src/mesa/main/enable.c

   1 /* $Id: enable.c,v 1.21 2000/05/23 15:17:12 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 (ctx->Extensions.HaveTextureCubeMap) {
 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_CUBE;
 519                   ctx->Enabled |= flag;
 520                }
 521                else {
 522                   texUnit->Enabled &= ~TEXTURE0_CUBE;
 523                   ctx->Enabled &= ~flag;
 524                }
 525             }
 526          }
 527          else {
 528             if (state)
 529                gl_error(ctx, GL_INVALID_ENUM, "glEnable");
 530             else
 531                gl_error(ctx, GL_INVALID_ENUM, "glDisable");
 532             return;
 533          }
 534          break;
 535
 536       default:
 537          if (state) {
 538             gl_error( ctx, GL_INVALID_ENUM, "glEnable" );
 539          }
 540          else {
 541             gl_error( ctx, GL_INVALID_ENUM, "glDisable" );
 542          }
 543          return;
 544    }
 545
 546    if (ctx->Driver.Enable) {
 547       (*ctx->Driver.Enable)( ctx, cap, state );
 548    }
 549 }
 550
 551
 552
 553
 554 void
 555 _mesa_Enable( GLenum cap )
 556 {
 557    GET_CURRENT_CONTEXT(ctx);
 558    _mesa_set_enable( ctx, cap, GL_TRUE );
 559 }
 560
 561
 562
 563 void
 564 _mesa_Disable( GLenum cap )
 565 {
 566    GET_CURRENT_CONTEXT(ctx);
 567    _mesa_set_enable( ctx, cap, GL_FALSE );
 568 }
 569
 570
 571
 572 GLboolean
 573 _mesa_IsEnabled( GLenum cap )
 574 {
 575    GET_CURRENT_CONTEXT(ctx);
 576    switch (cap) {
 577       case GL_ALPHA_TEST:
 578          return ctx->Color.AlphaEnabled;
 579       case GL_AUTO_NORMAL:
 580          return ctx->Eval.AutoNormal;
 581       case GL_BLEND:
 582          return ctx->Color.BlendEnabled;
 583       case GL_CLIP_PLANE0:
 584       case GL_CLIP_PLANE1:
 585       case GL_CLIP_PLANE2:
 586       case GL_CLIP_PLANE3:
 587       case GL_CLIP_PLANE4:
 588       case GL_CLIP_PLANE5:
 589          return ctx->Transform.ClipEnabled[cap-GL_CLIP_PLANE0];
 590       case GL_COLOR_MATERIAL:
 591          return ctx->Light.ColorMaterialEnabled;
 592       case GL_CULL_FACE:
 593          return ctx->Polygon.CullFlag;
 594       case GL_DEPTH_TEST:
 595          return ctx->Depth.Test;
 596       case GL_DITHER:
 597          return ctx->Color.DitherFlag;
 598       case GL_FOG:
 599          return ctx->Fog.Enabled;
 600       case GL_HISTOGRAM:
 601          return ctx->Pixel.HistogramEnabled;
 602       case GL_LIGHTING:
 603          return ctx->Light.Enabled;
 604       case GL_LIGHT0:
 605       case GL_LIGHT1:
 606       case GL_LIGHT2:
 607       case GL_LIGHT3:
 608       case GL_LIGHT4:
 609       case GL_LIGHT5:
 610       case GL_LIGHT6:
 611       case GL_LIGHT7:
 612          return ctx->Light.Light[cap-GL_LIGHT0].Enabled;
 613       case GL_LINE_SMOOTH:
 614          return ctx->Line.SmoothFlag;
 615       case GL_LINE_STIPPLE:
 616          return ctx->Line.StippleFlag;
 617       case GL_INDEX_LOGIC_OP:
 618          return ctx->Color.IndexLogicOpEnabled;
 619       case GL_COLOR_LOGIC_OP:
 620          return ctx->Color.ColorLogicOpEnabled;
 621       case GL_MAP1_COLOR_4:
 622          return ctx->Eval.Map1Color4;
 623       case GL_MAP1_INDEX:
 624          return ctx->Eval.Map1Index;
 625       case GL_MAP1_NORMAL:
 626          return ctx->Eval.Map1Normal;
 627       case GL_MAP1_TEXTURE_COORD_1:
 628          return ctx->Eval.Map1TextureCoord1;
 629       case GL_MAP1_TEXTURE_COORD_2:
 630          return ctx->Eval.Map1TextureCoord2;
 631       case GL_MAP1_TEXTURE_COORD_3:
 632          return ctx->Eval.Map1TextureCoord3;
 633       case GL_MAP1_TEXTURE_COORD_4:
 634          return ctx->Eval.Map1TextureCoord4;
 635       case GL_MAP1_VERTEX_3:
 636          return ctx->Eval.Map1Vertex3;
 637       case GL_MAP1_VERTEX_4:
 638          return ctx->Eval.Map1Vertex4;
 639       case GL_MAP2_COLOR_4:
 640          return ctx->Eval.Map2Color4;
 641       case GL_MAP2_INDEX:
 642          return ctx->Eval.Map2Index;
 643       case GL_MAP2_NORMAL:
 644          return ctx->Eval.Map2Normal;
 645       case GL_MAP2_TEXTURE_COORD_1:
 646          return ctx->Eval.Map2TextureCoord1;
 647       case GL_MAP2_TEXTURE_COORD_2:
 648          return ctx->Eval.Map2TextureCoord2;
 649       case GL_MAP2_TEXTURE_COORD_3:
 650          return ctx->Eval.Map2TextureCoord3;
 651       case GL_MAP2_TEXTURE_COORD_4:
 652          return ctx->Eval.Map2TextureCoord4;
 653       case GL_MAP2_VERTEX_3:
 654          return ctx->Eval.Map2Vertex3;
 655       case GL_MAP2_VERTEX_4:
 656          return ctx->Eval.Map2Vertex4;
 657       case GL_MINMAX:
 658          return ctx->Pixel.MinMaxEnabled;
 659       case GL_NORMALIZE:
 660          return ctx->Transform.Normalize;
 661       case GL_POINT_SMOOTH:
 662          return ctx->Point.SmoothFlag;
 663       case GL_POLYGON_SMOOTH:
 664          return ctx->Polygon.SmoothFlag;
 665       case GL_POLYGON_STIPPLE:
 666          return ctx->Polygon.StippleFlag;
 667       case GL_POLYGON_OFFSET_POINT:
 668          return ctx->Polygon.OffsetPoint;
 669       case GL_POLYGON_OFFSET_LINE:
 670          return ctx->Polygon.OffsetLine;
 671       case GL_POLYGON_OFFSET_FILL:
 672       /*case GL_POLYGON_OFFSET_EXT:*/
 673          return ctx->Polygon.OffsetFill;
 674       case GL_RESCALE_NORMAL_EXT:
 675          return ctx->Transform.RescaleNormals;
 676       case GL_SCISSOR_TEST:
 677          return ctx->Scissor.Enabled;
 678       case GL_SHARED_TEXTURE_PALETTE_EXT:
 679          return ctx->Texture.SharedPalette;
 680       case GL_STENCIL_TEST:
 681          return ctx->Stencil.Enabled;
 682       case GL_TEXTURE_1D:
 683          {
 684             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 685             return (texUnit->Enabled & TEXTURE0_1D) ? GL_TRUE : GL_FALSE;
 686          }
 687       case GL_TEXTURE_2D:
 688          {
 689             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 690             return (texUnit->Enabled & TEXTURE0_2D) ? GL_TRUE : GL_FALSE;
 691          }
 692       case GL_TEXTURE_3D:
 693          {
 694             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 695             return (texUnit->Enabled & TEXTURE0_3D) ? GL_TRUE : GL_FALSE;
 696          }
 697       case GL_TEXTURE_GEN_Q:
 698          {
 699             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 700             return (texUnit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE;
 701          }
 702       case GL_TEXTURE_GEN_R:
 703          {
 704             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 705             return (texUnit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE;
 706          }
 707       case GL_TEXTURE_GEN_S:
 708          {
 709             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 710             return (texUnit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE;
 711          }
 712       case GL_TEXTURE_GEN_T:
 713          {
 714             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 715             return (texUnit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE;
 716          }
 717
 718       /*
 719        * CLIENT STATE!!!
 720        */
 721       case GL_VERTEX_ARRAY:
 722          return ctx->Array.Vertex.Enabled;
 723       case GL_NORMAL_ARRAY:
 724          return ctx->Array.Normal.Enabled;
 725       case GL_COLOR_ARRAY:
 726          return ctx->Array.Color.Enabled;
 727       case GL_INDEX_ARRAY:
 728          return ctx->Array.Index.Enabled;
 729       case GL_TEXTURE_COORD_ARRAY:
 730          return ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled;
 731       case GL_EDGE_FLAG_ARRAY:
 732          return ctx->Array.EdgeFlag.Enabled;
 733
 734       /* GL_HP_occlusion_test */
 735       case GL_OCCLUSION_TEST_HP:
 736          if (ctx->Extensions.HaveHpOcclusionTest) {
 737             return ctx->Depth.OcclusionTest;
 738          }
 739          else {
 740             gl_error( ctx, GL_INVALID_ENUM, "glIsEnabled" );
 741             return GL_FALSE;
 742          }
 743
 744       /* GL_SGIS_pixel_texture */
 745       case GL_PIXEL_TEXTURE_SGIS:
 746          return ctx->Pixel.PixelTextureEnabled;
 747
 748       /* GL_SGIX_pixel_texture */
 749       case GL_PIXEL_TEX_GEN_SGIX:
 750          return ctx->Pixel.PixelTextureEnabled;
 751
 752       /* GL_SGI_color_table */
 753       case GL_COLOR_TABLE_SGI:
 754          return ctx->Pixel.ColorTableEnabled;
 755       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 756          return ctx->Pixel.PostConvolutionColorTableEnabled;
 757       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 758          return ctx->Pixel.PostColorMatrixColorTableEnabled;
 759
 760       /* GL_EXT_convolution */
 761       case GL_CONVOLUTION_1D:
 762          return ctx->Pixel.Convolution1DEnabled;
 763       case GL_CONVOLUTION_2D:
 764          return ctx->Pixel.Convolution2DEnabled;
 765       case GL_SEPARABLE_2D:
 766          return ctx->Pixel.Separable2DEnabled;
 767
 768       /* GL_ARB_texture_cube_map */
 769       case GL_TEXTURE_CUBE_MAP_ARB:
 770          if (ctx->Extensions.HaveTextureCubeMap) {
 771             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 772             return (texUnit->Enabled & TEXTURE0_CUBE) ? GL_TRUE : GL_FALSE;
 773          }
 774          else {
 775             gl_error(ctx, GL_INVALID_ENUM, "glIsEnabled");
 776             return GL_FALSE;
 777          }
 778
 779       default:
 780          gl_error( ctx, GL_INVALID_ENUM, "glIsEnabled" );
 781          return GL_FALSE;
 782    }
 783 }
 784
 785
 786
 787
 788 static void
 789 client_state( GLcontext *ctx, GLenum cap, GLboolean state )
 790 {
 791    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx,
 792                                        (state
 793                                         ? "glEnableClientState"
 794                                         : "glDisableClientState") );
 795
 796    switch (cap) {
 797       case GL_VERTEX_ARRAY:
 798          ctx->Array.Vertex.Enabled = state;
 799          break;
 800       case GL_NORMAL_ARRAY:
 801          ctx->Array.Normal.Enabled = state;
 802          break;
 803       case GL_COLOR_ARRAY:
 804          ctx->Array.Color.Enabled = state;
 805          break;
 806       case GL_INDEX_ARRAY:
 807          ctx->Array.Index.Enabled = state;
 808          break;
 809       case GL_TEXTURE_COORD_ARRAY:
 810          ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled = state;
 811          break;
 812       case GL_EDGE_FLAG_ARRAY:
 813          ctx->Array.EdgeFlag.Enabled = state;
 814          break;
 815       default:
 816          gl_error( ctx, GL_INVALID_ENUM, "glEnable/DisableClientState" );
 817    }
 818
 819    ctx->NewState |= NEW_CLIENT_STATE;
 820 }
 821
 822
 823
 824 void
 825 _mesa_EnableClientState( GLenum cap )
 826 {
 827    GET_CURRENT_CONTEXT(ctx);
 828    client_state( ctx, cap, GL_TRUE );
 829 }
 830
 831
 832
 833 void
 834 _mesa_DisableClientState( GLenum cap )
 835 {
 836    GET_CURRENT_CONTEXT(ctx);
 837    client_state( ctx, cap, GL_FALSE );
 838 }
 839