src/mesa/main/context.c

   1 /* $Id: context.c,v 1.53 2000/04/04 15:14:10 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 "context.h"
  36 #include "cva.h"
  37 #include "depth.h"
  38 #include "dlist.h"
  39 #include "eval.h"
  40 #include "enums.h"
  41 #include "extensions.h"
  42 #include "fog.h"
  43 #include "get.h"
  44 #include "glapi.h"
  45 #include "glapinoop.h"
  46 #include "glthread.h"
  47 #include "hash.h"
  48 #include "light.h"
  49 #include "macros.h"
  50 #include "matrix.h"
  51 #include "mem.h"
  52 #include "mmath.h"
  53 #include "pb.h"
  54 #include "pipeline.h"
  55 #include "shade.h"
  56 #include "simple_list.h"
  57 #include "stencil.h"
  58 #include "stages.h"
  59 #include "state.h"
  60 #include "translate.h"
  61 #include "teximage.h"
  62 #include "texobj.h"
  63 #include "texstate.h"
  64 #include "texture.h"
  65 #include "types.h"
  66 #include "varray.h"
  67 #include "vb.h"
  68 #include "vbcull.h"
  69 #include "vbrender.h"
  70 #include "vbxform.h"
  71 #include "vertices.h"
  72 #include "xform.h"
  73 #endif
  74
  75
  76
  77 /**********************************************************************/
  78 /*****                  Context and Thread management             *****/
  79 /**********************************************************************/
  80
  81
  82 #if !defined(THREADS)
  83
  84 struct immediate *_mesa_CurrentInput = NULL;
  85
  86 #endif
  87
  88
  89
  90
  91 /**********************************************************************/
  92 /*****                   Profiling functions                      *****/
  93 /**********************************************************************/
  94
  95 #ifdef PROFILE
  96
  97 #include <sys/times.h>
  98 #include <sys/param.h>
  99
 100
 101 /*
 102  * Return system time in seconds.
 103  * NOTE:  this implementation may not be very portable!
 104  */
 105 GLdouble gl_time( void )
 106 {
 107    static GLdouble prev_time = 0.0;
 108    static GLdouble time;
 109    struct tms tm;
 110    clock_t clk;
 111
 112    clk = times(&tm);
 113
 114 #ifdef CLK_TCK
 115    time = (double)clk / (double)CLK_TCK;
 116 #else
 117    time = (double)clk / (double)HZ;
 118 #endif
 119
 120    if (time>prev_time) {
 121       prev_time = time;
 122       return time;
 123    }
 124    else {
 125       return prev_time;
 126    }
 127 }
 128
 129 /*
 130  * Reset the timing/profiling counters
 131  */
 132 static void init_timings( GLcontext *ctx )
 133 {
 134    ctx->BeginEndCount = 0;
 135    ctx->BeginEndTime = 0.0;
 136    ctx->VertexCount = 0;
 137    ctx->VertexTime = 0.0;
 138    ctx->PointCount = 0;
 139    ctx->PointTime = 0.0;
 140    ctx->LineCount = 0;
 141    ctx->LineTime = 0.0;
 142    ctx->PolygonCount = 0;
 143    ctx->PolygonTime = 0.0;
 144    ctx->ClearCount = 0;
 145    ctx->ClearTime = 0.0;
 146    ctx->SwapCount = 0;
 147    ctx->SwapTime = 0.0;
 148 }
 149
 150
 151 /*
 152  * Print the accumulated timing/profiling data.
 153  */
 154 static void print_timings( GLcontext *ctx )
 155 {
 156    GLdouble beginendrate;
 157    GLdouble vertexrate;
 158    GLdouble pointrate;
 159    GLdouble linerate;
 160    GLdouble polygonrate;
 161    GLdouble overhead;
 162    GLdouble clearrate;
 163    GLdouble swaprate;
 164    GLdouble avgvertices;
 165
 166    if (ctx->BeginEndTime>0.0) {
 167       beginendrate = ctx->BeginEndCount / ctx->BeginEndTime;
 168    }
 169    else {
 170       beginendrate = 0.0;
 171    }
 172    if (ctx->VertexTime>0.0) {
 173       vertexrate = ctx->VertexCount / ctx->VertexTime;
 174    }
 175    else {
 176       vertexrate = 0.0;
 177    }
 178    if (ctx->PointTime>0.0) {
 179       pointrate = ctx->PointCount / ctx->PointTime;
 180    }
 181    else {
 182       pointrate = 0.0;
 183    }
 184    if (ctx->LineTime>0.0) {
 185       linerate = ctx->LineCount / ctx->LineTime;
 186    }
 187    else {
 188       linerate = 0.0;
 189    }
 190    if (ctx->PolygonTime>0.0) {
 191       polygonrate = ctx->PolygonCount / ctx->PolygonTime;
 192    }
 193    else {
 194       polygonrate = 0.0;
 195    }
 196    if (ctx->ClearTime>0.0) {
 197       clearrate = ctx->ClearCount / ctx->ClearTime;
 198    }
 199    else {
 200       clearrate = 0.0;
 201    }
 202    if (ctx->SwapTime>0.0) {
 203       swaprate = ctx->SwapCount / ctx->SwapTime;
 204    }
 205    else {
 206       swaprate = 0.0;
 207    }
 208
 209    if (ctx->BeginEndCount>0) {
 210       avgvertices = (GLdouble) ctx->VertexCount / (GLdouble) ctx->BeginEndCount;
 211    }
 212    else {
 213       avgvertices = 0.0;
 214    }
 215
 216    overhead = ctx->BeginEndTime - ctx->VertexTime - ctx->PointTime
 217               - ctx->LineTime - ctx->PolygonTime;
 218
 219
 220    printf("                          Count   Time (s)    Rate (/s) \n");
 221    printf("--------------------------------------------------------\n");
 222    printf("glBegin/glEnd           %7d  %8.3f   %10.3f\n",
 223           ctx->BeginEndCount, ctx->BeginEndTime, beginendrate);
 224    printf("  vertexes transformed  %7d  %8.3f   %10.3f\n",
 225           ctx->VertexCount, ctx->VertexTime, vertexrate );
 226    printf("  points rasterized     %7d  %8.3f   %10.3f\n",
 227           ctx->PointCount, ctx->PointTime, pointrate );
 228    printf("  lines rasterized      %7d  %8.3f   %10.3f\n",
 229           ctx->LineCount, ctx->LineTime, linerate );
 230    printf("  polygons rasterized   %7d  %8.3f   %10.3f\n",
 231           ctx->PolygonCount, ctx->PolygonTime, polygonrate );
 232    printf("  overhead                       %8.3f\n", overhead );
 233    printf("glClear                 %7d  %8.3f   %10.3f\n",
 234           ctx->ClearCount, ctx->ClearTime, clearrate );
 235    printf("SwapBuffers             %7d  %8.3f   %10.3f\n",
 236           ctx->SwapCount, ctx->SwapTime, swaprate );
 237    printf("\n");
 238
 239    printf("Average number of vertices per begin/end: %8.3f\n", avgvertices );
 240 }
 241 #endif
 242
 243
 244
 245
 246
 247 /**********************************************************************/
 248 /***** GL Visual allocation/destruction                           *****/
 249 /**********************************************************************/
 250
 251
 252 /*
 253  * Allocate a new GLvisual object.
 254  * Input:  rgbFlag - GL_TRUE=RGB(A) mode, GL_FALSE=Color Index mode
 255  *         alphaFlag - alloc software alpha buffers?
 256  *         dbFlag - double buffering?
 257  *         stereoFlag - stereo buffer?
 258  *         depthBits - requested bits per depth buffer value
 259  *                     Any value in [0, 32] is acceptable but the actual
 260  *                     depth type will be GLushort or GLuint as needed.
 261  *         stencilBits - requested minimum bits per stencil buffer value
 262  *         accumBits - requested minimum bits per accum buffer component
 263  *         indexBits - number of bits per pixel if rgbFlag==GL_FALSE
 264  *         red/green/blue/alphaBits - number of bits per color component
 265  *                                    in frame buffer for RGB(A) mode.
 266  *                                    We always use 8 in core Mesa though.
 267  * Return:  pointer to new GLvisual or NULL if requested parameters can't
 268  *          be met.
 269  */
 270 GLvisual *
 271 _mesa_create_visual( GLboolean rgbFlag,
 272                      GLboolean alphaFlag,
 273                      GLboolean dbFlag,
 274                      GLboolean stereoFlag,
 275                      GLint redBits,
 276                      GLint greenBits,
 277                      GLint blueBits,
 278                      GLint alphaBits,
 279                      GLint indexBits,
 280                      GLint depthBits,
 281                      GLint stencilBits,
 282                      GLint accumRedBits,
 283                      GLint accumGreenBits,
 284                      GLint accumBlueBits,
 285                      GLint accumAlphaBits,
 286                      GLint numSamples )
 287 {
 288    GLvisual *vis;
 289
 290    /* This is to catch bad values from device drivers not updated for
 291     * Mesa 3.3.  Some device drivers just passed 1.  That's a REALLY
 292     * bad value now (a 1-bit depth buffer!?!).
 293     */
 294    assert(depthBits == 0 || depthBits > 1);
 295
 296    if (depthBits < 0 || depthBits > 32) {
 297       return NULL;
 298    }
 299    if (stencilBits < 0 || stencilBits > (GLint) (8 * sizeof(GLstencil))) {
 300       return NULL;
 301    }
 302    if (accumRedBits < 0 || accumRedBits > (GLint) (8 * sizeof(GLaccum))) {
 303       return NULL;
 304    }
 305    if (accumGreenBits < 0 || accumGreenBits > (GLint) (8 * sizeof(GLaccum))) {
 306       return NULL;
 307    }
 308    if (accumBlueBits < 0 || accumBlueBits > (GLint) (8 * sizeof(GLaccum))) {
 309       return NULL;
 310    }
 311    if (accumAlphaBits < 0 || accumAlphaBits > (GLint) (8 * sizeof(GLaccum))) {
 312       return NULL;
 313    }
 314
 315    vis = (GLvisual *) CALLOC( sizeof(GLvisual) );
 316    if (!vis) {
 317       return NULL;
 318    }
 319
 320    vis->RGBAflag   = rgbFlag;
 321    vis->DBflag     = dbFlag;
 322    vis->StereoFlag = stereoFlag;
 323    vis->RedBits    = redBits;
 324    vis->GreenBits  = greenBits;
 325    vis->BlueBits   = blueBits;
 326    vis->AlphaBits  = alphaFlag ? (8 * sizeof(GLubyte)) : alphaBits;
 327
 328    vis->IndexBits      = indexBits;
 329    vis->DepthBits      = depthBits;
 330    vis->AccumRedBits   = (accumRedBits > 0) ? (8 * sizeof(GLaccum)) : 0;
 331    vis->AccumGreenBits = (accumGreenBits > 0) ? (8 * sizeof(GLaccum)) : 0;
 332    vis->AccumBlueBits  = (accumBlueBits > 0) ? (8 * sizeof(GLaccum)) : 0;
 333    vis->AccumAlphaBits = (accumAlphaBits > 0) ? (8 * sizeof(GLaccum)) : 0;
 334    vis->StencilBits    = (stencilBits > 0) ? (8 * sizeof(GLstencil)) : 0;
 335
 336    vis->SoftwareAlpha = alphaFlag;
 337
 338    if (depthBits == 0) {
 339       /* Special case.  Even if we don't have a depth buffer we need
 340        * good values for DepthMax for Z vertex transformation purposes.
 341        */
 342       vis->DepthMax = 1;
 343       vis->DepthMaxF = 1.0F;
 344    }
 345    else {
 346       vis->DepthMax = (1 << depthBits) - 1;
 347       vis->DepthMaxF = (GLfloat) vis->DepthMax;
 348    }
 349
 350    return vis;
 351 }
 352
 353
 354 /* This function should no longer be used. Use _mesa_create_visual() instead */
 355 GLvisual *gl_create_visual( GLboolean rgbFlag,
 356                             GLboolean alphaFlag,
 357                             GLboolean dbFlag,
 358                             GLboolean stereoFlag,
 359                             GLint depthBits,
 360                             GLint stencilBits,
 361                             GLint accumBits,
 362                             GLint indexBits,
 363                             GLint redBits,
 364                             GLint greenBits,
 365                             GLint blueBits,
 366                             GLint alphaBits )
 367 {
 368    return _mesa_create_visual(rgbFlag, alphaFlag, dbFlag, stereoFlag,
 369                               redBits, greenBits, blueBits, alphaBits,
 370                               indexBits, depthBits, stencilBits,
 371                               accumBits, accumBits, accumBits, accumBits, 0);
 372 }
 373
 374
 375 void
 376 _mesa_destroy_visual( GLvisual *vis )
 377 {
 378    FREE(vis);
 379 }
 380
 381
 382 /* obsolete */
 383 void gl_destroy_visual( GLvisual *vis )
 384 {
 385    _mesa_destroy_visual(vis);
 386 }
 387
 388
 389
 390 /**********************************************************************/
 391 /***** GL Framebuffer allocation/destruction                      *****/
 392 /**********************************************************************/
 393
 394
 395 /*
 396  * Create a new framebuffer.  A GLframebuffer is a struct which
 397  * encapsulates the depth, stencil and accum buffers and related
 398  * parameters.
 399  * Input:  visual - a GLvisual pointer
 400  *         softwareDepth - create/use a software depth buffer?
 401  *         softwareStencil - create/use a software stencil buffer?
 402  *         softwareAccum - create/use a software accum buffer?
 403  *         softwareAlpha - create/use a software alpha buffer?
 404
 405  * Return:  pointer to new GLframebuffer struct or NULL if error.
 406  */
 407 GLframebuffer *gl_create_framebuffer( GLvisual *visual,
 408                                       GLboolean softwareDepth,
 409                                       GLboolean softwareStencil,
 410                                       GLboolean softwareAccum,
 411                                       GLboolean softwareAlpha )
 412 {
 413    GLframebuffer *buffer;
 414
 415    buffer = CALLOC_STRUCT(gl_frame_buffer);
 416    if (!buffer) {
 417       return NULL;
 418    }
 419
 420    /* sanity checks */
 421    if (softwareDepth ) {
 422       assert(visual->DepthBits > 0);
 423    }
 424    if (softwareStencil) {
 425       assert(visual->StencilBits > 0);
 426    }
 427    if (softwareAccum) {
 428       assert(visual->RGBAflag);
 429       assert(visual->AccumRedBits > 0);
 430       assert(visual->AccumGreenBits > 0);
 431       assert(visual->AccumBlueBits > 0);
 432    }
 433    if (softwareAlpha) {
 434       assert(visual->RGBAflag);
 435       assert(visual->AlphaBits > 0);
 436    }
 437
 438    buffer->Visual = visual;
 439    buffer->UseSoftwareDepthBuffer = softwareDepth;
 440    buffer->UseSoftwareStencilBuffer = softwareStencil;
 441    buffer->UseSoftwareAccumBuffer = softwareAccum;
 442    buffer->UseSoftwareAlphaBuffers = softwareAlpha;
 443
 444    return buffer;
 445 }
 446
 447
 448
 449 /*
 450  * Free a framebuffer struct and its buffers.
 451  */
 452 void gl_destroy_framebuffer( GLframebuffer *buffer )
 453 {
 454    if (buffer) {
 455       if (buffer->DepthBuffer) {
 456          FREE( buffer->DepthBuffer );
 457       }
 458       if (buffer->Accum) {
 459          FREE( buffer->Accum );
 460       }
 461       if (buffer->Stencil) {
 462          FREE( buffer->Stencil );
 463       }
 464       if (buffer->FrontLeftAlpha) {
 465          FREE( buffer->FrontLeftAlpha );
 466       }
 467       if (buffer->BackLeftAlpha) {
 468          FREE( buffer->BackLeftAlpha );
 469       }
 470       if (buffer->FrontRightAlpha) {
 471          FREE( buffer->FrontRightAlpha );
 472       }
 473       if (buffer->BackRightAlpha) {
 474          FREE( buffer->BackRightAlpha );
 475       }
 476       FREE(buffer);
 477    }
 478 }
 479
 480
 481
 482 /**********************************************************************/
 483 /*****       Context allocation, initialization, destroying       *****/
 484 /**********************************************************************/
 485
 486
 487 _glthread_DECLARE_STATIC_MUTEX(OneTimeLock);
 488
 489
 490 /*
 491  * This function just calls all the various one-time-init functions in Mesa.
 492  */
 493 static void one_time_init( void )
 494 {
 495    static GLboolean alreadyCalled = GL_FALSE;
 496    _glthread_LOCK_MUTEX(OneTimeLock);
 497    if (!alreadyCalled) {
 498       /* do some implementation tests */
 499       assert( sizeof(GLbyte) == 1 );
 500       assert( sizeof(GLshort) >= 2 );
 501       assert( sizeof(GLint) >= 4 );
 502       assert( sizeof(GLubyte) == 1 );
 503       assert( sizeof(GLushort) >= 2 );
 504       assert( sizeof(GLuint) >= 4 );
 505
 506       gl_init_clip();
 507       gl_init_eval();
 508       _mesa_init_fog();
 509       _mesa_init_math();
 510       gl_init_lists();
 511       gl_init_shade();
 512       gl_init_texture();
 513       gl_init_transformation();
 514       gl_init_translate();
 515       gl_init_vbrender();
 516       gl_init_vbxform();
 517       gl_init_vertices();
 518
 519       if (getenv("MESA_DEBUG")) {
 520          _glapi_noop_enable_warnings(GL_TRUE);
 521       }
 522       else {
 523          _glapi_noop_enable_warnings(GL_FALSE);
 524       }
 525
 526 #if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
 527    fprintf(stderr, "Mesa DEBUG build %s %s\n", __DATE__, __TIME__);
 528 #endif
 529
 530       alreadyCalled = GL_TRUE;
 531    }
 532    _glthread_UNLOCK_MUTEX(OneTimeLock);
 533 }
 534
 535
 536
 537 /*
 538  * Allocate and initialize a shared context state structure.
 539  */
 540 static struct gl_shared_state *alloc_shared_state( void )
 541 {
 542    GLuint d;
 543    struct gl_shared_state *ss;
 544    GLboolean outOfMemory;
 545
 546    ss = CALLOC_STRUCT(gl_shared_state);
 547    if (!ss)
 548       return NULL;
 549
 550    ss->DisplayList = _mesa_NewHashTable();
 551
 552    ss->TexObjects = _mesa_NewHashTable();
 553
 554    /* Default Texture objects */
 555    outOfMemory = GL_FALSE;
 556    for (d = 1 ; d <= 3 ; d++) {
 557       ss->DefaultD[d] = gl_alloc_texture_object(ss, 0, d);
 558       if (!ss->DefaultD[d]) {
 559          outOfMemory = GL_TRUE;
 560          break;
 561       }
 562       ss->DefaultD[d]->RefCount++; /* don't free if not in use */
 563    }
 564
 565    if (!ss->DisplayList || !ss->TexObjects || outOfMemory) {
 566       /* Ran out of memory at some point.  Free everything and return NULL */
 567       if (ss->DisplayList)
 568          _mesa_DeleteHashTable(ss->DisplayList);
 569       if (ss->TexObjects)
 570          _mesa_DeleteHashTable(ss->TexObjects);
 571       if (ss->DefaultD[1])
 572          gl_free_texture_object(ss, ss->DefaultD[1]);
 573       if (ss->DefaultD[2])
 574          gl_free_texture_object(ss, ss->DefaultD[2]);
 575       if (ss->DefaultD[3])
 576          gl_free_texture_object(ss, ss->DefaultD[3]);
 577       FREE(ss);
 578       return NULL;
 579    }
 580    else {
 581       return ss;
 582    }
 583 }
 584
 585
 586 /*
 587  * Deallocate a shared state context and all children structures.
 588  */
 589 static void free_shared_state( GLcontext *ctx, struct gl_shared_state *ss )
 590 {
 591    /* Free display lists */
 592    while (1) {
 593       GLuint list = _mesa_HashFirstEntry(ss->DisplayList);
 594       if (list) {
 595          gl_destroy_list(ctx, list);
 596       }
 597       else {
 598          break;
 599       }
 600    }
 601    _mesa_DeleteHashTable(ss->DisplayList);
 602
 603    /* Free texture objects */
 604    while (ss->TexObjectList)
 605    {
 606       if (ctx->Driver.DeleteTexture)
 607          (*ctx->Driver.DeleteTexture)( ctx, ss->TexObjectList );
 608       /* this function removes from linked list too! */
 609       gl_free_texture_object(ss, ss->TexObjectList);
 610    }
 611    _mesa_DeleteHashTable(ss->TexObjects);
 612
 613    FREE(ss);
 614 }
 615
 616
 617
 618 /*
 619  * Initialize the nth light.  Note that the defaults for light 0 are
 620  * different than the other lights.
 621  */
 622 static void init_light( struct gl_light *l, GLuint n )
 623 {
 624    make_empty_list( l );
 625
 626    ASSIGN_4V( l->Ambient, 0.0, 0.0, 0.0, 1.0 );
 627    if (n==0) {
 628       ASSIGN_4V( l->Diffuse, 1.0, 1.0, 1.0, 1.0 );
 629       ASSIGN_4V( l->Specular, 1.0, 1.0, 1.0, 1.0 );
 630    }
 631    else {
 632       ASSIGN_4V( l->Diffuse, 0.0, 0.0, 0.0, 1.0 );
 633       ASSIGN_4V( l->Specular, 0.0, 0.0, 0.0, 1.0 );
 634    }
 635    ASSIGN_4V( l->EyePosition, 0.0, 0.0, 1.0, 0.0 );
 636    ASSIGN_3V( l->EyeDirection, 0.0, 0.0, -1.0 );
 637    l->SpotExponent = 0.0;
 638    gl_compute_spot_exp_table( l );
 639    l->SpotCutoff = 180.0;
 640    l->CosCutoff = 0.0;          /* KW: -ve values not admitted */
 641    l->ConstantAttenuation = 1.0;
 642    l->LinearAttenuation = 0.0;
 643    l->QuadraticAttenuation = 0.0;
 644    l->Enabled = GL_FALSE;
 645 }
 646
 647
 648
 649 static void init_lightmodel( struct gl_lightmodel *lm )
 650 {
 651    ASSIGN_4V( lm->Ambient, 0.2, 0.2, 0.2, 1.0 );
 652    lm->LocalViewer = GL_FALSE;
 653    lm->TwoSide = GL_FALSE;
 654    lm->ColorControl = GL_SINGLE_COLOR;
 655 }
 656
 657
 658 static void init_material( struct gl_material *m )
 659 {
 660    ASSIGN_4V( m->Ambient,  0.2, 0.2, 0.2, 1.0 );
 661    ASSIGN_4V( m->Diffuse,  0.8, 0.8, 0.8, 1.0 );
 662    ASSIGN_4V( m->Specular, 0.0, 0.0, 0.0, 1.0 );
 663    ASSIGN_4V( m->Emission, 0.0, 0.0, 0.0, 1.0 );
 664    m->Shininess = 0.0;
 665    m->AmbientIndex = 0;
 666    m->DiffuseIndex = 1;
 667    m->SpecularIndex = 1;
 668 }
 669
 670
 671
 672 static void init_texture_unit( GLcontext *ctx, GLuint unit )
 673 {
 674    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
 675
 676    texUnit->EnvMode = GL_MODULATE;
 677    ASSIGN_4V( texUnit->EnvColor, 0.0, 0.0, 0.0, 0.0 );
 678    texUnit->TexGenEnabled = 0;
 679    texUnit->GenModeS = GL_EYE_LINEAR;
 680    texUnit->GenModeT = GL_EYE_LINEAR;
 681    texUnit->GenModeR = GL_EYE_LINEAR;
 682    texUnit->GenModeQ = GL_EYE_LINEAR;
 683    /* Yes, these plane coefficients are correct! */
 684    ASSIGN_4V( texUnit->ObjectPlaneS, 1.0, 0.0, 0.0, 0.0 );
 685    ASSIGN_4V( texUnit->ObjectPlaneT, 0.0, 1.0, 0.0, 0.0 );
 686    ASSIGN_4V( texUnit->ObjectPlaneR, 0.0, 0.0, 0.0, 0.0 );
 687    ASSIGN_4V( texUnit->ObjectPlaneQ, 0.0, 0.0, 0.0, 0.0 );
 688    ASSIGN_4V( texUnit->EyePlaneS, 1.0, 0.0, 0.0, 0.0 );
 689    ASSIGN_4V( texUnit->EyePlaneT, 0.0, 1.0, 0.0, 0.0 );
 690    ASSIGN_4V( texUnit->EyePlaneR, 0.0, 0.0, 0.0, 0.0 );
 691    ASSIGN_4V( texUnit->EyePlaneQ, 0.0, 0.0, 0.0, 0.0 );
 692
 693    texUnit->CurrentD[1] = ctx->Shared->DefaultD[1];
 694    texUnit->CurrentD[2] = ctx->Shared->DefaultD[2];
 695    texUnit->CurrentD[3] = ctx->Shared->DefaultD[3];
 696 }
 697
 698
 699 static void init_fallback_arrays( GLcontext *ctx )
 700 {
 701    struct gl_client_array *cl;
 702    GLuint i;
 703
 704    cl = &ctx->Fallback.Normal;
 705    cl->Size = 3;
 706    cl->Type = GL_FLOAT;
 707    cl->Stride = 0;
 708    cl->StrideB = 0;
 709    cl->Ptr = (void *) ctx->Current.Normal;
 710    cl->Enabled = 1;
 711
 712    cl = &ctx->Fallback.Color;
 713    cl->Size = 4;
 714    cl->Type = GL_UNSIGNED_BYTE;
 715    cl->Stride = 0;
 716    cl->StrideB = 0;
 717    cl->Ptr = (void *) ctx->Current.ByteColor;
 718    cl->Enabled = 1;
 719
 720    cl = &ctx->Fallback.Index;
 721    cl->Size = 1;
 722    cl->Type = GL_UNSIGNED_INT;
 723    cl->Stride = 0;
 724    cl->StrideB = 0;
 725    cl->Ptr = (void *) &ctx->Current.Index;
 726    cl->Enabled = 1;
 727
 728    for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++) {
 729       cl = &ctx->Fallback.TexCoord[i];
 730       cl->Size = 4;
 731       cl->Type = GL_FLOAT;
 732       cl->Stride = 0;
 733       cl->StrideB = 0;
 734       cl->Ptr = (void *) ctx->Current.Texcoord[i];
 735       cl->Enabled = 1;
 736    }
 737
 738    cl = &ctx->Fallback.EdgeFlag;
 739    cl->Size = 1;
 740    cl->Type = GL_UNSIGNED_BYTE;
 741    cl->Stride = 0;
 742    cl->StrideB = 0;
 743    cl->Ptr = (void *) &ctx->Current.EdgeFlag;
 744    cl->Enabled = 1;
 745 }
 746
 747
 748 /* Initialize a 1-D evaluator map */
 749 static void init_1d_map( struct gl_1d_map *map, int n, const float *initial )
 750 {
 751    map->Order = 1;
 752    map->u1 = 0.0;
 753    map->u2 = 1.0;
 754    map->Points = (GLfloat *) MALLOC(n * sizeof(GLfloat));
 755    if (map->Points) {
 756       GLint i;
 757       for (i=0;i<n;i++)
 758          map->Points[i] = initial[i];
 759    }
 760 }
 761
 762
 763 /* Initialize a 2-D evaluator map */
 764 static void init_2d_map( struct gl_2d_map *map, int n, const float *initial )
 765 {
 766    map->Uorder = 1;
 767    map->Vorder = 1;
 768    map->u1 = 0.0;
 769    map->u2 = 1.0;
 770    map->v1 = 0.0;
 771    map->v2 = 1.0;
 772    map->Points = (GLfloat *) MALLOC(n * sizeof(GLfloat));
 773    if (map->Points) {
 774       GLint i;
 775       for (i=0;i<n;i++)
 776          map->Points[i] = initial[i];
 777    }
 778 }
 779
 780
 781 static void init_color_table( struct gl_color_table *p )
 782 {
 783    p->Table[0] = 255;
 784    p->Table[1] = 255;
 785    p->Table[2] = 255;
 786    p->Table[3] = 255;
 787    p->Size = 1;
 788    p->IntFormat = GL_RGBA;
 789    p->Format = GL_RGBA;
 790 }
 791
 792
 793 /*
 794  * Initialize the attribute groups in a GLcontext.
 795  */
 796 static void init_attrib_groups( GLcontext *ctx )
 797 {
 798    GLuint i, j;
 799
 800    assert(ctx);
 801
 802    /* Constants, may be overriden by device drivers */
 803    ctx->Const.MaxTextureLevels = MAX_TEXTURE_LEVELS;
 804    ctx->Const.MaxTextureSize = 1 << (MAX_TEXTURE_LEVELS - 1);
 805    ctx->Const.MaxTextureUnits = MAX_TEXTURE_UNITS;
 806    ctx->Const.MaxArrayLockSize = MAX_ARRAY_LOCK_SIZE;
 807    ctx->Const.SubPixelBits = SUB_PIXEL_BITS;
 808    ctx->Const.MinPointSize = MIN_POINT_SIZE;
 809    ctx->Const.MaxPointSize = MAX_POINT_SIZE;
 810    ctx->Const.MinPointSizeAA = MIN_POINT_SIZE;
 811    ctx->Const.MaxPointSizeAA = MAX_POINT_SIZE;
 812    ctx->Const.PointSizeGranularity = POINT_SIZE_GRANULARITY;
 813    ctx->Const.MinLineWidth = MIN_LINE_WIDTH;
 814    ctx->Const.MaxLineWidth = MAX_LINE_WIDTH;
 815    ctx->Const.MinLineWidthAA = MIN_LINE_WIDTH;
 816    ctx->Const.MaxLineWidthAA = MAX_LINE_WIDTH;
 817    ctx->Const.LineWidthGranularity = LINE_WIDTH_GRANULARITY;
 818    ctx->Const.NumAuxBuffers = NUM_AUX_BUFFERS;
 819
 820    /* Modelview matrix */
 821    gl_matrix_ctr( &ctx->ModelView );
 822    gl_matrix_alloc_inv( &ctx->ModelView );
 823
 824    ctx->ModelViewStackDepth = 0;
 825    for (i = 0; i < MAX_MODELVIEW_STACK_DEPTH - 1; i++) {
 826       gl_matrix_ctr( &ctx->ModelViewStack[i] );
 827       gl_matrix_alloc_inv( &ctx->ModelViewStack[i] );
 828    }
 829
 830    /* Projection matrix - need inv for user clipping in clip space*/
 831    gl_matrix_ctr( &ctx->ProjectionMatrix );
 832    gl_matrix_alloc_inv( &ctx->ProjectionMatrix );
 833
 834    gl_matrix_ctr( &ctx->ModelProjectMatrix );
 835    gl_matrix_ctr( &ctx->ModelProjectWinMatrix );
 836    ctx->ModelProjectWinMatrixUptodate = GL_FALSE;
 837
 838    ctx->ProjectionStackDepth = 0;
 839    ctx->NearFarStack[0][0] = 1.0; /* These values seem weird by make */
 840    ctx->NearFarStack[0][1] = 0.0; /* sense mathematically. */
 841
 842    for (i = 0; i < MAX_PROJECTION_STACK_DEPTH - 1; i++) {
 843       gl_matrix_ctr( &ctx->ProjectionStack[i] );
 844       gl_matrix_alloc_inv( &ctx->ProjectionStack[i] );
 845    }
 846
 847    /* Texture matrix */
 848    for (i=0; i<MAX_TEXTURE_UNITS; i++) {
 849       gl_matrix_ctr( &ctx->TextureMatrix[i] );
 850       ctx->TextureStackDepth[i] = 0;
 851       for (j = 0; j < MAX_TEXTURE_STACK_DEPTH - 1; j++) {
 852          ctx->TextureStack[i][j].inv = 0;
 853       }
 854    }
 855
 856    /* Accumulate buffer group */
 857    ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 858
 859    /* Color buffer group */
 860    ctx->Color.IndexMask = 0xffffffff;
 861    ctx->Color.ColorMask[0] = 0xff;
 862    ctx->Color.ColorMask[1] = 0xff;
 863    ctx->Color.ColorMask[2] = 0xff;
 864    ctx->Color.ColorMask[3] = 0xff;
 865    ctx->Color.SWmasking = GL_FALSE;
 866    ctx->Color.ClearIndex = 0;
 867    ASSIGN_4V( ctx->Color.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 868    ctx->Color.DrawBuffer = GL_FRONT;
 869    ctx->Color.AlphaEnabled = GL_FALSE;
 870    ctx->Color.AlphaFunc = GL_ALWAYS;
 871    ctx->Color.AlphaRef = 0;
 872    ctx->Color.BlendEnabled = GL_FALSE;
 873    ctx->Color.BlendSrcRGB = GL_ONE;
 874    ctx->Color.BlendDstRGB = GL_ZERO;
 875    ctx->Color.BlendSrcA = GL_ONE;
 876    ctx->Color.BlendDstA = GL_ZERO;
 877    ctx->Color.BlendEquation = GL_FUNC_ADD_EXT;
 878    ctx->Color.BlendFunc = NULL;  /* this pointer set only when needed */
 879    ASSIGN_4V( ctx->Color.BlendColor, 0.0, 0.0, 0.0, 0.0 );
 880    ctx->Color.IndexLogicOpEnabled = GL_FALSE;
 881    ctx->Color.ColorLogicOpEnabled = GL_FALSE;
 882    ctx->Color.SWLogicOpEnabled = GL_FALSE;
 883    ctx->Color.LogicOp = GL_COPY;
 884    ctx->Color.DitherFlag = GL_TRUE;
 885    ctx->Color.MultiDrawBuffer = GL_FALSE;
 886
 887    /* Current group */
 888    ASSIGN_4V( ctx->Current.ByteColor, 255, 255, 255, 255);
 889    ctx->Current.Index = 1;
 890    for (i=0; i<MAX_TEXTURE_UNITS; i++)
 891       ASSIGN_4V( ctx->Current.Texcoord[i], 0.0, 0.0, 0.0, 1.0 );
 892    ASSIGN_4V( ctx->Current.RasterPos, 0.0, 0.0, 0.0, 1.0 );
 893    ctx->Current.RasterDistance = 0.0;
 894    ASSIGN_4V( ctx->Current.RasterColor, 1.0, 1.0, 1.0, 1.0 );
 895    ctx->Current.RasterIndex = 1;
 896    for (i=0; i<MAX_TEXTURE_UNITS; i++)
 897       ASSIGN_4V( ctx->Current.RasterMultiTexCoord[i], 0.0, 0.0, 0.0, 1.0 );
 898    ctx->Current.RasterTexCoord = ctx->Current.RasterMultiTexCoord[0];
 899    ctx->Current.RasterPosValid = GL_TRUE;
 900    ctx->Current.EdgeFlag = GL_TRUE;
 901    ASSIGN_3V( ctx->Current.Normal, 0.0, 0.0, 1.0 );
 902    ctx->Current.Primitive = (GLenum) (GL_POLYGON + 1);
 903
 904    ctx->Current.Flag = (VERT_NORM|VERT_INDEX|VERT_RGBA|VERT_EDGE|
 905                         VERT_TEX0_1|VERT_TEX1_1|VERT_MATERIAL);
 906
 907    init_fallback_arrays( ctx );
 908
 909    /* Depth buffer group */
 910    ctx->Depth.Test = GL_FALSE;
 911    ctx->Depth.Clear = 1.0;
 912    ctx->Depth.Func = GL_LESS;
 913    ctx->Depth.Mask = GL_TRUE;
 914    ctx->Depth.OcclusionTest = GL_FALSE;
 915
 916    /* Evaluators group */
 917    ctx->Eval.Map1Color4 = GL_FALSE;
 918    ctx->Eval.Map1Index = GL_FALSE;
 919    ctx->Eval.Map1Normal = GL_FALSE;
 920    ctx->Eval.Map1TextureCoord1 = GL_FALSE;
 921    ctx->Eval.Map1TextureCoord2 = GL_FALSE;
 922    ctx->Eval.Map1TextureCoord3 = GL_FALSE;
 923    ctx->Eval.Map1TextureCoord4 = GL_FALSE;
 924    ctx->Eval.Map1Vertex3 = GL_FALSE;
 925    ctx->Eval.Map1Vertex4 = GL_FALSE;
 926    ctx->Eval.Map2Color4 = GL_FALSE;
 927    ctx->Eval.Map2Index = GL_FALSE;
 928    ctx->Eval.Map2Normal = GL_FALSE;
 929    ctx->Eval.Map2TextureCoord1 = GL_FALSE;
 930    ctx->Eval.Map2TextureCoord2 = GL_FALSE;
 931    ctx->Eval.Map2TextureCoord3 = GL_FALSE;
 932    ctx->Eval.Map2TextureCoord4 = GL_FALSE;
 933    ctx->Eval.Map2Vertex3 = GL_FALSE;
 934    ctx->Eval.Map2Vertex4 = GL_FALSE;
 935    ctx->Eval.AutoNormal = GL_FALSE;
 936    ctx->Eval.MapGrid1un = 1;
 937    ctx->Eval.MapGrid1u1 = 0.0;
 938    ctx->Eval.MapGrid1u2 = 1.0;
 939    ctx->Eval.MapGrid2un = 1;
 940    ctx->Eval.MapGrid2vn = 1;
 941    ctx->Eval.MapGrid2u1 = 0.0;
 942    ctx->Eval.MapGrid2u2 = 1.0;
 943    ctx->Eval.MapGrid2v1 = 0.0;
 944    ctx->Eval.MapGrid2v2 = 1.0;
 945
 946    /* Evaluator data */
 947    {
 948       static GLfloat vertex[4] = { 0.0, 0.0, 0.0, 1.0 };
 949       static GLfloat normal[3] = { 0.0, 0.0, 1.0 };
 950       static GLfloat index[1] = { 1.0 };
 951       static GLfloat color[4] = { 1.0, 1.0, 1.0, 1.0 };
 952       static GLfloat texcoord[4] = { 0.0, 0.0, 0.0, 1.0 };
 953
 954       init_1d_map( &ctx->EvalMap.Map1Vertex3, 3, vertex );
 955       init_1d_map( &ctx->EvalMap.Map1Vertex4, 4, vertex );
 956       init_1d_map( &ctx->EvalMap.Map1Index, 1, index );
 957       init_1d_map( &ctx->EvalMap.Map1Color4, 4, color );
 958       init_1d_map( &ctx->EvalMap.Map1Normal, 3, normal );
 959       init_1d_map( &ctx->EvalMap.Map1Texture1, 1, texcoord );
 960       init_1d_map( &ctx->EvalMap.Map1Texture2, 2, texcoord );
 961       init_1d_map( &ctx->EvalMap.Map1Texture3, 3, texcoord );
 962       init_1d_map( &ctx->EvalMap.Map1Texture4, 4, texcoord );
 963
 964       init_2d_map( &ctx->EvalMap.Map2Vertex3, 3, vertex );
 965       init_2d_map( &ctx->EvalMap.Map2Vertex4, 4, vertex );
 966       init_2d_map( &ctx->EvalMap.Map2Index, 1, index );
 967       init_2d_map( &ctx->EvalMap.Map2Color4, 4, color );
 968       init_2d_map( &ctx->EvalMap.Map2Normal, 3, normal );
 969       init_2d_map( &ctx->EvalMap.Map2Texture1, 1, texcoord );
 970       init_2d_map( &ctx->EvalMap.Map2Texture2, 2, texcoord );
 971       init_2d_map( &ctx->EvalMap.Map2Texture3, 3, texcoord );
 972       init_2d_map( &ctx->EvalMap.Map2Texture4, 4, texcoord );
 973    }
 974
 975    /* Fog group */
 976    ctx->Fog.Enabled = GL_FALSE;
 977    ctx->Fog.Mode = GL_EXP;
 978    ASSIGN_4V( ctx->Fog.Color, 0.0, 0.0, 0.0, 0.0 );
 979    ctx->Fog.Index = 0.0;
 980    ctx->Fog.Density = 1.0;
 981    ctx->Fog.Start = 0.0;
 982    ctx->Fog.End = 1.0;
 983
 984    /* Hint group */
 985    ctx->Hint.PerspectiveCorrection = GL_DONT_CARE;
 986    ctx->Hint.PointSmooth = GL_DONT_CARE;
 987    ctx->Hint.LineSmooth = GL_DONT_CARE;
 988    ctx->Hint.PolygonSmooth = GL_DONT_CARE;
 989    ctx->Hint.Fog = GL_DONT_CARE;
 990
 991    ctx->Hint.AllowDrawWin = GL_TRUE;
 992    ctx->Hint.AllowDrawSpn = GL_TRUE;
 993    ctx->Hint.AllowDrawMem = GL_TRUE;
 994    ctx->Hint.StrictLighting = GL_TRUE;
 995
 996    /* Pipeline */
 997    gl_pipeline_init( ctx );
 998    gl_cva_init( ctx );
 999
1000    /* Extensions */
1001    gl_extensions_ctr( ctx );
1002
1003    ctx->AllowVertexCull = CLIP_CULLED_BIT;
1004
1005    /* Lighting group */
1006    for (i=0;i<MAX_LIGHTS;i++) {
1007       init_light( &ctx->Light.Light[i], i );
1008    }
1009    make_empty_list( &ctx->Light.EnabledList );
1010
1011    init_lightmodel( &ctx->Light.Model );
1012    init_material( &ctx->Light.Material[0] );
1013    init_material( &ctx->Light.Material[1] );
1014    ctx->Light.ShadeModel = GL_SMOOTH;
1015    ctx->Light.Enabled = GL_FALSE;
1016    ctx->Light.ColorMaterialFace = GL_FRONT_AND_BACK;
1017    ctx->Light.ColorMaterialMode = GL_AMBIENT_AND_DIFFUSE;
1018    ctx->Light.ColorMaterialBitmask
1019       = gl_material_bitmask( ctx,
1020                              GL_FRONT_AND_BACK,
1021                              GL_AMBIENT_AND_DIFFUSE, ~0, 0 );
1022
1023    ctx->Light.ColorMaterialEnabled = GL_FALSE;
1024
1025    /* Lighting miscellaneous */
1026    ctx->ShineTabList = MALLOC_STRUCT( gl_shine_tab );
1027    make_empty_list( ctx->ShineTabList );
1028    for (i = 0 ; i < 10 ; i++) {
1029       struct gl_shine_tab *s = MALLOC_STRUCT( gl_shine_tab );
1030       s->shininess = -1;
1031       s->refcount = 0;
1032       insert_at_tail( ctx->ShineTabList, s );
1033    }
1034    for (i = 0 ; i < 4 ; i++) {
1035       ctx->ShineTable[i] = ctx->ShineTabList->prev;
1036       ctx->ShineTable[i]->refcount++;
1037    }
1038
1039
1040    /* Line group */
1041    ctx->Line.SmoothFlag = GL_FALSE;
1042    ctx->Line.StippleFlag = GL_FALSE;
1043    ctx->Line.Width = 1.0;
1044    ctx->Line.StipplePattern = 0xffff;
1045    ctx->Line.StippleFactor = 1;
1046
1047    /* Display List group */
1048    ctx->List.ListBase = 0;
1049
1050    /* Pixel group */
1051    ctx->Pixel.RedBias = 0.0;
1052    ctx->Pixel.RedScale = 1.0;
1053    ctx->Pixel.GreenBias = 0.0;
1054    ctx->Pixel.GreenScale = 1.0;
1055    ctx->Pixel.BlueBias = 0.0;
1056    ctx->Pixel.BlueScale = 1.0;
1057    ctx->Pixel.AlphaBias = 0.0;
1058    ctx->Pixel.AlphaScale = 1.0;
1059    ctx->Pixel.ScaleOrBiasRGBA = GL_FALSE;
1060    ctx->Pixel.DepthBias = 0.0;
1061    ctx->Pixel.DepthScale = 1.0;
1062    ctx->Pixel.IndexOffset = 0;
1063    ctx->Pixel.IndexShift = 0;
1064    ctx->Pixel.ZoomX = 1.0;
1065    ctx->Pixel.ZoomY = 1.0;
1066    ctx->Pixel.MapColorFlag = GL_FALSE;
1067    ctx->Pixel.MapStencilFlag = GL_FALSE;
1068    ctx->Pixel.MapStoSsize = 1;
1069    ctx->Pixel.MapItoIsize = 1;
1070    ctx->Pixel.MapItoRsize = 1;
1071    ctx->Pixel.MapItoGsize = 1;
1072    ctx->Pixel.MapItoBsize = 1;
1073    ctx->Pixel.MapItoAsize = 1;
1074    ctx->Pixel.MapRtoRsize = 1;
1075    ctx->Pixel.MapGtoGsize = 1;
1076    ctx->Pixel.MapBtoBsize = 1;
1077    ctx->Pixel.MapAtoAsize = 1;
1078    ctx->Pixel.MapStoS[0] = 0;
1079    ctx->Pixel.MapItoI[0] = 0;
1080    ctx->Pixel.MapItoR[0] = 0.0;
1081    ctx->Pixel.MapItoG[0] = 0.0;
1082    ctx->Pixel.MapItoB[0] = 0.0;
1083    ctx->Pixel.MapItoA[0] = 0.0;
1084    ctx->Pixel.MapItoR8[0] = 0;
1085    ctx->Pixel.MapItoG8[0] = 0;
1086    ctx->Pixel.MapItoB8[0] = 0;
1087    ctx->Pixel.MapItoA8[0] = 0;
1088    ctx->Pixel.MapRtoR[0] = 0.0;
1089    ctx->Pixel.MapGtoG[0] = 0.0;
1090    ctx->Pixel.MapBtoB[0] = 0.0;
1091    ctx->Pixel.MapAtoA[0] = 0.0;
1092
1093    /* Point group */
1094    ctx->Point.SmoothFlag = GL_FALSE;
1095    ctx->Point.Size = 1.0;
1096    ctx->Point.Params[0] = 1.0;
1097    ctx->Point.Params[1] = 0.0;
1098    ctx->Point.Params[2] = 0.0;
1099    ctx->Point.Attenuated = GL_FALSE;
1100    ctx->Point.MinSize = 0.0;
1101    ctx->Point.MaxSize = (GLfloat) MAX_POINT_SIZE;
1102    ctx->Point.Threshold = 1.0;
1103
1104    /* Polygon group */
1105    ctx->Polygon.CullFlag = GL_FALSE;
1106    ctx->Polygon.CullFaceMode = GL_BACK;
1107    ctx->Polygon.FrontFace = GL_CCW;
1108    ctx->Polygon.FrontBit = 0;
1109    ctx->Polygon.FrontMode = GL_FILL;
1110    ctx->Polygon.BackMode = GL_FILL;
1111    ctx->Polygon.Unfilled = GL_FALSE;
1112    ctx->Polygon.SmoothFlag = GL_FALSE;
1113    ctx->Polygon.StippleFlag = GL_FALSE;
1114    ctx->Polygon.OffsetFactor = 0.0F;
1115    ctx->Polygon.OffsetUnits = 0.0F;
1116    ctx->Polygon.OffsetPoint = GL_FALSE;
1117    ctx->Polygon.OffsetLine = GL_FALSE;
1118    ctx->Polygon.OffsetFill = GL_FALSE;
1119
1120    /* Polygon Stipple group */
1121    MEMSET( ctx->PolygonStipple, 0xff, 32*sizeof(GLuint) );
1122
1123    /* Scissor group */
1124    ctx->Scissor.Enabled = GL_FALSE;
1125    ctx->Scissor.X = 0;
1126    ctx->Scissor.Y = 0;
1127    ctx->Scissor.Width = 0;
1128    ctx->Scissor.Height = 0;
1129
1130    /* Stencil group */
1131    ctx->Stencil.Enabled = GL_FALSE;
1132    ctx->Stencil.Function = GL_ALWAYS;
1133    ctx->Stencil.FailFunc = GL_KEEP;
1134    ctx->Stencil.ZPassFunc = GL_KEEP;
1135    ctx->Stencil.ZFailFunc = GL_KEEP;
1136    ctx->Stencil.Ref = 0;
1137    ctx->Stencil.ValueMask = STENCIL_MAX;
1138    ctx->Stencil.Clear = 0;
1139    ctx->Stencil.WriteMask = STENCIL_MAX;
1140
1141    /* Texture group */
1142    ctx->Texture.CurrentUnit = 0;      /* multitexture */
1143    ctx->Texture.CurrentTransformUnit = 0; /* multitexture */
1144    ctx->Texture.Enabled = 0;
1145    for (i=0; i<MAX_TEXTURE_UNITS; i++)
1146       init_texture_unit( ctx, i );
1147    init_color_table(&ctx->Texture.Palette);
1148
1149    /* Transformation group */
1150    ctx->Transform.MatrixMode = GL_MODELVIEW;
1151    ctx->Transform.Normalize = GL_FALSE;
1152    ctx->Transform.RescaleNormals = GL_FALSE;
1153    for (i=0;i<MAX_CLIP_PLANES;i++) {
1154       ctx->Transform.ClipEnabled[i] = GL_FALSE;
1155       ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 );
1156    }
1157    ctx->Transform.AnyClip = GL_FALSE;
1158
1159    /* Viewport group */
1160    ctx->Viewport.X = 0;
1161    ctx->Viewport.Y = 0;
1162    ctx->Viewport.Width = 0;
1163    ctx->Viewport.Height = 0;
1164    ctx->Viewport.Near = 0.0;
1165    ctx->Viewport.Far = 1.0;
1166    gl_matrix_ctr(&ctx->Viewport.WindowMap);
1167
1168 #define Sz 10
1169 #define Tz 14
1170    ctx->Viewport.WindowMap.m[Sz] = 0.5 * ctx->Visual->DepthMaxF;
1171    ctx->Viewport.WindowMap.m[Tz] = 0.5 * ctx->Visual->DepthMaxF;
1172 #undef Sz
1173 #undef Tz
1174
1175    ctx->Viewport.WindowMap.flags = MAT_FLAG_GENERAL_SCALE|MAT_FLAG_TRANSLATION;
1176    ctx->Viewport.WindowMap.type = MATRIX_3D_NO_ROT;
1177
1178    /* Vertex arrays */
1179    ctx->Array.Vertex.Size = 4;
1180    ctx->Array.Vertex.Type = GL_FLOAT;
1181    ctx->Array.Vertex.Stride = 0;
1182    ctx->Array.Vertex.StrideB = 0;
1183    ctx->Array.Vertex.Ptr = NULL;
1184    ctx->Array.Vertex.Enabled = GL_FALSE;
1185    ctx->Array.Normal.Type = GL_FLOAT;
1186    ctx->Array.Normal.Stride = 0;
1187    ctx->Array.Normal.StrideB = 0;
1188    ctx->Array.Normal.Ptr = NULL;
1189    ctx->Array.Normal.Enabled = GL_FALSE;
1190    ctx->Array.Color.Size = 4;
1191    ctx->Array.Color.Type = GL_FLOAT;
1192    ctx->Array.Color.Stride = 0;
1193    ctx->Array.Color.StrideB = 0;
1194    ctx->Array.Color.Ptr = NULL;
1195    ctx->Array.Color.Enabled = GL_FALSE;
1196    ctx->Array.Index.Type = GL_FLOAT;
1197    ctx->Array.Index.Stride = 0;
1198    ctx->Array.Index.StrideB = 0;
1199    ctx->Array.Index.Ptr = NULL;
1200    ctx->Array.Index.Enabled = GL_FALSE;
1201    for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
1202       ctx->Array.TexCoord[i].Size = 4;
1203       ctx->Array.TexCoord[i].Type = GL_FLOAT;
1204       ctx->Array.TexCoord[i].Stride = 0;
1205       ctx->Array.TexCoord[i].StrideB = 0;
1206       ctx->Array.TexCoord[i].Ptr = NULL;
1207       ctx->Array.TexCoord[i].Enabled = GL_FALSE;
1208    }
1209    ctx->Array.TexCoordInterleaveFactor = 1;
1210    ctx->Array.EdgeFlag.Stride = 0;
1211    ctx->Array.EdgeFlag.StrideB = 0;
1212    ctx->Array.EdgeFlag.Ptr = NULL;
1213    ctx->Array.EdgeFlag.Enabled = GL_FALSE;
1214    ctx->Array.ActiveTexture = 0;   /* GL_ARB_multitexture */
1215
1216    /* Pixel transfer */
1217    ctx->Pack.Alignment = 4;
1218    ctx->Pack.RowLength = 0;
1219    ctx->Pack.ImageHeight = 0;
1220    ctx->Pack.SkipPixels = 0;
1221    ctx->Pack.SkipRows = 0;
1222    ctx->Pack.SkipImages = 0;
1223    ctx->Pack.SwapBytes = GL_FALSE;
1224    ctx->Pack.LsbFirst = GL_FALSE;
1225    ctx->Unpack.Alignment = 4;
1226    ctx->Unpack.RowLength = 0;
1227    ctx->Unpack.ImageHeight = 0;
1228    ctx->Unpack.SkipPixels = 0;
1229    ctx->Unpack.SkipRows = 0;
1230    ctx->Unpack.SkipImages = 0;
1231    ctx->Unpack.SwapBytes = GL_FALSE;
1232    ctx->Unpack.LsbFirst = GL_FALSE;
1233
1234    /* Feedback */
1235    ctx->Feedback.Type = GL_2D;   /* TODO: verify */
1236    ctx->Feedback.Buffer = NULL;
1237    ctx->Feedback.BufferSize = 0;
1238    ctx->Feedback.Count = 0;
1239
1240    /* Selection/picking */
1241    ctx->Select.Buffer = NULL;
1242    ctx->Select.BufferSize = 0;
1243    ctx->Select.BufferCount = 0;
1244    ctx->Select.Hits = 0;
1245    ctx->Select.NameStackDepth = 0;
1246
1247    /* Optimized Accum buffer */
1248    ctx->IntegerAccumMode = GL_TRUE;
1249    ctx->IntegerAccumScaler = 0.0;
1250
1251    /* Renderer and client attribute stacks */
1252    ctx->AttribStackDepth = 0;
1253    ctx->ClientAttribStackDepth = 0;
1254
1255    /* Miscellaneous */
1256    ctx->NewState = NEW_ALL;
1257    ctx->RenderMode = GL_RENDER;
1258    ctx->StippleCounter = 0;
1259    ctx->NeedNormals = GL_FALSE;
1260    ctx->DoViewportMapping = GL_TRUE;
1261
1262    ctx->NeedEyeCoords = GL_FALSE;
1263    ctx->NeedEyeNormals = GL_FALSE;
1264    ctx->vb_proj_matrix = &ctx->ModelProjectMatrix;
1265
1266    /* Display list */
1267    ctx->CallDepth = 0;
1268    ctx->ExecuteFlag = GL_TRUE;
1269    ctx->CompileFlag = GL_FALSE;
1270    ctx->CurrentListPtr = NULL;
1271    ctx->CurrentBlock = NULL;
1272    ctx->CurrentListNum = 0;
1273    ctx->CurrentPos = 0;
1274
1275    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
1276
1277    ctx->CatchSignals = GL_TRUE;
1278    ctx->OcclusionResult = GL_FALSE;
1279    ctx->OcclusionResultSaved = GL_FALSE;
1280
1281    /* For debug/development only */
1282    ctx->NoRaster = getenv("MESA_NO_RASTER") ? GL_TRUE : GL_FALSE;
1283    ctx->FirstTimeCurrent = GL_TRUE;
1284
1285    /* Dither disable */
1286    ctx->NoDither = getenv("MESA_NO_DITHER") ? GL_TRUE : GL_FALSE;
1287    if (ctx->NoDither) {
1288       if (getenv("MESA_DEBUG")) {
1289          fprintf(stderr, "MESA_NO_DITHER set - dithering disabled\n");
1290       }
1291       ctx->Color.DitherFlag = GL_FALSE;
1292    }
1293 }
1294
1295
1296
1297
1298 /*
1299  * Allocate the proxy textures.  If we run out of memory part way through
1300  * the allocations clean up and return GL_FALSE.
1301  * Return:  GL_TRUE=success, GL_FALSE=failure
1302  */
1303 static GLboolean alloc_proxy_textures( GLcontext *ctx )
1304 {
1305    GLboolean out_of_memory;
1306    GLint i;
1307
1308    ctx->Texture.Proxy1D = gl_alloc_texture_object(NULL, 0, 1);
1309    if (!ctx->Texture.Proxy1D) {
1310       return GL_FALSE;
1311    }
1312
1313    ctx->Texture.Proxy2D = gl_alloc_texture_object(NULL, 0, 2);
1314    if (!ctx->Texture.Proxy2D) {
1315       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1316       return GL_FALSE;
1317    }
1318
1319    ctx->Texture.Proxy3D = gl_alloc_texture_object(NULL, 0, 3);
1320    if (!ctx->Texture.Proxy3D) {
1321       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1322       gl_free_texture_object(NULL, ctx->Texture.Proxy2D);
1323       return GL_FALSE;
1324    }
1325
1326    out_of_memory = GL_FALSE;
1327    for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
1328       ctx->Texture.Proxy1D->Image[i] = _mesa_alloc_texture_image();
1329       ctx->Texture.Proxy2D->Image[i] = _mesa_alloc_texture_image();
1330       ctx->Texture.Proxy3D->Image[i] = _mesa_alloc_texture_image();
1331       if (!ctx->Texture.Proxy1D->Image[i]
1332           || !ctx->Texture.Proxy2D->Image[i]
1333           || !ctx->Texture.Proxy3D->Image[i]) {
1334          out_of_memory = GL_TRUE;
1335       }
1336    }
1337    if (out_of_memory) {
1338       for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
1339          if (ctx->Texture.Proxy1D->Image[i]) {
1340             _mesa_free_texture_image(ctx->Texture.Proxy1D->Image[i]);
1341          }
1342          if (ctx->Texture.Proxy2D->Image[i]) {
1343             _mesa_free_texture_image(ctx->Texture.Proxy2D->Image[i]);
1344          }
1345          if (ctx->Texture.Proxy3D->Image[i]) {
1346             _mesa_free_texture_image(ctx->Texture.Proxy3D->Image[i]);
1347          }
1348       }
1349       gl_free_texture_object(NULL, ctx->Texture.Proxy1D);
1350       gl_free_texture_object(NULL, ctx->Texture.Proxy2D);
1351       gl_free_texture_object(NULL, ctx->Texture.Proxy3D);
1352       return GL_FALSE;
1353    }
1354    else {
1355       return GL_TRUE;
1356    }
1357 }
1358
1359
1360
1361 /*
1362  * Initialize a GLcontext struct.
1363  */
1364 GLboolean gl_initialize_context_data( GLcontext *ctx,
1365                                       GLvisual *visual,
1366                                       GLcontext *share_list,
1367                                       void *driver_ctx,
1368                                       GLboolean direct )
1369 {
1370    (void) direct;  /* not used */
1371
1372    /* misc one-time initializations */
1373    one_time_init();
1374
1375    ctx->DriverCtx = driver_ctx;
1376    ctx->Visual = visual;
1377    ctx->DrawBuffer = NULL;
1378    ctx->ReadBuffer = NULL;
1379
1380    ctx->VB = gl_vb_create_for_immediate( ctx );
1381    if (!ctx->VB) {
1382       FREE( ctx );
1383       return GL_FALSE;
1384    }
1385    ctx->input = ctx->VB->IM;
1386
1387    ctx->PB = gl_alloc_pb();
1388    if (!ctx->PB) {
1389       FREE( ctx->VB );
1390       FREE( ctx );
1391       return GL_FALSE;
1392    }
1393
1394    if (share_list) {
1395       /* share the group of display lists of another context */
1396       ctx->Shared = share_list->Shared;
1397    }
1398    else {
1399       /* allocate new group of display lists */
1400       ctx->Shared = alloc_shared_state();
1401       if (!ctx->Shared) {
1402          FREE(ctx->VB);
1403          FREE(ctx->PB);
1404          FREE(ctx);
1405          return GL_FALSE;
1406       }
1407    }
1408    _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1409    ctx->Shared->RefCount++;
1410    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1411
1412    init_attrib_groups( ctx );
1413
1414    gl_reset_vb( ctx->VB );
1415    gl_reset_input( ctx );
1416
1417    if (visual->DBflag) {
1418       ctx->Color.DrawBuffer = GL_BACK;
1419       ctx->Color.DriverDrawBuffer = GL_BACK_LEFT;
1420       ctx->Color.DrawDestMask = BACK_LEFT_BIT;
1421       ctx->Pixel.ReadBuffer = GL_BACK;
1422       ctx->Pixel.DriverReadBuffer = GL_BACK_LEFT;
1423    }
1424    else {
1425       ctx->Color.DrawBuffer = GL_FRONT;
1426       ctx->Color.DriverDrawBuffer = GL_FRONT_LEFT;
1427       ctx->Color.DrawDestMask = FRONT_LEFT_BIT;
1428       ctx->Pixel.ReadBuffer = GL_FRONT;
1429       ctx->Pixel.DriverReadBuffer = GL_FRONT_LEFT;
1430    }
1431
1432 #ifdef PROFILE
1433    init_timings( ctx );
1434 #endif
1435
1436    if (!alloc_proxy_textures(ctx)) {
1437       free_shared_state(ctx, ctx->Shared);
1438       FREE(ctx->VB);
1439       FREE(ctx->PB);
1440       FREE(ctx);
1441       return GL_FALSE;
1442    }
1443
1444    /* setup API dispatch tables */
1445    ctx->Exec = (struct _glapi_table *) CALLOC(_glapi_get_dispatch_table_size() * sizeof(void *));
1446    ctx->Save = (struct _glapi_table *) CALLOC(_glapi_get_dispatch_table_size() * sizeof(void *));
1447    if (!ctx->Exec || !ctx->Save) {
1448       free_shared_state(ctx, ctx->Shared);
1449       FREE(ctx->VB);
1450       FREE(ctx->PB);
1451       if (ctx->Exec)
1452          FREE(ctx->Exec);
1453       FREE(ctx);
1454    }
1455    _mesa_init_exec_table( ctx->Exec );
1456    _mesa_init_dlist_table( ctx->Save );
1457    ctx->CurrentDispatch = ctx->Exec;
1458
1459    return GL_TRUE;
1460 }
1461
1462
1463
1464 /*
1465  * Allocate and initialize a GLcontext structure.
1466  * Input:  visual - a GLvisual pointer
1467  *         sharelist - another context to share display lists with or NULL
1468  *         driver_ctx - pointer to device driver's context state struct
1469  * Return:  pointer to a new gl_context struct or NULL if error.
1470  */
1471 GLcontext *gl_create_context( GLvisual *visual,
1472                               GLcontext *share_list,
1473                               void *driver_ctx,
1474                               GLboolean direct )
1475 {
1476    GLcontext *ctx = (GLcontext *) CALLOC( sizeof(GLcontext) );
1477    if (!ctx) {
1478       return NULL;
1479    }
1480
1481    if (gl_initialize_context_data(ctx, visual, share_list,
1482                                   driver_ctx, direct)) {
1483       return ctx;
1484    }
1485    else {
1486       FREE(ctx);
1487       return NULL;
1488    }
1489 }
1490
1491
1492
1493 /*
1494  * Free the data associated with the given context.
1495  * But don't free() the GLcontext struct itself!
1496  */
1497 void gl_free_context_data( GLcontext *ctx )
1498 {
1499    struct gl_shine_tab *s, *tmps;
1500    GLuint i, j;
1501
1502    /* if we're destroying the current context, unbind it first */
1503    if (ctx == gl_get_current_context()) {
1504       gl_make_current(NULL, NULL);
1505    }
1506
1507 #ifdef PROFILE
1508    if (getenv("MESA_PROFILE")) {
1509       print_timings( ctx );
1510    }
1511 #endif
1512
1513    gl_matrix_dtr( &ctx->ModelView );
1514    for (i = 0; i < MAX_MODELVIEW_STACK_DEPTH - 1; i++) {
1515       gl_matrix_dtr( &ctx->ModelViewStack[i] );
1516    }
1517    gl_matrix_dtr( &ctx->ProjectionMatrix );
1518    for (i = 0; i < MAX_PROJECTION_STACK_DEPTH - 1; i++) {
1519       gl_matrix_dtr( &ctx->ProjectionStack[i] );
1520    }
1521    for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
1522       gl_matrix_dtr( &ctx->TextureMatrix[i] );
1523       for (j = 0; j < MAX_TEXTURE_STACK_DEPTH - 1; j++) {
1524          gl_matrix_dtr( &ctx->TextureStack[i][j] );
1525       }
1526    }
1527
1528    FREE( ctx->PB );
1529
1530    if(ctx->input != ctx->VB->IM)
1531       gl_immediate_free( ctx->input );
1532
1533    gl_vb_free( ctx->VB );
1534
1535    _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1536    ctx->Shared->RefCount--;
1537    assert(ctx->Shared->RefCount >= 0);
1538    _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1539    if (ctx->Shared->RefCount == 0) {
1540       /* free shared state */
1541       free_shared_state( ctx, ctx->Shared );
1542    }
1543
1544    foreach_s( s, tmps, ctx->ShineTabList ) {
1545       FREE( s );
1546    }
1547    FREE( ctx->ShineTabList );
1548
1549    /* Free proxy texture objects */
1550    gl_free_texture_object( NULL, ctx->Texture.Proxy1D );
1551    gl_free_texture_object( NULL, ctx->Texture.Proxy2D );
1552    gl_free_texture_object( NULL, ctx->Texture.Proxy3D );
1553
1554    /* Free evaluator data */
1555    if (ctx->EvalMap.Map1Vertex3.Points)
1556       FREE( ctx->EvalMap.Map1Vertex3.Points );
1557    if (ctx->EvalMap.Map1Vertex4.Points)
1558       FREE( ctx->EvalMap.Map1Vertex4.Points );
1559    if (ctx->EvalMap.Map1Index.Points)
1560       FREE( ctx->EvalMap.Map1Index.Points );
1561    if (ctx->EvalMap.Map1Color4.Points)
1562       FREE( ctx->EvalMap.Map1Color4.Points );
1563    if (ctx->EvalMap.Map1Normal.Points)
1564       FREE( ctx->EvalMap.Map1Normal.Points );
1565    if (ctx->EvalMap.Map1Texture1.Points)
1566       FREE( ctx->EvalMap.Map1Texture1.Points );
1567    if (ctx->EvalMap.Map1Texture2.Points)
1568       FREE( ctx->EvalMap.Map1Texture2.Points );
1569    if (ctx->EvalMap.Map1Texture3.Points)
1570       FREE( ctx->EvalMap.Map1Texture3.Points );
1571    if (ctx->EvalMap.Map1Texture4.Points)
1572       FREE( ctx->EvalMap.Map1Texture4.Points );
1573
1574    if (ctx->EvalMap.Map2Vertex3.Points)
1575       FREE( ctx->EvalMap.Map2Vertex3.Points );
1576    if (ctx->EvalMap.Map2Vertex4.Points)
1577       FREE( ctx->EvalMap.Map2Vertex4.Points );
1578    if (ctx->EvalMap.Map2Index.Points)
1579       FREE( ctx->EvalMap.Map2Index.Points );
1580    if (ctx->EvalMap.Map2Color4.Points)
1581       FREE( ctx->EvalMap.Map2Color4.Points );
1582    if (ctx->EvalMap.Map2Normal.Points)
1583       FREE( ctx->EvalMap.Map2Normal.Points );
1584    if (ctx->EvalMap.Map2Texture1.Points)
1585       FREE( ctx->EvalMap.Map2Texture1.Points );
1586    if (ctx->EvalMap.Map2Texture2.Points)
1587       FREE( ctx->EvalMap.Map2Texture2.Points );
1588    if (ctx->EvalMap.Map2Texture3.Points)
1589       FREE( ctx->EvalMap.Map2Texture3.Points );
1590    if (ctx->EvalMap.Map2Texture4.Points)
1591       FREE( ctx->EvalMap.Map2Texture4.Points );
1592
1593    /* Free cache of immediate buffers. */
1594    while (ctx->nr_im_queued-- > 0) {
1595       struct immediate * next = ctx->freed_im_queue->next;
1596       FREE( ctx->freed_im_queue );
1597       ctx->freed_im_queue = next;
1598    }
1599    gl_extensions_dtr(ctx);
1600
1601    FREE(ctx->Exec);
1602    FREE(ctx->Save);
1603 }
1604
1605
1606
1607 /*
1608  * Destroy a GLcontext structure.
1609  */
1610 void gl_destroy_context( GLcontext *ctx )
1611 {
1612    if (ctx) {
1613       gl_free_context_data(ctx);
1614       FREE( (void *) ctx );
1615    }
1616 }
1617
1618
1619
1620 /*
1621  * Called by the driver after both the context and driver are fully
1622  * initialized.  Currently just reads the config file.
1623  */
1624 void gl_context_initialize( GLcontext *ctx )
1625 {
1626    gl_read_config_file( ctx );
1627 }
1628
1629
1630
1631 /*
1632  * Copy attribute groups from one context to another.
1633  * Input:  src - source context
1634  *         dst - destination context
1635  *         mask - bitwise OR of GL_*_BIT flags
1636  */
1637 void gl_copy_context( const GLcontext *src, GLcontext *dst, GLuint mask )
1638 {
1639    if (mask & GL_ACCUM_BUFFER_BIT) {
1640       MEMCPY( &dst->Accum, &src->Accum, sizeof(struct gl_accum_attrib) );
1641    }
1642    if (mask & GL_COLOR_BUFFER_BIT) {
1643       MEMCPY( &dst->Color, &src->Color, sizeof(struct gl_colorbuffer_attrib) );
1644    }
1645    if (mask & GL_CURRENT_BIT) {
1646       MEMCPY( &dst->Current, &src->Current, sizeof(struct gl_current_attrib) );
1647    }
1648    if (mask & GL_DEPTH_BUFFER_BIT) {
1649       MEMCPY( &dst->Depth, &src->Depth, sizeof(struct gl_depthbuffer_attrib) );
1650    }
1651    if (mask & GL_ENABLE_BIT) {
1652       /* no op */
1653    }
1654    if (mask & GL_EVAL_BIT) {
1655       MEMCPY( &dst->Eval, &src->Eval, sizeof(struct gl_eval_attrib) );
1656    }
1657    if (mask & GL_FOG_BIT) {
1658       MEMCPY( &dst->Fog, &src->Fog, sizeof(struct gl_fog_attrib) );
1659    }
1660    if (mask & GL_HINT_BIT) {
1661       MEMCPY( &dst->Hint, &src->Hint, sizeof(struct gl_hint_attrib) );
1662    }
1663    if (mask & GL_LIGHTING_BIT) {
1664       MEMCPY( &dst->Light, &src->Light, sizeof(struct gl_light_attrib) );
1665       /*       gl_reinit_light_attrib( &dst->Light ); */
1666    }
1667    if (mask & GL_LINE_BIT) {
1668       MEMCPY( &dst->Line, &src->Line, sizeof(struct gl_line_attrib) );
1669    }
1670    if (mask & GL_LIST_BIT) {
1671       MEMCPY( &dst->List, &src->List, sizeof(struct gl_list_attrib) );
1672    }
1673    if (mask & GL_PIXEL_MODE_BIT) {
1674       MEMCPY( &dst->Pixel, &src->Pixel, sizeof(struct gl_pixel_attrib) );
1675    }
1676    if (mask & GL_POINT_BIT) {
1677       MEMCPY( &dst->Point, &src->Point, sizeof(struct gl_point_attrib) );
1678    }
1679    if (mask & GL_POLYGON_BIT) {
1680       MEMCPY( &dst->Polygon, &src->Polygon, sizeof(struct gl_polygon_attrib) );
1681    }
1682    if (mask & GL_POLYGON_STIPPLE_BIT) {
1683       /* Use loop instead of MEMCPY due to problem with Portland Group's
1684        * C compiler.  Reported by John Stone.
1685        */
1686       int i;
1687       for (i=0;i<32;i++) {
1688          dst->PolygonStipple[i] = src->PolygonStipple[i];
1689       }
1690    }
1691    if (mask & GL_SCISSOR_BIT) {
1692       MEMCPY( &dst->Scissor, &src->Scissor, sizeof(struct gl_scissor_attrib) );
1693    }
1694    if (mask & GL_STENCIL_BUFFER_BIT) {
1695       MEMCPY( &dst->Stencil, &src->Stencil, sizeof(struct gl_stencil_attrib) );
1696    }
1697    if (mask & GL_TEXTURE_BIT) {
1698       MEMCPY( &dst->Texture, &src->Texture, sizeof(struct gl_texture_attrib) );
1699    }
1700    if (mask & GL_TRANSFORM_BIT) {
1701       MEMCPY( &dst->Transform, &src->Transform, sizeof(struct gl_transform_attrib) );
1702    }
1703    if (mask & GL_VIEWPORT_BIT) {
1704       MEMCPY( &dst->Viewport, &src->Viewport, sizeof(struct gl_viewport_attrib) );
1705    }
1706 }
1707
1708
1709 /*
1710  * Set the current context, binding the given frame buffer to the context.
1711  */
1712 void gl_make_current( GLcontext *newCtx, GLframebuffer *buffer )
1713 {
1714    gl_make_current2( newCtx, buffer, buffer );
1715 }
1716
1717
1718 /*
1719  * Bind the given context to the given draw-buffer and read-buffer
1720  * and make it the current context for this thread.
1721  */
1722 void gl_make_current2( GLcontext *newCtx, GLframebuffer *drawBuffer,
1723                        GLframebuffer *readBuffer )
1724 {
1725 #if 0
1726    GLcontext *oldCtx = gl_get_context();
1727
1728    /* Flush the old context
1729     */
1730    if (oldCtx) {
1731       ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(oldCtx, "gl_make_current");
1732
1733       /* unbind frame buffers from context */
1734       if (oldCtx->DrawBuffer) {
1735          oldCtx->DrawBuffer = NULL;
1736       }
1737       if (oldCtx->ReadBuffer) {
1738          oldCtx->ReadBuffer = NULL;
1739       }
1740    }
1741 #endif
1742
1743    /* We call this function periodically (just here for now) in
1744     * order to detect when multithreading has begun.
1745     */
1746    _glapi_check_multithread();
1747
1748    _glapi_set_context((void *) newCtx);
1749    ASSERT(gl_get_current_context() == newCtx);
1750    if (newCtx) {
1751       SET_IMMEDIATE(newCtx, newCtx->input);
1752       _glapi_set_dispatch(newCtx->CurrentDispatch);
1753    }
1754    else {
1755       _glapi_set_dispatch(NULL);  /* none current */
1756    }
1757
1758    if (MESA_VERBOSE) fprintf(stderr, "gl_make_current()\n");
1759
1760    if (newCtx && drawBuffer && readBuffer) {
1761       /* TODO: check if newCtx and buffer's visual match??? */
1762       newCtx->DrawBuffer = drawBuffer;
1763       newCtx->ReadBuffer = readBuffer;
1764       newCtx->NewState = NEW_ALL;   /* just to be safe */
1765       gl_update_state( newCtx );
1766    }
1767
1768    /* We can use this to help debug user's problems.  Tell the to set
1769     * the MESA_INFO env variable before running their app.  Then the
1770     * first time each context is made current we'll print some useful
1771     * information.
1772     */
1773    if (newCtx && newCtx->FirstTimeCurrent) {
1774       if (getenv("MESA_INFO")) {
1775          fprintf(stderr, "Mesa GL_VERSION = %s\n", (char *) _mesa_GetString(GL_VERSION));
1776          fprintf(stderr, "Mesa GL_RENDERER = %s\n", (char *) _mesa_GetString(GL_RENDERER));
1777          fprintf(stderr, "Mesa GL_VENDOR = %s\n", (char *) _mesa_GetString(GL_VENDOR));
1778          fprintf(stderr, "Mesa GL_EXTENSIONS = %s\n", (char *) _mesa_GetString(GL_EXTENSIONS));
1779 #if defined(THREADS)
1780          fprintf(stderr, "Mesa thread-safe: YES\n");
1781 #else
1782          fprintf(stderr, "Mesa thread-safe: NO\n");
1783 #endif
1784 #if defined(USE_X86_ASM)
1785          fprintf(stderr, "Mesa x86-optimized: YES\n");
1786 #else
1787          fprintf(stderr, "Mesa x86-optimized: NO\n");
1788 #endif
1789       }
1790       newCtx->FirstTimeCurrent = GL_FALSE;
1791    }
1792 }
1793
1794
1795
1796 /*
1797  * Return current context handle for the calling thread.
1798  * This isn't the fastest way to get the current context.
1799  * If you need speed, see the GET_CURRENT_CONTEXT() macro in context.h
1800  */
1801 GLcontext *gl_get_current_context( void )
1802 {
1803    return (GLcontext *) _glapi_get_context();
1804 }
1805
1806
1807
1808 /*
1809  * This should be called by device drivers just before they do a
1810  * swapbuffers.  Any pending rendering commands will be executed.
1811  */
1812 void
1813 _mesa_swapbuffers(GLcontext *ctx)
1814 {
1815    FLUSH_VB( ctx, "swap buffers" );
1816 }
1817
1818
1819
1820 /*
1821  * Return pointer to this context's current API dispatch table.
1822  * It'll either be the immediate-mode execute dispatcher or the
1823  * display list compile dispatcher.
1824  */
1825 struct _glapi_table *
1826 _mesa_get_dispatch(GLcontext *ctx)
1827 {
1828    return ctx->CurrentDispatch;
1829 }
1830
1831
1832
1833 /**********************************************************************/
1834 /*****                Miscellaneous functions                     *****/
1835 /**********************************************************************/
1836
1837
1838 /*
1839  * This function is called when the Mesa user has stumbled into a code
1840  * path which may not be implemented fully or correctly.
1841  */
1842 void gl_problem( const GLcontext *ctx, const char *s )
1843 {
1844    fprintf( stderr, "Mesa implementation error: %s\n", s );
1845    fprintf( stderr, "Report to mesa-bugs@mesa3d.org\n" );
1846    (void) ctx;
1847 }
1848
1849
1850
1851 /*
1852  * This is called to inform the user that he or she has tried to do
1853  * something illogical or if there's likely a bug in their program
1854  * (like enabled depth testing without a depth buffer).
1855  */
1856 void gl_warning( const GLcontext *ctx, const char *s )
1857 {
1858    GLboolean debug;
1859 #ifdef DEBUG
1860    debug = GL_TRUE;
1861 #else
1862    if (getenv("MESA_DEBUG")) {
1863       debug = GL_TRUE;
1864    }
1865    else {
1866       debug = GL_FALSE;
1867    }
1868 #endif
1869    if (debug) {
1870       fprintf( stderr, "Mesa warning: %s\n", s );
1871    }
1872    (void) ctx;
1873 }
1874
1875
1876
1877 /*
1878  * Compile an error into current display list.
1879  */
1880 void gl_compile_error( GLcontext *ctx, GLenum error, const char *s )
1881 {
1882    if (ctx->CompileFlag)
1883       gl_save_error( ctx, error, s );
1884
1885    if (ctx->ExecuteFlag)
1886       gl_error( ctx, error, s );
1887 }
1888
1889
1890
1891 /*
1892  * This is Mesa's error handler.  Normally, all that's done is the updating
1893  * of the current error value.  If Mesa is compiled with -DDEBUG or if the
1894  * environment variable "MESA_DEBUG" is defined then a real error message
1895  * is printed to stderr.
1896  * Input:  error - the error value
1897  *         s - a diagnostic string
1898  */
1899 void gl_error( GLcontext *ctx, GLenum error, const char *s )
1900 {
1901    GLboolean debug;
1902
1903 #ifdef DEBUG
1904    debug = GL_TRUE;
1905 #else
1906    if (getenv("MESA_DEBUG")) {
1907       debug = GL_TRUE;
1908    }
1909    else {
1910       debug = GL_FALSE;
1911    }
1912 #endif
1913
1914    if (debug) {
1915       char errstr[1000];
1916
1917       switch (error) {
1918          case GL_NO_ERROR:
1919             strcpy( errstr, "GL_NO_ERROR" );
1920             break;
1921          case GL_INVALID_VALUE:
1922             strcpy( errstr, "GL_INVALID_VALUE" );
1923             break;
1924          case GL_INVALID_ENUM:
1925             strcpy( errstr, "GL_INVALID_ENUM" );
1926             break;
1927          case GL_INVALID_OPERATION:
1928             strcpy( errstr, "GL_INVALID_OPERATION" );
1929             break;
1930          case GL_STACK_OVERFLOW:
1931             strcpy( errstr, "GL_STACK_OVERFLOW" );
1932             break;
1933          case GL_STACK_UNDERFLOW:
1934             strcpy( errstr, "GL_STACK_UNDERFLOW" );
1935             break;
1936          case GL_OUT_OF_MEMORY:
1937             strcpy( errstr, "GL_OUT_OF_MEMORY" );
1938             break;
1939          default:
1940             strcpy( errstr, "unknown" );
1941             break;
1942       }
1943       fprintf( stderr, "Mesa user error: %s in %s\n", errstr, s );
1944    }
1945
1946    if (ctx->ErrorValue==GL_NO_ERROR) {
1947       ctx->ErrorValue = error;
1948    }
1949
1950    /* Call device driver's error handler, if any.  This is used on the Mac. */
1951    if (ctx->Driver.Error) {
1952       (*ctx->Driver.Error)( ctx );
1953    }
1954 }
1955
1956
1957
1958 void
1959 _mesa_Finish( void )
1960 {
1961    GET_CURRENT_CONTEXT(ctx);
1962    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFinish");
1963    if (ctx->Driver.Finish) {
1964       (*ctx->Driver.Finish)( ctx );
1965    }
1966 }
1967
1968
1969
1970 void
1971 _mesa_Flush( void )
1972 {
1973    GET_CURRENT_CONTEXT(ctx);
1974    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFlush");
1975    if (ctx->Driver.Flush) {
1976       (*ctx->Driver.Flush)( ctx );
1977    }
1978 }