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 "c99_math.h"
  28 #include "glheader.h"
  29 #include "imports.h"
  30 #include "context.h"
  31 #include "enums.h"
  32 #include "light.h"
  33 #include "macros.h"
  34 #include "util/simple_list.h"
  35 #include "mtypes.h"
  36 #include "math/m_matrix.h"
  37
  38
  39 void GLAPIENTRY
  40 _mesa_ShadeModel( GLenum mode )
  41 {
  42    GET_CURRENT_CONTEXT(ctx);
  43
  44    if (MESA_VERBOSE & VERBOSE_API)
  45       _mesa_debug(ctx, "glShadeModel %s\n", _mesa_lookup_enum_by_nr(mode));
  46
  47    if (mode != GL_FLAT && mode != GL_SMOOTH) {
  48       _mesa_error(ctx, GL_INVALID_ENUM, "glShadeModel");
  49       return;
  50    }
  51
  52    if (ctx->Light.ShadeModel == mode)
  53       return;
  54
  55    FLUSH_VERTICES(ctx, _NEW_LIGHT);
  56    ctx->Light.ShadeModel = mode;
  57
  58    if (ctx->Driver.ShadeModel)
  59       ctx->Driver.ShadeModel( ctx, mode );
  60 }
  61
  62
  63 /**
  64  * Set the provoking vertex (the vertex which specifies the prim's
  65  * color when flat shading) to either the first or last vertex of the
  66  * triangle or line.
  67  */
  68 void GLAPIENTRY
  69 _mesa_ProvokingVertex(GLenum mode)
  70 {
  71    GET_CURRENT_CONTEXT(ctx);
  72
  73    if (MESA_VERBOSE&VERBOSE_API)
  74       _mesa_debug(ctx, "glProvokingVertexEXT 0x%x\n", mode);
  75
  76    switch (mode) {
  77    case GL_FIRST_VERTEX_CONVENTION_EXT:
  78    case GL_LAST_VERTEX_CONVENTION_EXT:
  79       break;
  80    default:
  81       _mesa_error(ctx, GL_INVALID_ENUM, "glProvokingVertexEXT(0x%x)", mode);
  82       return;
  83    }
  84
  85    if (ctx->Light.ProvokingVertex == mode)
  86       return;
  87
  88    FLUSH_VERTICES(ctx, _NEW_LIGHT);
  89    ctx->Light.ProvokingVertex = mode;
  90 }
  91
  92
  93 /**
  94  * Helper function called by _mesa_Lightfv and _mesa_PopAttrib to set
  95  * per-light state.
  96  * For GL_POSITION and GL_SPOT_DIRECTION the params position/direction
  97  * will have already been transformed by the modelview matrix!
  98  * Also, all error checking should have already been done.
  99  */
 100 void
 101 _mesa_light(struct gl_context *ctx, GLuint lnum, GLenum pname, const GLfloat *params)
 102 {
 103    struct gl_light *light;
 104
 105    assert(lnum < MAX_LIGHTS);
 106    light = &ctx->Light.Light[lnum];
 107
 108    switch (pname) {
 109    case GL_AMBIENT:
 110       if (TEST_EQ_4V(light->Ambient, params))
 111          return;
 112       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 113       COPY_4V( light->Ambient, params );
 114       break;
 115    case GL_DIFFUSE:
 116       if (TEST_EQ_4V(light->Diffuse, params))
 117          return;
 118       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 119       COPY_4V( light->Diffuse, params );
 120       break;
 121    case GL_SPECULAR:
 122       if (TEST_EQ_4V(light->Specular, params))
 123          return;
 124       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 125       COPY_4V( light->Specular, params );
 126       break;
 127    case GL_POSITION:
 128       /* NOTE: position has already been transformed by ModelView! */
 129       if (TEST_EQ_4V(light->EyePosition, params))
 130          return;
 131       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 132       COPY_4V(light->EyePosition, params);
 133       if (light->EyePosition[3] != 0.0F)
 134          light->_Flags |= LIGHT_POSITIONAL;
 135       else
 136          light->_Flags &= ~LIGHT_POSITIONAL;
 137       break;
 138    case GL_SPOT_DIRECTION:
 139       /* NOTE: Direction already transformed by inverse ModelView! */
 140       if (TEST_EQ_3V(light->SpotDirection, params))
 141          return;
 142       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 143       COPY_3V(light->SpotDirection, params);
 144       break;
 145    case GL_SPOT_EXPONENT:
 146       assert(params[0] >= 0.0);
 147       assert(params[0] <= ctx->Const.MaxSpotExponent);
 148       if (light->SpotExponent == params[0])
 149          return;
 150       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 151       light->SpotExponent = params[0];
 152       break;
 153    case GL_SPOT_CUTOFF:
 154       assert(params[0] == 180.0 || (params[0] >= 0.0 && params[0] <= 90.0));
 155       if (light->SpotCutoff == params[0])
 156          return;
 157       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 158       light->SpotCutoff = params[0];
 159       light->_CosCutoff = (GLfloat) (cos(light->SpotCutoff * M_PI / 180.0));
 160       if (light->_CosCutoff < 0)
 161          light->_CosCutoff = 0;
 162       if (light->SpotCutoff != 180.0F)
 163          light->_Flags |= LIGHT_SPOT;
 164       else
 165          light->_Flags &= ~LIGHT_SPOT;
 166       break;
 167    case GL_CONSTANT_ATTENUATION:
 168       assert(params[0] >= 0.0);
 169       if (light->ConstantAttenuation == params[0])
 170          return;
 171       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 172       light->ConstantAttenuation = params[0];
 173       break;
 174    case GL_LINEAR_ATTENUATION:
 175       assert(params[0] >= 0.0);
 176       if (light->LinearAttenuation == params[0])
 177          return;
 178       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 179       light->LinearAttenuation = params[0];
 180       break;
 181    case GL_QUADRATIC_ATTENUATION:
 182       assert(params[0] >= 0.0);
 183       if (light->QuadraticAttenuation == params[0])
 184          return;
 185       FLUSH_VERTICES(ctx, _NEW_LIGHT);
 186       light->QuadraticAttenuation = params[0];
 187       break;
 188    default:
 189       _mesa_problem(ctx, "Unexpected pname in _mesa_light()");
 190       return;
 191    }
 192
 193    if (ctx->Driver.Lightfv)
 194       ctx->Driver.Lightfv( ctx, GL_LIGHT0 + lnum, pname, params );
 195 }
 196
 197
 198 void GLAPIENTRY
 199 _mesa_Lightf( GLenum light, GLenum pname, GLfloat param )
 200 {
 201    GLfloat fparam[4];
 202    fparam[0] = param;
 203    fparam[1] = fparam[2] = fparam[3] = 0.0F;
 204    _mesa_Lightfv( light, pname, fparam );
 205 }
 206
 207
 208 void GLAPIENTRY
 209 _mesa_Lightfv( GLenum light, GLenum pname, const GLfloat *params )
 210 {
 211    GET_CURRENT_CONTEXT(ctx);
 212    GLint i = (GLint) (light - GL_LIGHT0);
 213    GLfloat temp[4];
 214
 215    if (i < 0 || i >= (GLint) ctx->Const.MaxLights) {
 216       _mesa_error( ctx, GL_INVALID_ENUM, "glLight(light=0x%x)", light );
 217       return;
 218    }
 219
 220    /* do particular error checks, transformations */
 221    switch (pname) {
 222    case GL_AMBIENT:
 223    case GL_DIFFUSE:
 224    case GL_SPECULAR:
 225       /* nothing */
 226       break;
 227    case GL_POSITION:
 228       /* transform position by ModelView matrix */
 229       TRANSFORM_POINT(temp, ctx->ModelviewMatrixStack.Top->m, params);
 230       params = temp;
 231       break;
 232    case GL_SPOT_DIRECTION:
 233       /* transform direction by inverse modelview */
 234       if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
 235          _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
 236       }
 237       TRANSFORM_DIRECTION(temp, params, ctx->ModelviewMatrixStack.Top->m);
 238       params = temp;
 239       break;
 240    case GL_SPOT_EXPONENT:
 241       if (params[0] < 0.0 || params[0] > ctx->Const.MaxSpotExponent) {
 242          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 243          return;
 244       }
 245       break;
 246    case GL_SPOT_CUTOFF:
 247       if ((params[0] < 0.0 || params[0] > 90.0) && params[0] != 180.0) {
 248          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 249          return;
 250       }
 251       break;
 252    case GL_CONSTANT_ATTENUATION:
 253       if (params[0] < 0.0) {
 254          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 255          return;
 256       }
 257       break;
 258    case GL_LINEAR_ATTENUATION:
 259       if (params[0] < 0.0) {
 260          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 261          return;
 262       }
 263       break;
 264    case GL_QUADRATIC_ATTENUATION:
 265       if (params[0] < 0.0) {
 266          _mesa_error(ctx, GL_INVALID_VALUE, "glLight");
 267          return;
 268       }
 269       break;
 270    default:
 271       _mesa_error(ctx, GL_INVALID_ENUM, "glLight(pname=0x%x)", pname);
 272       return;
 273    }
 274
 275    _mesa_light(ctx, i, pname, params);
 276 }
 277
 278
 279 void GLAPIENTRY
 280 _mesa_Lighti( GLenum light, GLenum pname, GLint param )
 281 {
 282    GLint iparam[4];
 283    iparam[0] = param;
 284    iparam[1] = iparam[2] = iparam[3] = 0;
 285    _mesa_Lightiv( light, pname, iparam );
 286 }
 287
 288
 289 void GLAPIENTRY
 290 _mesa_Lightiv( GLenum light, GLenum pname, const GLint *params )
 291 {
 292    GLfloat fparam[4];
 293
 294    switch (pname) {
 295       case GL_AMBIENT:
 296       case GL_DIFFUSE:
 297       case GL_SPECULAR:
 298          fparam[0] = INT_TO_FLOAT( params[0] );
 299          fparam[1] = INT_TO_FLOAT( params[1] );
 300          fparam[2] = INT_TO_FLOAT( params[2] );
 301          fparam[3] = INT_TO_FLOAT( params[3] );
 302          break;
 303       case GL_POSITION:
 304          fparam[0] = (GLfloat) params[0];
 305          fparam[1] = (GLfloat) params[1];
 306          fparam[2] = (GLfloat) params[2];
 307          fparam[3] = (GLfloat) params[3];
 308          break;
 309       case GL_SPOT_DIRECTION:
 310          fparam[0] = (GLfloat) params[0];
 311          fparam[1] = (GLfloat) params[1];
 312          fparam[2] = (GLfloat) params[2];
 313          break;
 314       case GL_SPOT_EXPONENT:
 315       case GL_SPOT_CUTOFF:
 316       case GL_CONSTANT_ATTENUATION:
 317       case GL_LINEAR_ATTENUATION:
 318       case GL_QUADRATIC_ATTENUATION:
 319          fparam[0] = (GLfloat) params[0];
 320          break;
 321       default:
 322          /* error will be caught later in gl_Lightfv */
 323          ;
 324    }
 325
 326    _mesa_Lightfv( light, pname, fparam );
 327 }
 328
 329
 330
 331 void GLAPIENTRY
 332 _mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params )
 333 {
 334    GET_CURRENT_CONTEXT(ctx);
 335    GLint l = (GLint) (light - GL_LIGHT0);
 336
 337    if (l < 0 || l >= (GLint) ctx->Const.MaxLights) {
 338       _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightfv" );
 339       return;
 340    }
 341
 342    switch (pname) {
 343       case GL_AMBIENT:
 344          COPY_4V( params, ctx->Light.Light[l].Ambient );
 345          break;
 346       case GL_DIFFUSE:
 347          COPY_4V( params, ctx->Light.Light[l].Diffuse );
 348          break;
 349       case GL_SPECULAR:
 350          COPY_4V( params, ctx->Light.Light[l].Specular );
 351          break;
 352       case GL_POSITION:
 353          COPY_4V( params, ctx->Light.Light[l].EyePosition );
 354          break;
 355       case GL_SPOT_DIRECTION:
 356          COPY_3V( params, ctx->Light.Light[l].SpotDirection );
 357          break;
 358       case GL_SPOT_EXPONENT:
 359          params[0] = ctx->Light.Light[l].SpotExponent;
 360          break;
 361       case GL_SPOT_CUTOFF:
 362          params[0] = ctx->Light.Light[l].SpotCutoff;
 363          break;
 364       case GL_CONSTANT_ATTENUATION:
 365          params[0] = ctx->Light.Light[l].ConstantAttenuation;
 366          break;
 367       case GL_LINEAR_ATTENUATION:
 368          params[0] = ctx->Light.Light[l].LinearAttenuation;
 369          break;
 370       case GL_QUADRATIC_ATTENUATION:
 371          params[0] = ctx->Light.Light[l].QuadraticAttenuation;
 372          break;
 373       default:
 374          _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightfv" );
 375          break;
 376    }
 377 }
 378
 379
 380 void GLAPIENTRY
 381 _mesa_GetLightiv( GLenum light, GLenum pname, GLint *params )
 382 {
 383    GET_CURRENT_CONTEXT(ctx);
 384    GLint l = (GLint) (light - GL_LIGHT0);
 385
 386    if (l < 0 || l >= (GLint) ctx->Const.MaxLights) {
 387       _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightiv" );
 388       return;
 389    }
 390
 391    switch (pname) {
 392       case GL_AMBIENT:
 393          params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[0]);
 394          params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[1]);
 395          params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[2]);
 396          params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[3]);
 397          break;
 398       case GL_DIFFUSE:
 399          params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[0]);
 400          params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[1]);
 401          params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[2]);
 402          params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[3]);
 403          break;
 404       case GL_SPECULAR:
 405          params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[0]);
 406          params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[1]);
 407          params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[2]);
 408          params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[3]);
 409          break;
 410       case GL_POSITION:
 411          params[0] = (GLint) ctx->Light.Light[l].EyePosition[0];
 412          params[1] = (GLint) ctx->Light.Light[l].EyePosition[1];
 413          params[2] = (GLint) ctx->Light.Light[l].EyePosition[2];
 414          params[3] = (GLint) ctx->Light.Light[l].EyePosition[3];
 415          break;
 416       case GL_SPOT_DIRECTION:
 417          params[0] = (GLint) ctx->Light.Light[l].SpotDirection[0];
 418          params[1] = (GLint) ctx->Light.Light[l].SpotDirection[1];
 419          params[2] = (GLint) ctx->Light.Light[l].SpotDirection[2];
 420          break;
 421       case GL_SPOT_EXPONENT:
 422          params[0] = (GLint) ctx->Light.Light[l].SpotExponent;
 423          break;
 424       case GL_SPOT_CUTOFF:
 425          params[0] = (GLint) ctx->Light.Light[l].SpotCutoff;
 426          break;
 427       case GL_CONSTANT_ATTENUATION:
 428          params[0] = (GLint) ctx->Light.Light[l].ConstantAttenuation;
 429          break;
 430       case GL_LINEAR_ATTENUATION:
 431          params[0] = (GLint) ctx->Light.Light[l].LinearAttenuation;
 432          break;
 433       case GL_QUADRATIC_ATTENUATION:
 434          params[0] = (GLint) ctx->Light.Light[l].QuadraticAttenuation;
 435          break;
 436       default:
 437          _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightiv" );
 438          break;
 439    }
 440 }
 441
 442
 443
 444 /**********************************************************************/
 445 /***                        Light Model                             ***/
 446 /**********************************************************************/
 447
 448
 449 void GLAPIENTRY
 450 _mesa_LightModelfv( GLenum pname, const GLfloat *params )
 451 {
 452    GLenum newenum;
 453    GLboolean newbool;
 454    GET_CURRENT_CONTEXT(ctx);
 455
 456    switch (pname) {
 457       case GL_LIGHT_MODEL_AMBIENT:
 458          if (TEST_EQ_4V( ctx->Light.Model.Ambient, params ))
 459             return;
 460          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 461          COPY_4V( ctx->Light.Model.Ambient, params );
 462          break;
 463       case GL_LIGHT_MODEL_LOCAL_VIEWER:
 464          if (ctx->API != API_OPENGL_COMPAT)
 465             goto invalid_pname;
 466          newbool = (params[0]!=0.0);
 467          if (ctx->Light.Model.LocalViewer == newbool)
 468             return;
 469          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 470          ctx->Light.Model.LocalViewer = newbool;
 471          break;
 472       case GL_LIGHT_MODEL_TWO_SIDE:
 473          newbool = (params[0]!=0.0);
 474          if (ctx->Light.Model.TwoSide == newbool)
 475             return;
 476          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 477          ctx->Light.Model.TwoSide = newbool;
 478          break;
 479       case GL_LIGHT_MODEL_COLOR_CONTROL:
 480          if (ctx->API != API_OPENGL_COMPAT)
 481             goto invalid_pname;
 482          if (params[0] == (GLfloat) GL_SINGLE_COLOR)
 483             newenum = GL_SINGLE_COLOR;
 484          else if (params[0] == (GLfloat) GL_SEPARATE_SPECULAR_COLOR)
 485             newenum = GL_SEPARATE_SPECULAR_COLOR;
 486          else {
 487             _mesa_error( ctx, GL_INVALID_ENUM, "glLightModel(param=0x0%x)",
 488                          (GLint) params[0] );
 489             return;
 490          }
 491          if (ctx->Light.Model.ColorControl == newenum)
 492             return;
 493          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 494          ctx->Light.Model.ColorControl = newenum;
 495          break;
 496       default:
 497          goto invalid_pname;
 498    }
 499
 500    if (ctx->Driver.LightModelfv)
 501       ctx->Driver.LightModelfv( ctx, pname, params );
 502
 503    return;
 504
 505 invalid_pname:
 506    _mesa_error( ctx, GL_INVALID_ENUM, "glLightModel(pname=0x%x)", pname );
 507    return;
 508 }
 509
 510
 511 void GLAPIENTRY
 512 _mesa_LightModeliv( GLenum pname, const GLint *params )
 513 {
 514    GLfloat fparam[4];
 515
 516    switch (pname) {
 517       case GL_LIGHT_MODEL_AMBIENT:
 518          fparam[0] = INT_TO_FLOAT( params[0] );
 519          fparam[1] = INT_TO_FLOAT( params[1] );
 520          fparam[2] = INT_TO_FLOAT( params[2] );
 521          fparam[3] = INT_TO_FLOAT( params[3] );
 522          break;
 523       case GL_LIGHT_MODEL_LOCAL_VIEWER:
 524       case GL_LIGHT_MODEL_TWO_SIDE:
 525       case GL_LIGHT_MODEL_COLOR_CONTROL:
 526          fparam[0] = (GLfloat) params[0];
 527          break;
 528       default:
 529          /* Error will be caught later in gl_LightModelfv */
 530          ASSIGN_4V(fparam, 0.0F, 0.0F, 0.0F, 0.0F);
 531    }
 532    _mesa_LightModelfv( pname, fparam );
 533 }
 534
 535
 536 void GLAPIENTRY
 537 _mesa_LightModeli( GLenum pname, GLint param )
 538 {
 539    GLint iparam[4];
 540    iparam[0] = param;
 541    iparam[1] = iparam[2] = iparam[3] = 0;
 542    _mesa_LightModeliv( pname, iparam );
 543 }
 544
 545
 546 void GLAPIENTRY
 547 _mesa_LightModelf( GLenum pname, GLfloat param )
 548 {
 549    GLfloat fparam[4];
 550    fparam[0] = param;
 551    fparam[1] = fparam[2] = fparam[3] = 0.0F;
 552    _mesa_LightModelfv( pname, fparam );
 553 }
 554
 555
 556
 557 /********** MATERIAL **********/
 558
 559
 560 /*
 561  * Given a face and pname value (ala glColorMaterial), compute a bitmask
 562  * of the targeted material values.
 563  */
 564 GLuint
 565 _mesa_material_bitmask( struct gl_context *ctx, GLenum face, GLenum pname,
 566                         GLuint legal, const char *where )
 567 {
 568    GLuint bitmask = 0;
 569
 570    /* Make a bitmask indicating what material attribute(s) we're updating */
 571    switch (pname) {
 572       case GL_EMISSION:
 573          bitmask |= MAT_BIT_FRONT_EMISSION | MAT_BIT_BACK_EMISSION;
 574          break;
 575       case GL_AMBIENT:
 576          bitmask |= MAT_BIT_FRONT_AMBIENT | MAT_BIT_BACK_AMBIENT;
 577          break;
 578       case GL_DIFFUSE:
 579          bitmask |= MAT_BIT_FRONT_DIFFUSE | MAT_BIT_BACK_DIFFUSE;
 580          break;
 581       case GL_SPECULAR:
 582          bitmask |= MAT_BIT_FRONT_SPECULAR | MAT_BIT_BACK_SPECULAR;
 583          break;
 584       case GL_SHININESS:
 585          bitmask |= MAT_BIT_FRONT_SHININESS | MAT_BIT_BACK_SHININESS;
 586          break;
 587       case GL_AMBIENT_AND_DIFFUSE:
 588          bitmask |= MAT_BIT_FRONT_AMBIENT | MAT_BIT_BACK_AMBIENT;
 589          bitmask |= MAT_BIT_FRONT_DIFFUSE | MAT_BIT_BACK_DIFFUSE;
 590          break;
 591       case GL_COLOR_INDEXES:
 592          bitmask |= MAT_BIT_FRONT_INDEXES  | MAT_BIT_BACK_INDEXES;
 593          break;
 594       default:
 595          _mesa_error( ctx, GL_INVALID_ENUM, "%s", where );
 596          return 0;
 597    }
 598
 599    if (face==GL_FRONT) {
 600       bitmask &= FRONT_MATERIAL_BITS;
 601    }
 602    else if (face==GL_BACK) {
 603       bitmask &= BACK_MATERIAL_BITS;
 604    }
 605    else if (face != GL_FRONT_AND_BACK) {
 606       _mesa_error( ctx, GL_INVALID_ENUM, "%s", where );
 607       return 0;
 608    }
 609
 610    if (bitmask & ~legal) {
 611       _mesa_error( ctx, GL_INVALID_ENUM, "%s", where );
 612       return 0;
 613    }
 614
 615    return bitmask;
 616 }
 617
 618
 619
 620 /* Update derived values following a change in ctx->Light.Material
 621  */
 622 void
 623 _mesa_update_material( struct gl_context *ctx, GLuint bitmask )
 624 {
 625    struct gl_light *light, *list = &ctx->Light.EnabledList;
 626    GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
 627
 628    if (MESA_VERBOSE & VERBOSE_MATERIAL)
 629       _mesa_debug(ctx, "_mesa_update_material, mask 0x%x\n", bitmask);
 630
 631    if (!bitmask)
 632       return;
 633
 634    /* update material ambience */
 635    if (bitmask & MAT_BIT_FRONT_AMBIENT) {
 636       foreach (light, list) {
 637          SCALE_3V( light->_MatAmbient[0], light->Ambient,
 638                    mat[MAT_ATTRIB_FRONT_AMBIENT]);
 639       }
 640    }
 641
 642    if (bitmask & MAT_BIT_BACK_AMBIENT) {
 643       foreach (light, list) {
 644          SCALE_3V( light->_MatAmbient[1], light->Ambient,
 645                    mat[MAT_ATTRIB_BACK_AMBIENT]);
 646       }
 647    }
 648
 649    /* update BaseColor = emission + scene's ambience * material's ambience */
 650    if (bitmask & (MAT_BIT_FRONT_EMISSION | MAT_BIT_FRONT_AMBIENT)) {
 651       COPY_3V( ctx->Light._BaseColor[0], mat[MAT_ATTRIB_FRONT_EMISSION] );
 652       ACC_SCALE_3V( ctx->Light._BaseColor[0], mat[MAT_ATTRIB_FRONT_AMBIENT],
 653                     ctx->Light.Model.Ambient );
 654    }
 655
 656    if (bitmask & (MAT_BIT_BACK_EMISSION | MAT_BIT_BACK_AMBIENT)) {
 657       COPY_3V( ctx->Light._BaseColor[1], mat[MAT_ATTRIB_BACK_EMISSION] );
 658       ACC_SCALE_3V( ctx->Light._BaseColor[1], mat[MAT_ATTRIB_BACK_AMBIENT],
 659                     ctx->Light.Model.Ambient );
 660    }
 661
 662    /* update material diffuse values */
 663    if (bitmask & MAT_BIT_FRONT_DIFFUSE) {
 664       foreach (light, list) {
 665          SCALE_3V( light->_MatDiffuse[0], light->Diffuse,
 666                    mat[MAT_ATTRIB_FRONT_DIFFUSE] );
 667       }
 668    }
 669
 670    if (bitmask & MAT_BIT_BACK_DIFFUSE) {
 671       foreach (light, list) {
 672          SCALE_3V( light->_MatDiffuse[1], light->Diffuse,
 673                    mat[MAT_ATTRIB_BACK_DIFFUSE] );
 674       }
 675    }
 676
 677    /* update material specular values */
 678    if (bitmask & MAT_BIT_FRONT_SPECULAR) {
 679       foreach (light, list) {
 680          SCALE_3V( light->_MatSpecular[0], light->Specular,
 681                    mat[MAT_ATTRIB_FRONT_SPECULAR]);
 682       }
 683    }
 684
 685    if (bitmask & MAT_BIT_BACK_SPECULAR) {
 686       foreach (light, list) {
 687          SCALE_3V( light->_MatSpecular[1], light->Specular,
 688                    mat[MAT_ATTRIB_BACK_SPECULAR]);
 689       }
 690    }
 691 }
 692
 693
 694 /*
 695  * Update the current materials from the given rgba color
 696  * according to the bitmask in _ColorMaterialBitmask, which is
 697  * set by glColorMaterial().
 698  */
 699 void
 700 _mesa_update_color_material( struct gl_context *ctx, const GLfloat color[4] )
 701 {
 702    const GLbitfield bitmask = ctx->Light._ColorMaterialBitmask;
 703    struct gl_material *mat = &ctx->Light.Material;
 704    int i;
 705
 706    for (i = 0 ; i < MAT_ATTRIB_MAX ; i++)
 707       if (bitmask & (1<<i))
 708          COPY_4FV( mat->Attrib[i], color );
 709
 710    _mesa_update_material( ctx, bitmask );
 711 }
 712
 713
 714 void GLAPIENTRY
 715 _mesa_ColorMaterial( GLenum face, GLenum mode )
 716 {
 717    GET_CURRENT_CONTEXT(ctx);
 718    GLuint bitmask;
 719    GLuint legal = (MAT_BIT_FRONT_EMISSION | MAT_BIT_BACK_EMISSION |
 720                    MAT_BIT_FRONT_SPECULAR | MAT_BIT_BACK_SPECULAR |
 721                    MAT_BIT_FRONT_DIFFUSE  | MAT_BIT_BACK_DIFFUSE  |
 722                    MAT_BIT_FRONT_AMBIENT  | MAT_BIT_BACK_AMBIENT);
 723
 724    if (MESA_VERBOSE&VERBOSE_API)
 725       _mesa_debug(ctx, "glColorMaterial %s %s\n",
 726                   _mesa_lookup_enum_by_nr(face),
 727                   _mesa_lookup_enum_by_nr(mode));
 728
 729    bitmask = _mesa_material_bitmask(ctx, face, mode, legal, "glColorMaterial");
 730    if (bitmask == 0)
 731       return; /* error was recorded */
 732
 733    if (ctx->Light._ColorMaterialBitmask == bitmask &&
 734        ctx->Light.ColorMaterialFace == face &&
 735        ctx->Light.ColorMaterialMode == mode)
 736       return;
 737
 738    FLUSH_VERTICES(ctx, _NEW_LIGHT);
 739    ctx->Light._ColorMaterialBitmask = bitmask;
 740    ctx->Light.ColorMaterialFace = face;
 741    ctx->Light.ColorMaterialMode = mode;
 742
 743    if (ctx->Light.ColorMaterialEnabled) {
 744       FLUSH_CURRENT( ctx, 0 );
 745       _mesa_update_color_material(ctx,ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
 746    }
 747
 748    if (ctx->Driver.ColorMaterial)
 749       ctx->Driver.ColorMaterial( ctx, face, mode );
 750 }
 751
 752
 753 void GLAPIENTRY
 754 _mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params )
 755 {
 756    GET_CURRENT_CONTEXT(ctx);
 757    GLuint f;
 758    GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
 759    FLUSH_VERTICES(ctx, 0); /* update materials */
 760
 761    FLUSH_CURRENT(ctx, 0); /* update ctx->Light.Material from vertex buffer */
 762
 763    if (face==GL_FRONT) {
 764       f = 0;
 765    }
 766    else if (face==GL_BACK) {
 767       f = 1;
 768    }
 769    else {
 770       _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(face)" );
 771       return;
 772    }
 773
 774    switch (pname) {
 775       case GL_AMBIENT:
 776          COPY_4FV( params, mat[MAT_ATTRIB_AMBIENT(f)] );
 777          break;
 778       case GL_DIFFUSE:
 779          COPY_4FV( params, mat[MAT_ATTRIB_DIFFUSE(f)] );
 780          break;
 781       case GL_SPECULAR:
 782          COPY_4FV( params, mat[MAT_ATTRIB_SPECULAR(f)] );
 783          break;
 784       case GL_EMISSION:
 785          COPY_4FV( params, mat[MAT_ATTRIB_EMISSION(f)] );
 786          break;
 787       case GL_SHININESS:
 788          *params = mat[MAT_ATTRIB_SHININESS(f)][0];
 789          break;
 790       case GL_COLOR_INDEXES:
 791          if (ctx->API != API_OPENGL_COMPAT) {
 792             _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(pname)" );
 793             return;
 794          }
 795          params[0] = mat[MAT_ATTRIB_INDEXES(f)][0];
 796          params[1] = mat[MAT_ATTRIB_INDEXES(f)][1];
 797          params[2] = mat[MAT_ATTRIB_INDEXES(f)][2];
 798          break;
 799       default:
 800          _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(pname)" );
 801    }
 802 }
 803
 804
 805 void GLAPIENTRY
 806 _mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params )
 807 {
 808    GET_CURRENT_CONTEXT(ctx);
 809    GLuint f;
 810    GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
 811
 812    assert(ctx->API == API_OPENGL_COMPAT);
 813
 814    FLUSH_VERTICES(ctx, 0); /* update materials */
 815    FLUSH_CURRENT(ctx, 0); /* update ctx->Light.Material from vertex buffer */
 816
 817    if (face==GL_FRONT) {
 818       f = 0;
 819    }
 820    else if (face==GL_BACK) {
 821       f = 1;
 822    }
 823    else {
 824       _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialiv(face)" );
 825       return;
 826    }
 827    switch (pname) {
 828       case GL_AMBIENT:
 829          params[0] = FLOAT_TO_INT( mat[MAT_ATTRIB_AMBIENT(f)][0] );
 830          params[1] = FLOAT_TO_INT( mat[MAT_ATTRIB_AMBIENT(f)][1] );
 831          params[2] = FLOAT_TO_INT( mat[MAT_ATTRIB_AMBIENT(f)][2] );
 832          params[3] = FLOAT_TO_INT( mat[MAT_ATTRIB_AMBIENT(f)][3] );
 833          break;
 834       case GL_DIFFUSE:
 835          params[0] = FLOAT_TO_INT( mat[MAT_ATTRIB_DIFFUSE(f)][0] );
 836          params[1] = FLOAT_TO_INT( mat[MAT_ATTRIB_DIFFUSE(f)][1] );
 837          params[2] = FLOAT_TO_INT( mat[MAT_ATTRIB_DIFFUSE(f)][2] );
 838          params[3] = FLOAT_TO_INT( mat[MAT_ATTRIB_DIFFUSE(f)][3] );
 839          break;
 840       case GL_SPECULAR:
 841          params[0] = FLOAT_TO_INT( mat[MAT_ATTRIB_SPECULAR(f)][0] );
 842          params[1] = FLOAT_TO_INT( mat[MAT_ATTRIB_SPECULAR(f)][1] );
 843          params[2] = FLOAT_TO_INT( mat[MAT_ATTRIB_SPECULAR(f)][2] );
 844          params[3] = FLOAT_TO_INT( mat[MAT_ATTRIB_SPECULAR(f)][3] );
 845          break;
 846       case GL_EMISSION:
 847          params[0] = FLOAT_TO_INT( mat[MAT_ATTRIB_EMISSION(f)][0] );
 848          params[1] = FLOAT_TO_INT( mat[MAT_ATTRIB_EMISSION(f)][1] );
 849          params[2] = FLOAT_TO_INT( mat[MAT_ATTRIB_EMISSION(f)][2] );
 850          params[3] = FLOAT_TO_INT( mat[MAT_ATTRIB_EMISSION(f)][3] );
 851          break;
 852       case GL_SHININESS:
 853          *params = IROUND( mat[MAT_ATTRIB_SHININESS(f)][0] );
 854          break;
 855       case GL_COLOR_INDEXES:
 856          params[0] = IROUND( mat[MAT_ATTRIB_INDEXES(f)][0] );
 857          params[1] = IROUND( mat[MAT_ATTRIB_INDEXES(f)][1] );
 858          params[2] = IROUND( mat[MAT_ATTRIB_INDEXES(f)][2] );
 859          break;
 860       default:
 861          _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(pname)" );
 862    }
 863 }
 864
 865
 866
 867 /**
 868  * Examine current lighting parameters to determine if the optimized lighting
 869  * function can be used.
 870  * Also, precompute some lighting values such as the products of light
 871  * source and material ambient, diffuse and specular coefficients.
 872  */
 873 void
 874 _mesa_update_lighting( struct gl_context *ctx )
 875 {
 876    GLbitfield flags = 0;
 877    struct gl_light *light;
 878    ctx->Light._NeedEyeCoords = GL_FALSE;
 879
 880    if (!ctx->Light.Enabled)
 881       return;
 882
 883    foreach(light, &ctx->Light.EnabledList) {
 884       flags |= light->_Flags;
 885    }
 886
 887    ctx->Light._NeedVertices =
 888       ((flags & (LIGHT_POSITIONAL|LIGHT_SPOT)) ||
 889        ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ||
 890        ctx->Light.Model.LocalViewer);
 891
 892    ctx->Light._NeedEyeCoords = ((flags & LIGHT_POSITIONAL) ||
 893                                 ctx->Light.Model.LocalViewer);
 894
 895    /* XXX: This test is overkill & needs to be fixed both for software and
 896     * hardware t&l drivers.  The above should be sufficient & should
 897     * be tested to verify this.
 898     */
 899    if (ctx->Light._NeedVertices)
 900       ctx->Light._NeedEyeCoords = GL_TRUE;
 901
 902    /* Precompute some shading values.  Although we reference
 903     * Light.Material here, we can get away without flushing
 904     * FLUSH_UPDATE_CURRENT, as when any outstanding material changes
 905     * are flushed, they will update the derived state at that time.
 906     */
 907    if (ctx->Light.Model.TwoSide)
 908       _mesa_update_material(ctx,
 909                             MAT_BIT_FRONT_EMISSION |
 910                             MAT_BIT_FRONT_AMBIENT |
 911                             MAT_BIT_FRONT_DIFFUSE |
 912                             MAT_BIT_FRONT_SPECULAR |
 913                             MAT_BIT_BACK_EMISSION |
 914                             MAT_BIT_BACK_AMBIENT |
 915                             MAT_BIT_BACK_DIFFUSE |
 916                             MAT_BIT_BACK_SPECULAR);
 917    else
 918       _mesa_update_material(ctx,
 919                             MAT_BIT_FRONT_EMISSION |
 920                             MAT_BIT_FRONT_AMBIENT |
 921                             MAT_BIT_FRONT_DIFFUSE |
 922                             MAT_BIT_FRONT_SPECULAR);
 923 }
 924
 925
 926 /**
 927  * Update state derived from light position, spot direction.
 928  * Called upon:
 929  *   _NEW_MODELVIEW
 930  *   _NEW_LIGHT
 931  *   _TNL_NEW_NEED_EYE_COORDS
 932  *
 933  * Update on (_NEW_MODELVIEW | _NEW_LIGHT) when lighting is enabled.
 934  * Also update on lighting space changes.
 935  */
 936 static void
 937 compute_light_positions( struct gl_context *ctx )
 938 {
 939    struct gl_light *light;
 940    static const GLfloat eye_z[3] = { 0, 0, 1 };
 941
 942    if (!ctx->Light.Enabled)
 943       return;
 944
 945    if (ctx->_NeedEyeCoords) {
 946       COPY_3V( ctx->_EyeZDir, eye_z );
 947    }
 948    else {
 949       TRANSFORM_NORMAL( ctx->_EyeZDir, eye_z, ctx->ModelviewMatrixStack.Top->m );
 950    }
 951
 952    foreach (light, &ctx->Light.EnabledList) {
 953
 954       if (ctx->_NeedEyeCoords) {
 955          /* _Position is in eye coordinate space */
 956          COPY_4FV( light->_Position, light->EyePosition );
 957       }
 958       else {
 959          /* _Position is in object coordinate space */
 960          TRANSFORM_POINT( light->_Position, ctx->ModelviewMatrixStack.Top->inv,
 961                           light->EyePosition );
 962       }
 963
 964       if (!(light->_Flags & LIGHT_POSITIONAL)) {
 965          /* VP (VP) = Normalize( Position ) */
 966          COPY_3V( light->_VP_inf_norm, light->_Position );
 967          NORMALIZE_3FV( light->_VP_inf_norm );
 968
 969          if (!ctx->Light.Model.LocalViewer) {
 970             /* _h_inf_norm = Normalize( V_to_P + <0,0,1> ) */
 971             ADD_3V( light->_h_inf_norm, light->_VP_inf_norm, ctx->_EyeZDir);
 972             NORMALIZE_3FV( light->_h_inf_norm );
 973          }
 974          light->_VP_inf_spot_attenuation = 1.0;
 975       }
 976       else {
 977          /* positional light w/ homogeneous coordinate, divide by W */
 978          GLfloat wInv = (GLfloat)1.0 / light->_Position[3];
 979          light->_Position[0] *= wInv;
 980          light->_Position[1] *= wInv;
 981          light->_Position[2] *= wInv;
 982       }
 983
 984       if (light->_Flags & LIGHT_SPOT) {
 985          /* Note: we normalize the spot direction now */
 986
 987          if (ctx->_NeedEyeCoords) {
 988             COPY_3V( light->_NormSpotDirection, light->SpotDirection );
 989             NORMALIZE_3FV( light->_NormSpotDirection );
 990          }
 991          else {
 992             GLfloat spotDir[3];
 993             COPY_3V(spotDir, light->SpotDirection);
 994             NORMALIZE_3FV(spotDir);
 995             TRANSFORM_NORMAL( light->_NormSpotDirection,
 996                               spotDir,
 997                               ctx->ModelviewMatrixStack.Top->m);
 998          }
 999
1000          NORMALIZE_3FV( light->_NormSpotDirection );
1001
1002          if (!(light->_Flags & LIGHT_POSITIONAL)) {
1003             GLfloat PV_dot_dir = - DOT3(light->_VP_inf_norm,
1004                                         light->_NormSpotDirection);
1005
1006             if (PV_dot_dir > light->_CosCutoff) {
1007                light->_VP_inf_spot_attenuation =
1008                   powf(PV_dot_dir, light->SpotExponent);
1009             }
1010             else {
1011                light->_VP_inf_spot_attenuation = 0;
1012             }
1013          }
1014       }
1015    }
1016 }
1017
1018
1019
1020 static void
1021 update_modelview_scale( struct gl_context *ctx )
1022 {
1023    ctx->_ModelViewInvScale = 1.0F;
1024    if (!_math_matrix_is_length_preserving(ctx->ModelviewMatrixStack.Top)) {
1025       const GLfloat *m = ctx->ModelviewMatrixStack.Top->inv;
1026       GLfloat f = m[2] * m[2] + m[6] * m[6] + m[10] * m[10];
1027       if (f < 1e-12) f = 1.0;
1028       if (ctx->_NeedEyeCoords)
1029          ctx->_ModelViewInvScale = 1.0f / sqrtf(f);
1030       else
1031          ctx->_ModelViewInvScale = sqrtf(f);
1032    }
1033 }
1034
1035
1036 /**
1037  * Bring up to date any state that relies on _NeedEyeCoords.
1038  */
1039 void
1040 _mesa_update_tnl_spaces( struct gl_context *ctx, GLuint new_state )
1041 {
1042    const GLuint oldneedeyecoords = ctx->_NeedEyeCoords;
1043
1044    (void) new_state;
1045    ctx->_NeedEyeCoords = GL_FALSE;
1046
1047    if (ctx->_ForceEyeCoords ||
1048        (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD) ||
1049        ctx->Point._Attenuated ||
1050        ctx->Light._NeedEyeCoords)
1051       ctx->_NeedEyeCoords = GL_TRUE;
1052
1053    if (ctx->Light.Enabled &&
1054        !_math_matrix_is_length_preserving(ctx->ModelviewMatrixStack.Top))
1055       ctx->_NeedEyeCoords = GL_TRUE;
1056
1057    /* Check if the truth-value interpretations of the bitfields have
1058     * changed:
1059     */
1060    if (oldneedeyecoords != ctx->_NeedEyeCoords) {
1061       /* Recalculate all state that depends on _NeedEyeCoords.
1062        */
1063       update_modelview_scale(ctx);
1064       compute_light_positions( ctx );
1065
1066       if (ctx->Driver.LightingSpaceChange)
1067          ctx->Driver.LightingSpaceChange( ctx );
1068    }
1069    else {
1070       GLuint new_state2 = ctx->NewState;
1071
1072       /* Recalculate that same state only if it has been invalidated
1073        * by other statechanges.
1074        */
1075       if (new_state2 & _NEW_MODELVIEW)
1076          update_modelview_scale(ctx);
1077
1078       if (new_state2 & (_NEW_LIGHT|_NEW_MODELVIEW))
1079          compute_light_positions( ctx );
1080    }
1081 }
1082
1083
1084 /**
1085  * Drivers may need this if the hardware tnl unit doesn't support the
1086  * light-in-modelspace optimization.  It's also useful for debugging.
1087  */
1088 void
1089 _mesa_allow_light_in_model( struct gl_context *ctx, GLboolean flag )
1090 {
1091    ctx->_ForceEyeCoords = !flag;
1092    ctx->NewState |= _NEW_POINT; /* one of the bits from
1093                                  * _MESA_NEW_NEED_EYE_COORDS.
1094                                  */
1095 }
1096
1097
1098
1099 /**********************************************************************/
1100 /*****                      Initialization                        *****/
1101 /**********************************************************************/
1102
1103 /**
1104  * Initialize the n-th light data structure.
1105  *
1106  * \param l pointer to the gl_light structure to be initialized.
1107  * \param n number of the light.
1108  * \note The defaults for light 0 are different than the other lights.
1109  */
1110 static void
1111 init_light( struct gl_light *l, GLuint n )
1112 {
1113    make_empty_list( l );
1114
1115    ASSIGN_4V( l->Ambient, 0.0, 0.0, 0.0, 1.0 );
1116    if (n==0) {
1117       ASSIGN_4V( l->Diffuse, 1.0, 1.0, 1.0, 1.0 );
1118       ASSIGN_4V( l->Specular, 1.0, 1.0, 1.0, 1.0 );
1119    }
1120    else {
1121       ASSIGN_4V( l->Diffuse, 0.0, 0.0, 0.0, 1.0 );
1122       ASSIGN_4V( l->Specular, 0.0, 0.0, 0.0, 1.0 );
1123    }
1124    ASSIGN_4V( l->EyePosition, 0.0, 0.0, 1.0, 0.0 );
1125    ASSIGN_3V( l->SpotDirection, 0.0, 0.0, -1.0 );
1126    l->SpotExponent = 0.0;
1127    l->SpotCutoff = 180.0;
1128    l->_CosCutoff = 0.0;         /* KW: -ve values not admitted */
1129    l->ConstantAttenuation = 1.0;
1130    l->LinearAttenuation = 0.0;
1131    l->QuadraticAttenuation = 0.0;
1132    l->Enabled = GL_FALSE;
1133 }
1134
1135
1136 /**
1137  * Initialize the light model data structure.
1138  *
1139  * \param lm pointer to the gl_lightmodel structure to be initialized.
1140  */
1141 static void
1142 init_lightmodel( struct gl_lightmodel *lm )
1143 {
1144    ASSIGN_4V( lm->Ambient, 0.2F, 0.2F, 0.2F, 1.0F );
1145    lm->LocalViewer = GL_FALSE;
1146    lm->TwoSide = GL_FALSE;
1147    lm->ColorControl = GL_SINGLE_COLOR;
1148 }
1149
1150
1151 /**
1152  * Initialize the material data structure.
1153  *
1154  * \param m pointer to the gl_material structure to be initialized.
1155  */
1156 static void
1157 init_material( struct gl_material *m )
1158 {
1159    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_AMBIENT],  0.2F, 0.2F, 0.2F, 1.0F );
1160    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_DIFFUSE],  0.8F, 0.8F, 0.8F, 1.0F );
1161    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_SPECULAR], 0.0F, 0.0F, 0.0F, 1.0F );
1162    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_EMISSION], 0.0F, 0.0F, 0.0F, 1.0F );
1163    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_SHININESS], 0.0F, 0.0F, 0.0F, 0.0F );
1164    ASSIGN_4V( m->Attrib[MAT_ATTRIB_FRONT_INDEXES], 0.0F, 1.0F, 1.0F, 0.0F );
1165
1166    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_AMBIENT],  0.2F, 0.2F, 0.2F, 1.0F );
1167    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_DIFFUSE],  0.8F, 0.8F, 0.8F, 1.0F );
1168    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_SPECULAR], 0.0F, 0.0F, 0.0F, 1.0F );
1169    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_EMISSION], 0.0F, 0.0F, 0.0F, 1.0F );
1170    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_SHININESS], 0.0F, 0.0F, 0.0F, 0.0F );
1171    ASSIGN_4V( m->Attrib[MAT_ATTRIB_BACK_INDEXES], 0.0F, 1.0F, 1.0F, 0.0F );
1172 }
1173
1174
1175 /**
1176  * Initialize all lighting state for the given context.
1177  */
1178 void
1179 _mesa_init_lighting( struct gl_context *ctx )
1180 {
1181    GLuint i;
1182
1183    /* Lighting group */
1184    for (i = 0; i < MAX_LIGHTS; i++) {
1185       init_light( &ctx->Light.Light[i], i );
1186    }
1187    make_empty_list( &ctx->Light.EnabledList );
1188
1189    init_lightmodel( &ctx->Light.Model );
1190    init_material( &ctx->Light.Material );
1191    ctx->Light.ShadeModel = GL_SMOOTH;
1192    ctx->Light.ProvokingVertex = GL_LAST_VERTEX_CONVENTION_EXT;
1193    ctx->Light.Enabled = GL_FALSE;
1194    ctx->Light.ColorMaterialFace = GL_FRONT_AND_BACK;
1195    ctx->Light.ColorMaterialMode = GL_AMBIENT_AND_DIFFUSE;
1196    ctx->Light._ColorMaterialBitmask = _mesa_material_bitmask( ctx,
1197                                                GL_FRONT_AND_BACK,
1198                                                GL_AMBIENT_AND_DIFFUSE, ~0,
1199                                                NULL );
1200
1201    ctx->Light.ColorMaterialEnabled = GL_FALSE;
1202    ctx->Light.ClampVertexColor = ctx->API == API_OPENGL_COMPAT;
1203    ctx->Light._ClampVertexColor = ctx->API == API_OPENGL_COMPAT;
1204
1205    /* Miscellaneous */
1206    ctx->Light._NeedEyeCoords = GL_FALSE;
1207    ctx->_NeedEyeCoords = GL_FALSE;
1208    ctx->_ForceEyeCoords = GL_FALSE;
1209    ctx->_ModelViewInvScale = 1.0;
1210 }