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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  25  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  26  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  27  * OTHER DEALINGS IN THE SOFTWARE.
  28  */
  29
  30
  31 #include "glheader.h"
  32 #include "clip.h"
  33 #include "context.h"
  34 #include "enable.h"
  35 #include "light.h"
  36 #include "simple_list.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 static void
  52 update_derived_primitive_restart_state(struct gl_context *ctx)
  53 {
  54    /* Update derived primitive restart state.
  55     */
  56    ctx->Array._PrimitiveRestart = ctx->Array.PrimitiveRestart
  57       || ctx->Array.PrimitiveRestartFixedIndex;
  58 }
  59
  60 /**
  61  * Helper to enable/disable client-side state.
  62  */
  63 static void
  64 client_state(struct gl_context *ctx, GLenum cap, GLboolean state)
  65 {
  66    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
  67    GLbitfield64 flag;
  68    GLboolean *var;
  69
  70    switch (cap) {
  71       case GL_VERTEX_ARRAY:
  72          var = &arrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled;
  73          flag = VERT_BIT_POS;
  74          break;
  75       case GL_NORMAL_ARRAY:
  76          var = &arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled;
  77          flag = VERT_BIT_NORMAL;
  78          break;
  79       case GL_COLOR_ARRAY:
  80          var = &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled;
  81          flag = VERT_BIT_COLOR0;
  82          break;
  83       case GL_INDEX_ARRAY:
  84          var = &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled;
  85          flag = VERT_BIT_COLOR_INDEX;
  86          break;
  87       case GL_TEXTURE_COORD_ARRAY:
  88          var = &arrayObj->VertexAttrib[VERT_ATTRIB_TEX(ctx->Array.ActiveTexture)].Enabled;
  89          flag = VERT_BIT_TEX(ctx->Array.ActiveTexture);
  90          break;
  91       case GL_EDGE_FLAG_ARRAY:
  92          var = &arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled;
  93          flag = VERT_BIT_EDGEFLAG;
  94          break;
  95       case GL_FOG_COORDINATE_ARRAY_EXT:
  96          var = &arrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled;
  97          flag = VERT_BIT_FOG;
  98          break;
  99       case GL_SECONDARY_COLOR_ARRAY_EXT:
 100          var = &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled;
 101          flag = VERT_BIT_COLOR1;
 102          break;
 103
 104       case GL_POINT_SIZE_ARRAY_OES:
 105          var = &arrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Enabled;
 106          flag = VERT_BIT_POINT_SIZE;
 107          break;
 108
 109       /* GL_NV_primitive_restart */
 110       case GL_PRIMITIVE_RESTART_NV:
 111          if (!ctx->Extensions.NV_primitive_restart) {
 112             goto invalid_enum_error;
 113          }
 114          var = &ctx->Array.PrimitiveRestart;
 115          flag = 0;
 116          break;
 117
 118       default:
 119          goto invalid_enum_error;
 120    }
 121
 122    if (*var == state)
 123       return;
 124
 125    FLUSH_VERTICES(ctx, _NEW_ARRAY);
 126
 127    _ae_invalidate_state(ctx, _NEW_ARRAY);
 128
 129    *var = state;
 130
 131    update_derived_primitive_restart_state(ctx);
 132
 133    if (state)
 134       arrayObj->_Enabled |= flag;
 135    else
 136       arrayObj->_Enabled &= ~flag;
 137
 138    arrayObj->NewArrays |= flag;
 139
 140    if (ctx->Driver.Enable) {
 141       ctx->Driver.Enable( ctx, cap, state );
 142    }
 143
 144    return;
 145
 146 invalid_enum_error:
 147    _mesa_error(ctx, GL_INVALID_ENUM, "gl%sClientState(%s)",
 148                state ? "Enable" : "Disable", _mesa_lookup_enum_by_nr(cap));
 149 }
 150
 151
 152 /**
 153  * Enable GL capability.
 154  * \param cap  state to enable/disable.
 155  *
 156  * Get's the current context, assures that we're outside glBegin()/glEnd() and
 157  * calls client_state().
 158  */
 159 void GLAPIENTRY
 160 _mesa_EnableClientState( GLenum cap )
 161 {
 162    GET_CURRENT_CONTEXT(ctx);
 163    client_state( ctx, cap, GL_TRUE );
 164 }
 165
 166
 167 /**
 168  * Disable GL capability.
 169  * \param cap  state to enable/disable.
 170  *
 171  * Get's the current context, assures that we're outside glBegin()/glEnd() and
 172  * calls client_state().
 173  */
 174 void GLAPIENTRY
 175 _mesa_DisableClientState( GLenum cap )
 176 {
 177    GET_CURRENT_CONTEXT(ctx);
 178    client_state( ctx, cap, GL_FALSE );
 179 }
 180
 181
 182 #undef CHECK_EXTENSION
 183 #define CHECK_EXTENSION(EXTNAME, CAP)                                   \
 184    if (!ctx->Extensions.EXTNAME) {                                      \
 185       goto invalid_enum_error;                                          \
 186    }
 187
 188 #define CHECK_EXTENSION2(EXT1, EXT2, CAP)                               \
 189    if (!ctx->Extensions.EXT1 && !ctx->Extensions.EXT2) {                \
 190       goto invalid_enum_error;                                          \
 191    }
 192
 193 /**
 194  * Return pointer to current texture unit for setting/getting coordinate
 195  * state.
 196  * Note that we'll set GL_INVALID_OPERATION and return NULL if the active
 197  * texture unit is higher than the number of supported coordinate units.
 198  */
 199 static struct gl_texture_unit *
 200 get_texcoord_unit(struct gl_context *ctx)
 201 {
 202    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 203       _mesa_error(ctx, GL_INVALID_OPERATION, "glEnable/Disable(texcoord unit)");
 204       return NULL;
 205    }
 206    else {
 207       return &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 208    }
 209 }
 210
 211
 212 /**
 213  * Helper function to enable or disable a texture target.
 214  * \param bit  one of the TEXTURE_x_BIT values
 215  * \return GL_TRUE if state is changing or GL_FALSE if no change
 216  */
 217 static GLboolean
 218 enable_texture(struct gl_context *ctx, GLboolean state, GLbitfield texBit)
 219 {
 220    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 221    const GLbitfield newenabled = state
 222       ? (texUnit->Enabled | texBit) : (texUnit->Enabled & ~texBit);
 223
 224    if (texUnit->Enabled == newenabled)
 225        return GL_FALSE;
 226
 227    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 228    texUnit->Enabled = newenabled;
 229    return GL_TRUE;
 230 }
 231
 232
 233 /**
 234  * Helper function to enable or disable GL_MULTISAMPLE, skipping the check for
 235  * whether the API supports it (GLES doesn't).
 236  */
 237 void
 238 _mesa_set_multisample(struct gl_context *ctx, GLboolean state)
 239 {
 240    if (ctx->Multisample.Enabled == state)
 241       return;
 242    FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 243    ctx->Multisample.Enabled = state;
 244
 245    if (ctx->Driver.Enable) {
 246       ctx->Driver.Enable(ctx, GL_MULTISAMPLE, state);
 247    }
 248 }
 249
 250 /**
 251  * Helper function to enable or disable GL_FRAMEBUFFER_SRGB, skipping the
 252  * check for whether the API supports it (GLES doesn't).
 253  */
 254 void
 255 _mesa_set_framebuffer_srgb(struct gl_context *ctx, GLboolean state)
 256 {
 257    if (ctx->Color.sRGBEnabled == state)
 258       return;
 259    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 260    ctx->Color.sRGBEnabled = state;
 261
 262    if (ctx->Driver.Enable) {
 263       ctx->Driver.Enable(ctx, GL_FRAMEBUFFER_SRGB, state);
 264    }
 265 }
 266
 267 /**
 268  * Helper function to enable or disable state.
 269  *
 270  * \param ctx GL context.
 271  * \param cap  the state to enable/disable
 272  * \param state whether to enable or disable the specified capability.
 273  *
 274  * Updates the current context and flushes the vertices as needed. For
 275  * capabilities associated with extensions it verifies that those extensions
 276  * are effectivly present before updating. Notifies the driver via
 277  * dd_function_table::Enable.
 278  */
 279 void
 280 _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
 281 {
 282    if (MESA_VERBOSE & VERBOSE_API)
 283       _mesa_debug(ctx, "%s %s (newstate is %x)\n",
 284                   state ? "glEnable" : "glDisable",
 285                   _mesa_lookup_enum_by_nr(cap),
 286                   ctx->NewState);
 287
 288    switch (cap) {
 289       case GL_ALPHA_TEST:
 290          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 291             goto invalid_enum_error;
 292          if (ctx->Color.AlphaEnabled == state)
 293             return;
 294          FLUSH_VERTICES(ctx, _NEW_COLOR);
 295          ctx->Color.AlphaEnabled = state;
 296          break;
 297       case GL_AUTO_NORMAL:
 298          if (ctx->API != API_OPENGL_COMPAT)
 299             goto invalid_enum_error;
 300          if (ctx->Eval.AutoNormal == state)
 301             return;
 302          FLUSH_VERTICES(ctx, _NEW_EVAL);
 303          ctx->Eval.AutoNormal = state;
 304          break;
 305       case GL_BLEND:
 306          {
 307             GLbitfield newEnabled =
 308                state * ((1 << ctx->Const.MaxDrawBuffers) - 1);
 309             if (newEnabled != ctx->Color.BlendEnabled) {
 310                FLUSH_VERTICES(ctx, _NEW_COLOR);
 311                ctx->Color.BlendEnabled = newEnabled;
 312             }
 313          }
 314          break;
 315       case GL_CLIP_DISTANCE0:
 316       case GL_CLIP_DISTANCE1:
 317       case GL_CLIP_DISTANCE2:
 318       case GL_CLIP_DISTANCE3:
 319       case GL_CLIP_DISTANCE4:
 320       case GL_CLIP_DISTANCE5:
 321       case GL_CLIP_DISTANCE6:
 322       case GL_CLIP_DISTANCE7:
 323          {
 324             const GLuint p = cap - GL_CLIP_DISTANCE0;
 325
 326             if (p >= ctx->Const.MaxClipPlanes)
 327                goto invalid_enum_error;
 328
 329             if ((ctx->Transform.ClipPlanesEnabled & (1 << p))
 330                 == ((GLuint) state << p))
 331                return;
 332
 333             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 334
 335             if (state) {
 336                ctx->Transform.ClipPlanesEnabled |= (1 << p);
 337                _mesa_update_clip_plane(ctx, p);
 338             }
 339             else {
 340                ctx->Transform.ClipPlanesEnabled &= ~(1 << p);
 341             }
 342          }
 343          break;
 344       case GL_COLOR_MATERIAL:
 345          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 346             goto invalid_enum_error;
 347          if (ctx->Light.ColorMaterialEnabled == state)
 348             return;
 349          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 350          FLUSH_CURRENT(ctx, 0);
 351          ctx->Light.ColorMaterialEnabled = state;
 352          if (state) {
 353             _mesa_update_color_material( ctx,
 354                                   ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 355          }
 356          break;
 357       case GL_CULL_FACE:
 358          if (ctx->Polygon.CullFlag == state)
 359             return;
 360          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 361          ctx->Polygon.CullFlag = state;
 362          break;
 363       case GL_DEPTH_TEST:
 364          if (ctx->Depth.Test == state)
 365             return;
 366          FLUSH_VERTICES(ctx, _NEW_DEPTH);
 367          ctx->Depth.Test = state;
 368          break;
 369       case GL_DEBUG_OUTPUT:
 370          if (!_mesa_is_desktop_gl(ctx))
 371             goto invalid_enum_error;
 372          ctx->Debug.DebugOutput = state;
 373          break;
 374       case GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB:
 375          if (!_mesa_is_desktop_gl(ctx))
 376             goto invalid_enum_error;
 377          ctx->Debug.SyncOutput = state;
 378          break;
 379       case GL_DITHER:
 380          if (ctx->Color.DitherFlag == state)
 381             return;
 382          FLUSH_VERTICES(ctx, _NEW_COLOR);
 383          ctx->Color.DitherFlag = state;
 384          break;
 385       case GL_FOG:
 386          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 387             goto invalid_enum_error;
 388          if (ctx->Fog.Enabled == state)
 389             return;
 390          FLUSH_VERTICES(ctx, _NEW_FOG);
 391          ctx->Fog.Enabled = state;
 392          break;
 393       case GL_LIGHT0:
 394       case GL_LIGHT1:
 395       case GL_LIGHT2:
 396       case GL_LIGHT3:
 397       case GL_LIGHT4:
 398       case GL_LIGHT5:
 399       case GL_LIGHT6:
 400       case GL_LIGHT7:
 401          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 402             goto invalid_enum_error;
 403          if (ctx->Light.Light[cap-GL_LIGHT0].Enabled == state)
 404             return;
 405          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 406          ctx->Light.Light[cap-GL_LIGHT0].Enabled = state;
 407          if (state) {
 408             insert_at_tail(&ctx->Light.EnabledList,
 409                            &ctx->Light.Light[cap-GL_LIGHT0]);
 410          }
 411          else {
 412             remove_from_list(&ctx->Light.Light[cap-GL_LIGHT0]);
 413          }
 414          break;
 415       case GL_LIGHTING:
 416          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 417             goto invalid_enum_error;
 418          if (ctx->Light.Enabled == state)
 419             return;
 420          FLUSH_VERTICES(ctx, _NEW_LIGHT);
 421          ctx->Light.Enabled = state;
 422          break;
 423       case GL_LINE_SMOOTH:
 424          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
 425             goto invalid_enum_error;
 426          if (ctx->Line.SmoothFlag == state)
 427             return;
 428          FLUSH_VERTICES(ctx, _NEW_LINE);
 429          ctx->Line.SmoothFlag = state;
 430          break;
 431       case GL_LINE_STIPPLE:
 432          if (ctx->API != API_OPENGL_COMPAT)
 433             goto invalid_enum_error;
 434          if (ctx->Line.StippleFlag == state)
 435             return;
 436          FLUSH_VERTICES(ctx, _NEW_LINE);
 437          ctx->Line.StippleFlag = state;
 438          break;
 439       case GL_INDEX_LOGIC_OP:
 440          if (ctx->API != API_OPENGL_COMPAT)
 441             goto invalid_enum_error;
 442          if (ctx->Color.IndexLogicOpEnabled == state)
 443             return;
 444          FLUSH_VERTICES(ctx, _NEW_COLOR);
 445          ctx->Color.IndexLogicOpEnabled = state;
 446          break;
 447       case GL_COLOR_LOGIC_OP:
 448          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
 449             goto invalid_enum_error;
 450          if (ctx->Color.ColorLogicOpEnabled == state)
 451             return;
 452          FLUSH_VERTICES(ctx, _NEW_COLOR);
 453          ctx->Color.ColorLogicOpEnabled = state;
 454          break;
 455       case GL_MAP1_COLOR_4:
 456          if (ctx->API != API_OPENGL_COMPAT)
 457             goto invalid_enum_error;
 458          if (ctx->Eval.Map1Color4 == state)
 459             return;
 460          FLUSH_VERTICES(ctx, _NEW_EVAL);
 461          ctx->Eval.Map1Color4 = state;
 462          break;
 463       case GL_MAP1_INDEX:
 464          if (ctx->API != API_OPENGL_COMPAT)
 465             goto invalid_enum_error;
 466          if (ctx->Eval.Map1Index == state)
 467             return;
 468          FLUSH_VERTICES(ctx, _NEW_EVAL);
 469          ctx->Eval.Map1Index = state;
 470          break;
 471       case GL_MAP1_NORMAL:
 472          if (ctx->API != API_OPENGL_COMPAT)
 473             goto invalid_enum_error;
 474          if (ctx->Eval.Map1Normal == state)
 475             return;
 476          FLUSH_VERTICES(ctx, _NEW_EVAL);
 477          ctx->Eval.Map1Normal = state;
 478          break;
 479       case GL_MAP1_TEXTURE_COORD_1:
 480          if (ctx->API != API_OPENGL_COMPAT)
 481             goto invalid_enum_error;
 482          if (ctx->Eval.Map1TextureCoord1 == state)
 483             return;
 484          FLUSH_VERTICES(ctx, _NEW_EVAL);
 485          ctx->Eval.Map1TextureCoord1 = state;
 486          break;
 487       case GL_MAP1_TEXTURE_COORD_2:
 488          if (ctx->API != API_OPENGL_COMPAT)
 489             goto invalid_enum_error;
 490          if (ctx->Eval.Map1TextureCoord2 == state)
 491             return;
 492          FLUSH_VERTICES(ctx, _NEW_EVAL);
 493          ctx->Eval.Map1TextureCoord2 = state;
 494          break;
 495       case GL_MAP1_TEXTURE_COORD_3:
 496          if (ctx->API != API_OPENGL_COMPAT)
 497             goto invalid_enum_error;
 498          if (ctx->Eval.Map1TextureCoord3 == state)
 499             return;
 500          FLUSH_VERTICES(ctx, _NEW_EVAL);
 501          ctx->Eval.Map1TextureCoord3 = state;
 502          break;
 503       case GL_MAP1_TEXTURE_COORD_4:
 504          if (ctx->API != API_OPENGL_COMPAT)
 505             goto invalid_enum_error;
 506          if (ctx->Eval.Map1TextureCoord4 == state)
 507             return;
 508          FLUSH_VERTICES(ctx, _NEW_EVAL);
 509          ctx->Eval.Map1TextureCoord4 = state;
 510          break;
 511       case GL_MAP1_VERTEX_3:
 512          if (ctx->API != API_OPENGL_COMPAT)
 513             goto invalid_enum_error;
 514          if (ctx->Eval.Map1Vertex3 == state)
 515             return;
 516          FLUSH_VERTICES(ctx, _NEW_EVAL);
 517          ctx->Eval.Map1Vertex3 = state;
 518          break;
 519       case GL_MAP1_VERTEX_4:
 520          if (ctx->API != API_OPENGL_COMPAT)
 521             goto invalid_enum_error;
 522          if (ctx->Eval.Map1Vertex4 == state)
 523             return;
 524          FLUSH_VERTICES(ctx, _NEW_EVAL);
 525          ctx->Eval.Map1Vertex4 = state;
 526          break;
 527       case GL_MAP2_COLOR_4:
 528          if (ctx->API != API_OPENGL_COMPAT)
 529             goto invalid_enum_error;
 530          if (ctx->Eval.Map2Color4 == state)
 531             return;
 532          FLUSH_VERTICES(ctx, _NEW_EVAL);
 533          ctx->Eval.Map2Color4 = state;
 534          break;
 535       case GL_MAP2_INDEX:
 536          if (ctx->API != API_OPENGL_COMPAT)
 537             goto invalid_enum_error;
 538          if (ctx->Eval.Map2Index == state)
 539             return;
 540          FLUSH_VERTICES(ctx, _NEW_EVAL);
 541          ctx->Eval.Map2Index = state;
 542          break;
 543       case GL_MAP2_NORMAL:
 544          if (ctx->API != API_OPENGL_COMPAT)
 545             goto invalid_enum_error;
 546          if (ctx->Eval.Map2Normal == state)
 547             return;
 548          FLUSH_VERTICES(ctx, _NEW_EVAL);
 549          ctx->Eval.Map2Normal = state;
 550          break;
 551       case GL_MAP2_TEXTURE_COORD_1:
 552          if (ctx->API != API_OPENGL_COMPAT)
 553             goto invalid_enum_error;
 554          if (ctx->Eval.Map2TextureCoord1 == state)
 555             return;
 556          FLUSH_VERTICES(ctx, _NEW_EVAL);
 557          ctx->Eval.Map2TextureCoord1 = state;
 558          break;
 559       case GL_MAP2_TEXTURE_COORD_2:
 560          if (ctx->API != API_OPENGL_COMPAT)
 561             goto invalid_enum_error;
 562          if (ctx->Eval.Map2TextureCoord2 == state)
 563             return;
 564          FLUSH_VERTICES(ctx, _NEW_EVAL);
 565          ctx->Eval.Map2TextureCoord2 = state;
 566          break;
 567       case GL_MAP2_TEXTURE_COORD_3:
 568          if (ctx->API != API_OPENGL_COMPAT)
 569             goto invalid_enum_error;
 570          if (ctx->Eval.Map2TextureCoord3 == state)
 571             return;
 572          FLUSH_VERTICES(ctx, _NEW_EVAL);
 573          ctx->Eval.Map2TextureCoord3 = state;
 574          break;
 575       case GL_MAP2_TEXTURE_COORD_4:
 576          if (ctx->API != API_OPENGL_COMPAT)
 577             goto invalid_enum_error;
 578          if (ctx->Eval.Map2TextureCoord4 == state)
 579             return;
 580          FLUSH_VERTICES(ctx, _NEW_EVAL);
 581          ctx->Eval.Map2TextureCoord4 = state;
 582          break;
 583       case GL_MAP2_VERTEX_3:
 584          if (ctx->API != API_OPENGL_COMPAT)
 585             goto invalid_enum_error;
 586          if (ctx->Eval.Map2Vertex3 == state)
 587             return;
 588          FLUSH_VERTICES(ctx, _NEW_EVAL);
 589          ctx->Eval.Map2Vertex3 = state;
 590          break;
 591       case GL_MAP2_VERTEX_4:
 592          if (ctx->API != API_OPENGL_COMPAT)
 593             goto invalid_enum_error;
 594          if (ctx->Eval.Map2Vertex4 == state)
 595             return;
 596          FLUSH_VERTICES(ctx, _NEW_EVAL);
 597          ctx->Eval.Map2Vertex4 = state;
 598          break;
 599       case GL_NORMALIZE:
 600          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 601             goto invalid_enum_error;
 602          if (ctx->Transform.Normalize == state)
 603             return;
 604          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 605          ctx->Transform.Normalize = state;
 606          break;
 607       case GL_POINT_SMOOTH:
 608          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 609             goto invalid_enum_error;
 610          if (ctx->Point.SmoothFlag == state)
 611             return;
 612          FLUSH_VERTICES(ctx, _NEW_POINT);
 613          ctx->Point.SmoothFlag = state;
 614          break;
 615       case GL_POLYGON_SMOOTH:
 616          if (!_mesa_is_desktop_gl(ctx))
 617             goto invalid_enum_error;
 618          if (ctx->Polygon.SmoothFlag == state)
 619             return;
 620          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 621          ctx->Polygon.SmoothFlag = state;
 622          break;
 623       case GL_POLYGON_STIPPLE:
 624          if (ctx->API != API_OPENGL_COMPAT)
 625             goto invalid_enum_error;
 626          if (ctx->Polygon.StippleFlag == state)
 627             return;
 628          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 629          ctx->Polygon.StippleFlag = state;
 630          break;
 631       case GL_POLYGON_OFFSET_POINT:
 632          if (!_mesa_is_desktop_gl(ctx))
 633             goto invalid_enum_error;
 634          if (ctx->Polygon.OffsetPoint == state)
 635             return;
 636          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 637          ctx->Polygon.OffsetPoint = state;
 638          break;
 639       case GL_POLYGON_OFFSET_LINE:
 640          if (!_mesa_is_desktop_gl(ctx))
 641             goto invalid_enum_error;
 642          if (ctx->Polygon.OffsetLine == state)
 643             return;
 644          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 645          ctx->Polygon.OffsetLine = state;
 646          break;
 647       case GL_POLYGON_OFFSET_FILL:
 648          if (ctx->Polygon.OffsetFill == state)
 649             return;
 650          FLUSH_VERTICES(ctx, _NEW_POLYGON);
 651          ctx->Polygon.OffsetFill = state;
 652          break;
 653       case GL_RESCALE_NORMAL_EXT:
 654          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 655             goto invalid_enum_error;
 656          if (ctx->Transform.RescaleNormals == state)
 657             return;
 658          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 659          ctx->Transform.RescaleNormals = state;
 660          break;
 661       case GL_SCISSOR_TEST:
 662          if (ctx->Scissor.Enabled == state)
 663             return;
 664          FLUSH_VERTICES(ctx, _NEW_SCISSOR);
 665          ctx->Scissor.Enabled = state;
 666          break;
 667       case GL_STENCIL_TEST:
 668          if (ctx->Stencil.Enabled == state)
 669             return;
 670          FLUSH_VERTICES(ctx, _NEW_STENCIL);
 671          ctx->Stencil.Enabled = state;
 672          break;
 673       case GL_TEXTURE_1D:
 674          if (ctx->API != API_OPENGL_COMPAT)
 675             goto invalid_enum_error;
 676          if (!enable_texture(ctx, state, TEXTURE_1D_BIT)) {
 677             return;
 678          }
 679          break;
 680       case GL_TEXTURE_2D:
 681          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 682             goto invalid_enum_error;
 683          if (!enable_texture(ctx, state, TEXTURE_2D_BIT)) {
 684             return;
 685          }
 686          break;
 687       case GL_TEXTURE_3D:
 688          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 689             goto invalid_enum_error;
 690          if (!enable_texture(ctx, state, TEXTURE_3D_BIT)) {
 691             return;
 692          }
 693          break;
 694       case GL_TEXTURE_GEN_S:
 695       case GL_TEXTURE_GEN_T:
 696       case GL_TEXTURE_GEN_R:
 697       case GL_TEXTURE_GEN_Q:
 698          {
 699             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 700
 701             if (ctx->API != API_OPENGL_COMPAT)
 702                goto invalid_enum_error;
 703
 704             if (texUnit) {
 705                GLbitfield coordBit = S_BIT << (cap - GL_TEXTURE_GEN_S);
 706                GLbitfield newenabled = texUnit->TexGenEnabled & ~coordBit;
 707                if (state)
 708                   newenabled |= coordBit;
 709                if (texUnit->TexGenEnabled == newenabled)
 710                   return;
 711                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 712                texUnit->TexGenEnabled = newenabled;
 713             }
 714          }
 715          break;
 716
 717       case GL_TEXTURE_GEN_STR_OES:
 718          /* disable S, T, and R at the same time */
 719          {
 720             struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
 721
 722             if (ctx->API != API_OPENGLES)
 723                goto invalid_enum_error;
 724
 725             if (texUnit) {
 726                GLuint newenabled =
 727                   texUnit->TexGenEnabled & ~STR_BITS;
 728                if (state)
 729                   newenabled |= STR_BITS;
 730                if (texUnit->TexGenEnabled == newenabled)
 731                   return;
 732                FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 733                texUnit->TexGenEnabled = newenabled;
 734             }
 735          }
 736          break;
 737
 738       /* client-side state */
 739       case GL_VERTEX_ARRAY:
 740       case GL_NORMAL_ARRAY:
 741       case GL_COLOR_ARRAY:
 742       case GL_INDEX_ARRAY:
 743       case GL_TEXTURE_COORD_ARRAY:
 744       case GL_EDGE_FLAG_ARRAY:
 745       case GL_FOG_COORDINATE_ARRAY_EXT:
 746       case GL_SECONDARY_COLOR_ARRAY_EXT:
 747       case GL_POINT_SIZE_ARRAY_OES:
 748          client_state( ctx, cap, state );
 749          return;
 750
 751       /* GL_ARB_texture_cube_map */
 752       case GL_TEXTURE_CUBE_MAP_ARB:
 753          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 754             goto invalid_enum_error;
 755          CHECK_EXTENSION(ARB_texture_cube_map, cap);
 756          if (!enable_texture(ctx, state, TEXTURE_CUBE_BIT)) {
 757             return;
 758          }
 759          break;
 760
 761       /* GL_EXT_secondary_color */
 762       case GL_COLOR_SUM_EXT:
 763          if (ctx->API != API_OPENGL_COMPAT)
 764             goto invalid_enum_error;
 765          if (ctx->Fog.ColorSumEnabled == state)
 766             return;
 767          FLUSH_VERTICES(ctx, _NEW_FOG);
 768          ctx->Fog.ColorSumEnabled = state;
 769          break;
 770
 771       /* GL_ARB_multisample */
 772       case GL_MULTISAMPLE_ARB:
 773          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
 774             goto invalid_enum_error;
 775          _mesa_set_multisample(ctx, state);
 776          return;
 777       case GL_SAMPLE_ALPHA_TO_COVERAGE_ARB:
 778          if (ctx->Multisample.SampleAlphaToCoverage == state)
 779             return;
 780          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 781          ctx->Multisample.SampleAlphaToCoverage = state;
 782          break;
 783       case GL_SAMPLE_ALPHA_TO_ONE_ARB:
 784          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
 785             goto invalid_enum_error;
 786          if (ctx->Multisample.SampleAlphaToOne == state)
 787             return;
 788          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 789          ctx->Multisample.SampleAlphaToOne = state;
 790          break;
 791       case GL_SAMPLE_COVERAGE_ARB:
 792          if (ctx->Multisample.SampleCoverage == state)
 793             return;
 794          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 795          ctx->Multisample.SampleCoverage = state;
 796          break;
 797       case GL_SAMPLE_COVERAGE_INVERT_ARB:
 798          if (!_mesa_is_desktop_gl(ctx))
 799             goto invalid_enum_error;
 800          if (ctx->Multisample.SampleCoverageInvert == state)
 801             return;
 802          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 803          ctx->Multisample.SampleCoverageInvert = state;
 804          break;
 805
 806       /* GL_ARB_sample_shading */
 807       case GL_SAMPLE_SHADING:
 808          if (!_mesa_is_desktop_gl(ctx))
 809             goto invalid_enum_error;
 810          CHECK_EXTENSION(ARB_sample_shading, cap);
 811          if (ctx->Multisample.SampleShading == state)
 812             return;
 813          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
 814          ctx->Multisample.SampleShading = state;
 815          break;
 816
 817       /* GL_IBM_rasterpos_clip */
 818       case GL_RASTER_POSITION_UNCLIPPED_IBM:
 819          if (ctx->API != API_OPENGL_COMPAT)
 820             goto invalid_enum_error;
 821          if (ctx->Transform.RasterPositionUnclipped == state)
 822             return;
 823          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 824          ctx->Transform.RasterPositionUnclipped = state;
 825          break;
 826
 827       /* GL_NV_point_sprite */
 828       case GL_POINT_SPRITE_NV:
 829          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 830             goto invalid_enum_error;
 831          CHECK_EXTENSION2(NV_point_sprite, ARB_point_sprite, cap);
 832          if (ctx->Point.PointSprite == state)
 833             return;
 834          FLUSH_VERTICES(ctx, _NEW_POINT);
 835          ctx->Point.PointSprite = state;
 836          break;
 837
 838       case GL_VERTEX_PROGRAM_ARB:
 839          if (ctx->API != API_OPENGL_COMPAT)
 840             goto invalid_enum_error;
 841          CHECK_EXTENSION(ARB_vertex_program, cap);
 842          if (ctx->VertexProgram.Enabled == state)
 843             return;
 844          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 845          ctx->VertexProgram.Enabled = state;
 846          break;
 847       case GL_VERTEX_PROGRAM_POINT_SIZE_ARB:
 848          /* This was added with ARB_vertex_program, but it is also used with
 849           * GLSL vertex shaders on desktop.
 850           */
 851          if (!_mesa_is_desktop_gl(ctx))
 852             goto invalid_enum_error;
 853          CHECK_EXTENSION(ARB_vertex_program, cap);
 854          if (ctx->VertexProgram.PointSizeEnabled == state)
 855             return;
 856          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 857          ctx->VertexProgram.PointSizeEnabled = state;
 858          break;
 859       case GL_VERTEX_PROGRAM_TWO_SIDE_ARB:
 860          if (ctx->API != API_OPENGL_COMPAT)
 861             goto invalid_enum_error;
 862          CHECK_EXTENSION(ARB_vertex_program, cap);
 863          if (ctx->VertexProgram.TwoSideEnabled == state)
 864             return;
 865          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 866          ctx->VertexProgram.TwoSideEnabled = state;
 867          break;
 868
 869       /* GL_NV_texture_rectangle */
 870       case GL_TEXTURE_RECTANGLE_NV:
 871          if (ctx->API != API_OPENGL_COMPAT)
 872             goto invalid_enum_error;
 873          CHECK_EXTENSION(NV_texture_rectangle, cap);
 874          if (!enable_texture(ctx, state, TEXTURE_RECT_BIT)) {
 875             return;
 876          }
 877          break;
 878
 879       /* GL_EXT_stencil_two_side */
 880       case GL_STENCIL_TEST_TWO_SIDE_EXT:
 881          if (ctx->API != API_OPENGL_COMPAT)
 882             goto invalid_enum_error;
 883          CHECK_EXTENSION(EXT_stencil_two_side, cap);
 884          if (ctx->Stencil.TestTwoSide == state)
 885             return;
 886          FLUSH_VERTICES(ctx, _NEW_STENCIL);
 887          ctx->Stencil.TestTwoSide = state;
 888          if (state) {
 889             ctx->Stencil._BackFace = 2;
 890          } else {
 891             ctx->Stencil._BackFace = 1;
 892          }
 893          break;
 894
 895       case GL_FRAGMENT_PROGRAM_ARB:
 896          if (ctx->API != API_OPENGL_COMPAT)
 897             goto invalid_enum_error;
 898          CHECK_EXTENSION(ARB_fragment_program, cap);
 899          if (ctx->FragmentProgram.Enabled == state)
 900             return;
 901          FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 902          ctx->FragmentProgram.Enabled = state;
 903          break;
 904
 905       /* GL_EXT_depth_bounds_test */
 906       case GL_DEPTH_BOUNDS_TEST_EXT:
 907          if (!_mesa_is_desktop_gl(ctx))
 908             goto invalid_enum_error;
 909          CHECK_EXTENSION(EXT_depth_bounds_test, cap);
 910          if (ctx->Depth.BoundsTest == state)
 911             return;
 912          FLUSH_VERTICES(ctx, _NEW_DEPTH);
 913          ctx->Depth.BoundsTest = state;
 914          break;
 915
 916       case GL_DEPTH_CLAMP:
 917          if (!_mesa_is_desktop_gl(ctx))
 918             goto invalid_enum_error;
 919          CHECK_EXTENSION(ARB_depth_clamp, cap);
 920          if (ctx->Transform.DepthClamp == state)
 921             return;
 922          FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 923          ctx->Transform.DepthClamp = state;
 924          break;
 925
 926       case GL_FRAGMENT_SHADER_ATI:
 927          if (ctx->API != API_OPENGL_COMPAT)
 928             goto invalid_enum_error;
 929         CHECK_EXTENSION(ATI_fragment_shader, cap);
 930         if (ctx->ATIFragmentShader.Enabled == state)
 931           return;
 932         FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 933         ctx->ATIFragmentShader.Enabled = state;
 934         break;
 935
 936       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 937          if (!_mesa_is_desktop_gl(ctx))
 938             goto invalid_enum_error;
 939          CHECK_EXTENSION(ARB_seamless_cube_map, cap);
 940          if (ctx->Texture.CubeMapSeamless != state) {
 941             FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 942             ctx->Texture.CubeMapSeamless = state;
 943          }
 944          break;
 945
 946       case GL_RASTERIZER_DISCARD:
 947          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 948             goto invalid_enum_error;
 949          CHECK_EXTENSION(EXT_transform_feedback, cap);
 950          if (ctx->RasterDiscard != state) {
 951             FLUSH_VERTICES(ctx, 0);
 952             ctx->NewDriverState |= ctx->DriverFlags.NewRasterizerDiscard;
 953             ctx->RasterDiscard = state;
 954          }
 955          break;
 956
 957       /* GL 3.1 primitive restart.  Note: this enum is different from
 958        * GL_PRIMITIVE_RESTART_NV (which is client state).
 959        */
 960       case GL_PRIMITIVE_RESTART:
 961          if (!_mesa_is_desktop_gl(ctx) || ctx->Version < 31) {
 962             goto invalid_enum_error;
 963          }
 964          if (ctx->Array.PrimitiveRestart != state) {
 965             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 966             ctx->Array.PrimitiveRestart = state;
 967             update_derived_primitive_restart_state(ctx);
 968          }
 969          break;
 970
 971       case GL_PRIMITIVE_RESTART_FIXED_INDEX:
 972          if (!_mesa_is_gles3(ctx) && !ctx->Extensions.ARB_ES3_compatibility)
 973             goto invalid_enum_error;
 974          if (ctx->Array.PrimitiveRestartFixedIndex != state) {
 975             FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 976             ctx->Array.PrimitiveRestartFixedIndex = state;
 977             update_derived_primitive_restart_state(ctx);
 978          }
 979          break;
 980
 981       /* GL3.0 - GL_framebuffer_sRGB */
 982       case GL_FRAMEBUFFER_SRGB_EXT:
 983          if (!_mesa_is_desktop_gl(ctx))
 984             goto invalid_enum_error;
 985          CHECK_EXTENSION(EXT_framebuffer_sRGB, cap);
 986          _mesa_set_framebuffer_srgb(ctx, state);
 987          return;
 988
 989       /* GL_OES_EGL_image_external */
 990       case GL_TEXTURE_EXTERNAL_OES:
 991          if (!_mesa_is_gles(ctx))
 992             goto invalid_enum_error;
 993          CHECK_EXTENSION(OES_EGL_image_external, cap);
 994          if (!enable_texture(ctx, state, TEXTURE_EXTERNAL_BIT)) {
 995             return;
 996          }
 997          break;
 998
 999       /* ARB_texture_multisample */
1000       case GL_SAMPLE_MASK:
1001          if (!_mesa_is_desktop_gl(ctx))
1002             goto invalid_enum_error;
1003          CHECK_EXTENSION(ARB_texture_multisample, cap);
1004          if (ctx->Multisample.SampleMask == state)
1005             return;
1006          FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
1007          ctx->Multisample.SampleMask = state;
1008          break;
1009
1010       default:
1011          goto invalid_enum_error;
1012    }
1013
1014    if (ctx->Driver.Enable) {
1015       ctx->Driver.Enable( ctx, cap, state );
1016    }
1017
1018    return;
1019
1020 invalid_enum_error:
1021    _mesa_error(ctx, GL_INVALID_ENUM, "gl%s(%s)",
1022                state ? "Enable" : "Disable", _mesa_lookup_enum_by_nr(cap));
1023 }
1024
1025
1026 /**
1027  * Enable GL capability.  Called by glEnable()
1028  * \param cap  state to enable.
1029  */
1030 void GLAPIENTRY
1031 _mesa_Enable( GLenum cap )
1032 {
1033    GET_CURRENT_CONTEXT(ctx);
1034
1035    _mesa_set_enable( ctx, cap, GL_TRUE );
1036 }
1037
1038
1039 /**
1040  * Disable GL capability.  Called by glDisable()
1041  * \param cap  state to disable.
1042  */
1043 void GLAPIENTRY
1044 _mesa_Disable( GLenum cap )
1045 {
1046    GET_CURRENT_CONTEXT(ctx);
1047
1048    _mesa_set_enable( ctx, cap, GL_FALSE );
1049 }
1050
1051
1052
1053 /**
1054  * Enable/disable an indexed state var.
1055  */
1056 void
1057 _mesa_set_enablei(struct gl_context *ctx, GLenum cap,
1058                   GLuint index, GLboolean state)
1059 {
1060    ASSERT(state == 0 || state == 1);
1061    switch (cap) {
1062    case GL_BLEND:
1063       if (!ctx->Extensions.EXT_draw_buffers2) {
1064          goto invalid_enum_error;
1065       }
1066       if (index >= ctx->Const.MaxDrawBuffers) {
1067          _mesa_error(ctx, GL_INVALID_VALUE, "%s(index=%u)",
1068                      state ? "glEnableIndexed" : "glDisableIndexed", index);
1069          return;
1070       }
1071       if (((ctx->Color.BlendEnabled >> index) & 1) != state) {
1072          FLUSH_VERTICES(ctx, _NEW_COLOR);
1073          if (state)
1074             ctx->Color.BlendEnabled |= (1 << index);
1075          else
1076             ctx->Color.BlendEnabled &= ~(1 << index);
1077       }
1078       break;
1079    default:
1080       goto invalid_enum_error;
1081    }
1082    return;
1083
1084 invalid_enum_error:
1085     _mesa_error(ctx, GL_INVALID_ENUM, "%s(cap=%s)",
1086                 state ? "glEnablei" : "glDisablei",
1087                 _mesa_lookup_enum_by_nr(cap));
1088 }
1089
1090
1091 void GLAPIENTRY
1092 _mesa_Disablei( GLenum cap, GLuint index )
1093 {
1094    GET_CURRENT_CONTEXT(ctx);
1095    _mesa_set_enablei(ctx, cap, index, GL_FALSE);
1096 }
1097
1098
1099 void GLAPIENTRY
1100 _mesa_Enablei( GLenum cap, GLuint index )
1101 {
1102    GET_CURRENT_CONTEXT(ctx);
1103    _mesa_set_enablei(ctx, cap, index, GL_TRUE);
1104 }
1105
1106
1107 GLboolean GLAPIENTRY
1108 _mesa_IsEnabledi( GLenum cap, GLuint index )
1109 {
1110    GET_CURRENT_CONTEXT(ctx);
1111    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1112    switch (cap) {
1113    case GL_BLEND:
1114       if (index >= ctx->Const.MaxDrawBuffers) {
1115          _mesa_error(ctx, GL_INVALID_VALUE, "glIsEnabledIndexed(index=%u)",
1116                      index);
1117          return GL_FALSE;
1118       }
1119       return (ctx->Color.BlendEnabled >> index) & 1;
1120    default:
1121       _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabledIndexed(cap=%s)",
1122                   _mesa_lookup_enum_by_nr(cap));
1123       return GL_FALSE;
1124    }
1125 }
1126
1127
1128
1129
1130 #undef CHECK_EXTENSION
1131 #define CHECK_EXTENSION(EXTNAME)                        \
1132    if (!ctx->Extensions.EXTNAME) {                      \
1133       goto invalid_enum_error;                          \
1134    }
1135
1136 #undef CHECK_EXTENSION2
1137 #define CHECK_EXTENSION2(EXT1, EXT2)                            \
1138    if (!ctx->Extensions.EXT1 && !ctx->Extensions.EXT2) {        \
1139       goto invalid_enum_error;                                  \
1140    }
1141
1142
1143 /**
1144  * Helper function to determine whether a texture target is enabled.
1145  */
1146 static GLboolean
1147 is_texture_enabled(struct gl_context *ctx, GLbitfield bit)
1148 {
1149    const struct gl_texture_unit *const texUnit =
1150        &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
1151    return (texUnit->Enabled & bit) ? GL_TRUE : GL_FALSE;
1152 }
1153
1154
1155 /**
1156  * Return simple enable/disable state.
1157  *
1158  * \param cap  state variable to query.
1159  *
1160  * Returns the state of the specified capability from the current GL context.
1161  * For the capabilities associated with extensions verifies that those
1162  * extensions are effectively present before reporting.
1163  */
1164 GLboolean GLAPIENTRY
1165 _mesa_IsEnabled( GLenum cap )
1166 {
1167    GET_CURRENT_CONTEXT(ctx);
1168    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1169
1170    switch (cap) {
1171       case GL_ALPHA_TEST:
1172          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1173             goto invalid_enum_error;
1174          return ctx->Color.AlphaEnabled;
1175       case GL_AUTO_NORMAL:
1176          if (ctx->API != API_OPENGL_COMPAT)
1177             goto invalid_enum_error;
1178          return ctx->Eval.AutoNormal;
1179       case GL_BLEND:
1180          return ctx->Color.BlendEnabled & 1;  /* return state for buffer[0] */
1181       case GL_CLIP_DISTANCE0:
1182       case GL_CLIP_DISTANCE1:
1183       case GL_CLIP_DISTANCE2:
1184       case GL_CLIP_DISTANCE3:
1185       case GL_CLIP_DISTANCE4:
1186       case GL_CLIP_DISTANCE5:
1187       case GL_CLIP_DISTANCE6:
1188       case GL_CLIP_DISTANCE7: {
1189          const GLuint p = cap - GL_CLIP_DISTANCE0;
1190
1191          if (p >= ctx->Const.MaxClipPlanes)
1192             goto invalid_enum_error;
1193
1194          return (ctx->Transform.ClipPlanesEnabled >> p) & 1;
1195       }
1196       case GL_COLOR_MATERIAL:
1197          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1198             goto invalid_enum_error;
1199          return ctx->Light.ColorMaterialEnabled;
1200       case GL_CULL_FACE:
1201          return ctx->Polygon.CullFlag;
1202       case GL_DEBUG_OUTPUT:
1203          if (!_mesa_is_desktop_gl(ctx))
1204             goto invalid_enum_error;
1205          return ctx->Debug.DebugOutput;
1206       case GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB:
1207          if (!_mesa_is_desktop_gl(ctx))
1208             goto invalid_enum_error;
1209          return ctx->Debug.SyncOutput;
1210       case GL_DEPTH_TEST:
1211          return ctx->Depth.Test;
1212       case GL_DITHER:
1213          return ctx->Color.DitherFlag;
1214       case GL_FOG:
1215          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1216             goto invalid_enum_error;
1217          return ctx->Fog.Enabled;
1218       case GL_LIGHTING:
1219          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1220             goto invalid_enum_error;
1221          return ctx->Light.Enabled;
1222       case GL_LIGHT0:
1223       case GL_LIGHT1:
1224       case GL_LIGHT2:
1225       case GL_LIGHT3:
1226       case GL_LIGHT4:
1227       case GL_LIGHT5:
1228       case GL_LIGHT6:
1229       case GL_LIGHT7:
1230          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1231             goto invalid_enum_error;
1232          return ctx->Light.Light[cap-GL_LIGHT0].Enabled;
1233       case GL_LINE_SMOOTH:
1234          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
1235             goto invalid_enum_error;
1236          return ctx->Line.SmoothFlag;
1237       case GL_LINE_STIPPLE:
1238          if (ctx->API != API_OPENGL_COMPAT)
1239             goto invalid_enum_error;
1240          return ctx->Line.StippleFlag;
1241       case GL_INDEX_LOGIC_OP:
1242          if (ctx->API != API_OPENGL_COMPAT)
1243             goto invalid_enum_error;
1244          return ctx->Color.IndexLogicOpEnabled;
1245       case GL_COLOR_LOGIC_OP:
1246          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
1247             goto invalid_enum_error;
1248          return ctx->Color.ColorLogicOpEnabled;
1249       case GL_MAP1_COLOR_4:
1250          if (ctx->API != API_OPENGL_COMPAT)
1251             goto invalid_enum_error;
1252          return ctx->Eval.Map1Color4;
1253       case GL_MAP1_INDEX:
1254          if (ctx->API != API_OPENGL_COMPAT)
1255             goto invalid_enum_error;
1256          return ctx->Eval.Map1Index;
1257       case GL_MAP1_NORMAL:
1258          if (ctx->API != API_OPENGL_COMPAT)
1259             goto invalid_enum_error;
1260          return ctx->Eval.Map1Normal;
1261       case GL_MAP1_TEXTURE_COORD_1:
1262          if (ctx->API != API_OPENGL_COMPAT)
1263             goto invalid_enum_error;
1264          return ctx->Eval.Map1TextureCoord1;
1265       case GL_MAP1_TEXTURE_COORD_2:
1266          if (ctx->API != API_OPENGL_COMPAT)
1267             goto invalid_enum_error;
1268          return ctx->Eval.Map1TextureCoord2;
1269       case GL_MAP1_TEXTURE_COORD_3:
1270          if (ctx->API != API_OPENGL_COMPAT)
1271             goto invalid_enum_error;
1272          return ctx->Eval.Map1TextureCoord3;
1273       case GL_MAP1_TEXTURE_COORD_4:
1274          if (ctx->API != API_OPENGL_COMPAT)
1275             goto invalid_enum_error;
1276          return ctx->Eval.Map1TextureCoord4;
1277       case GL_MAP1_VERTEX_3:
1278          if (ctx->API != API_OPENGL_COMPAT)
1279             goto invalid_enum_error;
1280          return ctx->Eval.Map1Vertex3;
1281       case GL_MAP1_VERTEX_4:
1282          if (ctx->API != API_OPENGL_COMPAT)
1283             goto invalid_enum_error;
1284          return ctx->Eval.Map1Vertex4;
1285       case GL_MAP2_COLOR_4:
1286          if (ctx->API != API_OPENGL_COMPAT)
1287             goto invalid_enum_error;
1288          return ctx->Eval.Map2Color4;
1289       case GL_MAP2_INDEX:
1290          if (ctx->API != API_OPENGL_COMPAT)
1291             goto invalid_enum_error;
1292          return ctx->Eval.Map2Index;
1293       case GL_MAP2_NORMAL:
1294          if (ctx->API != API_OPENGL_COMPAT)
1295             goto invalid_enum_error;
1296          return ctx->Eval.Map2Normal;
1297       case GL_MAP2_TEXTURE_COORD_1:
1298          if (ctx->API != API_OPENGL_COMPAT)
1299             goto invalid_enum_error;
1300          return ctx->Eval.Map2TextureCoord1;
1301       case GL_MAP2_TEXTURE_COORD_2:
1302          if (ctx->API != API_OPENGL_COMPAT)
1303             goto invalid_enum_error;
1304          return ctx->Eval.Map2TextureCoord2;
1305       case GL_MAP2_TEXTURE_COORD_3:
1306          if (ctx->API != API_OPENGL_COMPAT)
1307             goto invalid_enum_error;
1308          return ctx->Eval.Map2TextureCoord3;
1309       case GL_MAP2_TEXTURE_COORD_4:
1310          if (ctx->API != API_OPENGL_COMPAT)
1311             goto invalid_enum_error;
1312          return ctx->Eval.Map2TextureCoord4;
1313       case GL_MAP2_VERTEX_3:
1314          if (ctx->API != API_OPENGL_COMPAT)
1315             goto invalid_enum_error;
1316          return ctx->Eval.Map2Vertex3;
1317       case GL_MAP2_VERTEX_4:
1318          if (ctx->API != API_OPENGL_COMPAT)
1319             goto invalid_enum_error;
1320          return ctx->Eval.Map2Vertex4;
1321       case GL_NORMALIZE:
1322          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1323             goto invalid_enum_error;
1324          return ctx->Transform.Normalize;
1325       case GL_POINT_SMOOTH:
1326          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1327             goto invalid_enum_error;
1328          return ctx->Point.SmoothFlag;
1329       case GL_POLYGON_SMOOTH:
1330          if (!_mesa_is_desktop_gl(ctx))
1331             goto invalid_enum_error;
1332          return ctx->Polygon.SmoothFlag;
1333       case GL_POLYGON_STIPPLE:
1334          if (ctx->API != API_OPENGL_COMPAT)
1335             goto invalid_enum_error;
1336          return ctx->Polygon.StippleFlag;
1337       case GL_POLYGON_OFFSET_POINT:
1338          if (!_mesa_is_desktop_gl(ctx))
1339             goto invalid_enum_error;
1340          return ctx->Polygon.OffsetPoint;
1341       case GL_POLYGON_OFFSET_LINE:
1342          if (!_mesa_is_desktop_gl(ctx))
1343             goto invalid_enum_error;
1344          return ctx->Polygon.OffsetLine;
1345       case GL_POLYGON_OFFSET_FILL:
1346          return ctx->Polygon.OffsetFill;
1347       case GL_RESCALE_NORMAL_EXT:
1348          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1349             goto invalid_enum_error;
1350          return ctx->Transform.RescaleNormals;
1351       case GL_SCISSOR_TEST:
1352          return ctx->Scissor.Enabled;
1353       case GL_STENCIL_TEST:
1354          return ctx->Stencil.Enabled;
1355       case GL_TEXTURE_1D:
1356          if (ctx->API != API_OPENGL_COMPAT)
1357             goto invalid_enum_error;
1358          return is_texture_enabled(ctx, TEXTURE_1D_BIT);
1359       case GL_TEXTURE_2D:
1360          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1361             goto invalid_enum_error;
1362          return is_texture_enabled(ctx, TEXTURE_2D_BIT);
1363       case GL_TEXTURE_3D:
1364          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1365             goto invalid_enum_error;
1366          return is_texture_enabled(ctx, TEXTURE_3D_BIT);
1367       case GL_TEXTURE_GEN_S:
1368       case GL_TEXTURE_GEN_T:
1369       case GL_TEXTURE_GEN_R:
1370       case GL_TEXTURE_GEN_Q:
1371          {
1372             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1373
1374             if (ctx->API != API_OPENGL_COMPAT)
1375                goto invalid_enum_error;
1376
1377             if (texUnit) {
1378                GLbitfield coordBit = S_BIT << (cap - GL_TEXTURE_GEN_S);
1379                return (texUnit->TexGenEnabled & coordBit) ? GL_TRUE : GL_FALSE;
1380             }
1381          }
1382          return GL_FALSE;
1383       case GL_TEXTURE_GEN_STR_OES:
1384          {
1385             const struct gl_texture_unit *texUnit = get_texcoord_unit(ctx);
1386
1387             if (ctx->API != API_OPENGLES)
1388                goto invalid_enum_error;
1389
1390             if (texUnit) {
1391                return (texUnit->TexGenEnabled & STR_BITS) == STR_BITS
1392                   ? GL_TRUE : GL_FALSE;
1393             }
1394          }
1395
1396       /* client-side state */
1397       case GL_VERTEX_ARRAY:
1398          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1399             goto invalid_enum_error;
1400          return ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled;
1401       case GL_NORMAL_ARRAY:
1402          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1403             goto invalid_enum_error;
1404          return ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled;
1405       case GL_COLOR_ARRAY:
1406          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1407             goto invalid_enum_error;
1408          return ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled;
1409       case GL_INDEX_ARRAY:
1410          if (ctx->API != API_OPENGL_COMPAT)
1411             goto invalid_enum_error;
1412          return ctx->Array.ArrayObj->
1413             VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled;
1414       case GL_TEXTURE_COORD_ARRAY:
1415          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1416             goto invalid_enum_error;
1417          return ctx->Array.ArrayObj->
1418             VertexAttrib[VERT_ATTRIB_TEX(ctx->Array.ActiveTexture)].Enabled;
1419       case GL_EDGE_FLAG_ARRAY:
1420          if (ctx->API != API_OPENGL_COMPAT)
1421             goto invalid_enum_error;
1422          return ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled;
1423       case GL_FOG_COORDINATE_ARRAY_EXT:
1424          if (ctx->API != API_OPENGL_COMPAT)
1425             goto invalid_enum_error;
1426          return ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled;
1427       case GL_SECONDARY_COLOR_ARRAY_EXT:
1428          if (ctx->API != API_OPENGL_COMPAT)
1429             goto invalid_enum_error;
1430          return ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled;
1431       case GL_POINT_SIZE_ARRAY_OES:
1432          if (ctx->API != API_OPENGLES)
1433             goto invalid_enum_error;
1434          return ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Enabled;
1435
1436       /* GL_ARB_texture_cube_map */
1437       case GL_TEXTURE_CUBE_MAP_ARB:
1438          CHECK_EXTENSION(ARB_texture_cube_map);
1439          return is_texture_enabled(ctx, TEXTURE_CUBE_BIT);
1440
1441       /* GL_EXT_secondary_color */
1442       case GL_COLOR_SUM_EXT:
1443          if (ctx->API != API_OPENGL_COMPAT)
1444             goto invalid_enum_error;
1445          return ctx->Fog.ColorSumEnabled;
1446
1447       /* GL_ARB_multisample */
1448       case GL_MULTISAMPLE_ARB:
1449          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
1450             goto invalid_enum_error;
1451          return ctx->Multisample.Enabled;
1452       case GL_SAMPLE_ALPHA_TO_COVERAGE_ARB:
1453          return ctx->Multisample.SampleAlphaToCoverage;
1454       case GL_SAMPLE_ALPHA_TO_ONE_ARB:
1455          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
1456             goto invalid_enum_error;
1457          return ctx->Multisample.SampleAlphaToOne;
1458       case GL_SAMPLE_COVERAGE_ARB:
1459          return ctx->Multisample.SampleCoverage;
1460       case GL_SAMPLE_COVERAGE_INVERT_ARB:
1461          if (!_mesa_is_desktop_gl(ctx))
1462             goto invalid_enum_error;
1463          return ctx->Multisample.SampleCoverageInvert;
1464
1465       /* GL_IBM_rasterpos_clip */
1466       case GL_RASTER_POSITION_UNCLIPPED_IBM:
1467          if (ctx->API != API_OPENGL_COMPAT)
1468             goto invalid_enum_error;
1469          return ctx->Transform.RasterPositionUnclipped;
1470
1471       /* GL_NV_point_sprite */
1472       case GL_POINT_SPRITE_NV:
1473          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1474             goto invalid_enum_error;
1475          CHECK_EXTENSION2(NV_point_sprite, ARB_point_sprite)
1476          return ctx->Point.PointSprite;
1477
1478       case GL_VERTEX_PROGRAM_ARB:
1479          if (ctx->API != API_OPENGL_COMPAT)
1480             goto invalid_enum_error;
1481          CHECK_EXTENSION(ARB_vertex_program);
1482          return ctx->VertexProgram.Enabled;
1483       case GL_VERTEX_PROGRAM_POINT_SIZE_ARB:
1484          /* This was added with ARB_vertex_program, but it is also used with
1485           * GLSL vertex shaders on desktop.
1486           */
1487          if (!_mesa_is_desktop_gl(ctx))
1488             goto invalid_enum_error;
1489          CHECK_EXTENSION(ARB_vertex_program);
1490          return ctx->VertexProgram.PointSizeEnabled;
1491       case GL_VERTEX_PROGRAM_TWO_SIDE_ARB:
1492          if (ctx->API != API_OPENGL_COMPAT)
1493             goto invalid_enum_error;
1494          CHECK_EXTENSION(ARB_vertex_program);
1495          return ctx->VertexProgram.TwoSideEnabled;
1496
1497       /* GL_NV_texture_rectangle */
1498       case GL_TEXTURE_RECTANGLE_NV:
1499          if (ctx->API != API_OPENGL_COMPAT)
1500             goto invalid_enum_error;
1501          CHECK_EXTENSION(NV_texture_rectangle);
1502          return is_texture_enabled(ctx, TEXTURE_RECT_BIT);
1503
1504       /* GL_EXT_stencil_two_side */
1505       case GL_STENCIL_TEST_TWO_SIDE_EXT:
1506          if (ctx->API != API_OPENGL_COMPAT)
1507             goto invalid_enum_error;
1508          CHECK_EXTENSION(EXT_stencil_two_side);
1509          return ctx->Stencil.TestTwoSide;
1510
1511       case GL_FRAGMENT_PROGRAM_ARB:
1512          if (ctx->API != API_OPENGL_COMPAT)
1513             goto invalid_enum_error;
1514          return ctx->FragmentProgram.Enabled;
1515
1516       /* GL_EXT_depth_bounds_test */
1517       case GL_DEPTH_BOUNDS_TEST_EXT:
1518          if (!_mesa_is_desktop_gl(ctx))
1519             goto invalid_enum_error;
1520          CHECK_EXTENSION(EXT_depth_bounds_test);
1521          return ctx->Depth.BoundsTest;
1522
1523       /* GL_ARB_depth_clamp */
1524       case GL_DEPTH_CLAMP:
1525          if (!_mesa_is_desktop_gl(ctx))
1526             goto invalid_enum_error;
1527          CHECK_EXTENSION(ARB_depth_clamp);
1528          return ctx->Transform.DepthClamp;
1529
1530       case GL_FRAGMENT_SHADER_ATI:
1531          if (ctx->API != API_OPENGL_COMPAT)
1532             goto invalid_enum_error;
1533          CHECK_EXTENSION(ATI_fragment_shader);
1534          return ctx->ATIFragmentShader.Enabled;
1535
1536       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1537          if (!_mesa_is_desktop_gl(ctx))
1538             goto invalid_enum_error;
1539          CHECK_EXTENSION(ARB_seamless_cube_map);
1540          return ctx->Texture.CubeMapSeamless;
1541
1542       case GL_RASTERIZER_DISCARD:
1543          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1544             goto invalid_enum_error;
1545          CHECK_EXTENSION(EXT_transform_feedback);
1546          return ctx->RasterDiscard;
1547
1548       /* GL_NV_primitive_restart */
1549       case GL_PRIMITIVE_RESTART_NV:
1550          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.NV_primitive_restart) {
1551             goto invalid_enum_error;
1552          }
1553          return ctx->Array.PrimitiveRestart;
1554
1555       /* GL 3.1 primitive restart */
1556       case GL_PRIMITIVE_RESTART:
1557          if (!_mesa_is_desktop_gl(ctx) || ctx->Version < 31) {
1558             goto invalid_enum_error;
1559          }
1560          return ctx->Array.PrimitiveRestart;
1561
1562       case GL_PRIMITIVE_RESTART_FIXED_INDEX:
1563          if (!_mesa_is_gles3(ctx) && !ctx->Extensions.ARB_ES3_compatibility) {
1564             goto invalid_enum_error;
1565          }
1566          return ctx->Array.PrimitiveRestartFixedIndex;
1567
1568       /* GL3.0 - GL_framebuffer_sRGB */
1569       case GL_FRAMEBUFFER_SRGB_EXT:
1570          if (!_mesa_is_desktop_gl(ctx))
1571             goto invalid_enum_error;
1572          CHECK_EXTENSION(EXT_framebuffer_sRGB);
1573          return ctx->Color.sRGBEnabled;
1574
1575       /* GL_OES_EGL_image_external */
1576       case GL_TEXTURE_EXTERNAL_OES:
1577          if (!_mesa_is_gles(ctx))
1578             goto invalid_enum_error;
1579          CHECK_EXTENSION(OES_EGL_image_external);
1580          return is_texture_enabled(ctx, TEXTURE_EXTERNAL_BIT);
1581
1582       /* ARB_texture_multisample */
1583       case GL_SAMPLE_MASK:
1584          if (!_mesa_is_desktop_gl(ctx))
1585             goto invalid_enum_error;
1586          CHECK_EXTENSION(ARB_texture_multisample);
1587          return ctx->Multisample.SampleMask;
1588
1589       /* ARB_sample_shading */
1590       case GL_SAMPLE_SHADING:
1591          if (!_mesa_is_desktop_gl(ctx))
1592             goto invalid_enum_error;
1593          CHECK_EXTENSION(ARB_sample_shading);
1594          return ctx->Multisample.SampleShading;
1595
1596       default:
1597          goto invalid_enum_error;
1598    }
1599
1600    return GL_FALSE;
1601
1602 invalid_enum_error:
1603    _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabled(%s)",
1604                _mesa_lookup_enum_by_nr(cap));
1605    return GL_FALSE;
1606 }