src/mesa/main/context.c

   1 /* $Id: context.c,v 1.65 2000/05/18 18:12:36 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.MaxTextureUnits = MAX_TEXTURE_UNITS;
 708    ctx->Const.MaxArrayLockSize = MAX_ARRAY_LOCK_SIZE;
 709    ctx->Const.SubPixelBits = SUB_PIXEL_BITS;
 710    ctx->Const.MinPointSize = MIN_POINT_SIZE;
 711    ctx->Const.MaxPointSize = MAX_POINT_SIZE;
 712    ctx->Const.MinPointSizeAA = MIN_POINT_SIZE;
 713    ctx->Const.MaxPointSizeAA = MAX_POINT_SIZE;
 714    ctx->Const.PointSizeGranularity = POINT_SIZE_GRANULARITY;
 715    ctx->Const.MinLineWidth = MIN_LINE_WIDTH;
 716    ctx->Const.MaxLineWidth = MAX_LINE_WIDTH;
 717    ctx->Const.MinLineWidthAA = MIN_LINE_WIDTH;
 718    ctx->Const.MaxLineWidthAA = MAX_LINE_WIDTH;
 719    ctx->Const.LineWidthGranularity = LINE_WIDTH_GRANULARITY;
 720    ctx->Const.NumAuxBuffers = NUM_AUX_BUFFERS;
 721    ctx->Const.MaxColorTableSize = MAX_COLOR_TABLE_SIZE;
 722    ctx->Const.MaxConvolutionWidth = MAX_CONVOLUTION_WIDTH;
 723    ctx->Const.MaxConvolutionHeight = MAX_CONVOLUTION_HEIGHT;
 724
 725    /* Modelview matrix */
 726    gl_matrix_ctr( &ctx->ModelView );
 727    gl_matrix_alloc_inv( &ctx->ModelView );
 728
 729    ctx->ModelViewStackDepth = 0;
 730    for (i = 0; i < MAX_MODELVIEW_STACK_DEPTH - 1; i++) {
 731       gl_matrix_ctr( &ctx->ModelViewStack[i] );
 732       gl_matrix_alloc_inv( &ctx->ModelViewStack[i] );
 733    }
 734
 735    /* Projection matrix - need inv for user clipping in clip space*/
 736    gl_matrix_ctr( &ctx->ProjectionMatrix );
 737    gl_matrix_alloc_inv( &ctx->ProjectionMatrix );
 738
 739    gl_matrix_ctr( &ctx->ModelProjectMatrix );
 740    gl_matrix_ctr( &ctx->ModelProjectWinMatrix );
 741    ctx->ModelProjectWinMatrixUptodate = GL_FALSE;
 742
 743    ctx->ProjectionStackDepth = 0;
 744    ctx->NearFarStack[0][0] = 1.0; /* These values seem weird by make */
 745    ctx->NearFarStack[0][1] = 0.0; /* sense mathematically. */
 746
 747    for (i = 0; i < MAX_PROJECTION_STACK_DEPTH - 1; i++) {
 748       gl_matrix_ctr( &ctx->ProjectionStack[i] );
 749       gl_matrix_alloc_inv( &ctx->ProjectionStack[i] );
 750    }
 751
 752    /* Texture matrix */
 753    for (i=0; i<MAX_TEXTURE_UNITS; i++) {
 754       gl_matrix_ctr( &ctx->TextureMatrix[i] );
 755       ctx->TextureStackDepth[i] = 0;
 756       for (j = 0; j < MAX_TEXTURE_STACK_DEPTH - 1; j++) {
 757          ctx->TextureStack[i][j].inv = 0;
 758       }
 759    }
 760
 761    /* Color matrix */
 762    gl_matrix_ctr(&ctx->ColorMatrix);
 763    ctx->ColorStackDepth = 0;
 764    for (j = 0; j < MAX_COLOR_STACK_DEPTH - 1; j++) {
 765       gl_matrix_ctr(&ctx->ColorStack[j]);
 766    }
 767
 768    /* Accumulate buffer group */
 769    ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 770
 771    /* Color buffer group */
 772    ctx->Color.IndexMask = 0xffffffff;
 773    ctx->Color.ColorMask[0] = 0xff;
 774    ctx->Color.ColorMask[1] = 0xff;
 775    ctx->Color.ColorMask[2] = 0xff;
 776    ctx->Color.ColorMask[3] = 0xff;
 777    ctx->Color.SWmasking = GL_FALSE;
 778    ctx->Color.ClearIndex = 0;
 779    ASSIGN_4V( ctx->Color.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 780    ctx->Color.DrawBuffer = GL_FRONT;
 781    ctx->Color.AlphaEnabled = GL_FALSE;
 782    ctx->Color.AlphaFunc = GL_ALWAYS;
 783    ctx->Color.AlphaRef = 0;
 784    ctx->Color.BlendEnabled = GL_FALSE;
 785    ctx->Color.BlendSrcRGB = GL_ONE;
 786    ctx->Color.BlendDstRGB = GL_ZERO;
 787    ctx->Color.BlendSrcA = GL_ONE;
 788    ctx->Color.BlendDstA = GL_ZERO;
 789    ctx->Color.BlendEquation = GL_FUNC_ADD_EXT;
 790    ctx->Color.BlendFunc = NULL;  /* this pointer set only when needed */
 791    ASSIGN_4V( ctx->Color.BlendColor, 0.0, 0.0, 0.0, 0.0 );
 792    ctx->Color.IndexLogicOpEnabled = GL_FALSE;
 793    ctx->Color.ColorLogicOpEnabled = GL_FALSE;
 794    ctx->Color.SWLogicOpEnabled = GL_FALSE;
 795    ctx->Color.LogicOp = GL_COPY;
 796    ctx->Color.DitherFlag = GL_TRUE;
 797    ctx->Color.MultiDrawBuffer = GL_FALSE;
 798
 799    /* Current group */
 800    ASSIGN_4V( ctx->Current.ByteColor, 255, 255, 255, 255);
 801    ctx->Current.Index = 1;
 802    for (i=0; i<MAX_TEXTURE_UNITS; i++)
 803       ASSIGN_4V( ctx->Current.Texcoord[i], 0.0, 0.0, 0.0, 1.0 );
 804    ASSIGN_4V( ctx->Current.RasterPos, 0.0, 0.0, 0.0, 1.0 );
 805    ctx->Current.RasterDistance = 0.0;
 806    ASSIGN_4V( ctx->Current.RasterColor, 1.0, 1.0, 1.0, 1.0 );
 807    ctx->Current.RasterIndex = 1;
 808    for (i=0; i<MAX_TEXTURE_UNITS; i++)
 809       ASSIGN_4V( ctx->Current.RasterMultiTexCoord[i], 0.0, 0.0, 0.0, 1.0 );
 810    ctx->Current.RasterTexCoord = ctx->Current.RasterMultiTexCoord[0];
 811    ctx->Current.RasterPosValid = GL_TRUE;
 812    ctx->Current.EdgeFlag = GL_TRUE;
 813    ASSIGN_3V( ctx->Current.Normal, 0.0, 0.0, 1.0 );
 814    ctx->Current.Primitive = (GLenum) (GL_POLYGON + 1);
 815
 816    ctx->Current.Flag = (VERT_NORM|VERT_INDEX|VERT_RGBA|VERT_EDGE|
 817                         VERT_TEX0_1|VERT_TEX1_1|VERT_MATERIAL);
 818
 819    init_fallback_arrays( ctx );
 820
 821    /* Depth buffer group */
 822    ctx->Depth.Test = GL_FALSE;
 823    ctx->Depth.Clear = 1.0;
 824    ctx->Depth.Func = GL_LESS;
 825    ctx->Depth.Mask = GL_TRUE;
 826    ctx->Depth.OcclusionTest = GL_FALSE;
 827
 828    /* Evaluators group */
 829    ctx->Eval.Map1Color4 = GL_FALSE;
 830    ctx->Eval.Map1Index = GL_FALSE;
 831    ctx->Eval.Map1Normal = GL_FALSE;
 832    ctx->Eval.Map1TextureCoord1 = GL_FALSE;
 833    ctx->Eval.Map1TextureCoord2 = GL_FALSE;
 834    ctx->Eval.Map1TextureCoord3 = GL_FALSE;
 835    ctx->Eval.Map1TextureCoord4 = GL_FALSE;
 836    ctx->Eval.Map1Vertex3 = GL_FALSE;
 837    ctx->Eval.Map1Vertex4 = GL_FALSE;
 838    ctx->Eval.Map2Color4 = GL_FALSE;
 839    ctx->Eval.Map2Index = GL_FALSE;
 840    ctx->Eval.Map2Normal = GL_FALSE;
 841    ctx->Eval.Map2TextureCoord1 = GL_FALSE;
 842    ctx->Eval.Map2TextureCoord2 = GL_FALSE;
 843    ctx->Eval.Map2TextureCoord3 = GL_FALSE;
 844    ctx->Eval.Map2TextureCoord4 = GL_FALSE;
 845    ctx->Eval.Map2Vertex3 = GL_FALSE;
 846    ctx->Eval.Map2Vertex4 = GL_FALSE;
 847    ctx->Eval.AutoNormal = GL_FALSE;
 848    ctx->Eval.MapGrid1un = 1;
 849    ctx->Eval.MapGrid1u1 = 0.0;
 850    ctx->Eval.MapGrid1u2 = 1.0;
 851    ctx->Eval.MapGrid2un = 1;
 852    ctx->Eval.MapGrid2vn = 1;
 853    ctx->Eval.MapGrid2u1 = 0.0;
 854    ctx->Eval.MapGrid2u2 = 1.0;
 855    ctx->Eval.MapGrid2v1 = 0.0;
 856    ctx->Eval.MapGrid2v2 = 1.0;
 857
 858    /* Evaluator data */
 859    {
 860       static GLfloat vertex[4] = { 0.0, 0.0, 0.0, 1.0 };
 861       static GLfloat normal[3] = { 0.0, 0.0, 1.0 };
 862       static GLfloat index[1] = { 1.0 };
 863       static GLfloat color[4] = { 1.0, 1.0, 1.0, 1.0 };
 864       static GLfloat texcoord[4] = { 0.0, 0.0, 0.0, 1.0 };
 865
 866       init_1d_map( &ctx->EvalMap.Map1Vertex3, 3, vertex );
 867       init_1d_map( &ctx->EvalMap.Map1Vertex4, 4, vertex );
 868       init_1d_map( &ctx->EvalMap.Map1Index, 1, index );
 869       init_1d_map( &ctx->EvalMap.Map1Color4, 4, color );
 870       init_1d_map( &ctx->EvalMap.Map1Normal, 3, normal );
 871       init_1d_map( &ctx->EvalMap.Map1Texture1, 1, texcoord );
 872       init_1d_map( &ctx->EvalMap.Map1Texture2, 2, texcoord );
 873       init_1d_map( &ctx->EvalMap.Map1Texture3, 3, texcoord );
 874       init_1d_map( &ctx->EvalMap.Map1Texture4, 4, texcoord );
 875
 876       init_2d_map( &ctx->EvalMap.Map2Vertex3, 3, vertex );
 877       init_2d_map( &ctx->EvalMap.Map2Vertex4, 4, vertex );
 878       init_2d_map( &ctx->EvalMap.Map2Index, 1, index );
 879       init_2d_map( &ctx->EvalMap.Map2Color4, 4, color );
 880       init_2d_map( &ctx->EvalMap.Map2Normal, 3, normal );
 881       init_2d_map( &ctx->EvalMap.Map2Texture1, 1, texcoord );
 882       init_2d_map( &ctx->EvalMap.Map2Texture2, 2, texcoord );
 883       init_2d_map( &ctx->EvalMap.Map2Texture3, 3, texcoord );
 884       init_2d_map( &ctx->EvalMap.Map2Texture4, 4, texcoord );
 885    }
 886
 887    /* Fog group */
 888    ctx->Fog.Enabled = GL_FALSE;
 889    ctx->Fog.Mode = GL_EXP;
 890    ASSIGN_4V( ctx->Fog.Color, 0.0, 0.0, 0.0, 0.0 );
 891    ctx->Fog.Index = 0.0;
 892    ctx->Fog.Density = 1.0;
 893    ctx->Fog.Start = 0.0;
 894    ctx->Fog.End = 1.0;
 895
 896    /* Hint group */
 897    ctx->Hint.PerspectiveCorrection = GL_DONT_CARE;
 898    ctx->Hint.PointSmooth = GL_DONT_CARE;
 899    ctx->Hint.LineSmooth = GL_DONT_CARE;
 900    ctx->Hint.PolygonSmooth = GL_DONT_CARE;
 901    ctx->Hint.Fog = GL_DONT_CARE;
 902
 903    ctx->Hint.AllowDrawWin = GL_TRUE;
 904    ctx->Hint.AllowDrawFrg = GL_TRUE;
 905    ctx->Hint.AllowDrawMem = GL_TRUE;
 906    ctx->Hint.StrictLighting = GL_TRUE;
 907
 908    /* Histogram group */
 909    ctx->Histogram.Width = 0;
 910    ctx->Histogram.Format = GL_RGBA;
 911    ctx->Histogram.Sink = GL_FALSE;
 912    ctx->Histogram.RedSize       = 0xffffffff;
 913    ctx->Histogram.GreenSize     = 0xffffffff;
 914    ctx->Histogram.BlueSize      = 0xffffffff;
 915    ctx->Histogram.AlphaSize     = 0xffffffff;
 916    ctx->Histogram.LuminanceSize = 0xffffffff;
 917    for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {
 918       ctx->Histogram.Count[i][0] = 0;
 919       ctx->Histogram.Count[i][1] = 0;
 920       ctx->Histogram.Count[i][2] = 0;
 921       ctx->Histogram.Count[i][3] = 0;
 922    }
 923
 924    /* Min/Max group */
 925    ctx->MinMax.Format = GL_RGBA;
 926    ctx->MinMax.Sink = GL_FALSE;
 927    ctx->MinMax.Min[RCOMP] = 1000;    ctx->MinMax.Max[RCOMP] = -1000;
 928    ctx->MinMax.Min[GCOMP] = 1000;    ctx->MinMax.Max[GCOMP] = -1000;
 929    ctx->MinMax.Min[BCOMP] = 1000;    ctx->MinMax.Max[BCOMP] = -1000;
 930    ctx->MinMax.Min[ACOMP] = 1000;    ctx->MinMax.Max[ACOMP] = -1000;
 931
 932
 933
 934    /* Pipeline */
 935    gl_pipeline_init( ctx );
 936    gl_cva_init( ctx );
 937
 938    /* Extensions */
 939    gl_extensions_ctr( ctx );
 940
 941    ctx->AllowVertexCull = CLIP_CULLED_BIT;
 942
 943    /* Lighting group */
 944    for (i=0;i<MAX_LIGHTS;i++) {
 945       init_light( &ctx->Light.Light[i], i );
 946    }
 947    make_empty_list( &ctx->Light.EnabledList );
 948
 949    init_lightmodel( &ctx->Light.Model );
 950    init_material( &ctx->Light.Material[0] );
 951    init_material( &ctx->Light.Material[1] );
 952    ctx->Light.ShadeModel = GL_SMOOTH;
 953    ctx->Light.Enabled = GL_FALSE;
 954    ctx->Light.ColorMaterialFace = GL_FRONT_AND_BACK;
 955    ctx->Light.ColorMaterialMode = GL_AMBIENT_AND_DIFFUSE;
 956    ctx->Light.ColorMaterialBitmask
 957       = gl_material_bitmask( ctx,
 958                              GL_FRONT_AND_BACK,
 959                              GL_AMBIENT_AND_DIFFUSE, ~0, 0 );
 960
 961    ctx->Light.ColorMaterialEnabled = GL_FALSE;
 962
 963    /* Lighting miscellaneous */
 964    ctx->ShineTabList = MALLOC_STRUCT( gl_shine_tab );
 965    make_empty_list( ctx->ShineTabList );
 966    for (i = 0 ; i < 10 ; i++) {
 967       struct gl_shine_tab *s = MALLOC_STRUCT( gl_shine_tab );
 968       s->shininess = -1;
 969       s->refcount = 0;
 970       insert_at_tail( ctx->ShineTabList, s );
 971    }
 972    for (i = 0 ; i < 4 ; i++) {
 973       ctx->ShineTable[i] = ctx->ShineTabList->prev;
 974       ctx->ShineTable[i]->refcount++;
 975    }
 976
 977
 978    /* Line group */
 979    ctx->Line.SmoothFlag = GL_FALSE;
 980    ctx->Line.StippleFlag = GL_FALSE;
 981    ctx->Line.Width = 1.0;
 982    ctx->Line.StipplePattern = 0xffff;
 983    ctx->Line.StippleFactor = 1;
 984
 985    /* Display List group */
 986    ctx->List.ListBase = 0;
 987
 988    /* Pixel group */
 989    ctx->Pixel.RedBias = 0.0;
 990    ctx->Pixel.RedScale = 1.0;
 991    ctx->Pixel.GreenBias = 0.0;
 992    ctx->Pixel.GreenScale = 1.0;
 993    ctx->Pixel.BlueBias = 0.0;
 994    ctx->Pixel.BlueScale = 1.0;
 995    ctx->Pixel.AlphaBias = 0.0;
 996    ctx->Pixel.AlphaScale = 1.0;
 997    ctx->Pixel.ScaleOrBiasRGBA = GL_FALSE;
 998    ctx->Pixel.DepthBias = 0.0;
 999    ctx->Pixel.DepthScale = 1.0;
1000    ctx->Pixel.IndexOffset = 0;
1001    ctx->Pixel.IndexShift = 0;
1002    ctx->Pixel.ZoomX = 1.0;
1003    ctx->Pixel.ZoomY = 1.0;
1004    ctx->Pixel.MapColorFlag = GL_FALSE;
1005    ctx->Pixel.MapStencilFlag = GL_FALSE;
1006    ctx->Pixel.MapStoSsize = 1;
1007    ctx->Pixel.MapItoIsize = 1;
1008    ctx->Pixel.MapItoRsize = 1;
1009    ctx->Pixel.MapItoGsize = 1;
1010    ctx->Pixel.MapItoBsize = 1;
1011    ctx->Pixel.MapItoAsize = 1;
1012    ctx->Pixel.MapRtoRsize = 1;
1013    ctx->Pixel.MapGtoGsize = 1;
1014    ctx->Pixel.MapBtoBsize = 1;
1015    ctx->Pixel.MapAtoAsize = 1;
1016    ctx->Pixel.MapStoS[0] = 0;
1017    ctx->Pixel.MapItoI[0] = 0;
1018    ctx->Pixel.MapItoR[0] = 0.0;
1019    ctx->Pixel.MapItoG[0] = 0.0;
1020    ctx->Pixel.MapItoB[0] = 0.0;
1021    ctx->Pixel.MapItoA[0] = 0.0;
1022    ctx->Pixel.MapItoR8[0] = 0;
1023    ctx->Pixel.MapItoG8[0] = 0;
1024    ctx->Pixel.MapItoB8[0] = 0;
1025    ctx->Pixel.MapItoA8[0] = 0;
1026    ctx->Pixel.MapRtoR[0] = 0.0;
1027    ctx->Pixel.MapGtoG[0] = 0.0;
1028    ctx->Pixel.MapBtoB[0] = 0.0;
1029    ctx->Pixel.MapAtoA[0] = 0.0;
1030    ctx->Pixel.HistogramEnabled = GL_FALSE;
1031    ctx->Pixel.MinMaxEnabled = GL_FALSE;
1032    ctx->Pixel.PixelTextureEnabled = GL_FALSE;
1033    ctx->Pixel.FragmentRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
1034    ctx->Pixel.FragmentAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
1035    ASSIGN_4V(ctx->Pixel.PostColorMatrixScale, 1.0, 1.0, 1.0, 1.0);
1036    ASSIGN_4V(ctx->Pixel.PostColorMatrixBias, 0.0, 0.0, 0.0, 0.0);
1037    ASSIGN_4V(ctx->Pixel.ColorTableScale, 1.0, 1.0, 1.0, 1.0);
1038    ASSIGN_4V(ctx->Pixel.ColorTableBias, 0.0, 0.0, 0.0, 0.0);
1039    ctx->Pixel.ColorTableEnabled = GL_FALSE;
1040    ctx->Pixel.PostConvolutionColorTableEnabled = GL_FALSE;
1041    ctx->Pixel.PostColorMatrixColorTableEnabled = GL_FALSE;
1042    ctx->Pixel.Convolution1DEnabled = GL_FALSE;
1043    ctx->Pixel.Convolution2DEnabled = GL_FALSE;
1044    ctx->Pixel.Separable2DEnabled = GL_FALSE;
1045    for (i = 0; i < 3; i++) {
1046       ASSIGN_4V(ctx->Pixel.ConvolutionBorderColor[i], 0.0, 0.0, 0.0, 0.0);
1047       ctx->Pixel.ConvolutionBorderMode[i] = GL_REDUCE;
1048       ASSIGN_4V(ctx->Pixel.ConvolutionFilterScale[i], 1.0, 1.0, 1.0, 1.0);
1049       ASSIGN_4V(ctx->Pixel.ConvolutionFilterBias[i], 0.0, 0.0, 0.0, 0.0);
1050    }
1051    ASSIGN_4V(ctx->Pixel.PostConvolutionScale, 1.0, 1.0, 1.0, 1.0);
1052    ASSIGN_4V(ctx->Pixel.PostConvolutionBias, 0.0, 0.0, 0.0, 0.0);
1053
1054    /* Point group */
1055    ctx->Point.SmoothFlag = GL_FALSE;
1056    ctx->Point.Size = 1.0;
1057    ctx->Point.Params[0] = 1.0;
1058    ctx->Point.Params[1] = 0.0;
1059    ctx->Point.Params[2] = 0.0;
1060    ctx->Point.Attenuated = GL_FALSE;
1061    ctx->Point.MinSize = 0.0;
1062    ctx->Point.MaxSize = (GLfloat) MAX_POINT_SIZE;
1063    ctx->Point.Threshold = 1.0;
1064
1065    /* Polygon group */
1066    ctx->Polygon.CullFlag = GL_FALSE;
1067    ctx->Polygon.CullFaceMode = GL_BACK;
1068    ctx->Polygon.FrontFace = GL_CCW;
1069    ctx->Polygon.FrontBit = 0;
1070    ctx->Polygon.FrontMode = GL_FILL;
1071    ctx->Polygon.BackMode = GL_FILL;
1072    ctx->Polygon.Unfilled = GL_FALSE;
1073    ctx->Polygon.SmoothFlag = GL_FALSE;
1074    ctx->Polygon.StippleFlag = GL_FALSE;
1075    ctx->Polygon.OffsetFactor = 0.0F;
1076    ctx->Polygon.OffsetUnits = 0.0F;
1077    ctx->Polygon.OffsetPoint = GL_FALSE;
1078    ctx->Polygon.OffsetLine = GL_FALSE;
1079    ctx->Polygon.OffsetFill = GL_FALSE;
1080
1081    /* Polygon Stipple group */
1082    MEMSET( ctx->PolygonStipple, 0xff, 32*sizeof(GLuint) );
1083
1084    /* Scissor group */
1085    ctx->Scissor.Enabled = GL_FALSE;
1086    ctx->Scissor.X = 0;
1087    ctx->Scissor.Y = 0;
1088    ctx->Scissor.Width = 0;
1089    ctx->Scissor.Height = 0;
1090
1091    /* Stencil group */
1092    ctx->Stencil.Enabled = GL_FALSE;
1093    ctx->Stencil.Function = GL_ALWAYS;
1094    ctx->Stencil.FailFunc = GL_KEEP;
1095    ctx->Stencil.ZPassFunc = GL_KEEP;
1096    ctx->Stencil.ZFailFunc = GL_KEEP;
1097    ctx->Stencil.Ref = 0;
1098    ctx->Stencil.ValueMask = STENCIL_MAX;
1099    ctx->Stencil.Clear = 0;
1100    ctx->Stencil.WriteMask = STENCIL_MAX;
1101
1102    /* Texture group */
1103    ctx->Texture.CurrentUnit = 0;      /* multitexture */
1104    ctx->Texture.CurrentTransformUnit = 0; /* multitexture */
1105    ctx->Texture.Enabled = 0;
1106    for (i=0; i<MAX_TEXTURE_UNITS; i++)
1107       init_texture_unit( ctx, i );
1108    _mesa_init_colortable(&ctx->Texture.Palette);
1109
1110    /* Transformation group */
1111    ctx->Transform.MatrixMode = GL_MODELVIEW;
1112    ctx->Transform.Normalize = GL_FALSE;
1113    ctx->Transform.RescaleNormals = GL_FALSE;
1114    for (i=0;i<MAX_CLIP_PLANES;i++) {
1115       ctx->Transform.ClipEnabled[i] = GL_FALSE;
1116       ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 );
1117    }
1118    ctx->Transform.AnyClip = GL_FALSE;
1119
1120    /* Viewport group */
1121    ctx->Viewport.X = 0;
1122    ctx->Viewport.Y = 0;
1123    ctx->Viewport.Width = 0;
1124    ctx->Viewport.Height = 0;
1125    ctx->Viewport.Near = 0.0;
1126    ctx->Viewport.Far = 1.0;
1127    gl_matrix_ctr(&ctx->Viewport.WindowMap);
1128
1129 #define Sz 10
1130 #define Tz 14
1131    ctx->Viewport.WindowMap.m[Sz] = 0.5 * ctx->Visual->DepthMaxF;
1132    ctx->Viewport.WindowMap.m[Tz] = 0.5 * ctx->Visual->DepthMaxF;
1133 #undef Sz
1134 #undef Tz
1135
1136    ctx->Viewport.WindowMap.flags = MAT_FLAG_GENERAL_SCALE|MAT_FLAG_TRANSLATION;
1137    ctx->Viewport.WindowMap.type = MATRIX_3D_NO_ROT;
1138
1139    /* Vertex arrays */
1140    ctx->Array.Vertex.Size = 4;
1141    ctx->Array.Vertex.Type = GL_FLOAT;
1142    ctx->Array.Vertex.Stride = 0;
1143    ctx->Array.Vertex.StrideB = 0;
1144    ctx->Array.Vertex.Ptr = NULL;
1145    ctx->Array.Vertex.Enabled = GL_FALSE;
1146    ctx->Array.Normal.Type = GL_FLOAT;
1147    ctx->Array.Normal.Stride = 0;
1148    ctx->Array.Normal.StrideB = 0;
1149    ctx->Array.Normal.Ptr = NULL;
1150    ctx->Array.Normal.Enabled = GL_FALSE;
1151    ctx->Array.Color.Size = 4;
1152    ctx->Array.Color.Type = GL_FLOAT;
1153    ctx->Array.Color.Stride = 0;
1154    ctx->Array.Color.StrideB = 0;
1155    ctx->Array.Color.Ptr = NULL;
1156    ctx->Array.Color.Enabled = GL_FALSE;
1157    ctx->Array.Index.Type = GL_FLOAT;
1158    ctx->Array.Index.Stride = 0;
1159    ctx->Array.Index.StrideB = 0;
1160    ctx->Array.Index.Ptr = NULL;
1161    ctx->Array.Index.Enabled = GL_FALSE;
1162    for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
1163       ctx->Array.TexCoord[i].Size = 4;
1164       ctx->Array.TexCoord[i].Type = GL_FLOAT;
1165       ctx->Array.TexCoord[i].Stride = 0;
1166       ctx->Array.TexCoord[i].StrideB = 0;
1167       ctx->Array.TexCoord[i].Ptr = NULL;
1168       ctx->Array.TexCoord[i].Enabled = GL_FALSE;
1169    }
1170    ctx->Array.TexCoordInterleaveFactor = 1;
1171    ctx->Array.EdgeFlag.Stride = 0;
1172    ctx->Array.EdgeFlag.StrideB = 0;
1173    ctx->Array.EdgeFlag.Ptr = NULL;
1174    ctx->Array.EdgeFlag.Enabled = GL_FALSE;
1175    ctx->Array.ActiveTexture = 0;   /* GL_ARB_multitexture */
1176
1177    /* Pixel transfer */
1178    ctx->Pack.Alignment = 4;
1179    ctx->Pack.RowLength = 0;
1180    ctx->Pack.ImageHeight = 0;
1181    ctx->Pack.SkipPixels = 0;
1182    ctx->Pack.SkipRows = 0;
1183    ctx->Pack.SkipImages = 0;
1184    ctx->Pack.SwapBytes = GL_FALSE;
1185    ctx->Pack.LsbFirst = GL_FALSE;
1186    ctx->Unpack.Alignment = 4;
1187    ctx->Unpack.RowLength = 0;
1188    ctx->Unpack.ImageHeight = 0;
1189    ctx->Unpack.SkipPixels = 0;
1190    ctx->Unpack.SkipRows = 0;
1191    ctx->Unpack.SkipImages = 0;
1192    ctx->Unpack.SwapBytes = GL_FALSE;
1193    ctx->Unpack.LsbFirst = GL_FALSE;
1194
1195    /* Feedback */
1196    ctx->Feedback.Type = GL_2D;   /* TODO: verify */
1197    ctx->Feedback.Buffer = NULL;
1198    ctx->Feedback.BufferSize = 0;
1199    ctx->Feedback.Count = 0;
1200
1201    /* Selection/picking */
1202    ctx->Select.Buffer = NULL;
1203    ctx->Select.BufferSize = 0;
1204    ctx->Select.BufferCount = 0;
1205    ctx->Select.Hits = 0;
1206    ctx->Select.NameStackDepth = 0;
1207
1208    /* Optimized Accum buffer */
1209    ctx->IntegerAccumMode = GL_TRUE;
1210    ctx->IntegerAccumScaler = 0.0;
1211
1212    /* Renderer and client attribute stacks */
1213    ctx->AttribStackDepth = 0;
1214    ctx->ClientAttribStackDepth = 0;
1215
1216    /* Display list */
1217    ctx->CallDepth = 0;
1218    ctx->ExecuteFlag = GL_TRUE;
1219    ctx->CompileFlag = GL_FALSE;
1220    ctx->CurrentListPtr = NULL;
1221    ctx->CurrentBlock = NULL;
1222    ctx->CurrentListNum = 0;
1223    ctx->CurrentPos = 0;
1224
1225    /* Color tables */
1226    _mesa_init_colortable(&ctx->ColorTable);
1227    _mesa_init_colortable(&ctx->ProxyColorTable);
1228    _mesa_init_colortable(&ctx->PostConvolutionColorTable);
1229    _mesa_init_colortable(&ctx->ProxyPostConvolutionColorTable);
1230    _mesa_init_colortable(&ctx->PostColorMatrixColorTable);
1231    _mesa_init_colortable(&ctx->ProxyPostColorMatrixColorTable);
1232
1233    /* Miscellaneous */
1234    ctx->NewState = NEW_ALL;
1235    ctx->RenderMode = GL_RENDER;
1236    ctx->StippleCounter = 0;
1237    ctx->NeedNormals = GL_FALSE;
1238    ctx->DoViewportMapping = GL_TRUE;
1239
1240    ctx->NeedEyeCoords = GL_FALSE;
1241    ctx->NeedEyeNormals = GL_FALSE;
1242    ctx->vb_proj_matrix = &ctx->ModelProjectMatrix;
1243
1244    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
1245
1246    ctx->CatchSignals = GL_TRUE;
1247    ctx->OcclusionResult = GL_FALSE;
1248    ctx->OcclusionResultSaved = GL_FALSE;
1249
1250    /* For debug/development only */
1251    ctx->NoRaster = getenv("MESA_NO_RASTER") ? GL_TRUE : GL_FALSE;
1252    ctx->FirstTimeCurrent = GL_TRUE;
1253
1254    /* Dither disable */
1255    ctx->NoDither = getenv("MESA_NO_DITHER") ? GL_TRUE : GL_FALSE;
1256    if (ctx->NoDither) {
1257       if (getenv("MESA_DEBUG")) {
1258          fprintf(stderr, "MESA_NO_DITHER set - dithering disabled\n");
1259       }
1260       ctx->Color.DitherFlag = GL_FALSE;
1261    }
1262 }
1263
1264
1265
1266
1267 /*
1268  * Allocate the proxy textures.  If we run out of memory part way through
1269  * the allocations clean up and return GL_FALSE.
1270  * Return:  GL_TRUE=success, GL_FALSE=failure
1271  */
1272 static GLboolean
1273 alloc_proxy_textures( GLcontext *ctx )
1274 {
1275    GLboolean out_of_memory;
1276    GLint i;
1277
1278    ctx->Texture.Proxy1D = gl_alloc_texture_object(NULL, 0, 1);
1279    if (!ctx->Texture.Proxy1D) {
1280       return GL_FALSE;
1281    }
1282
1283    ctx->Texture.Proxy2D = gl_alloc_texture_object(NULL, 0, 2);
1284    if (!ctx->Texture.Proxy2D) {
1285       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1286       return GL_FALSE;
1287    }
1288
1289    ctx->Texture.Proxy3D = gl_alloc_texture_object(NULL, 0, 3);
1290    if (!ctx->Texture.Proxy3D) {
1291       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1292       gl_free_texture_object(NULL, ctx->Texture.Proxy2D);
1293       return GL_FALSE;
1294    }
1295
1296    out_of_memory = GL_FALSE;
1297    for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
1298       ctx->Texture.Proxy1D->Image[i] = _mesa_alloc_texture_image();
1299       ctx->Texture.Proxy2D->Image[i] = _mesa_alloc_texture_image();
1300       ctx->Texture.Proxy3D->Image[i] = _mesa_alloc_texture_image();
1301       if (!ctx->Texture.Proxy1D->Image[i]
1302           || !ctx->Texture.Proxy2D->Image[i]
1303           || !ctx->Texture.Proxy3D->Image[i]) {
1304          out_of_memory = GL_TRUE;
1305       }
1306    }
1307    if (out_of_memory) {
1308       for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
1309          if (ctx->Texture.Proxy1D->Image[i]) {
1310             _mesa_free_texture_image(ctx->Texture.Proxy1D->Image[i]);
1311          }
1312          if (ctx->Texture.Proxy2D->Image[i]) {
1313             _mesa_free_texture_image(ctx->Texture.Proxy2D->Image[i]);
1314          }
1315          if (ctx->Texture.Proxy3D->Image[i]) {
1316             _mesa_free_texture_image(ctx->Texture.Proxy3D->Image[i]);
1317          }
1318       }
1319       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1320       gl_free_texture_object(NULL, ctx->Texture.Proxy2D);
1321       gl_free_texture_object(NULL, ctx->Texture.Proxy3D);
1322       return GL_FALSE;
1323    }
1324    else {
1325       return GL_TRUE;
1326    }
1327 }
1328
1329
1330
1331 /*
1332  * Initialize a GLcontext struct.
1333  */
1334 GLboolean
1335 _mesa_initialize_context( GLcontext *ctx,
1336                           GLvisual *visual,
1337                           GLcontext *share_list,
1338                           void *driver_ctx,
1339                           GLboolean direct )
1340 {
1341    (void) direct;  /* not used */
1342
1343    /* misc one-time initializations */
1344    one_time_init();
1345
1346    ctx->DriverCtx = driver_ctx;
1347    ctx->Visual = visual;
1348    ctx->DrawBuffer = NULL;
1349    ctx->ReadBuffer = NULL;
1350
1351    ctx->VB = gl_vb_create_for_immediate( ctx );
1352    if (!ctx->VB) {
1353       FREE( ctx );
1354       return GL_FALSE;
1355    }
1356    ctx->input = ctx->VB->IM;
1357
1358    ctx->PB = gl_alloc_pb();
1359    if (!ctx->PB) {
1360       FREE( ctx->VB );
1361       FREE( ctx );
1362       return GL_FALSE;
1363    }
1364
1365    if (share_list) {
1366       /* share the group of display lists of another context */
1367       ctx->Shared = share_list->Shared;
1368    }
1369    else {
1370       /* allocate new group of display lists */
1371       ctx->Shared = alloc_shared_state();
1372       if (!ctx->Shared) {
1373          FREE(ctx->VB);
1374          FREE(ctx->PB);
1375          FREE(ctx);
1376          return GL_FALSE;
1377       }
1378    }
1379    _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1380    ctx->Shared->RefCount++;
1381    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1382
1383    init_attrib_groups( ctx );
1384
1385    gl_reset_vb( ctx->VB );
1386    gl_reset_input( ctx );
1387
1388    if (visual->DBflag) {
1389       ctx->Color.DrawBuffer = GL_BACK;
1390       ctx->Color.DriverDrawBuffer = GL_BACK_LEFT;
1391       ctx->Color.DrawDestMask = BACK_LEFT_BIT;
1392       ctx->Pixel.ReadBuffer = GL_BACK;
1393       ctx->Pixel.DriverReadBuffer = GL_BACK_LEFT;
1394    }
1395    else {
1396       ctx->Color.DrawBuffer = GL_FRONT;
1397       ctx->Color.DriverDrawBuffer = GL_FRONT_LEFT;
1398       ctx->Color.DrawDestMask = FRONT_LEFT_BIT;
1399       ctx->Pixel.ReadBuffer = GL_FRONT;
1400       ctx->Pixel.DriverReadBuffer = GL_FRONT_LEFT;
1401    }
1402
1403    if (!alloc_proxy_textures(ctx)) {
1404       free_shared_state(ctx, ctx->Shared);
1405       FREE(ctx->VB);
1406       FREE(ctx->PB);
1407       FREE(ctx);
1408       return GL_FALSE;
1409    }
1410
1411    /* setup API dispatch tables */
1412    ctx->Exec = (struct _glapi_table *) CALLOC(_glapi_get_dispatch_table_size() * sizeof(void *));
1413    ctx->Save = (struct _glapi_table *) CALLOC(_glapi_get_dispatch_table_size() * sizeof(void *));
1414    if (!ctx->Exec || !ctx->Save) {
1415       free_shared_state(ctx, ctx->Shared);
1416       FREE(ctx->VB);
1417       FREE(ctx->PB);
1418       if (ctx->Exec)
1419          FREE(ctx->Exec);
1420       FREE(ctx);
1421    }
1422    _mesa_init_exec_table( ctx->Exec );
1423    _mesa_init_dlist_table( ctx->Save );
1424    ctx->CurrentDispatch = ctx->Exec;
1425
1426    return GL_TRUE;
1427 }
1428
1429
1430
1431 /*
1432  * Allocate and initialize a GLcontext structure.
1433  * Input:  visual - a GLvisual pointer
1434  *         sharelist - another context to share display lists with or NULL
1435  *         driver_ctx - pointer to device driver's context state struct
1436  * Return:  pointer to a new gl_context struct or NULL if error.
1437  */
1438 GLcontext *
1439 gl_create_context( GLvisual *visual,
1440                    GLcontext *share_list,
1441                    void *driver_ctx,
1442                    GLboolean direct )
1443 {
1444    GLcontext *ctx = (GLcontext *) CALLOC( sizeof(GLcontext) );
1445    if (!ctx) {
1446       return NULL;
1447    }
1448
1449    if (_mesa_initialize_context(ctx, visual, share_list, driver_ctx, direct)) {
1450       return ctx;
1451    }
1452    else {
1453       FREE(ctx);
1454       return NULL;
1455    }
1456 }
1457
1458
1459
1460 /*
1461  * Free the data associated with the given context.
1462  * But don't free() the GLcontext struct itself!
1463  */
1464 void
1465 gl_free_context_data( GLcontext *ctx )
1466 {
1467    struct gl_shine_tab *s, *tmps;
1468    GLuint i, j;
1469
1470    /* if we're destroying the current context, unbind it first */
1471    if (ctx == gl_get_current_context()) {
1472       gl_make_current(NULL, NULL);
1473    }
1474
1475    gl_matrix_dtr( &ctx->ModelView );
1476    for (i = 0; i < MAX_MODELVIEW_STACK_DEPTH - 1; i++) {
1477       gl_matrix_dtr( &ctx->ModelViewStack[i] );
1478    }
1479    gl_matrix_dtr( &ctx->ProjectionMatrix );
1480    for (i = 0; i < MAX_PROJECTION_STACK_DEPTH - 1; i++) {
1481       gl_matrix_dtr( &ctx->ProjectionStack[i] );
1482    }
1483    for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
1484       gl_matrix_dtr( &ctx->TextureMatrix[i] );
1485       for (j = 0; j < MAX_TEXTURE_STACK_DEPTH - 1; j++) {
1486          gl_matrix_dtr( &ctx->TextureStack[i][j] );
1487       }
1488    }
1489
1490    FREE( ctx->PB );
1491
1492    if (ctx->input != ctx->VB->IM)
1493       gl_immediate_free( ctx->input );
1494
1495    gl_vb_free( ctx->VB );
1496
1497    _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1498    ctx->Shared->RefCount--;
1499    assert(ctx->Shared->RefCount >= 0);
1500    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1501    if (ctx->Shared->RefCount == 0) {
1502       /* free shared state */
1503       free_shared_state( ctx, ctx->Shared );
1504    }
1505
1506    foreach_s( s, tmps, ctx->ShineTabList ) {
1507       FREE( s );
1508    }
1509    FREE( ctx->ShineTabList );
1510
1511    /* Free proxy texture objects */
1512    gl_free_texture_object( NULL, ctx->Texture.Proxy1D );
1513    gl_free_texture_object( NULL, ctx->Texture.Proxy2D );
1514    gl_free_texture_object( NULL, ctx->Texture.Proxy3D );
1515
1516    /* Free evaluator data */
1517    if (ctx->EvalMap.Map1Vertex3.Points)
1518       FREE( ctx->EvalMap.Map1Vertex3.Points );
1519    if (ctx->EvalMap.Map1Vertex4.Points)
1520       FREE( ctx->EvalMap.Map1Vertex4.Points );
1521    if (ctx->EvalMap.Map1Index.Points)
1522       FREE( ctx->EvalMap.Map1Index.Points );
1523    if (ctx->EvalMap.Map1Color4.Points)
1524       FREE( ctx->EvalMap.Map1Color4.Points );
1525    if (ctx->EvalMap.Map1Normal.Points)
1526       FREE( ctx->EvalMap.Map1Normal.Points );
1527    if (ctx->EvalMap.Map1Texture1.Points)
1528       FREE( ctx->EvalMap.Map1Texture1.Points );
1529    if (ctx->EvalMap.Map1Texture2.Points)
1530       FREE( ctx->EvalMap.Map1Texture2.Points );
1531    if (ctx->EvalMap.Map1Texture3.Points)
1532       FREE( ctx->EvalMap.Map1Texture3.Points );
1533    if (ctx->EvalMap.Map1Texture4.Points)
1534       FREE( ctx->EvalMap.Map1Texture4.Points );
1535
1536    if (ctx->EvalMap.Map2Vertex3.Points)
1537       FREE( ctx->EvalMap.Map2Vertex3.Points );
1538    if (ctx->EvalMap.Map2Vertex4.Points)
1539       FREE( ctx->EvalMap.Map2Vertex4.Points );
1540    if (ctx->EvalMap.Map2Index.Points)
1541       FREE( ctx->EvalMap.Map2Index.Points );
1542    if (ctx->EvalMap.Map2Color4.Points)
1543       FREE( ctx->EvalMap.Map2Color4.Points );
1544    if (ctx->EvalMap.Map2Normal.Points)
1545       FREE( ctx->EvalMap.Map2Normal.Points );
1546    if (ctx->EvalMap.Map2Texture1.Points)
1547       FREE( ctx->EvalMap.Map2Texture1.Points );
1548    if (ctx->EvalMap.Map2Texture2.Points)
1549       FREE( ctx->EvalMap.Map2Texture2.Points );
1550    if (ctx->EvalMap.Map2Texture3.Points)
1551       FREE( ctx->EvalMap.Map2Texture3.Points );
1552    if (ctx->EvalMap.Map2Texture4.Points)
1553       FREE( ctx->EvalMap.Map2Texture4.Points );
1554
1555    _mesa_free_colortable_data( &ctx->ColorTable );
1556    _mesa_free_colortable_data( &ctx->PostConvolutionColorTable );
1557    _mesa_free_colortable_data( &ctx->PostColorMatrixColorTable );
1558    _mesa_free_colortable_data( &ctx->Texture.Palette );
1559
1560    /* Free cache of immediate buffers. */
1561    while (ctx->nr_im_queued-- > 0) {
1562       struct immediate * next = ctx->freed_im_queue->next;
1563       FREE( ctx->freed_im_queue );
1564       ctx->freed_im_queue = next;
1565    }
1566    gl_extensions_dtr(ctx);
1567
1568    FREE(ctx->Exec);
1569    FREE(ctx->Save);
1570 }
1571
1572
1573
1574 /*
1575  * Destroy a GLcontext structure.
1576  */
1577 void
1578 gl_destroy_context( GLcontext *ctx )
1579 {
1580    if (ctx) {
1581       gl_free_context_data(ctx);
1582       FREE( (void *) ctx );
1583    }
1584 }
1585
1586
1587
1588 /*
1589  * Called by the driver after both the context and driver are fully
1590  * initialized.  Currently just reads the config file.
1591  */
1592 void
1593 gl_context_initialize( GLcontext *ctx )
1594 {
1595    gl_read_config_file( ctx );
1596 }
1597
1598
1599
1600 /*
1601  * Copy attribute groups from one context to another.
1602  * Input:  src - source context
1603  *         dst - destination context
1604  *         mask - bitwise OR of GL_*_BIT flags
1605  */
1606 void
1607 gl_copy_context( const GLcontext *src, GLcontext *dst, GLuint mask )
1608 {
1609    if (mask & GL_ACCUM_BUFFER_BIT) {
1610       MEMCPY( &dst->Accum, &src->Accum, sizeof(struct gl_accum_attrib) );
1611    }
1612    if (mask & GL_COLOR_BUFFER_BIT) {
1613       MEMCPY( &dst->Color, &src->Color, sizeof(struct gl_colorbuffer_attrib) );
1614    }
1615    if (mask & GL_CURRENT_BIT) {
1616       MEMCPY( &dst->Current, &src->Current, sizeof(struct gl_current_attrib) );
1617    }
1618    if (mask & GL_DEPTH_BUFFER_BIT) {
1619       MEMCPY( &dst->Depth, &src->Depth, sizeof(struct gl_depthbuffer_attrib) );
1620    }
1621    if (mask & GL_ENABLE_BIT) {
1622       /* no op */
1623    }
1624    if (mask & GL_EVAL_BIT) {
1625       MEMCPY( &dst->Eval, &src->Eval, sizeof(struct gl_eval_attrib) );
1626    }
1627    if (mask & GL_FOG_BIT) {
1628       MEMCPY( &dst->Fog, &src->Fog, sizeof(struct gl_fog_attrib) );
1629    }
1630    if (mask & GL_HINT_BIT) {
1631       MEMCPY( &dst->Hint, &src->Hint, sizeof(struct gl_hint_attrib) );
1632    }
1633    if (mask & GL_LIGHTING_BIT) {
1634       MEMCPY( &dst->Light, &src->Light, sizeof(struct gl_light_attrib) );
1635       /*       gl_reinit_light_attrib( &dst->Light ); */
1636    }
1637    if (mask & GL_LINE_BIT) {
1638       MEMCPY( &dst->Line, &src->Line, sizeof(struct gl_line_attrib) );
1639    }
1640    if (mask & GL_LIST_BIT) {
1641       MEMCPY( &dst->List, &src->List, sizeof(struct gl_list_attrib) );
1642    }
1643    if (mask & GL_PIXEL_MODE_BIT) {
1644       MEMCPY( &dst->Pixel, &src->Pixel, sizeof(struct gl_pixel_attrib) );
1645    }
1646    if (mask & GL_POINT_BIT) {
1647       MEMCPY( &dst->Point, &src->Point, sizeof(struct gl_point_attrib) );
1648    }
1649    if (mask & GL_POLYGON_BIT) {
1650       MEMCPY( &dst->Polygon, &src->Polygon, sizeof(struct gl_polygon_attrib) );
1651    }
1652    if (mask & GL_POLYGON_STIPPLE_BIT) {
1653       /* Use loop instead of MEMCPY due to problem with Portland Group's
1654        * C compiler.  Reported by John Stone.
1655        */
1656       int i;
1657       for (i=0;i<32;i++) {
1658          dst->PolygonStipple[i] = src->PolygonStipple[i];
1659       }
1660    }
1661    if (mask & GL_SCISSOR_BIT) {
1662       MEMCPY( &dst->Scissor, &src->Scissor, sizeof(struct gl_scissor_attrib) );
1663    }
1664    if (mask & GL_STENCIL_BUFFER_BIT) {
1665       MEMCPY( &dst->Stencil, &src->Stencil, sizeof(struct gl_stencil_attrib) );
1666    }
1667    if (mask & GL_TEXTURE_BIT) {
1668       MEMCPY( &dst->Texture, &src->Texture, sizeof(struct gl_texture_attrib) );
1669    }
1670    if (mask & GL_TRANSFORM_BIT) {
1671       MEMCPY( &dst->Transform, &src->Transform, sizeof(struct gl_transform_attrib) );
1672    }
1673    if (mask & GL_VIEWPORT_BIT) {
1674       MEMCPY( &dst->Viewport, &src->Viewport, sizeof(struct gl_viewport_attrib) );
1675    }
1676 }
1677
1678
1679 /*
1680  * Set the current context, binding the given frame buffer to the context.
1681  */
1682 void gl_make_current( GLcontext *newCtx, GLframebuffer *buffer )
1683 {
1684    gl_make_current2( newCtx, buffer, buffer );
1685 }
1686
1687
1688 /*
1689  * Bind the given context to the given draw-buffer and read-buffer
1690  * and make it the current context for this thread.
1691  */
1692 void gl_make_current2( GLcontext *newCtx, GLframebuffer *drawBuffer,
1693                        GLframebuffer *readBuffer )
1694 {
1695 #if 0
1696    GLcontext *oldCtx = gl_get_context();
1697
1698    /* Flush the old context
1699     */
1700    if (oldCtx) {
1701       ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(oldCtx, "gl_make_current");
1702
1703       /* unbind frame buffers from context */
1704       if (oldCtx->DrawBuffer) {
1705          oldCtx->DrawBuffer = NULL;
1706       }
1707       if (oldCtx->ReadBuffer) {
1708          oldCtx->ReadBuffer = NULL;
1709       }
1710    }
1711 #endif
1712
1713    /* We call this function periodically (just here for now) in
1714     * order to detect when multithreading has begun.
1715     */
1716    _glapi_check_multithread();
1717
1718    _glapi_set_context((void *) newCtx);
1719    ASSERT(gl_get_current_context() == newCtx);
1720    if (newCtx) {
1721       SET_IMMEDIATE(newCtx, newCtx->input);
1722       _glapi_set_dispatch(newCtx->CurrentDispatch);
1723    }
1724    else {
1725       _glapi_set_dispatch(NULL);  /* none current */
1726    }
1727
1728    if (MESA_VERBOSE) fprintf(stderr, "gl_make_current()\n");
1729
1730    if (newCtx && drawBuffer && readBuffer) {
1731       /* TODO: check if newCtx and buffer's visual match??? */
1732       newCtx->DrawBuffer = drawBuffer;
1733       newCtx->ReadBuffer = readBuffer;
1734       newCtx->NewState = NEW_ALL;   /* just to be safe */
1735       gl_update_state( newCtx );
1736    }
1737
1738    /* We can use this to help debug user's problems.  Tell the to set
1739     * the MESA_INFO env variable before running their app.  Then the
1740     * first time each context is made current we'll print some useful
1741     * information.
1742     */
1743    if (newCtx && newCtx->FirstTimeCurrent) {
1744       if (getenv("MESA_INFO")) {
1745          fprintf(stderr, "Mesa GL_VERSION = %s\n", (char *) _mesa_GetString(GL_VERSION));
1746          fprintf(stderr, "Mesa GL_RENDERER = %s\n", (char *) _mesa_GetString(GL_RENDERER));
1747          fprintf(stderr, "Mesa GL_VENDOR = %s\n", (char *) _mesa_GetString(GL_VENDOR));
1748          fprintf(stderr, "Mesa GL_EXTENSIONS = %s\n", (char *) _mesa_GetString(GL_EXTENSIONS));
1749 #if defined(THREADS)
1750          fprintf(stderr, "Mesa thread-safe: YES\n");
1751 #else
1752          fprintf(stderr, "Mesa thread-safe: NO\n");
1753 #endif
1754 #if defined(USE_X86_ASM)
1755          fprintf(stderr, "Mesa x86-optimized: YES\n");
1756 #else
1757          fprintf(stderr, "Mesa x86-optimized: NO\n");
1758 #endif
1759       }
1760       newCtx->FirstTimeCurrent = GL_FALSE;
1761    }
1762 }
1763
1764
1765
1766 /*
1767  * Return current context handle for the calling thread.
1768  * This isn't the fastest way to get the current context.
1769  * If you need speed, see the GET_CURRENT_CONTEXT() macro in context.h
1770  */
1771 GLcontext *gl_get_current_context( void )
1772 {
1773    return (GLcontext *) _glapi_get_context();
1774 }
1775
1776
1777
1778 /*
1779  * This should be called by device drivers just before they do a
1780  * swapbuffers.  Any pending rendering commands will be executed.
1781  */
1782 void
1783 _mesa_swapbuffers(GLcontext *ctx)
1784 {
1785    FLUSH_VB( ctx, "swap buffers" );
1786 }
1787
1788
1789
1790 /*
1791  * Return pointer to this context's current API dispatch table.
1792  * It'll either be the immediate-mode execute dispatcher or the
1793  * display list compile dispatcher.
1794  */
1795 struct _glapi_table *
1796 _mesa_get_dispatch(GLcontext *ctx)
1797 {
1798    return ctx->CurrentDispatch;
1799 }
1800
1801
1802
1803 /**********************************************************************/
1804 /*****                Miscellaneous functions                     *****/
1805 /**********************************************************************/
1806
1807
1808 /*
1809  * This function is called when the Mesa user has stumbled into a code
1810  * path which may not be implemented fully or correctly.
1811  */
1812 void gl_problem( const GLcontext *ctx, const char *s )
1813 {
1814    fprintf( stderr, "Mesa implementation error: %s\n", s );
1815    fprintf( stderr, "Report to mesa-bugs@mesa3d.org\n" );
1816    (void) ctx;
1817 }
1818
1819
1820
1821 /*
1822  * This is called to inform the user that he or she has tried to do
1823  * something illogical or if there's likely a bug in their program
1824  * (like enabled depth testing without a depth buffer).
1825  */
1826 void gl_warning( const GLcontext *ctx, const char *s )
1827 {
1828    GLboolean debug;
1829 #ifdef DEBUG
1830    debug = GL_TRUE;
1831 #else
1832    if (getenv("MESA_DEBUG")) {
1833       debug = GL_TRUE;
1834    }
1835    else {
1836       debug = GL_FALSE;
1837    }
1838 #endif
1839    if (debug) {
1840       fprintf( stderr, "Mesa warning: %s\n", s );
1841    }
1842    (void) ctx;
1843 }
1844
1845
1846
1847 /*
1848  * Compile an error into current display list.
1849  */
1850 void gl_compile_error( GLcontext *ctx, GLenum error, const char *s )
1851 {
1852    if (ctx->CompileFlag)
1853       gl_save_error( ctx, error, s );
1854
1855    if (ctx->ExecuteFlag)
1856       gl_error( ctx, error, s );
1857 }
1858
1859
1860
1861 /*
1862  * This is Mesa's error handler.  Normally, all that's done is the updating
1863  * of the current error value.  If Mesa is compiled with -DDEBUG or if the
1864  * environment variable "MESA_DEBUG" is defined then a real error message
1865  * is printed to stderr.
1866  * Input:  error - the error value
1867  *         s - a diagnostic string
1868  */
1869 void gl_error( GLcontext *ctx, GLenum error, const char *s )
1870 {
1871    GLboolean debug;
1872
1873 #ifdef DEBUG
1874    debug = GL_TRUE;
1875 #else
1876    if (getenv("MESA_DEBUG")) {
1877       debug = GL_TRUE;
1878    }
1879    else {
1880       debug = GL_FALSE;
1881    }
1882 #endif
1883
1884    if (debug) {
1885       char errstr[1000];
1886
1887       switch (error) {
1888          case GL_NO_ERROR:
1889             strcpy( errstr, "GL_NO_ERROR" );
1890             break;
1891          case GL_INVALID_VALUE:
1892             strcpy( errstr, "GL_INVALID_VALUE" );
1893             break;
1894          case GL_INVALID_ENUM:
1895             strcpy( errstr, "GL_INVALID_ENUM" );
1896             break;
1897          case GL_INVALID_OPERATION:
1898             strcpy( errstr, "GL_INVALID_OPERATION" );
1899             break;
1900          case GL_STACK_OVERFLOW:
1901             strcpy( errstr, "GL_STACK_OVERFLOW" );
1902             break;
1903          case GL_STACK_UNDERFLOW:
1904             strcpy( errstr, "GL_STACK_UNDERFLOW" );
1905             break;
1906          case GL_OUT_OF_MEMORY:
1907             strcpy( errstr, "GL_OUT_OF_MEMORY" );
1908             break;
1909          default:
1910             strcpy( errstr, "unknown" );
1911             break;
1912       }
1913       fprintf( stderr, "Mesa user error: %s in %s\n", errstr, s );
1914    }
1915
1916    if (ctx->ErrorValue==GL_NO_ERROR) {
1917       ctx->ErrorValue = error;
1918    }
1919
1920    /* Call device driver's error handler, if any.  This is used on the Mac. */
1921    if (ctx->Driver.Error) {
1922       (*ctx->Driver.Error)( ctx );
1923    }
1924 }
1925
1926
1927
1928 void
1929 _mesa_Finish( void )
1930 {
1931    GET_CURRENT_CONTEXT(ctx);
1932    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFinish");
1933    if (ctx->Driver.Finish) {
1934       (*ctx->Driver.Finish)( ctx );
1935    }
1936 }
1937
1938
1939
1940 void
1941 _mesa_Flush( void )
1942 {
1943    GET_CURRENT_CONTEXT(ctx);
1944    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFlush");
1945    if (ctx->Driver.Flush) {
1946       (*ctx->Driver.Flush)( ctx );
1947    }
1948 }