src/mesa/main/enable.c

   1 /* $Id: enable.c,v 1.25 2000/10/05 23:10:42 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             _mesa_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          if (ctx->Extensions.HaveHistogram) {
 159             ctx->Pixel.HistogramEnabled = state;
 160          }
 161          else {
 162             gl_error( ctx, GL_INVALID_ENUM, state ? "glEnable": "glDisable" );
 163             return;
 164          }
 165          break;
 166       case GL_LIGHT0:
 167       case GL_LIGHT1:
 168       case GL_LIGHT2:
 169       case GL_LIGHT3:
 170       case GL_LIGHT4:
 171       case GL_LIGHT5:
 172       case GL_LIGHT6:
 173       case GL_LIGHT7:
 174          if (ctx->Light.Light[cap-GL_LIGHT0].Enabled != state) {
 175             ctx->Light.Light[cap-GL_LIGHT0].Enabled = state;
 176
 177             if (state) {
 178                insert_at_tail(&ctx->Light.EnabledList,
 179                               &ctx->Light.Light[cap-GL_LIGHT0]);
 180                if (ctx->Light.Enabled)
 181                   ctx->Enabled |= ENABLE_LIGHT;
 182             } else {
 183                remove_from_list(&ctx->Light.Light[cap-GL_LIGHT0]);
 184                if (is_empty_list(&ctx->Light.EnabledList))
 185                   ctx->Enabled &= ~ENABLE_LIGHT;
 186             }
 187
 188             ctx->NewState |= NEW_LIGHTING;
 189          }
 190          break;
 191       case GL_LIGHTING:
 192          if (ctx->Light.Enabled!=state) {
 193             ctx->Light.Enabled = state;
 194             ctx->Enabled &= ~ENABLE_LIGHT;
 195             if (state)
 196                ctx->Enabled |= ENABLE_LIGHT;
 197             ctx->NewState |= NEW_LIGHTING;
 198          }
 199          break;
 200       case GL_LINE_SMOOTH:
 201          if (ctx->Line.SmoothFlag!=state) {
 202             ctx->Line.SmoothFlag = state;
 203             ctx->TriangleCaps ^= DD_LINE_SMOOTH;
 204             ctx->NewState |= NEW_RASTER_OPS;
 205          }
 206          break;
 207       case GL_LINE_STIPPLE:
 208          if (ctx->Line.StippleFlag!=state) {
 209             ctx->Line.StippleFlag = state;
 210             ctx->TriangleCaps ^= DD_LINE_STIPPLE;
 211             ctx->NewState |= NEW_RASTER_OPS;
 212          }
 213          break;
 214       case GL_INDEX_LOGIC_OP:
 215          if (ctx->Color.IndexLogicOpEnabled!=state) {
 216             ctx->Color.IndexLogicOpEnabled = state;
 217             ctx->NewState |= NEW_RASTER_OPS;
 218          }
 219          break;
 220       case GL_COLOR_LOGIC_OP:
 221          if (ctx->Color.ColorLogicOpEnabled!=state) {
 222             ctx->Color.ColorLogicOpEnabled = state;
 223             ctx->NewState |= NEW_RASTER_OPS;
 224          }
 225          break;
 226       case GL_MAP1_COLOR_4:
 227          ctx->Eval.Map1Color4 = state;
 228          break;
 229       case GL_MAP1_INDEX:
 230          ctx->Eval.Map1Index = state;
 231          break;
 232       case GL_MAP1_NORMAL:
 233          ctx->Eval.Map1Normal = state;
 234          break;
 235       case GL_MAP1_TEXTURE_COORD_1:
 236          ctx->Eval.Map1TextureCoord1 = state;
 237          break;
 238       case GL_MAP1_TEXTURE_COORD_2:
 239          ctx->Eval.Map1TextureCoord2 = state;
 240          break;
 241       case GL_MAP1_TEXTURE_COORD_3:
 242          ctx->Eval.Map1TextureCoord3 = state;
 243          break;
 244       case GL_MAP1_TEXTURE_COORD_4:
 245          ctx->Eval.Map1TextureCoord4 = state;
 246          break;
 247       case GL_MAP1_VERTEX_3:
 248          ctx->Eval.Map1Vertex3 = state;
 249          break;
 250       case GL_MAP1_VERTEX_4:
 251          ctx->Eval.Map1Vertex4 = state;
 252          break;
 253       case GL_MAP2_COLOR_4:
 254          ctx->Eval.Map2Color4 = state;
 255          break;
 256       case GL_MAP2_INDEX:
 257          ctx->Eval.Map2Index = state;
 258          break;
 259       case GL_MAP2_NORMAL:
 260          ctx->Eval.Map2Normal = state;
 261          break;
 262       case GL_MAP2_TEXTURE_COORD_1:
 263          ctx->Eval.Map2TextureCoord1 = state;
 264          break;
 265       case GL_MAP2_TEXTURE_COORD_2:
 266          ctx->Eval.Map2TextureCoord2 = state;
 267          break;
 268       case GL_MAP2_TEXTURE_COORD_3:
 269          ctx->Eval.Map2TextureCoord3 = state;
 270          break;
 271       case GL_MAP2_TEXTURE_COORD_4:
 272          ctx->Eval.Map2TextureCoord4 = state;
 273          break;
 274       case GL_MAP2_VERTEX_3:
 275          ctx->Eval.Map2Vertex3 = state;
 276          break;
 277       case GL_MAP2_VERTEX_4:
 278          ctx->Eval.Map2Vertex4 = state;
 279          break;
 280       case GL_MINMAX:
 281          ctx->Pixel.MinMaxEnabled = state;
 282          break;
 283       case GL_NORMALIZE:
 284          if (ctx->Transform.Normalize != state) {
 285             ctx->Transform.Normalize = state;
 286             ctx->NewState |= NEW_NORMAL_TRANSFORM|NEW_LIGHTING;
 287             ctx->Enabled ^= ENABLE_NORMALIZE;
 288          }
 289          break;
 290       case GL_POINT_SMOOTH:
 291          if (ctx->Point.SmoothFlag!=state) {
 292             ctx->Point.SmoothFlag = state;
 293             ctx->TriangleCaps ^= DD_POINT_SMOOTH;
 294             ctx->NewState |= NEW_RASTER_OPS;
 295          }
 296          break;
 297       case GL_POLYGON_SMOOTH:
 298          if (ctx->Polygon.SmoothFlag!=state) {
 299             ctx->Polygon.SmoothFlag = state;
 300             ctx->TriangleCaps ^= DD_TRI_SMOOTH;
 301             ctx->NewState |= NEW_RASTER_OPS;
 302          }
 303          break;
 304       case GL_POLYGON_STIPPLE:
 305          if (ctx->Polygon.StippleFlag!=state) {
 306             ctx->Polygon.StippleFlag = state;
 307             ctx->TriangleCaps ^= DD_TRI_STIPPLE;
 308             ctx->NewState |= NEW_RASTER_OPS;
 309          }
 310          break;
 311       case GL_POLYGON_OFFSET_POINT:
 312          if (ctx->Polygon.OffsetPoint!=state) {
 313             ctx->Polygon.OffsetPoint = state;
 314             ctx->NewState |= NEW_POLYGON;
 315          }
 316          break;
 317       case GL_POLYGON_OFFSET_LINE:
 318          if (ctx->Polygon.OffsetLine!=state) {
 319             ctx->Polygon.OffsetLine = state;
 320             ctx->NewState |= NEW_POLYGON;
 321          }
 322          break;
 323       case GL_POLYGON_OFFSET_FILL:
 324       /*case GL_POLYGON_OFFSET_EXT:*/
 325          if (ctx->Polygon.OffsetFill!=state) {
 326             ctx->Polygon.OffsetFill = state;
 327             ctx->NewState |= NEW_POLYGON;
 328          }
 329          break;
 330       case GL_RESCALE_NORMAL_EXT:
 331          if (ctx->Transform.RescaleNormals != state) {
 332             ctx->Transform.RescaleNormals = state;
 333             ctx->NewState |= NEW_NORMAL_TRANSFORM|NEW_LIGHTING;
 334             ctx->Enabled ^= ENABLE_RESCALE;
 335          }
 336          break;
 337       case GL_SCISSOR_TEST:
 338          if (ctx->Scissor.Enabled!=state) {
 339             ctx->Scissor.Enabled = state;
 340             ctx->NewState |= NEW_RASTER_OPS;
 341          }
 342          break;
 343       case GL_SHARED_TEXTURE_PALETTE_EXT:
 344          ctx->Texture.SharedPalette = state;
 345          break;
 346       case GL_STENCIL_TEST:
 347          if (state && ctx->Visual.StencilBits==0) {
 348             _mesa_warning(ctx, "glEnable(GL_STENCIL_TEST) but no stencil buffer");
 349             return;
 350          }
 351          if (ctx->Stencil.Enabled!=state) {
 352             ctx->Stencil.Enabled = state;
 353             ctx->NewState |= NEW_RASTER_OPS;
 354             ctx->TriangleCaps ^= DD_STENCIL;
 355          }
 356          break;
 357       case GL_TEXTURE_1D:
 358          if (ctx->Visual.RGBAflag) {
 359             const GLuint curr = ctx->Texture.CurrentUnit;
 360             const GLuint flag = TEXTURE0_1D << (curr * 4);
 361             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 362             ctx->NewState |= NEW_TEXTURE_ENABLE;
 363             if (state) {
 364                texUnit->Enabled |= TEXTURE0_1D;
 365                ctx->Enabled |= flag;
 366             }
 367             else {
 368                texUnit->Enabled &= ~TEXTURE0_1D;
 369                ctx->Enabled &= ~flag;
 370             }
 371          }
 372          break;
 373       case GL_TEXTURE_2D:
 374          if (ctx->Visual.RGBAflag) {
 375             const GLuint curr = ctx->Texture.CurrentUnit;
 376             const GLuint flag = TEXTURE0_2D << (curr * 4);
 377             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 378             ctx->NewState |= NEW_TEXTURE_ENABLE;
 379             if (state) {
 380                texUnit->Enabled |= TEXTURE0_2D;
 381                ctx->Enabled |= flag;
 382             }
 383             else {
 384                texUnit->Enabled &= ~TEXTURE0_2D;
 385                ctx->Enabled &= ~flag;
 386             }
 387          }
 388          break;
 389       case GL_TEXTURE_3D:
 390          if (ctx->Visual.RGBAflag) {
 391             const GLuint curr = ctx->Texture.CurrentUnit;
 392             const GLuint flag = TEXTURE0_3D << (curr * 4);
 393             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 394             ctx->NewState |= NEW_TEXTURE_ENABLE;
 395             if (state) {
 396                texUnit->Enabled |= TEXTURE0_3D;
 397                ctx->Enabled |= flag;
 398             }
 399             else {
 400                texUnit->Enabled &= ~TEXTURE0_3D;
 401                ctx->Enabled &= ~flag;
 402             }
 403          }
 404          break;
 405       case GL_TEXTURE_GEN_Q:
 406          {
 407             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 408             if (state)
 409                texUnit->TexGenEnabled |= Q_BIT;
 410             else
 411                texUnit->TexGenEnabled &= ~Q_BIT;
 412             ctx->NewState |= NEW_TEXTURING;
 413          }
 414          break;
 415       case GL_TEXTURE_GEN_R:
 416          {
 417             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 418             if (state)
 419                texUnit->TexGenEnabled |= R_BIT;
 420             else
 421                texUnit->TexGenEnabled &= ~R_BIT;
 422             ctx->NewState |= NEW_TEXTURING;
 423          }
 424          break;
 425       case GL_TEXTURE_GEN_S:
 426          {
 427             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 428             if (state)
 429                texUnit->TexGenEnabled |= S_BIT;
 430             else
 431                texUnit->TexGenEnabled &= ~S_BIT;
 432             ctx->NewState |= NEW_TEXTURING;
 433          }
 434          break;
 435       case GL_TEXTURE_GEN_T:
 436          {
 437             struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 438             if (state)
 439                texUnit->TexGenEnabled |= T_BIT;
 440             else
 441                texUnit->TexGenEnabled &= ~T_BIT;
 442             ctx->NewState |= NEW_TEXTURING;
 443          }
 444          break;
 445
 446       /*
 447        * CLIENT STATE!!!
 448        */
 449       case GL_VERTEX_ARRAY:
 450          ctx->Array.Vertex.Enabled = state;
 451          break;
 452       case GL_NORMAL_ARRAY:
 453          ctx->Array.Normal.Enabled = state;
 454          break;
 455       case GL_COLOR_ARRAY:
 456          ctx->Array.Color.Enabled = state;
 457          break;
 458       case GL_INDEX_ARRAY:
 459          ctx->Array.Index.Enabled = state;
 460          break;
 461       case GL_TEXTURE_COORD_ARRAY:
 462          ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled = state;
 463          break;
 464       case GL_EDGE_FLAG_ARRAY:
 465          ctx->Array.EdgeFlag.Enabled = state;
 466          break;
 467
 468       /* GL_HP_occlusion_test */
 469       case GL_OCCLUSION_TEST_HP:
 470          if (ctx->Extensions.HaveHpOcclusionTest) {
 471             ctx->Depth.OcclusionTest = state;
 472             if (state)
 473                ctx->OcclusionResult = ctx->OcclusionResultSaved;
 474             else
 475                ctx->OcclusionResultSaved = ctx->OcclusionResult;
 476             ctx->NewState |= NEW_RASTER_OPS;
 477          }
 478          else {
 479             gl_error( ctx, GL_INVALID_ENUM, state ? "glEnable": "glDisable" );
 480             return;
 481          }
 482          break;
 483
 484       /* GL_SGIS_pixel_texture */
 485       case GL_PIXEL_TEXTURE_SGIS:
 486          /* XXX check for extension */
 487          ctx->Pixel.PixelTextureEnabled = state;
 488          break;
 489
 490       /* GL_SGIX_pixel_texture */
 491       case GL_PIXEL_TEX_GEN_SGIX:
 492          /* XXX check for extension */
 493          ctx->Pixel.PixelTextureEnabled = state;
 494          break;
 495
 496       /* GL_SGI_color_table */
 497       case GL_COLOR_TABLE_SGI:
 498          /* XXX check for extension */
 499          ctx->Pixel.ColorTableEnabled = state;
 500          ctx->ImageTransferState = UPDATE_IMAGE_TRANSFER_STATE;
 501          break;
 502       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 503          ctx->Pixel.PostConvolutionColorTableEnabled = state;
 504          ctx->ImageTransferState = UPDATE_IMAGE_TRANSFER_STATE;
 505          break;
 506       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 507          ctx->Pixel.PostColorMatrixColorTableEnabled = state;
 508          ctx->ImageTransferState = UPDATE_IMAGE_TRANSFER_STATE;
 509          break;
 510
 511       /* GL_EXT_convolution */
 512       case GL_CONVOLUTION_1D:
 513          /* XXX check for extension */
 514          ctx->Pixel.Convolution1DEnabled = state;
 515          ctx->ImageTransferState = UPDATE_IMAGE_TRANSFER_STATE;
 516          break;
 517       case GL_CONVOLUTION_2D:
 518          ctx->Pixel.Convolution2DEnabled = state;
 519          ctx->ImageTransferState = UPDATE_IMAGE_TRANSFER_STATE;
 520          break;
 521       case GL_SEPARABLE_2D:
 522          ctx->Pixel.Separable2DEnabled = state;
 523          ctx->ImageTransferState = UPDATE_IMAGE_TRANSFER_STATE;
 524          break;
 525
 526       /* GL_ARB_texture_cube_map */
 527       case GL_TEXTURE_CUBE_MAP_ARB:
 528          if (ctx->Extensions.HaveTextureCubeMap) {
 529             if (ctx->Visual.RGBAflag) {
 530                const GLuint curr = ctx->Texture.CurrentUnit;
 531                const GLuint flag = TEXTURE0_CUBE << (curr * 4);
 532                struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 533                ctx->NewState |= NEW_TEXTURE_ENABLE;
 534                if (state) {
 535                   texUnit->Enabled |= TEXTURE0_CUBE;
 536                   ctx->Enabled |= flag;
 537                }
 538                else {
 539                   texUnit->Enabled &= ~TEXTURE0_CUBE;
 540                   ctx->Enabled &= ~flag;
 541                }
 542             }
 543          }
 544          else {
 545             if (state)
 546                gl_error(ctx, GL_INVALID_ENUM, "glEnable");
 547             else
 548                gl_error(ctx, GL_INVALID_ENUM, "glDisable");
 549             return;
 550          }
 551          break;
 552
 553       default:
 554          if (state) {
 555             gl_error( ctx, GL_INVALID_ENUM, "glEnable" );
 556          }
 557          else {
 558             gl_error( ctx, GL_INVALID_ENUM, "glDisable" );
 559          }
 560          return;
 561    }
 562
 563    if (ctx->Driver.Enable) {
 564       (*ctx->Driver.Enable)( ctx, cap, state );
 565    }
 566 }
 567
 568
 569
 570
 571 void
 572 _mesa_Enable( GLenum cap )
 573 {
 574    GET_CURRENT_CONTEXT(ctx);
 575    _mesa_set_enable( ctx, cap, GL_TRUE );
 576 }
 577
 578
 579
 580 void
 581 _mesa_Disable( GLenum cap )
 582 {
 583    GET_CURRENT_CONTEXT(ctx);
 584    _mesa_set_enable( ctx, cap, GL_FALSE );
 585 }
 586
 587
 588
 589 GLboolean
 590 _mesa_IsEnabled( GLenum cap )
 591 {
 592    GET_CURRENT_CONTEXT(ctx);
 593    switch (cap) {
 594       case GL_ALPHA_TEST:
 595          return ctx->Color.AlphaEnabled;
 596       case GL_AUTO_NORMAL:
 597          return ctx->Eval.AutoNormal;
 598       case GL_BLEND:
 599          return ctx->Color.BlendEnabled;
 600       case GL_CLIP_PLANE0:
 601       case GL_CLIP_PLANE1:
 602       case GL_CLIP_PLANE2:
 603       case GL_CLIP_PLANE3:
 604       case GL_CLIP_PLANE4:
 605       case GL_CLIP_PLANE5:
 606          return ctx->Transform.ClipEnabled[cap-GL_CLIP_PLANE0];
 607       case GL_COLOR_MATERIAL:
 608          return ctx->Light.ColorMaterialEnabled;
 609       case GL_CULL_FACE:
 610          return ctx->Polygon.CullFlag;
 611       case GL_DEPTH_TEST:
 612          return ctx->Depth.Test;
 613       case GL_DITHER:
 614          return ctx->Color.DitherFlag;
 615       case GL_FOG:
 616          return ctx->Fog.Enabled;
 617       case GL_HISTOGRAM:
 618          if (ctx->Extensions.HaveHistogram) {
 619             return ctx->Pixel.HistogramEnabled;
 620          }
 621          else {
 622             gl_error(ctx, GL_INVALID_ENUM, "glIsEnabled");
 623             return GL_FALSE;
 624          }
 625       case GL_LIGHTING:
 626          return ctx->Light.Enabled;
 627       case GL_LIGHT0:
 628       case GL_LIGHT1:
 629       case GL_LIGHT2:
 630       case GL_LIGHT3:
 631       case GL_LIGHT4:
 632       case GL_LIGHT5:
 633       case GL_LIGHT6:
 634       case GL_LIGHT7:
 635          return ctx->Light.Light[cap-GL_LIGHT0].Enabled;
 636       case GL_LINE_SMOOTH:
 637          return ctx->Line.SmoothFlag;
 638       case GL_LINE_STIPPLE:
 639          return ctx->Line.StippleFlag;
 640       case GL_INDEX_LOGIC_OP:
 641          return ctx->Color.IndexLogicOpEnabled;
 642       case GL_COLOR_LOGIC_OP:
 643          return ctx->Color.ColorLogicOpEnabled;
 644       case GL_MAP1_COLOR_4:
 645          return ctx->Eval.Map1Color4;
 646       case GL_MAP1_INDEX:
 647          return ctx->Eval.Map1Index;
 648       case GL_MAP1_NORMAL:
 649          return ctx->Eval.Map1Normal;
 650       case GL_MAP1_TEXTURE_COORD_1:
 651          return ctx->Eval.Map1TextureCoord1;
 652       case GL_MAP1_TEXTURE_COORD_2:
 653          return ctx->Eval.Map1TextureCoord2;
 654       case GL_MAP1_TEXTURE_COORD_3:
 655          return ctx->Eval.Map1TextureCoord3;
 656       case GL_MAP1_TEXTURE_COORD_4:
 657          return ctx->Eval.Map1TextureCoord4;
 658       case GL_MAP1_VERTEX_3:
 659          return ctx->Eval.Map1Vertex3;
 660       case GL_MAP1_VERTEX_4:
 661          return ctx->Eval.Map1Vertex4;
 662       case GL_MAP2_COLOR_4:
 663          return ctx->Eval.Map2Color4;
 664       case GL_MAP2_INDEX:
 665          return ctx->Eval.Map2Index;
 666       case GL_MAP2_NORMAL:
 667          return ctx->Eval.Map2Normal;
 668       case GL_MAP2_TEXTURE_COORD_1:
 669          return ctx->Eval.Map2TextureCoord1;
 670       case GL_MAP2_TEXTURE_COORD_2:
 671          return ctx->Eval.Map2TextureCoord2;
 672       case GL_MAP2_TEXTURE_COORD_3:
 673          return ctx->Eval.Map2TextureCoord3;
 674       case GL_MAP2_TEXTURE_COORD_4:
 675          return ctx->Eval.Map2TextureCoord4;
 676       case GL_MAP2_VERTEX_3:
 677          return ctx->Eval.Map2Vertex3;
 678       case GL_MAP2_VERTEX_4:
 679          return ctx->Eval.Map2Vertex4;
 680       case GL_MINMAX:
 681          return ctx->Pixel.MinMaxEnabled;
 682       case GL_NORMALIZE:
 683          return ctx->Transform.Normalize;
 684       case GL_POINT_SMOOTH:
 685          return ctx->Point.SmoothFlag;
 686       case GL_POLYGON_SMOOTH:
 687          return ctx->Polygon.SmoothFlag;
 688       case GL_POLYGON_STIPPLE:
 689          return ctx->Polygon.StippleFlag;
 690       case GL_POLYGON_OFFSET_POINT:
 691          return ctx->Polygon.OffsetPoint;
 692       case GL_POLYGON_OFFSET_LINE:
 693          return ctx->Polygon.OffsetLine;
 694       case GL_POLYGON_OFFSET_FILL:
 695       /*case GL_POLYGON_OFFSET_EXT:*/
 696          return ctx->Polygon.OffsetFill;
 697       case GL_RESCALE_NORMAL_EXT:
 698          return ctx->Transform.RescaleNormals;
 699       case GL_SCISSOR_TEST:
 700          return ctx->Scissor.Enabled;
 701       case GL_SHARED_TEXTURE_PALETTE_EXT:
 702          return ctx->Texture.SharedPalette;
 703       case GL_STENCIL_TEST:
 704          return ctx->Stencil.Enabled;
 705       case GL_TEXTURE_1D:
 706          {
 707             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 708             return (texUnit->Enabled & TEXTURE0_1D) ? GL_TRUE : GL_FALSE;
 709          }
 710       case GL_TEXTURE_2D:
 711          {
 712             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 713             return (texUnit->Enabled & TEXTURE0_2D) ? GL_TRUE : GL_FALSE;
 714          }
 715       case GL_TEXTURE_3D:
 716          {
 717             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 718             return (texUnit->Enabled & TEXTURE0_3D) ? GL_TRUE : GL_FALSE;
 719          }
 720       case GL_TEXTURE_GEN_Q:
 721          {
 722             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 723             return (texUnit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE;
 724          }
 725       case GL_TEXTURE_GEN_R:
 726          {
 727             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 728             return (texUnit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE;
 729          }
 730       case GL_TEXTURE_GEN_S:
 731          {
 732             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 733             return (texUnit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE;
 734          }
 735       case GL_TEXTURE_GEN_T:
 736          {
 737             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 738             return (texUnit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE;
 739          }
 740
 741       /*
 742        * CLIENT STATE!!!
 743        */
 744       case GL_VERTEX_ARRAY:
 745          return ctx->Array.Vertex.Enabled;
 746       case GL_NORMAL_ARRAY:
 747          return ctx->Array.Normal.Enabled;
 748       case GL_COLOR_ARRAY:
 749          return ctx->Array.Color.Enabled;
 750       case GL_INDEX_ARRAY:
 751          return ctx->Array.Index.Enabled;
 752       case GL_TEXTURE_COORD_ARRAY:
 753          return ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled;
 754       case GL_EDGE_FLAG_ARRAY:
 755          return ctx->Array.EdgeFlag.Enabled;
 756
 757       /* GL_HP_occlusion_test */
 758       case GL_OCCLUSION_TEST_HP:
 759          if (ctx->Extensions.HaveHpOcclusionTest) {
 760             return ctx->Depth.OcclusionTest;
 761          }
 762          else {
 763             gl_error( ctx, GL_INVALID_ENUM, "glIsEnabled" );
 764             return GL_FALSE;
 765          }
 766
 767       /* GL_SGIS_pixel_texture */
 768       case GL_PIXEL_TEXTURE_SGIS:
 769          return ctx->Pixel.PixelTextureEnabled;
 770
 771       /* GL_SGIX_pixel_texture */
 772       case GL_PIXEL_TEX_GEN_SGIX:
 773          return ctx->Pixel.PixelTextureEnabled;
 774
 775       /* GL_SGI_color_table */
 776       case GL_COLOR_TABLE_SGI:
 777          return ctx->Pixel.ColorTableEnabled;
 778       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 779          return ctx->Pixel.PostConvolutionColorTableEnabled;
 780       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 781          return ctx->Pixel.PostColorMatrixColorTableEnabled;
 782
 783       /* GL_EXT_convolution */
 784       case GL_CONVOLUTION_1D:
 785          return ctx->Pixel.Convolution1DEnabled;
 786       case GL_CONVOLUTION_2D:
 787          return ctx->Pixel.Convolution2DEnabled;
 788       case GL_SEPARABLE_2D:
 789          return ctx->Pixel.Separable2DEnabled;
 790
 791       /* GL_ARB_texture_cube_map */
 792       case GL_TEXTURE_CUBE_MAP_ARB:
 793          if (ctx->Extensions.HaveTextureCubeMap) {
 794             const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 795             return (texUnit->Enabled & TEXTURE0_CUBE) ? GL_TRUE : GL_FALSE;
 796          }
 797          else {
 798             gl_error(ctx, GL_INVALID_ENUM, "glIsEnabled");
 799             return GL_FALSE;
 800          }
 801
 802       default:
 803          gl_error( ctx, GL_INVALID_ENUM, "glIsEnabled" );
 804          return GL_FALSE;
 805    }
 806 }
 807
 808
 809
 810
 811 static void
 812 client_state( GLcontext *ctx, GLenum cap, GLboolean state )
 813 {
 814    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx,
 815                                        (state
 816                                         ? "glEnableClientState"
 817                                         : "glDisableClientState") );
 818
 819    switch (cap) {
 820       case GL_VERTEX_ARRAY:
 821          ctx->Array.Vertex.Enabled = state;
 822          break;
 823       case GL_NORMAL_ARRAY:
 824          ctx->Array.Normal.Enabled = state;
 825          break;
 826       case GL_COLOR_ARRAY:
 827          ctx->Array.Color.Enabled = state;
 828          break;
 829       case GL_INDEX_ARRAY:
 830          ctx->Array.Index.Enabled = state;
 831          break;
 832       case GL_TEXTURE_COORD_ARRAY:
 833          ctx->Array.TexCoord[ctx->Array.ActiveTexture].Enabled = state;
 834          break;
 835       case GL_EDGE_FLAG_ARRAY:
 836          ctx->Array.EdgeFlag.Enabled = state;
 837          break;
 838       default:
 839          gl_error( ctx, GL_INVALID_ENUM, "glEnable/DisableClientState" );
 840    }
 841
 842    ctx->NewState |= NEW_CLIENT_STATE;
 843 }
 844
 845
 846
 847 void
 848 _mesa_EnableClientState( GLenum cap )
 849 {
 850    GET_CURRENT_CONTEXT(ctx);
 851    client_state( ctx, cap, GL_TRUE );
 852 }
 853
 854
 855
 856 void
 857 _mesa_DisableClientState( GLenum cap )
 858 {
 859    GET_CURRENT_CONTEXT(ctx);
 860    client_state( ctx, cap, GL_FALSE );
 861 }
 862