src/mesa/main/enable.c

   1 /* $Id: enable.c,v 1.20 2000/05/22 16:33:21 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_HISTOGRAM:
 158          ctx->Pixel.HistogramEnabled = state;
 159          break;
 160       case GL_LIGHT0:
 161       case GL_LIGHT1:
 162       case GL_LIGHT2:
 163       case GL_LIGHT3:
 164       case GL_LIGHT4:
 165       case GL_LIGHT5:
 166       case GL_LIGHT6:
 167       case GL_LIGHT7:
 168          if (ctx->Light.Light[cap-GL_LIGHT0].Enabled != state)
 169          {
 170             ctx->Light.Light[cap-GL_LIGHT0].Enabled = state;
 171
 172             if (state) {
 173                insert_at_tail(&ctx->Light.EnabledList,
 174                               &ctx->Light.Light[cap-GL_LIGHT0]);
 175                if (ctx->Light.Enabled)
 176                   ctx->Enabled |= ENABLE_LIGHT;
 177             } else {
 178                remove_from_list(&ctx->Light.Light[cap-GL_LIGHT0]);
 179                if (is_empty_list(&ctx->Light.EnabledList))
 180                   ctx->Enabled &= ~ENABLE_LIGHT;
 181             }
 182
 183             ctx->NewState |= NEW_LIGHTING;
 184          }
 185          break;
 186       case GL_LIGHTING:
 187          if (ctx->Light.Enabled!=state) {
 188             ctx->Light.Enabled = state;
 189             ctx->Enabled &= ~ENABLE_LIGHT;
 190             if (state)
 191                ctx->Enabled |= ENABLE_LIGHT;
 192             ctx->NewState |= NEW_LIGHTING;
 193          }
 194          break;
 195       case GL_LINE_SMOOTH:
 196          if (ctx->Line.SmoothFlag!=state) {
 197             ctx->Line.SmoothFlag = state;
 198             ctx->TriangleCaps ^= DD_LINE_SMOOTH;
 199             ctx->NewState |= NEW_RASTER_OPS;
 200          }
 201          break;
 202       case GL_LINE_STIPPLE:
 203          if (ctx->Line.StippleFlag!=state) {
 204             ctx->Line.StippleFlag = state;
 205             ctx->TriangleCaps ^= DD_LINE_STIPPLE;
 206             ctx->NewState |= NEW_RASTER_OPS;
 207          }
 208          break;
 209       case GL_INDEX_LOGIC_OP:
 210          if (ctx->Color.IndexLogicOpEnabled!=state) {
 211             ctx->Color.IndexLogicOpEnabled = state;
 212             ctx->NewState |= NEW_RASTER_OPS;
 213          }
 214          break;
 215       case GL_COLOR_LOGIC_OP:
 216          if (ctx->Color.ColorLogicOpEnabled!=state) {
 217             ctx->Color.ColorLogicOpEnabled = state;
 218             ctx->NewState |= NEW_RASTER_OPS;
 219          }
 220          break;
 221       case GL_MAP1_COLOR_4:
 222          ctx->Eval.Map1Color4 = state;
 223          break;
 224       case GL_MAP1_INDEX:
 225          ctx->Eval.Map1Index = state;
 226          break;
 227       case GL_MAP1_NORMAL:
 228          ctx->Eval.Map1Normal = state;
 229          break;
 230       case GL_MAP1_TEXTURE_COORD_1:
 231          ctx->Eval.Map1TextureCoord1 = state;
 232          break;
 233       case GL_MAP1_TEXTURE_COORD_2:
 234          ctx->Eval.Map1TextureCoord2 = state;
 235          break;
 236       case GL_MAP1_TEXTURE_COORD_3:
 237          ctx->Eval.Map1TextureCoord3 = state;
 238          break;
 239       case GL_MAP1_TEXTURE_COORD_4:
 240          ctx->Eval.Map1TextureCoord4 = state;
 241          break;
 242       case GL_MAP1_VERTEX_3:
 243          ctx->Eval.Map1Vertex3 = state;
 244          break;
 245       case GL_MAP1_VERTEX_4:
 246          ctx->Eval.Map1Vertex4 = state;
 247          break;
 248       case GL_MAP2_COLOR_4:
 249          ctx->Eval.Map2Color4 = state;
 250          break;
 251       case GL_MAP2_INDEX:
 252          ctx->Eval.Map2Index = state;
 253          break;
 254       case GL_MAP2_NORMAL:
 255          ctx->Eval.Map2Normal = state;
 256          break;
 257       case GL_MAP2_TEXTURE_COORD_1:
 258          ctx->Eval.Map2TextureCoord1 = state;
 259          break;
 260       case GL_MAP2_TEXTURE_COORD_2:
 261          ctx->Eval.Map2TextureCoord2 = state;
 262          break;
 263       case GL_MAP2_TEXTURE_COORD_3:
 264          ctx->Eval.Map2TextureCoord3 = state;
 265          break;
 266       case GL_MAP2_TEXTURE_COORD_4:
 267          ctx->Eval.Map2TextureCoord4 = state;
 268          break;
 269       case GL_MAP2_VERTEX_3:
 270          ctx->Eval.Map2Vertex3 = state;
 271          break;
 272       case GL_MAP2_VERTEX_4:
 273          ctx->Eval.Map2Vertex4 = state;
 274          break;
 275       case GL_MINMAX:
 276          ctx->Pixel.MinMaxEnabled = state;
 277          break;
 278       case GL_NORMALIZE:
 279          if (ctx->Transform.Normalize != state) {
 280             ctx->Transform.Normalize = state;
 281             ctx->NewState |= NEW_NORMAL_TRANSFORM|NEW_LIGHTING;
 282             ctx->Enabled ^= ENABLE_NORMALIZE;
 283          }
 284          break;
 285       case GL_POINT_SMOOTH:
 286          if (ctx->Point.SmoothFlag!=state) {
 287             ctx->Point.SmoothFlag = state;
 288             ctx->NewState |= NEW_RASTER_OPS;
 289          }
 290          break;
 291       case GL_POLYGON_SMOOTH:
 292          if (ctx->Polygon.SmoothFlag!=state) {
 293             ctx->Polygon.SmoothFlag = state;
 294             ctx->NewState |= NEW_RASTER_OPS;
 295          }
 296          break;
 297       case GL_POLYGON_STIPPLE:
 298          if (ctx->Polygon.StippleFlag!=state) {
 299             ctx->Polygon.StippleFlag = state;
 300             ctx->TriangleCaps ^= DD_TRI_STIPPLE;
 301             ctx->NewState |= NEW_RASTER_OPS;
 302          }
 303          break;
 304       case GL_POLYGON_OFFSET_POINT:
 305          if (ctx->Polygon.OffsetPoint!=state) {
 306             ctx->Polygon.OffsetPoint = state;
 307             ctx->NewState |= NEW_POLYGON;
 308          }
 309          break;
 310       case GL_POLYGON_OFFSET_LINE:
 311          if (ctx->Polygon.OffsetLine!=state) {
 312             ctx->Polygon.OffsetLine = state;
 313             ctx->NewState |= NEW_POLYGON;
 314          }
 315          break;
 316       case GL_POLYGON_OFFSET_FILL:
 317       /*case GL_POLYGON_OFFSET_EXT:*/
 318          if (ctx->Polygon.OffsetFill!=state) {
 319             ctx->Polygon.OffsetFill = state;
 320             ctx->NewState |= NEW_POLYGON;
 321          }
 322          break;
 323       case GL_RESCALE_NORMAL_EXT:
 324          if (ctx->Transform.RescaleNormals != state) {
 325             ctx->Transform.RescaleNormals = state;
 326             ctx->NewState |= NEW_NORMAL_TRANSFORM|NEW_LIGHTING;
 327             ctx->Enabled ^= ENABLE_RESCALE;
 328          }
 329          break;
 330       case GL_SCISSOR_TEST:
 331          if (ctx->Scissor.Enabled!=state) {
 332             ctx->Scissor.Enabled = state;
 333             ctx->NewState |= NEW_RASTER_OPS;
 334          }
 335          break;
 336       case GL_SHARED_TEXTURE_PALETTE_EXT:
 337          ctx->Texture.SharedPalette = state;
 338          break;
 339       case GL_STENCIL_TEST:
 340          if (state && ctx->Visual->StencilBits==0) {
 341             gl_warning(ctx, "glEnable(GL_STENCIL_TEST) but no stencil buffer");
 342             return;
 343          }
 344          if (ctx->Stencil.Enabled!=state) {
 345             ctx->Stencil.Enabled = state;
 346             ctx->NewState |= NEW_RASTER_OPS;
 347             ctx->TriangleCaps ^= DD_STENCIL;
 348          }
 349          break;
 350       case GL_TEXTURE_1D:
 351          if (ctx->Visual->RGBAflag) {
 352             const GLuint curr = ctx->Texture.CurrentUnit;
 353             const GLuint flag = TEXTURE0_1D << (curr * 4);
 354             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 355             ctx->NewState |= NEW_TEXTURE_ENABLE;
 356             if (state) {
 357                texUnit->Enabled |= TEXTURE0_1D;
 358                ctx->Enabled |= flag;
 359             }
 360             else {
 361                texUnit->Enabled &= ~TEXTURE0_1D;
 362                ctx->Enabled &= ~flag;
 363             }
 364          }
 365          break;
 366       case GL_TEXTURE_2D:
 367          if (ctx->Visual->RGBAflag) {
 368             const GLuint curr = ctx->Texture.CurrentUnit;
 369             const GLuint flag = TEXTURE0_2D << (curr * 4);
 370             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 371             ctx->NewState |= NEW_TEXTURE_ENABLE;
 372             if (state) {
 373                texUnit->Enabled |= TEXTURE0_2D;
 374                ctx->Enabled |= flag;
 375             }
 376             else {
 377                texUnit->Enabled &= ~TEXTURE0_2D;
 378                ctx->Enabled &= ~flag;
 379             }
 380          }
 381          break;
 382       case GL_TEXTURE_3D:
 383          if (ctx->Visual->RGBAflag) {
 384             const GLuint curr = ctx->Texture.CurrentUnit;
 385             const GLuint flag = TEXTURE0_3D << (curr * 4);
 386             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 387             ctx->NewState |= NEW_TEXTURE_ENABLE;
 388             if (state) {
 389                texUnit->Enabled |= TEXTURE0_3D;
 390                ctx->Enabled |= flag;
 391             }
 392             else {
 393                texUnit->Enabled &= ~TEXTURE0_3D;
 394                ctx->Enabled &= ~flag;
 395             }
 396          }
 397          break;
 398       case GL_TEXTURE_GEN_Q:
 399          {
 400             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 401             if (state)
 402                texUnit->TexGenEnabled |= Q_BIT;
 403             else
 404                texUnit->TexGenEnabled &= ~Q_BIT;
 405             ctx->NewState |= NEW_TEXTURING;
 406          }
 407          break;
 408       case GL_TEXTURE_GEN_R:
 409          {
 410             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 411             if (state)
 412                texUnit->TexGenEnabled |= R_BIT;
 413             else
 414                texUnit->TexGenEnabled &= ~R_BIT;
 415             ctx->NewState |= NEW_TEXTURING;
 416          }
 417          break;
 418       case GL_TEXTURE_GEN_S:
 419          {
 420             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 421             if (state)
 422                texUnit->TexGenEnabled |= S_BIT;
 423             else
 424                texUnit->TexGenEnabled &= ~S_BIT;
 425             ctx->NewState |= NEW_TEXTURING;
 426          }
 427          break;
 428       case GL_TEXTURE_GEN_T:
 429          {
 430             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 431             if (state)
 432                texUnit->TexGenEnabled |= T_BIT;
 433             else
 434                texUnit->TexGenEnabled &= ~T_BIT;
 435             ctx->NewState |= NEW_TEXTURING;
 436          }
 437          break;
 438
 439       /*
 440        * CLIENT STATE!!!
 441        */
 442       case GL_VERTEX_ARRAY:
 443          ctx->Array.Vertex.Enabled = state;
 444          break;
 445       case GL_NORMAL_ARRAY:
 446          ctx->Array.Normal.Enabled = state;
 447          break;
 448       case GL_COLOR_ARRAY:
 449          ctx->Array.Color.Enabled = state;
 450          break;
 451       case GL_INDEX_ARRAY:
 452          ctx->Array.Index.Enabled = state;
 453          break;
 454       case GL_TEXTURE_COORD_ARRAY:
 455          ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled = state;
 456          break;
 457       case GL_EDGE_FLAG_ARRAY:
 458          ctx->Array.EdgeFlag.Enabled = state;
 459          break;
 460
 461       /* GL_HP_occlusion_test */
 462       case GL_OCCLUSION_TEST_HP:
 463          if (ctx->Extensions.HaveHpOcclusionTest) {
 464             ctx->Depth.OcclusionTest = state;
 465             if (state)
 466                ctx->OcclusionResult = ctx->OcclusionResultSaved;
 467             else
 468                ctx->OcclusionResultSaved = ctx->OcclusionResult;
 469             ctx->NewState |= NEW_RASTER_OPS;
 470          }
 471          else {
 472             gl_error( ctx, GL_INVALID_ENUM, state ? "glEnable": "glDisable" );
 473             return;
 474          }
 475          break;
 476
 477       /* GL_SGIS_pixel_texture */
 478       case GL_PIXEL_TEXTURE_SGIS:
 479          ctx->Pixel.PixelTextureEnabled = state;
 480          break;
 481
 482       /* GL_SGIX_pixel_texture */
 483       case GL_PIXEL_TEX_GEN_SGIX:
 484          ctx->Pixel.PixelTextureEnabled = state;
 485          break;
 486
 487       /* GL_SGI_color_table */
 488       case GL_COLOR_TABLE_SGI:
 489          ctx->Pixel.ColorTableEnabled = state;
 490          break;
 491       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 492          ctx->Pixel.PostConvolutionColorTableEnabled = state;
 493          break;
 494       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 495          ctx->Pixel.PostColorMatrixColorTableEnabled = state;
 496          break;
 497
 498       /* GL_EXT_convolution */
 499       case GL_CONVOLUTION_1D:
 500          ctx->Pixel.Convolution1DEnabled = state;
 501          break;
 502       case GL_CONVOLUTION_2D:
 503          ctx->Pixel.Convolution2DEnabled = state;
 504          break;
 505       case GL_SEPARABLE_2D:
 506          ctx->Pixel.Separable2DEnabled = state;
 507          break;
 508
 509       /* GL_ARB_texture_cube_map */
 510       case GL_TEXTURE_CUBE_MAP_ARB:
 511 #if 0
 512          if (ctx->Visual->RGBAflag) {
 513             const GLuint curr = ctx->Texture.CurrentUnit;
 514             const GLuint flag = TEXTURE0_CUBE << (curr * 4);
 515             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 516             ctx->NewState |= NEW_TEXTURE_ENABLE;
 517             if (state) {
 518                texUnit->Enabled |= TEXTURE0_2D;
 519                ctx->Enabled |= flag;
 520             }
 521             else {
 522                texUnit->Enabled &= ~TEXTURE0_2D;
 523                ctx->Enabled &= ~flag;
 524             }
 525          }
 526          break;
 527 #endif
 528
 529       default:
 530          if (state) {
 531             gl_error( ctx, GL_INVALID_ENUM, "glEnable" );
 532          }
 533          else {
 534             gl_error( ctx, GL_INVALID_ENUM, "glDisable" );
 535          }
 536          return;
 537    }
 538
 539    if (ctx->Driver.Enable) {
 540       (*ctx->Driver.Enable)( ctx, cap, state );
 541    }
 542 }
 543
 544
 545
 546
 547 void
 548 _mesa_Enable( GLenum cap )
 549 {
 550    GET_CURRENT_CONTEXT(ctx);
 551    _mesa_set_enable( ctx, cap, GL_TRUE );
 552 }
 553
 554
 555
 556 void
 557 _mesa_Disable( GLenum cap )
 558 {
 559    GET_CURRENT_CONTEXT(ctx);
 560    _mesa_set_enable( ctx, cap, GL_FALSE );
 561 }
 562
 563
 564
 565 GLboolean
 566 _mesa_IsEnabled( GLenum cap )
 567 {
 568    GET_CURRENT_CONTEXT(ctx);
 569    switch (cap) {
 570       case GL_ALPHA_TEST:
 571          return ctx->Color.AlphaEnabled;
 572       case GL_AUTO_NORMAL:
 573          return ctx->Eval.AutoNormal;
 574       case GL_BLEND:
 575          return ctx->Color.BlendEnabled;
 576       case GL_CLIP_PLANE0:
 577       case GL_CLIP_PLANE1:
 578       case GL_CLIP_PLANE2:
 579       case GL_CLIP_PLANE3:
 580       case GL_CLIP_PLANE4:
 581       case GL_CLIP_PLANE5:
 582          return ctx->Transform.ClipEnabled[cap-GL_CLIP_PLANE0];
 583       case GL_COLOR_MATERIAL:
 584          return ctx->Light.ColorMaterialEnabled;
 585       case GL_CULL_FACE:
 586          return ctx->Polygon.CullFlag;
 587       case GL_DEPTH_TEST:
 588          return ctx->Depth.Test;
 589       case GL_DITHER:
 590          return ctx->Color.DitherFlag;
 591       case GL_FOG:
 592          return ctx->Fog.Enabled;
 593       case GL_HISTOGRAM:
 594          return ctx->Pixel.HistogramEnabled;
 595       case GL_LIGHTING:
 596          return ctx->Light.Enabled;
 597       case GL_LIGHT0:
 598       case GL_LIGHT1:
 599       case GL_LIGHT2:
 600       case GL_LIGHT3:
 601       case GL_LIGHT4:
 602       case GL_LIGHT5:
 603       case GL_LIGHT6:
 604       case GL_LIGHT7:
 605          return ctx->Light.Light[cap-GL_LIGHT0].Enabled;
 606       case GL_LINE_SMOOTH:
 607          return ctx->Line.SmoothFlag;
 608       case GL_LINE_STIPPLE:
 609          return ctx->Line.StippleFlag;
 610       case GL_INDEX_LOGIC_OP:
 611          return ctx->Color.IndexLogicOpEnabled;
 612       case GL_COLOR_LOGIC_OP:
 613          return ctx->Color.ColorLogicOpEnabled;
 614       case GL_MAP1_COLOR_4:
 615          return ctx->Eval.Map1Color4;
 616       case GL_MAP1_INDEX:
 617          return ctx->Eval.Map1Index;
 618       case GL_MAP1_NORMAL:
 619          return ctx->Eval.Map1Normal;
 620       case GL_MAP1_TEXTURE_COORD_1:
 621          return ctx->Eval.Map1TextureCoord1;
 622       case GL_MAP1_TEXTURE_COORD_2:
 623          return ctx->Eval.Map1TextureCoord2;
 624       case GL_MAP1_TEXTURE_COORD_3:
 625          return ctx->Eval.Map1TextureCoord3;
 626       case GL_MAP1_TEXTURE_COORD_4:
 627          return ctx->Eval.Map1TextureCoord4;
 628       case GL_MAP1_VERTEX_3:
 629          return ctx->Eval.Map1Vertex3;
 630       case GL_MAP1_VERTEX_4:
 631          return ctx->Eval.Map1Vertex4;
 632       case GL_MAP2_COLOR_4:
 633          return ctx->Eval.Map2Color4;
 634       case GL_MAP2_INDEX:
 635          return ctx->Eval.Map2Index;
 636       case GL_MAP2_NORMAL:
 637          return ctx->Eval.Map2Normal;
 638       case GL_MAP2_TEXTURE_COORD_1:
 639          return ctx->Eval.Map2TextureCoord1;
 640       case GL_MAP2_TEXTURE_COORD_2:
 641          return ctx->Eval.Map2TextureCoord2;
 642       case GL_MAP2_TEXTURE_COORD_3:
 643          return ctx->Eval.Map2TextureCoord3;
 644       case GL_MAP2_TEXTURE_COORD_4:
 645          return ctx->Eval.Map2TextureCoord4;
 646       case GL_MAP2_VERTEX_3:
 647          return ctx->Eval.Map2Vertex3;
 648       case GL_MAP2_VERTEX_4:
 649          return ctx->Eval.Map2Vertex4;
 650       case GL_MINMAX:
 651          return ctx->Pixel.MinMaxEnabled;
 652       case GL_NORMALIZE:
 653          return ctx->Transform.Normalize;
 654       case GL_POINT_SMOOTH:
 655          return ctx->Point.SmoothFlag;
 656       case GL_POLYGON_SMOOTH:
 657          return ctx->Polygon.SmoothFlag;
 658       case GL_POLYGON_STIPPLE:
 659          return ctx->Polygon.StippleFlag;
 660       case GL_POLYGON_OFFSET_POINT:
 661          return ctx->Polygon.OffsetPoint;
 662       case GL_POLYGON_OFFSET_LINE:
 663          return ctx->Polygon.OffsetLine;
 664       case GL_POLYGON_OFFSET_FILL:
 665       /*case GL_POLYGON_OFFSET_EXT:*/
 666          return ctx->Polygon.OffsetFill;
 667       case GL_RESCALE_NORMAL_EXT:
 668          return ctx->Transform.RescaleNormals;
 669       case GL_SCISSOR_TEST:
 670          return ctx->Scissor.Enabled;
 671       case GL_SHARED_TEXTURE_PALETTE_EXT:
 672          return ctx->Texture.SharedPalette;
 673       case GL_STENCIL_TEST:
 674          return ctx->Stencil.Enabled;
 675       case GL_TEXTURE_1D:
 676          {
 677             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 678             return (texUnit->Enabled & TEXTURE0_1D) ? GL_TRUE : GL_FALSE;
 679          }
 680       case GL_TEXTURE_2D:
 681          {
 682             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 683             return (texUnit->Enabled & TEXTURE0_2D) ? GL_TRUE : GL_FALSE;
 684          }
 685       case GL_TEXTURE_3D:
 686          {
 687             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 688             return (texUnit->Enabled & TEXTURE0_3D) ? GL_TRUE : GL_FALSE;
 689          }
 690       case GL_TEXTURE_GEN_Q:
 691          {
 692             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 693             return (texUnit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE;
 694          }
 695       case GL_TEXTURE_GEN_R:
 696          {
 697             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 698             return (texUnit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE;
 699          }
 700       case GL_TEXTURE_GEN_S:
 701          {
 702             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 703             return (texUnit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE;
 704          }
 705       case GL_TEXTURE_GEN_T:
 706          {
 707             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 708             return (texUnit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE;
 709          }
 710
 711       /*
 712        * CLIENT STATE!!!
 713        */
 714       case GL_VERTEX_ARRAY:
 715          return ctx->Array.Vertex.Enabled;
 716       case GL_NORMAL_ARRAY:
 717          return ctx->Array.Normal.Enabled;
 718       case GL_COLOR_ARRAY:
 719          return ctx->Array.Color.Enabled;
 720       case GL_INDEX_ARRAY:
 721          return ctx->Array.Index.Enabled;
 722       case GL_TEXTURE_COORD_ARRAY:
 723          return ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled;
 724       case GL_EDGE_FLAG_ARRAY:
 725          return ctx->Array.EdgeFlag.Enabled;
 726
 727       /* GL_HP_occlusion_test */
 728       case GL_OCCLUSION_TEST_HP:
 729          if (ctx->Extensions.HaveHpOcclusionTest) {
 730             return ctx->Depth.OcclusionTest;
 731          }
 732          else {
 733             gl_error( ctx, GL_INVALID_ENUM, "glIsEnabled" );
 734             return GL_FALSE;
 735          }
 736
 737       /* GL_SGIS_pixel_texture */
 738       case GL_PIXEL_TEXTURE_SGIS:
 739          return ctx->Pixel.PixelTextureEnabled;
 740
 741       /* GL_SGIX_pixel_texture */
 742       case GL_PIXEL_TEX_GEN_SGIX:
 743          return ctx->Pixel.PixelTextureEnabled;
 744
 745       /* GL_SGI_color_table */
 746       case GL_COLOR_TABLE_SGI:
 747          return ctx->Pixel.ColorTableEnabled;
 748       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 749          return ctx->Pixel.PostConvolutionColorTableEnabled;
 750       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 751          return ctx->Pixel.PostColorMatrixColorTableEnabled;
 752
 753       /* GL_EXT_convolution */
 754       case GL_CONVOLUTION_1D:
 755          return ctx->Pixel.Convolution1DEnabled;
 756       case GL_CONVOLUTION_2D:
 757          return ctx->Pixel.Convolution2DEnabled;
 758       case GL_SEPARABLE_2D:
 759          return ctx->Pixel.Separable2DEnabled;
 760
 761       /* GL_ARB_texture_cube_map */
 762       case GL_TEXTURE_CUBE_MAP_ARB:
 763 #if 0
 764          if (ctx->Visual->RGBAflag) {
 765             const GLuint curr = ctx->Texture.CurrentUnit;
 766             const GLuint flag = TEXTURE0_CUBE << (curr * 4);
 767             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 768             ctx->NewState |= NEW_TEXTURE_ENABLE;
 769             if (state) {
 770                texUnit->Enabled |= TEXTURE0_2D;
 771                ctx->Enabled |= flag;
 772             }
 773             else {
 774                texUnit->Enabled &= ~TEXTURE0_2D;
 775                ctx->Enabled &= ~flag;
 776             }
 777          }
 778          break;
 779 #endif
 780
 781       default:
 782          gl_error( ctx, GL_INVALID_ENUM, "glIsEnabled" );
 783          return GL_FALSE;
 784    }
 785 }
 786
 787
 788
 789
 790 static void
 791 client_state( GLcontext *ctx, GLenum cap, GLboolean state )
 792 {
 793    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx,
 794                                        (state
 795                                         ? "glEnableClientState"
 796                                         : "glDisableClientState") );
 797
 798    switch (cap) {
 799       case GL_VERTEX_ARRAY:
 800          ctx->Array.Vertex.Enabled = state;
 801          break;
 802       case GL_NORMAL_ARRAY:
 803          ctx->Array.Normal.Enabled = state;
 804          break;
 805       case GL_COLOR_ARRAY:
 806          ctx->Array.Color.Enabled = state;
 807          break;
 808       case GL_INDEX_ARRAY:
 809          ctx->Array.Index.Enabled = state;
 810          break;
 811       case GL_TEXTURE_COORD_ARRAY:
 812          ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled = state;
 813          break;
 814       case GL_EDGE_FLAG_ARRAY:
 815          ctx->Array.EdgeFlag.Enabled = state;
 816          break;
 817       default:
 818          gl_error( ctx, GL_INVALID_ENUM, "glEnable/DisableClientState" );
 819    }
 820
 821    ctx->NewState |= NEW_CLIENT_STATE;
 822 }
 823
 824
 825
 826 void
 827 _mesa_EnableClientState( GLenum cap )
 828 {
 829    GET_CURRENT_CONTEXT(ctx);
 830    client_state( ctx, cap, GL_TRUE );
 831 }
 832
 833
 834
 835 void
 836 _mesa_DisableClientState( GLenum cap )
 837 {
 838    GET_CURRENT_CONTEXT(ctx);
 839    client_state( ctx, cap, GL_FALSE );
 840 }
 841