src/mesa/main/enable.c

   1 /**
   2  * \file enable.c
   3  * Enable/disable/query GL capabilities.
   4  */
   5
   6 /*
   7  * Mesa 3-D graphics library
   8  * Version:  7.0.3
   9  *
  10  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the "Software"),
  14  * to deal in the Software without restriction, including without limitation
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16  * and/or sell copies of the Software, and to permit persons to whom the
  17  * Software is furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included
  20  * in all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  23  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  26  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  27  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28  */
  29
  30
  31 #include "glheader.h"
  32 #include "context.h"
  33 #include "enable.h"
  34 #include "light.h"
  35 #include "macros.h"
  36 #include "simple_list.h"
  37 #include "mtypes.h"
  38 #include "enums.h"
  39 #include "math/m_matrix.h"
  40 #include "math/m_xform.h"
  41 #include "api_arrayelt.h"
  42
  43
  44
  45 #define CHECK_EXTENSION(EXTNAME, CAP)                                   \
  46    if (!ctx->Extensions.EXTNAME) {                                      \
  47       _mesa_error(ctx, GL_INVALID_ENUM, "gl%sClientState(0x%x)",        \
  48                   state ? "Enable" : "Disable", CAP);                   \
  49       return;                                                           \
  50    }
  51
  52
  53 /**
  54  * Helper to enable/disable client-side state.
  55  */
  56 static void
  57 client_state(GLcontext *ctx, GLenum cap, GLboolean state)
  58 {
  59    GLuint flag;
  60    GLboolean *var;
  61
  62    switch (cap) {
  63       case GL_VERTEX_ARRAY:
  64          var = &ctx->Array.ArrayObj->Vertex.Enabled;
  65          flag = _NEW_ARRAY_VERTEX;
  66          break;
  67       case GL_NORMAL_ARRAY:
  68          var = &ctx->Array.ArrayObj->Normal.Enabled;
  69          flag = _NEW_ARRAY_NORMAL;
  70          break;
  71       case GL_COLOR_ARRAY:
  72          var = &ctx->Array.ArrayObj->Color.Enabled;
  73          flag = _NEW_ARRAY_COLOR0;
  74          break;
  75       case GL_INDEX_ARRAY:
  76          var = &ctx->Array.ArrayObj->Index.Enabled;
  77          flag = _NEW_ARRAY_INDEX;
  78          break;
  79       case GL_TEXTURE_COORD_ARRAY:
  80          var = &ctx->Array.ArrayObj->TexCoord[ctx->Array.ActiveTexture].Enabled;
  81          flag = _NEW_ARRAY_TEXCOORD(ctx->Array.ActiveTexture);
  82          break;
  83       case GL_EDGE_FLAG_ARRAY:
  84          var = &ctx->Array.ArrayObj->EdgeFlag.Enabled;
  85          flag = _NEW_ARRAY_EDGEFLAG;
  86          break;
  87       case GL_FOG_COORDINATE_ARRAY_EXT:
  88          var = &ctx->Array.ArrayObj->FogCoord.Enabled;
  89          flag = _NEW_ARRAY_FOGCOORD;
  90          break;
  91       case GL_SECONDARY_COLOR_ARRAY_EXT:
  92          var = &ctx->Array.ArrayObj->SecondaryColor.Enabled;
  93          flag = _NEW_ARRAY_COLOR1;
  94          break;
  95
  96 #if FEATURE_point_size_array
  97       case GL_POINT_SIZE_ARRAY_OES:
  98          var = &ctx->Array.ArrayObj->PointSize.Enabled;
  99          flag = _NEW_ARRAY_POINT_SIZE;
 100          break;
 101 #endif
 102
 103 #if FEATURE_NV_vertex_program
 104       case GL_VERTEX_ATTRIB_ARRAY0_NV:
 105       case GL_VERTEX_ATTRIB_ARRAY1_NV:
 106       case GL_VERTEX_ATTRIB_ARRAY2_NV:
 107       case GL_VERTEX_ATTRIB_ARRAY3_NV:
 108       case GL_VERTEX_ATTRIB_ARRAY4_NV:
 109       case GL_VERTEX_ATTRIB_ARRAY5_NV:
 110       case GL_VERTEX_ATTRIB_ARRAY6_NV:
 111       case GL_VERTEX_ATTRIB_ARRAY7_NV:
 112       case GL_VERTEX_ATTRIB_ARRAY8_NV:
 113       case GL_VERTEX_ATTRIB_ARRAY9_NV:
 114       case GL_VERTEX_ATTRIB_ARRAY10_NV:
 115       case GL_VERTEX_ATTRIB_ARRAY11_NV:
 116       case GL_VERTEX_ATTRIB_ARRAY12_NV:
 117       case GL_VERTEX_ATTRIB_ARRAY13_NV:
 118       case GL_VERTEX_ATTRIB_ARRAY14_NV:
 119       case GL_VERTEX_ATTRIB_ARRAY15_NV:
 120          CHECK_EXTENSION(NV_vertex_program, cap);
 121          {
 122             GLint n = (GLint) cap - GL_VERTEX_ATTRIB_ARRAY0_NV;
 123             var = &ctx->Array.ArrayObj->VertexAttrib[n].Enabled;
 124             flag = _NEW_ARRAY_ATTRIB(n);
 125          }
 126          break;
 127 #endif /* FEATURE_NV_vertex_program */
 128
 129       default:
 130          _mesa_error( ctx, GL_INVALID_ENUM,
 131                       "glEnable/DisableClientState(0x%x)", cap);
 132          return;
 133    }
 134
 135    if (*var == state)
 136       return;
 137
 138    FLUSH_VERTICES(ctx, _NEW_ARRAY);
 139    ctx->Array.NewState |= flag;
 140
 141    _ae_invalidate_state(ctx, _NEW_ARRAY);
 142
 143    *var = state;
 144
 145    if (state)
 146       ctx->Array.ArrayObj->_Enabled |= flag;
 147    else
 148       ctx->Array.ArrayObj->_Enabled &= ~flag;
 149
 150    if (ctx->Driver.Enable) {
 151       ctx->Driver.Enable( ctx, cap, state );
 152    }
 153 }
 154
 155
 156 /**
 157  * Enable GL capability.
 158  * \param cap  state to enable/disable.
 159  *
 160  * Get's the current context, assures that we're outside glBegin()/glEnd() and
 161  * calls client_state().
 162  */
 163 void GLAPIENTRY
 164 _mesa_EnableClientState( GLenum cap )
 165 {
 166    GET_CURRENT_CONTEXT(ctx);
 167    ASSERT_OUTSIDE_BEGIN_END(ctx);
 168    client_state( ctx, cap, GL_TRUE );
 169 }
 170
 171
 172 /**
 173  * Disable GL capability.
 174  * \param cap  state to enable/disable.
 175  *
 176  * Get's the current context, assures that we're outside glBegin()/glEnd() and
 177  * calls client_state().
 178  */
 179 void GLAPIENTRY
 180 _mesa_DisableClientState( GLenum cap )
 181 {
 182    GET_CURRENT_CONTEXT(ctx);
 183    ASSERT_OUTSIDE_BEGIN_END(ctx);
 184    client_state( ctx, cap, GL_FALSE );
 185 }
 186
 187
 188 #undef CHECK_EXTENSION
 189 #define CHECK_EXTENSION(EXTNAME, CAP)                                   \
 190    if (!ctx->Extensions.EXTNAME) {                                      \
 191       _mesa_error(ctx, GL_INVALID_ENUM, "gl%s(0x%x)",                   \
 192                   state ? "Enable" : "Disable", CAP);                   \
 193       return;                                                           \
 194    }
 195
 196 #define CHECK_EXTENSION2(EXT1, EXT2, CAP)                               \
 197    if (!ctx->Extensions.EXT1 && !ctx->Extensions.EXT2) {                \
 198       _mesa_error(ctx, GL_INVALID_ENUM, "gl%s(0x%x)",                   \
 199                   state ? "Enable" : "Disable", CAP);                   \
 200       return;                                                           \
 201    }
 202
 203
 204
 205 /**
 206  * Return pointer to current texture unit for setting/getting coordinate
 207  * state.
 208  * Note that we'll set GL_INVALID_OPERATION if the active texture unit is
 209  * higher than the number of supported coordinate units.  And we'll return NULL.
 210  */
 211 static struct gl_texture_unit *
 212 get_texcoord_unit(GLcontext *ctx)
 213 {
 214    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 215       _mesa_error(ctx, GL_INVALID_OPERATION, "glEnable/Disable(texcoord unit)");
 216       return NULL;
 217    }
 218    else {
 219       return &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 220    }
 221 }
 222
 223
 224 /**
 225  * Helper function to enable or disable a texture target.
 226  */
 227 static GLboolean
 228 enable_texture(GLcontext *ctx, GLboolean state, GLbitfield bit)
 229 {
 230    const GLuint curr = ctx->Texture.CurrentUnit;
 231    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[curr];
 232    const GLuint newenabled = (!state)
 233        ? (texUnit->Enabled & ~bit) :  (texUnit->Enabled | bit);
 234
 235    if (!ctx->DrawBuffer->Visual.rgbMode || texUnit->Enabled == newenabled)
 236        return GL_FALSE;
 237
 238    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 239    texUnit->Enabled = newenabled;
 240    return GL_TRUE;
 241 }
 242
 243
 244 /**
 245  * Helper function to enable or disable state.
 246  *
 247  * \param ctx GL context.
 248  * \param cap  the state to enable/disable
 249  * \param state whether to enable or disable the specified capability.
 250  *
 251  * Updates the current context and flushes the vertices as needed. For
 252  * capabilities associated with extensions it verifies that those extensions
 253  * are effectivly present before updating. Notifies the driver via
 254  * dd_function_table::Enable.
 255  */
 256 void
 257 _mesa_set_enable(GLcontext *ctx, GLenum cap, GLboolean state)
 258 {
 259    if (MESA_VERBOSE & VERBOSE_API)
 260       _mesa_debug(ctx, "%s %s (newstate is %x)\n",
 261                   state ? "glEnable" : "glDisable",
 262                   _mesa_lookup_enum_by_nr(cap),
 263                   ctx->NewState);
 264
 265    switch (cap) {
 266       case GL_ALPHA_TEST:
 267          if (ctx->Color.AlphaEnabled == state)
 268             return;
 269          FLUSH_VERTICES(ctx, _NEW_COLOR);
 270          ctx->Color.AlphaEnabled = state;
 271          break;
 272       case GL_AUTO_NORMAL:
 273          if (ctx->Eval.AutoNormal == state)
 274             return;
 275          FLUSH_VERTICES(ctx, _NEW_EVAL);
 276          ctx->Eval.AutoNormal = state;
 277          break;
 278       case GL_BLEND:
 279          if (ctx->Color.BlendEnabled == state)
 280             return;
 281          FLUSH_VERTICES(ctx, _NEW_COLOR);
 282          ctx->Color.BlendEnabled = state;
 283          break;
 284 #if FEATURE_userclip
 285       case GL_CLIP_PLANE0:
 286       case GL_CLIP_PLANE1:
 287       case GL_CLIP_PLANE2:
 288       case GL_CLIP_PLANE3:
 289       case GL_CLIP_PLANE4:
 290       case GL_CLIP_PLANE5:
 291          {
 292             const GLuint p = cap - GL_CLIP_PLANE0;
 293
 294             if ((ctx->Transform.ClipPlanesEnabled & (1 << p)) == ((GLuint) state << p))
 295                return;
 296
 297             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 298
 299             if (state) {
 300                ctx->Transform.ClipPlanesEnabled |= (1 << p);
 301
 302                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
 303                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
 304
 305                /* This derived state also calculated in clip.c and
 306                 * from _mesa_update_state() on changes to EyeUserPlane
 307                 * and ctx->ProjectionMatrix respectively.
 308                 */
 309                _mesa_transform_vector( ctx->Transform._ClipUserPlane[p],
 310                                     ctx->Transform.EyeUserPlane[p],
 311                                     ctx->ProjectionMatrixStack.Top->inv );
 312             }
 313             else {
 314                ctx->Transform.ClipPlanesEnabled &= ~(1 << p);
 315             }
 316          }
 317          break;
 318 #endif
 319       case GL_COLOR_MATERIAL:
 320          if (ctx->Light.ColorMaterialEnabled == state)
 321             return;
 322          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 323          FLUSH_CURRENT(ctx, 0);
 324          ctx->Light.ColorMaterialEnabled = state;
 325          if (state) {
 326             _mesa_update_color_material( ctx,
 327                                   ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 328          }
 329          break;
 330       case GL_CULL_FACE:
 331          if (ctx->Polygon.CullFlag == state)
 332             return;
 333          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 334          ctx->Polygon.CullFlag = state;
 335          break;
 336       case GL_CULL_VERTEX_EXT:
 337          CHECK_EXTENSION(EXT_cull_vertex, cap);
 338          if (ctx->Transform.CullVertexFlag == state)
 339             return;
 340          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 341          ctx->Transform.CullVertexFlag = state;
 342          break;
 343       case GL_DEPTH_TEST:
 344          if (ctx->Depth.Test == state)
 345             return;
 346          FLUSH_VERTICES(ctx, _NEW_DEPTH);
 347          ctx->Depth.Test = state;
 348          break;
 349       case GL_DITHER:
 350          if (ctx->NoDither) {
 351             state = GL_FALSE; /* MESA_NO_DITHER env var */
 352          }
 353          if (ctx->Color.DitherFlag == state)
 354             return;
 355          FLUSH_VERTICES(ctx, _NEW_COLOR);
 356          ctx->Color.DitherFlag = state;
 357          break;
 358       case GL_FOG:
 359          if (ctx->Fog.Enabled == state)
 360             return;
 361          FLUSH_VERTICES(ctx, _NEW_FOG);
 362          ctx->Fog.Enabled = state;
 363          break;
 364       case GL_HISTOGRAM:
 365          CHECK_EXTENSION(EXT_histogram, cap);
 366          if (ctx->Pixel.HistogramEnabled == state)
 367             return;
 368          FLUSH_VERTICES(ctx, _NEW_PIXEL);
 369          ctx->Pixel.HistogramEnabled = state;
 370          break;
 371       case GL_LIGHT0:
 372       case GL_LIGHT1:
 373       case GL_LIGHT2:
 374       case GL_LIGHT3:
 375       case GL_LIGHT4:
 376       case GL_LIGHT5:
 377       case GL_LIGHT6:
 378       case GL_LIGHT7:
 379          if (ctx->Light.Light[cap-GL_LIGHT0].Enabled == state)
 380             return;
 381          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 382          ctx->Light.Light[cap-GL_LIGHT0].Enabled = state;
 383          if (state) {
 384             insert_at_tail(&ctx->Light.EnabledList,
 385                            &ctx->Light.Light[cap-GL_LIGHT0]);
 386          }
 387          else {
 388             remove_from_list(&ctx->Light.Light[cap-GL_LIGHT0]);
 389          }
 390          break;
 391       case GL_LIGHTING:
 392          if (ctx->Light.Enabled == state)
 393             return;
 394          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 395          ctx->Light.Enabled = state;
 396          if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
 397             ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE;
 398          else
 399             ctx->_TriangleCaps &= ~DD_TRI_LIGHT_TWOSIDE;
 400          break;
 401       case GL_LINE_SMOOTH:
 402          if (ctx->Line.SmoothFlag == state)
 403             return;
 404          FLUSH_VERTICES(ctx, _NEW_LINE);
 405          ctx->Line.SmoothFlag = state;
 406          ctx->_TriangleCaps ^= DD_LINE_SMOOTH;
 407          break;
 408       case GL_LINE_STIPPLE:
 409          if (ctx->Line.StippleFlag == state)
 410             return;
 411          FLUSH_VERTICES(ctx, _NEW_LINE);
 412          ctx->Line.StippleFlag = state;
 413          ctx->_TriangleCaps ^= DD_LINE_STIPPLE;
 414          break;
 415       case GL_INDEX_LOGIC_OP:
 416          if (ctx->Color.IndexLogicOpEnabled == state)
 417             return;
 418          FLUSH_VERTICES(ctx, _NEW_COLOR);
 419          ctx->Color.IndexLogicOpEnabled = state;
 420          break;
 421       case GL_COLOR_LOGIC_OP:
 422          if (ctx->Color.ColorLogicOpEnabled == state)
 423             return;
 424          FLUSH_VERTICES(ctx, _NEW_COLOR);
 425          ctx->Color.ColorLogicOpEnabled = state;
 426          break;
 427       case GL_MAP1_COLOR_4:
 428          if (ctx->Eval.Map1Color4 == state)
 429             return;
 430          FLUSH_VERTICES(ctx, _NEW_EVAL);
 431          ctx->Eval.Map1Color4 = state;
 432          break;
 433       case GL_MAP1_INDEX:
 434          if (ctx->Eval.Map1Index == state)
 435             return;
 436          FLUSH_VERTICES(ctx, _NEW_EVAL);
 437          ctx->Eval.Map1Index = state;
 438          break;
 439       case GL_MAP1_NORMAL:
 440          if (ctx->Eval.Map1Normal == state)
 441             return;
 442          FLUSH_VERTICES(ctx, _NEW_EVAL);
 443          ctx->Eval.Map1Normal = state;
 444          break;
 445       case GL_MAP1_TEXTURE_COORD_1:
 446          if (ctx->Eval.Map1TextureCoord1 == state)
 447             return;
 448          FLUSH_VERTICES(ctx, _NEW_EVAL);
 449          ctx->Eval.Map1TextureCoord1 = state;
 450          break;
 451       case GL_MAP1_TEXTURE_COORD_2:
 452          if (ctx->Eval.Map1TextureCoord2 == state)
 453             return;
 454          FLUSH_VERTICES(ctx, _NEW_EVAL);
 455          ctx->Eval.Map1TextureCoord2 = state;
 456          break;
 457       case GL_MAP1_TEXTURE_COORD_3:
 458          if (ctx->Eval.Map1TextureCoord3 == state)
 459             return;
 460          FLUSH_VERTICES(ctx, _NEW_EVAL);
 461          ctx->Eval.Map1TextureCoord3 = state;
 462          break;
 463       case GL_MAP1_TEXTURE_COORD_4:
 464          if (ctx->Eval.Map1TextureCoord4 == state)
 465             return;
 466          FLUSH_VERTICES(ctx, _NEW_EVAL);
 467          ctx->Eval.Map1TextureCoord4 = state;
 468          break;
 469       case GL_MAP1_VERTEX_3:
 470          if (ctx->Eval.Map1Vertex3 == state)
 471             return;
 472          FLUSH_VERTICES(ctx, _NEW_EVAL);
 473          ctx->Eval.Map1Vertex3 = state;
 474          break;
 475       case GL_MAP1_VERTEX_4:
 476          if (ctx->Eval.Map1Vertex4 == state)
 477             return;
 478          FLUSH_VERTICES(ctx, _NEW_EVAL);
 479          ctx->Eval.Map1Vertex4 = state;
 480          break;
 481       case GL_MAP2_COLOR_4:
 482          if (ctx->Eval.Map2Color4 == state)
 483             return;
 484          FLUSH_VERTICES(ctx, _NEW_EVAL);
 485          ctx->Eval.Map2Color4 = state;
 486          break;
 487       case GL_MAP2_INDEX:
 488          if (ctx->Eval.Map2Index == state)
 489             return;
 490          FLUSH_VERTICES(ctx, _NEW_EVAL);
 491          ctx->Eval.Map2Index = state;
 492          break;
 493       case GL_MAP2_NORMAL:
 494          if (ctx->Eval.Map2Normal == state)
 495             return;
 496          FLUSH_VERTICES(ctx, _NEW_EVAL);
 497          ctx->Eval.Map2Normal = state;
 498          break;
 499       case GL_MAP2_TEXTURE_COORD_1:
 500          if (ctx->Eval.Map2TextureCoord1 == state)
 501             return;
 502          FLUSH_VERTICES(ctx, _NEW_EVAL);
 503          ctx->Eval.Map2TextureCoord1 = state;
 504          break;
 505       case GL_MAP2_TEXTURE_COORD_2:
 506          if (ctx->Eval.Map2TextureCoord2 == state)
 507             return;
 508          FLUSH_VERTICES(ctx, _NEW_EVAL);
 509          ctx->Eval.Map2TextureCoord2 = state;
 510          break;
 511       case GL_MAP2_TEXTURE_COORD_3:
 512          if (ctx->Eval.Map2TextureCoord3 == state)
 513             return;
 514          FLUSH_VERTICES(ctx, _NEW_EVAL);
 515          ctx->Eval.Map2TextureCoord3 = state;
 516          break;
 517       case GL_MAP2_TEXTURE_COORD_4:
 518          if (ctx->Eval.Map2TextureCoord4 == state)
 519             return;
 520          FLUSH_VERTICES(ctx, _NEW_EVAL);
 521          ctx->Eval.Map2TextureCoord4 = state;
 522          break;
 523       case GL_MAP2_VERTEX_3:
 524          if (ctx->Eval.Map2Vertex3 == state)
 525             return;
 526          FLUSH_VERTICES(ctx, _NEW_EVAL);
 527          ctx->Eval.Map2Vertex3 = state;
 528          break;
 529       case GL_MAP2_VERTEX_4:
 530          if (ctx->Eval.Map2Vertex4 == state)
 531             return;
 532          FLUSH_VERTICES(ctx, _NEW_EVAL);
 533          ctx->Eval.Map2Vertex4 = state;
 534          break;
 535       case GL_MINMAX:
 536          if (ctx->Pixel.MinMaxEnabled == state)
 537             return;
 538          FLUSH_VERTICES(ctx, _NEW_PIXEL);
 539          ctx->Pixel.MinMaxEnabled = state;
 540          break;
 541       case GL_NORMALIZE:
 542          if (ctx->Transform.Normalize == state)
 543             return;
 544          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 545          ctx->Transform.Normalize = state;
 546          break;
 547       case GL_POINT_SMOOTH:
 548          if (ctx->Point.SmoothFlag == state)
 549             return;
 550          FLUSH_VERTICES(ctx, _NEW_POINT);
 551          ctx->Point.SmoothFlag = state;
 552          ctx->_TriangleCaps ^= DD_POINT_SMOOTH;
 553          break;
 554       case GL_POLYGON_SMOOTH:
 555          if (ctx->Polygon.SmoothFlag == state)
 556             return;
 557          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 558          ctx->Polygon.SmoothFlag = state;
 559          ctx->_TriangleCaps ^= DD_TRI_SMOOTH;
 560          break;
 561       case GL_POLYGON_STIPPLE:
 562          if (ctx->Polygon.StippleFlag == state)
 563             return;
 564          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 565          ctx->Polygon.StippleFlag = state;
 566          ctx->_TriangleCaps ^= DD_TRI_STIPPLE;
 567          break;
 568       case GL_POLYGON_OFFSET_POINT:
 569          if (ctx->Polygon.OffsetPoint == state)
 570             return;
 571          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 572          ctx->Polygon.OffsetPoint = state;
 573          break;
 574       case GL_POLYGON_OFFSET_LINE:
 575          if (ctx->Polygon.OffsetLine == state)
 576             return;
 577          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 578          ctx->Polygon.OffsetLine = state;
 579          break;
 580       case GL_POLYGON_OFFSET_FILL:
 581          /*case GL_POLYGON_OFFSET_EXT:*/
 582          if (ctx->Polygon.OffsetFill == state)
 583             return;
 584          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 585          ctx->Polygon.OffsetFill = state;
 586          break;
 587       case GL_RESCALE_NORMAL_EXT:
 588          if (ctx->Transform.RescaleNormals == state)
 589             return;
 590          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 591          ctx->Transform.RescaleNormals = state;
 592          break;
 593       case GL_SCISSOR_TEST:
 594          if (ctx->Scissor.Enabled == state)
 595             return;
 596          FLUSH_VERTICES(ctx, _NEW_SCISSOR);
 597          ctx->Scissor.Enabled = state;
 598          break;
 599       case GL_SHARED_TEXTURE_PALETTE_EXT:
 600          if (ctx->Texture.SharedPalette == state)
 601             return;
 602          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 603          ctx->Texture.SharedPalette = state;
 604          break;
 605       case GL_STENCIL_TEST:
 606          if (state && ctx->DrawBuffer->Visual.stencilBits == 0) {
 607             _mesa_warning(ctx,
 608                           "glEnable(GL_STENCIL_TEST) but no stencil buffer");
 609             return;
 610          }
 611          if (ctx->Stencil.Enabled == state)
 612             return;
 613          FLUSH_VERTICES(ctx, _NEW_STENCIL);
 614          ctx->Stencil.Enabled = state;
 615          break;
 616       case GL_TEXTURE_1D:
 617          if (!enable_texture(ctx, state, TEXTURE_1D_BIT)) {
 618             return;
 619          }
 620          break;
 621       case GL_TEXTURE_2D:
 622          if (!enable_texture(ctx, state, TEXTURE_2D_BIT)) {
 623             return;
 624          }
 625          break;
 626       case GL_TEXTURE_3D:
 627          if (!enable_texture(ctx, state, TEXTURE_3D_BIT)) {
 628             return;
 629          }
 630          break;
 631       case GL_TEXTURE_GEN_Q:
 632          {
 633             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 634             if (texUnit) {
 635                GLuint newenabled = texUnit->TexGenEnabled & ~Q_BIT;
 636                if (state)
 637                   newenabled |= Q_BIT;
 638                if (texUnit->TexGenEnabled == newenabled)
 639                   return;
 640                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 641                texUnit->TexGenEnabled = newenabled;
 642             }
 643          }
 644          break;
 645       case GL_TEXTURE_GEN_R:
 646          {
 647             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 648             if (texUnit) {
 649                GLuint newenabled = texUnit->TexGenEnabled & ~R_BIT;
 650                if (state)
 651                   newenabled |= R_BIT;
 652                if (texUnit->TexGenEnabled == newenabled)
 653                   return;
 654                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 655                texUnit->TexGenEnabled = newenabled;
 656             }
 657          }
 658          break;
 659       case GL_TEXTURE_GEN_S:
 660          {
 661             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 662             if (texUnit) {
 663                GLuint newenabled = texUnit->TexGenEnabled & ~S_BIT;
 664                if (state)
 665                   newenabled |= S_BIT;
 666                if (texUnit->TexGenEnabled == newenabled)
 667                   return;
 668                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 669                texUnit->TexGenEnabled = newenabled;
 670             }
 671          }
 672          break;
 673       case GL_TEXTURE_GEN_T:
 674          {
 675             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 676             if (texUnit) {
 677                GLuint newenabled = texUnit->TexGenEnabled & ~T_BIT;
 678                if (state)
 679                   newenabled |= T_BIT;
 680                if (texUnit->TexGenEnabled == newenabled)
 681                   return;
 682                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 683                texUnit->TexGenEnabled = newenabled;
 684             }
 685          }
 686          break;
 687
 688       /*
 689        * CLIENT STATE!!!
 690        */
 691       case GL_VERTEX_ARRAY:
 692       case GL_NORMAL_ARRAY:
 693       case GL_COLOR_ARRAY:
 694       case GL_INDEX_ARRAY:
 695       case GL_TEXTURE_COORD_ARRAY:
 696       case GL_EDGE_FLAG_ARRAY:
 697       case GL_FOG_COORDINATE_ARRAY_EXT:
 698       case GL_SECONDARY_COLOR_ARRAY_EXT:
 699       case GL_POINT_SIZE_ARRAY_OES:
 700          client_state( ctx, cap, state );
 701          return;
 702
 703       /* GL_SGI_color_table */
 704       case GL_COLOR_TABLE_SGI:
 705          CHECK_EXTENSION(SGI_color_table, cap);
 706          if (ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION] == state)
 707             return;
 708          FLUSH_VERTICES(ctx, _NEW_PIXEL);
 709          ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION] = state;
 710          break;
 711       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 712          CHECK_EXTENSION(SGI_color_table, cap);
 713          if (ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION] == state)
 714             return;
 715          FLUSH_VERTICES(ctx, _NEW_PIXEL);
 716          ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION] = state;
 717          break;
 718       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 719          CHECK_EXTENSION(SGI_color_table, cap);
 720          if (ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX] == state)
 721             return;
 722          FLUSH_VERTICES(ctx, _NEW_PIXEL);
 723          ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX] = state;
 724          break;
 725       case GL_TEXTURE_COLOR_TABLE_SGI:
 726          CHECK_EXTENSION(SGI_texture_color_table, cap);
 727          if (ctx->Texture.Unit[ctx->Texture.CurrentUnit].ColorTableEnabled == state)
 728             return;
 729          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 730          ctx->Texture.Unit[ctx->Texture.CurrentUnit].ColorTableEnabled = state;
 731          break;
 732
 733       /* GL_EXT_convolution */
 734       case GL_CONVOLUTION_1D:
 735          CHECK_EXTENSION(EXT_convolution, cap);
 736          if (ctx->Pixel.Convolution1DEnabled == state)
 737             return;
 738          FLUSH_VERTICES(ctx, _NEW_PIXEL);
 739          ctx->Pixel.Convolution1DEnabled = state;
 740          break;
 741       case GL_CONVOLUTION_2D:
 742          CHECK_EXTENSION(EXT_convolution, cap);
 743          if (ctx->Pixel.Convolution2DEnabled == state)
 744             return;
 745          FLUSH_VERTICES(ctx, _NEW_PIXEL);
 746          ctx->Pixel.Convolution2DEnabled = state;
 747          break;
 748       case GL_SEPARABLE_2D:
 749          CHECK_EXTENSION(EXT_convolution, cap);
 750          if (ctx->Pixel.Separable2DEnabled == state)
 751             return;
 752          FLUSH_VERTICES(ctx, _NEW_PIXEL);
 753          ctx->Pixel.Separable2DEnabled = state;
 754          break;
 755
 756       /* GL_ARB_texture_cube_map */
 757       case GL_TEXTURE_CUBE_MAP_ARB:
 758          CHECK_EXTENSION(ARB_texture_cube_map, cap);
 759          if (!enable_texture(ctx, state, TEXTURE_CUBE_BIT)) {
 760             return;
 761          }
 762          break;
 763
 764       /* GL_EXT_secondary_color */
 765       case GL_COLOR_SUM_EXT:
 766          CHECK_EXTENSION2(EXT_secondary_color, ARB_vertex_program, cap);
 767          if (ctx->Fog.ColorSumEnabled == state)
 768             return;
 769          FLUSH_VERTICES(ctx, _NEW_FOG);
 770          ctx->Fog.ColorSumEnabled = state;
 771          break;
 772
 773       /* GL_ARB_multisample */
 774       case GL_MULTISAMPLE_ARB:
 775          CHECK_EXTENSION(ARB_multisample, cap);
 776          if (ctx->Multisample.Enabled == state)
 777             return;
 778          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 779          ctx->Multisample.Enabled = state;
 780          break;
 781       case GL_SAMPLE_ALPHA_TO_COVERAGE_ARB:
 782          CHECK_EXTENSION(ARB_multisample, cap);
 783          if (ctx->Multisample.SampleAlphaToCoverage == state)
 784             return;
 785          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 786          ctx->Multisample.SampleAlphaToCoverage = state;
 787          break;
 788       case GL_SAMPLE_ALPHA_TO_ONE_ARB:
 789          CHECK_EXTENSION(ARB_multisample, cap);
 790          if (ctx->Multisample.SampleAlphaToOne == state)
 791             return;
 792          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 793          ctx->Multisample.SampleAlphaToOne = state;
 794          break;
 795       case GL_SAMPLE_COVERAGE_ARB:
 796          CHECK_EXTENSION(ARB_multisample, cap);
 797          if (ctx->Multisample.SampleCoverage == state)
 798             return;
 799          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 800          ctx->Multisample.SampleCoverage = state;
 801          break;
 802       case GL_SAMPLE_COVERAGE_INVERT_ARB:
 803          CHECK_EXTENSION(ARB_multisample, cap);
 804          if (ctx->Multisample.SampleCoverageInvert == state)
 805             return;
 806          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 807          ctx->Multisample.SampleCoverageInvert = state;
 808          break;
 809
 810       /* GL_IBM_rasterpos_clip */
 811       case GL_RASTER_POSITION_UNCLIPPED_IBM:
 812          CHECK_EXTENSION(IBM_rasterpos_clip, cap);
 813          if (ctx->Transform.RasterPositionUnclipped == state)
 814             return;
 815          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 816          ctx->Transform.RasterPositionUnclipped = state;
 817          break;
 818
 819       /* GL_NV_point_sprite */
 820       case GL_POINT_SPRITE_NV:
 821          CHECK_EXTENSION2(NV_point_sprite, ARB_point_sprite, cap);
 822          if (ctx->Point.PointSprite == state)
 823             return;
 824          FLUSH_VERTICES(ctx, _NEW_POINT);
 825          ctx->Point.PointSprite = state;
 826          break;
 827
 828 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 829       case GL_VERTEX_PROGRAM_ARB:
 830          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 831          if (ctx->VertexProgram.Enabled == state)
 832             return;
 833          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 834          ctx->VertexProgram.Enabled = state;
 835          break;
 836       case GL_VERTEX_PROGRAM_POINT_SIZE_ARB:
 837          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 838          if (ctx->VertexProgram.PointSizeEnabled == state)
 839             return;
 840          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 841          ctx->VertexProgram.PointSizeEnabled = state;
 842          break;
 843       case GL_VERTEX_PROGRAM_TWO_SIDE_ARB:
 844          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 845          if (ctx->VertexProgram.TwoSideEnabled == state)
 846             return;
 847          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 848          ctx->VertexProgram.TwoSideEnabled = state;
 849          break;
 850 #endif
 851 #if FEATURE_NV_vertex_program
 852       case GL_MAP1_VERTEX_ATTRIB0_4_NV:
 853       case GL_MAP1_VERTEX_ATTRIB1_4_NV:
 854       case GL_MAP1_VERTEX_ATTRIB2_4_NV:
 855       case GL_MAP1_VERTEX_ATTRIB3_4_NV:
 856       case GL_MAP1_VERTEX_ATTRIB4_4_NV:
 857       case GL_MAP1_VERTEX_ATTRIB5_4_NV:
 858       case GL_MAP1_VERTEX_ATTRIB6_4_NV:
 859       case GL_MAP1_VERTEX_ATTRIB7_4_NV:
 860       case GL_MAP1_VERTEX_ATTRIB8_4_NV:
 861       case GL_MAP1_VERTEX_ATTRIB9_4_NV:
 862       case GL_MAP1_VERTEX_ATTRIB10_4_NV:
 863       case GL_MAP1_VERTEX_ATTRIB11_4_NV:
 864       case GL_MAP1_VERTEX_ATTRIB12_4_NV:
 865       case GL_MAP1_VERTEX_ATTRIB13_4_NV:
 866       case GL_MAP1_VERTEX_ATTRIB14_4_NV:
 867       case GL_MAP1_VERTEX_ATTRIB15_4_NV:
 868          CHECK_EXTENSION(NV_vertex_program, cap);
 869          {
 870             const GLuint map = (GLuint) (cap - GL_MAP1_VERTEX_ATTRIB0_4_NV);
 871             FLUSH_VERTICES(ctx, _NEW_EVAL);
 872             ctx->Eval.Map1Attrib[map] = state;
 873          }
 874          break;
 875       case GL_MAP2_VERTEX_ATTRIB0_4_NV:
 876       case GL_MAP2_VERTEX_ATTRIB1_4_NV:
 877       case GL_MAP2_VERTEX_ATTRIB2_4_NV:
 878       case GL_MAP2_VERTEX_ATTRIB3_4_NV:
 879       case GL_MAP2_VERTEX_ATTRIB4_4_NV:
 880       case GL_MAP2_VERTEX_ATTRIB5_4_NV:
 881       case GL_MAP2_VERTEX_ATTRIB6_4_NV:
 882       case GL_MAP2_VERTEX_ATTRIB7_4_NV:
 883       case GL_MAP2_VERTEX_ATTRIB8_4_NV:
 884       case GL_MAP2_VERTEX_ATTRIB9_4_NV:
 885       case GL_MAP2_VERTEX_ATTRIB10_4_NV:
 886       case GL_MAP2_VERTEX_ATTRIB11_4_NV:
 887       case GL_MAP2_VERTEX_ATTRIB12_4_NV:
 888       case GL_MAP2_VERTEX_ATTRIB13_4_NV:
 889       case GL_MAP2_VERTEX_ATTRIB14_4_NV:
 890       case GL_MAP2_VERTEX_ATTRIB15_4_NV:
 891          CHECK_EXTENSION(NV_vertex_program, cap);
 892          {
 893             const GLuint map = (GLuint) (cap - GL_MAP2_VERTEX_ATTRIB0_4_NV);
 894             FLUSH_VERTICES(ctx, _NEW_EVAL);
 895             ctx->Eval.Map2Attrib[map] = state;
 896          }
 897          break;
 898 #endif /* FEATURE_NV_vertex_program */
 899
 900 #if FEATURE_NV_fragment_program
 901       case GL_FRAGMENT_PROGRAM_NV:
 902          CHECK_EXTENSION(NV_fragment_program, cap);
 903          if (ctx->FragmentProgram.Enabled == state)
 904             return;
 905          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 906          ctx->FragmentProgram.Enabled = state;
 907          break;
 908 #endif /* FEATURE_NV_fragment_program */
 909
 910       /* GL_NV_texture_rectangle */
 911       case GL_TEXTURE_RECTANGLE_NV:
 912          CHECK_EXTENSION(NV_texture_rectangle, cap);
 913          if (!enable_texture(ctx, state, TEXTURE_RECT_BIT)) {
 914             return;
 915          }
 916          break;
 917
 918       /* GL_EXT_stencil_two_side */
 919       case GL_STENCIL_TEST_TWO_SIDE_EXT:
 920          CHECK_EXTENSION(EXT_stencil_two_side, cap);
 921          if (ctx->Stencil.TestTwoSide == state)
 922             return;
 923          FLUSH_VERTICES(ctx, _NEW_STENCIL);
 924          ctx->Stencil.TestTwoSide = state;
 925          if (state)
 926             ctx->_TriangleCaps |= DD_TRI_TWOSTENCIL;
 927          else
 928             ctx->_TriangleCaps &= ~DD_TRI_TWOSTENCIL;
 929          break;
 930
 931 #if FEATURE_ARB_fragment_program
 932       case GL_FRAGMENT_PROGRAM_ARB:
 933          CHECK_EXTENSION(ARB_fragment_program, cap);
 934          if (ctx->FragmentProgram.Enabled == state)
 935             return;
 936          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 937          ctx->FragmentProgram.Enabled = state;
 938          break;
 939 #endif /* FEATURE_ARB_fragment_program */
 940
 941       /* GL_EXT_depth_bounds_test */
 942       case GL_DEPTH_BOUNDS_TEST_EXT:
 943          CHECK_EXTENSION(EXT_depth_bounds_test, cap);
 944          if (state && ctx->DrawBuffer->Visual.depthBits == 0) {
 945             _mesa_warning(ctx,
 946                    "glEnable(GL_DEPTH_BOUNDS_TEST_EXT) but no depth buffer");
 947             return;
 948          }
 949          if (ctx->Depth.BoundsTest == state)
 950             return;
 951          FLUSH_VERTICES(ctx, _NEW_DEPTH);
 952          ctx->Depth.BoundsTest = state;
 953          break;
 954
 955       /* GL_MESA_program_debug */
 956       case GL_FRAGMENT_PROGRAM_CALLBACK_MESA:
 957          CHECK_EXTENSION(MESA_program_debug, cap);
 958          ctx->FragmentProgram.CallbackEnabled = state;
 959          break;
 960       case GL_VERTEX_PROGRAM_CALLBACK_MESA:
 961          CHECK_EXTENSION(MESA_program_debug, cap);
 962          ctx->VertexProgram.CallbackEnabled = state;
 963          break;
 964
 965 #if FEATURE_ATI_fragment_shader
 966       case GL_FRAGMENT_SHADER_ATI:
 967         CHECK_EXTENSION(ATI_fragment_shader, cap);
 968         if (ctx->ATIFragmentShader.Enabled == state)
 969           return;
 970         FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 971         ctx->ATIFragmentShader.Enabled = state;
 972         break;
 973 #endif
 974
 975       /* GL_MESA_texture_array */
 976       case GL_TEXTURE_1D_ARRAY_EXT:
 977          CHECK_EXTENSION(MESA_texture_array, cap);
 978          if (!enable_texture(ctx, state, TEXTURE_1D_ARRAY_BIT)) {
 979             return;
 980          }
 981          break;
 982
 983       case GL_TEXTURE_2D_ARRAY_EXT:
 984          CHECK_EXTENSION(MESA_texture_array, cap);
 985          if (!enable_texture(ctx, state, TEXTURE_2D_ARRAY_BIT)) {
 986             return;
 987          }
 988          break;
 989
 990       default:
 991          _mesa_error(ctx, GL_INVALID_ENUM,
 992                      "%s(0x%x)", state ? "glEnable" : "glDisable", cap);
 993          return;
 994    }
 995
 996    if (ctx->Driver.Enable) {
 997       ctx->Driver.Enable( ctx, cap, state );
 998    }
 999 }
1000
1001
1002 /**
1003  * Enable GL capability.  Called by glEnable()
1004  * \param cap  state to enable.
1005  */
1006 void GLAPIENTRY
1007 _mesa_Enable( GLenum cap )
1008 {
1009    GET_CURRENT_CONTEXT(ctx);
1010    ASSERT_OUTSIDE_BEGIN_END(ctx);
1011
1012    _mesa_set_enable( ctx, cap, GL_TRUE );
1013 }
1014
1015
1016 /**
1017  * Disable GL capability.  Called by glDisable()
1018  * \param cap  state to disable.
1019  */
1020 void GLAPIENTRY
1021 _mesa_Disable( GLenum cap )
1022 {
1023    GET_CURRENT_CONTEXT(ctx);
1024    ASSERT_OUTSIDE_BEGIN_END(ctx);
1025
1026    _mesa_set_enable( ctx, cap, GL_FALSE );
1027 }
1028
1029
1030 #undef CHECK_EXTENSION
1031 #define CHECK_EXTENSION(EXTNAME)                        \
1032    if (!ctx->Extensions.EXTNAME) {                      \
1033       _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabled"); \
1034       return GL_FALSE;                                  \
1035    }
1036
1037 #undef CHECK_EXTENSION2
1038 #define CHECK_EXTENSION2(EXT1, EXT2)                            \
1039    if (!ctx->Extensions.EXT1 && !ctx->Extensions.EXT2) {        \
1040       _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabled");         \
1041       return GL_FALSE;                                          \
1042    }
1043
1044
1045 /**
1046  * Helper function to determine whether a texture target is enabled.
1047  */
1048 static GLboolean
1049 is_texture_enabled(GLcontext *ctx, GLbitfield bit)
1050 {
1051    const struct gl_texture_unit *const texUnit =
1052        &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
1053    return (texUnit->Enabled & bit) ? GL_TRUE : GL_FALSE;
1054 }
1055
1056
1057 /**
1058  * Return simple enable/disable state.
1059  *
1060  * \param cap  state variable to query.
1061  *
1062  * Returns the state of the specified capability from the current GL context.
1063  * For the capabilities associated with extensions verifies that those
1064  * extensions are effectively present before reporting.
1065  */
1066 GLboolean GLAPIENTRY
1067 _mesa_IsEnabled( GLenum cap )
1068 {
1069    GET_CURRENT_CONTEXT(ctx);
1070    switch (cap) {
1071       case GL_ALPHA_TEST:
1072          return ctx->Color.AlphaEnabled;
1073       case GL_AUTO_NORMAL:
1074          return ctx->Eval.AutoNormal;
1075       case GL_BLEND:
1076          return ctx->Color.BlendEnabled;
1077       case GL_CLIP_PLANE0:
1078       case GL_CLIP_PLANE1:
1079       case GL_CLIP_PLANE2:
1080       case GL_CLIP_PLANE3:
1081       case GL_CLIP_PLANE4:
1082       case GL_CLIP_PLANE5:
1083          return (ctx->Transform.ClipPlanesEnabled >> (cap - GL_CLIP_PLANE0)) & 1;
1084       case GL_COLOR_MATERIAL:
1085          return ctx->Light.ColorMaterialEnabled;
1086       case GL_CULL_FACE:
1087          return ctx->Polygon.CullFlag;
1088       case GL_DEPTH_TEST:
1089          return ctx->Depth.Test;
1090       case GL_DITHER:
1091          return ctx->Color.DitherFlag;
1092       case GL_FOG:
1093          return ctx->Fog.Enabled;
1094       case GL_LIGHTING:
1095          return ctx->Light.Enabled;
1096       case GL_LIGHT0:
1097       case GL_LIGHT1:
1098       case GL_LIGHT2:
1099       case GL_LIGHT3:
1100       case GL_LIGHT4:
1101       case GL_LIGHT5:
1102       case GL_LIGHT6:
1103       case GL_LIGHT7:
1104          return ctx->Light.Light[cap-GL_LIGHT0].Enabled;
1105       case GL_LINE_SMOOTH:
1106          return ctx->Line.SmoothFlag;
1107       case GL_LINE_STIPPLE:
1108          return ctx->Line.StippleFlag;
1109       case GL_INDEX_LOGIC_OP:
1110          return ctx->Color.IndexLogicOpEnabled;
1111       case GL_COLOR_LOGIC_OP:
1112          return ctx->Color.ColorLogicOpEnabled;
1113       case GL_MAP1_COLOR_4:
1114          return ctx->Eval.Map1Color4;
1115       case GL_MAP1_INDEX:
1116          return ctx->Eval.Map1Index;
1117       case GL_MAP1_NORMAL:
1118          return ctx->Eval.Map1Normal;
1119       case GL_MAP1_TEXTURE_COORD_1:
1120          return ctx->Eval.Map1TextureCoord1;
1121       case GL_MAP1_TEXTURE_COORD_2:
1122          return ctx->Eval.Map1TextureCoord2;
1123       case GL_MAP1_TEXTURE_COORD_3:
1124          return ctx->Eval.Map1TextureCoord3;
1125       case GL_MAP1_TEXTURE_COORD_4:
1126          return ctx->Eval.Map1TextureCoord4;
1127       case GL_MAP1_VERTEX_3:
1128          return ctx->Eval.Map1Vertex3;
1129       case GL_MAP1_VERTEX_4:
1130          return ctx->Eval.Map1Vertex4;
1131       case GL_MAP2_COLOR_4:
1132          return ctx->Eval.Map2Color4;
1133       case GL_MAP2_INDEX:
1134          return ctx->Eval.Map2Index;
1135       case GL_MAP2_NORMAL:
1136          return ctx->Eval.Map2Normal;
1137       case GL_MAP2_TEXTURE_COORD_1:
1138          return ctx->Eval.Map2TextureCoord1;
1139       case GL_MAP2_TEXTURE_COORD_2:
1140          return ctx->Eval.Map2TextureCoord2;
1141       case GL_MAP2_TEXTURE_COORD_3:
1142          return ctx->Eval.Map2TextureCoord3;
1143       case GL_MAP2_TEXTURE_COORD_4:
1144          return ctx->Eval.Map2TextureCoord4;
1145       case GL_MAP2_VERTEX_3:
1146          return ctx->Eval.Map2Vertex3;
1147       case GL_MAP2_VERTEX_4:
1148          return ctx->Eval.Map2Vertex4;
1149       case GL_NORMALIZE:
1150          return ctx->Transform.Normalize;
1151       case GL_POINT_SMOOTH:
1152          return ctx->Point.SmoothFlag;
1153       case GL_POLYGON_SMOOTH:
1154          return ctx->Polygon.SmoothFlag;
1155       case GL_POLYGON_STIPPLE:
1156          return ctx->Polygon.StippleFlag;
1157       case GL_POLYGON_OFFSET_POINT:
1158          return ctx->Polygon.OffsetPoint;
1159       case GL_POLYGON_OFFSET_LINE:
1160          return ctx->Polygon.OffsetLine;
1161       case GL_POLYGON_OFFSET_FILL:
1162       /*case GL_POLYGON_OFFSET_EXT:*/
1163          return ctx->Polygon.OffsetFill;
1164       case GL_RESCALE_NORMAL_EXT:
1165          return ctx->Transform.RescaleNormals;
1166       case GL_SCISSOR_TEST:
1167          return ctx->Scissor.Enabled;
1168       case GL_SHARED_TEXTURE_PALETTE_EXT:
1169          return ctx->Texture.SharedPalette;
1170       case GL_STENCIL_TEST:
1171          return ctx->Stencil.Enabled;
1172       case GL_TEXTURE_1D:
1173          return is_texture_enabled(ctx, TEXTURE_1D_BIT);
1174       case GL_TEXTURE_2D:
1175          return is_texture_enabled(ctx, TEXTURE_2D_BIT);
1176       case GL_TEXTURE_3D:
1177          return is_texture_enabled(ctx, TEXTURE_3D_BIT);
1178       case GL_TEXTURE_GEN_Q:
1179          {
1180             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1181             if (texUnit) {
1182                return (texUnit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE;
1183             }
1184          }
1185          return GL_FALSE;
1186       case GL_TEXTURE_GEN_R:
1187          {
1188             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1189             if (texUnit) {
1190                return (texUnit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE;
1191             }
1192          }
1193          return GL_FALSE;
1194       case GL_TEXTURE_GEN_S:
1195          {
1196             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1197             if (texUnit) {
1198                return (texUnit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE;
1199             }
1200          }
1201          return GL_FALSE;
1202       case GL_TEXTURE_GEN_T:
1203          {
1204             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1205             if (texUnit) {
1206                return (texUnit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE;
1207             }
1208          }
1209          return GL_FALSE;
1210
1211       /*
1212        * CLIENT STATE!!!
1213        */
1214       case GL_VERTEX_ARRAY:
1215          return (ctx->Array.ArrayObj->Vertex.Enabled != 0);
1216       case GL_NORMAL_ARRAY:
1217          return (ctx->Array.ArrayObj->Normal.Enabled != 0);
1218       case GL_COLOR_ARRAY:
1219          return (ctx->Array.ArrayObj->Color.Enabled != 0);
1220       case GL_INDEX_ARRAY:
1221          return (ctx->Array.ArrayObj->Index.Enabled != 0);
1222       case GL_TEXTURE_COORD_ARRAY:
1223          return (ctx->Array.ArrayObj->TexCoord[ctx->Array.ActiveTexture].Enabled != 0);
1224       case GL_EDGE_FLAG_ARRAY:
1225          return (ctx->Array.ArrayObj->EdgeFlag.Enabled != 0);
1226       case GL_FOG_COORDINATE_ARRAY_EXT:
1227          CHECK_EXTENSION(EXT_fog_coord);
1228          return (ctx->Array.ArrayObj->FogCoord.Enabled != 0);
1229       case GL_SECONDARY_COLOR_ARRAY_EXT:
1230          CHECK_EXTENSION(EXT_secondary_color);
1231          return (ctx->Array.ArrayObj->SecondaryColor.Enabled != 0);
1232 #if FEATURE_point_size_array
1233       case GL_POINT_SIZE_ARRAY_OES:
1234          return (ctx->Array.ArrayObj->PointSize.Enabled != 0);
1235 #endif
1236
1237       /* GL_EXT_histogram */
1238       case GL_HISTOGRAM:
1239          CHECK_EXTENSION(EXT_histogram);
1240          return ctx->Pixel.HistogramEnabled;
1241       case GL_MINMAX:
1242          CHECK_EXTENSION(EXT_histogram);
1243          return ctx->Pixel.MinMaxEnabled;
1244
1245       /* GL_SGI_color_table */
1246       case GL_COLOR_TABLE_SGI:
1247          CHECK_EXTENSION(SGI_color_table);
1248          return ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION];
1249       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
1250          CHECK_EXTENSION(SGI_color_table);
1251          return ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION];
1252       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
1253          CHECK_EXTENSION(SGI_color_table);
1254          return ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX];
1255
1256       /* GL_SGI_texture_color_table */
1257       case GL_TEXTURE_COLOR_TABLE_SGI:
1258          CHECK_EXTENSION(SGI_texture_color_table);
1259          return ctx->Texture.Unit[ctx->Texture.CurrentUnit].ColorTableEnabled;
1260
1261       /* GL_EXT_convolution */
1262       case GL_CONVOLUTION_1D:
1263          CHECK_EXTENSION(EXT_convolution);
1264          return ctx->Pixel.Convolution1DEnabled;
1265       case GL_CONVOLUTION_2D:
1266          CHECK_EXTENSION(EXT_convolution);
1267          return ctx->Pixel.Convolution2DEnabled;
1268       case GL_SEPARABLE_2D:
1269          CHECK_EXTENSION(EXT_convolution);
1270          return ctx->Pixel.Separable2DEnabled;
1271
1272       /* GL_ARB_texture_cube_map */
1273       case GL_TEXTURE_CUBE_MAP_ARB:
1274          CHECK_EXTENSION(ARB_texture_cube_map);
1275          return is_texture_enabled(ctx, TEXTURE_CUBE_BIT);
1276
1277       /* GL_EXT_secondary_color */
1278       case GL_COLOR_SUM_EXT:
1279          CHECK_EXTENSION2(EXT_secondary_color, ARB_vertex_program);
1280          return ctx->Fog.ColorSumEnabled;
1281
1282       /* GL_ARB_multisample */
1283       case GL_MULTISAMPLE_ARB:
1284          CHECK_EXTENSION(ARB_multisample);
1285          return ctx->Multisample.Enabled;
1286       case GL_SAMPLE_ALPHA_TO_COVERAGE_ARB:
1287          CHECK_EXTENSION(ARB_multisample);
1288          return ctx->Multisample.SampleAlphaToCoverage;
1289       case GL_SAMPLE_ALPHA_TO_ONE_ARB:
1290          CHECK_EXTENSION(ARB_multisample);
1291          return ctx->Multisample.SampleAlphaToOne;
1292       case GL_SAMPLE_COVERAGE_ARB:
1293          CHECK_EXTENSION(ARB_multisample);
1294          return ctx->Multisample.SampleCoverage;
1295       case GL_SAMPLE_COVERAGE_INVERT_ARB:
1296          CHECK_EXTENSION(ARB_multisample);
1297          return ctx->Multisample.SampleCoverageInvert;
1298
1299       /* GL_IBM_rasterpos_clip */
1300       case GL_RASTER_POSITION_UNCLIPPED_IBM:
1301          CHECK_EXTENSION(IBM_rasterpos_clip);
1302          return ctx->Transform.RasterPositionUnclipped;
1303
1304       /* GL_NV_point_sprite */
1305       case GL_POINT_SPRITE_NV:
1306          CHECK_EXTENSION2(NV_point_sprite, ARB_point_sprite)
1307          return ctx->Point.PointSprite;
1308
1309 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
1310       case GL_VERTEX_PROGRAM_ARB:
1311          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1312          return ctx->VertexProgram.Enabled;
1313       case GL_VERTEX_PROGRAM_POINT_SIZE_ARB:
1314          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1315          return ctx->VertexProgram.PointSizeEnabled;
1316       case GL_VERTEX_PROGRAM_TWO_SIDE_ARB:
1317          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1318          return ctx->VertexProgram.TwoSideEnabled;
1319 #endif
1320 #if FEATURE_NV_vertex_program
1321       case GL_VERTEX_ATTRIB_ARRAY0_NV:
1322       case GL_VERTEX_ATTRIB_ARRAY1_NV:
1323       case GL_VERTEX_ATTRIB_ARRAY2_NV:
1324       case GL_VERTEX_ATTRIB_ARRAY3_NV:
1325       case GL_VERTEX_ATTRIB_ARRAY4_NV:
1326       case GL_VERTEX_ATTRIB_ARRAY5_NV:
1327       case GL_VERTEX_ATTRIB_ARRAY6_NV:
1328       case GL_VERTEX_ATTRIB_ARRAY7_NV:
1329       case GL_VERTEX_ATTRIB_ARRAY8_NV:
1330       case GL_VERTEX_ATTRIB_ARRAY9_NV:
1331       case GL_VERTEX_ATTRIB_ARRAY10_NV:
1332       case GL_VERTEX_ATTRIB_ARRAY11_NV:
1333       case GL_VERTEX_ATTRIB_ARRAY12_NV:
1334       case GL_VERTEX_ATTRIB_ARRAY13_NV:
1335       case GL_VERTEX_ATTRIB_ARRAY14_NV:
1336       case GL_VERTEX_ATTRIB_ARRAY15_NV:
1337          CHECK_EXTENSION(NV_vertex_program);
1338          {
1339             GLint n = (GLint) cap - GL_VERTEX_ATTRIB_ARRAY0_NV;
1340             return (ctx->Array.ArrayObj->VertexAttrib[n].Enabled != 0);
1341          }
1342       case GL_MAP1_VERTEX_ATTRIB0_4_NV:
1343       case GL_MAP1_VERTEX_ATTRIB1_4_NV:
1344       case GL_MAP1_VERTEX_ATTRIB2_4_NV:
1345       case GL_MAP1_VERTEX_ATTRIB3_4_NV:
1346       case GL_MAP1_VERTEX_ATTRIB4_4_NV:
1347       case GL_MAP1_VERTEX_ATTRIB5_4_NV:
1348       case GL_MAP1_VERTEX_ATTRIB6_4_NV:
1349       case GL_MAP1_VERTEX_ATTRIB7_4_NV:
1350       case GL_MAP1_VERTEX_ATTRIB8_4_NV:
1351       case GL_MAP1_VERTEX_ATTRIB9_4_NV:
1352       case GL_MAP1_VERTEX_ATTRIB10_4_NV:
1353       case GL_MAP1_VERTEX_ATTRIB11_4_NV:
1354       case GL_MAP1_VERTEX_ATTRIB12_4_NV:
1355       case GL_MAP1_VERTEX_ATTRIB13_4_NV:
1356       case GL_MAP1_VERTEX_ATTRIB14_4_NV:
1357       case GL_MAP1_VERTEX_ATTRIB15_4_NV:
1358          CHECK_EXTENSION(NV_vertex_program);
1359          {
1360             const GLuint map = (GLuint) (cap - GL_MAP1_VERTEX_ATTRIB0_4_NV);
1361             return ctx->Eval.Map1Attrib[map];
1362          }
1363       case GL_MAP2_VERTEX_ATTRIB0_4_NV:
1364       case GL_MAP2_VERTEX_ATTRIB1_4_NV:
1365       case GL_MAP2_VERTEX_ATTRIB2_4_NV:
1366       case GL_MAP2_VERTEX_ATTRIB3_4_NV:
1367       case GL_MAP2_VERTEX_ATTRIB4_4_NV:
1368       case GL_MAP2_VERTEX_ATTRIB5_4_NV:
1369       case GL_MAP2_VERTEX_ATTRIB6_4_NV:
1370       case GL_MAP2_VERTEX_ATTRIB7_4_NV:
1371       case GL_MAP2_VERTEX_ATTRIB8_4_NV:
1372       case GL_MAP2_VERTEX_ATTRIB9_4_NV:
1373       case GL_MAP2_VERTEX_ATTRIB10_4_NV:
1374       case GL_MAP2_VERTEX_ATTRIB11_4_NV:
1375       case GL_MAP2_VERTEX_ATTRIB12_4_NV:
1376       case GL_MAP2_VERTEX_ATTRIB13_4_NV:
1377       case GL_MAP2_VERTEX_ATTRIB14_4_NV:
1378       case GL_MAP2_VERTEX_ATTRIB15_4_NV:
1379          CHECK_EXTENSION(NV_vertex_program);
1380          {
1381             const GLuint map = (GLuint) (cap - GL_MAP2_VERTEX_ATTRIB0_4_NV);
1382             return ctx->Eval.Map2Attrib[map];
1383          }
1384 #endif /* FEATURE_NV_vertex_program */
1385
1386 #if FEATURE_NV_fragment_program
1387       case GL_FRAGMENT_PROGRAM_NV:
1388          CHECK_EXTENSION(NV_fragment_program);
1389          return ctx->FragmentProgram.Enabled;
1390 #endif /* FEATURE_NV_fragment_program */
1391
1392       /* GL_NV_texture_rectangle */
1393       case GL_TEXTURE_RECTANGLE_NV:
1394          CHECK_EXTENSION(NV_texture_rectangle);
1395          return is_texture_enabled(ctx, TEXTURE_RECT_BIT);
1396
1397       /* GL_EXT_stencil_two_side */
1398       case GL_STENCIL_TEST_TWO_SIDE_EXT:
1399          CHECK_EXTENSION(EXT_stencil_two_side);
1400          return ctx->Stencil.TestTwoSide;
1401
1402 #if FEATURE_ARB_fragment_program
1403       case GL_FRAGMENT_PROGRAM_ARB:
1404          return ctx->FragmentProgram.Enabled;
1405 #endif /* FEATURE_ARB_fragment_program */
1406
1407       /* GL_EXT_depth_bounds_test */
1408       case GL_DEPTH_BOUNDS_TEST_EXT:
1409          CHECK_EXTENSION(EXT_depth_bounds_test);
1410          return ctx->Depth.BoundsTest;
1411
1412       /* GL_MESA_program_debug */
1413       case GL_FRAGMENT_PROGRAM_CALLBACK_MESA:
1414          CHECK_EXTENSION(MESA_program_debug);
1415          return ctx->FragmentProgram.CallbackEnabled;
1416       case GL_VERTEX_PROGRAM_CALLBACK_MESA:
1417          CHECK_EXTENSION(MESA_program_debug);
1418          return ctx->VertexProgram.CallbackEnabled;
1419 #if FEATURE_ATI_fragment_shader
1420       case GL_FRAGMENT_SHADER_ATI:
1421          CHECK_EXTENSION(ATI_fragment_shader);
1422          return ctx->ATIFragmentShader.Enabled;
1423 #endif /* FEATURE_ATI_fragment_shader */
1424       default:
1425          _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabled(0x%x)", (int) cap);
1426          return GL_FALSE;
1427    }
1428 }