       FREE( ctx->EvalMap.Map1Index.Points );
1557    if (ctx->EvalMap.Map1Color4.Points)
1558       FREE( ctx->EvalMap.Map1Color4.Points );
1559    if (ctx->EvalMap.Map1Normal.Points)
1560       FREE( ctx->EvalMap.Map1Normal.Points );
1561    if (ctx->EvalMap.Map1Texture1.Points)
1562       FREE( ctx->EvalMap.Map1Texture1.Points );
1563    if (ctx->EvalMap.Map1Texture2.Points)
1564       FREE( ctx->EvalMap.Map1Texture2.Points );
1565    if (ctx->EvalMap.Map1Texture3.Points)
1566       FREE( ctx->EvalMap.Map1Texture3.Points );
1567    if (ctx->EvalMap.Map1Texture4.Points)
1568       FREE( ctx->EvalMap.Map1Texture4.Points );
1569
1570    if (ctx->EvalMap.Map2Vertex3.Points)
1571       FREE( ctx->EvalMap.Map2Vertex3.Points );
1572    if (ctx->EvalMap.Map2Vertex4.Points)
1573       FREE( ctx->EvalMap.Map2Vertex4.Points );
1574    if (ctx->EvalMap.Map2Index.Points)
1575       FREE( ctx->EvalMap.Map2Index.Points );
1576    if (ctx->EvalMap.Map2Color4.Points)
1577       FREE( ctx->EvalMap.Map2Color4.Points );
1578    if (ctx->EvalMap.Map2Normal.Points)
1579       FREE( ctx->EvalMap.Map2Normal.Points );
1580    if (ctx->EvalMap.Map2Texture1.Points)
1581       FREE( ctx->EvalMap.Map2Texture1.Points );
1582    if (ctx->EvalMap.Map2Texture2.Points)
1583       FREE( ctx->EvalMap.Map2Texture2.Points );
1584    if (ctx->EvalMap.Map2Texture3.Points)
1585       FREE( ctx->EvalMap.Map2Texture3.Points );
1586    if (ctx->EvalMap.Map2Texture4.Points)
1587       FREE( ctx->EvalMap.Map2Texture4.Points );
1588
1589    _mesa_free_colortable_data( &ctx->ColorTable );
1590    _mesa_free_colortable_data( &ctx->PostConvolutionColorTable );
1591    _mesa_free_colortable_data( &ctx->PostColorMatrixColorTable );
1592    _mesa_free_colortable_data( &ctx->Texture.Palette );
1593
1594    /* Free cache of immediate buffers. */
1595    while (ctx->nr_im_queued-- > 0) {
1596       struct immediate * next = ctx->freed_im_queue->next;
1597       FREE( ctx->freed_im_queue );
1598       ctx->freed_im_queue = next;
1599    }
1600    gl_extensions_dtr(ctx);
1601
1602    FREE(ctx->Exec);
1603    FREE(ctx->Save);
1604 }
1605
1606
1607
1608 /*
1609  * Destroy a GLcontext structure.
1610  */
1611 void
1612 gl_destroy_context( GLcontext *ctx )
1613 {
1614    if (ctx) {
1615       gl_free_context_data(ctx);
1616       FREE( (void *) ctx );
1617    }
1618 }
1619
1620
1621
1622 /*
1623  * Called by the driver after both the context and driver are fully
1624  * initialized.  Currently just reads the config file.
1625  */
1626 void
1627 gl_context_initialize( GLcontext *ctx )
1628 {
1629    gl_read_config_file( ctx );
1630 }
1631
1632
1633
1634 /*
1635  * Copy attribute groups from one context to another.
1636  * Input:  src - source context
1637  *         dst - destination context
1638  *         mask - bitwise OR of GL_*_BIT flags
1639  */
1640 void
1641 gl_copy_context( const GLcontext *src, GLcontext *dst, GLuint mask )
1642 {
1643    if (mask & GL_ACCUM_BUFFER_BIT) {
1644       MEMCPY( &dst->Accum, &src->Accum, sizeof(struct gl_accum_attrib) );
1645    }
1646    if (mask & GL_COLOR_BUFFER_BIT) {
1647       MEMCPY( &dst->Color, &src->Color, sizeof(struct gl_colorbuffer_attrib) );
1648    }
1649    if (mask & GL_CURRENT_BIT) {
1650       MEMCPY( &dst->Current, &src->Current, sizeof(struct gl_current_attrib) );
1651    }
1652    if (mask & GL_DEPTH_BUFFER_BIT) {
1653       MEMCPY( &dst->Depth, &src->Depth, sizeof(struct gl_depthbuffer_attrib) );
1654    }
1655    if (mask & GL_ENABLE_BIT) {
1656       /* no op */
1657    }
1658    if (mask & GL_EVAL_BIT) {
1659       MEMCPY( &dst->Eval, &src->Eval, sizeof(struct gl_eval_attrib) );
1660    }
1661    if (mask & GL_FOG_BIT) {
1662       MEMCPY( &dst->Fog, &src->Fog, sizeof(struct gl_fog_attrib) );
1663    }
1664    if (mask & GL_HINT_BIT) {
1665       MEMCPY( &dst->Hint, &src->Hint, sizeof(struct gl_hint_attrib) );
1666    }
1667    if (mask & GL_LIGHTING_BIT) {
1668       MEMCPY( &dst->Light, &src->Light, sizeof(struct gl_light_attrib) );
1669       /*       gl_reinit_light_attrib( &dst->Light ); */
1670    }
1671    if (mask & GL_LINE_BIT) {
1672       MEMCPY( &dst->Line, &src->Line, sizeof(struct gl_line_attrib) );
1673    }
1674    if (mask & GL_LIST_BIT) {
1675       MEMCPY( &dst->List, &src->List, sizeof(struct gl_list_attrib) );
1676    }
1677    if (mask & GL_PIXEL_MODE_BIT) {
1678       MEMCPY( &dst->Pixel, &src->Pixel, sizeof(struct gl_pixel_attrib) );
1679    }
1680    if (mask & GL_POINT_BIT) {
1681       MEMCPY( &dst->Point, &src->Point, sizeof(struct gl_point_attrib) );
1682    }
1683    if (mask & GL_POLYGON_BIT) {
1684       MEMCPY( &dst->Polygon, &src->Polygon, sizeof(struct gl_polygon_attrib) );
1685    }
1686    if (mask & GL_POLYGON_STIPPLE_BIT) {
1687       /* Use loop instead of MEMCPY due to problem with Portland Group's
1688        * C compiler.  Reported by John Stone.
1689        */
1690       int i;
1691       for (i=0;i<32;i++) {
1692          dst->PolygonStipple[i] = src->PolygonStipple[i];
1693       }
1694    }
1695    if (mask & GL_SCISSOR_BIT) {
1696       MEMCPY( &dst->Scissor, &src->Scissor, sizeof(struct gl_scissor_attrib) );
1697    }
1698    if (mask & GL_STENCIL_BUFFER_BIT) {
1699       MEMCPY( &dst->Stencil, &src->Stencil, sizeof(struct gl_stencil_attrib) );
1700    }
1701    if (mask & GL_TEXTURE_BIT) {
1702       MEMCPY( &dst->Texture, &src->Texture, sizeof(struct gl_texture_attrib) );
1703    }
1704    if (mask & GL_TRANSFORM_BIT) {
1705       MEMCPY( &dst->Transform, &src->Transform, sizeof(struct gl_transform_attrib) );
1706    }
1707    if (mask & GL_VIEWPORT_BIT) {
1708       MEMCPY( &dst->Viewport, &src->Viewport, sizeof(struct gl_viewport_attrib) );
1709    }
1710 }
1711
1712
1713 /*
1714  * Set the current context, binding the given frame buffer to the context.
1715  */
1716 void gl_make_current( GLcontext *newCtx, GLframebuffer *buffer )
1717 {
1718    gl_make_current2( newCtx, buffer, buffer );
1719 }
1720
1721
1722 /*
1723  * Bind the given context to the given draw-buffer and read-buffer
1724  * and make it the current context for this thread.
1725  */
1726 void gl_make_current2( GLcontext *newCtx, GLframebuffer *drawBuffer,
1727                        GLframebuffer *readBuffer )
1728 {
1729 #if 0
1730    GLcontext *oldCtx = gl_get_context();
1731
1732    /* Flush the old context
1733     */
1734    if (oldCtx) {
1735       ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(oldCtx, "gl_make_current");
1736
1737       /* unbind frame buffers from context */
1738       if (oldCtx->DrawBuffer) {
1739          oldCtx->DrawBuffer = NULL;
1740       }
1741       if (oldCtx->ReadBuffer) {
1742          oldCtx->ReadBuffer = NULL;
1743       }
1744    }
1745 #endif
1746
1747    /* We call this function periodically (just here for now) in
1748     * order to detect when multithreading has begun.
1749     */
1750    _glapi_check_multithread();
1751
1752    _glapi_set_context((void *) newCtx);
1753    ASSERT(gl_get_current_context() == newCtx);
1754    if (newCtx) {
1755       SET_IMMEDIATE(newCtx, newCtx->input);
1756       _glapi_set_dispatch(newCtx->CurrentDispatch);
1757    }
1758    else {
1759       _glapi_set_dispatch(NULL);  /* none current */
1760    }
1761
1762    if (MESA_VERBOSE) fprintf(stderr, "gl_make_current()\n");
1763
1764    if (newCtx && drawBuffer && readBuffer) {
1765       /* TODO: check if newCtx and buffer's visual match??? */
1766       newCtx->DrawBuffer = drawBuffer;
1767       newCtx->ReadBuffer = readBuffer;
1768       newCtx->NewState = NEW_ALL;   /* just to be safe */
1769       gl_update_state( newCtx );
1770    }
1771
1772    /* We can use this to help debug user's problems.  Tell the to set
1773     * the MESA_INFO env variable before running their app.  Then the
1774     * first time each context is made current we'll print some useful
1775     * information.
1776     */
1777    if (newCtx && newCtx->FirstTimeCurrent) {
1778       if (getenv("MESA_INFO")) {
1779          fprintf(stderr, "Mesa GL_VERSION = %s\n", (char *) _mesa_GetString(GL_VERSION));
1780          fprintf(stderr, "Mesa GL_RENDERER = %s\n", (char *) _mesa_GetString(GL_RENDERER));
1781          fprintf(stderr, "Mesa GL_VENDOR = %s\n", (char *) _mesa_GetString(GL_VENDOR));
1782          fprintf(stderr, "Mesa GL_EXTENSIONS = %s\n", (char *) _mesa_GetString(GL_EXTENSIONS));
1783 #if defined(THREADS)
1784          fprintf(stderr, "Mesa thread-safe: YES\n");
1785 #else
1786          fprintf(stderr, "Mesa thread-safe: NO\n");
1787 #endif
1788 #if defined(USE_X86_ASM)
1789          fprintf(stderr, "Mesa x86-optimized: YES\n");
1790 #else
1791          fprintf(stderr, "Mesa x86-optimized: NO\n");
1792 #endif
1793       }
1794       newCtx->FirstTimeCurrent = GL_FALSE;
1795    }
1796 }
1797
1798
1799
1800 /*
1801  * Return current context handle for the calling thread.
1802  * This isn't the fastest way to get the current context.
1803  * If you need speed, see the GET_CURRENT_CONTEXT() macro in context.h
1804  */
1805 GLcontext *gl_get_current_context( void )
1806 {
1807    return (GLcontext *) _glapi_get_context();
1808 }
1809
1810
1811
1812 /*
1813  * This should be called by device drivers just before they do a
1814  * swapbuffers.  Any pending rendering commands will be executed.
1815  */
1816 void
1817 _mesa_swapbuffers(GLcontext *ctx)
1818 {
1819    FLUSH_VB( ctx, "swap buffers" );
1820 }
1821
1822
1823
1824 /*
1825  * Return pointer to this context's current API dispatch table.
1826  * It'll either be the immediate-mode execute dispatcher or the
1827  * display list compile dispatcher.
1828  */
1829 struct _glapi_table *
1830 _mesa_get_dispatch(GLcontext *ctx)
1831 {
1832    return ctx->CurrentDispatch;
1833 }
1834
1835
1836
1837 /**********************************************************************/
1838 /*****                Miscellaneous functions                     *****/
1839 /**********************************************************************/
1840
1841
1842 /*
1843  * This function is called when the Mesa user has stumbled into a code
1844  * path which may not be implemented fully or correctly.
1845  */
1846 void gl_problem( const GLcontext *ctx, const char *s )
1847 {
1848    fprintf( stderr, "Mesa implementation error: %s\n", s );
1849    fprintf( stderr, "Report to Mesa bug database at www.mesa3d.org\n" );
1850    (void) ctx;
1851 }
1852
1853
1854
1855 /*
1856  * This is called to inform the user that he or she has tried to do
1857  * something illogical or if there's likely a bug in their program
1858  * (like enabled depth testing without a depth buffer).
1859  */
1860 void gl_warning( const GLcontext *ctx, const char *s )
1861 {
1862    GLboolean debug;
1863 #ifdef DEBUG
1864    debug = GL_TRUE;
1865 #else
1866    if (getenv("MESA_DEBUG")) {
1867       debug = GL_TRUE;
1868    }
1869    else {
1870       debug = GL_FALSE;
1871    }
1872 #endif
1873    if (debug) {
1874       fprintf( stderr, "Mesa warning: %s\n", s );
1875    }
1876    (void) ctx;
1877 }
1878
1879
1880
1881 /*
1882  * Compile an error into current display list.
1883  */
1884 void gl_compile_error( GLcontext *ctx, GLenum error, const char *s )
1885 {
1886    if (ctx->CompileFlag)
1887       gl_save_error( ctx, error, s );
1888
1889    if (ctx->ExecuteFlag)
1890       gl_error( ctx, error, s );
1891 }
1892
1893
1894
1895 /*
1896  * This is Mesa's error handler.  Normally, all that's done is the updating
1897  * of the current error value.  If Mesa is compiled with -DDEBUG or if the
1898  * environment variable "MESA_DEBUG" is defined then a real error message
1899  * is printed to stderr.
1900  * Input:  error - the error value
1901  *         s - a diagnostic string
1902  */
1903 void gl_error( GLcontext *ctx, GLenum error, const char *s )
1904 {
1905    GLboolean debug;
1906
1907 #ifdef DEBUG
1908    debug = GL_TRUE;
1909 #else
1910    if (getenv("MESA_DEBUG")) {
1911       debug = GL_TRUE;
1912    }
1913    else {
1914       debug = GL_FALSE;
1915    }
1916 #endif
1917
1918    if (debug) {
1919       char errstr[1000];
1920
1921       switch (error) {
1922          case GL_NO_ERROR:
1923             strcpy( errstr, "GL_NO_ERROR" );
1924             break;
1925          case GL_INVALID_VALUE:
1926             strcpy( errstr, "GL_INVALID_VALUE" );
1927             break;
1928          case GL_INVALID_ENUM:
1929             strcpy( errstr, "GL_INVALID_ENUM" );
1930             break;
1931          case GL_INVALID_OPERATION:
1932             strcpy( errstr, "GL_INVALID_OPERATION" );
1933             break;
1934          case GL_STACK_OVERFLOW:
1935             strcpy( errstr, "GL_STACK_OVERFLOW" );
1936             break;
1937          case GL_STACK_UNDERFLOW:
1938             strcpy( errstr, "GL_STACK_UNDERFLOW" );
1939             break;
1940          case GL_OUT_OF_MEMORY:
1941             strcpy( errstr, "GL_OUT_OF_MEMORY" );
1942             break;
1943          default:
1944             strcpy( errstr, "unknown" );
1945             break;
1946       }
1947       fprintf( stderr, "Mesa user error: %s in %s\n", errstr, s );
1948    }
1949
1950    if (ctx->ErrorValue==GL_NO_ERROR) {
1951       ctx->ErrorValue = error;
1952    }
1953
1954    /* Call device driver's error handler, if any.  This is used on the Mac. */
1955    if (ctx->Driver.Error) {
1956       (*ctx->Driver.Error)( ctx );
1957    }
1958 }
1959
1960
1961
1962 void
1963 _mesa_Finish( void )
1964 {
1965    GET_CURRENT_CONTEXT(ctx);
1966    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFinish");
1967    if (ctx->Driver.Finish) {
1968       (*ctx->Driver.Finish)( ctx );
1969    }
1970 }
1971
1972
1973
1974 void
1975 _mesa_Flush( void )
1976 {
1977    GET_CURRENT_CONTEXT(ctx);
1978    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFlush");
1979    if (ctx->Driver.Flush) {
1980       (*ctx->Driver.Flush)( ctx );
1981    }
1982 }