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  *
   9  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a
  12  * copy of this software and associated documentation files (the "Software"),
  13  * to deal in the Software without restriction, including without limitation
  14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15  * and/or sell copies of the Software, and to permit persons to whom the
  16  * Software is furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included
  19  * in all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  22  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  24  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  25  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  26  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29
  30 #include "glheader.h"
  31 #include "clip.h"
  32 #include "context.h"
  33 #include "enable.h"
  34 #include "light.h"
  35 #include "simple_list.h"
  36 #include "mfeatures.h"
  37 #include "mtypes.h"
  38 #include "enums.h"
  39 #include "api_arrayelt.h"
  40 #include "texstate.h"
  41 #include "drivers/common/meta.h"
  42
  43
  44
  45 #define CHECK_EXTENSION(EXTNAME, CAP)                                   \
  46    if (!ctx->Extensions.EXTNAME) {                                      \
  47       goto invalid_enum_error;                                          \
  48    }
  49
  50
  51 /**
  52  * Helper to enable/disable client-side state.
  53  */
  54 static void
  55 client_state(struct gl_context *ctx, GLenum cap, GLboolean state)
  56 {
  57    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
  58    GLbitfield64 flag;
  59    GLboolean *var;
  60
  61    switch (cap) {
  62       case GL_VERTEX_ARRAY:
  63          var = &arrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled;
  64          flag = VERT_BIT_POS;
  65          break;
  66       case GL_NORMAL_ARRAY:
  67          var = &arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled;
  68          flag = VERT_BIT_NORMAL;
  69          break;
  70       case GL_COLOR_ARRAY:
  71          var = &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled;
  72          flag = VERT_BIT_COLOR0;
  73          break;
  74       case GL_INDEX_ARRAY:
  75          var = &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled;
  76          flag = VERT_BIT_COLOR_INDEX;
  77          break;
  78       case GL_TEXTURE_COORD_ARRAY:
  79          var = &arrayObj->VertexAttrib[VERT_ATTRIB_TEX(ctx->Array.ActiveTexture)].Enabled;
  80          flag = VERT_BIT_TEX(ctx->Array.ActiveTexture);
  81          break;
  82       case GL_EDGE_FLAG_ARRAY:
  83          var = &arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled;
  84          flag = VERT_BIT_EDGEFLAG;
  85          break;
  86       case GL_FOG_COORDINATE_ARRAY_EXT:
  87          var = &arrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled;
  88          flag = VERT_BIT_FOG;
  89          break;
  90       case GL_SECONDARY_COLOR_ARRAY_EXT:
  91          var = &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled;
  92          flag = VERT_BIT_COLOR1;
  93          break;
  94
  95       case GL_POINT_SIZE_ARRAY_OES:
  96          var = &arrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Enabled;
  97          flag = VERT_BIT_POINT_SIZE;
  98          break;
  99
 100       case GL_VERTEX_ATTRIB_ARRAY0_NV:
 101       case GL_VERTEX_ATTRIB_ARRAY1_NV:
 102       case GL_VERTEX_ATTRIB_ARRAY2_NV:
 103       case GL_VERTEX_ATTRIB_ARRAY3_NV:
 104       case GL_VERTEX_ATTRIB_ARRAY4_NV:
 105       case GL_VERTEX_ATTRIB_ARRAY5_NV:
 106       case GL_VERTEX_ATTRIB_ARRAY6_NV:
 107       case GL_VERTEX_ATTRIB_ARRAY7_NV:
 108       case GL_VERTEX_ATTRIB_ARRAY8_NV:
 109       case GL_VERTEX_ATTRIB_ARRAY9_NV:
 110       case GL_VERTEX_ATTRIB_ARRAY10_NV:
 111       case GL_VERTEX_ATTRIB_ARRAY11_NV:
 112       case GL_VERTEX_ATTRIB_ARRAY12_NV:
 113       case GL_VERTEX_ATTRIB_ARRAY13_NV:
 114       case GL_VERTEX_ATTRIB_ARRAY14_NV:
 115       case GL_VERTEX_ATTRIB_ARRAY15_NV:
 116          CHECK_EXTENSION(NV_vertex_program, cap);
 117          {
 118             GLint n = (GLint) cap - GL_VERTEX_ATTRIB_ARRAY0_NV;
 119             ASSERT(VERT_ATTRIB_GENERIC(n) < Elements(arrayObj->VertexAttrib));
 120             var = &arrayObj->VertexAttrib[VERT_ATTRIB_GENERIC(n)].Enabled;
 121             flag = VERT_BIT_GENERIC(n);
 122          }
 123          break;
 124
 125       /* GL_NV_primitive_restart */
 126       case GL_PRIMITIVE_RESTART_NV:
 127          if (!ctx->Extensions.NV_primitive_restart) {
 128             goto invalid_enum_error;
 129          }
 130          var = &ctx->Array.PrimitiveRestart;
 131          flag = 0;
 132          break;
 133
 134       default:
 135          goto invalid_enum_error;
 136    }
 137
 138    if (*var == state)
 139       return;
 140
 141    FLUSH_VERTICES(ctx, _NEW_ARRAY);
 142
 143    _ae_invalidate_state(ctx, _NEW_ARRAY);
 144
 145    *var = state;
 146
 147    if (state)
 148       arrayObj->_Enabled |= flag;
 149    else
 150       arrayObj->_Enabled &= ~flag;
 151
 152    arrayObj->NewArrays |= flag;
 153
 154    if (ctx->Driver.Enable) {
 155       ctx->Driver.Enable( ctx, cap, state );
 156    }
 157
 158    return;
 159
 160 invalid_enum_error:
 161    _mesa_error(ctx, GL_INVALID_ENUM, "gl%sClientState(%s)",
 162                state ? "Enable" : "Disable", _mesa_lookup_enum_by_nr(cap));
 163 }
 164
 165
 166 /**
 167  * Enable GL capability.
 168  * \param cap  state to enable/disable.
 169  *
 170  * Get's the current context, assures that we're outside glBegin()/glEnd() and
 171  * calls client_state().
 172  */
 173 void GLAPIENTRY
 174 _mesa_EnableClientState( GLenum cap )
 175 {
 176    GET_CURRENT_CONTEXT(ctx);
 177    ASSERT_OUTSIDE_BEGIN_END(ctx);
 178    client_state( ctx, cap, GL_TRUE );
 179 }
 180
 181
 182 /**
 183  * Disable GL capability.
 184  * \param cap  state to enable/disable.
 185  *
 186  * Get's the current context, assures that we're outside glBegin()/glEnd() and
 187  * calls client_state().
 188  */
 189 void GLAPIENTRY
 190 _mesa_DisableClientState( GLenum cap )
 191 {
 192    GET_CURRENT_CONTEXT(ctx);
 193    ASSERT_OUTSIDE_BEGIN_END(ctx);
 194    client_state( ctx, cap, GL_FALSE );
 195 }
 196
 197
 198 #undef CHECK_EXTENSION
 199 #define CHECK_EXTENSION(EXTNAME, CAP)                                   \
 200    if (!ctx->Extensions.EXTNAME) {                                      \
 201       goto invalid_enum_error;                                          \
 202    }
 203
 204 #define CHECK_EXTENSION2(EXT1, EXT2, CAP)                               \
 205    if (!ctx->Extensions.EXT1 && !ctx->Extensions.EXT2) {                \
 206       goto invalid_enum_error;                                          \
 207    }
 208
 209 /**
 210  * Return pointer to current texture unit for setting/getting coordinate
 211  * state.
 212  * Note that we'll set GL_INVALID_OPERATION and return NULL if the active
 213  * texture unit is higher than the number of supported coordinate units.
 214  */
 215 static struct gl_texture_unit *
 216 get_texcoord_unit(struct gl_context *ctx)
 217 {
 218    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 219       _mesa_error(ctx, GL_INVALID_OPERATION, "glEnable/Disable(texcoord unit)");
 220       return NULL;
 221    }
 222    else {
 223       return &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 224    }
 225 }
 226
 227
 228 /**
 229  * Helper function to enable or disable a texture target.
 230  * \param bit  one of the TEXTURE_x_BIT values
 231  * \return GL_TRUE if state is changing or GL_FALSE if no change
 232  */
 233 static GLboolean
 234 enable_texture(struct gl_context *ctx, GLboolean state, GLbitfield texBit)
 235 {
 236    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 237    const GLbitfield newenabled = state
 238       ? (texUnit->Enabled | texBit) : (texUnit->Enabled & ~texBit);
 239
 240    if (texUnit->Enabled == newenabled)
 241        return GL_FALSE;
 242
 243    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 244    texUnit->Enabled = newenabled;
 245    return GL_TRUE;
 246 }
 247
 248
 249 /**
 250  * Helper function to enable or disable GL_MULTISAMPLE, skipping the check for
 251  * whether the API supports it (GLES doesn't).
 252  */
 253 void
 254 _mesa_set_multisample(struct gl_context *ctx, GLboolean state)
 255 {
 256    if (ctx->Multisample.Enabled == state)
 257       return;
 258    FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 259    ctx->Multisample.Enabled = state;
 260
 261    if (ctx->Driver.Enable) {
 262       ctx->Driver.Enable(ctx, GL_MULTISAMPLE, state);
 263    }
 264 }
 265
 266 /**
 267  * Helper function to enable or disable state.
 268  *
 269  * \param ctx GL context.
 270  * \param cap  the state to enable/disable
 271  * \param state whether to enable or disable the specified capability.
 272  *
 273  * Updates the current context and flushes the vertices as needed. For
 274  * capabilities associated with extensions it verifies that those extensions
 275  * are effectivly present before updating. Notifies the driver via
 276  * dd_function_table::Enable.
 277  */
 278 void
 279 _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
 280 {
 281    if (MESA_VERBOSE & VERBOSE_API)
 282       _mesa_debug(ctx, "%s %s (newstate is %x)\n",
 283                   state ? "glEnable" : "glDisable",
 284                   _mesa_lookup_enum_by_nr(cap),
 285                   ctx->NewState);
 286
 287    switch (cap) {
 288       case GL_ALPHA_TEST:
 289          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 290             goto invalid_enum_error;
 291          if (ctx->Color.AlphaEnabled == state)
 292             return;
 293          FLUSH_VERTICES(ctx, _NEW_COLOR);
 294          ctx->Color.AlphaEnabled = state;
 295          break;
 296       case GL_AUTO_NORMAL:
 297          if (ctx->API != API_OPENGL)
 298             goto invalid_enum_error;
 299          if (ctx->Eval.AutoNormal == state)
 300             return;
 301          FLUSH_VERTICES(ctx, _NEW_EVAL);
 302          ctx->Eval.AutoNormal = state;
 303          break;
 304       case GL_BLEND:
 305          {
 306             GLbitfield newEnabled =
 307                state * ((1 << ctx->Const.MaxDrawBuffers) - 1);
 308             if (newEnabled != ctx->Color.BlendEnabled) {
 309                FLUSH_VERTICES(ctx, _NEW_COLOR);
 310                ctx->Color.BlendEnabled = newEnabled;
 311             }
 312          }
 313          break;
 314       case GL_CLIP_DISTANCE0:
 315       case GL_CLIP_DISTANCE1:
 316       case GL_CLIP_DISTANCE2:
 317       case GL_CLIP_DISTANCE3:
 318       case GL_CLIP_DISTANCE4:
 319       case GL_CLIP_DISTANCE5:
 320       case GL_CLIP_DISTANCE6:
 321       case GL_CLIP_DISTANCE7:
 322          {
 323             const GLuint p = cap - GL_CLIP_DISTANCE0;
 324
 325             if (p >= ctx->Const.MaxClipPlanes)
 326                goto invalid_enum_error;
 327
 328             if ((ctx->Transform.ClipPlanesEnabled & (1 << p))
 329                 == ((GLuint) state << p))
 330                return;
 331
 332             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 333
 334             if (state) {
 335                ctx->Transform.ClipPlanesEnabled |= (1 << p);
 336                _mesa_update_clip_plane(ctx, p);
 337             }
 338             else {
 339                ctx->Transform.ClipPlanesEnabled &= ~(1 << p);
 340             }
 341          }
 342          break;
 343       case GL_COLOR_MATERIAL:
 344          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 345             goto invalid_enum_error;
 346          if (ctx->Light.ColorMaterialEnabled == state)
 347             return;
 348          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 349          FLUSH_CURRENT(ctx, 0);
 350          ctx->Light.ColorMaterialEnabled = state;
 351          if (state) {
 352             _mesa_update_color_material( ctx,
 353                                   ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 354          }
 355          break;
 356       case GL_CULL_FACE:
 357          if (ctx->Polygon.CullFlag == state)
 358             return;
 359          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 360          ctx->Polygon.CullFlag = state;
 361          break;
 362       case GL_DEPTH_TEST:
 363          if (ctx->Depth.Test == state)
 364             return;
 365          FLUSH_VERTICES(ctx, _NEW_DEPTH);
 366          ctx->Depth.Test = state;
 367          break;
 368       case GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB:
 369          if (!_mesa_is_desktop_gl(ctx))
 370             goto invalid_enum_error;
 371          ctx->Debug.SyncOutput = state;
 372          break;
 373       case GL_DITHER:
 374          if (ctx->Color.DitherFlag == state)
 375             return;
 376          FLUSH_VERTICES(ctx, _NEW_COLOR);
 377          ctx->Color.DitherFlag = state;
 378          break;
 379       case GL_FOG:
 380          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 381             goto invalid_enum_error;
 382          if (ctx->Fog.Enabled == state)
 383             return;
 384          FLUSH_VERTICES(ctx, _NEW_FOG);
 385          ctx->Fog.Enabled = state;
 386          break;
 387       case GL_LIGHT0:
 388       case GL_LIGHT1:
 389       case GL_LIGHT2:
 390       case GL_LIGHT3:
 391       case GL_LIGHT4:
 392       case GL_LIGHT5:
 393       case GL_LIGHT6:
 394       case GL_LIGHT7:
 395          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 396             goto invalid_enum_error;
 397          if (ctx->Light.Light[cap-GL_LIGHT0].Enabled == state)
 398             return;
 399          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 400          ctx->Light.Light[cap-GL_LIGHT0].Enabled = state;
 401          if (state) {
 402             insert_at_tail(&ctx->Light.EnabledList,
 403                            &ctx->Light.Light[cap-GL_LIGHT0]);
 404          }
 405          else {
 406             remove_from_list(&ctx->Light.Light[cap-GL_LIGHT0]);
 407          }
 408          break;
 409       case GL_LIGHTING:
 410          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 411             goto invalid_enum_error;
 412          if (ctx->Light.Enabled == state)
 413             return;
 414          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 415          ctx->Light.Enabled = state;
 416          if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
 417             ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE;
 418          else
 419             ctx->_TriangleCaps &= ~DD_TRI_LIGHT_TWOSIDE;
 420          break;
 421       case GL_LINE_SMOOTH:
 422          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
 423             goto invalid_enum_error;
 424          if (ctx->Line.SmoothFlag == state)
 425             return;
 426          FLUSH_VERTICES(ctx, _NEW_LINE);
 427          ctx->Line.SmoothFlag = state;
 428          ctx->_TriangleCaps ^= DD_LINE_SMOOTH;
 429          break;
 430       case GL_LINE_STIPPLE:
 431          if (ctx->API != API_OPENGL)
 432             goto invalid_enum_error;
 433          if (ctx->Line.StippleFlag == state)
 434             return;
 435          FLUSH_VERTICES(ctx, _NEW_LINE);
 436          ctx->Line.StippleFlag = state;
 437          ctx->_TriangleCaps ^= DD_LINE_STIPPLE;
 438          break;
 439       case GL_INDEX_LOGIC_OP:
 440          if (ctx->API != API_OPENGL)
 441             goto invalid_enum_error;
 442          if (ctx->Color.IndexLogicOpEnabled == state)
 443             return;
 444          FLUSH_VERTICES(ctx, _NEW_COLOR);
 445          ctx->Color.IndexLogicOpEnabled = state;
 446          break;
 447       case GL_COLOR_LOGIC_OP:
 448          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
 449             goto invalid_enum_error;
 450          if (ctx->Color.ColorLogicOpEnabled == state)
 451             return;
 452          FLUSH_VERTICES(ctx, _NEW_COLOR);
 453          ctx->Color.ColorLogicOpEnabled = state;
 454          break;
 455       case GL_MAP1_COLOR_4:
 456          if (ctx->API != API_OPENGL)
 457             goto invalid_enum_error;
 458          if (ctx->Eval.Map1Color4 == state)
 459             return;
 460          FLUSH_VERTICES(ctx, _NEW_EVAL);
 461          ctx->Eval.Map1Color4 = state;
 462          break;
 463       case GL_MAP1_INDEX:
 464          if (ctx->API != API_OPENGL)
 465             goto invalid_enum_error;
 466          if (ctx->Eval.Map1Index == state)
 467             return;
 468          FLUSH_VERTICES(ctx, _NEW_EVAL);
 469          ctx->Eval.Map1Index = state;
 470          break;
 471       case GL_MAP1_NORMAL:
 472          if (ctx->API != API_OPENGL)
 473             goto invalid_enum_error;
 474          if (ctx->Eval.Map1Normal == state)
 475             return;
 476          FLUSH_VERTICES(ctx, _NEW_EVAL);
 477          ctx->Eval.Map1Normal = state;
 478          break;
 479       case GL_MAP1_TEXTURE_COORD_1:
 480          if (ctx->API != API_OPENGL)
 481             goto invalid_enum_error;
 482          if (ctx->Eval.Map1TextureCoord1 == state)
 483             return;
 484          FLUSH_VERTICES(ctx, _NEW_EVAL);
 485          ctx->Eval.Map1TextureCoord1 = state;
 486          break;
 487       case GL_MAP1_TEXTURE_COORD_2:
 488          if (ctx->API != API_OPENGL)
 489             goto invalid_enum_error;
 490          if (ctx->Eval.Map1TextureCoord2 == state)
 491             return;
 492          FLUSH_VERTICES(ctx, _NEW_EVAL);
 493          ctx->Eval.Map1TextureCoord2 = state;
 494          break;
 495       case GL_MAP1_TEXTURE_COORD_3:
 496          if (ctx->API != API_OPENGL)
 497             goto invalid_enum_error;
 498          if (ctx->Eval.Map1TextureCoord3 == state)
 499             return;
 500          FLUSH_VERTICES(ctx, _NEW_EVAL);
 501          ctx->Eval.Map1TextureCoord3 = state;
 502          break;
 503       case GL_MAP1_TEXTURE_COORD_4:
 504          if (ctx->API != API_OPENGL)
 505             goto invalid_enum_error;
 506          if (ctx->Eval.Map1TextureCoord4 == state)
 507             return;
 508          FLUSH_VERTICES(ctx, _NEW_EVAL);
 509          ctx->Eval.Map1TextureCoord4 = state;
 510          break;
 511       case GL_MAP1_VERTEX_3:
 512          if (ctx->API != API_OPENGL)
 513             goto invalid_enum_error;
 514          if (ctx->Eval.Map1Vertex3 == state)
 515             return;
 516          FLUSH_VERTICES(ctx, _NEW_EVAL);
 517          ctx->Eval.Map1Vertex3 = state;
 518          break;
 519       case GL_MAP1_VERTEX_4:
 520          if (ctx->API != API_OPENGL)
 521             goto invalid_enum_error;
 522          if (ctx->Eval.Map1Vertex4 == state)
 523             return;
 524          FLUSH_VERTICES(ctx, _NEW_EVAL);
 525          ctx->Eval.Map1Vertex4 = state;
 526          break;
 527       case GL_MAP2_COLOR_4:
 528          if (ctx->API != API_OPENGL)
 529             goto invalid_enum_error;
 530          if (ctx->Eval.Map2Color4 == state)
 531             return;
 532          FLUSH_VERTICES(ctx, _NEW_EVAL);
 533          ctx->Eval.Map2Color4 = state;
 534          break;
 535       case GL_MAP2_INDEX:
 536          if (ctx->API != API_OPENGL)
 537             goto invalid_enum_error;
 538          if (ctx->Eval.Map2Index == state)
 539             return;
 540          FLUSH_VERTICES(ctx, _NEW_EVAL);
 541          ctx->Eval.Map2Index = state;
 542          break;
 543       case GL_MAP2_NORMAL:
 544          if (ctx->API != API_OPENGL)
 545             goto invalid_enum_error;
 546          if (ctx->Eval.Map2Normal == state)
 547             return;
 548          FLUSH_VERTICES(ctx, _NEW_EVAL);
 549          ctx->Eval.Map2Normal = state;
 550          break;
 551       case GL_MAP2_TEXTURE_COORD_1:
 552          if (ctx->API != API_OPENGL)
 553             goto invalid_enum_error;
 554          if (ctx->Eval.Map2TextureCoord1 == state)
 555             return;
 556          FLUSH_VERTICES(ctx, _NEW_EVAL);
 557          ctx->Eval.Map2TextureCoord1 = state;
 558          break;
 559       case GL_MAP2_TEXTURE_COORD_2:
 560          if (ctx->API != API_OPENGL)
 561             goto invalid_enum_error;
 562          if (ctx->Eval.Map2TextureCoord2 == state)
 563             return;
 564          FLUSH_VERTICES(ctx, _NEW_EVAL);
 565          ctx->Eval.Map2TextureCoord2 = state;
 566          break;
 567       case GL_MAP2_TEXTURE_COORD_3:
 568          if (ctx->API != API_OPENGL)
 569             goto invalid_enum_error;
 570          if (ctx->Eval.Map2TextureCoord3 == state)
 571             return;
 572          FLUSH_VERTICES(ctx, _NEW_EVAL);
 573          ctx->Eval.Map2TextureCoord3 = state;
 574          break;
 575       case GL_MAP2_TEXTURE_COORD_4:
 576          if (ctx->API != API_OPENGL)
 577             goto invalid_enum_error;
 578          if (ctx->Eval.Map2TextureCoord4 == state)
 579             return;
 580          FLUSH_VERTICES(ctx, _NEW_EVAL);
 581          ctx->Eval.Map2TextureCoord4 = state;
 582          break;
 583       case GL_MAP2_VERTEX_3:
 584          if (ctx->API != API_OPENGL)
 585             goto invalid_enum_error;
 586          if (ctx->Eval.Map2Vertex3 == state)
 587             return;
 588          FLUSH_VERTICES(ctx, _NEW_EVAL);
 589          ctx->Eval.Map2Vertex3 = state;
 590          break;
 591       case GL_MAP2_VERTEX_4:
 592          if (ctx->API != API_OPENGL)
 593             goto invalid_enum_error;
 594          if (ctx->Eval.Map2Vertex4 == state)
 595             return;
 596          FLUSH_VERTICES(ctx, _NEW_EVAL);
 597          ctx->Eval.Map2Vertex4 = state;
 598          break;
 599       case GL_NORMALIZE:
 600          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 601             goto invalid_enum_error;
 602          if (ctx->Transform.Normalize == state)
 603             return;
 604          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 605          ctx->Transform.Normalize = state;
 606          break;
 607       case GL_POINT_SMOOTH:
 608          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 609             goto invalid_enum_error;
 610          if (ctx->Point.SmoothFlag == state)
 611             return;
 612          FLUSH_VERTICES(ctx, _NEW_POINT);
 613          ctx->Point.SmoothFlag = state;
 614          ctx->_TriangleCaps ^= DD_POINT_SMOOTH;
 615          break;
 616       case GL_POLYGON_SMOOTH:
 617          if (!_mesa_is_desktop_gl(ctx))
 618             goto invalid_enum_error;
 619          if (ctx->Polygon.SmoothFlag == state)
 620             return;
 621          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 622          ctx->Polygon.SmoothFlag = state;
 623          ctx->_TriangleCaps ^= DD_TRI_SMOOTH;
 624          break;
 625       case GL_POLYGON_STIPPLE:
 626          if (ctx->API != API_OPENGL)
 627             goto invalid_enum_error;
 628          if (ctx->Polygon.StippleFlag == state)
 629             return;
 630          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 631          ctx->Polygon.StippleFlag = state;
 632          ctx->_TriangleCaps ^= DD_TRI_STIPPLE;
 633          break;
 634       case GL_POLYGON_OFFSET_POINT:
 635          if (!_mesa_is_desktop_gl(ctx))
 636             goto invalid_enum_error;
 637          if (ctx->Polygon.OffsetPoint == state)
 638             return;
 639          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 640          ctx->Polygon.OffsetPoint = state;
 641          break;
 642       case GL_POLYGON_OFFSET_LINE:
 643          if (!_mesa_is_desktop_gl(ctx))
 644             goto invalid_enum_error;
 645          if (ctx->Polygon.OffsetLine == state)
 646             return;
 647          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 648          ctx->Polygon.OffsetLine = state;
 649          break;
 650       case GL_POLYGON_OFFSET_FILL:
 651          if (ctx->Polygon.OffsetFill == state)
 652             return;
 653          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 654          ctx->Polygon.OffsetFill = state;
 655          break;
 656       case GL_RESCALE_NORMAL_EXT:
 657          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 658             goto invalid_enum_error;
 659          if (ctx->Transform.RescaleNormals == state)
 660             return;
 661          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 662          ctx->Transform.RescaleNormals = state;
 663          break;
 664       case GL_SCISSOR_TEST:
 665          if (ctx->Scissor.Enabled == state)
 666             return;
 667          FLUSH_VERTICES(ctx, _NEW_SCISSOR);
 668          ctx->Scissor.Enabled = state;
 669          break;
 670       case GL_STENCIL_TEST:
 671          if (ctx->Stencil.Enabled == state)
 672             return;
 673          FLUSH_VERTICES(ctx, _NEW_STENCIL);
 674          ctx->Stencil.Enabled = state;
 675          break;
 676       case GL_TEXTURE_1D:
 677          if (ctx->API != API_OPENGL)
 678             goto invalid_enum_error;
 679          if (!enable_texture(ctx, state, TEXTURE_1D_BIT)) {
 680             return;
 681          }
 682          break;
 683       case GL_TEXTURE_2D:
 684          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 685             goto invalid_enum_error;
 686          if (!enable_texture(ctx, state, TEXTURE_2D_BIT)) {
 687             return;
 688          }
 689          break;
 690       case GL_TEXTURE_3D:
 691          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 692             goto invalid_enum_error;
 693          if (!enable_texture(ctx, state, TEXTURE_3D_BIT)) {
 694             return;
 695          }
 696          break;
 697       case GL_TEXTURE_GEN_S:
 698       case GL_TEXTURE_GEN_T:
 699       case GL_TEXTURE_GEN_R:
 700       case GL_TEXTURE_GEN_Q:
 701          {
 702             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 703
 704             if (ctx->API != API_OPENGL)
 705                goto invalid_enum_error;
 706
 707             if (texUnit) {
 708                GLbitfield coordBit = S_BIT << (cap - GL_TEXTURE_GEN_S);
 709                GLbitfield newenabled = texUnit->TexGenEnabled & ~coordBit;
 710                if (state)
 711                   newenabled |= coordBit;
 712                if (texUnit->TexGenEnabled == newenabled)
 713                   return;
 714                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 715                texUnit->TexGenEnabled = newenabled;
 716             }
 717          }
 718          break;
 719
 720 #if FEATURE_ES1
 721       case GL_TEXTURE_GEN_STR_OES:
 722          /* disable S, T, and R at the same time */
 723          {
 724             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 725
 726             if (ctx->API != API_OPENGLES)
 727                goto invalid_enum_error;
 728
 729             if (texUnit) {
 730                GLuint newenabled =
 731                   texUnit->TexGenEnabled & ~STR_BITS;
 732                if (state)
 733                   newenabled |= STR_BITS;
 734                if (texUnit->TexGenEnabled == newenabled)
 735                   return;
 736                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 737                texUnit->TexGenEnabled = newenabled;
 738             }
 739          }
 740          break;
 741 #endif
 742
 743       /* client-side state */
 744       case GL_VERTEX_ARRAY:
 745       case GL_NORMAL_ARRAY:
 746       case GL_COLOR_ARRAY:
 747       case GL_INDEX_ARRAY:
 748       case GL_TEXTURE_COORD_ARRAY:
 749       case GL_EDGE_FLAG_ARRAY:
 750       case GL_FOG_COORDINATE_ARRAY_EXT:
 751       case GL_SECONDARY_COLOR_ARRAY_EXT:
 752       case GL_POINT_SIZE_ARRAY_OES:
 753          client_state( ctx, cap, state );
 754          return;
 755
 756       /* GL_ARB_texture_cube_map */
 757       case GL_TEXTURE_CUBE_MAP_ARB:
 758          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 759             goto invalid_enum_error;
 760          CHECK_EXTENSION(ARB_texture_cube_map, cap);
 761          if (!enable_texture(ctx, state, TEXTURE_CUBE_BIT)) {
 762             return;
 763          }
 764          break;
 765
 766       /* GL_EXT_secondary_color */
 767       case GL_COLOR_SUM_EXT:
 768          if (ctx->API != API_OPENGL)
 769             goto invalid_enum_error;
 770          CHECK_EXTENSION2(EXT_secondary_color, ARB_vertex_program, cap);
 771          if (ctx->Fog.ColorSumEnabled == state)
 772             return;
 773          FLUSH_VERTICES(ctx, _NEW_FOG);
 774          ctx->Fog.ColorSumEnabled = state;
 775          break;
 776
 777       /* GL_ARB_multisample */
 778       case GL_MULTISAMPLE_ARB:
 779          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
 780             goto invalid_enum_error;
 781          _mesa_set_multisample(ctx, state);
 782          return;
 783       case GL_SAMPLE_ALPHA_TO_COVERAGE_ARB:
 784          if (ctx->Multisample.SampleAlphaToCoverage == state)
 785             return;
 786          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 787          ctx->Multisample.SampleAlphaToCoverage = state;
 788          break;
 789       case GL_SAMPLE_ALPHA_TO_ONE_ARB:
 790          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
 791             goto invalid_enum_error;
 792          if (ctx->Multisample.SampleAlphaToOne == state)
 793             return;
 794          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 795          ctx->Multisample.SampleAlphaToOne = state;
 796          break;
 797       case GL_SAMPLE_COVERAGE_ARB:
 798          if (ctx->Multisample.SampleCoverage == state)
 799             return;
 800          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 801          ctx->Multisample.SampleCoverage = state;
 802          break;
 803       case GL_SAMPLE_COVERAGE_INVERT_ARB:
 804          if (!_mesa_is_desktop_gl(ctx))
 805             goto invalid_enum_error;
 806          if (ctx->Multisample.SampleCoverageInvert == state)
 807             return;
 808          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 809          ctx->Multisample.SampleCoverageInvert = state;
 810          break;
 811
 812       /* GL_IBM_rasterpos_clip */
 813       case GL_RASTER_POSITION_UNCLIPPED_IBM:
 814          if (ctx->API != API_OPENGL)
 815             goto invalid_enum_error;
 816          CHECK_EXTENSION(IBM_rasterpos_clip, cap);
 817          if (ctx->Transform.RasterPositionUnclipped == state)
 818             return;
 819          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 820          ctx->Transform.RasterPositionUnclipped = state;
 821          break;
 822
 823       /* GL_NV_point_sprite */
 824       case GL_POINT_SPRITE_NV:
 825          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
 826             goto invalid_enum_error;
 827          CHECK_EXTENSION2(NV_point_sprite, ARB_point_sprite, cap);
 828          if (ctx->Point.PointSprite == state)
 829             return;
 830          FLUSH_VERTICES(ctx, _NEW_POINT);
 831          ctx->Point.PointSprite = state;
 832          break;
 833
 834       case GL_VERTEX_PROGRAM_ARB:
 835          if (ctx->API != API_OPENGL)
 836             goto invalid_enum_error;
 837          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 838          if (ctx->VertexProgram.Enabled == state)
 839             return;
 840          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 841          ctx->VertexProgram.Enabled = state;
 842          break;
 843       case GL_VERTEX_PROGRAM_POINT_SIZE_ARB:
 844          /* This was added with ARB_vertex_program, but it is also used with
 845           * GLSL vertex shaders on desktop.
 846           */
 847          if (!_mesa_is_desktop_gl(ctx))
 848             goto invalid_enum_error;
 849          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 850          if (ctx->VertexProgram.PointSizeEnabled == state)
 851             return;
 852          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 853          ctx->VertexProgram.PointSizeEnabled = state;
 854          break;
 855       case GL_VERTEX_PROGRAM_TWO_SIDE_ARB:
 856          if (ctx->API != API_OPENGL)
 857             goto invalid_enum_error;
 858          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 859          if (ctx->VertexProgram.TwoSideEnabled == state)
 860             return;
 861          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 862          ctx->VertexProgram.TwoSideEnabled = state;
 863          break;
 864
 865       case GL_MAP1_VERTEX_ATTRIB0_4_NV:
 866       case GL_MAP1_VERTEX_ATTRIB1_4_NV:
 867       case GL_MAP1_VERTEX_ATTRIB2_4_NV:
 868       case GL_MAP1_VERTEX_ATTRIB3_4_NV:
 869       case GL_MAP1_VERTEX_ATTRIB4_4_NV:
 870       case GL_MAP1_VERTEX_ATTRIB5_4_NV:
 871       case GL_MAP1_VERTEX_ATTRIB6_4_NV:
 872       case GL_MAP1_VERTEX_ATTRIB7_4_NV:
 873       case GL_MAP1_VERTEX_ATTRIB8_4_NV:
 874       case GL_MAP1_VERTEX_ATTRIB9_4_NV:
 875       case GL_MAP1_VERTEX_ATTRIB10_4_NV:
 876       case GL_MAP1_VERTEX_ATTRIB11_4_NV:
 877       case GL_MAP1_VERTEX_ATTRIB12_4_NV:
 878       case GL_MAP1_VERTEX_ATTRIB13_4_NV:
 879       case GL_MAP1_VERTEX_ATTRIB14_4_NV:
 880       case GL_MAP1_VERTEX_ATTRIB15_4_NV:
 881          if (ctx->API != API_OPENGL)
 882             goto invalid_enum_error;
 883          CHECK_EXTENSION(NV_vertex_program, cap);
 884          {
 885             const GLuint map = (GLuint) (cap - GL_MAP1_VERTEX_ATTRIB0_4_NV);
 886             FLUSH_VERTICES(ctx, _NEW_EVAL);
 887             ctx->Eval.Map1Attrib[map] = state;
 888          }
 889          break;
 890       case GL_MAP2_VERTEX_ATTRIB0_4_NV:
 891       case GL_MAP2_VERTEX_ATTRIB1_4_NV:
 892       case GL_MAP2_VERTEX_ATTRIB2_4_NV:
 893       case GL_MAP2_VERTEX_ATTRIB3_4_NV:
 894       case GL_MAP2_VERTEX_ATTRIB4_4_NV:
 895       case GL_MAP2_VERTEX_ATTRIB5_4_NV:
 896       case GL_MAP2_VERTEX_ATTRIB6_4_NV:
 897       case GL_MAP2_VERTEX_ATTRIB7_4_NV:
 898       case GL_MAP2_VERTEX_ATTRIB8_4_NV:
 899       case GL_MAP2_VERTEX_ATTRIB9_4_NV:
 900       case GL_MAP2_VERTEX_ATTRIB10_4_NV:
 901       case GL_MAP2_VERTEX_ATTRIB11_4_NV:
 902       case GL_MAP2_VERTEX_ATTRIB12_4_NV:
 903       case GL_MAP2_VERTEX_ATTRIB13_4_NV:
 904       case GL_MAP2_VERTEX_ATTRIB14_4_NV:
 905       case GL_MAP2_VERTEX_ATTRIB15_4_NV:
 906          if (ctx->API != API_OPENGL)
 907             goto invalid_enum_error;
 908          CHECK_EXTENSION(NV_vertex_program, cap);
 909          {
 910             const GLuint map = (GLuint) (cap - GL_MAP2_VERTEX_ATTRIB0_4_NV);
 911             FLUSH_VERTICES(ctx, _NEW_EVAL);
 912             ctx->Eval.Map2Attrib[map] = state;
 913          }
 914          break;
 915
 916       case GL_FRAGMENT_PROGRAM_NV:
 917          if (ctx->API != API_OPENGL)
 918             goto invalid_enum_error;
 919          CHECK_EXTENSION(NV_fragment_program, cap);
 920          if (ctx->FragmentProgram.Enabled == state)
 921             return;
 922          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 923          ctx->FragmentProgram.Enabled = state;
 924          break;
 925
 926       /* GL_NV_texture_rectangle */
 927       case GL_TEXTURE_RECTANGLE_NV:
 928          if (ctx->API != API_OPENGL)
 929             goto invalid_enum_error;
 930          CHECK_EXTENSION(NV_texture_rectangle, cap);
 931          if (!enable_texture(ctx, state, TEXTURE_RECT_BIT)) {
 932             return;
 933          }
 934          break;
 935
 936       /* GL_EXT_stencil_two_side */
 937       case GL_STENCIL_TEST_TWO_SIDE_EXT:
 938          if (ctx->API != API_OPENGL)
 939             goto invalid_enum_error;
 940          CHECK_EXTENSION(EXT_stencil_two_side, cap);
 941          if (ctx->Stencil.TestTwoSide == state)
 942             return;
 943          FLUSH_VERTICES(ctx, _NEW_STENCIL);
 944          ctx->Stencil.TestTwoSide = state;
 945          if (state) {
 946             ctx->Stencil._BackFace = 2;
 947          } else {
 948             ctx->Stencil._BackFace = 1;
 949          }
 950          break;
 951
 952       case GL_FRAGMENT_PROGRAM_ARB:
 953          if (ctx->API != API_OPENGL)
 954             goto invalid_enum_error;
 955          CHECK_EXTENSION(ARB_fragment_program, cap);
 956          if (ctx->FragmentProgram.Enabled == state)
 957             return;
 958          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 959          ctx->FragmentProgram.Enabled = state;
 960          break;
 961
 962       /* GL_EXT_depth_bounds_test */
 963       case GL_DEPTH_BOUNDS_TEST_EXT:
 964          if (!_mesa_is_desktop_gl(ctx))
 965             goto invalid_enum_error;
 966          CHECK_EXTENSION(EXT_depth_bounds_test, cap);
 967          if (ctx->Depth.BoundsTest == state)
 968             return;
 969          FLUSH_VERTICES(ctx, _NEW_DEPTH);
 970          ctx->Depth.BoundsTest = state;
 971          break;
 972
 973       case GL_DEPTH_CLAMP:
 974          if (!_mesa_is_desktop_gl(ctx))
 975             goto invalid_enum_error;
 976          CHECK_EXTENSION(ARB_depth_clamp, cap);
 977          if (ctx->Transform.DepthClamp == state)
 978             return;
 979          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 980          ctx->Transform.DepthClamp = state;
 981          break;
 982
 983       case GL_FRAGMENT_SHADER_ATI:
 984          if (ctx->API != API_OPENGL)
 985             goto invalid_enum_error;
 986         CHECK_EXTENSION(ATI_fragment_shader, cap);
 987         if (ctx->ATIFragmentShader.Enabled == state)
 988           return;
 989         FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 990         ctx->ATIFragmentShader.Enabled = state;
 991         break;
 992
 993       /* GL_MESA_texture_array */
 994       case GL_TEXTURE_1D_ARRAY_EXT:
 995          if (ctx->API != API_OPENGL)
 996             goto invalid_enum_error;
 997          CHECK_EXTENSION(MESA_texture_array, cap);
 998          if (!enable_texture(ctx, state, TEXTURE_1D_ARRAY_BIT)) {
 999             return;
1000          }
1001          break;
1002
1003       case GL_TEXTURE_2D_ARRAY_EXT:
1004          if (ctx->API != API_OPENGL)
1005             goto invalid_enum_error;
1006          CHECK_EXTENSION(MESA_texture_array, cap);
1007          if (!enable_texture(ctx, state, TEXTURE_2D_ARRAY_BIT)) {
1008             return;
1009          }
1010          break;
1011
1012       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1013          if (!_mesa_is_desktop_gl(ctx))
1014             goto invalid_enum_error;
1015          CHECK_EXTENSION(ARB_seamless_cube_map, cap);
1016          if (ctx->Texture.CubeMapSeamless != state) {
1017             FLUSH_VERTICES(ctx, _NEW_TEXTURE);
1018             ctx->Texture.CubeMapSeamless = state;
1019          }
1020          break;
1021
1022       case GL_RASTERIZER_DISCARD:
1023          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1024             goto invalid_enum_error;
1025          CHECK_EXTENSION(EXT_transform_feedback, cap);
1026          if (ctx->RasterDiscard != state) {
1027             FLUSH_VERTICES(ctx, _NEW_RASTERIZER_DISCARD);
1028             ctx->RasterDiscard = state;
1029          }
1030          break;
1031
1032       /* GL 3.1 primitive restart.  Note: this enum is different from
1033        * GL_PRIMITIVE_RESTART_NV (which is client state).
1034        */
1035       case GL_PRIMITIVE_RESTART:
1036          if (!_mesa_is_desktop_gl(ctx) || ctx->Version < 31) {
1037             goto invalid_enum_error;
1038          }
1039          if (ctx->Array.PrimitiveRestart != state) {
1040             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
1041             ctx->Array.PrimitiveRestart = state;
1042          }
1043          break;
1044
1045       /* GL3.0 - GL_framebuffer_sRGB */
1046       case GL_FRAMEBUFFER_SRGB_EXT:
1047          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1048             goto invalid_enum_error;
1049          CHECK_EXTENSION(EXT_framebuffer_sRGB, cap);
1050          FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1051          ctx->Color.sRGBEnabled = state;
1052          break;
1053
1054       /* GL_OES_EGL_image_external */
1055       case GL_TEXTURE_EXTERNAL_OES:
1056          if (!_mesa_is_gles(ctx))
1057             goto invalid_enum_error;
1058          CHECK_EXTENSION(OES_EGL_image_external, cap);
1059          if (!enable_texture(ctx, state, TEXTURE_EXTERNAL_BIT)) {
1060             return;
1061          }
1062          break;
1063
1064       default:
1065          goto invalid_enum_error;
1066    }
1067
1068    if (ctx->Driver.Enable) {
1069       ctx->Driver.Enable( ctx, cap, state );
1070    }
1071
1072    return;
1073
1074 invalid_enum_error:
1075    _mesa_error(ctx, GL_INVALID_ENUM, "gl%s(%s)",
1076                state ? "Enable" : "Disable", _mesa_lookup_enum_by_nr(cap));
1077 }
1078
1079
1080 /**
1081  * Enable GL capability.  Called by glEnable()
1082  * \param cap  state to enable.
1083  */
1084 void GLAPIENTRY
1085 _mesa_Enable( GLenum cap )
1086 {
1087    GET_CURRENT_CONTEXT(ctx);
1088    ASSERT_OUTSIDE_BEGIN_END(ctx);
1089
1090    _mesa_set_enable( ctx, cap, GL_TRUE );
1091 }
1092
1093
1094 /**
1095  * Disable GL capability.  Called by glDisable()
1096  * \param cap  state to disable.
1097  */
1098 void GLAPIENTRY
1099 _mesa_Disable( GLenum cap )
1100 {
1101    GET_CURRENT_CONTEXT(ctx);
1102    ASSERT_OUTSIDE_BEGIN_END(ctx);
1103
1104    _mesa_set_enable( ctx, cap, GL_FALSE );
1105 }
1106
1107
1108
1109 /**
1110  * Enable/disable an indexed state var.
1111  */
1112 void
1113 _mesa_set_enablei(struct gl_context *ctx, GLenum cap,
1114                   GLuint index, GLboolean state)
1115 {
1116    ASSERT(state == 0 || state == 1);
1117    switch (cap) {
1118    case GL_BLEND:
1119       if (!ctx->Extensions.EXT_draw_buffers2) {
1120          goto invalid_enum_error;
1121       }
1122       if (index >= ctx->Const.MaxDrawBuffers) {
1123          _mesa_error(ctx, GL_INVALID_VALUE, "%s(index=%u)",
1124                      state ? "glEnableIndexed" : "glDisableIndexed", index);
1125          return;
1126       }
1127       if (((ctx->Color.BlendEnabled >> index) & 1) != state) {
1128          FLUSH_VERTICES(ctx, _NEW_COLOR);
1129          if (state)
1130             ctx->Color.BlendEnabled |= (1 << index);
1131          else
1132             ctx->Color.BlendEnabled &= ~(1 << index);
1133       }
1134       break;
1135    default:
1136       goto invalid_enum_error;
1137    }
1138    return;
1139
1140 invalid_enum_error:
1141     _mesa_error(ctx, GL_INVALID_ENUM, "%s(cap=%s)",
1142                 state ? "glEnablei" : "glDisablei",
1143                 _mesa_lookup_enum_by_nr(cap));
1144 }
1145
1146
1147 void GLAPIENTRY
1148 _mesa_DisableIndexed( GLenum cap, GLuint index )
1149 {
1150    GET_CURRENT_CONTEXT(ctx);
1151    ASSERT_OUTSIDE_BEGIN_END(ctx);
1152    _mesa_set_enablei(ctx, cap, index, GL_FALSE);
1153 }
1154
1155
1156 void GLAPIENTRY
1157 _mesa_EnableIndexed( GLenum cap, GLuint index )
1158 {
1159    GET_CURRENT_CONTEXT(ctx);
1160    ASSERT_OUTSIDE_BEGIN_END(ctx);
1161    _mesa_set_enablei(ctx, cap, index, GL_TRUE);
1162 }
1163
1164
1165 GLboolean GLAPIENTRY
1166 _mesa_IsEnabledIndexed( GLenum cap, GLuint index )
1167 {
1168    GET_CURRENT_CONTEXT(ctx);
1169    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1170    switch (cap) {
1171    case GL_BLEND:
1172       if (index >= ctx->Const.MaxDrawBuffers) {
1173          _mesa_error(ctx, GL_INVALID_VALUE, "glIsEnabledIndexed(index=%u)",
1174                      index);
1175          return GL_FALSE;
1176       }
1177       return (ctx->Color.BlendEnabled >> index) & 1;
1178    default:
1179       _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabledIndexed(cap=%s)",
1180                   _mesa_lookup_enum_by_nr(cap));
1181       return GL_FALSE;
1182    }
1183 }
1184
1185
1186
1187
1188 #undef CHECK_EXTENSION
1189 #define CHECK_EXTENSION(EXTNAME)                        \
1190    if (!ctx->Extensions.EXTNAME) {                      \
1191       goto invalid_enum_error;                          \
1192    }
1193
1194 #undef CHECK_EXTENSION2
1195 #define CHECK_EXTENSION2(EXT1, EXT2)                            \
1196    if (!ctx->Extensions.EXT1 && !ctx->Extensions.EXT2) {        \
1197       goto invalid_enum_error;                                  \
1198    }
1199
1200
1201 /**
1202  * Helper function to determine whether a texture target is enabled.
1203  */
1204 static GLboolean
1205 is_texture_enabled(struct gl_context *ctx, GLbitfield bit)
1206 {
1207    const struct gl_texture_unit *const texUnit =
1208        &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
1209    return (texUnit->Enabled & bit) ? GL_TRUE : GL_FALSE;
1210 }
1211
1212
1213 /**
1214  * Return simple enable/disable state.
1215  *
1216  * \param cap  state variable to query.
1217  *
1218  * Returns the state of the specified capability from the current GL context.
1219  * For the capabilities associated with extensions verifies that those
1220  * extensions are effectively present before reporting.
1221  */
1222 GLboolean GLAPIENTRY
1223 _mesa_IsEnabled( GLenum cap )
1224 {
1225    GET_CURRENT_CONTEXT(ctx);
1226    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1227
1228    switch (cap) {
1229       case GL_ALPHA_TEST:
1230          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1231             goto invalid_enum_error;
1232          return ctx->Color.AlphaEnabled;
1233       case GL_AUTO_NORMAL:
1234          if (ctx->API != API_OPENGL)
1235             goto invalid_enum_error;
1236          return ctx->Eval.AutoNormal;
1237       case GL_BLEND:
1238          return ctx->Color.BlendEnabled & 1;  /* return state for buffer[0] */
1239       case GL_CLIP_DISTANCE0:
1240       case GL_CLIP_DISTANCE1:
1241       case GL_CLIP_DISTANCE2:
1242       case GL_CLIP_DISTANCE3:
1243       case GL_CLIP_DISTANCE4:
1244       case GL_CLIP_DISTANCE5:
1245       case GL_CLIP_DISTANCE6:
1246       case GL_CLIP_DISTANCE7: {
1247          const GLuint p = cap - GL_CLIP_DISTANCE0;
1248
1249          if (p >= ctx->Const.MaxClipPlanes)
1250             goto invalid_enum_error;
1251
1252          return (ctx->Transform.ClipPlanesEnabled >> p) & 1;
1253       }
1254       case GL_COLOR_MATERIAL:
1255          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1256             goto invalid_enum_error;
1257          return ctx->Light.ColorMaterialEnabled;
1258       case GL_CULL_FACE:
1259          return ctx->Polygon.CullFlag;
1260       case GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB:
1261          if (!_mesa_is_desktop_gl(ctx))
1262             goto invalid_enum_error;
1263          return ctx->Debug.SyncOutput;
1264       case GL_DEPTH_TEST:
1265          return ctx->Depth.Test;
1266       case GL_DITHER:
1267          return ctx->Color.DitherFlag;
1268       case GL_FOG:
1269          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1270             goto invalid_enum_error;
1271          return ctx->Fog.Enabled;
1272       case GL_LIGHTING:
1273          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1274             goto invalid_enum_error;
1275          return ctx->Light.Enabled;
1276       case GL_LIGHT0:
1277       case GL_LIGHT1:
1278       case GL_LIGHT2:
1279       case GL_LIGHT3:
1280       case GL_LIGHT4:
1281       case GL_LIGHT5:
1282       case GL_LIGHT6:
1283       case GL_LIGHT7:
1284          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1285             goto invalid_enum_error;
1286          return ctx->Light.Light[cap-GL_LIGHT0].Enabled;
1287       case GL_LINE_SMOOTH:
1288          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
1289             goto invalid_enum_error;
1290          return ctx->Line.SmoothFlag;
1291       case GL_LINE_STIPPLE:
1292          if (ctx->API != API_OPENGL)
1293             goto invalid_enum_error;
1294          return ctx->Line.StippleFlag;
1295       case GL_INDEX_LOGIC_OP:
1296          if (ctx->API != API_OPENGL)
1297             goto invalid_enum_error;
1298          return ctx->Color.IndexLogicOpEnabled;
1299       case GL_COLOR_LOGIC_OP:
1300          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
1301             goto invalid_enum_error;
1302          return ctx->Color.ColorLogicOpEnabled;
1303       case GL_MAP1_COLOR_4:
1304          if (ctx->API != API_OPENGL)
1305             goto invalid_enum_error;
1306          return ctx->Eval.Map1Color4;
1307       case GL_MAP1_INDEX:
1308          if (ctx->API != API_OPENGL)
1309             goto invalid_enum_error;
1310          return ctx->Eval.Map1Index;
1311       case GL_MAP1_NORMAL:
1312          if (ctx->API != API_OPENGL)
1313             goto invalid_enum_error;
1314          return ctx->Eval.Map1Normal;
1315       case GL_MAP1_TEXTURE_COORD_1:
1316          if (ctx->API != API_OPENGL)
1317             goto invalid_enum_error;
1318          return ctx->Eval.Map1TextureCoord1;
1319       case GL_MAP1_TEXTURE_COORD_2:
1320          if (ctx->API != API_OPENGL)
1321             goto invalid_enum_error;
1322          return ctx->Eval.Map1TextureCoord2;
1323       case GL_MAP1_TEXTURE_COORD_3:
1324          if (ctx->API != API_OPENGL)
1325             goto invalid_enum_error;
1326          return ctx->Eval.Map1TextureCoord3;
1327       case GL_MAP1_TEXTURE_COORD_4:
1328          if (ctx->API != API_OPENGL)
1329             goto invalid_enum_error;
1330          return ctx->Eval.Map1TextureCoord4;
1331       case GL_MAP1_VERTEX_3:
1332          if (ctx->API != API_OPENGL)
1333             goto invalid_enum_error;
1334          return ctx->Eval.Map1Vertex3;
1335       case GL_MAP1_VERTEX_4:
1336          if (ctx->API != API_OPENGL)
1337             goto invalid_enum_error;
1338          return ctx->Eval.Map1Vertex4;
1339       case GL_MAP2_COLOR_4:
1340          if (ctx->API != API_OPENGL)
1341             goto invalid_enum_error;
1342          return ctx->Eval.Map2Color4;
1343       case GL_MAP2_INDEX:
1344          if (ctx->API != API_OPENGL)
1345             goto invalid_enum_error;
1346          return ctx->Eval.Map2Index;
1347       case GL_MAP2_NORMAL:
1348          if (ctx->API != API_OPENGL)
1349             goto invalid_enum_error;
1350          return ctx->Eval.Map2Normal;
1351       case GL_MAP2_TEXTURE_COORD_1:
1352          if (ctx->API != API_OPENGL)
1353             goto invalid_enum_error;
1354          return ctx->Eval.Map2TextureCoord1;
1355       case GL_MAP2_TEXTURE_COORD_2:
1356          if (ctx->API != API_OPENGL)
1357             goto invalid_enum_error;
1358          return ctx->Eval.Map2TextureCoord2;
1359       case GL_MAP2_TEXTURE_COORD_3:
1360          if (ctx->API != API_OPENGL)
1361             goto invalid_enum_error;
1362          return ctx->Eval.Map2TextureCoord3;
1363       case GL_MAP2_TEXTURE_COORD_4:
1364          if (ctx->API != API_OPENGL)
1365             goto invalid_enum_error;
1366          return ctx->Eval.Map2TextureCoord4;
1367       case GL_MAP2_VERTEX_3:
1368          if (ctx->API != API_OPENGL)
1369             goto invalid_enum_error;
1370          return ctx->Eval.Map2Vertex3;
1371       case GL_MAP2_VERTEX_4:
1372          if (ctx->API != API_OPENGL)
1373             goto invalid_enum_error;
1374          return ctx->Eval.Map2Vertex4;
1375       case GL_NORMALIZE:
1376          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1377             goto invalid_enum_error;
1378          return ctx->Transform.Normalize;
1379       case GL_POINT_SMOOTH:
1380          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1381             goto invalid_enum_error;
1382          return ctx->Point.SmoothFlag;
1383       case GL_POLYGON_SMOOTH:
1384          if (!_mesa_is_desktop_gl(ctx))
1385             goto invalid_enum_error;
1386          return ctx->Polygon.SmoothFlag;
1387       case GL_POLYGON_STIPPLE:
1388          if (ctx->API != API_OPENGL)
1389             goto invalid_enum_error;
1390          return ctx->Polygon.StippleFlag;
1391       case GL_POLYGON_OFFSET_POINT:
1392          if (!_mesa_is_desktop_gl(ctx))
1393             goto invalid_enum_error;
1394          return ctx->Polygon.OffsetPoint;
1395       case GL_POLYGON_OFFSET_LINE:
1396          if (!_mesa_is_desktop_gl(ctx))
1397             goto invalid_enum_error;
1398          return ctx->Polygon.OffsetLine;
1399       case GL_POLYGON_OFFSET_FILL:
1400          return ctx->Polygon.OffsetFill;
1401       case GL_RESCALE_NORMAL_EXT:
1402          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1403             goto invalid_enum_error;
1404          return ctx->Transform.RescaleNormals;
1405       case GL_SCISSOR_TEST:
1406          return ctx->Scissor.Enabled;
1407       case GL_STENCIL_TEST:
1408          return ctx->Stencil.Enabled;
1409       case GL_TEXTURE_1D:
1410          if (ctx->API != API_OPENGL)
1411             goto invalid_enum_error;
1412          return is_texture_enabled(ctx, TEXTURE_1D_BIT);
1413       case GL_TEXTURE_2D:
1414          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1415             goto invalid_enum_error;
1416          return is_texture_enabled(ctx, TEXTURE_2D_BIT);
1417       case GL_TEXTURE_3D:
1418          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1419             goto invalid_enum_error;
1420          return is_texture_enabled(ctx, TEXTURE_3D_BIT);
1421       case GL_TEXTURE_GEN_S:
1422       case GL_TEXTURE_GEN_T:
1423       case GL_TEXTURE_GEN_R:
1424       case GL_TEXTURE_GEN_Q:
1425          {
1426             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1427
1428             if (ctx->API != API_OPENGL)
1429                goto invalid_enum_error;
1430
1431             if (texUnit) {
1432                GLbitfield coordBit = S_BIT << (cap - GL_TEXTURE_GEN_S);
1433                return (texUnit->TexGenEnabled & coordBit) ? GL_TRUE : GL_FALSE;
1434             }
1435          }
1436          return GL_FALSE;
1437 #if FEATURE_ES1
1438       case GL_TEXTURE_GEN_STR_OES:
1439          {
1440             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1441
1442             if (ctx->API != API_OPENGLES)
1443                goto invalid_enum_error;
1444
1445             if (texUnit) {
1446                return (texUnit->TexGenEnabled & STR_BITS) == STR_BITS
1447                   ? GL_TRUE : GL_FALSE;
1448             }
1449          }
1450 #endif
1451
1452       /* client-side state */
1453       case GL_VERTEX_ARRAY:
1454          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1455             goto invalid_enum_error;
1456          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled != 0);
1457       case GL_NORMAL_ARRAY:
1458          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1459             goto invalid_enum_error;
1460          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled != 0);
1461       case GL_COLOR_ARRAY:
1462          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1463             goto invalid_enum_error;
1464          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled != 0);
1465       case GL_INDEX_ARRAY:
1466          if (ctx->API != API_OPENGL)
1467             goto invalid_enum_error;
1468          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled != 0);
1469       case GL_TEXTURE_COORD_ARRAY:
1470          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1471             goto invalid_enum_error;
1472          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX(ctx->Array.ActiveTexture)]
1473                  .Enabled != 0);
1474       case GL_EDGE_FLAG_ARRAY:
1475          if (ctx->API != API_OPENGL)
1476             goto invalid_enum_error;
1477          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled != 0);
1478       case GL_FOG_COORDINATE_ARRAY_EXT:
1479          if (ctx->API != API_OPENGL)
1480             goto invalid_enum_error;
1481          CHECK_EXTENSION(EXT_fog_coord);
1482          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled != 0);
1483       case GL_SECONDARY_COLOR_ARRAY_EXT:
1484          if (ctx->API != API_OPENGL)
1485             goto invalid_enum_error;
1486          CHECK_EXTENSION(EXT_secondary_color);
1487          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled != 0);
1488 #if FEATURE_ES
1489       case GL_POINT_SIZE_ARRAY_OES:
1490          if (ctx->API != API_OPENGLES)
1491             goto invalid_enum_error;
1492          return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Enabled != 0);
1493 #endif
1494
1495       /* GL_ARB_texture_cube_map */
1496       case GL_TEXTURE_CUBE_MAP_ARB:
1497          CHECK_EXTENSION(ARB_texture_cube_map);
1498          return is_texture_enabled(ctx, TEXTURE_CUBE_BIT);
1499
1500       /* GL_EXT_secondary_color */
1501       case GL_COLOR_SUM_EXT:
1502          if (ctx->API != API_OPENGL)
1503             goto invalid_enum_error;
1504          CHECK_EXTENSION2(EXT_secondary_color, ARB_vertex_program);
1505          return ctx->Fog.ColorSumEnabled;
1506
1507       /* GL_ARB_multisample */
1508       case GL_MULTISAMPLE_ARB:
1509          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
1510             goto invalid_enum_error;
1511          return ctx->Multisample.Enabled;
1512       case GL_SAMPLE_ALPHA_TO_COVERAGE_ARB:
1513          return ctx->Multisample.SampleAlphaToCoverage;
1514       case GL_SAMPLE_ALPHA_TO_ONE_ARB:
1515          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
1516             goto invalid_enum_error;
1517          return ctx->Multisample.SampleAlphaToOne;
1518       case GL_SAMPLE_COVERAGE_ARB:
1519          return ctx->Multisample.SampleCoverage;
1520       case GL_SAMPLE_COVERAGE_INVERT_ARB:
1521          if (!_mesa_is_desktop_gl(ctx))
1522             goto invalid_enum_error;
1523          return ctx->Multisample.SampleCoverageInvert;
1524
1525       /* GL_IBM_rasterpos_clip */
1526       case GL_RASTER_POSITION_UNCLIPPED_IBM:
1527          if (ctx->API != API_OPENGL)
1528             goto invalid_enum_error;
1529          CHECK_EXTENSION(IBM_rasterpos_clip);
1530          return ctx->Transform.RasterPositionUnclipped;
1531
1532       /* GL_NV_point_sprite */
1533       case GL_POINT_SPRITE_NV:
1534          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1535             goto invalid_enum_error;
1536          CHECK_EXTENSION2(NV_point_sprite, ARB_point_sprite)
1537          return ctx->Point.PointSprite;
1538
1539       case GL_VERTEX_PROGRAM_ARB:
1540          if (ctx->API != API_OPENGL)
1541             goto invalid_enum_error;
1542          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1543          return ctx->VertexProgram.Enabled;
1544       case GL_VERTEX_PROGRAM_POINT_SIZE_ARB:
1545          /* This was added with ARB_vertex_program, but it is also used with
1546           * GLSL vertex shaders on desktop.
1547           */
1548          if (!_mesa_is_desktop_gl(ctx))
1549             goto invalid_enum_error;
1550          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1551          return ctx->VertexProgram.PointSizeEnabled;
1552       case GL_VERTEX_PROGRAM_TWO_SIDE_ARB:
1553          if (ctx->API != API_OPENGL)
1554             goto invalid_enum_error;
1555          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1556          return ctx->VertexProgram.TwoSideEnabled;
1557
1558       case GL_VERTEX_ATTRIB_ARRAY0_NV:
1559       case GL_VERTEX_ATTRIB_ARRAY1_NV:
1560       case GL_VERTEX_ATTRIB_ARRAY2_NV:
1561       case GL_VERTEX_ATTRIB_ARRAY3_NV:
1562       case GL_VERTEX_ATTRIB_ARRAY4_NV:
1563       case GL_VERTEX_ATTRIB_ARRAY5_NV:
1564       case GL_VERTEX_ATTRIB_ARRAY6_NV:
1565       case GL_VERTEX_ATTRIB_ARRAY7_NV:
1566       case GL_VERTEX_ATTRIB_ARRAY8_NV:
1567       case GL_VERTEX_ATTRIB_ARRAY9_NV:
1568       case GL_VERTEX_ATTRIB_ARRAY10_NV:
1569       case GL_VERTEX_ATTRIB_ARRAY11_NV:
1570       case GL_VERTEX_ATTRIB_ARRAY12_NV:
1571       case GL_VERTEX_ATTRIB_ARRAY13_NV:
1572       case GL_VERTEX_ATTRIB_ARRAY14_NV:
1573       case GL_VERTEX_ATTRIB_ARRAY15_NV:
1574          if (ctx->API != API_OPENGL)
1575             goto invalid_enum_error;
1576          CHECK_EXTENSION(NV_vertex_program);
1577          {
1578             GLint n = (GLint) cap - GL_VERTEX_ATTRIB_ARRAY0_NV;
1579             ASSERT(VERT_ATTRIB_GENERIC(n) < Elements(ctx->Array.ArrayObj->VertexAttrib));
1580             return (ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_GENERIC(n)].Enabled != 0);
1581          }
1582       case GL_MAP1_VERTEX_ATTRIB0_4_NV:
1583       case GL_MAP1_VERTEX_ATTRIB1_4_NV:
1584       case GL_MAP1_VERTEX_ATTRIB2_4_NV:
1585       case GL_MAP1_VERTEX_ATTRIB3_4_NV:
1586       case GL_MAP1_VERTEX_ATTRIB4_4_NV:
1587       case GL_MAP1_VERTEX_ATTRIB5_4_NV:
1588       case GL_MAP1_VERTEX_ATTRIB6_4_NV:
1589       case GL_MAP1_VERTEX_ATTRIB7_4_NV:
1590       case GL_MAP1_VERTEX_ATTRIB8_4_NV:
1591       case GL_MAP1_VERTEX_ATTRIB9_4_NV:
1592       case GL_MAP1_VERTEX_ATTRIB10_4_NV:
1593       case GL_MAP1_VERTEX_ATTRIB11_4_NV:
1594       case GL_MAP1_VERTEX_ATTRIB12_4_NV:
1595       case GL_MAP1_VERTEX_ATTRIB13_4_NV:
1596       case GL_MAP1_VERTEX_ATTRIB14_4_NV:
1597       case GL_MAP1_VERTEX_ATTRIB15_4_NV:
1598          if (ctx->API != API_OPENGL)
1599             goto invalid_enum_error;
1600          CHECK_EXTENSION(NV_vertex_program);
1601          {
1602             const GLuint map = (GLuint) (cap - GL_MAP1_VERTEX_ATTRIB0_4_NV);
1603             return ctx->Eval.Map1Attrib[map];
1604          }
1605       case GL_MAP2_VERTEX_ATTRIB0_4_NV:
1606       case GL_MAP2_VERTEX_ATTRIB1_4_NV:
1607       case GL_MAP2_VERTEX_ATTRIB2_4_NV:
1608       case GL_MAP2_VERTEX_ATTRIB3_4_NV:
1609       case GL_MAP2_VERTEX_ATTRIB4_4_NV:
1610       case GL_MAP2_VERTEX_ATTRIB5_4_NV:
1611       case GL_MAP2_VERTEX_ATTRIB6_4_NV:
1612       case GL_MAP2_VERTEX_ATTRIB7_4_NV:
1613       case GL_MAP2_VERTEX_ATTRIB8_4_NV:
1614       case GL_MAP2_VERTEX_ATTRIB9_4_NV:
1615       case GL_MAP2_VERTEX_ATTRIB10_4_NV:
1616       case GL_MAP2_VERTEX_ATTRIB11_4_NV:
1617       case GL_MAP2_VERTEX_ATTRIB12_4_NV:
1618       case GL_MAP2_VERTEX_ATTRIB13_4_NV:
1619       case GL_MAP2_VERTEX_ATTRIB14_4_NV:
1620       case GL_MAP2_VERTEX_ATTRIB15_4_NV:
1621          if (ctx->API != API_OPENGL)
1622             goto invalid_enum_error;
1623          CHECK_EXTENSION(NV_vertex_program);
1624          {
1625             const GLuint map = (GLuint) (cap - GL_MAP2_VERTEX_ATTRIB0_4_NV);
1626             return ctx->Eval.Map2Attrib[map];
1627          }
1628
1629       case GL_FRAGMENT_PROGRAM_NV:
1630          if (ctx->API != API_OPENGL)
1631             goto invalid_enum_error;
1632          CHECK_EXTENSION(NV_fragment_program);
1633          return ctx->FragmentProgram.Enabled;
1634
1635       /* GL_NV_texture_rectangle */
1636       case GL_TEXTURE_RECTANGLE_NV:
1637          if (ctx->API != API_OPENGL)
1638             goto invalid_enum_error;
1639          CHECK_EXTENSION(NV_texture_rectangle);
1640          return is_texture_enabled(ctx, TEXTURE_RECT_BIT);
1641
1642       /* GL_EXT_stencil_two_side */
1643       case GL_STENCIL_TEST_TWO_SIDE_EXT:
1644          if (ctx->API != API_OPENGL)
1645             goto invalid_enum_error;
1646          CHECK_EXTENSION(EXT_stencil_two_side);
1647          return ctx->Stencil.TestTwoSide;
1648
1649       case GL_FRAGMENT_PROGRAM_ARB:
1650          if (ctx->API != API_OPENGL)
1651             goto invalid_enum_error;
1652          return ctx->FragmentProgram.Enabled;
1653
1654       /* GL_EXT_depth_bounds_test */
1655       case GL_DEPTH_BOUNDS_TEST_EXT:
1656          if (!_mesa_is_desktop_gl(ctx))
1657             goto invalid_enum_error;
1658          CHECK_EXTENSION(EXT_depth_bounds_test);
1659          return ctx->Depth.BoundsTest;
1660
1661       /* GL_ARB_depth_clamp */
1662       case GL_DEPTH_CLAMP:
1663          if (!_mesa_is_desktop_gl(ctx))
1664             goto invalid_enum_error;
1665          CHECK_EXTENSION(ARB_depth_clamp);
1666          return ctx->Transform.DepthClamp;
1667
1668       case GL_FRAGMENT_SHADER_ATI:
1669          if (ctx->API != API_OPENGL)
1670             goto invalid_enum_error;
1671          CHECK_EXTENSION(ATI_fragment_shader);
1672          return ctx->ATIFragmentShader.Enabled;
1673
1674       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1675          if (!_mesa_is_desktop_gl(ctx))
1676             goto invalid_enum_error;
1677          CHECK_EXTENSION(ARB_seamless_cube_map);
1678          return ctx->Texture.CubeMapSeamless;
1679
1680       case GL_RASTERIZER_DISCARD:
1681          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1682             goto invalid_enum_error;
1683          CHECK_EXTENSION(EXT_transform_feedback);
1684          return ctx->RasterDiscard;
1685
1686       /* GL_NV_primitive_restart */
1687       case GL_PRIMITIVE_RESTART_NV:
1688          if (ctx->API != API_OPENGL || !ctx->Extensions.NV_primitive_restart) {
1689             goto invalid_enum_error;
1690          }
1691          return ctx->Array.PrimitiveRestart;
1692
1693       /* GL 3.1 primitive restart */
1694       case GL_PRIMITIVE_RESTART:
1695          if (!_mesa_is_desktop_gl(ctx) || ctx->Version < 31) {
1696             goto invalid_enum_error;
1697          }
1698          return ctx->Array.PrimitiveRestart;
1699
1700       /* GL3.0 - GL_framebuffer_sRGB */
1701       case GL_FRAMEBUFFER_SRGB_EXT:
1702          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1703             goto invalid_enum_error;
1704          CHECK_EXTENSION(EXT_framebuffer_sRGB);
1705          return ctx->Color.sRGBEnabled;
1706
1707       /* GL_OES_EGL_image_external */
1708       case GL_TEXTURE_EXTERNAL_OES:
1709          if (!_mesa_is_gles(ctx))
1710             goto invalid_enum_error;
1711          CHECK_EXTENSION(OES_EGL_image_external);
1712          return is_texture_enabled(ctx, TEXTURE_EXTERNAL_BIT);
1713
1714       default:
1715          goto invalid_enum_error;
1716    }
1717
1718    return GL_FALSE;
1719
1720 invalid_enum_error:
1721    _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabled(%s)",
1722                _mesa_lookup_enum_by_nr(cap));
1723    return GL_FALSE;
1724 }