src/mesa/main/light.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 #include "glheader.h"
  28 #include "imports.h"
  29 #include "context.h"
  30 #include "enums.h"
  31 #include "light.h"
  32 #include "macros.h"
  33 #include "util/simple_list.h"
  34 #include "mtypes.h"
  35 #include "math/m_matrix.h"
  36
  37
  38 void GLAPIENTRY
  39 _mesa_ShadeModel( GLenum mode )
  40 {
  41    GET_CURRENT_CONTEXT(ctx);
  42
  43    if (MESA_VERBOSE & VERBOSE_API)
  44       _mesa_debug(ctx, "glShadeModel %s\n", _mesa_lookup_enum_by_nr(mode));
  45
  46    if (mode != GL_FLAT && mode != GL_SMOOTH) {
  47       _mesa_error(ctx, GL_INVALID_ENUM, "glShadeModel");
  48       return;
  49    }
  50
  51    if (ctx->Light.ShadeModel == mode)
  52       return;
  53
  54    FLUSH_VERTICES(ctx, _NEW_LIGHT);
  55    ctx->Light.ShadeModel = mode;
  56
  57    if (ctx->Driver.ShadeModel)
  58       ctx->Driver.ShadeModel( ctx, mode );
  59 }
  60
  61
  62 /**
  63  * Set the provoking vertex (the vertex which specifies the prim's
  64  * color when flat shading) to either the first or last vertex of the
  65  * triangle or line.
  66  */
  67 void GLAPIENTRY
  68 _mesa_ProvokingVertex(GLenum mode)
  69 {
  70    GET_CURRENT_CONTEXT(ctx);
  71
  72    if (MESA_VERBOSE&VERBOSE_API)
  73       _mesa_debug(ctx, "glProvokingVertexEXT 0x%x\n", mode);
  74
  75    switch (mode) {
  76    case GL_FIRST_VERTEX_CONVENTION_EXT:
  77    case GL_LAST_VERTEX_CONVENTION_EXT:
  78       break;
  79    default:
  80       _mesa_error(ctx, GL_INVALID_ENUM, "glProvokingVertexEXT(0x%x)", mode);
  81       return;
  82    }
  83
  84    if (ctx->Light.ProvokingVertex == mode)
  85       return;
  86
  87    FLUSH_VERTICES(ctx, _NEW_LIGHT);
  88    ctx->Light.ProvokingVertex = mode;
  89 }
  90
  91
  92 /**
  93  * Helper function called by _mesa_Lightfv and _mesa_PopAttrib to set
  94  * per-light state.
  95  * For GL_POSITION and GL_SPOT_DIRECTION the params position/direction
  96  * will have already been transformed by the modelview matrix!
  97  * Also, all error checking should have already been done.
  98  */
  99 void
 100 _mesa_light(struct gl_context *ctx, GLuint lnum, GLenum pname, const GLfloat *params)
 101 {
 102    struct gl_light *light;
 103
 104    ASSERT(lnum < MAX_LIGHTS);
 105    light = &ctx->Light.Light[lnum];
 106
 107    switch (pname) {
 108    case GL_AMBIENT:
 109       if (TEST_EQ_4V(light->Ambient, params))
 110          return;
 111       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 112       COPY_4V( light->Ambient, params );
 113       break;
 114    case GL_DIFFUSE:
 115       if (TEST_EQ_4V(light->Diffuse, params))
 116          return;
 117       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 118       COPY_4V( light->Diffuse, params );
 119       break;
 120    case GL_SPECULAR:
 121       if (TEST_EQ_4V(light->Specular, params))
 122          return;
 123       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 124       COPY_4V( light->Specular, params );
 125       break;
 126    case GL_POSITION:
 127       /* NOTE: position has already been transformed by ModelView! */
 128       if (TEST_EQ_4V(light->EyePosition, params))
 129          return;
 130       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 131       COPY_4V(light->EyePosition, params);
 132       if (light->EyePosition[3] != 0.0F)
 133          light->_Flags |= LIGHT_POSITIONAL;
 134       else
 135          light->_Flags &= ~LIGHT_POSITIONAL;
 136       break;
 137    case GL_SPOT_DIRECTION:
 138       /* NOTE: Direction already transformed by inverse ModelView! */
 139       if (TEST_EQ_3V(light->SpotDirection, params))
 140          return;
 141       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 142       COPY_3V(light->SpotDirection, params);
 143       break;
 144    case GL_SPOT_EXPONENT:
 145       ASSERT(params[0] >= 0.0);
 146       ASSERT(params[0] <= ctx->Const.MaxSpotExponent);
 147       if (light->SpotExponent == params[0])
 148          return;
 149       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 150       light->SpotExponent = params[0];
 151       break;
 152    case GL_SPOT_CUTOFF:
 153       ASSERT(params[0] == 180.0 || (params[0] >= 0.0 && params[0] <= 90.0));
 154       if (light->SpotCutoff == params[0])
 155          return;
 156       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 157       light->SpotCutoff = params[0];
 158       light->_CosCutoff = (GLfloat) (cos(light->SpotCutoff * DEG2RAD));
 159       if (light->_CosCutoff < 0)
 160          light->_CosCutoff = 0;
 161       if (light->SpotCutoff != 180.0F)
 162          light->_Flags |= LIGHT_SPOT;
 163       else
 164          light->_Flags &= ~LIGHT_SPOT;
 165       break;
 166    case GL_CONSTANT_ATTENUATION:
 167       ASSERT(params[0] >= 0.0);
 168       if (light->ConstantAttenuation == params[0])
 169          return;
 170       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 171       light->ConstantAttenuation = params[0];
 172       break;
 173    case GL_LINEAR_ATTENUATION:
 174       ASSERT(params[0] >= 0.0);
 175       if (light->LinearAttenuation == params[0])
 176          return;
 177       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 178       light->LinearAttenuation = params[0];
 179       break;
 180    case GL_QUADRATIC_ATTENUATION:
 181       ASSERT(params[0] >= 0.0);
 182       if (light->QuadraticAttenuation == params[0])
 183          return;
 184       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 185       light->QuadraticAttenuation = params[0];
 186       break;
 187    default:
 188       _mesa_problem(ctx, "Unexpected pname in _mesa_light()");
 189       return;
 190    }
 191
 192    if (ctx->Driver.Lightfv)
 193       ctx->Driver.Lightfv( ctx, GL_LIGHT0 + lnum, pname, params );
 194 }
 195
 196
 197 void GLAPIENTRY
 198 _mesa_Lightf( GLenum light, GLenum pname, GLfloat param )
 199 {
 200    GLfloat fparam[4];
 201    fparam[0] = param;
 202    fparam[1] = fparam[2] = fparam[3] = 0.0F;
 203    _mesa_Lightfv( light, pname, fparam );
 204 }
 205
 206
 207 void GLAPIENTRY
 208 _mesa_Lightfv( GLenum light, GLenum pname, const GLfloat *params )
 209 {
 210    GET_CURRENT_CONTEXT(ctx);
 211    GLint i = (GLint) (light - GL_LIGHT0);
 212    GLfloat temp[4];
 213
 214    if (i < 0 || i >= (GLint) ctx->Const.MaxLights) {
 215       _mesa_error( ctx, GL_INVALID_ENUM, "glLight(light=0x%x)", light );
 216       return;
 217    }
 218
 219    /* do particular error checks, transformations */
 220    switch (pname) {
 221    case GL_AMBIENT:
 222    case GL_DIFFUSE:
 223    case GL_SPECULAR:
 224       /* nothing */
 225       break;
 226    case GL_POSITION:
 227       /* transform position by ModelView matrix */
 228       TRANSFORM_POINT(temp, ctx->ModelviewMatrixStack.Top->m, params);
 229       params = temp;
 230       break;
 231    case GL_SPOT_DIRECTION:
 232       /* transform direction by inverse modelview */
 233       if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
 234          _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
 235       }
 236       TRANSFORM_DIRECTION(temp, params, ctx->ModelviewMatrixStack.Top->m);
 237       params = temp;
 238       break;
 239    case GL_SPOT_EXPONENT:
 240       if (params[0] < 0.0 || params[0] > ctx->Const.MaxSpotExponent) {
 241          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 242          return;
 243       }
 244       break;
 245    case GL_SPOT_CUTOFF:
 246       if ((params[0] < 0.0 || params[0] > 90.0) && params[0] != 180.0) {
 247          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 248          return;
 249       }
 250       break;
 251    case GL_CONSTANT_ATTENUATION:
 252       if (params[0] < 0.0) {
 253          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 254          return;
 255       }
 256       break;
 257    case GL_LINEAR_ATTENUATION:
 258       if (params[0] < 0.0) {
 259          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 260          return;
 261       }
 262       break;
 263    case GL_QUADRATIC_ATTENUATION:
 264       if (params[0] < 0.0) {
 265          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 266          return;
 267       }
 268       break;
 269    default:
 270       _mesa_error(ctx, GL_INVALID_ENUM, "glLight(pname=0x%x)", pname);
 271       return;
 272    }
 273
 274    _mesa_light(ctx, i, pname, params);
 275 }
 276
 277
 278 void GLAPIENTRY
 279 _mesa_Lighti( GLenum light, GLenum pname, GLint param )
 280 {
 281    GLint iparam[4];
 282    iparam[0] = param;
 283    iparam[1] = iparam[2] = iparam[3] = 0;
 284    _mesa_Lightiv( light, pname, iparam );
 285 }
 286
 287
 288 void GLAPIENTRY
 289 _mesa_Lightiv( GLenum light, GLenum pname, const GLint *params )
 290 {
 291    GLfloat fparam[4];
 292
 293    switch (pname) {
 294       case GL_AMBIENT:
 295       case GL_DIFFUSE:
 296       case GL_SPECULAR:
 297          fparam[0] = INT_TO_FLOAT( params[0] );
 298          fparam[1] = INT_TO_FLOAT( params[1] );
 299          fparam[2] = INT_TO_FLOAT( params[2] );
 300          fparam[3] = INT_TO_FLOAT( params[3] );
 301          break;
 302       case GL_POSITION:
 303          fparam[0] = (GLfloat) params[0];
 304          fparam[1] = (GLfloat) params[1];
 305          fparam[2] = (GLfloat) params[2];
 306          fparam[3] = (GLfloat) params[3];
 307          break;
 308       case GL_SPOT_DIRECTION:
 309          fparam[0] = (GLfloat) params[0];
 310          fparam[1] = (GLfloat) params[1];
 311          fparam[2] = (GLfloat) params[2];
 312          break;
 313       case GL_SPOT_EXPONENT:
 314       case GL_SPOT_CUTOFF:
 315       case GL_CONSTANT_ATTENUATION:
 316       case GL_LINEAR_ATTENUATION:
 317       case GL_QUADRATIC_ATTENUATION:
 318          fparam[0] = (GLfloat) params[0];
 319          break;
 320       default:
 321          /* error will be caught later in gl_Lightfv */
 322          ;
 323    }
 324
 325    _mesa_Lightfv( light, pname, fparam );
 326 }
 327
 328
 329
 330 void GLAPIENTRY
 331 _mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params )
 332 {
 333    GET_CURRENT_CONTEXT(ctx);
 334    GLint l = (GLint) (light - GL_LIGHT0);
 335
 336    if (l < 0 || l >= (GLint) ctx->Const.MaxLights) {
 337       _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightfv" );
 338       return;
 339    }
 340
 341    switch (pname) {
 342       case GL_AMBIENT:
 343          COPY_4V( params, ctx->Light.Light[l].Ambient );
 344          break;
 345       case GL_DIFFUSE:
 346          COPY_4V( params, ctx->Light.Light[l].Diffuse );
 347          break;
 348       case GL_SPECULAR:
 349          COPY_4V( params, ctx->Light.Light[l].Specular );
 350          break;
 351       case GL_POSITION:
 352          COPY_4V( params, ctx->Light.Light[l].EyePosition );
 353          break;
 354       case GL_SPOT_DIRECTION:
 355          COPY_3V( params, ctx->Light.Light[l].SpotDirection );
 356          break;
 357       case GL_SPOT_EXPONENT:
 358          params[0] = ctx->Light.Light[l].SpotExponent;
 359          break;
 360       case GL_SPOT_CUTOFF:
 361          params[0] = ctx->Light.Light[l].SpotCutoff;
 362          break;
 363       case GL_CONSTANT_ATTENUATION:
 364          params[0] = ctx->Light.Light[l].ConstantAttenuation;
 365          break;
 366       case GL_LINEAR_ATTENUATION:
 367          params[0] = ctx->Light.Light[l].LinearAttenuation;
 368          break;
 369       case GL_QUADRATIC_ATTENUATION:
 370          params[0] = ctx->Light.Light[l].QuadraticAttenuation;
 371          break;
 372       default:
 373          _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightfv" );
 374          break;
 375    }
 376 }
 377
 378
 379 void GLAPIENTRY
 380 _mesa_GetLightiv( GLenum light, GLenum pname, GLint *params )
 381 {
 382    GET_CURRENT_CONTEXT(ctx);
 383    GLint l = (GLint) (light - GL_LIGHT0);
 384
 385    if (l < 0 || l >= (GLint) ctx->Const.MaxLights) {
 386       _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightiv" );
 387       return;
 388    }
 389
 390    switch (pname) {
 391       case GL_AMBIENT:
 392          params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[0]);
 393          params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[1]);
 394          params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[2]);
 395          params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[3]);
 396          break;
 397       case GL_DIFFUSE:
 398          params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[0]);
 399          params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[1]);
 400          params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[2]);
 401          params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[3]);
 402          break;
 403       case GL_SPECULAR:
 404          params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[0]);
 405          params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[1]);
 406          params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[2]);
 407          params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[3]);
 408          break;
 409       case GL_POSITION:
 410          params[0] = (GLint) ctx->Light.Light[l].EyePosition[0];
 411          params[1] = (GLint) ctx->Light.Light[l].EyePosition[1];
 412          params[2] = (GLint) ctx->Light.Light[l].EyePosition[2];
 413          params[3] = (GLint) ctx->Light.Light[l].EyePosition[3];
 414          break;
 415       case GL_SPOT_DIRECTION:
 416          params[0] = (GLint) ctx->Light.Light[l].SpotDirection[0];
 417          params[1] = (GLint) ctx->Light.Light[l].SpotDirection[1];
 418          params[2] = (GLint) ctx->Light.Light[l].SpotDirection[2];
 419          break;
 420       case GL_SPOT_EXPONENT:
 421          params[0] = (GLint) ctx->Light.Light[l].SpotExponent;
 422          break;
 423       case GL_SPOT_CUTOFF:
 424          params[0] = (GLint) ctx->Light.Light[l].SpotCutoff;
 425          break;
 426       case GL_CONSTANT_ATTENUATION:
 427          params[0] = (GLint) ctx->Light.Light[l].ConstantAttenuation;
 428          break;
 429       case GL_LINEAR_ATTENUATION:
 430          params[0] = (GLint) ctx->Light.Light[l].LinearAttenuation;
 431          break;
 432       case GL_QUADRATIC_ATTENUATION:
 433          params[0] = (GLint) ctx->Light.Light[l].QuadraticAttenuation;
 434          break;
 435       default:
 436          _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightiv" );
 437          break;
 438    }
 439 }
 440
 441
 442
 443 /**********************************************************************/
 444 /***                        Light Model                             ***/
 445 /**********************************************************************/
 446
 447
 448 void GLAPIENTRY
 449 _mesa_LightModelfv( GLenum pname, const GLfloat *params )
 450 {
 451    GLenum newenum;
 452    GLboolean newbool;
 453    GET_CURRENT_CONTEXT(ctx);
 454
 455    switch (pname) {
 456       case GL_LIGHT_MODEL_AMBIENT:
 457          if (TEST_EQ_4V( ctx->Light.Model.Ambient, params ))
 458             return;
 459          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 460          COPY_4V( ctx->Light.Model.Ambient, params );
 461          break;
 462       case GL_LIGHT_MODEL_LOCAL_VIEWER:
 463          if (ctx->API != API_OPENGL_COMPAT)
 464             goto invalid_pname;
 465          newbool = (params[0]!=0.0);
 466          if (ctx->Light.Model.LocalViewer == newbool)
 467             return;
 468          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 469          ctx->Light.Model.LocalViewer = newbool;
 470          break;
 471       case GL_LIGHT_MODEL_TWO_SIDE:
 472          newbool = (params[0]!=0.0);
 473          if (ctx->Light.Model.TwoSide == newbool)
 474             return;
 475          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 476          ctx->Light.Model.TwoSide = newbool;
 477          break;
 478       case GL_LIGHT_MODEL_COLOR_CONTROL:
 479          if (ctx->API != API_OPENGL_COMPAT)
 480             goto invalid_pname;
 481          if (params[0] == (GLfloat) GL_SINGLE_COLOR)
 482             newenum = GL_SINGLE_COLOR;
 483          else if (params[0] == (GLfloat) GL_SEPARATE_SPECULAR_COLOR)
 484             newenum = GL_SEPARATE_SPECULAR_COLOR;
 485          else {
 486             _mesa_error( ctx, GL_INVALID_ENUM, "glLightModel(param=0x0%x)",
 487                          (GLint) params[0] );
 488             return;
 489          }
 490          if (ctx->Light.Model.ColorControl == newenum)
 491             return;
 492          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 493          ctx->Light.Model.ColorControl = newenum;
 494          break;
 495       default:
 496          goto invalid_pname;
 497    }
 498
 499    if (ctx->Driver.LightModelfv)
 500       ctx->Driver.LightModelfv( ctx, pname, params );
 501
 502    return;
 503
 504 invalid_pname:
 505    _mesa_error( ctx, GL_INVALID_ENUM, "glLightModel(pname=0x%x)", pname );
 506    return;
 507 }
 508
 509
 510 void GLAPIENTRY
 511 _mesa_LightModeliv( GLenum pname, const GLint *params )
 512 {
 513    GLfloat fparam[4];
 514
 515    switch (pname) {
 516       case GL_LIGHT_MODEL_AMBIENT:
 517          fparam[0] = INT_TO_FLOAT( params[0] );
 518          fparam[1] = INT_TO_FLOAT( params[1] );
 519          fparam[2] = INT_TO_FLOAT( params[2] );
 520          fparam[3] = INT_TO_FLOAT( params[3] );
 521          break;
 522       case GL_LIGHT_MODEL_LOCAL_VIEWER:
 523       case GL_LIGHT_MODEL_TWO_SIDE:
 524       case GL_LIGHT_MODEL_COLOR_CONTROL:
 525          fparam[0] = (GLfloat) params[0];
 526          break;
 527       default:
 528          /* Error will be caught later in gl_LightModelfv */
 529          ASSIGN_4V(fparam, 0.0F, 0.0F, 0.0F, 0.0F);
 530    }
 531    _mesa_LightModelfv( pname, fparam );
 532 }
 533
 534
 535 void GLAPIENTRY
 536 _mesa_LightModeli( GLenum pname, GLint param )
 537 {
 538    GLint iparam[4];
 539    iparam[0] = param;
 540    iparam[1] = iparam[2] = iparam[3] = 0;
 541    _mesa_LightModeliv( pname, iparam );
 542 }
 543
 544
 545 void GLAPIENTRY
 546 _mesa_LightModelf( GLenum pname, GLfloat param )
 547 {
 548    GLfloat fparam[4];
 549    fparam[0] = param;
 550    fparam[1] = fparam[2] = fparam[3] = 0.0F;
 551    _mesa_LightModelfv( pname, fparam );
 552 }
 553
 554
 555
 556 /********** MATERIAL **********/
 557
 558
 559 /*
 560  * Given a face and pname value (ala glColorMaterial), compute a bitmask
 561  * of the targeted material values.
 562  */
 563 GLuint
 564 _mesa_material_bitmask( struct gl_context *ctx, GLenum face, GLenum pname,
 565                         GLuint legal, const char *where )
 566 {
 567    GLuint bitmask = 0;
 568
 569    /* Make a bitmask indicating what material attribute(s) we're updating */
 570    switch (pname) {
 571       case GL_EMISSION:
 572          bitmask |= MAT_BIT_FRONT_EMISSION | MAT_BIT_BACK_EMISSION;
 573          break;
 574       case GL_AMBIENT:
 575          bitmask |= MAT_BIT_FRONT_AMBIENT | MAT_BIT_BACK_AMBIENT;
 576          break;
 577       case GL_DIFFUSE:
 578          bitmask |= MAT_BIT_FRONT_DIFFUSE | MAT_BIT_BACK_DIFFUSE;
 579          break;
 580       case GL_SPECULAR:
 581          bitmask |= MAT_BIT_FRONT_SPECULAR | MAT_BIT_BACK_SPECULAR;
 582          break;
 583       case GL_SHININESS:
 584          bitmask |= MAT_BIT_FRONT_SHININESS | MAT_BIT_BACK_SHININESS;
 585          break;
 586       case GL_AMBIENT_AND_DIFFUSE:
 587          bitmask |= MAT_BIT_FRONT_AMBIENT | MAT_BIT_BACK_AMBIENT;
 588          bitmask |= MAT_BIT_FRONT_DIFFUSE | MAT_BIT_BACK_DIFFUSE;
 589          break;
 590       case GL_COLOR_INDEXES:
 591          bitmask |= MAT_BIT_FRONT_INDEXES  | MAT_BIT_BACK_INDEXES;
 592          break;
 593       default:
 594          _mesa_error( ctx, GL_INVALID_ENUM, "%s", where );
 595          return 0;
 596    }
 597
 598    if (face==GL_FRONT) {
 599       bitmask &= FRONT_MATERIAL_BITS;
 600    }
 601    else if (face==GL_BACK) {
 602       bitmask &= BACK_MATERIAL_BITS;
 603    }
 604    else if (face != GL_FRONT_AND_BACK) {
 605       _mesa_error( ctx, GL_INVALID_ENUM, "%s", where );
 606       return 0;
 607    }
 608
 609    if (bitmask & ~legal) {
 610       _mesa_error( ctx, GL_INVALID_ENUM, "%s", where );
 611       return 0;
 612    }
 613
 614    return bitmask;
 615 }
 616
 617
 618
 619 /* Update derived values following a change in ctx->Light.Material
 620  */
 621 void
 622 _mesa_update_material( struct gl_context *ctx, GLuint bitmask )
 623 {
 624    struct gl_light *light, *list = &ctx->Light.EnabledList;
 625    GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
 626
 627    if (MESA_VERBOSE & VERBOSE_MATERIAL)
 628       _mesa_debug(ctx, "_mesa_update_material, mask 0x%x\n", bitmask);
 629
 630    if (!bitmask)
 631       return;
 632
 633    /* update material ambience */
 634    if (bitmask & MAT_BIT_FRONT_AMBIENT) {
 635       foreach (light, list) {
 636          SCALE_3V( light->_MatAmbient[0], light->Ambient,
 637                    mat[MAT_ATTRIB_FRONT_AMBIENT]);
 638       }
 639    }
 640
 641    if (bitmask & MAT_BIT_BACK_AMBIENT) {
 642       foreach (light, list) {
 643          SCALE_3V( light->_MatAmbient[1], light->Ambient,
 644                    mat[MAT_ATTRIB_BACK_AMBIENT]);
 645       }
 646    }
 647
 648    /* update BaseColor = emission + scene's ambience * material's ambience */
 649    if (bitmask & (MAT_BIT_FRONT_EMISSION | MAT_BIT_FRONT_AMBIENT)) {
 650       COPY_3V( ctx->Light._BaseColor[0], mat[MAT_ATTRIB_FRONT_EMISSION] );
 651       ACC_SCALE_3V( ctx->Light._BaseColor[0], mat[MAT_ATTRIB_FRONT_AMBIENT],
 652                     ctx->Light.Model.Ambient );
 653    }
 654
 655    if (bitmask & (MAT_BIT_BACK_EMISSION | MAT_BIT_BACK_AMBIENT)) {
 656       COPY_3V( ctx->Light._BaseColor[1], mat[MAT_ATTRIB_BACK_EMISSION] );
 657       ACC_SCALE_3V( ctx->Light._BaseColor[1], mat[MAT_ATTRIB_BACK_AMBIENT],
 658                     ctx->Light.Model.Ambient );
 659    }
 660
 661    /* update material diffuse values */
 662    if (bitmask & MAT_BIT_FRONT_DIFFUSE) {
 663       foreach (light, list) {
 664          SCALE_3V( light->_MatDiffuse[0], light->Diffuse,
 665                    mat[MAT_ATTRIB_FRONT_DIFFUSE] );
 666       }
 667    }
 668
 669    if (bitmask & MAT_BIT_BACK_DIFFUSE) {
 670       foreach (light, list) {
 671          SCALE_3V( light->_MatDiffuse[1], light->Diffuse,
 672                    mat[MAT_ATTRIB_BACK_DIFFUSE] );
 673       }
 674    }
 675
 676    /* update material specular values */
 677    if (bitmask & MAT_BIT_FRONT_SPECULAR) {
 678       foreach (light, list) {
 679          SCALE_3V( light->_MatSpecular[0], light->Specular,
 680                    mat[MAT_ATTRIB_FRONT_SPECULAR]);
 681       }
 682    }
 683
 684    if (bitmask & MAT_BIT_BACK_SPECULAR) {
 685       foreach (light, list) {
 686          SCALE_3V( light->_MatSpecular[1], light->Specular,
 687                    mat[MAT_ATTRIB_BACK_SPECULAR]);
 688       }
 689    }
 690 }
 691
 692
 693 /*
 694  * Update the current materials from the given rgba color
 695  * according to the bitmask in _ColorMaterialBitmask, which is
 696  * set by glColorMaterial().
 697  */
 698 void
 699 _mesa_update_color_material( struct gl_context *ctx, const GLfloat color[4] )
 700 {
 701    const GLbitfield bitmask = ctx->Light._ColorMaterialBitmask;
 702    struct gl_material *mat = &ctx->Light.Material;
 703    int i;
 704
 705    for (i = 0 ; i < MAT_ATTRIB_MAX ; i++)
 706       if (bitmask & (1<<i))
 707          COPY_4FV( mat->Attrib[i], color );
 708
 709    _mesa_update_material( ctx, bitmask );
 710 }
 711
 712
 713 void GLAPIENTRY
 714 _mesa_ColorMaterial( GLenum face, GLenum mode )
 715 {
 716    GET_CURRENT_CONTEXT(ctx);
 717    GLuint bitmask;
 718    GLuint legal = (MAT_BIT_FRONT_EMISSION | MAT_BIT_BACK_EMISSION |
 719                    MAT_BIT_FRONT_SPECULAR | MAT_BIT_BACK_SPECULAR |
 720                    MAT_BIT_FRONT_DIFFUSE  | MAT_BIT_BACK_DIFFUSE  |
 721                    MAT_BIT_FRONT_AMBIENT  | MAT_BIT_BACK_AMBIENT);
 722
 723    if (MESA_VERBOSE&VERBOSE_API)
 724       _mesa_debug(ctx, "glColorMaterial %s %s\n",
 725                   _mesa_lookup_enum_by_nr(face),
 726                   _mesa_lookup_enum_by_nr(mode));
 727
 728    bitmask = _mesa_material_bitmask(ctx, face, mode, legal, "glColorMaterial");
 729    if (bitmask == 0)
 730       return; /* error was recorded */
 731
 732    if (ctx->Light._ColorMaterialBitmask == bitmask &&
 733        ctx->Light.ColorMaterialFace == face &&
 734        ctx->Light.ColorMaterialMode == mode)
 735       return;
 736
 737    FLUSH_VERTICES(ctx, _NEW_LIGHT);
 738    ctx->Light._ColorMaterialBitmask = bitmask;
 739    ctx->Light.ColorMaterialFace = face;
 740    ctx->Light.ColorMaterialMode = mode;
 741
 742    if (ctx->Light.ColorMaterialEnabled) {
 743       FLUSH_CURRENT( ctx, 0 );
 744       _mesa_update_color_material(ctx,ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
 745    }
 746
 747    if (ctx->Driver.ColorMaterial)
 748       ctx->Driver.ColorMaterial( ctx, face, mode );
 749 }
 750
 751
 752 void GLAPIENTRY
 753 _mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params )
 754 {
 755    GET_CURRENT_CONTEXT(ctx);
 756    GLuint f;
 757    GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
 758    FLUSH_VERTICES(ctx, 0); /* update materials */
 759
 760    FLUSH_CURRENT(ctx, 0); /* update ctx->Light.Material from vertex buffer */
 761
 762    if (face==GL_FRONT) {
 763       f = 0;
 764    }
 765    else if (face==GL_BACK) {
 766       f = 1;
 767    }
 768    else {
 769       _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(face)" );
 770       return;
 771    }
 772
 773    switch (pname) {
 774       case GL_AMBIENT:
 775          COPY_4FV( params, mat[MAT_ATTRIB_AMBIENT(f)] );
 776          break;
 777       case GL_DIFFUSE:
 778          COPY_4FV( params, mat[MAT_ATTRIB_DIFFUSE(f)] );
 779          break;
 780       case GL_SPECULAR:
 781          COPY_4FV( params, mat[MAT_ATTRIB_SPECULAR(f)] );
 782          break;
 783       case GL_EMISSION:
 784          COPY_4FV( params, mat[MAT_ATTRIB_EMISSION(f)] );
 785          break;
 786       case GL_SHININESS:
 787          *params = mat[MAT_ATTRIB_SHININESS(f)][0];
 788          break;
 789       case GL_COLOR_INDEXES:
 790          if (ctx->API != API_OPENGL_COMPAT) {
 791             _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(pname)" );
 792             return;
 793          }
 794          params[0] = mat[MAT_ATTRIB_INDEXES(f)][0];
 795          params[1] = mat[MAT_ATTRIB_INDEXES(f)][1];
 796          params[2] = mat[MAT_ATTRIB_INDEXES(f)][2];
 797          break;
 798       default:
 799          _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(pname)" );
 800    }
 801 }
 802
 803
 804 void GLAPIENTRY
 805 _mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params )
 806 {
 807    GET_CURRENT_CONTEXT(ctx);
 808    GLuint f;
 809    GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
 810
 811    ASSERT(ctx->API == API_OPENGL_COMPAT);
 812
 813    FLUSH_VERTICES(ctx, 0); /* update materials */
 814    FLUSH_CURRENT(ctx, 0); /* update ctx->Light.Material from vertex buffer */
 815
 816    if (face==GL_FRONT) {
 817       f = 0;
 818    }
 819    else if (face==GL_BACK) {
 820       f = 1;
 821    }
 822    else {
 823       _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialiv(face)" );
 824       return;
 825    }
 826    switch (pname) {
 827       case GL_AMBIENT:
 828          params[0] = FLOAT_TO_INT( mat[MAT_ATTRIB_AMBIENT(f)][0] );
 829          params[1] = FLOAT_TO_INT( mat[MAT_ATTRIB_AMBIENT(f)][1] );
 830          params[2] = FLOAT_TO_INT( mat[MAT_ATTRIB_AMBIENT(f)][2] );
 831          params[3] = FLOAT_TO_INT( mat[MAT_ATTRIB_AMBIENT(f)][3] );
 832          break;
 833       case GL_DIFFUSE:
 834          params[0] = FLOAT_TO_INT( mat[MAT_ATTRIB_DIFFUSE(f)][0] );
 835          params[1] = FLOAT_TO_INT( mat[MAT_ATTRIB_DIFFUSE(f)][1] );
 836          params[2] = FLOAT_TO_INT( mat[MAT_ATTRIB_DIFFUSE(f)][2] );
 837          params[3] = FLOAT_TO_INT( mat[MAT_ATTRIB_DIFFUSE(f)][3] );
 838          break;
 839       case GL_SPECULAR:
 840          params[0] = FLOAT_TO_INT( mat[MAT_ATTRIB_SPECULAR(f)][0] );
 841          params[1] = FLOAT_TO_INT( mat[MAT_ATTRIB_SPECULAR(f)][1] );
 842          params[2] = FLOAT_TO_INT( mat[MAT_ATTRIB_SPECULAR(f)][2] );
 843          params[3] = FLOAT_TO_INT( mat[MAT_ATTRIB_SPECULAR(f)][3] );
 844          break;
 845       case GL_EMISSION:
 846          params[0] = FLOAT_TO_INT( mat[MAT_ATTRIB_EMISSION(f)][0] );
 847          params[1] = FLOAT_TO_INT( mat[MAT_ATTRIB_EMISSION(f)][1] );
 848          params[2] = FLOAT_TO_INT( mat[MAT_ATTRIB_EMISSION(f)][2] );
 849          params[3] = FLOAT_TO_INT( mat[MAT_ATTRIB_EMISSION(f)][3] );
 850          break;
 851       case GL_SHININESS:
 852          *params = IROUND( mat[MAT_ATTRIB_SHININESS(f)][0] );
 853          break;
 854       case GL_COLOR_INDEXES:
 855          params[0] = IROUND( mat[MAT_ATTRIB_INDEXES(f)][0] );
 856          params[1] = IROUND( mat[MAT_ATTRIB_INDEXES(f)][1] );
 857          params[2] = IROUND( mat[MAT_ATTRIB_INDEXES(f)][2] );
 858          break;
 859       default:
 860          _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(pname)" );
 861    }
 862 }
 863
 864
 865
 866 /**
 867  * Examine current lighting parameters to determine if the optimized lighting
 868  * function can be used.
 869  * Also, precompute some lighting values such as the products of light
 870  * source and material ambient, diffuse and specular coefficients.
 871  */
 872 void
 873 _mesa_update_lighting( struct gl_context *ctx )
 874 {
 875    GLbitfield flags = 0;
 876    struct gl_light *light;
 877    ctx->Light._NeedEyeCoords = GL_FALSE;
 878
 879    if (!ctx->Light.Enabled)
 880       return;
 881
 882    foreach(light, &ctx->Light.EnabledList) {
 883       flags |= light->_Flags;
 884    }
 885
 886    ctx->Light._NeedVertices =
 887       ((flags & (LIGHT_POSITIONAL|LIGHT_SPOT)) ||
 888        ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ||
 889        ctx->Light.Model.LocalViewer);
 890
 891    ctx->Light._NeedEyeCoords = ((flags & LIGHT_POSITIONAL) ||
 892                                 ctx->Light.Model.LocalViewer);
 893
 894    /* XXX: This test is overkill & needs to be fixed both for software and
 895     * hardware t&l drivers.  The above should be sufficient & should
 896     * be tested to verify this.
 897     */
 898    if (ctx->Light._NeedVertices)
 899       ctx->Light._NeedEyeCoords = GL_TRUE;
 900
 901    /* Precompute some shading values.  Although we reference
 902     * Light.Material here, we can get away without flushing
 903     * FLUSH_UPDATE_CURRENT, as when any outstanding material changes
 904     * are flushed, they will update the derived state at that time.
 905     */
 906    if (ctx->Light.Model.TwoSide)
 907       _mesa_update_material(ctx,
 908                             MAT_BIT_FRONT_EMISSION |
 909                             MAT_BIT_FRONT_AMBIENT |
 910                             MAT_BIT_FRONT_DIFFUSE |
 911                             MAT_BIT_FRONT_SPECULAR |
 912                             MAT_BIT_BACK_EMISSION |
 913                             MAT_BIT_BACK_AMBIENT |
 914                             MAT_BIT_BACK_DIFFUSE |
 915                             MAT_BIT_BACK_SPECULAR);
 916    else
 917       _mesa_update_material(ctx,
 918                             MAT_BIT_FRONT_EMISSION |
 919                             MAT_BIT_FRONT_AMBIENT |
 920                             MAT_BIT_FRONT_DIFFUSE |
 921                             MAT_BIT_FRONT_SPECULAR);
 922 }
 923
 924
 925 /**
 926  * Update state derived from light position, spot direction.
 927  * Called upon:
 928  *   _NEW_MODELVIEW
 929  *   _NEW_LIGHT
 930  *   _TNL_NEW_NEED_EYE_COORDS
 931  *
 932  * Update on (_NEW_MODELVIEW | _NEW_LIGHT) when lighting is enabled.
 933  * Also update on lighting space changes.
 934  */
 935 static void
 936 compute_light_positions( struct gl_context *ctx )
 937 {
 938    struct gl_light *light;
 939    static const GLfloat eye_z[3] = { 0, 0, 1 };
 940
 941    if (!ctx->Light.Enabled)
 942       return;
 943
 944    if (ctx->_NeedEyeCoords) {
 945       COPY_3V( ctx->_EyeZDir, eye_z );
 946    }
 947    else {
 948       TRANSFORM_NORMAL( ctx->_EyeZDir, eye_z, ctx->ModelviewMatrixStack.Top->m );
 949    }
 950
 951    foreach (light, &ctx->Light.EnabledList) {
 952
 953       if (ctx->_NeedEyeCoords) {
 954          /* _Position is in eye coordinate space */
 955          COPY_4FV( light->_Position, light->EyePosition );
 956       }
 957       else {
 958          /* _Position is in object coordinate space */
 959          TRANSFORM_POINT( light->_Position, ctx->ModelviewMatrixStack.Top->inv,
 960                           light->EyePosition );
 961       }
 962
 963       if (!(light->_Flags & LIGHT_POSITIONAL)) {
 964          /* VP (VP) = Normalize( Position ) */
 965          COPY_3V( light->_VP_inf_norm, light->_Position );
 966          NORMALIZE_3FV( light->_VP_inf_norm );
 967
 968          if (!ctx->Light.Model.LocalViewer) {
 969             /* _h_inf_norm = Normalize( V_to_P + <0,0,1> ) */
 970             ADD_3V( light->_h_inf_norm, light->_VP_inf_norm, ctx->_EyeZDir);
 971             NORMALIZE_3FV( light->_h_inf_norm );
 972          }
 973          light->_VP_inf_spot_attenuation = 1.0;
 974       }
 975       else {
 976          /* positional light w/ homogeneous coordinate, divide by W */
 977          GLfloat wInv = (GLfloat)1.0 / light->_Position[3];
 978          light->_Position[0] *= wInv;
 979          light->_Position[1] *= wInv;
 980          light->_Position[2] *= wInv;
 981       }
 982
 983       if (light->_Flags & LIGHT_SPOT) {
 984          /* Note: we normalize the spot direction now */
 985
 986          if (ctx->_NeedEyeCoords) {
 987             COPY_3V( light->_NormSpotDirection, light->SpotDirection );
 988             NORMALIZE_3FV( light->_NormSpotDirection );
 989          }
 990          else {
 991             GLfloat spotDir[3];
 992             COPY_3V(spotDir, light->SpotDirection);
 993             NORMALIZE_3FV(spotDir);
 994             TRANSFORM_NORMAL( light->_NormSpotDirection,
 995                               spotDir,
 996                               ctx->ModelviewMatrixStack.Top->m);
 997          }
 998
 999          NORMALIZE_3FV( light->_NormSpotDirection );
1000
1001          if (!(light->_Flags & LIGHT_POSITIONAL)) {
1002             GLfloat PV_dot_dir = - DOT3(light->_VP_inf_norm,
1003                                         light->_NormSpotDirection);
1004
1005             if (PV_dot_dir > light->_CosCutoff) {
1006                light->_VP_inf_spot_attenuation =
1007                   powf(PV_dot_dir, light->SpotExponent);
1008             }
1009             else {
1010                light->_VP_inf_spot_attenuation = 0;
1011             }
1012          }
1013       }
1014    }
1015 }
1016
1017
1018
1019 static void
1020 update_modelview_scale( struct gl_context *ctx )
1021 {
1022    ctx->_ModelViewInvScale = 1.0F;
1023    if (!_math_matrix_is_length_preserving(ctx->ModelviewMatrixStack.Top)) {
1024       const GLfloat *m = ctx->ModelviewMatrixStack.Top->inv;
1025       GLfloat f = m[2] * m[2] + m[6] * m[6] + m[10] * m[10];
1026       if (f < 1e-12) f = 1.0;
1027       if (ctx->_NeedEyeCoords)
1028          ctx->_ModelViewInvScale = (GLfloat) INV_SQRTF(f);
1029       else
1030          ctx->_ModelViewInvScale = (GLfloat) sqrtf(f);
1031    }
1032 }
1033
1034
1035 /**
1036  * Bring up to date any state that relies on _NeedEyeCoords.
1037  */
1038 void
1039 _mesa_update_tnl_spaces( struct gl_context *ctx, GLuint new_state )
1040 {
1041    const GLuint oldneedeyecoords = ctx->_NeedEyeCoords;
1042
1043    (void) new_state;
1044    ctx->_NeedEyeCoords = GL_FALSE;
1045
1046    if (ctx->_ForceEyeCoords ||
1047        (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD) ||
1048        ctx->Point._Attenuated ||
1049        ctx->Light._NeedEyeCoords)
1050       ctx->_NeedEyeCoords = GL_TRUE;
1051
1052    if (ctx->Light.Enabled &&
1053        !_math_matrix_is_length_preserving(ctx->ModelviewMatrixStack.Top))
1054       ctx->_NeedEyeCoords = GL_TRUE;
1055
1056    /* Check if the truth-value interpretations of the bitfields have
1057     * changed:
1058     */
1059    if (oldneedeyecoords != ctx->_NeedEyeCoords) {
1060       /* Recalculate all state that depends on _NeedEyeCoords.
1061        */
1062       update_modelview_scale(ctx);
1063       compute_light_positions( ctx );
1064
1065       if (ctx->Driver.LightingSpaceChange)
1066          ctx->Driver.LightingSpaceChange( ctx );
1067    }
1068    else {
1069       GLuint new_state2 = ctx->NewState;
1070
1071       /* Recalculate that same state only if it has been invalidated
1072        * by other statechanges.
1073        */
1074       if (new_state2 & _NEW_MODELVIEW)
1075          update_modelview_scale(ctx);
1076
1077       if (new_state2 & (_NEW_LIGHT|_NEW_MODELVIEW))
1078          compute_light_positions( ctx );
1079    }
1080 }
1081
1082
1083 /**
1084  * Drivers may need this if the hardware tnl unit doesn't support the
1085  * light-in-modelspace optimization.  It's also useful for debugging.
1086  */
1087 void
1088 _mesa_allow_light_in_model( struct gl_context *ctx, GLboolean flag )
1089 {
1090    ctx->_ForceEyeCoords = !flag;
1091    ctx->NewState |= _NEW_POINT; /* one of the bits from
1092                                  * _MESA_NEW_NEED_EYE_COORDS.
1093                                  */
1094 }
1095
1096
1097
1098 /**********************************************************************/
1099 /*****                      Initialization                        *****/
1100 /**********************************************************************/
1101
1102 /**
1103  * Initialize the n-th light data structure.
1104  *
1105  * \param l pointer to the gl_light structure to be initialized.
1106  * \param n number of the light.
1107  * \note The defaults for light 0 are different than the other lights.
1108  */
1109 static void
1110 init_light( struct gl_light *l, GLuint n )
1111 {
1112    make_empty_list( l );
1113
1114    ASSIGN_4V( l->Ambient, 0.0, 0.0, 0.0, 1.0 );
1115    if (n==0) {
1116       ASSIGN_4V( l->Diffuse, 1.0, 1.0, 1.0, 1.0 );
1117       ASSIGN_4V( l->Specular, 1.0, 1.0, 1.0, 1.0 );
1118    }
1119    else {
1120       ASSIGN_4V( l->Diffuse, 0.0, 0.0, 0.0, 1.0 );
1121       ASSIGN_4V( l->Specular, 0.0, 0.0, 0.0, 1.0 );
1122    }
1123    ASSIGN_4V( l->EyePosition, 0.0, 0.0, 1.0, 0.0 );
1124    ASSIGN_3V( l->SpotDirection, 0.0, 0.0, -1.0 );
1125    l->SpotExponent = 0.0;
1126    l->SpotCutoff = 180.0;
1127    l->_CosCutoff = 0.0;         /* KW: -ve values not admitted */
1128    l->ConstantAttenuation = 1.0;
1129    l->LinearAttenuation = 0.0;
1130    l->QuadraticAttenuation = 0.0;
1131    l->Enabled = GL_FALSE;
1132 }
1133
1134
1135 /**
1136  * Initialize the light model data structure.
1137  *
1138  * \param lm pointer to the gl_lightmodel structure to be initialized.
1139  */
1140 static void
1141 init_lightmodel( struct gl_lightmodel *lm )
1142 {
1143    ASSIGN_4V( lm->Ambient, 0.2F, 0.2F, 0.2F, 1.0F );
1144    lm->LocalViewer = GL_FALSE;
1145    lm->TwoSide = GL_FALSE;
1146    lm->ColorControl = GL_SINGLE_COLOR;
1147 }
1148
1149
1150 /**
1151  * Initialize the material data structure.
1152  *
1153  * \param m pointer to the gl_material structure to be initialized.
1154  */
1155 static void
1156 init_material( struct gl_material *m )
1157 {
1158    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_AMBIENT],  0.2F, 0.2F, 0.2F, 1.0F );
1159    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_DIFFUSE],  0.8F, 0.8F, 0.8F, 1.0F );
1160    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_SPECULAR], 0.0F, 0.0F, 0.0F, 1.0F );
1161    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_EMISSION], 0.0F, 0.0F, 0.0F, 1.0F );
1162    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_SHININESS], 0.0F, 0.0F, 0.0F, 0.0F );
1163    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_INDEXES], 0.0F, 1.0F, 1.0F, 0.0F );
1164
1165    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_AMBIENT],  0.2F, 0.2F, 0.2F, 1.0F );
1166    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_DIFFUSE],  0.8F, 0.8F, 0.8F, 1.0F );
1167    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_SPECULAR], 0.0F, 0.0F, 0.0F, 1.0F );
1168    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_EMISSION], 0.0F, 0.0F, 0.0F, 1.0F );
1169    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_SHININESS], 0.0F, 0.0F, 0.0F, 0.0F );
1170    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_INDEXES], 0.0F, 1.0F, 1.0F, 0.0F );
1171 }
1172
1173
1174 /**
1175  * Initialize all lighting state for the given context.
1176  */
1177 void
1178 _mesa_init_lighting( struct gl_context *ctx )
1179 {
1180    GLuint i;
1181
1182    /* Lighting group */
1183    for (i = 0; i < MAX_LIGHTS; i++) {
1184       init_light( &ctx->Light.Light[i], i );
1185    }
1186    make_empty_list( &ctx->Light.EnabledList );
1187
1188    init_lightmodel( &ctx->Light.Model );
1189    init_material( &ctx->Light.Material );
1190    ctx->Light.ShadeModel = GL_SMOOTH;
1191    ctx->Light.ProvokingVertex = GL_LAST_VERTEX_CONVENTION_EXT;
1192    ctx->Light.Enabled = GL_FALSE;
1193    ctx->Light.ColorMaterialFace = GL_FRONT_AND_BACK;
1194    ctx->Light.ColorMaterialMode = GL_AMBIENT_AND_DIFFUSE;
1195    ctx->Light._ColorMaterialBitmask = _mesa_material_bitmask( ctx,
1196                                                GL_FRONT_AND_BACK,
1197                                                GL_AMBIENT_AND_DIFFUSE, ~0,
1198                                                NULL );
1199
1200    ctx->Light.ColorMaterialEnabled = GL_FALSE;
1201    ctx->Light.ClampVertexColor = ctx->API == API_OPENGL_COMPAT;
1202    ctx->Light._ClampVertexColor = ctx->API == API_OPENGL_COMPAT;
1203
1204    /* Miscellaneous */
1205    ctx->Light._NeedEyeCoords = GL_FALSE;
1206    ctx->_NeedEyeCoords = GL_FALSE;
1207    ctx->_ForceEyeCoords = GL_FALSE;
1208    ctx->_ModelViewInvScale = 1.0;
1209 }
1210
1211
1212 /**
1213  * Deallocate malloc'd lighting state attached to given context.
1214  */
1215 void
1216 _mesa_free_lighting_data( struct gl_context *ctx )
1217 {
1218 }