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