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