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
  42
  43
  44 #define CHECK_EXTENSION(EXTNAME, CAP)                                   \
  45    if (!ctx->Extensions.EXTNAME) {                                      \
  46       goto invalid_enum_error;                                          \
  47    }
  48
  49
  50 /**
  51  * Helper to enable/disable client-side state.
  52  */
  53 static void
  54 client_state(struct gl_context *ctx, GLenum cap, GLboolean state)
  55 {
  56    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
  57    GLuint flag;
  58    GLboolean *var;
  59
  60    switch (cap) {
  61       case GL_VERTEX_ARRAY:
  62          var = &arrayObj->Vertex.Enabled;
  63          flag = _NEW_ARRAY_VERTEX;
  64          break;
  65       case GL_NORMAL_ARRAY:
  66          var = &arrayObj->Normal.Enabled;
  67          flag = _NEW_ARRAY_NORMAL;
  68          break;
  69       case GL_COLOR_ARRAY:
  70          var = &arrayObj->Color.Enabled;
  71          flag = _NEW_ARRAY_COLOR0;
  72          break;
  73       case GL_INDEX_ARRAY:
  74          var = &arrayObj->Index.Enabled;
  75          flag = _NEW_ARRAY_INDEX;
  76          break;
  77       case GL_TEXTURE_COORD_ARRAY:
  78          var = &arrayObj->TexCoord[ctx->Array.ActiveTexture].Enabled;
  79          flag = _NEW_ARRAY_TEXCOORD(ctx->Array.ActiveTexture);
  80          break;
  81       case GL_EDGE_FLAG_ARRAY:
  82          var = &arrayObj->EdgeFlag.Enabled;
  83          flag = _NEW_ARRAY_EDGEFLAG;
  84          break;
  85       case GL_FOG_COORDINATE_ARRAY_EXT:
  86          var = &arrayObj->FogCoord.Enabled;
  87          flag = _NEW_ARRAY_FOGCOORD;
  88          break;
  89       case GL_SECONDARY_COLOR_ARRAY_EXT:
  90          var = &arrayObj->SecondaryColor.Enabled;
  91          flag = _NEW_ARRAY_COLOR1;
  92          break;
  93
  94 #if FEATURE_point_size_array
  95       case GL_POINT_SIZE_ARRAY_OES:
  96          var = &arrayObj->PointSize.Enabled;
  97          flag = _NEW_ARRAY_POINT_SIZE;
  98          break;
  99 #endif
 100
 101 #if FEATURE_NV_vertex_program
 102       case GL_VERTEX_ATTRIB_ARRAY0_NV:
 103       case GL_VERTEX_ATTRIB_ARRAY1_NV:
 104       case GL_VERTEX_ATTRIB_ARRAY2_NV:
 105       case GL_VERTEX_ATTRIB_ARRAY3_NV:
 106       case GL_VERTEX_ATTRIB_ARRAY4_NV:
 107       case GL_VERTEX_ATTRIB_ARRAY5_NV:
 108       case GL_VERTEX_ATTRIB_ARRAY6_NV:
 109       case GL_VERTEX_ATTRIB_ARRAY7_NV:
 110       case GL_VERTEX_ATTRIB_ARRAY8_NV:
 111       case GL_VERTEX_ATTRIB_ARRAY9_NV:
 112       case GL_VERTEX_ATTRIB_ARRAY10_NV:
 113       case GL_VERTEX_ATTRIB_ARRAY11_NV:
 114       case GL_VERTEX_ATTRIB_ARRAY12_NV:
 115       case GL_VERTEX_ATTRIB_ARRAY13_NV:
 116       case GL_VERTEX_ATTRIB_ARRAY14_NV:
 117       case GL_VERTEX_ATTRIB_ARRAY15_NV:
 118          CHECK_EXTENSION(NV_vertex_program, cap);
 119          {
 120             GLint n = (GLint) cap - GL_VERTEX_ATTRIB_ARRAY0_NV;
 121             ASSERT(n < Elements(ctx->Array.ArrayObj->VertexAttrib));
 122             var = &arrayObj->VertexAttrib[n].Enabled;
 123             flag = _NEW_ARRAY_ATTRIB(n);
 124          }
 125          break;
 126 #endif /* FEATURE_NV_vertex_program */
 127
 128       /* GL_NV_primitive_restart */
 129       case GL_PRIMITIVE_RESTART_NV:
 130          if (!ctx->Extensions.NV_primitive_restart) {
 131             goto invalid_enum_error;
 132          }
 133          var = &ctx->Array.PrimitiveRestart;
 134          flag = 0;
 135          break;
 136
 137       default:
 138          goto invalid_enum_error;
 139    }
 140
 141    if (*var == state)
 142       return;
 143
 144    FLUSH_VERTICES(ctx, _NEW_ARRAY);
 145    ctx->Array.NewState |= flag;
 146
 147    _ae_invalidate_state(ctx, _NEW_ARRAY);
 148
 149    *var = state;
 150
 151    if (state)
 152       ctx->Array.ArrayObj->_Enabled |= flag;
 153    else
 154       ctx->Array.ArrayObj->_Enabled &= ~flag;
 155
 156    if (ctx->Driver.Enable) {
 157       ctx->Driver.Enable( ctx, cap, state );
 158    }
 159
 160    return;
 161
 162 invalid_enum_error:
 163    _mesa_error(ctx, GL_INVALID_ENUM, "gl%sClientState(0x%x)",
 164                state ? "Enable" : "Disable", cap);
 165 }
 166
 167
 168 /**
 169  * Enable GL capability.
 170  * \param cap  state to enable/disable.
 171  *
 172  * Get's the current context, assures that we're outside glBegin()/glEnd() and
 173  * calls client_state().
 174  */
 175 void GLAPIENTRY
 176 _mesa_EnableClientState( GLenum cap )
 177 {
 178    GET_CURRENT_CONTEXT(ctx);
 179    ASSERT_OUTSIDE_BEGIN_END(ctx);
 180    client_state( ctx, cap, GL_TRUE );
 181 }
 182
 183
 184 /**
 185  * Disable GL capability.
 186  * \param cap  state to enable/disable.
 187  *
 188  * Get's the current context, assures that we're outside glBegin()/glEnd() and
 189  * calls client_state().
 190  */
 191 void GLAPIENTRY
 192 _mesa_DisableClientState( GLenum cap )
 193 {
 194    GET_CURRENT_CONTEXT(ctx);
 195    ASSERT_OUTSIDE_BEGIN_END(ctx);
 196    client_state( ctx, cap, GL_FALSE );
 197 }
 198
 199
 200 #undef CHECK_EXTENSION
 201 #define CHECK_EXTENSION(EXTNAME, CAP)                                   \
 202    if (!ctx->Extensions.EXTNAME) {                                      \
 203       goto invalid_enum_error;                                          \
 204    }
 205
 206 #define CHECK_EXTENSION2(EXT1, EXT2, CAP)                               \
 207    if (!ctx->Extensions.EXT1 && !ctx->Extensions.EXT2) {                \
 208       goto invalid_enum_error;                                          \
 209    }
 210
 211
 212
 213 /**
 214  * Return pointer to current texture unit for setting/getting coordinate
 215  * state.
 216  * Note that we'll set GL_INVALID_OPERATION and return NULL if the active
 217  * texture unit is higher than the number of supported coordinate units.
 218  */
 219 static struct gl_texture_unit *
 220 get_texcoord_unit(struct gl_context *ctx)
 221 {
 222    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 223       _mesa_error(ctx, GL_INVALID_OPERATION, "glEnable/Disable(texcoord unit)");
 224       return NULL;
 225    }
 226    else {
 227       return &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 228    }
 229 }
 230
 231
 232 /**
 233  * Helper function to enable or disable a texture target.
 234  * \param bit  one of the TEXTURE_x_BIT values
 235  * \return GL_TRUE if state is changing or GL_FALSE if no change
 236  */
 237 static GLboolean
 238 enable_texture(struct gl_context *ctx, GLboolean state, GLbitfield texBit)
 239 {
 240    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 241    const GLbitfield newenabled = state
 242       ? (texUnit->Enabled | texBit) : (texUnit->Enabled & ~texBit);
 243
 244    if (texUnit->Enabled == newenabled)
 245        return GL_FALSE;
 246
 247    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 248    texUnit->Enabled = newenabled;
 249    return GL_TRUE;
 250 }
 251
 252
 253 /**
 254  * Helper function to enable or disable state.
 255  *
 256  * \param ctx GL context.
 257  * \param cap  the state to enable/disable
 258  * \param state whether to enable or disable the specified capability.
 259  *
 260  * Updates the current context and flushes the vertices as needed. For
 261  * capabilities associated with extensions it verifies that those extensions
 262  * are effectivly present before updating. Notifies the driver via
 263  * dd_function_table::Enable.
 264  */
 265 void
 266 _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
 267 {
 268    if (MESA_VERBOSE & VERBOSE_API)
 269       _mesa_debug(ctx, "%s %s (newstate is %x)\n",
 270                   state ? "glEnable" : "glDisable",
 271                   _mesa_lookup_enum_by_nr(cap),
 272                   ctx->NewState);
 273
 274    switch (cap) {
 275       case GL_ALPHA_TEST:
 276          if (ctx->Color.AlphaEnabled == state)
 277             return;
 278          FLUSH_VERTICES(ctx, _NEW_COLOR);
 279          ctx->Color.AlphaEnabled = state;
 280          break;
 281       case GL_AUTO_NORMAL:
 282          if (ctx->Eval.AutoNormal == state)
 283             return;
 284          FLUSH_VERTICES(ctx, _NEW_EVAL);
 285          ctx->Eval.AutoNormal = state;
 286          break;
 287       case GL_BLEND:
 288          {
 289             GLbitfield newEnabled =
 290                state * ((1 << ctx->Const.MaxDrawBuffers) - 1);
 291             if (newEnabled != ctx->Color.BlendEnabled) {
 292                FLUSH_VERTICES(ctx, _NEW_COLOR);
 293                ctx->Color.BlendEnabled = newEnabled;
 294             }
 295          }
 296          break;
 297 #if FEATURE_userclip
 298       case GL_CLIP_PLANE0:
 299       case GL_CLIP_PLANE1:
 300       case GL_CLIP_PLANE2:
 301       case GL_CLIP_PLANE3:
 302       case GL_CLIP_PLANE4:
 303       case GL_CLIP_PLANE5:
 304          {
 305             const GLuint p = cap - GL_CLIP_PLANE0;
 306
 307             if ((ctx->Transform.ClipPlanesEnabled & (1 << p))
 308                 == ((GLuint) state << p))
 309                return;
 310
 311             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 312
 313             if (state) {
 314                ctx->Transform.ClipPlanesEnabled |= (1 << p);
 315                _mesa_update_clip_plane(ctx, p);
 316             }
 317             else {
 318                ctx->Transform.ClipPlanesEnabled &= ~(1 << p);
 319             }
 320          }
 321          break;
 322 #endif
 323       case GL_COLOR_MATERIAL:
 324          if (ctx->Light.ColorMaterialEnabled == state)
 325             return;
 326          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 327          FLUSH_CURRENT(ctx, 0);
 328          ctx->Light.ColorMaterialEnabled = state;
 329          if (state) {
 330             _mesa_update_color_material( ctx,
 331                                   ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 332          }
 333          break;
 334       case GL_CULL_FACE:
 335          if (ctx->Polygon.CullFlag == state)
 336             return;
 337          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 338          ctx->Polygon.CullFlag = state;
 339          break;
 340       case GL_DEPTH_TEST:
 341          if (ctx->Depth.Test == state)
 342             return;
 343          FLUSH_VERTICES(ctx, _NEW_DEPTH);
 344          ctx->Depth.Test = state;
 345          break;
 346       case GL_DITHER:
 347          if (ctx->Color.DitherFlag == state)
 348             return;
 349          FLUSH_VERTICES(ctx, _NEW_COLOR);
 350          ctx->Color.DitherFlag = state;
 351          break;
 352       case GL_FOG:
 353          if (ctx->Fog.Enabled == state)
 354             return;
 355          FLUSH_VERTICES(ctx, _NEW_FOG);
 356          ctx->Fog.Enabled = state;
 357          break;
 358       case GL_LIGHT0:
 359       case GL_LIGHT1:
 360       case GL_LIGHT2:
 361       case GL_LIGHT3:
 362       case GL_LIGHT4:
 363       case GL_LIGHT5:
 364       case GL_LIGHT6:
 365       case GL_LIGHT7:
 366          if (ctx->Light.Light[cap-GL_LIGHT0].Enabled == state)
 367             return;
 368          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 369          ctx->Light.Light[cap-GL_LIGHT0].Enabled = state;
 370          if (state) {
 371             insert_at_tail(&ctx->Light.EnabledList,
 372                            &ctx->Light.Light[cap-GL_LIGHT0]);
 373          }
 374          else {
 375             remove_from_list(&ctx->Light.Light[cap-GL_LIGHT0]);
 376          }
 377          break;
 378       case GL_LIGHTING:
 379          if (ctx->Light.Enabled == state)
 380             return;
 381          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 382          ctx->Light.Enabled = state;
 383          if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
 384             ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE;
 385          else
 386             ctx->_TriangleCaps &= ~DD_TRI_LIGHT_TWOSIDE;
 387          break;
 388       case GL_LINE_SMOOTH:
 389          if (ctx->Line.SmoothFlag == state)
 390             return;
 391          FLUSH_VERTICES(ctx, _NEW_LINE);
 392          ctx->Line.SmoothFlag = state;
 393          ctx->_TriangleCaps ^= DD_LINE_SMOOTH;
 394          break;
 395       case GL_LINE_STIPPLE:
 396          if (ctx->Line.StippleFlag == state)
 397             return;
 398          FLUSH_VERTICES(ctx, _NEW_LINE);
 399          ctx->Line.StippleFlag = state;
 400          ctx->_TriangleCaps ^= DD_LINE_STIPPLE;
 401          break;
 402       case GL_INDEX_LOGIC_OP:
 403          if (ctx->Color.IndexLogicOpEnabled == state)
 404             return;
 405          FLUSH_VERTICES(ctx, _NEW_COLOR);
 406          ctx->Color.IndexLogicOpEnabled = state;
 407          break;
 408       case GL_COLOR_LOGIC_OP:
 409          if (ctx->Color.ColorLogicOpEnabled == state)
 410             return;
 411          FLUSH_VERTICES(ctx, _NEW_COLOR);
 412          ctx->Color.ColorLogicOpEnabled = state;
 413          break;
 414       case GL_MAP1_COLOR_4:
 415          if (ctx->Eval.Map1Color4 == state)
 416             return;
 417          FLUSH_VERTICES(ctx, _NEW_EVAL);
 418          ctx->Eval.Map1Color4 = state;
 419          break;
 420       case GL_MAP1_INDEX:
 421          if (ctx->Eval.Map1Index == state)
 422             return;
 423          FLUSH_VERTICES(ctx, _NEW_EVAL);
 424          ctx->Eval.Map1Index = state;
 425          break;
 426       case GL_MAP1_NORMAL:
 427          if (ctx->Eval.Map1Normal == state)
 428             return;
 429          FLUSH_VERTICES(ctx, _NEW_EVAL);
 430          ctx->Eval.Map1Normal = state;
 431          break;
 432       case GL_MAP1_TEXTURE_COORD_1:
 433          if (ctx->Eval.Map1TextureCoord1 == state)
 434             return;
 435          FLUSH_VERTICES(ctx, _NEW_EVAL);
 436          ctx->Eval.Map1TextureCoord1 = state;
 437          break;
 438       case GL_MAP1_TEXTURE_COORD_2:
 439          if (ctx->Eval.Map1TextureCoord2 == state)
 440             return;
 441          FLUSH_VERTICES(ctx, _NEW_EVAL);
 442          ctx->Eval.Map1TextureCoord2 = state;
 443          break;
 444       case GL_MAP1_TEXTURE_COORD_3:
 445          if (ctx->Eval.Map1TextureCoord3 == state)
 446             return;
 447          FLUSH_VERTICES(ctx, _NEW_EVAL);
 448          ctx->Eval.Map1TextureCoord3 = state;
 449          break;
 450       case GL_MAP1_TEXTURE_COORD_4:
 451          if (ctx->Eval.Map1TextureCoord4 == state)
 452             return;
 453          FLUSH_VERTICES(ctx, _NEW_EVAL);
 454          ctx->Eval.Map1TextureCoord4 = state;
 455          break;
 456       case GL_MAP1_VERTEX_3:
 457          if (ctx->Eval.Map1Vertex3 == state)
 458             return;
 459          FLUSH_VERTICES(ctx, _NEW_EVAL);
 460          ctx->Eval.Map1Vertex3 = state;
 461          break;
 462       case GL_MAP1_VERTEX_4:
 463          if (ctx->Eval.Map1Vertex4 == state)
 464             return;
 465          FLUSH_VERTICES(ctx, _NEW_EVAL);
 466          ctx->Eval.Map1Vertex4 = state;
 467          break;
 468       case GL_MAP2_COLOR_4:
 469          if (ctx->Eval.Map2Color4 == state)
 470             return;
 471          FLUSH_VERTICES(ctx, _NEW_EVAL);
 472          ctx->Eval.Map2Color4 = state;
 473          break;
 474       case GL_MAP2_INDEX:
 475          if (ctx->Eval.Map2Index == state)
 476             return;
 477          FLUSH_VERTICES(ctx, _NEW_EVAL);
 478          ctx->Eval.Map2Index = state;
 479          break;
 480       case GL_MAP2_NORMAL:
 481          if (ctx->Eval.Map2Normal == state)
 482             return;
 483          FLUSH_VERTICES(ctx, _NEW_EVAL);
 484          ctx->Eval.Map2Normal = state;
 485          break;
 486       case GL_MAP2_TEXTURE_COORD_1:
 487          if (ctx->Eval.Map2TextureCoord1 == state)
 488             return;
 489          FLUSH_VERTICES(ctx, _NEW_EVAL);
 490          ctx->Eval.Map2TextureCoord1 = state;
 491          break;
 492       case GL_MAP2_TEXTURE_COORD_2:
 493          if (ctx->Eval.Map2TextureCoord2 == state)
 494             return;
 495          FLUSH_VERTICES(ctx, _NEW_EVAL);
 496          ctx->Eval.Map2TextureCoord2 = state;
 497          break;
 498       case GL_MAP2_TEXTURE_COORD_3:
 499          if (ctx->Eval.Map2TextureCoord3 == state)
 500             return;
 501          FLUSH_VERTICES(ctx, _NEW_EVAL);
 502          ctx->Eval.Map2TextureCoord3 = state;
 503          break;
 504       case GL_MAP2_TEXTURE_COORD_4:
 505          if (ctx->Eval.Map2TextureCoord4 == state)
 506             return;
 507          FLUSH_VERTICES(ctx, _NEW_EVAL);
 508          ctx->Eval.Map2TextureCoord4 = state;
 509          break;
 510       case GL_MAP2_VERTEX_3:
 511          if (ctx->Eval.Map2Vertex3 == state)
 512             return;
 513          FLUSH_VERTICES(ctx, _NEW_EVAL);
 514          ctx->Eval.Map2Vertex3 = state;
 515          break;
 516       case GL_MAP2_VERTEX_4:
 517          if (ctx->Eval.Map2Vertex4 == state)
 518             return;
 519          FLUSH_VERTICES(ctx, _NEW_EVAL);
 520          ctx->Eval.Map2Vertex4 = state;
 521          break;
 522       case GL_NORMALIZE:
 523          if (ctx->Transform.Normalize == state)
 524             return;
 525          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 526          ctx->Transform.Normalize = state;
 527          break;
 528       case GL_POINT_SMOOTH:
 529          if (ctx->Point.SmoothFlag == state)
 530             return;
 531          FLUSH_VERTICES(ctx, _NEW_POINT);
 532          ctx->Point.SmoothFlag = state;
 533          ctx->_TriangleCaps ^= DD_POINT_SMOOTH;
 534          break;
 535       case GL_POLYGON_SMOOTH:
 536          if (ctx->Polygon.SmoothFlag == state)
 537             return;
 538          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 539          ctx->Polygon.SmoothFlag = state;
 540          ctx->_TriangleCaps ^= DD_TRI_SMOOTH;
 541          break;
 542       case GL_POLYGON_STIPPLE:
 543          if (ctx->Polygon.StippleFlag == state)
 544             return;
 545          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 546          ctx->Polygon.StippleFlag = state;
 547          ctx->_TriangleCaps ^= DD_TRI_STIPPLE;
 548          break;
 549       case GL_POLYGON_OFFSET_POINT:
 550          if (ctx->Polygon.OffsetPoint == state)
 551             return;
 552          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 553          ctx->Polygon.OffsetPoint = state;
 554          break;
 555       case GL_POLYGON_OFFSET_LINE:
 556          if (ctx->Polygon.OffsetLine == state)
 557             return;
 558          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 559          ctx->Polygon.OffsetLine = state;
 560          break;
 561       case GL_POLYGON_OFFSET_FILL:
 562          if (ctx->Polygon.OffsetFill == state)
 563             return;
 564          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 565          ctx->Polygon.OffsetFill = state;
 566          break;
 567       case GL_RESCALE_NORMAL_EXT:
 568          if (ctx->Transform.RescaleNormals == state)
 569             return;
 570          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 571          ctx->Transform.RescaleNormals = state;
 572          break;
 573       case GL_SCISSOR_TEST:
 574          if (ctx->Scissor.Enabled == state)
 575             return;
 576          FLUSH_VERTICES(ctx, _NEW_SCISSOR);
 577          ctx->Scissor.Enabled = state;
 578          break;
 579       case GL_SHARED_TEXTURE_PALETTE_EXT:
 580          if (ctx->Texture.SharedPalette == state)
 581             return;
 582          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 583          ctx->Texture.SharedPalette = state;
 584          break;
 585       case GL_STENCIL_TEST:
 586          if (ctx->Stencil.Enabled == state)
 587             return;
 588          FLUSH_VERTICES(ctx, _NEW_STENCIL);
 589          ctx->Stencil.Enabled = state;
 590          break;
 591       case GL_TEXTURE_1D:
 592          if (!enable_texture(ctx, state, TEXTURE_1D_BIT)) {
 593             return;
 594          }
 595          break;
 596       case GL_TEXTURE_2D:
 597          if (!enable_texture(ctx, state, TEXTURE_2D_BIT)) {
 598             return;
 599          }
 600          break;
 601       case GL_TEXTURE_3D:
 602          if (!enable_texture(ctx, state, TEXTURE_3D_BIT)) {
 603             return;
 604          }
 605          break;
 606       case GL_TEXTURE_GEN_S:
 607       case GL_TEXTURE_GEN_T:
 608       case GL_TEXTURE_GEN_R:
 609       case GL_TEXTURE_GEN_Q:
 610          {
 611             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 612             if (texUnit) {
 613                GLbitfield coordBit = S_BIT << (cap - GL_TEXTURE_GEN_S);
 614                GLbitfield newenabled = texUnit->TexGenEnabled & ~coordBit;
 615                if (state)
 616                   newenabled |= coordBit;
 617                if (texUnit->TexGenEnabled == newenabled)
 618                   return;
 619                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 620                texUnit->TexGenEnabled = newenabled;
 621             }
 622          }
 623          break;
 624
 625 #if FEATURE_ES1
 626       case GL_TEXTURE_GEN_STR_OES:
 627          /* disable S, T, and R at the same time */
 628          {
 629             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 630             if (texUnit) {
 631                GLuint newenabled =
 632                   texUnit->TexGenEnabled & ~STR_BITS;
 633                if (state)
 634                   newenabled |= STR_BITS;
 635                if (texUnit->TexGenEnabled == newenabled)
 636                   return;
 637                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 638                texUnit->TexGenEnabled = newenabled;
 639             }
 640          }
 641          break;
 642 #endif
 643
 644       /* client-side state */
 645       case GL_VERTEX_ARRAY:
 646       case GL_NORMAL_ARRAY:
 647       case GL_COLOR_ARRAY:
 648       case GL_INDEX_ARRAY:
 649       case GL_TEXTURE_COORD_ARRAY:
 650       case GL_EDGE_FLAG_ARRAY:
 651       case GL_FOG_COORDINATE_ARRAY_EXT:
 652       case GL_SECONDARY_COLOR_ARRAY_EXT:
 653       case GL_POINT_SIZE_ARRAY_OES:
 654          client_state( ctx, cap, state );
 655          return;
 656
 657       /* GL_ARB_texture_cube_map */
 658       case GL_TEXTURE_CUBE_MAP_ARB:
 659          CHECK_EXTENSION(ARB_texture_cube_map, cap);
 660          if (!enable_texture(ctx, state, TEXTURE_CUBE_BIT)) {
 661             return;
 662          }
 663          break;
 664
 665       /* GL_EXT_secondary_color */
 666       case GL_COLOR_SUM_EXT:
 667          CHECK_EXTENSION2(EXT_secondary_color, ARB_vertex_program, cap);
 668          if (ctx->Fog.ColorSumEnabled == state)
 669             return;
 670          FLUSH_VERTICES(ctx, _NEW_FOG);
 671          ctx->Fog.ColorSumEnabled = state;
 672          break;
 673
 674       /* GL_ARB_multisample */
 675       case GL_MULTISAMPLE_ARB:
 676          if (ctx->Multisample.Enabled == state)
 677             return;
 678          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 679          ctx->Multisample.Enabled = state;
 680          break;
 681       case GL_SAMPLE_ALPHA_TO_COVERAGE_ARB:
 682          if (ctx->Multisample.SampleAlphaToCoverage == state)
 683             return;
 684          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 685          ctx->Multisample.SampleAlphaToCoverage = state;
 686          break;
 687       case GL_SAMPLE_ALPHA_TO_ONE_ARB:
 688          if (ctx->Multisample.SampleAlphaToOne == state)
 689             return;
 690          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 691          ctx->Multisample.SampleAlphaToOne = state;
 692          break;
 693       case GL_SAMPLE_COVERAGE_ARB:
 694          if (ctx->Multisample.SampleCoverage == state)
 695             return;
 696          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 697          ctx->Multisample.SampleCoverage = state;
 698          break;
 699       case GL_SAMPLE_COVERAGE_INVERT_ARB:
 700          if (ctx->Multisample.SampleCoverageInvert == state)
 701             return;
 702          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 703          ctx->Multisample.SampleCoverageInvert = state;
 704          break;
 705
 706       /* GL_IBM_rasterpos_clip */
 707       case GL_RASTER_POSITION_UNCLIPPED_IBM:
 708          CHECK_EXTENSION(IBM_rasterpos_clip, cap);
 709          if (ctx->Transform.RasterPositionUnclipped == state)
 710             return;
 711          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 712          ctx->Transform.RasterPositionUnclipped = state;
 713          break;
 714
 715       /* GL_NV_point_sprite */
 716       case GL_POINT_SPRITE_NV:
 717          CHECK_EXTENSION2(NV_point_sprite, ARB_point_sprite, cap);
 718          if (ctx->Point.PointSprite == state)
 719             return;
 720          FLUSH_VERTICES(ctx, _NEW_POINT);
 721          ctx->Point.PointSprite = state;
 722          break;
 723
 724 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 725       case GL_VERTEX_PROGRAM_ARB:
 726          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 727          if (ctx->VertexProgram.Enabled == state)
 728             return;
 729          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 730          ctx->VertexProgram.Enabled = state;
 731          break;
 732       case GL_VERTEX_PROGRAM_POINT_SIZE_ARB:
 733          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 734          if (ctx->VertexProgram.PointSizeEnabled == state)
 735             return;
 736          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 737          ctx->VertexProgram.PointSizeEnabled = state;
 738          break;
 739       case GL_VERTEX_PROGRAM_TWO_SIDE_ARB:
 740          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program, cap);
 741          if (ctx->VertexProgram.TwoSideEnabled == state)
 742             return;
 743          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 744          ctx->VertexProgram.TwoSideEnabled = state;
 745          break;
 746 #endif
 747 #if FEATURE_NV_vertex_program
 748       case GL_MAP1_VERTEX_ATTRIB0_4_NV:
 749       case GL_MAP1_VERTEX_ATTRIB1_4_NV:
 750       case GL_MAP1_VERTEX_ATTRIB2_4_NV:
 751       case GL_MAP1_VERTEX_ATTRIB3_4_NV:
 752       case GL_MAP1_VERTEX_ATTRIB4_4_NV:
 753       case GL_MAP1_VERTEX_ATTRIB5_4_NV:
 754       case GL_MAP1_VERTEX_ATTRIB6_4_NV:
 755       case GL_MAP1_VERTEX_ATTRIB7_4_NV:
 756       case GL_MAP1_VERTEX_ATTRIB8_4_NV:
 757       case GL_MAP1_VERTEX_ATTRIB9_4_NV:
 758       case GL_MAP1_VERTEX_ATTRIB10_4_NV:
 759       case GL_MAP1_VERTEX_ATTRIB11_4_NV:
 760       case GL_MAP1_VERTEX_ATTRIB12_4_NV:
 761       case GL_MAP1_VERTEX_ATTRIB13_4_NV:
 762       case GL_MAP1_VERTEX_ATTRIB14_4_NV:
 763       case GL_MAP1_VERTEX_ATTRIB15_4_NV:
 764          CHECK_EXTENSION(NV_vertex_program, cap);
 765          {
 766             const GLuint map = (GLuint) (cap - GL_MAP1_VERTEX_ATTRIB0_4_NV);
 767             FLUSH_VERTICES(ctx, _NEW_EVAL);
 768             ctx->Eval.Map1Attrib[map] = state;
 769          }
 770          break;
 771       case GL_MAP2_VERTEX_ATTRIB0_4_NV:
 772       case GL_MAP2_VERTEX_ATTRIB1_4_NV:
 773       case GL_MAP2_VERTEX_ATTRIB2_4_NV:
 774       case GL_MAP2_VERTEX_ATTRIB3_4_NV:
 775       case GL_MAP2_VERTEX_ATTRIB4_4_NV:
 776       case GL_MAP2_VERTEX_ATTRIB5_4_NV:
 777       case GL_MAP2_VERTEX_ATTRIB6_4_NV:
 778       case GL_MAP2_VERTEX_ATTRIB7_4_NV:
 779       case GL_MAP2_VERTEX_ATTRIB8_4_NV:
 780       case GL_MAP2_VERTEX_ATTRIB9_4_NV:
 781       case GL_MAP2_VERTEX_ATTRIB10_4_NV:
 782       case GL_MAP2_VERTEX_ATTRIB11_4_NV:
 783       case GL_MAP2_VERTEX_ATTRIB12_4_NV:
 784       case GL_MAP2_VERTEX_ATTRIB13_4_NV:
 785       case GL_MAP2_VERTEX_ATTRIB14_4_NV:
 786       case GL_MAP2_VERTEX_ATTRIB15_4_NV:
 787          CHECK_EXTENSION(NV_vertex_program, cap);
 788          {
 789             const GLuint map = (GLuint) (cap - GL_MAP2_VERTEX_ATTRIB0_4_NV);
 790             FLUSH_VERTICES(ctx, _NEW_EVAL);
 791             ctx->Eval.Map2Attrib[map] = state;
 792          }
 793          break;
 794 #endif /* FEATURE_NV_vertex_program */
 795
 796 #if FEATURE_NV_fragment_program
 797       case GL_FRAGMENT_PROGRAM_NV:
 798          CHECK_EXTENSION(NV_fragment_program, cap);
 799          if (ctx->FragmentProgram.Enabled == state)
 800             return;
 801          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 802          ctx->FragmentProgram.Enabled = state;
 803          break;
 804 #endif /* FEATURE_NV_fragment_program */
 805
 806       /* GL_NV_texture_rectangle */
 807       case GL_TEXTURE_RECTANGLE_NV:
 808          CHECK_EXTENSION(NV_texture_rectangle, cap);
 809          if (!enable_texture(ctx, state, TEXTURE_RECT_BIT)) {
 810             return;
 811          }
 812          break;
 813
 814       /* GL_EXT_stencil_two_side */
 815       case GL_STENCIL_TEST_TWO_SIDE_EXT:
 816          CHECK_EXTENSION(EXT_stencil_two_side, cap);
 817          if (ctx->Stencil.TestTwoSide == state)
 818             return;
 819          FLUSH_VERTICES(ctx, _NEW_STENCIL);
 820          ctx->Stencil.TestTwoSide = state;
 821          if (state) {
 822             ctx->Stencil._BackFace = 2;
 823             ctx->_TriangleCaps |= DD_TRI_TWOSTENCIL;
 824          } else {
 825             ctx->Stencil._BackFace = 1;
 826             ctx->_TriangleCaps &= ~DD_TRI_TWOSTENCIL;
 827          }
 828          break;
 829
 830 #if FEATURE_ARB_fragment_program
 831       case GL_FRAGMENT_PROGRAM_ARB:
 832          CHECK_EXTENSION(ARB_fragment_program, cap);
 833          if (ctx->FragmentProgram.Enabled == state)
 834             return;
 835          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 836          ctx->FragmentProgram.Enabled = state;
 837          break;
 838 #endif /* FEATURE_ARB_fragment_program */
 839
 840       /* GL_EXT_depth_bounds_test */
 841       case GL_DEPTH_BOUNDS_TEST_EXT:
 842          CHECK_EXTENSION(EXT_depth_bounds_test, cap);
 843          if (ctx->Depth.BoundsTest == state)
 844             return;
 845          FLUSH_VERTICES(ctx, _NEW_DEPTH);
 846          ctx->Depth.BoundsTest = state;
 847          break;
 848
 849       case GL_DEPTH_CLAMP:
 850          if (ctx->Transform.DepthClamp == state)
 851             return;
 852          CHECK_EXTENSION(ARB_depth_clamp, cap);
 853          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 854          ctx->Transform.DepthClamp = state;
 855          break;
 856
 857 #if FEATURE_ATI_fragment_shader
 858       case GL_FRAGMENT_SHADER_ATI:
 859         CHECK_EXTENSION(ATI_fragment_shader, cap);
 860         if (ctx->ATIFragmentShader.Enabled == state)
 861           return;
 862         FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 863         ctx->ATIFragmentShader.Enabled = state;
 864         break;
 865 #endif
 866
 867       /* GL_MESA_texture_array */
 868       case GL_TEXTURE_1D_ARRAY_EXT:
 869          CHECK_EXTENSION(MESA_texture_array, cap);
 870          if (!enable_texture(ctx, state, TEXTURE_1D_ARRAY_BIT)) {
 871             return;
 872          }
 873          break;
 874
 875       case GL_TEXTURE_2D_ARRAY_EXT:
 876          CHECK_EXTENSION(MESA_texture_array, cap);
 877          if (!enable_texture(ctx, state, TEXTURE_2D_ARRAY_BIT)) {
 878             return;
 879          }
 880          break;
 881
 882       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 883          CHECK_EXTENSION(ARB_seamless_cube_map, cap);
 884          if (ctx->Texture.CubeMapSeamless != state) {
 885             FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 886             ctx->Texture.CubeMapSeamless = state;
 887          }
 888          break;
 889
 890 #if FEATURE_EXT_transform_feedback
 891       case GL_RASTERIZER_DISCARD:
 892          CHECK_EXTENSION(EXT_transform_feedback, cap);
 893          if (ctx->TransformFeedback.RasterDiscard != state) {
 894             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 895             ctx->TransformFeedback.RasterDiscard = state;
 896          }
 897          break;
 898 #endif
 899
 900       /* GL 3.1 primitive restart.  Note: this enum is different from
 901        * GL_PRIMITIVE_RESTART_NV (which is client state).
 902        */
 903       case GL_PRIMITIVE_RESTART:
 904          if (ctx->VersionMajor * 10 + ctx->VersionMinor < 31) {
 905             goto invalid_enum_error;
 906          }
 907          if (ctx->Array.PrimitiveRestart != state) {
 908             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 909             ctx->Array.PrimitiveRestart = state;
 910          }
 911          break;
 912
 913       /* GL3.0 - GL_framebuffer_sRGB */
 914       case GL_FRAMEBUFFER_SRGB_EXT:
 915          CHECK_EXTENSION(EXT_framebuffer_sRGB, cap);
 916          FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 917          ctx->Color.sRGBEnabled = state;
 918          break;
 919
 920       default:
 921          goto invalid_enum_error;
 922    }
 923
 924    if (ctx->Driver.Enable) {
 925       ctx->Driver.Enable( ctx, cap, state );
 926    }
 927
 928    return;
 929
 930 invalid_enum_error:
 931    _mesa_error(ctx, GL_INVALID_ENUM, "gl%s(0x%x)",
 932                state ? "Enable" : "Disable", cap);
 933 }
 934
 935
 936 /**
 937  * Enable GL capability.  Called by glEnable()
 938  * \param cap  state to enable.
 939  */
 940 void GLAPIENTRY
 941 _mesa_Enable( GLenum cap )
 942 {
 943    GET_CURRENT_CONTEXT(ctx);
 944    ASSERT_OUTSIDE_BEGIN_END(ctx);
 945
 946    _mesa_set_enable( ctx, cap, GL_TRUE );
 947 }
 948
 949
 950 /**
 951  * Disable GL capability.  Called by glDisable()
 952  * \param cap  state to disable.
 953  */
 954 void GLAPIENTRY
 955 _mesa_Disable( GLenum cap )
 956 {
 957    GET_CURRENT_CONTEXT(ctx);
 958    ASSERT_OUTSIDE_BEGIN_END(ctx);
 959
 960    _mesa_set_enable( ctx, cap, GL_FALSE );
 961 }
 962
 963
 964
 965 /**
 966  * Enable/disable an indexed state var.
 967  */
 968 void
 969 _mesa_set_enablei(struct gl_context *ctx, GLenum cap,
 970                   GLuint index, GLboolean state)
 971 {
 972    ASSERT(state == 0 || state == 1);
 973    switch (cap) {
 974    case GL_BLEND:
 975       if (!ctx->Extensions.EXT_draw_buffers2) {
 976          goto invalid_enum_error;
 977       }
 978       if (index >= ctx->Const.MaxDrawBuffers) {
 979          _mesa_error(ctx, GL_INVALID_VALUE, "%s(index=%u)",
 980                      state ? "glEnableIndexed" : "glDisableIndexed", index);
 981          return;
 982       }
 983       if (((ctx->Color.BlendEnabled >> index) & 1) != state) {
 984          FLUSH_VERTICES(ctx, _NEW_COLOR);
 985          if (state)
 986             ctx->Color.BlendEnabled |= (1 << index);
 987          else
 988             ctx->Color.BlendEnabled &= ~(1 << index);
 989       }
 990       break;
 991    default:
 992       goto invalid_enum_error;
 993    }
 994    return;
 995
 996 invalid_enum_error:
 997     _mesa_error(ctx, GL_INVALID_ENUM, "%s(cap=%s)",
 998                 state ? "glEnablei" : "glDisablei",
 999                 _mesa_lookup_enum_by_nr(cap));
1000 }
1001
1002
1003 void GLAPIENTRY
1004 _mesa_DisableIndexed( GLenum cap, GLuint index )
1005 {
1006    GET_CURRENT_CONTEXT(ctx);
1007    ASSERT_OUTSIDE_BEGIN_END(ctx);
1008    _mesa_set_enablei(ctx, cap, index, GL_FALSE);
1009 }
1010
1011
1012 void GLAPIENTRY
1013 _mesa_EnableIndexed( GLenum cap, GLuint index )
1014 {
1015    GET_CURRENT_CONTEXT(ctx);
1016    ASSERT_OUTSIDE_BEGIN_END(ctx);
1017    _mesa_set_enablei(ctx, cap, index, GL_TRUE);
1018 }
1019
1020
1021 GLboolean GLAPIENTRY
1022 _mesa_IsEnabledIndexed( GLenum cap, GLuint index )
1023 {
1024    GET_CURRENT_CONTEXT(ctx);
1025    switch (cap) {
1026    case GL_BLEND:
1027       if (index >= ctx->Const.MaxDrawBuffers) {
1028          _mesa_error(ctx, GL_INVALID_VALUE, "glIsEnabledIndexed(index=%u)",
1029                      index);
1030          return GL_FALSE;
1031       }
1032       return (ctx->Color.BlendEnabled >> index) & 1;
1033    default:
1034       _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabledIndexed(cap=%s)",
1035                   _mesa_lookup_enum_by_nr(cap));
1036       return GL_FALSE;
1037    }
1038 }
1039
1040
1041
1042
1043 #undef CHECK_EXTENSION
1044 #define CHECK_EXTENSION(EXTNAME)                        \
1045    if (!ctx->Extensions.EXTNAME) {                      \
1046       goto invalid_enum_error;                          \
1047    }
1048
1049 #undef CHECK_EXTENSION2
1050 #define CHECK_EXTENSION2(EXT1, EXT2)                            \
1051    if (!ctx->Extensions.EXT1 && !ctx->Extensions.EXT2) {        \
1052       goto invalid_enum_error;                                  \
1053    }
1054
1055
1056 /**
1057  * Helper function to determine whether a texture target is enabled.
1058  */
1059 static GLboolean
1060 is_texture_enabled(struct gl_context *ctx, GLbitfield bit)
1061 {
1062    const struct gl_texture_unit *const texUnit =
1063        &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
1064    return (texUnit->Enabled & bit) ? GL_TRUE : GL_FALSE;
1065 }
1066
1067
1068 /**
1069  * Return simple enable/disable state.
1070  *
1071  * \param cap  state variable to query.
1072  *
1073  * Returns the state of the specified capability from the current GL context.
1074  * For the capabilities associated with extensions verifies that those
1075  * extensions are effectively present before reporting.
1076  */
1077 GLboolean GLAPIENTRY
1078 _mesa_IsEnabled( GLenum cap )
1079 {
1080    GET_CURRENT_CONTEXT(ctx);
1081    switch (cap) {
1082       case GL_ALPHA_TEST:
1083          return ctx->Color.AlphaEnabled;
1084       case GL_AUTO_NORMAL:
1085          return ctx->Eval.AutoNormal;
1086       case GL_BLEND:
1087          return ctx->Color.BlendEnabled & 1;  /* return state for buffer[0] */
1088       case GL_CLIP_PLANE0:
1089       case GL_CLIP_PLANE1:
1090       case GL_CLIP_PLANE2:
1091       case GL_CLIP_PLANE3:
1092       case GL_CLIP_PLANE4:
1093       case GL_CLIP_PLANE5:
1094          return (ctx->Transform.ClipPlanesEnabled >> (cap - GL_CLIP_PLANE0)) & 1;
1095       case GL_COLOR_MATERIAL:
1096          return ctx->Light.ColorMaterialEnabled;
1097       case GL_CULL_FACE:
1098          return ctx->Polygon.CullFlag;
1099       case GL_DEPTH_TEST:
1100          return ctx->Depth.Test;
1101       case GL_DITHER:
1102          return ctx->Color.DitherFlag;
1103       case GL_FOG:
1104          return ctx->Fog.Enabled;
1105       case GL_LIGHTING:
1106          return ctx->Light.Enabled;
1107       case GL_LIGHT0:
1108       case GL_LIGHT1:
1109       case GL_LIGHT2:
1110       case GL_LIGHT3:
1111       case GL_LIGHT4:
1112       case GL_LIGHT5:
1113       case GL_LIGHT6:
1114       case GL_LIGHT7:
1115          return ctx->Light.Light[cap-GL_LIGHT0].Enabled;
1116       case GL_LINE_SMOOTH:
1117          return ctx->Line.SmoothFlag;
1118       case GL_LINE_STIPPLE:
1119          return ctx->Line.StippleFlag;
1120       case GL_INDEX_LOGIC_OP:
1121          return ctx->Color.IndexLogicOpEnabled;
1122       case GL_COLOR_LOGIC_OP:
1123          return ctx->Color.ColorLogicOpEnabled;
1124       case GL_MAP1_COLOR_4:
1125          return ctx->Eval.Map1Color4;
1126       case GL_MAP1_INDEX:
1127          return ctx->Eval.Map1Index;
1128       case GL_MAP1_NORMAL:
1129          return ctx->Eval.Map1Normal;
1130       case GL_MAP1_TEXTURE_COORD_1:
1131          return ctx->Eval.Map1TextureCoord1;
1132       case GL_MAP1_TEXTURE_COORD_2:
1133          return ctx->Eval.Map1TextureCoord2;
1134       case GL_MAP1_TEXTURE_COORD_3:
1135          return ctx->Eval.Map1TextureCoord3;
1136       case GL_MAP1_TEXTURE_COORD_4:
1137          return ctx->Eval.Map1TextureCoord4;
1138       case GL_MAP1_VERTEX_3:
1139          return ctx->Eval.Map1Vertex3;
1140       case GL_MAP1_VERTEX_4:
1141          return ctx->Eval.Map1Vertex4;
1142       case GL_MAP2_COLOR_4:
1143          return ctx->Eval.Map2Color4;
1144       case GL_MAP2_INDEX:
1145          return ctx->Eval.Map2Index;
1146       case GL_MAP2_NORMAL:
1147          return ctx->Eval.Map2Normal;
1148       case GL_MAP2_TEXTURE_COORD_1:
1149          return ctx->Eval.Map2TextureCoord1;
1150       case GL_MAP2_TEXTURE_COORD_2:
1151          return ctx->Eval.Map2TextureCoord2;
1152       case GL_MAP2_TEXTURE_COORD_3:
1153          return ctx->Eval.Map2TextureCoord3;
1154       case GL_MAP2_TEXTURE_COORD_4:
1155          return ctx->Eval.Map2TextureCoord4;
1156       case GL_MAP2_VERTEX_3:
1157          return ctx->Eval.Map2Vertex3;
1158       case GL_MAP2_VERTEX_4:
1159          return ctx->Eval.Map2Vertex4;
1160       case GL_NORMALIZE:
1161          return ctx->Transform.Normalize;
1162       case GL_POINT_SMOOTH:
1163          return ctx->Point.SmoothFlag;
1164       case GL_POLYGON_SMOOTH:
1165          return ctx->Polygon.SmoothFlag;
1166       case GL_POLYGON_STIPPLE:
1167          return ctx->Polygon.StippleFlag;
1168       case GL_POLYGON_OFFSET_POINT:
1169          return ctx->Polygon.OffsetPoint;
1170       case GL_POLYGON_OFFSET_LINE:
1171          return ctx->Polygon.OffsetLine;
1172       case GL_POLYGON_OFFSET_FILL:
1173          return ctx->Polygon.OffsetFill;
1174       case GL_RESCALE_NORMAL_EXT:
1175          return ctx->Transform.RescaleNormals;
1176       case GL_SCISSOR_TEST:
1177          return ctx->Scissor.Enabled;
1178       case GL_SHARED_TEXTURE_PALETTE_EXT:
1179          return ctx->Texture.SharedPalette;
1180       case GL_STENCIL_TEST:
1181          return ctx->Stencil.Enabled;
1182       case GL_TEXTURE_1D:
1183          return is_texture_enabled(ctx, TEXTURE_1D_BIT);
1184       case GL_TEXTURE_2D:
1185          return is_texture_enabled(ctx, TEXTURE_2D_BIT);
1186       case GL_TEXTURE_3D:
1187          return is_texture_enabled(ctx, TEXTURE_3D_BIT);
1188       case GL_TEXTURE_GEN_S:
1189       case GL_TEXTURE_GEN_T:
1190       case GL_TEXTURE_GEN_R:
1191       case GL_TEXTURE_GEN_Q:
1192          {
1193             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1194             if (texUnit) {
1195                GLbitfield coordBit = S_BIT << (cap - GL_TEXTURE_GEN_S);
1196                return (texUnit->TexGenEnabled & coordBit) ? GL_TRUE : GL_FALSE;
1197             }
1198          }
1199          return GL_FALSE;
1200 #if FEATURE_ES1
1201       case GL_TEXTURE_GEN_STR_OES:
1202          {
1203             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1204             if (texUnit) {
1205                return (texUnit->TexGenEnabled & STR_BITS) == STR_BITS
1206                   ? GL_TRUE : GL_FALSE;
1207             }
1208          }
1209 #endif
1210
1211       /* client-side state */
1212       case GL_VERTEX_ARRAY:
1213          return (ctx->Array.ArrayObj->Vertex.Enabled != 0);
1214       case GL_NORMAL_ARRAY:
1215          return (ctx->Array.ArrayObj->Normal.Enabled != 0);
1216       case GL_COLOR_ARRAY:
1217          return (ctx->Array.ArrayObj->Color.Enabled != 0);
1218       case GL_INDEX_ARRAY:
1219          return (ctx->Array.ArrayObj->Index.Enabled != 0);
1220       case GL_TEXTURE_COORD_ARRAY:
1221          return (ctx->Array.ArrayObj->TexCoord[ctx->Array.ActiveTexture]
1222                  .Enabled != 0);
1223       case GL_EDGE_FLAG_ARRAY:
1224          return (ctx->Array.ArrayObj->EdgeFlag.Enabled != 0);
1225       case GL_FOG_COORDINATE_ARRAY_EXT:
1226          CHECK_EXTENSION(EXT_fog_coord);
1227          return (ctx->Array.ArrayObj->FogCoord.Enabled != 0);
1228       case GL_SECONDARY_COLOR_ARRAY_EXT:
1229          CHECK_EXTENSION(EXT_secondary_color);
1230          return (ctx->Array.ArrayObj->SecondaryColor.Enabled != 0);
1231 #if FEATURE_point_size_array
1232       case GL_POINT_SIZE_ARRAY_OES:
1233          return (ctx->Array.ArrayObj->PointSize.Enabled != 0);
1234 #endif
1235
1236       /* GL_ARB_texture_cube_map */
1237       case GL_TEXTURE_CUBE_MAP_ARB:
1238          CHECK_EXTENSION(ARB_texture_cube_map);
1239          return is_texture_enabled(ctx, TEXTURE_CUBE_BIT);
1240
1241       /* GL_EXT_secondary_color */
1242       case GL_COLOR_SUM_EXT:
1243          CHECK_EXTENSION2(EXT_secondary_color, ARB_vertex_program);
1244          return ctx->Fog.ColorSumEnabled;
1245
1246       /* GL_ARB_multisample */
1247       case GL_MULTISAMPLE_ARB:
1248          return ctx->Multisample.Enabled;
1249       case GL_SAMPLE_ALPHA_TO_COVERAGE_ARB:
1250          return ctx->Multisample.SampleAlphaToCoverage;
1251       case GL_SAMPLE_ALPHA_TO_ONE_ARB:
1252          return ctx->Multisample.SampleAlphaToOne;
1253       case GL_SAMPLE_COVERAGE_ARB:
1254          return ctx->Multisample.SampleCoverage;
1255       case GL_SAMPLE_COVERAGE_INVERT_ARB:
1256          return ctx->Multisample.SampleCoverageInvert;
1257
1258       /* GL_IBM_rasterpos_clip */
1259       case GL_RASTER_POSITION_UNCLIPPED_IBM:
1260          CHECK_EXTENSION(IBM_rasterpos_clip);
1261          return ctx->Transform.RasterPositionUnclipped;
1262
1263       /* GL_NV_point_sprite */
1264       case GL_POINT_SPRITE_NV:
1265          CHECK_EXTENSION2(NV_point_sprite, ARB_point_sprite)
1266          return ctx->Point.PointSprite;
1267
1268 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
1269       case GL_VERTEX_PROGRAM_ARB:
1270          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1271          return ctx->VertexProgram.Enabled;
1272       case GL_VERTEX_PROGRAM_POINT_SIZE_ARB:
1273          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1274          return ctx->VertexProgram.PointSizeEnabled;
1275       case GL_VERTEX_PROGRAM_TWO_SIDE_ARB:
1276          CHECK_EXTENSION2(ARB_vertex_program, NV_vertex_program);
1277          return ctx->VertexProgram.TwoSideEnabled;
1278 #endif
1279 #if FEATURE_NV_vertex_program
1280       case GL_VERTEX_ATTRIB_ARRAY0_NV:
1281       case GL_VERTEX_ATTRIB_ARRAY1_NV:
1282       case GL_VERTEX_ATTRIB_ARRAY2_NV:
1283       case GL_VERTEX_ATTRIB_ARRAY3_NV:
1284       case GL_VERTEX_ATTRIB_ARRAY4_NV:
1285       case GL_VERTEX_ATTRIB_ARRAY5_NV:
1286       case GL_VERTEX_ATTRIB_ARRAY6_NV:
1287       case GL_VERTEX_ATTRIB_ARRAY7_NV:
1288       case GL_VERTEX_ATTRIB_ARRAY8_NV:
1289       case GL_VERTEX_ATTRIB_ARRAY9_NV:
1290       case GL_VERTEX_ATTRIB_ARRAY10_NV:
1291       case GL_VERTEX_ATTRIB_ARRAY11_NV:
1292       case GL_VERTEX_ATTRIB_ARRAY12_NV:
1293       case GL_VERTEX_ATTRIB_ARRAY13_NV:
1294       case GL_VERTEX_ATTRIB_ARRAY14_NV:
1295       case GL_VERTEX_ATTRIB_ARRAY15_NV:
1296          CHECK_EXTENSION(NV_vertex_program);
1297          {
1298             GLint n = (GLint) cap - GL_VERTEX_ATTRIB_ARRAY0_NV;
1299             ASSERT(n < Elements(ctx->Array.ArrayObj->VertexAttrib));
1300             return (ctx->Array.ArrayObj->VertexAttrib[n].Enabled != 0);
1301          }
1302       case GL_MAP1_VERTEX_ATTRIB0_4_NV:
1303       case GL_MAP1_VERTEX_ATTRIB1_4_NV:
1304       case GL_MAP1_VERTEX_ATTRIB2_4_NV:
1305       case GL_MAP1_VERTEX_ATTRIB3_4_NV:
1306       case GL_MAP1_VERTEX_ATTRIB4_4_NV:
1307       case GL_MAP1_VERTEX_ATTRIB5_4_NV:
1308       case GL_MAP1_VERTEX_ATTRIB6_4_NV:
1309       case GL_MAP1_VERTEX_ATTRIB7_4_NV:
1310       case GL_MAP1_VERTEX_ATTRIB8_4_NV:
1311       case GL_MAP1_VERTEX_ATTRIB9_4_NV:
1312       case GL_MAP1_VERTEX_ATTRIB10_4_NV:
1313       case GL_MAP1_VERTEX_ATTRIB11_4_NV:
1314       case GL_MAP1_VERTEX_ATTRIB12_4_NV:
1315       case GL_MAP1_VERTEX_ATTRIB13_4_NV:
1316       case GL_MAP1_VERTEX_ATTRIB14_4_NV:
1317       case GL_MAP1_VERTEX_ATTRIB15_4_NV:
1318          CHECK_EXTENSION(NV_vertex_program);
1319          {
1320             const GLuint map = (GLuint) (cap - GL_MAP1_VERTEX_ATTRIB0_4_NV);
1321             return ctx->Eval.Map1Attrib[map];
1322          }
1323       case GL_MAP2_VERTEX_ATTRIB0_4_NV:
1324       case GL_MAP2_VERTEX_ATTRIB1_4_NV:
1325       case GL_MAP2_VERTEX_ATTRIB2_4_NV:
1326       case GL_MAP2_VERTEX_ATTRIB3_4_NV:
1327       case GL_MAP2_VERTEX_ATTRIB4_4_NV:
1328       case GL_MAP2_VERTEX_ATTRIB5_4_NV:
1329       case GL_MAP2_VERTEX_ATTRIB6_4_NV:
1330       case GL_MAP2_VERTEX_ATTRIB7_4_NV:
1331       case GL_MAP2_VERTEX_ATTRIB8_4_NV:
1332       case GL_MAP2_VERTEX_ATTRIB9_4_NV:
1333       case GL_MAP2_VERTEX_ATTRIB10_4_NV:
1334       case GL_MAP2_VERTEX_ATTRIB11_4_NV:
1335       case GL_MAP2_VERTEX_ATTRIB12_4_NV:
1336       case GL_MAP2_VERTEX_ATTRIB13_4_NV:
1337       case GL_MAP2_VERTEX_ATTRIB14_4_NV:
1338       case GL_MAP2_VERTEX_ATTRIB15_4_NV:
1339          CHECK_EXTENSION(NV_vertex_program);
1340          {
1341             const GLuint map = (GLuint) (cap - GL_MAP2_VERTEX_ATTRIB0_4_NV);
1342             return ctx->Eval.Map2Attrib[map];
1343          }
1344 #endif /* FEATURE_NV_vertex_program */
1345
1346 #if FEATURE_NV_fragment_program
1347       case GL_FRAGMENT_PROGRAM_NV:
1348          CHECK_EXTENSION(NV_fragment_program);
1349          return ctx->FragmentProgram.Enabled;
1350 #endif /* FEATURE_NV_fragment_program */
1351
1352       /* GL_NV_texture_rectangle */
1353       case GL_TEXTURE_RECTANGLE_NV:
1354          CHECK_EXTENSION(NV_texture_rectangle);
1355          return is_texture_enabled(ctx, TEXTURE_RECT_BIT);
1356
1357       /* GL_EXT_stencil_two_side */
1358       case GL_STENCIL_TEST_TWO_SIDE_EXT:
1359          CHECK_EXTENSION(EXT_stencil_two_side);
1360          return ctx->Stencil.TestTwoSide;
1361
1362 #if FEATURE_ARB_fragment_program
1363       case GL_FRAGMENT_PROGRAM_ARB:
1364          return ctx->FragmentProgram.Enabled;
1365 #endif /* FEATURE_ARB_fragment_program */
1366
1367       /* GL_EXT_depth_bounds_test */
1368       case GL_DEPTH_BOUNDS_TEST_EXT:
1369          CHECK_EXTENSION(EXT_depth_bounds_test);
1370          return ctx->Depth.BoundsTest;
1371
1372       /* GL_ARB_depth_clamp */
1373       case GL_DEPTH_CLAMP:
1374          CHECK_EXTENSION(ARB_depth_clamp);
1375          return ctx->Transform.DepthClamp;
1376
1377 #if FEATURE_ATI_fragment_shader
1378       case GL_FRAGMENT_SHADER_ATI:
1379          CHECK_EXTENSION(ATI_fragment_shader);
1380          return ctx->ATIFragmentShader.Enabled;
1381 #endif /* FEATURE_ATI_fragment_shader */
1382
1383       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1384          CHECK_EXTENSION(ARB_seamless_cube_map);
1385          return ctx->Texture.CubeMapSeamless;
1386
1387 #if FEATURE_EXT_transform_feedback
1388       case GL_RASTERIZER_DISCARD:
1389          CHECK_EXTENSION(EXT_transform_feedback);
1390          return ctx->TransformFeedback.RasterDiscard;
1391 #endif
1392
1393       /* GL_NV_primitive_restart */
1394       case GL_PRIMITIVE_RESTART_NV:
1395          if (!ctx->Extensions.NV_primitive_restart) {
1396             goto invalid_enum_error;
1397          }
1398          return ctx->Array.PrimitiveRestart;
1399
1400       /* GL 3.1 primitive restart */
1401       case GL_PRIMITIVE_RESTART:
1402          if (ctx->VersionMajor * 10 + ctx->VersionMinor < 31) {
1403             goto invalid_enum_error;
1404          }
1405          return ctx->Array.PrimitiveRestart;
1406
1407       /* GL3.0 - GL_framebuffer_sRGB */
1408       case GL_FRAMEBUFFER_SRGB_EXT:
1409          CHECK_EXTENSION(EXT_framebuffer_sRGB);
1410          return ctx->Color.sRGBEnabled;
1411
1412       default:
1413          goto invalid_enum_error;
1414    }
1415
1416    return GL_FALSE;
1417
1418 invalid_enum_error:
1419    _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabled(0x%x)", (int) cap);
1420    return GL_FALSE;
1421 }