src/mesa/main/context.c

   1 /* $Id: context.c,v 1.66 2000/05/22 16:33:20 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    if (!ss->DisplayList || !ss->TexObjects || outOfMemory) {
 471       /* Ran out of memory at some point.  Free everything and return NULL */
 472       if (ss->DisplayList)
 473          _mesa_DeleteHashTable(ss->DisplayList);
 474       if (ss->TexObjects)
 475          _mesa_DeleteHashTable(ss->TexObjects);
 476       if (ss->DefaultD[1])
 477          gl_free_texture_object(ss, ss->DefaultD[1]);
 478       if (ss->DefaultD[2])
 479          gl_free_texture_object(ss, ss->DefaultD[2]);
 480       if (ss->DefaultD[3])
 481          gl_free_texture_object(ss, ss->DefaultD[3]);
 482       FREE(ss);
 483       return NULL;
 484    }
 485    else {
 486       return ss;
 487    }
 488 }
 489
 490
 491 /*
 492  * Deallocate a shared state context and all children structures.
 493  */
 494 static void
 495 free_shared_state( GLcontext *ctx, struct gl_shared_state *ss )
 496 {
 497    /* Free display lists */
 498    while (1) {
 499       GLuint list = _mesa_HashFirstEntry(ss->DisplayList);
 500       if (list) {
 501          gl_destroy_list(ctx, list);
 502       }
 503       else {
 504          break;
 505       }
 506    }
 507    _mesa_DeleteHashTable(ss->DisplayList);
 508
 509    /* Free texture objects */
 510    while (ss->TexObjectList)
 511    {
 512       if (ctx->Driver.DeleteTexture)
 513          (*ctx->Driver.DeleteTexture)( ctx, ss->TexObjectList );
 514       /* this function removes from linked list too! */
 515       gl_free_texture_object(ss, ss->TexObjectList);
 516    }
 517    _mesa_DeleteHashTable(ss->TexObjects);
 518
 519    FREE(ss);
 520 }
 521
 522
 523
 524 /*
 525  * Initialize the nth light.  Note that the defaults for light 0 are
 526  * different than the other lights.
 527  */
 528 static void
 529 init_light( struct gl_light *l, GLuint n )
 530 {
 531    make_empty_list( l );
 532
 533    ASSIGN_4V( l->Ambient, 0.0, 0.0, 0.0, 1.0 );
 534    if (n==0) {
 535       ASSIGN_4V( l->Diffuse, 1.0, 1.0, 1.0, 1.0 );
 536       ASSIGN_4V( l->Specular, 1.0, 1.0, 1.0, 1.0 );
 537    }
 538    else {
 539       ASSIGN_4V( l->Diffuse, 0.0, 0.0, 0.0, 1.0 );
 540       ASSIGN_4V( l->Specular, 0.0, 0.0, 0.0, 1.0 );
 541    }
 542    ASSIGN_4V( l->EyePosition, 0.0, 0.0, 1.0, 0.0 );
 543    ASSIGN_3V( l->EyeDirection, 0.0, 0.0, -1.0 );
 544    l->SpotExponent = 0.0;
 545    gl_compute_spot_exp_table( l );
 546    l->SpotCutoff = 180.0;
 547    l->CosCutoff = 0.0;          /* KW: -ve values not admitted */
 548    l->ConstantAttenuation = 1.0;
 549    l->LinearAttenuation = 0.0;
 550    l->QuadraticAttenuation = 0.0;
 551    l->Enabled = GL_FALSE;
 552 }
 553
 554
 555
 556 static void
 557 init_lightmodel( struct gl_lightmodel *lm )
 558 {
 559    ASSIGN_4V( lm->Ambient, 0.2, 0.2, 0.2, 1.0 );
 560    lm->LocalViewer = GL_FALSE;
 561    lm->TwoSide = GL_FALSE;
 562    lm->ColorControl = GL_SINGLE_COLOR;
 563 }
 564
 565
 566 static void
 567 init_material( struct gl_material *m )
 568 {
 569    ASSIGN_4V( m->Ambient,  0.2, 0.2, 0.2, 1.0 );
 570    ASSIGN_4V( m->Diffuse,  0.8, 0.8, 0.8, 1.0 );
 571    ASSIGN_4V( m->Specular, 0.0, 0.0, 0.0, 1.0 );
 572    ASSIGN_4V( m->Emission, 0.0, 0.0, 0.0, 1.0 );
 573    m->Shininess = 0.0;
 574    m->AmbientIndex = 0;
 575    m->DiffuseIndex = 1;
 576    m->SpecularIndex = 1;
 577 }
 578
 579
 580
 581 static void
 582 init_texture_unit( GLcontext *ctx, GLuint unit )
 583 {
 584    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
 585
 586    texUnit->EnvMode = GL_MODULATE;
 587    ASSIGN_4V( texUnit->EnvColor, 0.0, 0.0, 0.0, 0.0 );
 588    texUnit->TexGenEnabled = 0;
 589    texUnit->GenModeS = GL_EYE_LINEAR;
 590    texUnit->GenModeT = GL_EYE_LINEAR;
 591    texUnit->GenModeR = GL_EYE_LINEAR;
 592    texUnit->GenModeQ = GL_EYE_LINEAR;
 593    /* Yes, these plane coefficients are correct! */
 594    ASSIGN_4V( texUnit->ObjectPlaneS, 1.0, 0.0, 0.0, 0.0 );
 595    ASSIGN_4V( texUnit->ObjectPlaneT, 0.0, 1.0, 0.0, 0.0 );
 596    ASSIGN_4V( texUnit->ObjectPlaneR, 0.0, 0.0, 0.0, 0.0 );
 597    ASSIGN_4V( texUnit->ObjectPlaneQ, 0.0, 0.0, 0.0, 0.0 );
 598    ASSIGN_4V( texUnit->EyePlaneS, 1.0, 0.0, 0.0, 0.0 );
 599    ASSIGN_4V( texUnit->EyePlaneT, 0.0, 1.0, 0.0, 0.0 );
 600    ASSIGN_4V( texUnit->EyePlaneR, 0.0, 0.0, 0.0, 0.0 );
 601    ASSIGN_4V( texUnit->EyePlaneQ, 0.0, 0.0, 0.0, 0.0 );
 602
 603    texUnit->CurrentD[1] = ctx->Shared->DefaultD[1];
 604    texUnit->CurrentD[2] = ctx->Shared->DefaultD[2];
 605    texUnit->CurrentD[3] = ctx->Shared->DefaultD[3];
 606 }
 607
 608
 609 static void
 610 init_fallback_arrays( GLcontext *ctx )
 611 {
 612    struct gl_client_array *cl;
 613    GLuint i;
 614
 615    cl = &ctx->Fallback.Normal;
 616    cl->Size = 3;
 617    cl->Type = GL_FLOAT;
 618    cl->Stride = 0;
 619    cl->StrideB = 0;
 620    cl->Ptr = (void *) ctx->Current.Normal;
 621    cl->Enabled = 1;
 622
 623    cl = &ctx->Fallback.Color;
 624    cl->Size = 4;
 625    cl->Type = GL_UNSIGNED_BYTE;
 626    cl->Stride = 0;
 627    cl->StrideB = 0;
 628    cl->Ptr = (void *) ctx->Current.ByteColor;
 629    cl->Enabled = 1;
 630
 631    cl = &ctx->Fallback.Index;
 632    cl->Size = 1;
 633    cl->Type = GL_UNSIGNED_INT;
 634    cl->Stride = 0;
 635    cl->StrideB = 0;
 636    cl->Ptr = (void *) &ctx->Current.Index;
 637    cl->Enabled = 1;
 638
 639    for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++) {
 640       cl = &ctx->Fallback.TexCoord[i];
 641       cl->Size = 4;
 642       cl->Type = GL_FLOAT;
 643       cl->Stride = 0;
 644       cl->StrideB = 0;
 645       cl->Ptr = (void *) ctx->Current.Texcoord[i];
 646       cl->Enabled = 1;
 647    }
 648
 649    cl = &ctx->Fallback.EdgeFlag;
 650    cl->Size = 1;
 651    cl->Type = GL_UNSIGNED_BYTE;
 652    cl->Stride = 0;
 653    cl->StrideB = 0;
 654    cl->Ptr = (void *) &ctx->Current.EdgeFlag;
 655    cl->Enabled = 1;
 656 }
 657
 658
 659 /* Initialize a 1-D evaluator map */
 660 static void
 661 init_1d_map( struct gl_1d_map *map, int n, const float *initial )
 662 {
 663    map->Order = 1;
 664    map->u1 = 0.0;
 665    map->u2 = 1.0;
 666    map->Points = (GLfloat *) MALLOC(n * sizeof(GLfloat));
 667    if (map->Points) {
 668       GLint i;
 669       for (i=0;i<n;i++)
 670          map->Points[i] = initial[i];
 671    }
 672 }
 673
 674
 675 /* Initialize a 2-D evaluator map */
 676 static void
 677 init_2d_map( struct gl_2d_map *map, int n, const float *initial )
 678 {
 679    map->Uorder = 1;
 680    map->Vorder = 1;
 681    map->u1 = 0.0;
 682    map->u2 = 1.0;
 683    map->v1 = 0.0;
 684    map->v2 = 1.0;
 685    map->Points = (GLfloat *) MALLOC(n * sizeof(GLfloat));
 686    if (map->Points) {
 687       GLint i;
 688       for (i=0;i<n;i++)
 689          map->Points[i] = initial[i];
 690    }
 691 }
 692
 693
 694 /*
 695  * Initialize the attribute groups in a GLcontext.
 696  */
 697 static void
 698 init_attrib_groups( GLcontext *ctx )
 699 {
 700    GLuint i, j;
 701
 702    assert(ctx);
 703
 704    /* Constants, may be overriden by device drivers */
 705    ctx->Const.MaxTextureLevels = MAX_TEXTURE_LEVELS;
 706    ctx->Const.MaxTextureSize = 1 << (MAX_TEXTURE_LEVELS - 1);
 707    ctx->Const.MaxCubeTextureSize = ctx->Const.MaxTextureSize;
 708    ctx->Const.MaxTextureUnits = MAX_TEXTURE_UNITS;
 709    ctx->Const.MaxArrayLockSize = MAX_ARRAY_LOCK_SIZE;
 710    ctx->Const.SubPixelBits = SUB_PIXEL_BITS;
 711    ctx->Const.MinPointSize = MIN_POINT_SIZE;
 712    ctx->Const.MaxPointSize = MAX_POINT_SIZE;
 713    ctx->Const.MinPointSizeAA = MIN_POINT_SIZE;
 714    ctx->Const.MaxPointSizeAA = MAX_POINT_SIZE;
 715    ctx->Const.PointSizeGranularity = POINT_SIZE_GRANULARITY;
 716    ctx->Const.MinLineWidth = MIN_LINE_WIDTH;
 717    ctx->Const.MaxLineWidth = MAX_LINE_WIDTH;
 718    ctx->Const.MinLineWidthAA = MIN_LINE_WIDTH;
 719    ctx->Const.MaxLineWidthAA = MAX_LINE_WIDTH;
 720    ctx->Const.LineWidthGranularity = LINE_WIDTH_GRANULARITY;
 721    ctx->Const.NumAuxBuffers = NUM_AUX_BUFFERS;
 722    ctx->Const.MaxColorTableSize = MAX_COLOR_TABLE_SIZE;
 723    ctx->Const.MaxConvolutionWidth = MAX_CONVOLUTION_WIDTH;
 724    ctx->Const.MaxConvolutionHeight = MAX_CONVOLUTION_HEIGHT;
 725
 726    /* Modelview matrix */
 727    gl_matrix_ctr( &ctx->ModelView );
 728    gl_matrix_alloc_inv( &ctx->ModelView );
 729
 730    ctx->ModelViewStackDepth = 0;
 731    for (i = 0; i < MAX_MODELVIEW_STACK_DEPTH - 1; i++) {
 732       gl_matrix_ctr( &ctx->ModelViewStack[i] );
 733       gl_matrix_alloc_inv( &ctx->ModelViewStack[i] );
 734    }
 735
 736    /* Projection matrix - need inv for user clipping in clip space*/
 737    gl_matrix_ctr( &ctx->ProjectionMatrix );
 738    gl_matrix_alloc_inv( &ctx->ProjectionMatrix );
 739
 740    gl_matrix_ctr( &ctx->ModelProjectMatrix );
 741    gl_matrix_ctr( &ctx->ModelProjectWinMatrix );
 742    ctx->ModelProjectWinMatrixUptodate = GL_FALSE;
 743
 744    ctx->ProjectionStackDepth = 0;
 745    ctx->NearFarStack[0][0] = 1.0; /* These values seem weird by make */
 746    ctx->NearFarStack[0][1] = 0.0; /* sense mathematically. */
 747
 748    for (i = 0; i < MAX_PROJECTION_STACK_DEPTH - 1; i++) {
 749       gl_matrix_ctr( &ctx->ProjectionStack[i] );
 750       gl_matrix_alloc_inv( &ctx->ProjectionStack[i] );
 751    }
 752
 753    /* Texture matrix */
 754    for (i=0; i<MAX_TEXTURE_UNITS; i++) {
 755       gl_matrix_ctr( &ctx->TextureMatrix[i] );
 756       ctx->TextureStackDepth[i] = 0;
 757       for (j = 0; j < MAX_TEXTURE_STACK_DEPTH - 1; j++) {
 758          ctx->TextureStack[i][j].inv = 0;
 759       }
 760    }
 761
 762    /* Color matrix */
 763    gl_matrix_ctr(&ctx->ColorMatrix);
 764    ctx->ColorStackDepth = 0;
 765    for (j = 0; j < MAX_COLOR_STACK_DEPTH - 1; j++) {
 766       gl_matrix_ctr(&ctx->ColorStack[j]);
 767    }
 768
 769    /* Accumulate buffer group */
 770    ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 771
 772    /* Color buffer group */
 773    ctx->Color.IndexMask = 0xffffffff;
 774    ctx->Color.ColorMask[0] = 0xff;
 775    ctx->Color.ColorMask[1] = 0xff;
 776    ctx->Color.ColorMask[2] = 0xff;
 777    ctx->Color.ColorMask[3] = 0xff;
 778    ctx->Color.SWmasking = GL_FALSE;
 779    ctx->Color.ClearIndex = 0;
 780    ASSIGN_4V( ctx->Color.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 781    ctx->Color.DrawBuffer = GL_FRONT;
 782    ctx->Color.AlphaEnabled = GL_FALSE;
 783    ctx->Color.AlphaFunc = GL_ALWAYS;
 784    ctx->Color.AlphaRef = 0;
 785    ctx->Color.BlendEnabled = GL_FALSE;
 786    ctx->Color.BlendSrcRGB = GL_ONE;
 787    ctx->Color.BlendDstRGB = GL_ZERO;
 788    ctx->Color.BlendSrcA = GL_ONE;
 789    ctx->Color.BlendDstA = GL_ZERO;
 790    ctx->Color.BlendEquation = GL_FUNC_ADD_EXT;
 791    ctx->Color.BlendFunc = NULL;  /* this pointer set only when needed */
 792    ASSIGN_4V( ctx->Color.BlendColor, 0.0, 0.0, 0.0, 0.0 );
 793    ctx->Color.IndexLogicOpEnabled = GL_FALSE;
 794    ctx->Color.ColorLogicOpEnabled = GL_FALSE;
 795    ctx->Color.SWLogicOpEnabled = GL_FALSE;
 796    ctx->Color.LogicOp = GL_COPY;
 797    ctx->Color.DitherFlag = GL_TRUE;
 798    ctx->Color.MultiDrawBuffer = GL_FALSE;
 799
 800    /* Current group */
 801    ASSIGN_4V( ctx->Current.ByteColor, 255, 255, 255, 255);
 802    ctx->Current.Index = 1;
 803    for (i=0; i<MAX_TEXTURE_UNITS; i++)
 804       ASSIGN_4V( ctx->Current.Texcoord[i], 0.0, 0.0, 0.0, 1.0 );
 805    ASSIGN_4V( ctx->Current.RasterPos, 0.0, 0.0, 0.0, 1.0 );
 806    ctx->Current.RasterDistance = 0.0;
 807    ASSIGN_4V( ctx->Current.RasterColor, 1.0, 1.0, 1.0, 1.0 );
 808    ctx->Current.RasterIndex = 1;
 809    for (i=0; i<MAX_TEXTURE_UNITS; i++)
 810       ASSIGN_4V( ctx->Current.RasterMultiTexCoord[i], 0.0, 0.0, 0.0, 1.0 );
 811    ctx->Current.RasterTexCoord = ctx->Current.RasterMultiTexCoord[0];
 812    ctx->Current.RasterPosValid = GL_TRUE;
 813    ctx->Current.EdgeFlag = GL_TRUE;
 814    ASSIGN_3V( ctx->Current.Normal, 0.0, 0.0, 1.0 );
 815    ctx->Current.Primitive = (GLenum) (GL_POLYGON + 1);
 816
 817    ctx->Current.Flag = (VERT_NORM|VERT_INDEX|VERT_RGBA|VERT_EDGE|
 818                         VERT_TEX0_1|VERT_TEX1_1|VERT_MATERIAL);
 819
 820    init_fallback_arrays( ctx );
 821
 822    /* Depth buffer group */
 823    ctx->Depth.Test = GL_FALSE;
 824    ctx->Depth.Clear = 1.0;
 825    ctx->Depth.Func = GL_LESS;
 826    ctx->Depth.Mask = GL_TRUE;
 827    ctx->Depth.OcclusionTest = GL_FALSE;
 828
 829    /* Evaluators group */
 830    ctx->Eval.Map1Color4 = GL_FALSE;
 831    ctx->Eval.Map1Index = GL_FALSE;
 832    ctx->Eval.Map1Normal = GL_FALSE;
 833    ctx->Eval.Map1TextureCoord1 = GL_FALSE;
 834    ctx->Eval.Map1TextureCoord2 = GL_FALSE;
 835    ctx->Eval.Map1TextureCoord3 = GL_FALSE;
 836    ctx->Eval.Map1TextureCoord4 = GL_FALSE;
 837    ctx->Eval.Map1Vertex3 = GL_FALSE;
 838    ctx->Eval.Map1Vertex4 = GL_FALSE;
 839    ctx->Eval.Map2Color4 = GL_FALSE;
 840    ctx->Eval.Map2Index = GL_FALSE;
 841    ctx->Eval.Map2Normal = GL_FALSE;
 842    ctx->Eval.Map2TextureCoord1 = GL_FALSE;
 843    ctx->Eval.Map2TextureCoord2 = GL_FALSE;
 844    ctx->Eval.Map2TextureCoord3 = GL_FALSE;
 845    ctx->Eval.Map2TextureCoord4 = GL_FALSE;
 846    ctx->Eval.Map2Vertex3 = GL_FALSE;
 847    ctx->Eval.Map2Vertex4 = GL_FALSE;
 848    ctx->Eval.AutoNormal = GL_FALSE;
 849    ctx->Eval.MapGrid1un = 1;
 850    ctx->Eval.MapGrid1u1 = 0.0;
 851    ctx->Eval.MapGrid1u2 = 1.0;
 852    ctx->Eval.MapGrid2un = 1;
 853    ctx->Eval.MapGrid2vn = 1;
 854    ctx->Eval.MapGrid2u1 = 0.0;
 855    ctx->Eval.MapGrid2u2 = 1.0;
 856    ctx->Eval.MapGrid2v1 = 0.0;
 857    ctx->Eval.MapGrid2v2 = 1.0;
 858
 859    /* Evaluator data */
 860    {
 861       static GLfloat vertex[4] = { 0.0, 0.0, 0.0, 1.0 };
 862       static GLfloat normal[3] = { 0.0, 0.0, 1.0 };
 863       static GLfloat index[1] = { 1.0 };
 864       static GLfloat color[4] = { 1.0, 1.0, 1.0, 1.0 };
 865       static GLfloat texcoord[4] = { 0.0, 0.0, 0.0, 1.0 };
 866
 867       init_1d_map( &ctx->EvalMap.Map1Vertex3, 3, vertex );
 868       init_1d_map( &ctx->EvalMap.Map1Vertex4, 4, vertex );
 869       init_1d_map( &ctx->EvalMap.Map1Index, 1, index );
 870       init_1d_map( &ctx->EvalMap.Map1Color4, 4, color );
 871       init_1d_map( &ctx->EvalMap.Map1Normal, 3, normal );
 872       init_1d_map( &ctx->EvalMap.Map1Texture1, 1, texcoord );
 873       init_1d_map( &ctx->EvalMap.Map1Texture2, 2, texcoord );
 874       init_1d_map( &ctx->EvalMap.Map1Texture3, 3, texcoord );
 875       init_1d_map( &ctx->EvalMap.Map1Texture4, 4, texcoord );
 876
 877       init_2d_map( &ctx->EvalMap.Map2Vertex3, 3, vertex );
 878       init_2d_map( &ctx->EvalMap.Map2Vertex4, 4, vertex );
 879       init_2d_map( &ctx->EvalMap.Map2Index, 1, index );
 880       init_2d_map( &ctx->EvalMap.Map2Color4, 4, color );
 881       init_2d_map( &ctx->EvalMap.Map2Normal, 3, normal );
 882       init_2d_map( &ctx->EvalMap.Map2Texture1, 1, texcoord );
 883       init_2d_map( &ctx->EvalMap.Map2Texture2, 2, texcoord );
 884       init_2d_map( &ctx->EvalMap.Map2Texture3, 3, texcoord );
 885       init_2d_map( &ctx->EvalMap.Map2Texture4, 4, texcoord );
 886    }
 887
 888    /* Fog group */
 889    ctx->Fog.Enabled = GL_FALSE;
 890    ctx->Fog.Mode = GL_EXP;
 891    ASSIGN_4V( ctx->Fog.Color, 0.0, 0.0, 0.0, 0.0 );
 892    ctx->Fog.Index = 0.0;
 893    ctx->Fog.Density = 1.0;
 894    ctx->Fog.Start = 0.0;
 895    ctx->Fog.End = 1.0;
 896
 897    /* Hint group */
 898    ctx->Hint.PerspectiveCorrection = GL_DONT_CARE;
 899    ctx->Hint.PointSmooth = GL_DONT_CARE;
 900    ctx->Hint.LineSmooth = GL_DONT_CARE;
 901    ctx->Hint.PolygonSmooth = GL_DONT_CARE;
 902    ctx->Hint.Fog = GL_DONT_CARE;
 903
 904    ctx->Hint.AllowDrawWin = GL_TRUE;
 905    ctx->Hint.AllowDrawFrg = GL_TRUE;
 906    ctx->Hint.AllowDrawMem = GL_TRUE;
 907    ctx->Hint.StrictLighting = GL_TRUE;
 908
 909    /* Histogram group */
 910    ctx->Histogram.Width = 0;
 911    ctx->Histogram.Format = GL_RGBA;
 912    ctx->Histogram.Sink = GL_FALSE;
 913    ctx->Histogram.RedSize       = 0xffffffff;
 914    ctx->Histogram.GreenSize     = 0xffffffff;
 915    ctx->Histogram.BlueSize      = 0xffffffff;
 916    ctx->Histogram.AlphaSize     = 0xffffffff;
 917    ctx->Histogram.LuminanceSize = 0xffffffff;
 918    for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
 919       ctx->Histogram.Count[i][0] = 0;
 920       ctx->Histogram.Count[i][1] = 0;
 921       ctx->Histogram.Count[i][2] = 0;
 922       ctx->Histogram.Count[i][3] = 0;
 923    }
 924
 925    /* Min/Max group */
 926    ctx->MinMax.Format = GL_RGBA;
 927    ctx->MinMax.Sink = GL_FALSE;
 928    ctx->MinMax.Min[RCOMP] = 1000;    ctx->MinMax.Max[RCOMP] = -1000;
 929    ctx->MinMax.Min[GCOMP] = 1000;    ctx->MinMax.Max[GCOMP] = -1000;
 930    ctx->MinMax.Min[BCOMP] = 1000;    ctx->MinMax.Max[BCOMP] = -1000;
 931    ctx->MinMax.Min[ACOMP] = 1000;    ctx->MinMax.Max[ACOMP] = -1000;
 932
 933
 934
 935    /* Pipeline */
 936    gl_pipeline_init( ctx );
 937    gl_cva_init( ctx );
 938
 939    /* Extensions */
 940    gl_extensions_ctr( ctx );
 941
 942    ctx->AllowVertexCull = CLIP_CULLED_BIT;
 943
 944    /* Lighting group */
 945    for (i=0;i<MAX_LIGHTS;i++) {
 946       init_light( &ctx->Light.Light[i], i );
 947    }
 948    make_empty_list( &ctx->Light.EnabledList );
 949
 950    init_lightmodel( &ctx->Light.Model );
 951    init_material( &ctx->Light.Material[0] );
 952    init_material( &ctx->Light.Material[1] );
 953    ctx->Light.ShadeModel = GL_SMOOTH;
 954    ctx->Light.Enabled = GL_FALSE;
 955    ctx->Light.ColorMaterialFace = GL_FRONT_AND_BACK;
 956    ctx->Light.ColorMaterialMode = GL_AMBIENT_AND_DIFFUSE;
 957    ctx->Light.ColorMaterialBitmask
 958       = gl_material_bitmask( ctx,
 959                              GL_FRONT_AND_BACK,
 960                              GL_AMBIENT_AND_DIFFUSE, ~0, 0 );
 961
 962    ctx->Light.ColorMaterialEnabled = GL_FALSE;
 963
 964    /* Lighting miscellaneous */
 965    ctx->ShineTabList = MALLOC_STRUCT( gl_shine_tab );
 966    make_empty_list( ctx->ShineTabList );
 967    for (i = 0 ; i < 10 ; i++) {
 968       struct gl_shine_tab *s = MALLOC_STRUCT( gl_shine_tab );
 969       s->shininess = -1;
 970       s->refcount = 0;
 971       insert_at_tail( ctx->ShineTabList, s );
 972    }
 973    for (i = 0 ; i < 4 ; i++) {
 974       ctx->ShineTable[i] = ctx->ShineTabList->prev;
 975       ctx->ShineTable[i]->refcount++;
 976    }
 977
 978
 979    /* Line group */
 980    ctx->Line.SmoothFlag = GL_FALSE;
 981    ctx->Line.StippleFlag = GL_FALSE;
 982    ctx->Line.Width = 1.0;
 983    ctx->Line.StipplePattern = 0xffff;
 984    ctx->Line.StippleFactor = 1;
 985
 986    /* Display List group */
 987    ctx->List.ListBase = 0;
 988
 989    /* Pixel group */
 990    ctx->Pixel.RedBias = 0.0;
 991    ctx->Pixel.RedScale = 1.0;
 992    ctx->Pixel.GreenBias = 0.0;
 993    ctx->Pixel.GreenScale = 1.0;
 994    ctx->Pixel.BlueBias = 0.0;
 995    ctx->Pixel.BlueScale = 1.0;
 996    ctx->Pixel.AlphaBias = 0.0;
 997    ctx->Pixel.AlphaScale = 1.0;
 998    ctx->Pixel.ScaleOrBiasRGBA = GL_FALSE;
 999    ctx->Pixel.DepthBias = 0.0;
1000    ctx->Pixel.DepthScale = 1.0;
1001    ctx->Pixel.IndexOffset = 0;
1002    ctx->Pixel.IndexShift = 0;
1003    ctx->Pixel.ZoomX = 1.0;
1004    ctx->Pixel.ZoomY = 1.0;
1005    ctx->Pixel.MapColorFlag = GL_FALSE;
1006    ctx->Pixel.MapStencilFlag = GL_FALSE;
1007    ctx->Pixel.MapStoSsize = 1;
1008    ctx->Pixel.MapItoIsize = 1;
1009    ctx->Pixel.MapItoRsize = 1;
1010    ctx->Pixel.MapItoGsize = 1;
1011    ctx->Pixel.MapItoBsize = 1;
1012    ctx->Pixel.MapItoAsize = 1;
1013    ctx->Pixel.MapRtoRsize = 1;
1014    ctx->Pixel.MapGtoGsize = 1;
1015    ctx->Pixel.MapBtoBsize = 1;
1016    ctx->Pixel.MapAtoAsize = 1;
1017    ctx->Pixel.MapStoS[0] = 0;
1018    ctx->Pixel.MapItoI[0] = 0;
1019    ctx->Pixel.MapItoR[0] = 0.0;
1020    ctx->Pixel.MapItoG[0] = 0.0;
1021    ctx->Pixel.MapItoB[0] = 0.0;
1022    ctx->Pixel.MapItoA[0] = 0.0;
1023    ctx->Pixel.MapItoR8[0] = 0;
1024    ctx->Pixel.MapItoG8[0] = 0;
1025    ctx->Pixel.MapItoB8[0] = 0;
1026    ctx->Pixel.MapItoA8[0] = 0;
1027    ctx->Pixel.MapRtoR[0] = 0.0;
1028    ctx->Pixel.MapGtoG[0] = 0.0;
1029    ctx->Pixel.MapBtoB[0] = 0.0;
1030    ctx->Pixel.MapAtoA[0] = 0.0;
1031    ctx->Pixel.HistogramEnabled = GL_FALSE;
1032    ctx->Pixel.MinMaxEnabled = GL_FALSE;
1033    ctx->Pixel.PixelTextureEnabled = GL_FALSE;
1034    ctx->Pixel.FragmentRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
1035    ctx->Pixel.FragmentAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
1036    ASSIGN_4V(ctx->Pixel.PostColorMatrixScale, 1.0, 1.0, 1.0, 1.0);
1037    ASSIGN_4V(ctx->Pixel.PostColorMatrixBias, 0.0, 0.0, 0.0, 0.0);
1038    ASSIGN_4V(ctx->Pixel.ColorTableScale, 1.0, 1.0, 1.0, 1.0);
1039    ASSIGN_4V(ctx->Pixel.ColorTableBias, 0.0, 0.0, 0.0, 0.0);
1040    ctx->Pixel.ColorTableEnabled = GL_FALSE;
1041    ctx->Pixel.PostConvolutionColorTableEnabled = GL_FALSE;
1042    ctx->Pixel.PostColorMatrixColorTableEnabled = GL_FALSE;
1043    ctx->Pixel.Convolution1DEnabled = GL_FALSE;
1044    ctx->Pixel.Convolution2DEnabled = GL_FALSE;
1045    ctx->Pixel.Separable2DEnabled = GL_FALSE;
1046    for (i = 0; i < 3; i++) {
1047       ASSIGN_4V(ctx->Pixel.ConvolutionBorderColor[i], 0.0, 0.0, 0.0, 0.0);
1048       ctx->Pixel.ConvolutionBorderMode[i] = GL_REDUCE;
1049       ASSIGN_4V(ctx->Pixel.ConvolutionFilterScale[i], 1.0, 1.0, 1.0, 1.0);
1050       ASSIGN_4V(ctx->Pixel.ConvolutionFilterBias[i], 0.0, 0.0, 0.0, 0.0);
1051    }
1052    ASSIGN_4V(ctx->Pixel.PostConvolutionScale, 1.0, 1.0, 1.0, 1.0);
1053    ASSIGN_4V(ctx->Pixel.PostConvolutionBias, 0.0, 0.0, 0.0, 0.0);
1054
1055    /* Point group */
1056    ctx->Point.SmoothFlag = GL_FALSE;
1057    ctx->Point.Size = 1.0;
1058    ctx->Point.Params[0] = 1.0;
1059    ctx->Point.Params[1] = 0.0;
1060    ctx->Point.Params[2] = 0.0;
1061    ctx->Point.Attenuated = GL_FALSE;
1062    ctx->Point.MinSize = 0.0;
1063    ctx->Point.MaxSize = (GLfloat) MAX_POINT_SIZE;
1064    ctx->Point.Threshold = 1.0;
1065
1066    /* Polygon group */
1067    ctx->Polygon.CullFlag = GL_FALSE;
1068    ctx->Polygon.CullFaceMode = GL_BACK;
1069    ctx->Polygon.FrontFace = GL_CCW;
1070    ctx->Polygon.FrontBit = 0;
1071    ctx->Polygon.FrontMode = GL_FILL;
1072    ctx->Polygon.BackMode = GL_FILL;
1073    ctx->Polygon.Unfilled = GL_FALSE;
1074    ctx->Polygon.SmoothFlag = GL_FALSE;
1075    ctx->Polygon.StippleFlag = GL_FALSE;
1076    ctx->Polygon.OffsetFactor = 0.0F;
1077    ctx->Polygon.OffsetUnits = 0.0F;
1078    ctx->Polygon.OffsetPoint = GL_FALSE;
1079    ctx->Polygon.OffsetLine = GL_FALSE;
1080    ctx->Polygon.OffsetFill = GL_FALSE;
1081
1082    /* Polygon Stipple group */
1083    MEMSET( ctx->PolygonStipple, 0xff, 32*sizeof(GLuint) );
1084
1085    /* Scissor group */
1086    ctx->Scissor.Enabled = GL_FALSE;
1087    ctx->Scissor.X = 0;
1088    ctx->Scissor.Y = 0;
1089    ctx->Scissor.Width = 0;
1090    ctx->Scissor.Height = 0;
1091
1092    /* Stencil group */
1093    ctx->Stencil.Enabled = GL_FALSE;
1094    ctx->Stencil.Function = GL_ALWAYS;
1095    ctx->Stencil.FailFunc = GL_KEEP;
1096    ctx->Stencil.ZPassFunc = GL_KEEP;
1097    ctx->Stencil.ZFailFunc = GL_KEEP;
1098    ctx->Stencil.Ref = 0;
1099    ctx->Stencil.ValueMask = STENCIL_MAX;
1100    ctx->Stencil.Clear = 0;
1101    ctx->Stencil.WriteMask = STENCIL_MAX;
1102
1103    /* Texture group */
1104    ctx->Texture.CurrentUnit = 0;      /* multitexture */
1105    ctx->Texture.CurrentTransformUnit = 0; /* multitexture */
1106    ctx->Texture.Enabled = 0;
1107    for (i=0; i<MAX_TEXTURE_UNITS; i++)
1108       init_texture_unit( ctx, i );
1109    _mesa_init_colortable(&ctx->Texture.Palette);
1110
1111    /* Transformation group */
1112    ctx->Transform.MatrixMode = GL_MODELVIEW;
1113    ctx->Transform.Normalize = GL_FALSE;
1114    ctx->Transform.RescaleNormals = GL_FALSE;
1115    for (i=0;i<MAX_CLIP_PLANES;i++) {
1116       ctx->Transform.ClipEnabled[i] = GL_FALSE;
1117       ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 );
1118    }
1119    ctx->Transform.AnyClip = GL_FALSE;
1120
1121    /* Viewport group */
1122    ctx->Viewport.X = 0;
1123    ctx->Viewport.Y = 0;
1124    ctx->Viewport.Width = 0;
1125    ctx->Viewport.Height = 0;
1126    ctx->Viewport.Near = 0.0;
1127    ctx->Viewport.Far = 1.0;
1128    gl_matrix_ctr(&ctx->Viewport.WindowMap);
1129
1130 #define Sz 10
1131 #define Tz 14
1132    ctx->Viewport.WindowMap.m[Sz] = 0.5 * ctx->Visual->DepthMaxF;
1133    ctx->Viewport.WindowMap.m[Tz] = 0.5 * ctx->Visual->DepthMaxF;
1134 #undef Sz
1135 #undef Tz
1136
1137    ctx->Viewport.WindowMap.flags = MAT_FLAG_GENERAL_SCALE|MAT_FLAG_TRANSLATION;
1138    ctx->Viewport.WindowMap.type = MATRIX_3D_NO_ROT;
1139
1140    /* Vertex arrays */
1141    ctx->Array.Vertex.Size = 4;
1142    ctx->Array.Vertex.Type = GL_FLOAT;
1143    ctx->Array.Vertex.Stride = 0;
1144    ctx->Array.Vertex.StrideB = 0;
1145    ctx->Array.Vertex.Ptr = NULL;
1146    ctx->Array.Vertex.Enabled = GL_FALSE;
1147    ctx->Array.Normal.Type = GL_FLOAT;
1148    ctx->Array.Normal.Stride = 0;
1149    ctx->Array.Normal.StrideB = 0;
1150    ctx->Array.Normal.Ptr = NULL;
1151    ctx->Array.Normal.Enabled = GL_FALSE;
1152    ctx->Array.Color.Size = 4;
1153    ctx->Array.Color.Type = GL_FLOAT;
1154    ctx->Array.Color.Stride = 0;
1155    ctx->Array.Color.StrideB = 0;
1156    ctx->Array.Color.Ptr = NULL;
1157    ctx->Array.Color.Enabled = GL_FALSE;
1158    ctx->Array.Index.Type = GL_FLOAT;
1159    ctx->Array.Index.Stride = 0;
1160    ctx->Array.Index.StrideB = 0;
1161    ctx->Array.Index.Ptr = NULL;
1162    ctx->Array.Index.Enabled = GL_FALSE;
1163    for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
1164       ctx->Array.TexCoord[i].Size = 4;
1165       ctx->Array.TexCoord[i].Type = GL_FLOAT;
1166       ctx->Array.TexCoord[i].Stride = 0;
1167       ctx->Array.TexCoord[i].StrideB = 0;
1168       ctx->Array.TexCoord[i].Ptr = NULL;
1169       ctx->Array.TexCoord[i].Enabled = GL_FALSE;
1170    }
1171    ctx->Array.TexCoordInterleaveFactor = 1;
1172    ctx->Array.EdgeFlag.Stride = 0;
1173    ctx->Array.EdgeFlag.StrideB = 0;
1174    ctx->Array.EdgeFlag.Ptr = NULL;
1175    ctx->Array.EdgeFlag.Enabled = GL_FALSE;
1176    ctx->Array.ActiveTexture = 0;   /* GL_ARB_multitexture */
1177
1178    /* Pixel transfer */
1179    ctx->Pack.Alignment = 4;
1180    ctx->Pack.RowLength = 0;
1181    ctx->Pack.ImageHeight = 0;
1182    ctx->Pack.SkipPixels = 0;
1183    ctx->Pack.SkipRows = 0;
1184    ctx->Pack.SkipImages = 0;
1185    ctx->Pack.SwapBytes = GL_FALSE;
1186    ctx->Pack.LsbFirst = GL_FALSE;
1187    ctx->Unpack.Alignment = 4;
1188    ctx->Unpack.RowLength = 0;
1189    ctx->Unpack.ImageHeight = 0;
1190    ctx->Unpack.SkipPixels = 0;
1191    ctx->Unpack.SkipRows = 0;
1192    ctx->Unpack.SkipImages = 0;
1193    ctx->Unpack.SwapBytes = GL_FALSE;
1194    ctx->Unpack.LsbFirst = GL_FALSE;
1195
1196    /* Feedback */
1197    ctx->Feedback.Type = GL_2D;   /* TODO: verify */
1198    ctx->Feedback.Buffer = NULL;
1199    ctx->Feedback.BufferSize = 0;
1200    ctx->Feedback.Count = 0;
1201
1202    /* Selection/picking */
1203    ctx->Select.Buffer = NULL;
1204    ctx->Select.BufferSize = 0;
1205    ctx->Select.BufferCount = 0;
1206    ctx->Select.Hits = 0;
1207    ctx->Select.NameStackDepth = 0;
1208
1209    /* Optimized Accum buffer */
1210    ctx->IntegerAccumMode = GL_TRUE;
1211    ctx->IntegerAccumScaler = 0.0;
1212
1213    /* Renderer and client attribute stacks */
1214    ctx->AttribStackDepth = 0;
1215    ctx->ClientAttribStackDepth = 0;
1216
1217    /* Display list */
1218    ctx->CallDepth = 0;
1219    ctx->ExecuteFlag = GL_TRUE;
1220    ctx->CompileFlag = GL_FALSE;
1221    ctx->CurrentListPtr = NULL;
1222    ctx->CurrentBlock = NULL;
1223    ctx->CurrentListNum = 0;
1224    ctx->CurrentPos = 0;
1225
1226    /* Color tables */
1227    _mesa_init_colortable(&ctx->ColorTable);
1228    _mesa_init_colortable(&ctx->ProxyColorTable);
1229    _mesa_init_colortable(&ctx->PostConvolutionColorTable);
1230    _mesa_init_colortable(&ctx->ProxyPostConvolutionColorTable);
1231    _mesa_init_colortable(&ctx->PostColorMatrixColorTable);
1232    _mesa_init_colortable(&ctx->ProxyPostColorMatrixColorTable);
1233
1234    /* Miscellaneous */
1235    ctx->NewState = NEW_ALL;
1236    ctx->RenderMode = GL_RENDER;
1237    ctx->StippleCounter = 0;
1238    ctx->NeedNormals = GL_FALSE;
1239    ctx->DoViewportMapping = GL_TRUE;
1240
1241    ctx->NeedEyeCoords = GL_FALSE;
1242    ctx->NeedEyeNormals = GL_FALSE;
1243    ctx->vb_proj_matrix = &ctx->ModelProjectMatrix;
1244
1245    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
1246
1247    ctx->CatchSignals = GL_TRUE;
1248    ctx->OcclusionResult = GL_FALSE;
1249    ctx->OcclusionResultSaved = GL_FALSE;
1250
1251    /* For debug/development only */
1252    ctx->NoRaster = getenv("MESA_NO_RASTER") ? GL_TRUE : GL_FALSE;
1253    ctx->FirstTimeCurrent = GL_TRUE;
1254
1255    /* Dither disable */
1256    ctx->NoDither = getenv("MESA_NO_DITHER") ? GL_TRUE : GL_FALSE;
1257    if (ctx->NoDither) {
1258       if (getenv("MESA_DEBUG")) {
1259          fprintf(stderr, "MESA_NO_DITHER set - dithering disabled\n");
1260       }
1261       ctx->Color.DitherFlag = GL_FALSE;
1262    }
1263 }
1264
1265
1266
1267
1268 /*
1269  * Allocate the proxy textures.  If we run out of memory part way through
1270  * the allocations clean up and return GL_FALSE.
1271  * Return:  GL_TRUE=success, GL_FALSE=failure
1272  */
1273 static GLboolean
1274 alloc_proxy_textures( GLcontext *ctx )
1275 {
1276    GLboolean out_of_memory;
1277    GLint i;
1278
1279    ctx->Texture.Proxy1D = gl_alloc_texture_object(NULL, 0, 1);
1280    if (!ctx->Texture.Proxy1D) {
1281       return GL_FALSE;
1282    }
1283
1284    ctx->Texture.Proxy2D = gl_alloc_texture_object(NULL, 0, 2);
1285    if (!ctx->Texture.Proxy2D) {
1286       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1287       return GL_FALSE;
1288    }
1289
1290    ctx->Texture.Proxy3D = gl_alloc_texture_object(NULL, 0, 3);
1291    if (!ctx->Texture.Proxy3D) {
1292       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1293       gl_free_texture_object(NULL, ctx->Texture.Proxy2D);
1294       return GL_FALSE;
1295    }
1296
1297    out_of_memory = GL_FALSE;
1298    for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
1299       ctx->Texture.Proxy1D->Image[i] = _mesa_alloc_texture_image();
1300       ctx->Texture.Proxy2D->Image[i] = _mesa_alloc_texture_image();
1301       ctx->Texture.Proxy3D->Image[i] = _mesa_alloc_texture_image();
1302       if (!ctx->Texture.Proxy1D->Image[i]
1303           || !ctx->Texture.Proxy2D->Image[i]
1304           || !ctx->Texture.Proxy3D->Image[i]) {
1305          out_of_memory = GL_TRUE;
1306       }
1307    }
1308    if (out_of_memory) {
1309       for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
1310          if (ctx->Texture.Proxy1D->Image[i]) {
1311             _mesa_free_texture_image(ctx->Texture.Proxy1D->Image[i]);
1312          }
1313          if (ctx->Texture.Proxy2D->Image[i]) {
1314             _mesa_free_texture_image(ctx->Texture.Proxy2D->Image[i]);
1315          }
1316          if (ctx->Texture.Proxy3D->Image[i]) {
1317             _mesa_free_texture_image(ctx->Texture.Proxy3D->Image[i]);
1318          }
1319       }
1320       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1321       gl_free_texture_object(NULL, ctx->Texture.Proxy2D);
1322       gl_free_texture_object(NULL, ctx->Texture.Proxy3D);
1323       return GL_FALSE;
1324    }
1325    else {
1326       return GL_TRUE;
1327    }
1328 }
1329
1330
1331
1332 /*
1333  * Initialize a GLcontext struct.
1334  */
1335 GLboolean
1336 _mesa_initialize_context( GLcontext *ctx,
1337                           GLvisual *visual,
1338                           GLcontext *share_list,
1339                           void *driver_ctx,
1340                           GLboolean direct )
1341 {
1342    (void) direct;  /* not used */
1343
1344    /* misc one-time initializations */
1345    one_time_init();
1346
1347    ctx->DriverCtx = driver_ctx;
1348    ctx->Visual = visual;
1349    ctx->DrawBuffer = NULL;
1350    ctx->ReadBuffer = NULL;
1351
1352    ctx->VB = gl_vb_create_for_immediate( ctx );
1353    if (!ctx->VB) {
1354       FREE( ctx );
1355       return GL_FALSE;
1356    }
1357    ctx->input = ctx->VB->IM;
1358
1359    ctx->PB = gl_alloc_pb();
1360    if (!ctx->PB) {
1361       FREE( ctx->VB );
1362       FREE( ctx );
1363       return GL_FALSE;
1364    }
1365
1366    if (share_list) {
1367       /* share the group of display lists of another context */
1368       ctx->Shared = share_list->Shared;
1369    }
1370    else {
1371       /* allocate new group of display lists */
1372       ctx->Shared = alloc_shared_state();
1373       if (!ctx->Shared) {
1374          FREE(ctx->VB);
1375          FREE(ctx->PB);
1376          FREE(ctx);
1377          return GL_FALSE;
1378       }
1379    }
1380    _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1381    ctx->Shared->RefCount++;
1382    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1383
1384    init_attrib_groups( ctx );
1385
1386    gl_reset_vb( ctx->VB );
1387    gl_reset_input( ctx );
1388
1389    if (visual->DBflag) {
1390       ctx->Color.DrawBuffer = GL_BACK;
1391       ctx->Color.DriverDrawBuffer = GL_BACK_LEFT;
1392       ctx->Color.DrawDestMask = BACK_LEFT_BIT;
1393       ctx->Pixel.ReadBuffer = GL_BACK;
1394       ctx->Pixel.DriverReadBuffer = GL_BACK_LEFT;
1395    }
1396    else {
1397       ctx->Color.DrawBuffer = GL_FRONT;
1398       ctx->Color.DriverDrawBuffer = GL_FRONT_LEFT;
1399       ctx->Color.DrawDestMask = FRONT_LEFT_BIT;
1400       ctx->Pixel.ReadBuffer = GL_FRONT;
1401       ctx->Pixel.DriverReadBuffer = GL_FRONT_LEFT;
1402    }
1403
1404    if (!alloc_proxy_textures(ctx)) {
1405       free_shared_state(ctx, ctx->Shared);
1406       FREE(ctx->VB);
1407       FREE(ctx->PB);
1408       FREE(ctx);
1409       return GL_FALSE;
1410    }
1411
1412    /* setup API dispatch tables */
1413    ctx->Exec = (struct _glapi_table *) CALLOC(_glapi_get_dispatch_table_size() * sizeof(void *));
1414    ctx->Save = (struct _glapi_table *) CALLOC(_glapi_get_dispatch_table_size() * sizeof(void *));
1415    if (!ctx->Exec || !ctx->Save) {
1416       free_shared_state(ctx, ctx->Shared);
1417       FREE(ctx->VB);
1418       FREE(ctx->PB);
1419       if (ctx->Exec)
1420          FREE(ctx->Exec);
1421       FREE(ctx);
1422    }
1423    _mesa_init_exec_table( ctx->Exec );
1424    _mesa_init_dlist_table( ctx->Save );
1425    ctx->CurrentDispatch = ctx->Exec;
1426
1427    return GL_TRUE;
1428 }
1429
1430
1431
1432 /*
1433  * Allocate and initialize a GLcontext structure.
1434  * Input:  visual - a GLvisual pointer
1435  *         sharelist - another context to share display lists with or NULL
1436  *         driver_ctx - pointer to device driver's context state struct
1437  * Return:  pointer to a new gl_context struct or NULL if error.
1438  */
1439 GLcontext *
1440 gl_create_context( GLvisual *visual,
1441                    GLcontext *share_list,
1442                    void *driver_ctx,
1443                    GLboolean direct )
1444 {
1445    GLcontext *ctx = (GLcontext *) CALLOC( sizeof(GLcontext) );
1446    if (!ctx) {
1447       return NULL;
1448    }
1449
1450    if (_mesa_initialize_context(ctx, visual, share_list, driver_ctx, direct)) {
1451       return ctx;
1452    }
1453    else {
1454       FREE(ctx);
1455       return NULL;
1456    }
1457 }
1458
1459
1460
1461 /*
1462  * Free the data associated with the given context.
1463  * But don't free() the GLcontext struct itself!
1464  */
1465 void
1466 gl_free_context_data( GLcontext *ctx )
1467 {
1468    struct gl_shine_tab *s, *tmps;
1469    GLuint i, j;
1470
1471    /* if we're destroying the current context, unbind it first */
1472    if (ctx == gl_get_current_context()) {
1473       gl_make_current(NULL, NULL);
1474    }
1475
1476    gl_matrix_dtr( &ctx->ModelView );
1477    for (i = 0; i < MAX_MODELVIEW_STACK_DEPTH - 1; i++) {
1478       gl_matrix_dtr( &ctx->ModelViewStack[i] );
1479    }
1480    gl_matrix_dtr( &ctx->ProjectionMatrix );
1481    for (i = 0; i < MAX_PROJECTION_STACK_DEPTH - 1; i++) {
1482       gl_matrix_dtr( &ctx->ProjectionStack[i] );
1483    }
1484    for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
1485       gl_matrix_dtr( &ctx->TextureMatrix[i] );
1486       for (j = 0; j < MAX_TEXTURE_STACK_DEPTH - 1; j++) {
1487          gl_matrix_dtr( &ctx->TextureStack[i][j] );
1488       }
1489    }
1490
1491    FREE( ctx->PB );
1492
1493    if (ctx->input != ctx->VB->IM)
1494       gl_immediate_free( ctx->input );
1495
1496    gl_vb_free( ctx->VB );
1497
1498    _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1499    ctx->Shared->RefCount--;
1500    assert(ctx->Shared->RefCount >= 0);
1501    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1502    if (ctx->Shared->RefCount == 0) {
1503       /* free shared state */
1504       free_shared_state( ctx, ctx->Shared );
1505    }
1506
1507    foreach_s( s, tmps, ctx->ShineTabList ) {
1508       FREE( s );
1509    }
1510    FREE( ctx->ShineTabList );
1511
1512    /* Free proxy texture objects */
1513    gl_free_texture_object( NULL, ctx->Texture.Proxy1D );
1514    gl_free_texture_object( NULL, ctx->Texture.Proxy2D );
1515    gl_free_texture_object( NULL, ctx->Texture.Proxy3D );
1516
1517    /* Free evaluator data */
1518    if (ctx->EvalMap.Map1Vertex3.Points)
1519       FREE( ctx->EvalMap.Map1Vertex3.Points );
1520    if (ctx->EvalMap.Map1Vertex4.Points)
1521       FREE( ctx->EvalMap.Map1Vertex4.Points );
1522    if (ctx->EvalMap.Map1Index.Points)
1523       FREE( ctx->EvalMap.Map1Index.Points );
1524    if (ctx->EvalMap.Map1Color4.Points)
1525       FREE( ctx->EvalMap.Map1Color4.Points );
1526    if (ctx->EvalMap.Map1Normal.Points)
1527       FREE( ctx->EvalMap.Map1Normal.Points );
1528    if (ctx->EvalMap.Map1Texture1.Points)
1529       FREE( ctx->EvalMap.Map1Texture1.Points );
1530    if (ctx->EvalMap.Map1Texture2.Points)
1531       FREE( ctx->EvalMap.Map1Texture2.Points );
1532    if (ctx->EvalMap.Map1Texture3.Points)
1533       FREE( ctx->EvalMap.Map1Texture3.Points );
1534    if (ctx->EvalMap.Map1Texture4.Points)
1535       FREE( ctx->EvalMap.Map1Texture4.Points );
1536
1537    if (ctx->EvalMap.Map2Vertex3.Points)
1538       FREE( ctx->EvalMap.Map2Vertex3.Points );
1539    if (ctx->EvalMap.Map2Vertex4.Points)
1540       FREE( ctx->EvalMap.Map2Vertex4.Points );
1541    if (ctx->EvalMap.Map2Index.Points)
1542       FREE( ctx->EvalMap.Map2Index.Points );
1543    if (ctx->EvalMap.Map2Color4.Points)
1544       FREE( ctx->EvalMap.Map2Color4.Points );
1545    if (ctx->EvalMap.Map2Normal.Points)
1546       FREE( ctx->EvalMap.Map2Normal.Points );
1547    if (ctx->EvalMap.Map2Texture1.Points)
1548       FREE( ctx->EvalMap.Map2Texture1.Points );
1549    if (ctx->EvalMap.Map2Texture2.Points)
1550       FREE( ctx->EvalMap.Map2Texture2.Points );
1551    if (ctx->EvalMap.Map2Texture3.Points)
1552       FREE( ctx->EvalMap.Map2Texture3.Points );
1553    if (ctx->EvalMap.Map2Texture4.Points)
1554       FREE( ctx->EvalMap.Map2Texture4.Points );
1555
1556    _mesa_free_colortable_data( &ctx->ColorTable );
1557    _mesa_free_colortable_data( &ctx->PostConvolutionColorTable );
1558    _mesa_free_colortable_data( &ctx->PostColorMatrixColorTable );
1559    _mesa_free_colortable_data( &ctx->Texture.Palette );
1560
1561    /* Free cache of immediate buffers. */
1562    while (ctx->nr_im_queued-- > 0) {
1563       struct immediate * next = ctx->freed_im_queue->next;
1564       FREE( ctx->freed_im_queue );
1565       ctx->freed_im_queue = next;
1566    }
1567    gl_extensions_dtr(ctx);
1568
1569    FREE(ctx->Exec);
1570    FREE(ctx->Save);
1571 }
1572
1573
1574
1575 /*
1576  * Destroy a GLcontext structure.
1577  */
1578 void
1579 gl_destroy_context( GLcontext *ctx )
1580 {
1581    if (ctx) {
1582       gl_free_context_data(ctx);
1583       FREE( (void *) ctx );
1584    }
1585 }
1586
1587
1588
1589 /*
1590  * Called by the driver after both the context and driver are fully
1591  * initialized.  Currently just reads the config file.
1592  */
1593 void
1594 gl_context_initialize( GLcontext *ctx )
1595 {
1596    gl_read_config_file( ctx );
1597 }
1598
1599
1600
1601 /*
1602  * Copy attribute groups from one context to another.
1603  * Input:  src - source context
1604  *         dst - destination context
1605  *         mask - bitwise OR of GL_*_BIT flags
1606  */
1607 void
1608 gl_copy_context( const GLcontext *src, GLcontext *dst, GLuint mask )
1609 {
1610    if (mask & GL_ACCUM_BUFFER_BIT) {
1611       MEMCPY( &dst->Accum, &src->Accum, sizeof(struct gl_accum_attrib) );
1612    }
1613    if (mask & GL_COLOR_BUFFER_BIT) {
1614       MEMCPY( &dst->Color, &src->Color, sizeof(struct gl_colorbuffer_attrib) );
1615    }
1616    if (mask & GL_CURRENT_BIT) {
1617       MEMCPY( &dst->Current, &src->Current, sizeof(struct gl_current_attrib) );
1618    }
1619    if (mask & GL_DEPTH_BUFFER_BIT) {
1620       MEMCPY( &dst->Depth, &src->Depth, sizeof(struct gl_depthbuffer_attrib) );
1621    }
1622    if (mask & GL_ENABLE_BIT) {
1623       /* no op */
1624    }
1625    if (mask & GL_EVAL_BIT) {
1626       MEMCPY( &dst->Eval, &src->Eval, sizeof(struct gl_eval_attrib) );
1627    }
1628    if (mask & GL_FOG_BIT) {
1629       MEMCPY( &dst->Fog, &src->Fog, sizeof(struct gl_fog_attrib) );
1630    }
1631    if (mask & GL_HINT_BIT) {
1632       MEMCPY( &dst->Hint, &src->Hint, sizeof(struct gl_hint_attrib) );
1633    }
1634    if (mask & GL_LIGHTING_BIT) {
1635       MEMCPY( &dst->Light, &src->Light, sizeof(struct gl_light_attrib) );
1636       /*       gl_reinit_light_attrib( &dst->Light ); */
1637    }
1638    if (mask & GL_LINE_BIT) {
1639       MEMCPY( &dst->Line, &src->Line, sizeof(struct gl_line_attrib) );
1640    }
1641    if (mask & GL_LIST_BIT) {
1642       MEMCPY( &dst->List, &src->List, sizeof(struct gl_list_attrib) );
1643    }
1644    if (mask & GL_PIXEL_MODE_BIT) {
1645       MEMCPY( &dst->Pixel, &src->Pixel, sizeof(struct gl_pixel_attrib) );
1646    }
1647    if (mask & GL_POINT_BIT) {
1648       MEMCPY( &dst->Point, &src->Point, sizeof(struct gl_point_attrib) );
1649    }
1650    if (mask & GL_POLYGON_BIT) {
1651       MEMCPY( &dst->Polygon, &src->Polygon, sizeof(struct gl_polygon_attrib) );
1652    }
1653    if (mask & GL_POLYGON_STIPPLE_BIT) {
1654       /* Use loop instead of MEMCPY due to problem with Portland Group's
1655        * C compiler.  Reported by John Stone.
1656        */
1657       int i;
1658       for (i=0;i<32;i++) {
1659          dst->PolygonStipple[i] = src->PolygonStipple[i];
1660       }
1661    }
1662    if (mask & GL_SCISSOR_BIT) {
1663       MEMCPY( &dst->Scissor, &src->Scissor, sizeof(struct gl_scissor_attrib) );
1664    }
1665    if (mask & GL_STENCIL_BUFFER_BIT) {
1666       MEMCPY( &dst->Stencil, &src->Stencil, sizeof(struct gl_stencil_attrib) );
1667    }
1668    if (mask & GL_TEXTURE_BIT) {
1669       MEMCPY( &dst->Texture, &src->Texture, sizeof(struct gl_texture_attrib) );
1670    }
1671    if (mask & GL_TRANSFORM_BIT) {
1672       MEMCPY( &dst->Transform, &src->Transform, sizeof(struct gl_transform_attrib) );
1673    }
1674    if (mask & GL_VIEWPORT_BIT) {
1675       MEMCPY( &dst->Viewport, &src->Viewport, sizeof(struct gl_viewport_attrib) );
1676    }
1677 }
1678
1679
1680 /*
1681  * Set the current context, binding the given frame buffer to the context.
1682  */
1683 void gl_make_current( GLcontext *newCtx, GLframebuffer *buffer )
1684 {
1685    gl_make_current2( newCtx, buffer, buffer );
1686 }
1687
1688
1689 /*
1690  * Bind the given context to the given draw-buffer and read-buffer
1691  * and make it the current context for this thread.
1692  */
1693 void gl_make_current2( GLcontext *newCtx, GLframebuffer *drawBuffer,
1694                        GLframebuffer *readBuffer )
1695 {
1696 #if 0
1697    GLcontext *oldCtx = gl_get_context();
1698
1699    /* Flush the old context
1700     */
1701    if (oldCtx) {
1702       ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(oldCtx, "gl_make_current");
1703
1704       /* unbind frame buffers from context */
1705       if (oldCtx->DrawBuffer) {
1706          oldCtx->DrawBuffer = NULL;
1707       }
1708       if (oldCtx->ReadBuffer) {
1709          oldCtx->ReadBuffer = NULL;
1710       }
1711    }
1712 #endif
1713
1714    /* We call this function periodically (just here for now) in
1715     * order to detect when multithreading has begun.
1716     */
1717    _glapi_check_multithread();
1718
1719    _glapi_set_context((void *) newCtx);
1720    ASSERT(gl_get_current_context() == newCtx);
1721    if (newCtx) {
1722       SET_IMMEDIATE(newCtx, newCtx->input);
1723       _glapi_set_dispatch(newCtx->CurrentDispatch);
1724    }
1725    else {
1726       _glapi_set_dispatch(NULL);  /* none current */
1727    }
1728
1729    if (MESA_VERBOSE) fprintf(stderr, "gl_make_current()\n");
1730
1731    if (newCtx && drawBuffer && readBuffer) {
1732       /* TODO: check if newCtx and buffer's visual match??? */
1733       newCtx->DrawBuffer = drawBuffer;
1734       newCtx->ReadBuffer = readBuffer;
1735       newCtx->NewState = NEW_ALL;   /* just to be safe */
1736       gl_update_state( newCtx );
1737    }
1738
1739    /* We can use this to help debug user's problems.  Tell the to set
1740     * the MESA_INFO env variable before running their app.  Then the
1741     * first time each context is made current we'll print some useful
1742     * information.
1743     */
1744    if (newCtx && newCtx->FirstTimeCurrent) {
1745       if (getenv("MESA_INFO")) {
1746          fprintf(stderr, "Mesa GL_VERSION = %s\n", (char *) _mesa_GetString(GL_VERSION));
1747          fprintf(stderr, "Mesa GL_RENDERER = %s\n", (char *) _mesa_GetString(GL_RENDERER));
1748          fprintf(stderr, "Mesa GL_VENDOR = %s\n", (char *) _mesa_GetString(GL_VENDOR));
1749          fprintf(stderr, "Mesa GL_EXTENSIONS = %s\n", (char *) _mesa_GetString(GL_EXTENSIONS));
1750 #if defined(THREADS)
1751          fprintf(stderr, "Mesa thread-safe: YES\n");
1752 #else
1753          fprintf(stderr, "Mesa thread-safe: NO\n");
1754 #endif
1755 #if defined(USE_X86_ASM)
1756          fprintf(stderr, "Mesa x86-optimized: YES\n");
1757 #else
1758          fprintf(stderr, "Mesa x86-optimized: NO\n");
1759 #endif
1760       }
1761       newCtx->FirstTimeCurrent = GL_FALSE;
1762    }
1763 }
1764
1765
1766
1767 /*
1768  * Return current context handle for the calling thread.
1769  * This isn't the fastest way to get the current context.
1770  * If you need speed, see the GET_CURRENT_CONTEXT() macro in context.h
1771  */
1772 GLcontext *gl_get_current_context( void )
1773 {
1774    return (GLcontext *) _glapi_get_context();
1775 }
1776
1777
1778
1779 /*
1780  * This should be called by device drivers just before they do a
1781  * swapbuffers.  Any pending rendering commands will be executed.
1782  */
1783 void
1784 _mesa_swapbuffers(GLcontext *ctx)
1785 {
1786    FLUSH_VB( ctx, "swap buffers" );
1787 }
1788
1789
1790
1791 /*
1792  * Return pointer to this context's current API dispatch table.
1793  * It'll either be the immediate-mode execute dispatcher or the
1794  * display list compile dispatcher.
1795  */
1796 struct _glapi_table *
1797 _mesa_get_dispatch(GLcontext *ctx)
1798 {
1799    return ctx->CurrentDispatch;
1800 }
1801
1802
1803
1804 /**********************************************************************/
1805 /*****                Miscellaneous functions                     *****/
1806 /**********************************************************************/
1807
1808
1809 /*
1810  * This function is called when the Mesa user has stumbled into a code
1811  * path which may not be implemented fully or correctly.
1812  */
1813 void gl_problem( const GLcontext *ctx, const char *s )
1814 {
1815    fprintf( stderr, "Mesa implementation error: %s\n", s );
1816    fprintf( stderr, "Report to mesa-bugs@mesa3d.org\n" );
1817    (void) ctx;
1818 }
1819
1820
1821
1822 /*
1823  * This is called to inform the user that he or she has tried to do
1824  * something illogical or if there's likely a bug in their program
1825  * (like enabled depth testing without a depth buffer).
1826  */
1827 void gl_warning( const GLcontext *ctx, const char *s )
1828 {
1829    GLboolean debug;
1830 #ifdef DEBUG
1831    debug = GL_TRUE;
1832 #else
1833    if (getenv("MESA_DEBUG")) {
1834       debug = GL_TRUE;
1835    }
1836    else {
1837       debug = GL_FALSE;
1838    }
1839 #endif
1840    if (debug) {
1841       fprintf( stderr, "Mesa warning: %s\n", s );
1842    }
1843    (void) ctx;
1844 }
1845
1846
1847
1848 /*
1849  * Compile an error into current display list.
1850  */
1851 void gl_compile_error( GLcontext *ctx, GLenum error, const char *s )
1852 {
1853    if (ctx->CompileFlag)
1854       gl_save_error( ctx, error, s );
1855
1856    if (ctx->ExecuteFlag)
1857       gl_error( ctx, error, s );
1858 }
1859
1860
1861
1862 /*
1863  * This is Mesa's error handler.  Normally, all that's done is the updating
1864  * of the current error value.  If Mesa is compiled with -DDEBUG or if the
1865  * environment variable "MESA_DEBUG" is defined then a real error message
1866  * is printed to stderr.
1867  * Input:  error - the error value
1868  *         s - a diagnostic string
1869  */
1870 void gl_error( GLcontext *ctx, GLenum error, const char *s )
1871 {
1872    GLboolean debug;
1873
1874 #ifdef DEBUG
1875    debug = GL_TRUE;
1876 #else
1877    if (getenv("MESA_DEBUG")) {
1878       debug = GL_TRUE;
1879    }
1880    else {
1881       debug = GL_FALSE;
1882    }
1883 #endif
1884
1885    if (debug) {
1886       char errstr[1000];
1887
1888       switch (error) {
1889          case GL_NO_ERROR:
1890             strcpy( errstr, "GL_NO_ERROR" );
1891             break;
1892          case GL_INVALID_VALUE:
1893             strcpy( errstr, "GL_INVALID_VALUE" );
1894             break;
1895          case GL_INVALID_ENUM:
1896             strcpy( errstr, "GL_INVALID_ENUM" );
1897             break;
1898          case GL_INVALID_OPERATION:
1899             strcpy( errstr, "GL_INVALID_OPERATION" );
1900             break;
1901          case GL_STACK_OVERFLOW:
1902             strcpy( errstr, "GL_STACK_OVERFLOW" );
1903             break;
1904          case GL_STACK_UNDERFLOW:
1905             strcpy( errstr, "GL_STACK_UNDERFLOW" );
1906             break;
1907          case GL_OUT_OF_MEMORY:
1908             strcpy( errstr, "GL_OUT_OF_MEMORY" );
1909             break;
1910          default:
1911             strcpy( errstr, "unknown" );
1912             break;
1913       }
1914       fprintf( stderr, "Mesa user error: %s in %s\n", errstr, s );
1915    }
1916
1917    if (ctx->ErrorValue==GL_NO_ERROR) {
1918       ctx->ErrorValue = error;
1919    }
1920
1921    /* Call device driver's error handler, if any.  This is used on the Mac. */
1922    if (ctx->Driver.Error) {
1923       (*ctx->Driver.Error)( ctx );
1924    }
1925 }
1926
1927
1928
1929 void
1930 _mesa_Finish( void )
1931 {
1932    GET_CURRENT_CONTEXT(ctx);
1933    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFinish");
1934    if (ctx->Driver.Finish) {
1935       (*ctx->Driver.Finish)( ctx );
1936    }
1937 }
1938
1939
1940
1941 void
1942 _mesa_Flush( void )
1943 {
1944    GET_CURRENT_CONTEXT(ctx);
1945    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFlush");
1946    if (ctx->Driver.Flush) {
1947       (*ctx->Driver.Flush)( ctx );
1948    }
1949 }