src/mesa/main/enable.c

   1 /* $Id: enable.c,v 1.14 2000/04/07 16:27:26 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   6  *
   7  * Copyright (C) 1999  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 "context.h"
  33 #include "enable.h"
  34 #include "light.h"
  35 #include "macros.h"
  36 #include "matrix.h"
  37 #include "mmath.h"
  38 #include "simple_list.h"
  39 #include "types.h"
  40 #include "vbfill.h"
  41 #include "xform.h"
  42 #include "enums.h"
  43 #endif
  44
  45
  46
  47 /*
  48  * Perform glEnable and glDisable calls.
  49  */
  50 void _mesa_set_enable( GLcontext *ctx, GLenum cap, GLboolean state )
  51 {
  52    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx, "gl_enable/disable" );
  53
  54    if (MESA_VERBOSE & VERBOSE_API)
  55       fprintf(stderr, "%s %s (newstate is %x)\n",
  56               state ? "glEnable" : "glDisable",
  57               gl_lookup_enum_by_nr(cap),
  58               ctx->NewState);
  59
  60    switch (cap) {
  61       case GL_ALPHA_TEST:
  62          if (ctx->Color.AlphaEnabled!=state) {
  63             ctx->Color.AlphaEnabled = state;
  64             ctx->NewState |= NEW_RASTER_OPS;
  65          }
  66          break;
  67       case GL_AUTO_NORMAL:
  68          ctx->Eval.AutoNormal = state;
  69          break;
  70       case GL_BLEND:
  71          if (ctx->Color.BlendEnabled!=state) {
  72             ctx->Color.BlendEnabled = state;
  73             /* The following needed to accomodate 1.0 RGB logic op blending */
  74             if (ctx->Color.BlendEquation==GL_LOGIC_OP && state) {
  75                ctx->Color.ColorLogicOpEnabled = GL_TRUE;
  76             }
  77             else {
  78                ctx->Color.ColorLogicOpEnabled = GL_FALSE;
  79             }
  80             ctx->NewState |= NEW_RASTER_OPS;
  81          }
  82          break;
  83       case GL_CLIP_PLANE0:
  84       case GL_CLIP_PLANE1:
  85       case GL_CLIP_PLANE2:
  86       case GL_CLIP_PLANE3:
  87       case GL_CLIP_PLANE4:
  88       case GL_CLIP_PLANE5:
  89          if (cap >= GL_CLIP_PLANE0 &&
  90              cap <= GL_CLIP_PLANE5 &&
  91              ctx->Transform.ClipEnabled[cap-GL_CLIP_PLANE0] != state)
  92          {
  93             GLuint p = cap-GL_CLIP_PLANE0;
  94
  95             ctx->Transform.ClipEnabled[p] = state;
  96             ctx->NewState |= NEW_USER_CLIP;
  97
  98             if (state) {
  99                ctx->Enabled |= ENABLE_USERCLIP;
 100                ctx->Transform.AnyClip++;
 101
 102                if (ctx->ProjectionMatrix.flags & MAT_DIRTY_ALL_OVER) {
 103                   gl_matrix_analyze( &ctx->ProjectionMatrix );
 104                }
 105
 106                gl_transform_vector( ctx->Transform.ClipUserPlane[p],
 107                                     ctx->Transform.EyeUserPlane[p],
 108                                     ctx->ProjectionMatrix.inv );
 109             } else {
 110                if (--ctx->Transform.AnyClip == 0)
 111                   ctx->Enabled &= ~ENABLE_USERCLIP;
 112             }
 113          }
 114          break;
 115       case GL_COLOR_MATERIAL:
 116          if (ctx->Light.ColorMaterialEnabled!=state) {
 117             ctx->Light.ColorMaterialEnabled = state;
 118             ctx->NewState |= NEW_LIGHTING;
 119             if (state)
 120                gl_update_color_material( ctx, ctx->Current.ByteColor );
 121          }
 122          break;
 123       case GL_CULL_FACE:
 124          if (ctx->Polygon.CullFlag!=state) {
 125             ctx->Polygon.CullFlag = state;
 126             ctx->TriangleCaps ^= DD_TRI_CULL;
 127             ctx->NewState |= NEW_POLYGON;
 128          }
 129          break;
 130       case GL_DEPTH_TEST:
 131          if (state && ctx->Visual->DepthBits==0) {
 132             gl_warning(ctx,"glEnable(GL_DEPTH_TEST) but no depth buffer");
 133             return;
 134          }
 135          if (ctx->Depth.Test!=state) {
 136             ctx->Depth.Test = state;
 137             ctx->NewState |= NEW_RASTER_OPS;
 138          }
 139          break;
 140       case GL_DITHER:
 141          if (ctx->NoDither) {
 142             /* MESA_NO_DITHER env var */
 143             state = GL_FALSE;
 144          }
 145          if (ctx->Color.DitherFlag!=state) {
 146             ctx->Color.DitherFlag = state;
 147             ctx->NewState |= NEW_RASTER_OPS;
 148          }
 149          break;
 150       case GL_FOG:
 151          if (ctx->Fog.Enabled!=state) {
 152             ctx->Fog.Enabled = state;
 153             ctx->Enabled ^= ENABLE_FOG;
 154             ctx->NewState |= NEW_FOG|NEW_RASTER_OPS;
 155          }
 156          break;
 157       case GL_LIGHT0:
 158       case GL_LIGHT1:
 159       case GL_LIGHT2:
 160       case GL_LIGHT3:
 161       case GL_LIGHT4:
 162       case GL_LIGHT5:
 163       case GL_LIGHT6:
 164       case GL_LIGHT7:
 165          if (ctx->Light.Light[cap-GL_LIGHT0].Enabled != state)
 166          {
 167             ctx->Light.Light[cap-GL_LIGHT0].Enabled = state;
 168
 169             if (state) {
 170                insert_at_tail(&ctx->Light.EnabledList,
 171                               &ctx->Light.Light[cap-GL_LIGHT0]);
 172                if (ctx->Light.Enabled)
 173                   ctx->Enabled |= ENABLE_LIGHT;
 174             } else {
 175                remove_from_list(&ctx->Light.Light[cap-GL_LIGHT0]);
 176                if (is_empty_list(&ctx->Light.EnabledList))
 177                   ctx->Enabled &= ~ENABLE_LIGHT;
 178             }
 179
 180             ctx->NewState |= NEW_LIGHTING;
 181          }
 182          break;
 183       case GL_LIGHTING:
 184          if (ctx->Light.Enabled!=state) {
 185             ctx->Light.Enabled = state;
 186             ctx->Enabled &= ~ENABLE_LIGHT;
 187             if (state)
 188                ctx->Enabled |= ENABLE_LIGHT;
 189             ctx->NewState |= NEW_LIGHTING;
 190          }
 191          break;
 192       case GL_LINE_SMOOTH:
 193          if (ctx->Line.SmoothFlag!=state) {
 194             ctx->Line.SmoothFlag = state;
 195             ctx->NewState |= NEW_RASTER_OPS;
 196          }
 197          break;
 198       case GL_LINE_STIPPLE:
 199          if (ctx->Line.StippleFlag!=state) {
 200             ctx->Line.StippleFlag = state;
 201             ctx->TriangleCaps ^= DD_LINE_STIPPLE;
 202             ctx->NewState |= NEW_RASTER_OPS;
 203          }
 204          break;
 205       case GL_INDEX_LOGIC_OP:
 206          if (ctx->Color.IndexLogicOpEnabled!=state) {
 207             ctx->Color.IndexLogicOpEnabled = state;
 208             ctx->NewState |= NEW_RASTER_OPS;
 209          }
 210          break;
 211       case GL_COLOR_LOGIC_OP:
 212          if (ctx->Color.ColorLogicOpEnabled!=state) {
 213             ctx->Color.ColorLogicOpEnabled = state;
 214             ctx->NewState |= NEW_RASTER_OPS;
 215          }
 216          break;
 217       case GL_MAP1_COLOR_4:
 218          ctx->Eval.Map1Color4 = state;
 219          break;
 220       case GL_MAP1_INDEX:
 221          ctx->Eval.Map1Index = state;
 222          break;
 223       case GL_MAP1_NORMAL:
 224          ctx->Eval.Map1Normal = state;
 225          break;
 226       case GL_MAP1_TEXTURE_COORD_1:
 227          ctx->Eval.Map1TextureCoord1 = state;
 228          break;
 229       case GL_MAP1_TEXTURE_COORD_2:
 230          ctx->Eval.Map1TextureCoord2 = state;
 231          break;
 232       case GL_MAP1_TEXTURE_COORD_3:
 233          ctx->Eval.Map1TextureCoord3 = state;
 234          break;
 235       case GL_MAP1_TEXTURE_COORD_4:
 236          ctx->Eval.Map1TextureCoord4 = state;
 237          break;
 238       case GL_MAP1_VERTEX_3:
 239          ctx->Eval.Map1Vertex3 = state;
 240          break;
 241       case GL_MAP1_VERTEX_4:
 242          ctx->Eval.Map1Vertex4 = state;
 243          break;
 244       case GL_MAP2_COLOR_4:
 245          ctx->Eval.Map2Color4 = state;
 246          break;
 247       case GL_MAP2_INDEX:
 248          ctx->Eval.Map2Index = state;
 249          break;
 250       case GL_MAP2_NORMAL:
 251          ctx->Eval.Map2Normal = state;
 252          break;
 253       case GL_MAP2_TEXTURE_COORD_1:
 254          ctx->Eval.Map2TextureCoord1 = state;
 255          break;
 256       case GL_MAP2_TEXTURE_COORD_2:
 257          ctx->Eval.Map2TextureCoord2 = state;
 258          break;
 259       case GL_MAP2_TEXTURE_COORD_3:
 260          ctx->Eval.Map2TextureCoord3 = state;
 261          break;
 262       case GL_MAP2_TEXTURE_COORD_4:
 263          ctx->Eval.Map2TextureCoord4 = state;
 264          break;
 265       case GL_MAP2_VERTEX_3:
 266          ctx->Eval.Map2Vertex3 = state;
 267          break;
 268       case GL_MAP2_VERTEX_4:
 269          ctx->Eval.Map2Vertex4 = state;
 270          break;
 271       case GL_NORMALIZE:
 272          if (ctx->Transform.Normalize != state) {
 273             ctx->Transform.Normalize = state;
 274             ctx->NewState |= NEW_NORMAL_TRANSFORM|NEW_LIGHTING;
 275             ctx->Enabled ^= ENABLE_NORMALIZE;
 276          }
 277          break;
 278       case GL_POINT_SMOOTH:
 279          if (ctx->Point.SmoothFlag!=state) {
 280             ctx->Point.SmoothFlag = state;
 281             ctx->NewState |= NEW_RASTER_OPS;
 282          }
 283          break;
 284       case GL_POLYGON_SMOOTH:
 285          if (ctx->Polygon.SmoothFlag!=state) {
 286             ctx->Polygon.SmoothFlag = state;
 287             ctx->NewState |= NEW_RASTER_OPS;
 288          }
 289          break;
 290       case GL_POLYGON_STIPPLE:
 291          if (ctx->Polygon.StippleFlag!=state) {
 292             ctx->Polygon.StippleFlag = state;
 293             ctx->TriangleCaps ^= DD_TRI_STIPPLE;
 294             ctx->NewState |= NEW_RASTER_OPS;
 295          }
 296          break;
 297       case GL_POLYGON_OFFSET_POINT:
 298          if (ctx->Polygon.OffsetPoint!=state) {
 299             ctx->Polygon.OffsetPoint = state;
 300             ctx->NewState |= NEW_POLYGON;
 301          }
 302          break;
 303       case GL_POLYGON_OFFSET_LINE:
 304          if (ctx->Polygon.OffsetLine!=state) {
 305             ctx->Polygon.OffsetLine = state;
 306             ctx->NewState |= NEW_POLYGON;
 307          }
 308          break;
 309       case GL_POLYGON_OFFSET_FILL:
 310       /*case GL_POLYGON_OFFSET_EXT:*/
 311          if (ctx->Polygon.OffsetFill!=state) {
 312             ctx->Polygon.OffsetFill = state;
 313             ctx->NewState |= NEW_POLYGON;
 314          }
 315          break;
 316       case GL_RESCALE_NORMAL_EXT:
 317          if (ctx->Transform.RescaleNormals != state) {
 318             ctx->Transform.RescaleNormals = state;
 319             ctx->NewState |= NEW_NORMAL_TRANSFORM|NEW_LIGHTING;
 320             ctx->Enabled ^= ENABLE_RESCALE;
 321          }
 322          break;
 323       case GL_SCISSOR_TEST:
 324          if (ctx->Scissor.Enabled!=state) {
 325             ctx->Scissor.Enabled = state;
 326             ctx->NewState |= NEW_RASTER_OPS;
 327          }
 328          break;
 329       case GL_SHARED_TEXTURE_PALETTE_EXT:
 330          ctx->Texture.SharedPalette = state;
 331          break;
 332       case GL_STENCIL_TEST:
 333          if (state && ctx->Visual->StencilBits==0) {
 334             gl_warning(ctx, "glEnable(GL_STENCIL_TEST) but no stencil buffer");
 335             return;
 336          }
 337          if (ctx->Stencil.Enabled!=state) {
 338             ctx->Stencil.Enabled = state;
 339             ctx->NewState |= NEW_RASTER_OPS;
 340             ctx->TriangleCaps ^= DD_STENCIL;
 341          }
 342          break;
 343       case GL_TEXTURE_1D:
 344          if (ctx->Visual->RGBAflag) {
 345             const GLuint curr = ctx->Texture.CurrentUnit;
 346             const GLuint flag = TEXTURE0_1D << (curr * 4);
 347             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 348             ctx->NewState |= NEW_TEXTURE_ENABLE;
 349             if (state) {
 350                texUnit->Enabled |= TEXTURE0_1D;
 351                ctx->Enabled |= flag;
 352             }
 353             else {
 354                texUnit->Enabled &= ~TEXTURE0_1D;
 355                ctx->Enabled &= ~flag;
 356             }
 357          }
 358          break;
 359       case GL_TEXTURE_2D:
 360          if (ctx->Visual->RGBAflag) {
 361             const GLuint curr = ctx->Texture.CurrentUnit;
 362             const GLuint flag = TEXTURE0_2D << (curr * 4);
 363             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 364             ctx->NewState |= NEW_TEXTURE_ENABLE;
 365             if (state) {
 366                texUnit->Enabled |= TEXTURE0_2D;
 367                ctx->Enabled |= flag;
 368             }
 369             else {
 370                texUnit->Enabled &= ~TEXTURE0_2D;
 371                ctx->Enabled &= ~flag;
 372             }
 373          }
 374          break;
 375       case GL_TEXTURE_3D:
 376          if (ctx->Visual->RGBAflag) {
 377             const GLuint curr = ctx->Texture.CurrentUnit;
 378             const GLuint flag = TEXTURE0_3D << (curr * 4);
 379             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 380             ctx->NewState |= NEW_TEXTURE_ENABLE;
 381             if (state) {
 382                texUnit->Enabled |= TEXTURE0_3D;
 383                ctx->Enabled |= flag;
 384             }
 385             else {
 386                texUnit->Enabled &= ~TEXTURE0_3D;
 387                ctx->Enabled &= ~flag;
 388             }
 389          }
 390          break;
 391       case GL_TEXTURE_GEN_Q:
 392          {
 393             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 394             if (state)
 395                texUnit->TexGenEnabled |= Q_BIT;
 396             else
 397                texUnit->TexGenEnabled &= ~Q_BIT;
 398             ctx->NewState |= NEW_TEXTURING;
 399          }
 400          break;
 401       case GL_TEXTURE_GEN_R:
 402          {
 403             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 404             if (state)
 405                texUnit->TexGenEnabled |= R_BIT;
 406             else
 407                texUnit->TexGenEnabled &= ~R_BIT;
 408             ctx->NewState |= NEW_TEXTURING;
 409          }
 410          break;
 411       case GL_TEXTURE_GEN_S:
 412          {
 413             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 414             if (state)
 415                texUnit->TexGenEnabled |= S_BIT;
 416             else
 417                texUnit->TexGenEnabled &= ~S_BIT;
 418             ctx->NewState |= NEW_TEXTURING;
 419          }
 420          break;
 421       case GL_TEXTURE_GEN_T:
 422          {
 423             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 424             if (state)
 425                texUnit->TexGenEnabled |= T_BIT;
 426             else
 427                texUnit->TexGenEnabled &= ~T_BIT;
 428             ctx->NewState |= NEW_TEXTURING;
 429          }
 430          break;
 431
 432       /*
 433        * CLIENT STATE!!!
 434        */
 435       case GL_VERTEX_ARRAY:
 436          ctx->Array.Vertex.Enabled = state;
 437          break;
 438       case GL_NORMAL_ARRAY:
 439          ctx->Array.Normal.Enabled = state;
 440          break;
 441       case GL_COLOR_ARRAY:
 442          ctx->Array.Color.Enabled = state;
 443          break;
 444       case GL_INDEX_ARRAY:
 445          ctx->Array.Index.Enabled = state;
 446          break;
 447       case GL_TEXTURE_COORD_ARRAY:
 448          ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled = state;
 449          break;
 450       case GL_EDGE_FLAG_ARRAY:
 451          ctx->Array.EdgeFlag.Enabled = state;
 452          break;
 453
 454       /* GL_HP_occlusion_test */
 455       case GL_OCCLUSION_TEST_HP:
 456          if (ctx->Extensions.HaveHpOcclusionTest) {
 457             ctx->Depth.OcclusionTest = state;
 458             if (state)
 459                ctx->OcclusionResult = ctx->OcclusionResultSaved;
 460             else
 461                ctx->OcclusionResultSaved = ctx->OcclusionResult;
 462             ctx->NewState |= NEW_RASTER_OPS;
 463          }
 464          else {
 465             gl_error( ctx, GL_INVALID_ENUM, state ? "glEnable": "glDisable" );
 466             return;
 467          }
 468          break;
 469
 470       /* GL_SGIS_pixel_texture */
 471       case GL_PIXEL_TEXTURE_SGIS:
 472          ctx->Pixel.PixelTextureEnabled = state;
 473          break;
 474
 475       /* GL_SGIX_pixel_texture */
 476       case GL_PIXEL_TEX_GEN_SGIX:
 477          ctx->Pixel.PixelTextureEnabled = state;
 478          break;
 479
 480       default:
 481          if (state) {
 482             gl_error( ctx, GL_INVALID_ENUM, "glEnable" );
 483          }
 484          else {
 485             gl_error( ctx, GL_INVALID_ENUM, "glDisable" );
 486          }
 487          return;
 488    }
 489
 490    if (ctx->Driver.Enable) {
 491       (*ctx->Driver.Enable)( ctx, cap, state );
 492    }
 493 }
 494
 495
 496
 497
 498 void
 499 _mesa_Enable( GLenum cap )
 500 {
 501    GET_CURRENT_CONTEXT(ctx);
 502    _mesa_set_enable( ctx, cap, GL_TRUE );
 503 }
 504
 505
 506
 507 void
 508 _mesa_Disable( GLenum cap )
 509 {
 510    GET_CURRENT_CONTEXT(ctx);
 511    _mesa_set_enable( ctx, cap, GL_FALSE );
 512 }
 513
 514
 515
 516 GLboolean
 517 _mesa_IsEnabled( GLenum cap )
 518 {
 519    GET_CURRENT_CONTEXT(ctx);
 520    switch (cap) {
 521       case GL_ALPHA_TEST:
 522          return ctx->Color.AlphaEnabled;
 523       case GL_AUTO_NORMAL:
 524          return ctx->Eval.AutoNormal;
 525       case GL_BLEND:
 526          return ctx->Color.BlendEnabled;
 527       case GL_CLIP_PLANE0:
 528       case GL_CLIP_PLANE1:
 529       case GL_CLIP_PLANE2:
 530       case GL_CLIP_PLANE3:
 531       case GL_CLIP_PLANE4:
 532       case GL_CLIP_PLANE5:
 533          return ctx->Transform.ClipEnabled[cap-GL_CLIP_PLANE0];
 534       case GL_COLOR_MATERIAL:
 535          return ctx->Light.ColorMaterialEnabled;
 536       case GL_CULL_FACE:
 537          return ctx->Polygon.CullFlag;
 538       case GL_DEPTH_TEST:
 539          return ctx->Depth.Test;
 540       case GL_DITHER:
 541          return ctx->Color.DitherFlag;
 542       case GL_FOG:
 543          return ctx->Fog.Enabled;
 544       case GL_LIGHTING:
 545          return ctx->Light.Enabled;
 546       case GL_LIGHT0:
 547       case GL_LIGHT1:
 548       case GL_LIGHT2:
 549       case GL_LIGHT3:
 550       case GL_LIGHT4:
 551       case GL_LIGHT5:
 552       case GL_LIGHT6:
 553       case GL_LIGHT7:
 554          return ctx->Light.Light[cap-GL_LIGHT0].Enabled;
 555       case GL_LINE_SMOOTH:
 556          return ctx->Line.SmoothFlag;
 557       case GL_LINE_STIPPLE:
 558          return ctx->Line.StippleFlag;
 559       case GL_INDEX_LOGIC_OP:
 560          return ctx->Color.IndexLogicOpEnabled;
 561       case GL_COLOR_LOGIC_OP:
 562          return ctx->Color.ColorLogicOpEnabled;
 563       case GL_MAP1_COLOR_4:
 564          return ctx->Eval.Map1Color4;
 565       case GL_MAP1_INDEX:
 566          return ctx->Eval.Map1Index;
 567       case GL_MAP1_NORMAL:
 568          return ctx->Eval.Map1Normal;
 569       case GL_MAP1_TEXTURE_COORD_1:
 570          return ctx->Eval.Map1TextureCoord1;
 571       case GL_MAP1_TEXTURE_COORD_2:
 572          return ctx->Eval.Map1TextureCoord2;
 573       case GL_MAP1_TEXTURE_COORD_3:
 574          return ctx->Eval.Map1TextureCoord3;
 575       case GL_MAP1_TEXTURE_COORD_4:
 576          return ctx->Eval.Map1TextureCoord4;
 577       case GL_MAP1_VERTEX_3:
 578          return ctx->Eval.Map1Vertex3;
 579       case GL_MAP1_VERTEX_4:
 580          return ctx->Eval.Map1Vertex4;
 581       case GL_MAP2_COLOR_4:
 582          return ctx->Eval.Map2Color4;
 583       case GL_MAP2_INDEX:
 584          return ctx->Eval.Map2Index;
 585       case GL_MAP2_NORMAL:
 586          return ctx->Eval.Map2Normal;
 587       case GL_MAP2_TEXTURE_COORD_1:
 588          return ctx->Eval.Map2TextureCoord1;
 589       case GL_MAP2_TEXTURE_COORD_2:
 590          return ctx->Eval.Map2TextureCoord2;
 591       case GL_MAP2_TEXTURE_COORD_3:
 592          return ctx->Eval.Map2TextureCoord3;
 593       case GL_MAP2_TEXTURE_COORD_4:
 594          return ctx->Eval.Map2TextureCoord4;
 595       case GL_MAP2_VERTEX_3:
 596          return ctx->Eval.Map2Vertex3;
 597       case GL_MAP2_VERTEX_4:
 598          return ctx->Eval.Map2Vertex4;
 599       case GL_NORMALIZE:
 600          return ctx->Transform.Normalize;
 601       case GL_POINT_SMOOTH:
 602          return ctx->Point.SmoothFlag;
 603       case GL_POLYGON_SMOOTH:
 604          return ctx->Polygon.SmoothFlag;
 605       case GL_POLYGON_STIPPLE:
 606          return ctx->Polygon.StippleFlag;
 607       case GL_POLYGON_OFFSET_POINT:
 608          return ctx->Polygon.OffsetPoint;
 609       case GL_POLYGON_OFFSET_LINE:
 610          return ctx->Polygon.OffsetLine;
 611       case GL_POLYGON_OFFSET_FILL:
 612       /*case GL_POLYGON_OFFSET_EXT:*/
 613          return ctx->Polygon.OffsetFill;
 614       case GL_RESCALE_NORMAL_EXT:
 615          return ctx->Transform.RescaleNormals;
 616       case GL_SCISSOR_TEST:
 617          return ctx->Scissor.Enabled;
 618       case GL_SHARED_TEXTURE_PALETTE_EXT:
 619          return ctx->Texture.SharedPalette;
 620       case GL_STENCIL_TEST:
 621          return ctx->Stencil.Enabled;
 622       case GL_TEXTURE_1D:
 623          {
 624             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 625             return (texUnit->Enabled & TEXTURE0_1D) ? GL_TRUE : GL_FALSE;
 626          }
 627       case GL_TEXTURE_2D:
 628          {
 629             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 630             return (texUnit->Enabled & TEXTURE0_2D) ? GL_TRUE : GL_FALSE;
 631          }
 632       case GL_TEXTURE_3D:
 633          {
 634             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 635             return (texUnit->Enabled & TEXTURE0_3D) ? GL_TRUE : GL_FALSE;
 636          }
 637       case GL_TEXTURE_GEN_Q:
 638          {
 639             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 640             return (texUnit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE;
 641          }
 642       case GL_TEXTURE_GEN_R:
 643          {
 644             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 645             return (texUnit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE;
 646          }
 647       case GL_TEXTURE_GEN_S:
 648          {
 649             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 650             return (texUnit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE;
 651          }
 652       case GL_TEXTURE_GEN_T:
 653          {
 654             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 655             return (texUnit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE;
 656          }
 657
 658       /*
 659        * CLIENT STATE!!!
 660        */
 661       case GL_VERTEX_ARRAY:
 662          return ctx->Array.Vertex.Enabled;
 663       case GL_NORMAL_ARRAY:
 664          return ctx->Array.Normal.Enabled;
 665       case GL_COLOR_ARRAY:
 666          return ctx->Array.Color.Enabled;
 667       case GL_INDEX_ARRAY:
 668          return ctx->Array.Index.Enabled;
 669       case GL_TEXTURE_COORD_ARRAY:
 670          return ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled;
 671       case GL_EDGE_FLAG_ARRAY:
 672          return ctx->Array.EdgeFlag.Enabled;
 673
 674       /* GL_HP_occlusion_test */
 675       case GL_OCCLUSION_TEST_HP:
 676          if (ctx->Extensions.HaveHpOcclusionTest) {
 677             return ctx->Depth.OcclusionTest;
 678          }
 679          else {
 680             gl_error( ctx, GL_INVALID_ENUM, "glIsEnabled" );
 681             return GL_FALSE;
 682          }
 683
 684       /* GL_SGIS_pixel_texture */
 685       case GL_PIXEL_TEXTURE_SGIS:
 686          return ctx->Pixel.PixelTextureEnabled;
 687          break;
 688
 689       /* GL_SGIX_pixel_texture */
 690       case GL_PIXEL_TEX_GEN_SGIX:
 691          return ctx->Pixel.PixelTextureEnabled;
 692          break;
 693
 694       default:
 695          gl_error( ctx, GL_INVALID_ENUM, "glIsEnabled" );
 696          return GL_FALSE;
 697    }
 698 }
 699
 700
 701
 702
 703 static void
 704 client_state( GLcontext *ctx, GLenum cap, GLboolean state )
 705 {
 706    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx,
 707                                        (state
 708                                         ? "glEnableClientState"
 709                                         : "glDisableClientState") );
 710
 711    switch (cap) {
 712       case GL_VERTEX_ARRAY:
 713          ctx->Array.Vertex.Enabled = state;
 714          break;
 715       case GL_NORMAL_ARRAY:
 716          ctx->Array.Normal.Enabled = state;
 717          break;
 718       case GL_COLOR_ARRAY:
 719          ctx->Array.Color.Enabled = state;
 720          break;
 721       case GL_INDEX_ARRAY:
 722          ctx->Array.Index.Enabled = state;
 723          break;
 724       case GL_TEXTURE_COORD_ARRAY:
 725          ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled = state;
 726          break;
 727       case GL_EDGE_FLAG_ARRAY:
 728          ctx->Array.EdgeFlag.Enabled = state;
 729          break;
 730       default:
 731          gl_error( ctx, GL_INVALID_ENUM, "glEnable/DisableClientState" );
 732    }
 733
 734    ctx->NewState |= NEW_CLIENT_STATE;
 735 }
 736
 737
 738
 739 void
 740 _mesa_EnableClientState( GLenum cap )
 741 {
 742    GET_CURRENT_CONTEXT(ctx);
 743    client_state( ctx, cap, GL_TRUE );
 744 }
 745
 746
 747
 748 void
 749 _mesa_DisableClientState( GLenum cap )
 750 {
 751    GET_CURRENT_CONTEXT(ctx);
 752    client_state( ctx, cap, GL_FALSE );
 753 }
 754