src/mesa/main/texparam.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file texparam.c
  28  *
  29  * glTexParameter-related functions
  30  */
  31
  32 #include <stdbool.h>
  33 #include "main/glheader.h"
  34 #include "main/blend.h"
  35 #include "main/colormac.h"
  36 #include "main/context.h"
  37 #include "main/enums.h"
  38 #include "main/formats.h"
  39 #include "main/glformats.h"
  40 #include "main/macros.h"
  41 #include "main/mtypes.h"
  42 #include "main/state.h"
  43 #include "main/texcompress.h"
  44 #include "main/texobj.h"
  45 #include "main/texparam.h"
  46 #include "main/teximage.h"
  47 #include "main/texstate.h"
  48 #include "program/prog_instruction.h"
  49
  50
  51 /**
  52  * Check if a coordinate wrap mode is supported for the texture target.
  53  * \return GL_TRUE if legal, GL_FALSE otherwise
  54  */
  55 static GLboolean
  56 validate_texture_wrap_mode(struct gl_context * ctx, GLenum target, GLenum wrap)
  57 {
  58    const struct gl_extensions * const e = & ctx->Extensions;
  59    const bool is_desktop_gl = _mesa_is_desktop_gl(ctx);
  60    bool supported;
  61
  62    switch (wrap) {
  63    case GL_CLAMP:
  64       /* GL_CLAMP was removed in the core profile, and it has never existed in
  65        * OpenGL ES.
  66        */
  67       supported = (ctx->API == API_OPENGL_COMPAT)
  68          && (target != GL_TEXTURE_EXTERNAL_OES);
  69       break;
  70
  71    case GL_CLAMP_TO_EDGE:
  72       supported = true;
  73       break;
  74
  75    case GL_CLAMP_TO_BORDER:
  76       supported = is_desktop_gl && e->ARB_texture_border_clamp
  77          && (target != GL_TEXTURE_EXTERNAL_OES);
  78       break;
  79
  80    case GL_REPEAT:
  81    case GL_MIRRORED_REPEAT:
  82       supported = (target != GL_TEXTURE_RECTANGLE_NV)
  83          && (target != GL_TEXTURE_EXTERNAL_OES);
  84       break;
  85
  86    case GL_MIRROR_CLAMP_EXT:
  87    case GL_MIRROR_CLAMP_TO_EDGE_EXT:
  88       supported = is_desktop_gl
  89          && (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)
  90          && (target != GL_TEXTURE_RECTANGLE_NV)
  91          && (target != GL_TEXTURE_EXTERNAL_OES);
  92       break;
  93
  94    case GL_MIRROR_CLAMP_TO_BORDER_EXT:
  95       supported = is_desktop_gl && e->EXT_texture_mirror_clamp
  96          && (target != GL_TEXTURE_RECTANGLE_NV)
  97          && (target != GL_TEXTURE_EXTERNAL_OES);
  98       break;
  99
 100    default:
 101       supported = false;
 102       break;
 103    }
 104
 105    if (!supported)
 106       _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)", wrap );
 107
 108    return supported;
 109 }
 110
 111
 112 /**
 113  * Get current texture object for given target.
 114  * Return NULL if any error (and record the error).
 115  * Note that this is different from _mesa_select_tex_object() in that proxy
 116  * targets are not accepted.
 117  * Only the glGetTexLevelParameter() functions accept proxy targets.
 118  */
 119 static struct gl_texture_object *
 120 get_texobj(struct gl_context *ctx, GLenum target, GLboolean get)
 121 {
 122    struct gl_texture_unit *texUnit;
 123
 124    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
 125       _mesa_error(ctx, GL_INVALID_OPERATION,
 126                   "gl%sTexParameter(current unit)", get ? "Get" : "");
 127       return NULL;
 128    }
 129
 130    texUnit = _mesa_get_current_tex_unit(ctx);
 131
 132    switch (target) {
 133    case GL_TEXTURE_1D:
 134       if (_mesa_is_desktop_gl(ctx))
 135          return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 136       break;
 137    case GL_TEXTURE_2D:
 138       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 139    case GL_TEXTURE_3D:
 140       if (ctx->API != API_OPENGLES)
 141          return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 142       break;
 143    case GL_TEXTURE_CUBE_MAP:
 144       if (ctx->Extensions.ARB_texture_cube_map) {
 145          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 146       }
 147       break;
 148    case GL_TEXTURE_RECTANGLE_NV:
 149       if (_mesa_is_desktop_gl(ctx)
 150           && ctx->Extensions.NV_texture_rectangle) {
 151          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 152       }
 153       break;
 154    case GL_TEXTURE_1D_ARRAY_EXT:
 155       if (_mesa_is_desktop_gl(ctx)
 156           && (ctx->Extensions.MESA_texture_array ||
 157               ctx->Extensions.EXT_texture_array)) {
 158          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 159       }
 160       break;
 161    case GL_TEXTURE_2D_ARRAY_EXT:
 162       if ((_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx))
 163           && (ctx->Extensions.MESA_texture_array ||
 164               ctx->Extensions.EXT_texture_array)) {
 165          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 166       }
 167       break;
 168    case GL_TEXTURE_EXTERNAL_OES:
 169       if (_mesa_is_gles(ctx) && ctx->Extensions.OES_EGL_image_external) {
 170          return texUnit->CurrentTex[TEXTURE_EXTERNAL_INDEX];
 171       }
 172       break;
 173    case GL_TEXTURE_CUBE_MAP_ARRAY:
 174       if (ctx->Extensions.ARB_texture_cube_map_array) {
 175          return texUnit->CurrentTex[TEXTURE_CUBE_ARRAY_INDEX];
 176       }
 177       break;
 178    case GL_TEXTURE_2D_MULTISAMPLE:
 179       if (ctx->Extensions.ARB_texture_multisample) {
 180          return texUnit->CurrentTex[TEXTURE_2D_MULTISAMPLE_INDEX];
 181       }
 182       break;
 183    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 184       if (ctx->Extensions.ARB_texture_multisample) {
 185          return texUnit->CurrentTex[TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX];
 186       }
 187       break;
 188    default:
 189       ;
 190    }
 191
 192    _mesa_error(ctx, GL_INVALID_ENUM,
 193                   "gl%sTexParameter(target)", get ? "Get" : "");
 194    return NULL;
 195 }
 196
 197
 198 /**
 199  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 200  * \return -1 if error.
 201  */
 202 static GLint
 203 comp_to_swizzle(GLenum comp)
 204 {
 205    switch (comp) {
 206    case GL_RED:
 207       return SWIZZLE_X;
 208    case GL_GREEN:
 209       return SWIZZLE_Y;
 210    case GL_BLUE:
 211       return SWIZZLE_Z;
 212    case GL_ALPHA:
 213       return SWIZZLE_W;
 214    case GL_ZERO:
 215       return SWIZZLE_ZERO;
 216    case GL_ONE:
 217       return SWIZZLE_ONE;
 218    default:
 219       return -1;
 220    }
 221 }
 222
 223
 224 static void
 225 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 226 {
 227    ASSERT(comp < 4);
 228    ASSERT(swz <= SWIZZLE_NIL);
 229    {
 230       GLuint mask = 0x7 << (3 * comp);
 231       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 232       *swizzle = s;
 233    }
 234 }
 235
 236
 237 /**
 238  * This is called just prior to changing any texture object state which
 239  * will not effect texture completeness.
 240  */
 241 static inline void
 242 flush(struct gl_context *ctx)
 243 {
 244    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 245 }
 246
 247
 248 /**
 249  * This is called just prior to changing any texture object state which
 250  * can effect texture completeness (texture base level, max level).
 251  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 252  * state flag and then mark the texture object as 'incomplete' so that any
 253  * per-texture derived state gets recomputed.
 254  */
 255 static inline void
 256 incomplete(struct gl_context *ctx, struct gl_texture_object *texObj)
 257 {
 258    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 259    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
 260 }
 261
 262
 263 static GLboolean
 264 target_allows_setting_sampler_parameters(GLenum target)
 265 {
 266    switch (target) {
 267    case GL_TEXTURE_2D_MULTISAMPLE:
 268    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 269       return GL_FALSE;
 270
 271    default:
 272       return GL_TRUE;
 273    }
 274 }
 275
 276
 277 /**
 278  * Set an integer-valued texture parameter
 279  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 280  */
 281 static GLboolean
 282 set_tex_parameteri(struct gl_context *ctx,
 283                    struct gl_texture_object *texObj,
 284                    GLenum pname, const GLint *params)
 285 {
 286    switch (pname) {
 287    case GL_TEXTURE_MIN_FILTER:
 288       if (!target_allows_setting_sampler_parameters(texObj->Target))
 289          goto invalid_operation;
 290
 291       if (texObj->Sampler.MinFilter == params[0])
 292          return GL_FALSE;
 293       switch (params[0]) {
 294       case GL_NEAREST:
 295       case GL_LINEAR:
 296          flush(ctx);
 297          texObj->Sampler.MinFilter = params[0];
 298          return GL_TRUE;
 299       case GL_NEAREST_MIPMAP_NEAREST:
 300       case GL_LINEAR_MIPMAP_NEAREST:
 301       case GL_NEAREST_MIPMAP_LINEAR:
 302       case GL_LINEAR_MIPMAP_LINEAR:
 303          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV &&
 304              texObj->Target != GL_TEXTURE_EXTERNAL_OES) {
 305             flush(ctx);
 306             texObj->Sampler.MinFilter = params[0];
 307             return GL_TRUE;
 308          }
 309          /* fall-through */
 310       default:
 311          goto invalid_param;
 312       }
 313       return GL_FALSE;
 314
 315    case GL_TEXTURE_MAG_FILTER:
 316       if (!target_allows_setting_sampler_parameters(texObj->Target))
 317          goto invalid_operation;
 318
 319       if (texObj->Sampler.MagFilter == params[0])
 320          return GL_FALSE;
 321       switch (params[0]) {
 322       case GL_NEAREST:
 323       case GL_LINEAR:
 324          flush(ctx); /* does not effect completeness */
 325          texObj->Sampler.MagFilter = params[0];
 326          return GL_TRUE;
 327       default:
 328          goto invalid_param;
 329       }
 330       return GL_FALSE;
 331
 332    case GL_TEXTURE_WRAP_S:
 333       if (!target_allows_setting_sampler_parameters(texObj->Target))
 334          goto invalid_operation;
 335
 336       if (texObj->Sampler.WrapS == params[0])
 337          return GL_FALSE;
 338       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 339          flush(ctx);
 340          texObj->Sampler.WrapS = params[0];
 341          return GL_TRUE;
 342       }
 343       return GL_FALSE;
 344
 345    case GL_TEXTURE_WRAP_T:
 346       if (!target_allows_setting_sampler_parameters(texObj->Target))
 347          goto invalid_operation;
 348
 349       if (texObj->Sampler.WrapT == params[0])
 350          return GL_FALSE;
 351       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 352          flush(ctx);
 353          texObj->Sampler.WrapT = params[0];
 354          return GL_TRUE;
 355       }
 356       return GL_FALSE;
 357
 358    case GL_TEXTURE_WRAP_R:
 359       if (!target_allows_setting_sampler_parameters(texObj->Target))
 360          goto invalid_operation;
 361
 362       if (texObj->Sampler.WrapR == params[0])
 363          return GL_FALSE;
 364       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 365          flush(ctx);
 366          texObj->Sampler.WrapR = params[0];
 367          return GL_TRUE;
 368       }
 369       return GL_FALSE;
 370
 371    case GL_TEXTURE_BASE_LEVEL:
 372       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 373          goto invalid_pname;
 374
 375       if (texObj->BaseLevel == params[0])
 376          return GL_FALSE;
 377
 378       if ((texObj->Target == GL_TEXTURE_2D_MULTISAMPLE ||
 379            texObj->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) && params[0] != 0)
 380          goto invalid_operation;
 381
 382       if (params[0] < 0 ||
 383           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 384          _mesa_error(ctx, GL_INVALID_VALUE,
 385                      "glTexParameter(param=%d)", params[0]);
 386          return GL_FALSE;
 387       }
 388       incomplete(ctx, texObj);
 389
 390       /** See note about ARB_texture_storage below */
 391       if (texObj->Immutable)
 392          texObj->BaseLevel = MIN2(texObj->ImmutableLevels - 1, params[0]);
 393       else
 394          texObj->BaseLevel = params[0];
 395
 396       return GL_TRUE;
 397
 398    case GL_TEXTURE_MAX_LEVEL:
 399       if (texObj->MaxLevel == params[0])
 400          return GL_FALSE;
 401
 402       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 403          _mesa_error(ctx, GL_INVALID_VALUE,
 404                      "glTexParameter(param=%d)", params[0]);
 405          return GL_FALSE;
 406       }
 407       incomplete(ctx, texObj);
 408
 409       /** From ARB_texture_storage:
 410        * However, if TEXTURE_IMMUTABLE_FORMAT is TRUE, then level_base is
 411        * clamped to the range [0, <levels> - 1] and level_max is then clamped to
 412        * the range [level_base, <levels> - 1], where <levels> is the parameter
 413        * passed the call to TexStorage* for the texture object.
 414        */
 415       if (texObj->Immutable)
 416           texObj->MaxLevel = CLAMP(params[0], texObj->BaseLevel,
 417                                    texObj->ImmutableLevels - 1);
 418       else
 419          texObj->MaxLevel = params[0];
 420
 421       return GL_TRUE;
 422
 423    case GL_GENERATE_MIPMAP_SGIS:
 424       if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 425          goto invalid_pname;
 426
 427       if (params[0] && texObj->Target == GL_TEXTURE_EXTERNAL_OES)
 428          goto invalid_param;
 429       if (texObj->GenerateMipmap != params[0]) {
 430          /* no flush() */
 431          texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 432          return GL_TRUE;
 433       }
 434       return GL_FALSE;
 435
 436    case GL_TEXTURE_COMPARE_MODE_ARB:
 437       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 438           || _mesa_is_gles3(ctx)) {
 439
 440          if (!target_allows_setting_sampler_parameters(texObj->Target))
 441             goto invalid_operation;
 442
 443          if (texObj->Sampler.CompareMode == params[0])
 444             return GL_FALSE;
 445          if (params[0] == GL_NONE ||
 446              params[0] == GL_COMPARE_R_TO_TEXTURE_ARB) {
 447             flush(ctx);
 448             texObj->Sampler.CompareMode = params[0];
 449             return GL_TRUE;
 450          }
 451          goto invalid_param;
 452       }
 453       goto invalid_pname;
 454
 455    case GL_TEXTURE_COMPARE_FUNC_ARB:
 456       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 457           || _mesa_is_gles3(ctx)) {
 458
 459          if (!target_allows_setting_sampler_parameters(texObj->Target))
 460             goto invalid_operation;
 461
 462          if (texObj->Sampler.CompareFunc == params[0])
 463             return GL_FALSE;
 464          switch (params[0]) {
 465          case GL_LEQUAL:
 466          case GL_GEQUAL:
 467          case GL_EQUAL:
 468          case GL_NOTEQUAL:
 469          case GL_LESS:
 470          case GL_GREATER:
 471          case GL_ALWAYS:
 472          case GL_NEVER:
 473             flush(ctx);
 474             texObj->Sampler.CompareFunc = params[0];
 475             return GL_TRUE;
 476          default:
 477             goto invalid_param;
 478          }
 479       }
 480       goto invalid_pname;
 481
 482    case GL_DEPTH_TEXTURE_MODE_ARB:
 483       /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has never
 484        * existed in OpenGL ES.
 485        */
 486       if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.ARB_depth_texture) {
 487          if (texObj->DepthMode == params[0])
 488             return GL_FALSE;
 489          if (params[0] == GL_LUMINANCE ||
 490              params[0] == GL_INTENSITY ||
 491              params[0] == GL_ALPHA ||
 492              (ctx->Extensions.ARB_texture_rg && params[0] == GL_RED)) {
 493             flush(ctx);
 494             texObj->DepthMode = params[0];
 495             return GL_TRUE;
 496          }
 497          goto invalid_param;
 498       }
 499       goto invalid_pname;
 500
 501    case GL_TEXTURE_CROP_RECT_OES:
 502       if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
 503          goto invalid_pname;
 504
 505       texObj->CropRect[0] = params[0];
 506       texObj->CropRect[1] = params[1];
 507       texObj->CropRect[2] = params[2];
 508       texObj->CropRect[3] = params[3];
 509       return GL_TRUE;
 510
 511    case GL_TEXTURE_SWIZZLE_R_EXT:
 512    case GL_TEXTURE_SWIZZLE_G_EXT:
 513    case GL_TEXTURE_SWIZZLE_B_EXT:
 514    case GL_TEXTURE_SWIZZLE_A_EXT:
 515       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 516           || _mesa_is_gles3(ctx)) {
 517          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 518          const GLint swz = comp_to_swizzle(params[0]);
 519          if (swz < 0) {
 520             _mesa_error(ctx, GL_INVALID_OPERATION,
 521                         "glTexParameter(swizzle 0x%x)", params[0]);
 522             return GL_FALSE;
 523          }
 524          ASSERT(comp < 4);
 525
 526          flush(ctx);
 527          texObj->Swizzle[comp] = params[0];
 528          set_swizzle_component(&texObj->_Swizzle, comp, swz);
 529          return GL_TRUE;
 530       }
 531       goto invalid_pname;
 532
 533    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 534       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 535           || _mesa_is_gles3(ctx)) {
 536          GLuint comp;
 537          flush(ctx);
 538          for (comp = 0; comp < 4; comp++) {
 539             const GLint swz = comp_to_swizzle(params[comp]);
 540             if (swz >= 0) {
 541                texObj->Swizzle[comp] = params[comp];
 542                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 543             }
 544             else {
 545                _mesa_error(ctx, GL_INVALID_OPERATION,
 546                            "glTexParameter(swizzle 0x%x)", params[comp]);
 547                return GL_FALSE;
 548             }
 549          }
 550          return GL_TRUE;
 551       }
 552       goto invalid_pname;
 553
 554    case GL_TEXTURE_SRGB_DECODE_EXT:
 555       if (_mesa_is_desktop_gl(ctx)
 556           && ctx->Extensions.EXT_texture_sRGB_decode) {
 557          GLenum decode = params[0];
 558
 559          if (!target_allows_setting_sampler_parameters(texObj->Target))
 560             goto invalid_operation;
 561
 562          if (decode == GL_DECODE_EXT || decode == GL_SKIP_DECODE_EXT) {
 563             if (texObj->Sampler.sRGBDecode != decode) {
 564                flush(ctx);
 565                texObj->Sampler.sRGBDecode = decode;
 566             }
 567             return GL_TRUE;
 568          }
 569       }
 570       goto invalid_pname;
 571
 572    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 573       if (_mesa_is_desktop_gl(ctx)
 574           && ctx->Extensions.AMD_seamless_cubemap_per_texture) {
 575          GLenum param = params[0];
 576
 577          if (!target_allows_setting_sampler_parameters(texObj->Target))
 578             goto invalid_operation;
 579
 580          if (param != GL_TRUE && param != GL_FALSE) {
 581             goto invalid_param;
 582          }
 583          if (param != texObj->Sampler.CubeMapSeamless) {
 584             flush(ctx);
 585             texObj->Sampler.CubeMapSeamless = param;
 586          }
 587          return GL_TRUE;
 588       }
 589       goto invalid_pname;
 590
 591    default:
 592       goto invalid_pname;
 593    }
 594
 595 invalid_pname:
 596    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 597                _mesa_lookup_enum_by_nr(pname));
 598    return GL_FALSE;
 599
 600 invalid_param:
 601    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param=%s)",
 602                _mesa_lookup_enum_by_nr(params[0]));
 603    return GL_FALSE;
 604
 605 invalid_operation:
 606    _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(pname=%s)",
 607                _mesa_lookup_enum_by_nr(pname));
 608    return GL_FALSE;
 609 }
 610
 611
 612 /**
 613  * Set a float-valued texture parameter
 614  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 615  */
 616 static GLboolean
 617 set_tex_parameterf(struct gl_context *ctx,
 618                    struct gl_texture_object *texObj,
 619                    GLenum pname, const GLfloat *params)
 620 {
 621    switch (pname) {
 622    case GL_TEXTURE_MIN_LOD:
 623       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 624          goto invalid_pname;
 625
 626       if (!target_allows_setting_sampler_parameters(texObj->Target))
 627          goto invalid_operation;
 628
 629       if (texObj->Sampler.MinLod == params[0])
 630          return GL_FALSE;
 631       flush(ctx);
 632       texObj->Sampler.MinLod = params[0];
 633       return GL_TRUE;
 634
 635    case GL_TEXTURE_MAX_LOD:
 636       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 637          goto invalid_pname;
 638
 639       if (!target_allows_setting_sampler_parameters(texObj->Target))
 640          goto invalid_operation;
 641
 642       if (texObj->Sampler.MaxLod == params[0])
 643          return GL_FALSE;
 644       flush(ctx);
 645       texObj->Sampler.MaxLod = params[0];
 646       return GL_TRUE;
 647
 648    case GL_TEXTURE_PRIORITY:
 649       if (ctx->API != API_OPENGL_COMPAT)
 650          goto invalid_pname;
 651
 652       flush(ctx);
 653       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 654       return GL_TRUE;
 655
 656    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 657       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 658          if (!target_allows_setting_sampler_parameters(texObj->Target))
 659             goto invalid_operation;
 660
 661          if (texObj->Sampler.MaxAnisotropy == params[0])
 662             return GL_FALSE;
 663          if (params[0] < 1.0) {
 664             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 665             return GL_FALSE;
 666          }
 667          flush(ctx);
 668          /* clamp to max, that's what NVIDIA does */
 669          texObj->Sampler.MaxAnisotropy = MIN2(params[0],
 670                                       ctx->Const.MaxTextureMaxAnisotropy);
 671          return GL_TRUE;
 672       }
 673       else {
 674          static GLuint count = 0;
 675          if (count++ < 10)
 676             goto invalid_pname;
 677       }
 678       return GL_FALSE;
 679
 680    case GL_TEXTURE_LOD_BIAS:
 681       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias.
 682        * It was removed in core-profile, and it has never existed in OpenGL
 683        * ES.
 684        */
 685       if (ctx->API != API_OPENGL_COMPAT)
 686          goto invalid_pname;
 687
 688       if (!target_allows_setting_sampler_parameters(texObj->Target))
 689          goto invalid_operation;
 690
 691       if (texObj->Sampler.LodBias != params[0]) {
 692          flush(ctx);
 693          texObj->Sampler.LodBias = params[0];
 694          return GL_TRUE;
 695       }
 696       break;
 697
 698    case GL_TEXTURE_BORDER_COLOR:
 699       if (!_mesa_is_desktop_gl(ctx))
 700          goto invalid_pname;
 701
 702       if (!target_allows_setting_sampler_parameters(texObj->Target))
 703          goto invalid_operation;
 704
 705       flush(ctx);
 706       /* ARB_texture_float disables clamping */
 707       if (ctx->Extensions.ARB_texture_float) {
 708          texObj->Sampler.BorderColor.f[RCOMP] = params[0];
 709          texObj->Sampler.BorderColor.f[GCOMP] = params[1];
 710          texObj->Sampler.BorderColor.f[BCOMP] = params[2];
 711          texObj->Sampler.BorderColor.f[ACOMP] = params[3];
 712       } else {
 713          texObj->Sampler.BorderColor.f[RCOMP] = CLAMP(params[0], 0.0F, 1.0F);
 714          texObj->Sampler.BorderColor.f[GCOMP] = CLAMP(params[1], 0.0F, 1.0F);
 715          texObj->Sampler.BorderColor.f[BCOMP] = CLAMP(params[2], 0.0F, 1.0F);
 716          texObj->Sampler.BorderColor.f[ACOMP] = CLAMP(params[3], 0.0F, 1.0F);
 717       }
 718       return GL_TRUE;
 719
 720    default:
 721       goto invalid_pname;
 722    }
 723    return GL_FALSE;
 724
 725 invalid_pname:
 726    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 727                _mesa_lookup_enum_by_nr(pname));
 728    return GL_FALSE;
 729
 730 invalid_operation:
 731    _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(pname=%s)",
 732                _mesa_lookup_enum_by_nr(pname));
 733    return GL_FALSE;
 734 }
 735
 736
 737 void GLAPIENTRY
 738 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 739 {
 740    GLboolean need_update;
 741    struct gl_texture_object *texObj;
 742    GET_CURRENT_CONTEXT(ctx);
 743
 744    texObj = get_texobj(ctx, target, GL_FALSE);
 745    if (!texObj)
 746       return;
 747
 748    switch (pname) {
 749    case GL_TEXTURE_MIN_FILTER:
 750    case GL_TEXTURE_MAG_FILTER:
 751    case GL_TEXTURE_WRAP_S:
 752    case GL_TEXTURE_WRAP_T:
 753    case GL_TEXTURE_WRAP_R:
 754    case GL_TEXTURE_BASE_LEVEL:
 755    case GL_TEXTURE_MAX_LEVEL:
 756    case GL_GENERATE_MIPMAP_SGIS:
 757    case GL_TEXTURE_COMPARE_MODE_ARB:
 758    case GL_TEXTURE_COMPARE_FUNC_ARB:
 759    case GL_DEPTH_TEXTURE_MODE_ARB:
 760    case GL_TEXTURE_SRGB_DECODE_EXT:
 761    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 762    case GL_TEXTURE_SWIZZLE_R_EXT:
 763    case GL_TEXTURE_SWIZZLE_G_EXT:
 764    case GL_TEXTURE_SWIZZLE_B_EXT:
 765    case GL_TEXTURE_SWIZZLE_A_EXT:
 766       {
 767          GLint p[4];
 768          p[0] = (param > 0) ?
 769                 ((param > INT_MAX) ? INT_MAX : (GLint) (param + 0.5)) :
 770                 ((param < INT_MIN) ? INT_MIN : (GLint) (param - 0.5));
 771
 772          p[1] = p[2] = p[3] = 0;
 773          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 774       }
 775       break;
 776    default:
 777       {
 778          /* this will generate an error if pname is illegal */
 779          GLfloat p[4];
 780          p[0] = param;
 781          p[1] = p[2] = p[3] = 0.0F;
 782          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 783       }
 784    }
 785
 786    if (ctx->Driver.TexParameter && need_update) {
 787       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 788    }
 789 }
 790
 791
 792 void GLAPIENTRY
 793 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 794 {
 795    GLboolean need_update;
 796    struct gl_texture_object *texObj;
 797    GET_CURRENT_CONTEXT(ctx);
 798
 799    texObj = get_texobj(ctx, target, GL_FALSE);
 800    if (!texObj)
 801       return;
 802
 803    switch (pname) {
 804    case GL_TEXTURE_MIN_FILTER:
 805    case GL_TEXTURE_MAG_FILTER:
 806    case GL_TEXTURE_WRAP_S:
 807    case GL_TEXTURE_WRAP_T:
 808    case GL_TEXTURE_WRAP_R:
 809    case GL_TEXTURE_BASE_LEVEL:
 810    case GL_TEXTURE_MAX_LEVEL:
 811    case GL_GENERATE_MIPMAP_SGIS:
 812    case GL_TEXTURE_COMPARE_MODE_ARB:
 813    case GL_TEXTURE_COMPARE_FUNC_ARB:
 814    case GL_DEPTH_TEXTURE_MODE_ARB:
 815    case GL_TEXTURE_SRGB_DECODE_EXT:
 816    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 817       {
 818          /* convert float param to int */
 819          GLint p[4];
 820          p[0] = (GLint) params[0];
 821          p[1] = p[2] = p[3] = 0;
 822          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 823       }
 824       break;
 825    case GL_TEXTURE_CROP_RECT_OES:
 826       {
 827          /* convert float params to int */
 828          GLint iparams[4];
 829          iparams[0] = (GLint) params[0];
 830          iparams[1] = (GLint) params[1];
 831          iparams[2] = (GLint) params[2];
 832          iparams[3] = (GLint) params[3];
 833          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 834       }
 835       break;
 836    case GL_TEXTURE_SWIZZLE_R_EXT:
 837    case GL_TEXTURE_SWIZZLE_G_EXT:
 838    case GL_TEXTURE_SWIZZLE_B_EXT:
 839    case GL_TEXTURE_SWIZZLE_A_EXT:
 840    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 841       {
 842          GLint p[4] = {0, 0, 0, 0};
 843          p[0] = (GLint) params[0];
 844          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT) {
 845             p[1] = (GLint) params[1];
 846             p[2] = (GLint) params[2];
 847             p[3] = (GLint) params[3];
 848          }
 849          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 850       }
 851       break;
 852    default:
 853       /* this will generate an error if pname is illegal */
 854       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 855    }
 856
 857    if (ctx->Driver.TexParameter && need_update) {
 858       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 859    }
 860 }
 861
 862
 863 void GLAPIENTRY
 864 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 865 {
 866    GLboolean need_update;
 867    struct gl_texture_object *texObj;
 868    GET_CURRENT_CONTEXT(ctx);
 869
 870    texObj = get_texobj(ctx, target, GL_FALSE);
 871    if (!texObj)
 872       return;
 873
 874    switch (pname) {
 875    case GL_TEXTURE_MIN_LOD:
 876    case GL_TEXTURE_MAX_LOD:
 877    case GL_TEXTURE_PRIORITY:
 878    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 879    case GL_TEXTURE_LOD_BIAS:
 880    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 881       {
 882          GLfloat fparam[4];
 883          fparam[0] = (GLfloat) param;
 884          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 885          /* convert int param to float */
 886          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 887       }
 888       break;
 889    default:
 890       /* this will generate an error if pname is illegal */
 891       {
 892          GLint iparam[4];
 893          iparam[0] = param;
 894          iparam[1] = iparam[2] = iparam[3] = 0;
 895          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 896       }
 897    }
 898
 899    if (ctx->Driver.TexParameter && need_update) {
 900       GLfloat fparam = (GLfloat) param;
 901       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 902    }
 903 }
 904
 905
 906 void GLAPIENTRY
 907 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 908 {
 909    GLboolean need_update;
 910    struct gl_texture_object *texObj;
 911    GET_CURRENT_CONTEXT(ctx);
 912
 913    texObj = get_texobj(ctx, target, GL_FALSE);
 914    if (!texObj)
 915       return;
 916
 917    switch (pname) {
 918    case GL_TEXTURE_BORDER_COLOR:
 919       {
 920          /* convert int params to float */
 921          GLfloat fparams[4];
 922          fparams[0] = INT_TO_FLOAT(params[0]);
 923          fparams[1] = INT_TO_FLOAT(params[1]);
 924          fparams[2] = INT_TO_FLOAT(params[2]);
 925          fparams[3] = INT_TO_FLOAT(params[3]);
 926          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 927       }
 928       break;
 929    case GL_TEXTURE_MIN_LOD:
 930    case GL_TEXTURE_MAX_LOD:
 931    case GL_TEXTURE_PRIORITY:
 932    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 933    case GL_TEXTURE_LOD_BIAS:
 934    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 935       {
 936          /* convert int param to float */
 937          GLfloat fparams[4];
 938          fparams[0] = (GLfloat) params[0];
 939          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 940          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 941       }
 942       break;
 943    default:
 944       /* this will generate an error if pname is illegal */
 945       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 946    }
 947
 948    if (ctx->Driver.TexParameter && need_update) {
 949       GLfloat fparams[4];
 950       fparams[0] = INT_TO_FLOAT(params[0]);
 951       if (pname == GL_TEXTURE_BORDER_COLOR ||
 952           pname == GL_TEXTURE_CROP_RECT_OES) {
 953          fparams[1] = INT_TO_FLOAT(params[1]);
 954          fparams[2] = INT_TO_FLOAT(params[2]);
 955          fparams[3] = INT_TO_FLOAT(params[3]);
 956       }
 957       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 958    }
 959 }
 960
 961
 962 /**
 963  * Set tex parameter to integer value(s).  Primarily intended to set
 964  * integer-valued texture border color (for integer-valued textures).
 965  * New in GL 3.0.
 966  */
 967 void GLAPIENTRY
 968 _mesa_TexParameterIiv(GLenum target, GLenum pname, const GLint *params)
 969 {
 970    struct gl_texture_object *texObj;
 971    GET_CURRENT_CONTEXT(ctx);
 972
 973    texObj = get_texobj(ctx, target, GL_FALSE);
 974    if (!texObj)
 975       return;
 976
 977    switch (pname) {
 978    case GL_TEXTURE_BORDER_COLOR:
 979       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 980       /* set the integer-valued border color */
 981       COPY_4V(texObj->Sampler.BorderColor.i, params);
 982       break;
 983    default:
 984       _mesa_TexParameteriv(target, pname, params);
 985       break;
 986    }
 987    /* XXX no driver hook for TexParameterIiv() yet */
 988 }
 989
 990
 991 /**
 992  * Set tex parameter to unsigned integer value(s).  Primarily intended to set
 993  * uint-valued texture border color (for integer-valued textures).
 994  * New in GL 3.0
 995  */
 996 void GLAPIENTRY
 997 _mesa_TexParameterIuiv(GLenum target, GLenum pname, const GLuint *params)
 998 {
 999    struct gl_texture_object *texObj;
1000    GET_CURRENT_CONTEXT(ctx);
1001
1002    texObj = get_texobj(ctx, target, GL_FALSE);
1003    if (!texObj)
1004       return;
1005
1006    switch (pname) {
1007    case GL_TEXTURE_BORDER_COLOR:
1008       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
1009       /* set the unsigned integer-valued border color */
1010       COPY_4V(texObj->Sampler.BorderColor.ui, params);
1011       break;
1012    default:
1013       _mesa_TexParameteriv(target, pname, (const GLint *) params);
1014       break;
1015    }
1016    /* XXX no driver hook for TexParameterIuiv() yet */
1017 }
1018
1019
1020 static GLboolean
1021 legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target)
1022 {
1023    switch (target) {
1024    case GL_TEXTURE_1D:
1025    case GL_PROXY_TEXTURE_1D:
1026    case GL_TEXTURE_2D:
1027    case GL_PROXY_TEXTURE_2D:
1028    case GL_TEXTURE_3D:
1029    case GL_PROXY_TEXTURE_3D:
1030       return GL_TRUE;
1031    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
1032    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
1033    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
1034    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
1035    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
1036    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
1037    case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
1038       return ctx->Extensions.ARB_texture_cube_map;
1039    case GL_TEXTURE_RECTANGLE_NV:
1040    case GL_PROXY_TEXTURE_RECTANGLE_NV:
1041       return ctx->Extensions.NV_texture_rectangle;
1042    case GL_TEXTURE_1D_ARRAY_EXT:
1043    case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
1044    case GL_TEXTURE_2D_ARRAY_EXT:
1045    case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
1046       return (ctx->Extensions.MESA_texture_array ||
1047               ctx->Extensions.EXT_texture_array);
1048    case GL_TEXTURE_BUFFER:
1049       /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
1050        * but not in earlier versions that expose ARB_texture_buffer_object.
1051        *
1052        * From the ARB_texture_buffer_object spec:
1053        * "(7) Do buffer textures support texture parameters (TexParameter) or
1054        *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
1055        *
1056        *    RESOLVED:  No. [...] Note that the spec edits above don't add
1057        *    explicit error language for any of these cases.  That is because
1058        *    each of the functions enumerate the set of valid <target>
1059        *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
1060        *    these cases means that target is not legal, and an INVALID_ENUM
1061        *    error should be generated."
1062        *
1063        * From the OpenGL 3.1 spec:
1064        * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
1065        */
1066       return ctx->API == API_OPENGL_CORE && ctx->Version >= 31;
1067    case GL_TEXTURE_2D_MULTISAMPLE:
1068    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
1069    case GL_PROXY_TEXTURE_2D_MULTISAMPLE:
1070    case GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY:
1071       return ctx->Extensions.ARB_texture_multisample;
1072    default:
1073       return GL_FALSE;
1074    }
1075 }
1076
1077
1078 static void
1079 get_tex_level_parameter_image(struct gl_context *ctx,
1080                               const struct gl_texture_object *texObj,
1081                               GLenum target, GLint level,
1082                               GLenum pname, GLint *params)
1083 {
1084    const struct gl_texture_image *img = NULL;
1085    gl_format texFormat;
1086
1087    img = _mesa_select_tex_image(ctx, texObj, target, level);
1088    if (!img || img->TexFormat == MESA_FORMAT_NONE) {
1089       /* undefined texture image */
1090       if (pname == GL_TEXTURE_COMPONENTS)
1091          *params = 1;
1092       else
1093          *params = 0;
1094       return;
1095    }
1096
1097    texFormat = img->TexFormat;
1098
1099    switch (pname) {
1100       case GL_TEXTURE_WIDTH:
1101          *params = img->Width;
1102          break;
1103       case GL_TEXTURE_HEIGHT:
1104          *params = img->Height;
1105          break;
1106       case GL_TEXTURE_DEPTH:
1107          *params = img->Depth;
1108          break;
1109       case GL_TEXTURE_INTERNAL_FORMAT:
1110          if (_mesa_is_format_compressed(texFormat)) {
1111             /* need to return the actual compressed format */
1112             *params = _mesa_compressed_format_to_glenum(ctx, texFormat);
1113          }
1114          else {
1115             /* If the true internal format is not compressed but the user
1116              * requested a generic compressed format, we have to return the
1117              * generic base format that matches.
1118              *
1119              * From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
1120              *
1121              *     "If no specific compressed format is available,
1122              *     internalformat is instead replaced by the corresponding base
1123              *     internal format."
1124              *
1125              * Otherwise just return the user's requested internal format
1126              */
1127             const GLenum f =
1128                _mesa_gl_compressed_format_base_format(img->InternalFormat);
1129
1130             *params = (f != 0) ? f : img->InternalFormat;
1131          }
1132          break;
1133       case GL_TEXTURE_BORDER:
1134          *params = img->Border;
1135          break;
1136       case GL_TEXTURE_RED_SIZE:
1137       case GL_TEXTURE_GREEN_SIZE:
1138       case GL_TEXTURE_BLUE_SIZE:
1139       case GL_TEXTURE_ALPHA_SIZE:
1140          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1141             *params = _mesa_get_format_bits(texFormat, pname);
1142          else
1143             *params = 0;
1144          break;
1145       case GL_TEXTURE_INTENSITY_SIZE:
1146       case GL_TEXTURE_LUMINANCE_SIZE:
1147          if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
1148             *params = _mesa_get_format_bits(texFormat, pname);
1149             if (*params == 0) {
1150                /* intensity or luminance is probably stored as RGB[A] */
1151                *params = MIN2(_mesa_get_format_bits(texFormat,
1152                                                     GL_TEXTURE_RED_SIZE),
1153                               _mesa_get_format_bits(texFormat,
1154                                                     GL_TEXTURE_GREEN_SIZE));
1155             }
1156          }
1157          else {
1158             *params = 0;
1159          }
1160          break;
1161       case GL_TEXTURE_DEPTH_SIZE_ARB:
1162          if (!ctx->Extensions.ARB_depth_texture)
1163             goto invalid_pname;
1164          *params = _mesa_get_format_bits(texFormat, pname);
1165          break;
1166       case GL_TEXTURE_STENCIL_SIZE_EXT:
1167          if (!ctx->Extensions.EXT_packed_depth_stencil &&
1168              !ctx->Extensions.ARB_framebuffer_object)
1169             goto invalid_pname;
1170          *params = _mesa_get_format_bits(texFormat, pname);
1171          break;
1172       case GL_TEXTURE_SHARED_SIZE:
1173          if (ctx->Version < 30 &&
1174              !ctx->Extensions.EXT_texture_shared_exponent)
1175             goto invalid_pname;
1176          *params = texFormat == MESA_FORMAT_RGB9_E5_FLOAT ? 5 : 0;
1177          break;
1178
1179       /* GL_ARB_texture_compression */
1180       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1181          if (_mesa_is_format_compressed(texFormat) &&
1182              !_mesa_is_proxy_texture(target)) {
1183             *params = _mesa_format_image_size(texFormat, img->Width,
1184                                               img->Height, img->Depth);
1185          }
1186          else {
1187             _mesa_error(ctx, GL_INVALID_OPERATION,
1188                         "glGetTexLevelParameter[if]v(pname)");
1189          }
1190          break;
1191       case GL_TEXTURE_COMPRESSED:
1192          *params = (GLint) _mesa_is_format_compressed(texFormat);
1193          break;
1194
1195       /* GL_ARB_texture_float */
1196       case GL_TEXTURE_RED_TYPE_ARB:
1197       case GL_TEXTURE_GREEN_TYPE_ARB:
1198       case GL_TEXTURE_BLUE_TYPE_ARB:
1199       case GL_TEXTURE_ALPHA_TYPE_ARB:
1200       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1201       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1202       case GL_TEXTURE_DEPTH_TYPE_ARB:
1203          if (!ctx->Extensions.ARB_texture_float)
1204             goto invalid_pname;
1205          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1206             *params = _mesa_get_format_datatype(texFormat);
1207          else
1208             *params = GL_NONE;
1209          break;
1210
1211       /* GL_ARB_texture_multisample */
1212       case GL_TEXTURE_SAMPLES:
1213          if (!ctx->Extensions.ARB_texture_multisample)
1214             goto invalid_pname;
1215          *params = img->NumSamples;
1216          break;
1217
1218       case GL_TEXTURE_FIXED_SAMPLE_LOCATIONS:
1219          if (!ctx->Extensions.ARB_texture_multisample)
1220             goto invalid_pname;
1221          *params = img->FixedSampleLocations;
1222          break;
1223
1224       default:
1225          goto invalid_pname;
1226    }
1227
1228    /* no error if we get here */
1229    return;
1230
1231 invalid_pname:
1232    _mesa_error(ctx, GL_INVALID_ENUM,
1233                "glGetTexLevelParameter[if]v(pname=%s)",
1234                _mesa_lookup_enum_by_nr(pname));
1235 }
1236
1237
1238 static void
1239 get_tex_level_parameter_buffer(struct gl_context *ctx,
1240                                const struct gl_texture_object *texObj,
1241                                GLenum pname, GLint *params)
1242 {
1243    const struct gl_buffer_object *bo = texObj->BufferObject;
1244    gl_format texFormat = texObj->_BufferObjectFormat;
1245    GLenum internalFormat = texObj->BufferObjectFormat;
1246    GLenum baseFormat = _mesa_get_format_base_format(texFormat);
1247
1248    if (!bo) {
1249       /* undefined texture buffer object */
1250       *params = pname == GL_TEXTURE_COMPONENTS ? 1 : 0;
1251       return;
1252    }
1253
1254    switch (pname) {
1255       case GL_TEXTURE_BUFFER_DATA_STORE_BINDING:
1256          *params = bo->Name;
1257          break;
1258       case GL_TEXTURE_WIDTH:
1259          *params = bo->Size;
1260          break;
1261       case GL_TEXTURE_HEIGHT:
1262       case GL_TEXTURE_DEPTH:
1263       case GL_TEXTURE_BORDER:
1264       case GL_TEXTURE_SHARED_SIZE:
1265       case GL_TEXTURE_COMPRESSED:
1266          *params = 0;
1267          break;
1268       case GL_TEXTURE_INTERNAL_FORMAT:
1269          *params = internalFormat;
1270          break;
1271       case GL_TEXTURE_RED_SIZE:
1272       case GL_TEXTURE_GREEN_SIZE:
1273       case GL_TEXTURE_BLUE_SIZE:
1274       case GL_TEXTURE_ALPHA_SIZE:
1275          if (_mesa_base_format_has_channel(baseFormat, pname))
1276             *params = _mesa_get_format_bits(texFormat, pname);
1277          else
1278             *params = 0;
1279          break;
1280       case GL_TEXTURE_INTENSITY_SIZE:
1281       case GL_TEXTURE_LUMINANCE_SIZE:
1282          if (_mesa_base_format_has_channel(baseFormat, pname)) {
1283             *params = _mesa_get_format_bits(texFormat, pname);
1284             if (*params == 0) {
1285                /* intensity or luminance is probably stored as RGB[A] */
1286                *params = MIN2(_mesa_get_format_bits(texFormat,
1287                                                     GL_TEXTURE_RED_SIZE),
1288                               _mesa_get_format_bits(texFormat,
1289                                                     GL_TEXTURE_GREEN_SIZE));
1290             }
1291          } else {
1292             *params = 0;
1293          }
1294          break;
1295       case GL_TEXTURE_DEPTH_SIZE_ARB:
1296       case GL_TEXTURE_STENCIL_SIZE_EXT:
1297          *params = _mesa_get_format_bits(texFormat, pname);
1298          break;
1299
1300       /* GL_ARB_texture_buffer_range */
1301       case GL_TEXTURE_BUFFER_OFFSET:
1302          if (!ctx->Extensions.ARB_texture_buffer_range)
1303             goto invalid_pname;
1304          *params = texObj->BufferOffset;
1305          break;
1306       case GL_TEXTURE_BUFFER_SIZE:
1307          if (!ctx->Extensions.ARB_texture_buffer_range)
1308             goto invalid_pname;
1309          *params = (texObj->BufferSize == -1) ? bo->Size : texObj->BufferSize;
1310          break;
1311
1312       /* GL_ARB_texture_compression */
1313       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1314          /* Always illegal for GL_TEXTURE_BUFFER */
1315          _mesa_error(ctx, GL_INVALID_OPERATION,
1316                      "glGetTexLevelParameter[if]v(pname)");
1317          break;
1318
1319       /* GL_ARB_texture_float */
1320       case GL_TEXTURE_RED_TYPE_ARB:
1321       case GL_TEXTURE_GREEN_TYPE_ARB:
1322       case GL_TEXTURE_BLUE_TYPE_ARB:
1323       case GL_TEXTURE_ALPHA_TYPE_ARB:
1324       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1325       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1326       case GL_TEXTURE_DEPTH_TYPE_ARB:
1327          if (!ctx->Extensions.ARB_texture_float)
1328             goto invalid_pname;
1329          if (_mesa_base_format_has_channel(baseFormat, pname))
1330             *params = _mesa_get_format_datatype(texFormat);
1331          else
1332             *params = GL_NONE;
1333          break;
1334
1335       default:
1336          goto invalid_pname;
1337    }
1338
1339    /* no error if we get here */
1340    return;
1341
1342 invalid_pname:
1343    _mesa_error(ctx, GL_INVALID_ENUM,
1344                "glGetTexLevelParameter[if]v(pname=%s)",
1345                _mesa_lookup_enum_by_nr(pname));
1346 }
1347
1348
1349 void GLAPIENTRY
1350 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
1351                               GLenum pname, GLfloat *params )
1352 {
1353    GLint iparam;
1354    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
1355    *params = (GLfloat) iparam;
1356 }
1357
1358
1359 void GLAPIENTRY
1360 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
1361                               GLenum pname, GLint *params )
1362 {
1363    const struct gl_texture_unit *texUnit;
1364    struct gl_texture_object *texObj;
1365    GLint maxLevels;
1366    GET_CURRENT_CONTEXT(ctx);
1367
1368    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
1369       _mesa_error(ctx, GL_INVALID_OPERATION,
1370                   "glGetTexLevelParameteriv(current unit)");
1371       return;
1372    }
1373
1374    texUnit = _mesa_get_current_tex_unit(ctx);
1375
1376    if (!legal_get_tex_level_parameter_target(ctx, target)) {
1377       _mesa_error(ctx, GL_INVALID_ENUM,
1378                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
1379       return;
1380    }
1381
1382    maxLevels = _mesa_max_texture_levels(ctx, target);
1383    assert(maxLevels != 0);
1384
1385    if (level < 0 || level >= maxLevels) {
1386       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
1387       return;
1388    }
1389
1390    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1391
1392    if (target == GL_TEXTURE_BUFFER)
1393       get_tex_level_parameter_buffer(ctx, texObj, pname, params);
1394    else
1395       get_tex_level_parameter_image(ctx, texObj, target, level, pname, params);
1396 }
1397
1398
1399 void GLAPIENTRY
1400 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
1401 {
1402    struct gl_texture_object *obj;
1403    GET_CURRENT_CONTEXT(ctx);
1404
1405    obj = get_texobj(ctx, target, GL_TRUE);
1406    if (!obj)
1407       return;
1408
1409    _mesa_lock_texture(ctx, obj);
1410    switch (pname) {
1411       case GL_TEXTURE_MAG_FILTER:
1412          *params = ENUM_TO_FLOAT(obj->Sampler.MagFilter);
1413          break;
1414       case GL_TEXTURE_MIN_FILTER:
1415          *params = ENUM_TO_FLOAT(obj->Sampler.MinFilter);
1416          break;
1417       case GL_TEXTURE_WRAP_S:
1418          *params = ENUM_TO_FLOAT(obj->Sampler.WrapS);
1419          break;
1420       case GL_TEXTURE_WRAP_T:
1421          *params = ENUM_TO_FLOAT(obj->Sampler.WrapT);
1422          break;
1423       case GL_TEXTURE_WRAP_R:
1424          *params = ENUM_TO_FLOAT(obj->Sampler.WrapR);
1425          break;
1426       case GL_TEXTURE_BORDER_COLOR:
1427          if (!_mesa_is_desktop_gl(ctx))
1428             goto invalid_pname;
1429
1430          if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
1431             _mesa_update_state_locked(ctx);
1432          if (_mesa_get_clamp_fragment_color(ctx)) {
1433             params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1434             params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1435             params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1436             params[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1437          }
1438          else {
1439             params[0] = obj->Sampler.BorderColor.f[0];
1440             params[1] = obj->Sampler.BorderColor.f[1];
1441             params[2] = obj->Sampler.BorderColor.f[2];
1442             params[3] = obj->Sampler.BorderColor.f[3];
1443          }
1444          break;
1445       case GL_TEXTURE_RESIDENT:
1446          if (ctx->API != API_OPENGL_COMPAT)
1447             goto invalid_pname;
1448
1449          *params = 1.0F;
1450          break;
1451       case GL_TEXTURE_PRIORITY:
1452          if (ctx->API != API_OPENGL_COMPAT)
1453             goto invalid_pname;
1454
1455          *params = obj->Priority;
1456          break;
1457       case GL_TEXTURE_MIN_LOD:
1458          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1459             goto invalid_pname;
1460
1461          *params = obj->Sampler.MinLod;
1462          break;
1463       case GL_TEXTURE_MAX_LOD:
1464          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1465             goto invalid_pname;
1466
1467          *params = obj->Sampler.MaxLod;
1468          break;
1469       case GL_TEXTURE_BASE_LEVEL:
1470          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1471             goto invalid_pname;
1472
1473          *params = (GLfloat) obj->BaseLevel;
1474          break;
1475       case GL_TEXTURE_MAX_LEVEL:
1476          *params = (GLfloat) obj->MaxLevel;
1477          break;
1478       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1479          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1480             goto invalid_pname;
1481          *params = obj->Sampler.MaxAnisotropy;
1482          break;
1483       case GL_GENERATE_MIPMAP_SGIS:
1484          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1485             goto invalid_pname;
1486
1487          *params = (GLfloat) obj->GenerateMipmap;
1488          break;
1489       case GL_TEXTURE_COMPARE_MODE_ARB:
1490          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1491              && !_mesa_is_gles3(ctx))
1492             goto invalid_pname;
1493          *params = (GLfloat) obj->Sampler.CompareMode;
1494          break;
1495       case GL_TEXTURE_COMPARE_FUNC_ARB:
1496          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1497              && !_mesa_is_gles3(ctx))
1498             goto invalid_pname;
1499          *params = (GLfloat) obj->Sampler.CompareFunc;
1500          break;
1501       case GL_DEPTH_TEXTURE_MODE_ARB:
1502          /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has
1503           * never existed in OpenGL ES.
1504           */
1505          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1506             goto invalid_pname;
1507          *params = (GLfloat) obj->DepthMode;
1508          break;
1509       case GL_TEXTURE_LOD_BIAS:
1510          if (ctx->API != API_OPENGL_COMPAT)
1511             goto invalid_pname;
1512
1513          *params = obj->Sampler.LodBias;
1514          break;
1515       case GL_TEXTURE_CROP_RECT_OES:
1516          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1517             goto invalid_pname;
1518
1519          params[0] = (GLfloat) obj->CropRect[0];
1520          params[1] = (GLfloat) obj->CropRect[1];
1521          params[2] = (GLfloat) obj->CropRect[2];
1522          params[3] = (GLfloat) obj->CropRect[3];
1523          break;
1524
1525       case GL_TEXTURE_SWIZZLE_R_EXT:
1526       case GL_TEXTURE_SWIZZLE_G_EXT:
1527       case GL_TEXTURE_SWIZZLE_B_EXT:
1528       case GL_TEXTURE_SWIZZLE_A_EXT:
1529          if ((!_mesa_is_desktop_gl(ctx)
1530               || !ctx->Extensions.EXT_texture_swizzle)
1531              && !_mesa_is_gles3(ctx))
1532             goto invalid_pname;
1533          *params = (GLfloat) obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1534          break;
1535
1536       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1537          if ((!_mesa_is_desktop_gl(ctx)
1538               || !ctx->Extensions.EXT_texture_swizzle)
1539              && !_mesa_is_gles3(ctx)) {
1540             goto invalid_pname;
1541          }
1542          else {
1543             GLuint comp;
1544             for (comp = 0; comp < 4; comp++) {
1545                params[comp] = (GLfloat) obj->Swizzle[comp];
1546             }
1547          }
1548          break;
1549
1550       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1551          if (!_mesa_is_desktop_gl(ctx)
1552              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1553             goto invalid_pname;
1554          *params = (GLfloat) obj->Sampler.CubeMapSeamless;
1555          break;
1556
1557       case GL_TEXTURE_IMMUTABLE_FORMAT:
1558          *params = (GLfloat) obj->Immutable;
1559          break;
1560
1561       case GL_TEXTURE_IMMUTABLE_LEVELS:
1562          if (!_mesa_is_gles3(ctx))
1563             goto invalid_pname;
1564          *params = (GLfloat) obj->ImmutableLevels;
1565          break;
1566
1567       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1568          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1569             goto invalid_pname;
1570          *params = (GLfloat) obj->RequiredTextureImageUnits;
1571          break;
1572
1573       case GL_TEXTURE_SRGB_DECODE_EXT:
1574          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1575             goto invalid_pname;
1576          *params = (GLfloat) obj->Sampler.sRGBDecode;
1577          break;
1578
1579       default:
1580          goto invalid_pname;
1581    }
1582
1583    /* no error if we get here */
1584    _mesa_unlock_texture(ctx, obj);
1585    return;
1586
1587 invalid_pname:
1588    _mesa_unlock_texture(ctx, obj);
1589    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname);
1590 }
1591
1592
1593 void GLAPIENTRY
1594 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1595 {
1596    struct gl_texture_object *obj;
1597    GET_CURRENT_CONTEXT(ctx);
1598
1599    obj = get_texobj(ctx, target, GL_TRUE);
1600    if (!obj)
1601       return;
1602
1603    _mesa_lock_texture(ctx, obj);
1604    switch (pname) {
1605       case GL_TEXTURE_MAG_FILTER:
1606          *params = (GLint) obj->Sampler.MagFilter;
1607          break;
1608       case GL_TEXTURE_MIN_FILTER:
1609          *params = (GLint) obj->Sampler.MinFilter;
1610          break;
1611       case GL_TEXTURE_WRAP_S:
1612          *params = (GLint) obj->Sampler.WrapS;
1613          break;
1614       case GL_TEXTURE_WRAP_T:
1615          *params = (GLint) obj->Sampler.WrapT;
1616          break;
1617       case GL_TEXTURE_WRAP_R:
1618          *params = (GLint) obj->Sampler.WrapR;
1619          break;
1620       case GL_TEXTURE_BORDER_COLOR:
1621          if (!_mesa_is_desktop_gl(ctx))
1622             goto invalid_pname;
1623
1624          {
1625             GLfloat b[4];
1626             b[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1627             b[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1628             b[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1629             b[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1630             params[0] = FLOAT_TO_INT(b[0]);
1631             params[1] = FLOAT_TO_INT(b[1]);
1632             params[2] = FLOAT_TO_INT(b[2]);
1633             params[3] = FLOAT_TO_INT(b[3]);
1634          }
1635          break;
1636       case GL_TEXTURE_RESIDENT:
1637          if (ctx->API != API_OPENGL_COMPAT)
1638             goto invalid_pname;
1639
1640          *params = 1;
1641          break;
1642       case GL_TEXTURE_PRIORITY:
1643          if (ctx->API != API_OPENGL_COMPAT)
1644             goto invalid_pname;
1645
1646          *params = FLOAT_TO_INT(obj->Priority);
1647          break;
1648       case GL_TEXTURE_MIN_LOD:
1649          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1650             goto invalid_pname;
1651
1652          *params = (GLint) obj->Sampler.MinLod;
1653          break;
1654       case GL_TEXTURE_MAX_LOD:
1655          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1656             goto invalid_pname;
1657
1658          *params = (GLint) obj->Sampler.MaxLod;
1659          break;
1660       case GL_TEXTURE_BASE_LEVEL:
1661          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1662             goto invalid_pname;
1663
1664          *params = obj->BaseLevel;
1665          break;
1666       case GL_TEXTURE_MAX_LEVEL:
1667          *params = obj->MaxLevel;
1668          break;
1669       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1670          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1671             goto invalid_pname;
1672          *params = (GLint) obj->Sampler.MaxAnisotropy;
1673          break;
1674       case GL_GENERATE_MIPMAP_SGIS:
1675          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1676             goto invalid_pname;
1677
1678          *params = (GLint) obj->GenerateMipmap;
1679          break;
1680       case GL_TEXTURE_COMPARE_MODE_ARB:
1681          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1682              && !_mesa_is_gles3(ctx))
1683             goto invalid_pname;
1684          *params = (GLint) obj->Sampler.CompareMode;
1685          break;
1686       case GL_TEXTURE_COMPARE_FUNC_ARB:
1687          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1688              && !_mesa_is_gles3(ctx))
1689             goto invalid_pname;
1690          *params = (GLint) obj->Sampler.CompareFunc;
1691          break;
1692       case GL_DEPTH_TEXTURE_MODE_ARB:
1693          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1694             goto invalid_pname;
1695          *params = (GLint) obj->DepthMode;
1696          break;
1697       case GL_TEXTURE_LOD_BIAS:
1698          if (ctx->API != API_OPENGL_COMPAT)
1699             goto invalid_pname;
1700
1701          *params = (GLint) obj->Sampler.LodBias;
1702          break;
1703       case GL_TEXTURE_CROP_RECT_OES:
1704          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1705             goto invalid_pname;
1706
1707          params[0] = obj->CropRect[0];
1708          params[1] = obj->CropRect[1];
1709          params[2] = obj->CropRect[2];
1710          params[3] = obj->CropRect[3];
1711          break;
1712       case GL_TEXTURE_SWIZZLE_R_EXT:
1713       case GL_TEXTURE_SWIZZLE_G_EXT:
1714       case GL_TEXTURE_SWIZZLE_B_EXT:
1715       case GL_TEXTURE_SWIZZLE_A_EXT:
1716          if ((!_mesa_is_desktop_gl(ctx)
1717               || !ctx->Extensions.EXT_texture_swizzle)
1718              && !_mesa_is_gles3(ctx))
1719             goto invalid_pname;
1720          *params = obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1721          break;
1722
1723       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1724          if ((!_mesa_is_desktop_gl(ctx)
1725               || !ctx->Extensions.EXT_texture_swizzle)
1726              && !_mesa_is_gles3(ctx))
1727             goto invalid_pname;
1728          COPY_4V(params, obj->Swizzle);
1729          break;
1730
1731       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1732          if (!_mesa_is_desktop_gl(ctx)
1733              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1734             goto invalid_pname;
1735          *params = (GLint) obj->Sampler.CubeMapSeamless;
1736          break;
1737
1738       case GL_TEXTURE_IMMUTABLE_FORMAT:
1739          *params = (GLint) obj->Immutable;
1740          break;
1741
1742       case GL_TEXTURE_IMMUTABLE_LEVELS:
1743          if (!_mesa_is_gles3(ctx))
1744             goto invalid_pname;
1745          *params = obj->ImmutableLevels;
1746          break;
1747
1748       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1749          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1750             goto invalid_pname;
1751          *params = obj->RequiredTextureImageUnits;
1752          break;
1753
1754       case GL_TEXTURE_SRGB_DECODE_EXT:
1755          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1756             goto invalid_pname;
1757          *params = obj->Sampler.sRGBDecode;
1758          break;
1759
1760       default:
1761          goto invalid_pname;
1762    }
1763
1764    /* no error if we get here */
1765    _mesa_unlock_texture(ctx, obj);
1766    return;
1767
1768 invalid_pname:
1769    _mesa_unlock_texture(ctx, obj);
1770    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
1771 }
1772
1773
1774 /** New in GL 3.0 */
1775 void GLAPIENTRY
1776 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1777 {
1778    struct gl_texture_object *texObj;
1779    GET_CURRENT_CONTEXT(ctx);
1780
1781    texObj = get_texobj(ctx, target, GL_TRUE);
1782    if (!texObj)
1783       return;
1784
1785    switch (pname) {
1786    case GL_TEXTURE_BORDER_COLOR:
1787       COPY_4V(params, texObj->Sampler.BorderColor.i);
1788       break;
1789    default:
1790       _mesa_GetTexParameteriv(target, pname, params);
1791    }
1792 }
1793
1794
1795 /** New in GL 3.0 */
1796 void GLAPIENTRY
1797 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1798 {
1799    struct gl_texture_object *texObj;
1800    GET_CURRENT_CONTEXT(ctx);
1801
1802    texObj = get_texobj(ctx, target, GL_TRUE);
1803    if (!texObj)
1804       return;
1805
1806    switch (pname) {
1807    case GL_TEXTURE_BORDER_COLOR:
1808       COPY_4V(params, texObj->Sampler.BorderColor.i);
1809       break;
1810    default:
1811       {
1812          GLint ip[4];
1813          _mesa_GetTexParameteriv(target, pname, ip);
1814          params[0] = ip[0];
1815          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1816              pname == GL_TEXTURE_CROP_RECT_OES) {
1817             params[1] = ip[1];
1818             params[2] = ip[2];
1819             params[3] = ip[3];
1820          }
1821       }
1822    }
1823 }