src/mesa/main/texparam.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.5
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR 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/mfeatures.h"
  42 #include "main/mtypes.h"
  43 #include "main/state.h"
  44 #include "main/texcompress.h"
  45 #include "main/texobj.h"
  46 #include "main/texparam.h"
  47 #include "main/teximage.h"
  48 #include "main/texstate.h"
  49 #include "program/prog_instruction.h"
  50
  51
  52 /**
  53  * Check if a coordinate wrap mode is supported for the texture target.
  54  * \return GL_TRUE if legal, GL_FALSE otherwise
  55  */
  56 static GLboolean
  57 validate_texture_wrap_mode(struct gl_context * ctx, GLenum target, GLenum wrap)
  58 {
  59    const struct gl_extensions * const e = & ctx->Extensions;
  60    const bool is_desktop_gl = _mesa_is_desktop_gl(ctx);
  61    bool supported;
  62
  63    switch (wrap) {
  64    case GL_CLAMP:
  65       /* GL_CLAMP was removed in the core profile, and it has never existed in
  66        * OpenGL ES.
  67        */
  68       supported = (ctx->API == API_OPENGL_COMPAT)
  69          && (target != GL_TEXTURE_EXTERNAL_OES);
  70       break;
  71
  72    case GL_CLAMP_TO_EDGE:
  73       supported = true;
  74       break;
  75
  76    case GL_CLAMP_TO_BORDER:
  77       supported = is_desktop_gl && e->ARB_texture_border_clamp
  78          && (target != GL_TEXTURE_EXTERNAL_OES);
  79       break;
  80
  81    case GL_REPEAT:
  82    case GL_MIRRORED_REPEAT:
  83       supported = (target != GL_TEXTURE_RECTANGLE_NV)
  84          && (target != GL_TEXTURE_EXTERNAL_OES);
  85       break;
  86
  87    case GL_MIRROR_CLAMP_EXT:
  88    case GL_MIRROR_CLAMP_TO_EDGE_EXT:
  89       supported = is_desktop_gl
  90          && (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)
  91          && (target != GL_TEXTURE_RECTANGLE_NV)
  92          && (target != GL_TEXTURE_EXTERNAL_OES);
  93       break;
  94
  95    case GL_MIRROR_CLAMP_TO_BORDER_EXT:
  96       supported = is_desktop_gl && e->EXT_texture_mirror_clamp
  97          && (target != GL_TEXTURE_RECTANGLE_NV)
  98          && (target != GL_TEXTURE_EXTERNAL_OES);
  99       break;
 100
 101    default:
 102       supported = false;
 103       break;
 104    }
 105
 106    if (!supported)
 107       _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)", wrap );
 108
 109    return supported;
 110 }
 111
 112
 113 /**
 114  * Get current texture object for given target.
 115  * Return NULL if any error (and record the error).
 116  * Note that this is different from _mesa_select_tex_object() in that proxy
 117  * targets are not accepted.
 118  * Only the glGetTexLevelParameter() functions accept proxy targets.
 119  */
 120 static struct gl_texture_object *
 121 get_texobj(struct gl_context *ctx, GLenum target, GLboolean get)
 122 {
 123    struct gl_texture_unit *texUnit;
 124
 125    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
 126       _mesa_error(ctx, GL_INVALID_OPERATION,
 127                   "gl%sTexParameter(current unit)", get ? "Get" : "");
 128       return NULL;
 129    }
 130
 131    texUnit = _mesa_get_current_tex_unit(ctx);
 132
 133    switch (target) {
 134    case GL_TEXTURE_1D:
 135       if (_mesa_is_desktop_gl(ctx))
 136          return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 137       break;
 138    case GL_TEXTURE_2D:
 139       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 140    case GL_TEXTURE_3D:
 141       if (ctx->API != API_OPENGLES)
 142          return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 143       break;
 144    case GL_TEXTURE_CUBE_MAP:
 145       if (ctx->Extensions.ARB_texture_cube_map) {
 146          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 147       }
 148       break;
 149    case GL_TEXTURE_RECTANGLE_NV:
 150       if (_mesa_is_desktop_gl(ctx)
 151           && ctx->Extensions.NV_texture_rectangle) {
 152          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 153       }
 154       break;
 155    case GL_TEXTURE_1D_ARRAY_EXT:
 156       if (_mesa_is_desktop_gl(ctx)
 157           && (ctx->Extensions.MESA_texture_array ||
 158               ctx->Extensions.EXT_texture_array)) {
 159          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 160       }
 161       break;
 162    case GL_TEXTURE_2D_ARRAY_EXT:
 163       if ((_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx))
 164           && (ctx->Extensions.MESA_texture_array ||
 165               ctx->Extensions.EXT_texture_array)) {
 166          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 167       }
 168       break;
 169    case GL_TEXTURE_EXTERNAL_OES:
 170       if (_mesa_is_gles(ctx) && ctx->Extensions.OES_EGL_image_external) {
 171          return texUnit->CurrentTex[TEXTURE_EXTERNAL_INDEX];
 172       }
 173       break;
 174    case GL_TEXTURE_CUBE_MAP_ARRAY:
 175       if (ctx->Extensions.ARB_texture_cube_map_array) {
 176          return texUnit->CurrentTex[TEXTURE_CUBE_ARRAY_INDEX];
 177       }
 178       break;
 179    case GL_TEXTURE_2D_MULTISAMPLE:
 180       if (ctx->Extensions.ARB_texture_storage_multisample) {
 181          return texUnit->CurrentTex[TEXTURE_2D_MULTISAMPLE_INDEX];
 182       }
 183       break;
 184    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 185       if (ctx->Extensions.ARB_texture_storage_multisample) {
 186          return texUnit->CurrentTex[TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX];
 187       }
 188       break;
 189    default:
 190       ;
 191    }
 192
 193    _mesa_error(ctx, GL_INVALID_ENUM,
 194                   "gl%sTexParameter(target)", get ? "Get" : "");
 195    return NULL;
 196 }
 197
 198
 199 /**
 200  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 201  * \return -1 if error.
 202  */
 203 static GLint
 204 comp_to_swizzle(GLenum comp)
 205 {
 206    switch (comp) {
 207    case GL_RED:
 208       return SWIZZLE_X;
 209    case GL_GREEN:
 210       return SWIZZLE_Y;
 211    case GL_BLUE:
 212       return SWIZZLE_Z;
 213    case GL_ALPHA:
 214       return SWIZZLE_W;
 215    case GL_ZERO:
 216       return SWIZZLE_ZERO;
 217    case GL_ONE:
 218       return SWIZZLE_ONE;
 219    default:
 220       return -1;
 221    }
 222 }
 223
 224
 225 static void
 226 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 227 {
 228    ASSERT(comp < 4);
 229    ASSERT(swz <= SWIZZLE_NIL);
 230    {
 231       GLuint mask = 0x7 << (3 * comp);
 232       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 233       *swizzle = s;
 234    }
 235 }
 236
 237
 238 /**
 239  * This is called just prior to changing any texture object state which
 240  * will not effect texture completeness.
 241  */
 242 static inline void
 243 flush(struct gl_context *ctx)
 244 {
 245    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 246 }
 247
 248
 249 /**
 250  * This is called just prior to changing any texture object state which
 251  * can effect texture completeness (texture base level, max level).
 252  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 253  * state flag and then mark the texture object as 'incomplete' so that any
 254  * per-texture derived state gets recomputed.
 255  */
 256 static inline void
 257 incomplete(struct gl_context *ctx, struct gl_texture_object *texObj)
 258 {
 259    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 260    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
 261 }
 262
 263
 264 static GLboolean
 265 target_allows_setting_sampler_parameters(GLenum target)
 266 {
 267    switch (target) {
 268    case GL_TEXTURE_2D_MULTISAMPLE:
 269    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 270       return GL_FALSE;
 271
 272    default:
 273       return GL_TRUE;
 274    }
 275 }
 276
 277
 278 /**
 279  * Set an integer-valued texture parameter
 280  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 281  */
 282 static GLboolean
 283 set_tex_parameteri(struct gl_context *ctx,
 284                    struct gl_texture_object *texObj,
 285                    GLenum pname, const GLint *params)
 286 {
 287    switch (pname) {
 288    case GL_TEXTURE_MIN_FILTER:
 289       if (!target_allows_setting_sampler_parameters(texObj->Target))
 290          goto invalid_operation;
 291
 292       if (texObj->Sampler.MinFilter == params[0])
 293          return GL_FALSE;
 294       switch (params[0]) {
 295       case GL_NEAREST:
 296       case GL_LINEAR:
 297          flush(ctx);
 298          texObj->Sampler.MinFilter = params[0];
 299          return GL_TRUE;
 300       case GL_NEAREST_MIPMAP_NEAREST:
 301       case GL_LINEAR_MIPMAP_NEAREST:
 302       case GL_NEAREST_MIPMAP_LINEAR:
 303       case GL_LINEAR_MIPMAP_LINEAR:
 304          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV &&
 305              texObj->Target != GL_TEXTURE_EXTERNAL_OES) {
 306             flush(ctx);
 307             texObj->Sampler.MinFilter = params[0];
 308             return GL_TRUE;
 309          }
 310          /* fall-through */
 311       default:
 312          goto invalid_param;
 313       }
 314       return GL_FALSE;
 315
 316    case GL_TEXTURE_MAG_FILTER:
 317       if (!target_allows_setting_sampler_parameters(texObj->Target))
 318          goto invalid_operation;
 319
 320       if (texObj->Sampler.MagFilter == params[0])
 321          return GL_FALSE;
 322       switch (params[0]) {
 323       case GL_NEAREST:
 324       case GL_LINEAR:
 325          flush(ctx); /* does not effect completeness */
 326          texObj->Sampler.MagFilter = params[0];
 327          return GL_TRUE;
 328       default:
 329          goto invalid_param;
 330       }
 331       return GL_FALSE;
 332
 333    case GL_TEXTURE_WRAP_S:
 334       if (!target_allows_setting_sampler_parameters(texObj->Target))
 335          goto invalid_operation;
 336
 337       if (texObj->Sampler.WrapS == params[0])
 338          return GL_FALSE;
 339       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 340          flush(ctx);
 341          texObj->Sampler.WrapS = params[0];
 342          return GL_TRUE;
 343       }
 344       return GL_FALSE;
 345
 346    case GL_TEXTURE_WRAP_T:
 347       if (!target_allows_setting_sampler_parameters(texObj->Target))
 348          goto invalid_operation;
 349
 350       if (texObj->Sampler.WrapT == params[0])
 351          return GL_FALSE;
 352       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 353          flush(ctx);
 354          texObj->Sampler.WrapT = params[0];
 355          return GL_TRUE;
 356       }
 357       return GL_FALSE;
 358
 359    case GL_TEXTURE_WRAP_R:
 360       if (!target_allows_setting_sampler_parameters(texObj->Target))
 361          goto invalid_operation;
 362
 363       if (texObj->Sampler.WrapR == params[0])
 364          return GL_FALSE;
 365       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 366          flush(ctx);
 367          texObj->Sampler.WrapR = params[0];
 368          return GL_TRUE;
 369       }
 370       return GL_FALSE;
 371
 372    case GL_TEXTURE_BASE_LEVEL:
 373       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 374          goto invalid_pname;
 375
 376       if (texObj->BaseLevel == params[0])
 377          return GL_FALSE;
 378
 379       if ((texObj->Target == GL_TEXTURE_2D_MULTISAMPLE ||
 380            texObj->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) && params[0] != 0)
 381          goto invalid_operation;
 382
 383       if (params[0] < 0 ||
 384           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 385          _mesa_error(ctx, GL_INVALID_VALUE,
 386                      "glTexParameter(param=%d)", params[0]);
 387          return GL_FALSE;
 388       }
 389       incomplete(ctx, texObj);
 390       texObj->BaseLevel = params[0];
 391       return GL_TRUE;
 392
 393    case GL_TEXTURE_MAX_LEVEL:
 394       if (texObj->MaxLevel == params[0])
 395          return GL_FALSE;
 396
 397       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 398          _mesa_error(ctx, GL_INVALID_VALUE,
 399                      "glTexParameter(param=%d)", params[0]);
 400          return GL_FALSE;
 401       }
 402       incomplete(ctx, texObj);
 403       texObj->MaxLevel = params[0];
 404       return GL_TRUE;
 405
 406    case GL_GENERATE_MIPMAP_SGIS:
 407       if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 408          goto invalid_pname;
 409
 410       if (params[0] && texObj->Target == GL_TEXTURE_EXTERNAL_OES)
 411          goto invalid_param;
 412       if (texObj->GenerateMipmap != params[0]) {
 413          /* no flush() */
 414          texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 415          return GL_TRUE;
 416       }
 417       return GL_FALSE;
 418
 419    case GL_TEXTURE_COMPARE_MODE_ARB:
 420       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 421           || _mesa_is_gles3(ctx)) {
 422
 423          if (!target_allows_setting_sampler_parameters(texObj->Target))
 424             goto invalid_operation;
 425
 426          if (texObj->Sampler.CompareMode == params[0])
 427             return GL_FALSE;
 428          if (params[0] == GL_NONE ||
 429              params[0] == GL_COMPARE_R_TO_TEXTURE_ARB) {
 430             flush(ctx);
 431             texObj->Sampler.CompareMode = params[0];
 432             return GL_TRUE;
 433          }
 434          goto invalid_param;
 435       }
 436       goto invalid_pname;
 437
 438    case GL_TEXTURE_COMPARE_FUNC_ARB:
 439       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 440           || _mesa_is_gles3(ctx)) {
 441
 442          if (!target_allows_setting_sampler_parameters(texObj->Target))
 443             goto invalid_operation;
 444
 445          if (texObj->Sampler.CompareFunc == params[0])
 446             return GL_FALSE;
 447          switch (params[0]) {
 448          case GL_LEQUAL:
 449          case GL_GEQUAL:
 450             flush(ctx);
 451             texObj->Sampler.CompareFunc = params[0];
 452             return GL_TRUE;
 453          case GL_EQUAL:
 454          case GL_NOTEQUAL:
 455          case GL_LESS:
 456          case GL_GREATER:
 457          case GL_ALWAYS:
 458          case GL_NEVER:
 459             if (ctx->Extensions.EXT_shadow_funcs) {
 460                flush(ctx);
 461                texObj->Sampler.CompareFunc = params[0];
 462                return GL_TRUE;
 463             }
 464             /* fall-through */
 465          default:
 466             goto invalid_param;
 467          }
 468       }
 469       goto invalid_pname;
 470
 471    case GL_DEPTH_TEXTURE_MODE_ARB:
 472       /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has never
 473        * existed in OpenGL ES.
 474        */
 475       if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.ARB_depth_texture) {
 476          if (texObj->DepthMode == params[0])
 477             return GL_FALSE;
 478          if (params[0] == GL_LUMINANCE ||
 479              params[0] == GL_INTENSITY ||
 480              params[0] == GL_ALPHA ||
 481              (ctx->Extensions.ARB_texture_rg && params[0] == GL_RED)) {
 482             flush(ctx);
 483             texObj->DepthMode = params[0];
 484             return GL_TRUE;
 485          }
 486          goto invalid_param;
 487       }
 488       goto invalid_pname;
 489
 490    case GL_TEXTURE_CROP_RECT_OES:
 491       if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
 492          goto invalid_pname;
 493
 494       texObj->CropRect[0] = params[0];
 495       texObj->CropRect[1] = params[1];
 496       texObj->CropRect[2] = params[2];
 497       texObj->CropRect[3] = params[3];
 498       return GL_TRUE;
 499
 500    case GL_TEXTURE_SWIZZLE_R_EXT:
 501    case GL_TEXTURE_SWIZZLE_G_EXT:
 502    case GL_TEXTURE_SWIZZLE_B_EXT:
 503    case GL_TEXTURE_SWIZZLE_A_EXT:
 504       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 505           || _mesa_is_gles3(ctx)) {
 506          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 507          const GLint swz = comp_to_swizzle(params[0]);
 508          if (swz < 0) {
 509             _mesa_error(ctx, GL_INVALID_OPERATION,
 510                         "glTexParameter(swizzle 0x%x)", params[0]);
 511             return GL_FALSE;
 512          }
 513          ASSERT(comp < 4);
 514
 515          flush(ctx);
 516          texObj->Swizzle[comp] = params[0];
 517          set_swizzle_component(&texObj->_Swizzle, comp, swz);
 518          return GL_TRUE;
 519       }
 520       goto invalid_pname;
 521
 522    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 523       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 524           || _mesa_is_gles3(ctx)) {
 525          GLuint comp;
 526          flush(ctx);
 527          for (comp = 0; comp < 4; comp++) {
 528             const GLint swz = comp_to_swizzle(params[comp]);
 529             if (swz >= 0) {
 530                texObj->Swizzle[comp] = params[comp];
 531                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 532             }
 533             else {
 534                _mesa_error(ctx, GL_INVALID_OPERATION,
 535                            "glTexParameter(swizzle 0x%x)", params[comp]);
 536                return GL_FALSE;
 537             }
 538          }
 539          return GL_TRUE;
 540       }
 541       goto invalid_pname;
 542
 543    case GL_TEXTURE_SRGB_DECODE_EXT:
 544       if (_mesa_is_desktop_gl(ctx)
 545           && ctx->Extensions.EXT_texture_sRGB_decode) {
 546          GLenum decode = params[0];
 547
 548          if (!target_allows_setting_sampler_parameters(texObj->Target))
 549             goto invalid_operation;
 550
 551          if (decode == GL_DECODE_EXT || decode == GL_SKIP_DECODE_EXT) {
 552             if (texObj->Sampler.sRGBDecode != decode) {
 553                flush(ctx);
 554                texObj->Sampler.sRGBDecode = decode;
 555             }
 556             return GL_TRUE;
 557          }
 558       }
 559       goto invalid_pname;
 560
 561    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 562       if (_mesa_is_desktop_gl(ctx)
 563           && ctx->Extensions.AMD_seamless_cubemap_per_texture) {
 564          GLenum param = params[0];
 565
 566          if (!target_allows_setting_sampler_parameters(texObj->Target))
 567             goto invalid_operation;
 568
 569          if (param != GL_TRUE && param != GL_FALSE) {
 570             goto invalid_param;
 571          }
 572          if (param != texObj->Sampler.CubeMapSeamless) {
 573             flush(ctx);
 574             texObj->Sampler.CubeMapSeamless = param;
 575          }
 576          return GL_TRUE;
 577       }
 578       goto invalid_pname;
 579
 580    default:
 581       goto invalid_pname;
 582    }
 583
 584 invalid_pname:
 585    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 586                _mesa_lookup_enum_by_nr(pname));
 587    return GL_FALSE;
 588
 589 invalid_param:
 590    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param=%s)",
 591                _mesa_lookup_enum_by_nr(params[0]));
 592    return GL_FALSE;
 593
 594 invalid_operation:
 595    _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(pname=%s)",
 596                _mesa_lookup_enum_by_nr(pname));
 597    return GL_FALSE;
 598 }
 599
 600
 601 /**
 602  * Set a float-valued texture parameter
 603  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 604  */
 605 static GLboolean
 606 set_tex_parameterf(struct gl_context *ctx,
 607                    struct gl_texture_object *texObj,
 608                    GLenum pname, const GLfloat *params)
 609 {
 610    switch (pname) {
 611    case GL_TEXTURE_MIN_LOD:
 612       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 613          goto invalid_pname;
 614
 615       if (!target_allows_setting_sampler_parameters(texObj->Target))
 616          goto invalid_operation;
 617
 618       if (texObj->Sampler.MinLod == params[0])
 619          return GL_FALSE;
 620       flush(ctx);
 621       texObj->Sampler.MinLod = params[0];
 622       return GL_TRUE;
 623
 624    case GL_TEXTURE_MAX_LOD:
 625       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 626          goto invalid_pname;
 627
 628       if (!target_allows_setting_sampler_parameters(texObj->Target))
 629          goto invalid_operation;
 630
 631       if (texObj->Sampler.MaxLod == params[0])
 632          return GL_FALSE;
 633       flush(ctx);
 634       texObj->Sampler.MaxLod = params[0];
 635       return GL_TRUE;
 636
 637    case GL_TEXTURE_PRIORITY:
 638       if (ctx->API != API_OPENGL_COMPAT)
 639          goto invalid_pname;
 640
 641       flush(ctx);
 642       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 643       return GL_TRUE;
 644
 645    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 646       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 647          if (!target_allows_setting_sampler_parameters(texObj->Target))
 648             goto invalid_operation;
 649
 650          if (texObj->Sampler.MaxAnisotropy == params[0])
 651             return GL_FALSE;
 652          if (params[0] < 1.0) {
 653             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 654             return GL_FALSE;
 655          }
 656          flush(ctx);
 657          /* clamp to max, that's what NVIDIA does */
 658          texObj->Sampler.MaxAnisotropy = MIN2(params[0],
 659                                       ctx->Const.MaxTextureMaxAnisotropy);
 660          return GL_TRUE;
 661       }
 662       else {
 663          static GLuint count = 0;
 664          if (count++ < 10)
 665             goto invalid_pname;
 666       }
 667       return GL_FALSE;
 668
 669    case GL_TEXTURE_LOD_BIAS:
 670       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias.
 671        * It was removed in core-profile, and it has never existed in OpenGL
 672        * ES.
 673        */
 674       if (ctx->API != API_OPENGL_COMPAT)
 675          goto invalid_pname;
 676
 677       if (!target_allows_setting_sampler_parameters(texObj->Target))
 678          goto invalid_operation;
 679
 680       if (texObj->Sampler.LodBias != params[0]) {
 681          flush(ctx);
 682          texObj->Sampler.LodBias = params[0];
 683          return GL_TRUE;
 684       }
 685       break;
 686
 687    case GL_TEXTURE_BORDER_COLOR:
 688       if (!_mesa_is_desktop_gl(ctx))
 689          goto invalid_pname;
 690
 691       if (!target_allows_setting_sampler_parameters(texObj->Target))
 692          goto invalid_operation;
 693
 694       flush(ctx);
 695       /* ARB_texture_float disables clamping */
 696       if (ctx->Extensions.ARB_texture_float) {
 697          texObj->Sampler.BorderColor.f[RCOMP] = params[0];
 698          texObj->Sampler.BorderColor.f[GCOMP] = params[1];
 699          texObj->Sampler.BorderColor.f[BCOMP] = params[2];
 700          texObj->Sampler.BorderColor.f[ACOMP] = params[3];
 701       } else {
 702          texObj->Sampler.BorderColor.f[RCOMP] = CLAMP(params[0], 0.0F, 1.0F);
 703          texObj->Sampler.BorderColor.f[GCOMP] = CLAMP(params[1], 0.0F, 1.0F);
 704          texObj->Sampler.BorderColor.f[BCOMP] = CLAMP(params[2], 0.0F, 1.0F);
 705          texObj->Sampler.BorderColor.f[ACOMP] = CLAMP(params[3], 0.0F, 1.0F);
 706       }
 707       return GL_TRUE;
 708
 709    default:
 710       goto invalid_pname;
 711    }
 712    return GL_FALSE;
 713
 714 invalid_pname:
 715    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 716                _mesa_lookup_enum_by_nr(pname));
 717    return GL_FALSE;
 718
 719 invalid_operation:
 720    _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(pname=%s)",
 721                _mesa_lookup_enum_by_nr(pname));
 722    return GL_FALSE;
 723 }
 724
 725
 726 void GLAPIENTRY
 727 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 728 {
 729    GLboolean need_update;
 730    struct gl_texture_object *texObj;
 731    GET_CURRENT_CONTEXT(ctx);
 732
 733    texObj = get_texobj(ctx, target, GL_FALSE);
 734    if (!texObj)
 735       return;
 736
 737    switch (pname) {
 738    case GL_TEXTURE_MIN_FILTER:
 739    case GL_TEXTURE_MAG_FILTER:
 740    case GL_TEXTURE_WRAP_S:
 741    case GL_TEXTURE_WRAP_T:
 742    case GL_TEXTURE_WRAP_R:
 743    case GL_TEXTURE_BASE_LEVEL:
 744    case GL_TEXTURE_MAX_LEVEL:
 745    case GL_GENERATE_MIPMAP_SGIS:
 746    case GL_TEXTURE_COMPARE_MODE_ARB:
 747    case GL_TEXTURE_COMPARE_FUNC_ARB:
 748    case GL_DEPTH_TEXTURE_MODE_ARB:
 749    case GL_TEXTURE_SRGB_DECODE_EXT:
 750    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 751    case GL_TEXTURE_SWIZZLE_R_EXT:
 752    case GL_TEXTURE_SWIZZLE_G_EXT:
 753    case GL_TEXTURE_SWIZZLE_B_EXT:
 754    case GL_TEXTURE_SWIZZLE_A_EXT:
 755       {
 756          GLint p[4];
 757          p[0] = (param > 0) ?
 758                 ((param > INT_MAX) ? INT_MAX : (GLint) (param + 0.5)) :
 759                 ((param < INT_MIN) ? INT_MIN : (GLint) (param - 0.5));
 760
 761          p[1] = p[2] = p[3] = 0;
 762          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 763       }
 764       break;
 765    default:
 766       {
 767          /* this will generate an error if pname is illegal */
 768          GLfloat p[4];
 769          p[0] = param;
 770          p[1] = p[2] = p[3] = 0.0F;
 771          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 772       }
 773    }
 774
 775    if (ctx->Driver.TexParameter && need_update) {
 776       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 777    }
 778 }
 779
 780
 781 void GLAPIENTRY
 782 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 783 {
 784    GLboolean need_update;
 785    struct gl_texture_object *texObj;
 786    GET_CURRENT_CONTEXT(ctx);
 787
 788    texObj = get_texobj(ctx, target, GL_FALSE);
 789    if (!texObj)
 790       return;
 791
 792    switch (pname) {
 793    case GL_TEXTURE_MIN_FILTER:
 794    case GL_TEXTURE_MAG_FILTER:
 795    case GL_TEXTURE_WRAP_S:
 796    case GL_TEXTURE_WRAP_T:
 797    case GL_TEXTURE_WRAP_R:
 798    case GL_TEXTURE_BASE_LEVEL:
 799    case GL_TEXTURE_MAX_LEVEL:
 800    case GL_GENERATE_MIPMAP_SGIS:
 801    case GL_TEXTURE_COMPARE_MODE_ARB:
 802    case GL_TEXTURE_COMPARE_FUNC_ARB:
 803    case GL_DEPTH_TEXTURE_MODE_ARB:
 804    case GL_TEXTURE_SRGB_DECODE_EXT:
 805    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 806       {
 807          /* convert float param to int */
 808          GLint p[4];
 809          p[0] = (GLint) params[0];
 810          p[1] = p[2] = p[3] = 0;
 811          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 812       }
 813       break;
 814    case GL_TEXTURE_CROP_RECT_OES:
 815       {
 816          /* convert float params to int */
 817          GLint iparams[4];
 818          iparams[0] = (GLint) params[0];
 819          iparams[1] = (GLint) params[1];
 820          iparams[2] = (GLint) params[2];
 821          iparams[3] = (GLint) params[3];
 822          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 823       }
 824       break;
 825    case GL_TEXTURE_SWIZZLE_R_EXT:
 826    case GL_TEXTURE_SWIZZLE_G_EXT:
 827    case GL_TEXTURE_SWIZZLE_B_EXT:
 828    case GL_TEXTURE_SWIZZLE_A_EXT:
 829    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 830       {
 831          GLint p[4] = {0, 0, 0, 0};
 832          p[0] = (GLint) params[0];
 833          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT) {
 834             p[1] = (GLint) params[1];
 835             p[2] = (GLint) params[2];
 836             p[3] = (GLint) params[3];
 837          }
 838          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 839       }
 840       break;
 841    default:
 842       /* this will generate an error if pname is illegal */
 843       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 844    }
 845
 846    if (ctx->Driver.TexParameter && need_update) {
 847       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 848    }
 849 }
 850
 851
 852 void GLAPIENTRY
 853 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 854 {
 855    GLboolean need_update;
 856    struct gl_texture_object *texObj;
 857    GET_CURRENT_CONTEXT(ctx);
 858
 859    texObj = get_texobj(ctx, target, GL_FALSE);
 860    if (!texObj)
 861       return;
 862
 863    switch (pname) {
 864    case GL_TEXTURE_MIN_LOD:
 865    case GL_TEXTURE_MAX_LOD:
 866    case GL_TEXTURE_PRIORITY:
 867    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 868    case GL_TEXTURE_LOD_BIAS:
 869    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 870       {
 871          GLfloat fparam[4];
 872          fparam[0] = (GLfloat) param;
 873          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 874          /* convert int param to float */
 875          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 876       }
 877       break;
 878    default:
 879       /* this will generate an error if pname is illegal */
 880       {
 881          GLint iparam[4];
 882          iparam[0] = param;
 883          iparam[1] = iparam[2] = iparam[3] = 0;
 884          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 885       }
 886    }
 887
 888    if (ctx->Driver.TexParameter && need_update) {
 889       GLfloat fparam = (GLfloat) param;
 890       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 891    }
 892 }
 893
 894
 895 void GLAPIENTRY
 896 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 897 {
 898    GLboolean need_update;
 899    struct gl_texture_object *texObj;
 900    GET_CURRENT_CONTEXT(ctx);
 901
 902    texObj = get_texobj(ctx, target, GL_FALSE);
 903    if (!texObj)
 904       return;
 905
 906    switch (pname) {
 907    case GL_TEXTURE_BORDER_COLOR:
 908       {
 909          /* convert int params to float */
 910          GLfloat fparams[4];
 911          fparams[0] = INT_TO_FLOAT(params[0]);
 912          fparams[1] = INT_TO_FLOAT(params[1]);
 913          fparams[2] = INT_TO_FLOAT(params[2]);
 914          fparams[3] = INT_TO_FLOAT(params[3]);
 915          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 916       }
 917       break;
 918    case GL_TEXTURE_MIN_LOD:
 919    case GL_TEXTURE_MAX_LOD:
 920    case GL_TEXTURE_PRIORITY:
 921    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 922    case GL_TEXTURE_LOD_BIAS:
 923    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 924       {
 925          /* convert int param to float */
 926          GLfloat fparams[4];
 927          fparams[0] = (GLfloat) params[0];
 928          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 929          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 930       }
 931       break;
 932    default:
 933       /* this will generate an error if pname is illegal */
 934       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 935    }
 936
 937    if (ctx->Driver.TexParameter && need_update) {
 938       GLfloat fparams[4];
 939       fparams[0] = INT_TO_FLOAT(params[0]);
 940       if (pname == GL_TEXTURE_BORDER_COLOR ||
 941           pname == GL_TEXTURE_CROP_RECT_OES) {
 942          fparams[1] = INT_TO_FLOAT(params[1]);
 943          fparams[2] = INT_TO_FLOAT(params[2]);
 944          fparams[3] = INT_TO_FLOAT(params[3]);
 945       }
 946       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 947    }
 948 }
 949
 950
 951 /**
 952  * Set tex parameter to integer value(s).  Primarily intended to set
 953  * integer-valued texture border color (for integer-valued textures).
 954  * New in GL 3.0.
 955  */
 956 void GLAPIENTRY
 957 _mesa_TexParameterIiv(GLenum target, GLenum pname, const GLint *params)
 958 {
 959    struct gl_texture_object *texObj;
 960    GET_CURRENT_CONTEXT(ctx);
 961
 962    texObj = get_texobj(ctx, target, GL_FALSE);
 963    if (!texObj)
 964       return;
 965
 966    switch (pname) {
 967    case GL_TEXTURE_BORDER_COLOR:
 968       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 969       /* set the integer-valued border color */
 970       COPY_4V(texObj->Sampler.BorderColor.i, params);
 971       break;
 972    default:
 973       _mesa_TexParameteriv(target, pname, params);
 974       break;
 975    }
 976    /* XXX no driver hook for TexParameterIiv() yet */
 977 }
 978
 979
 980 /**
 981  * Set tex parameter to unsigned integer value(s).  Primarily intended to set
 982  * uint-valued texture border color (for integer-valued textures).
 983  * New in GL 3.0
 984  */
 985 void GLAPIENTRY
 986 _mesa_TexParameterIuiv(GLenum target, GLenum pname, const GLuint *params)
 987 {
 988    struct gl_texture_object *texObj;
 989    GET_CURRENT_CONTEXT(ctx);
 990
 991    texObj = get_texobj(ctx, target, GL_FALSE);
 992    if (!texObj)
 993       return;
 994
 995    switch (pname) {
 996    case GL_TEXTURE_BORDER_COLOR:
 997       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 998       /* set the unsigned integer-valued border color */
 999       COPY_4V(texObj->Sampler.BorderColor.ui, params);
1000       break;
1001    default:
1002       _mesa_TexParameteriv(target, pname, (const GLint *) params);
1003       break;
1004    }
1005    /* XXX no driver hook for TexParameterIuiv() yet */
1006 }
1007
1008
1009 static GLboolean
1010 legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target)
1011 {
1012    switch (target) {
1013    case GL_TEXTURE_1D:
1014    case GL_PROXY_TEXTURE_1D:
1015    case GL_TEXTURE_2D:
1016    case GL_PROXY_TEXTURE_2D:
1017    case GL_TEXTURE_3D:
1018    case GL_PROXY_TEXTURE_3D:
1019       return GL_TRUE;
1020    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
1021    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
1022    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
1023    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
1024    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
1025    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
1026    case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
1027       return ctx->Extensions.ARB_texture_cube_map;
1028    case GL_TEXTURE_RECTANGLE_NV:
1029    case GL_PROXY_TEXTURE_RECTANGLE_NV:
1030       return ctx->Extensions.NV_texture_rectangle;
1031    case GL_TEXTURE_1D_ARRAY_EXT:
1032    case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
1033    case GL_TEXTURE_2D_ARRAY_EXT:
1034    case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
1035       return (ctx->Extensions.MESA_texture_array ||
1036               ctx->Extensions.EXT_texture_array);
1037    case GL_TEXTURE_BUFFER:
1038       /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
1039        * but not in earlier versions that expose ARB_texture_buffer_object.
1040        *
1041        * From the ARB_texture_buffer_object spec:
1042        * "(7) Do buffer textures support texture parameters (TexParameter) or
1043        *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
1044        *
1045        *    RESOLVED:  No. [...] Note that the spec edits above don't add
1046        *    explicit error language for any of these cases.  That is because
1047        *    each of the functions enumerate the set of valid <target>
1048        *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
1049        *    these cases means that target is not legal, and an INVALID_ENUM
1050        *    error should be generated."
1051        *
1052        * From the OpenGL 3.1 spec:
1053        * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
1054        */
1055       return ctx->API == API_OPENGL_CORE && ctx->Version >= 31;
1056    case GL_TEXTURE_2D_MULTISAMPLE:
1057    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
1058       return ctx->Extensions.ARB_texture_multisample;
1059    default:
1060       return GL_FALSE;
1061    }
1062 }
1063
1064
1065 static void
1066 get_tex_level_parameter_image(struct gl_context *ctx,
1067                               const struct gl_texture_object *texObj,
1068                               GLenum target, GLint level,
1069                               GLenum pname, GLint *params)
1070 {
1071    const struct gl_texture_image *img = NULL;
1072    gl_format texFormat;
1073
1074    img = _mesa_select_tex_image(ctx, texObj, target, level);
1075    if (!img || img->TexFormat == MESA_FORMAT_NONE) {
1076       /* undefined texture image */
1077       if (pname == GL_TEXTURE_COMPONENTS)
1078          *params = 1;
1079       else
1080          *params = 0;
1081       return;
1082    }
1083
1084    texFormat = img->TexFormat;
1085
1086    switch (pname) {
1087       case GL_TEXTURE_WIDTH:
1088          *params = img->Width;
1089          break;
1090       case GL_TEXTURE_HEIGHT:
1091          *params = img->Height;
1092          break;
1093       case GL_TEXTURE_DEPTH:
1094          *params = img->Depth;
1095          break;
1096       case GL_TEXTURE_INTERNAL_FORMAT:
1097          if (_mesa_is_format_compressed(texFormat)) {
1098             /* need to return the actual compressed format */
1099             *params = _mesa_compressed_format_to_glenum(ctx, texFormat);
1100          }
1101          else {
1102             /* If the true internal format is not compressed but the user
1103              * requested a generic compressed format, we have to return the
1104              * generic base format that matches.
1105              *
1106              * From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
1107              *
1108              *     "If no specific compressed format is available,
1109              *     internalformat is instead replaced by the corresponding base
1110              *     internal format."
1111              *
1112              * Otherwise just return the user's requested internal format
1113              */
1114             const GLenum f =
1115                _mesa_gl_compressed_format_base_format(img->InternalFormat);
1116
1117             *params = (f != 0) ? f : img->InternalFormat;
1118          }
1119          break;
1120       case GL_TEXTURE_BORDER:
1121          *params = img->Border;
1122          break;
1123       case GL_TEXTURE_RED_SIZE:
1124       case GL_TEXTURE_GREEN_SIZE:
1125       case GL_TEXTURE_BLUE_SIZE:
1126       case GL_TEXTURE_ALPHA_SIZE:
1127          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1128             *params = _mesa_get_format_bits(texFormat, pname);
1129          else
1130             *params = 0;
1131          break;
1132       case GL_TEXTURE_INTENSITY_SIZE:
1133       case GL_TEXTURE_LUMINANCE_SIZE:
1134          if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
1135             *params = _mesa_get_format_bits(texFormat, pname);
1136             if (*params == 0) {
1137                /* intensity or luminance is probably stored as RGB[A] */
1138                *params = MIN2(_mesa_get_format_bits(texFormat,
1139                                                     GL_TEXTURE_RED_SIZE),
1140                               _mesa_get_format_bits(texFormat,
1141                                                     GL_TEXTURE_GREEN_SIZE));
1142             }
1143          }
1144          else {
1145             *params = 0;
1146          }
1147          break;
1148       case GL_TEXTURE_DEPTH_SIZE_ARB:
1149          if (!ctx->Extensions.ARB_depth_texture)
1150             goto invalid_pname;
1151          *params = _mesa_get_format_bits(texFormat, pname);
1152          break;
1153       case GL_TEXTURE_STENCIL_SIZE_EXT:
1154          if (!ctx->Extensions.EXT_packed_depth_stencil &&
1155              !ctx->Extensions.ARB_framebuffer_object)
1156             goto invalid_pname;
1157          *params = _mesa_get_format_bits(texFormat, pname);
1158          break;
1159       case GL_TEXTURE_SHARED_SIZE:
1160          if (ctx->Version < 30 &&
1161              !ctx->Extensions.EXT_texture_shared_exponent)
1162             goto invalid_pname;
1163          *params = texFormat == MESA_FORMAT_RGB9_E5_FLOAT ? 5 : 0;
1164          break;
1165
1166       /* GL_ARB_texture_compression */
1167       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1168          if (_mesa_is_format_compressed(texFormat) &&
1169              !_mesa_is_proxy_texture(target)) {
1170             *params = _mesa_format_image_size(texFormat, img->Width,
1171                                               img->Height, img->Depth);
1172          }
1173          else {
1174             _mesa_error(ctx, GL_INVALID_OPERATION,
1175                         "glGetTexLevelParameter[if]v(pname)");
1176          }
1177          break;
1178       case GL_TEXTURE_COMPRESSED:
1179          *params = (GLint) _mesa_is_format_compressed(texFormat);
1180          break;
1181
1182       /* GL_ARB_texture_float */
1183       case GL_TEXTURE_RED_TYPE_ARB:
1184       case GL_TEXTURE_GREEN_TYPE_ARB:
1185       case GL_TEXTURE_BLUE_TYPE_ARB:
1186       case GL_TEXTURE_ALPHA_TYPE_ARB:
1187       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1188       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1189       case GL_TEXTURE_DEPTH_TYPE_ARB:
1190          if (!ctx->Extensions.ARB_texture_float)
1191             goto invalid_pname;
1192          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1193             *params = _mesa_get_format_datatype(texFormat);
1194          else
1195             *params = GL_NONE;
1196          break;
1197
1198       /* GL_ARB_texture_multisample */
1199       case GL_TEXTURE_SAMPLES:
1200          if (!ctx->Extensions.ARB_texture_multisample)
1201             goto invalid_pname;
1202          *params = img->NumSamples;
1203          break;
1204
1205       case GL_TEXTURE_FIXED_SAMPLE_LOCATIONS:
1206          if (!ctx->Extensions.ARB_texture_multisample)
1207             goto invalid_pname;
1208          *params = img->FixedSampleLocations;
1209          break;
1210
1211       default:
1212          goto invalid_pname;
1213    }
1214
1215    /* no error if we get here */
1216    return;
1217
1218 invalid_pname:
1219    _mesa_error(ctx, GL_INVALID_ENUM,
1220                "glGetTexLevelParameter[if]v(pname=%s)",
1221                _mesa_lookup_enum_by_nr(pname));
1222 }
1223
1224
1225 static void
1226 get_tex_level_parameter_buffer(struct gl_context *ctx,
1227                                const struct gl_texture_object *texObj,
1228                                GLenum pname, GLint *params)
1229 {
1230    const struct gl_buffer_object *bo = texObj->BufferObject;
1231    gl_format texFormat = texObj->_BufferObjectFormat;
1232    GLenum internalFormat = texObj->BufferObjectFormat;
1233    GLenum baseFormat = _mesa_get_format_base_format(texFormat);
1234
1235    if (!bo) {
1236       /* undefined texture buffer object */
1237       *params = pname == GL_TEXTURE_COMPONENTS ? 1 : 0;
1238       return;
1239    }
1240
1241    switch (pname) {
1242       case GL_TEXTURE_BUFFER_DATA_STORE_BINDING:
1243          *params = bo->Name;
1244          break;
1245       case GL_TEXTURE_WIDTH:
1246          *params = bo->Size;
1247          break;
1248       case GL_TEXTURE_HEIGHT:
1249       case GL_TEXTURE_DEPTH:
1250       case GL_TEXTURE_BORDER:
1251       case GL_TEXTURE_SHARED_SIZE:
1252       case GL_TEXTURE_COMPRESSED:
1253          *params = 0;
1254          break;
1255       case GL_TEXTURE_INTERNAL_FORMAT:
1256          *params = internalFormat;
1257          break;
1258       case GL_TEXTURE_RED_SIZE:
1259       case GL_TEXTURE_GREEN_SIZE:
1260       case GL_TEXTURE_BLUE_SIZE:
1261       case GL_TEXTURE_ALPHA_SIZE:
1262          if (_mesa_base_format_has_channel(baseFormat, pname))
1263             *params = _mesa_get_format_bits(texFormat, pname);
1264          else
1265             *params = 0;
1266          break;
1267       case GL_TEXTURE_INTENSITY_SIZE:
1268       case GL_TEXTURE_LUMINANCE_SIZE:
1269          if (_mesa_base_format_has_channel(baseFormat, pname)) {
1270             *params = _mesa_get_format_bits(texFormat, pname);
1271             if (*params == 0) {
1272                /* intensity or luminance is probably stored as RGB[A] */
1273                *params = MIN2(_mesa_get_format_bits(texFormat,
1274                                                     GL_TEXTURE_RED_SIZE),
1275                               _mesa_get_format_bits(texFormat,
1276                                                     GL_TEXTURE_GREEN_SIZE));
1277             }
1278          } else {
1279             *params = 0;
1280          }
1281          break;
1282       case GL_TEXTURE_DEPTH_SIZE_ARB:
1283       case GL_TEXTURE_STENCIL_SIZE_EXT:
1284          *params = _mesa_get_format_bits(texFormat, pname);
1285          break;
1286
1287       /* GL_ARB_texture_buffer_range */
1288       case GL_TEXTURE_BUFFER_OFFSET:
1289          if (!ctx->Extensions.ARB_texture_buffer_range)
1290             goto invalid_pname;
1291          *params = texObj->BufferOffset;
1292          break;
1293       case GL_TEXTURE_BUFFER_SIZE:
1294          if (!ctx->Extensions.ARB_texture_buffer_range)
1295             goto invalid_pname;
1296          *params = (texObj->BufferSize == -1) ? bo->Size : texObj->BufferSize;
1297          break;
1298
1299       /* GL_ARB_texture_compression */
1300       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1301          /* Always illegal for GL_TEXTURE_BUFFER */
1302          _mesa_error(ctx, GL_INVALID_OPERATION,
1303                      "glGetTexLevelParameter[if]v(pname)");
1304          break;
1305
1306       /* GL_ARB_texture_float */
1307       case GL_TEXTURE_RED_TYPE_ARB:
1308       case GL_TEXTURE_GREEN_TYPE_ARB:
1309       case GL_TEXTURE_BLUE_TYPE_ARB:
1310       case GL_TEXTURE_ALPHA_TYPE_ARB:
1311       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1312       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1313       case GL_TEXTURE_DEPTH_TYPE_ARB:
1314          if (!ctx->Extensions.ARB_texture_float)
1315             goto invalid_pname;
1316          if (_mesa_base_format_has_channel(baseFormat, pname))
1317             *params = _mesa_get_format_datatype(texFormat);
1318          else
1319             *params = GL_NONE;
1320          break;
1321
1322       default:
1323          goto invalid_pname;
1324    }
1325
1326    /* no error if we get here */
1327    return;
1328
1329 invalid_pname:
1330    _mesa_error(ctx, GL_INVALID_ENUM,
1331                "glGetTexLevelParameter[if]v(pname=%s)",
1332                _mesa_lookup_enum_by_nr(pname));
1333 }
1334
1335
1336 void GLAPIENTRY
1337 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
1338                               GLenum pname, GLfloat *params )
1339 {
1340    GLint iparam;
1341    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
1342    *params = (GLfloat) iparam;
1343 }
1344
1345
1346 void GLAPIENTRY
1347 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
1348                               GLenum pname, GLint *params )
1349 {
1350    const struct gl_texture_unit *texUnit;
1351    struct gl_texture_object *texObj;
1352    GLint maxLevels;
1353    GET_CURRENT_CONTEXT(ctx);
1354
1355    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
1356       _mesa_error(ctx, GL_INVALID_OPERATION,
1357                   "glGetTexLevelParameteriv(current unit)");
1358       return;
1359    }
1360
1361    texUnit = _mesa_get_current_tex_unit(ctx);
1362
1363    if (!legal_get_tex_level_parameter_target(ctx, target)) {
1364       _mesa_error(ctx, GL_INVALID_ENUM,
1365                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
1366       return;
1367    }
1368
1369    maxLevels = _mesa_max_texture_levels(ctx, target);
1370    assert(maxLevels != 0);
1371
1372    if (level < 0 || level >= maxLevels) {
1373       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
1374       return;
1375    }
1376
1377    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1378
1379    if (target == GL_TEXTURE_BUFFER)
1380       get_tex_level_parameter_buffer(ctx, texObj, pname, params);
1381    else
1382       get_tex_level_parameter_image(ctx, texObj, target, level, pname, params);
1383 }
1384
1385
1386 void GLAPIENTRY
1387 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
1388 {
1389    struct gl_texture_object *obj;
1390    GET_CURRENT_CONTEXT(ctx);
1391
1392    obj = get_texobj(ctx, target, GL_TRUE);
1393    if (!obj)
1394       return;
1395
1396    _mesa_lock_texture(ctx, obj);
1397    switch (pname) {
1398       case GL_TEXTURE_MAG_FILTER:
1399          *params = ENUM_TO_FLOAT(obj->Sampler.MagFilter);
1400          break;
1401       case GL_TEXTURE_MIN_FILTER:
1402          *params = ENUM_TO_FLOAT(obj->Sampler.MinFilter);
1403          break;
1404       case GL_TEXTURE_WRAP_S:
1405          *params = ENUM_TO_FLOAT(obj->Sampler.WrapS);
1406          break;
1407       case GL_TEXTURE_WRAP_T:
1408          *params = ENUM_TO_FLOAT(obj->Sampler.WrapT);
1409          break;
1410       case GL_TEXTURE_WRAP_R:
1411          *params = ENUM_TO_FLOAT(obj->Sampler.WrapR);
1412          break;
1413       case GL_TEXTURE_BORDER_COLOR:
1414          if (!_mesa_is_desktop_gl(ctx))
1415             goto invalid_pname;
1416
1417          if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
1418             _mesa_update_state_locked(ctx);
1419          if (_mesa_get_clamp_fragment_color(ctx)) {
1420             params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1421             params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1422             params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1423             params[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1424          }
1425          else {
1426             params[0] = obj->Sampler.BorderColor.f[0];
1427             params[1] = obj->Sampler.BorderColor.f[1];
1428             params[2] = obj->Sampler.BorderColor.f[2];
1429             params[3] = obj->Sampler.BorderColor.f[3];
1430          }
1431          break;
1432       case GL_TEXTURE_RESIDENT:
1433          if (ctx->API != API_OPENGL_COMPAT)
1434             goto invalid_pname;
1435
1436          *params = 1.0F;
1437          break;
1438       case GL_TEXTURE_PRIORITY:
1439          if (ctx->API != API_OPENGL_COMPAT)
1440             goto invalid_pname;
1441
1442          *params = obj->Priority;
1443          break;
1444       case GL_TEXTURE_MIN_LOD:
1445          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1446             goto invalid_pname;
1447
1448          *params = obj->Sampler.MinLod;
1449          break;
1450       case GL_TEXTURE_MAX_LOD:
1451          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1452             goto invalid_pname;
1453
1454          *params = obj->Sampler.MaxLod;
1455          break;
1456       case GL_TEXTURE_BASE_LEVEL:
1457          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1458             goto invalid_pname;
1459
1460          *params = (GLfloat) obj->BaseLevel;
1461          break;
1462       case GL_TEXTURE_MAX_LEVEL:
1463          *params = (GLfloat) obj->MaxLevel;
1464          break;
1465       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1466          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1467             goto invalid_pname;
1468          *params = obj->Sampler.MaxAnisotropy;
1469          break;
1470       case GL_GENERATE_MIPMAP_SGIS:
1471          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1472             goto invalid_pname;
1473
1474          *params = (GLfloat) obj->GenerateMipmap;
1475          break;
1476       case GL_TEXTURE_COMPARE_MODE_ARB:
1477          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1478              && !_mesa_is_gles3(ctx))
1479             goto invalid_pname;
1480          *params = (GLfloat) obj->Sampler.CompareMode;
1481          break;
1482       case GL_TEXTURE_COMPARE_FUNC_ARB:
1483          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1484              && !_mesa_is_gles3(ctx))
1485             goto invalid_pname;
1486          *params = (GLfloat) obj->Sampler.CompareFunc;
1487          break;
1488       case GL_DEPTH_TEXTURE_MODE_ARB:
1489          /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has
1490           * never existed in OpenGL ES.
1491           */
1492          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1493             goto invalid_pname;
1494          *params = (GLfloat) obj->DepthMode;
1495          break;
1496       case GL_TEXTURE_LOD_BIAS:
1497          if (ctx->API != API_OPENGL_COMPAT)
1498             goto invalid_pname;
1499
1500          *params = obj->Sampler.LodBias;
1501          break;
1502       case GL_TEXTURE_CROP_RECT_OES:
1503          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1504             goto invalid_pname;
1505
1506          params[0] = (GLfloat) obj->CropRect[0];
1507          params[1] = (GLfloat) obj->CropRect[1];
1508          params[2] = (GLfloat) obj->CropRect[2];
1509          params[3] = (GLfloat) obj->CropRect[3];
1510          break;
1511
1512       case GL_TEXTURE_SWIZZLE_R_EXT:
1513       case GL_TEXTURE_SWIZZLE_G_EXT:
1514       case GL_TEXTURE_SWIZZLE_B_EXT:
1515       case GL_TEXTURE_SWIZZLE_A_EXT:
1516          if ((!_mesa_is_desktop_gl(ctx)
1517               || !ctx->Extensions.EXT_texture_swizzle)
1518              && !_mesa_is_gles3(ctx))
1519             goto invalid_pname;
1520          *params = (GLfloat) obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1521          break;
1522
1523       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1524          if ((!_mesa_is_desktop_gl(ctx)
1525               || !ctx->Extensions.EXT_texture_swizzle)
1526              && !_mesa_is_gles3(ctx)) {
1527             goto invalid_pname;
1528          }
1529          else {
1530             GLuint comp;
1531             for (comp = 0; comp < 4; comp++) {
1532                params[comp] = (GLfloat) obj->Swizzle[comp];
1533             }
1534          }
1535          break;
1536
1537       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1538          if (!_mesa_is_desktop_gl(ctx)
1539              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1540             goto invalid_pname;
1541          *params = (GLfloat) obj->Sampler.CubeMapSeamless;
1542          break;
1543
1544       case GL_TEXTURE_IMMUTABLE_FORMAT:
1545          if (!ctx->Extensions.ARB_texture_storage)
1546             goto invalid_pname;
1547          *params = (GLfloat) obj->Immutable;
1548          break;
1549
1550       case GL_TEXTURE_IMMUTABLE_LEVELS:
1551          if (!_mesa_is_gles3(ctx))
1552             goto invalid_pname;
1553          *params = (GLfloat) obj->ImmutableLevels;
1554          break;
1555
1556       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1557          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1558             goto invalid_pname;
1559          *params = obj->RequiredTextureImageUnits;
1560          break;
1561
1562       case GL_TEXTURE_SRGB_DECODE_EXT:
1563          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1564             goto invalid_pname;
1565          *params = (GLfloat) obj->Sampler.sRGBDecode;
1566          break;
1567
1568       default:
1569          goto invalid_pname;
1570    }
1571
1572    /* no error if we get here */
1573    _mesa_unlock_texture(ctx, obj);
1574    return;
1575
1576 invalid_pname:
1577    _mesa_unlock_texture(ctx, obj);
1578    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname);
1579 }
1580
1581
1582 void GLAPIENTRY
1583 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1584 {
1585    struct gl_texture_object *obj;
1586    GET_CURRENT_CONTEXT(ctx);
1587
1588    obj = get_texobj(ctx, target, GL_TRUE);
1589    if (!obj)
1590       return;
1591
1592    _mesa_lock_texture(ctx, obj);
1593    switch (pname) {
1594       case GL_TEXTURE_MAG_FILTER:
1595          *params = (GLint) obj->Sampler.MagFilter;
1596          break;
1597       case GL_TEXTURE_MIN_FILTER:
1598          *params = (GLint) obj->Sampler.MinFilter;
1599          break;
1600       case GL_TEXTURE_WRAP_S:
1601          *params = (GLint) obj->Sampler.WrapS;
1602          break;
1603       case GL_TEXTURE_WRAP_T:
1604          *params = (GLint) obj->Sampler.WrapT;
1605          break;
1606       case GL_TEXTURE_WRAP_R:
1607          *params = (GLint) obj->Sampler.WrapR;
1608          break;
1609       case GL_TEXTURE_BORDER_COLOR:
1610          if (!_mesa_is_desktop_gl(ctx))
1611             goto invalid_pname;
1612
1613          {
1614             GLfloat b[4];
1615             b[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1616             b[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1617             b[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1618             b[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1619             params[0] = FLOAT_TO_INT(b[0]);
1620             params[1] = FLOAT_TO_INT(b[1]);
1621             params[2] = FLOAT_TO_INT(b[2]);
1622             params[3] = FLOAT_TO_INT(b[3]);
1623          }
1624          break;
1625       case GL_TEXTURE_RESIDENT:
1626          if (ctx->API != API_OPENGL_COMPAT)
1627             goto invalid_pname;
1628
1629          *params = 1;
1630          break;
1631       case GL_TEXTURE_PRIORITY:
1632          if (ctx->API != API_OPENGL_COMPAT)
1633             goto invalid_pname;
1634
1635          *params = FLOAT_TO_INT(obj->Priority);
1636          break;
1637       case GL_TEXTURE_MIN_LOD:
1638          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1639             goto invalid_pname;
1640
1641          *params = (GLint) obj->Sampler.MinLod;
1642          break;
1643       case GL_TEXTURE_MAX_LOD:
1644          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1645             goto invalid_pname;
1646
1647          *params = (GLint) obj->Sampler.MaxLod;
1648          break;
1649       case GL_TEXTURE_BASE_LEVEL:
1650          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1651             goto invalid_pname;
1652
1653          *params = obj->BaseLevel;
1654          break;
1655       case GL_TEXTURE_MAX_LEVEL:
1656          *params = obj->MaxLevel;
1657          break;
1658       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1659          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1660             goto invalid_pname;
1661          *params = (GLint) obj->Sampler.MaxAnisotropy;
1662          break;
1663       case GL_GENERATE_MIPMAP_SGIS:
1664          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1665             goto invalid_pname;
1666
1667          *params = (GLint) obj->GenerateMipmap;
1668          break;
1669       case GL_TEXTURE_COMPARE_MODE_ARB:
1670          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1671              && !_mesa_is_gles3(ctx))
1672             goto invalid_pname;
1673          *params = (GLint) obj->Sampler.CompareMode;
1674          break;
1675       case GL_TEXTURE_COMPARE_FUNC_ARB:
1676          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1677              && !_mesa_is_gles3(ctx))
1678             goto invalid_pname;
1679          *params = (GLint) obj->Sampler.CompareFunc;
1680          break;
1681       case GL_DEPTH_TEXTURE_MODE_ARB:
1682          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1683             goto invalid_pname;
1684          *params = (GLint) obj->DepthMode;
1685          break;
1686       case GL_TEXTURE_LOD_BIAS:
1687          if (ctx->API != API_OPENGL_COMPAT)
1688             goto invalid_pname;
1689
1690          *params = (GLint) obj->Sampler.LodBias;
1691          break;
1692       case GL_TEXTURE_CROP_RECT_OES:
1693          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1694             goto invalid_pname;
1695
1696          params[0] = obj->CropRect[0];
1697          params[1] = obj->CropRect[1];
1698          params[2] = obj->CropRect[2];
1699          params[3] = obj->CropRect[3];
1700          break;
1701       case GL_TEXTURE_SWIZZLE_R_EXT:
1702       case GL_TEXTURE_SWIZZLE_G_EXT:
1703       case GL_TEXTURE_SWIZZLE_B_EXT:
1704       case GL_TEXTURE_SWIZZLE_A_EXT:
1705          if ((!_mesa_is_desktop_gl(ctx)
1706               || !ctx->Extensions.EXT_texture_swizzle)
1707              && !_mesa_is_gles3(ctx))
1708             goto invalid_pname;
1709          *params = obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1710          break;
1711
1712       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1713          if ((!_mesa_is_desktop_gl(ctx)
1714               || !ctx->Extensions.EXT_texture_swizzle)
1715              && !_mesa_is_gles3(ctx))
1716             goto invalid_pname;
1717          COPY_4V(params, obj->Swizzle);
1718          break;
1719
1720       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1721          if (!_mesa_is_desktop_gl(ctx)
1722              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1723             goto invalid_pname;
1724          *params = (GLint) obj->Sampler.CubeMapSeamless;
1725          break;
1726
1727       case GL_TEXTURE_IMMUTABLE_FORMAT:
1728          if (!ctx->Extensions.ARB_texture_storage)
1729             goto invalid_pname;
1730          *params = (GLint) obj->Immutable;
1731          break;
1732
1733       case GL_TEXTURE_IMMUTABLE_LEVELS:
1734          if (!_mesa_is_gles3(ctx))
1735             goto invalid_pname;
1736          *params = obj->ImmutableLevels;
1737          break;
1738
1739       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1740          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1741             goto invalid_pname;
1742          *params = obj->RequiredTextureImageUnits;
1743          break;
1744
1745       case GL_TEXTURE_SRGB_DECODE_EXT:
1746          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1747             goto invalid_pname;
1748          *params = obj->Sampler.sRGBDecode;
1749          break;
1750
1751       default:
1752          goto invalid_pname;
1753    }
1754
1755    /* no error if we get here */
1756    _mesa_unlock_texture(ctx, obj);
1757    return;
1758
1759 invalid_pname:
1760    _mesa_unlock_texture(ctx, obj);
1761    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
1762 }
1763
1764
1765 /** New in GL 3.0 */
1766 void GLAPIENTRY
1767 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1768 {
1769    struct gl_texture_object *texObj;
1770    GET_CURRENT_CONTEXT(ctx);
1771
1772    texObj = get_texobj(ctx, target, GL_TRUE);
1773    if (!texObj)
1774       return;
1775
1776    switch (pname) {
1777    case GL_TEXTURE_BORDER_COLOR:
1778       COPY_4V(params, texObj->Sampler.BorderColor.i);
1779       break;
1780    default:
1781       _mesa_GetTexParameteriv(target, pname, params);
1782    }
1783 }
1784
1785
1786 /** New in GL 3.0 */
1787 void GLAPIENTRY
1788 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1789 {
1790    struct gl_texture_object *texObj;
1791    GET_CURRENT_CONTEXT(ctx);
1792
1793    texObj = get_texobj(ctx, target, GL_TRUE);
1794    if (!texObj)
1795       return;
1796
1797    switch (pname) {
1798    case GL_TEXTURE_BORDER_COLOR:
1799       COPY_4V(params, texObj->Sampler.BorderColor.i);
1800       break;
1801    default:
1802       {
1803          GLint ip[4];
1804          _mesa_GetTexParameteriv(target, pname, ip);
1805          params[0] = ip[0];
1806          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1807              pname == GL_TEXTURE_CROP_RECT_OES) {
1808             params[1] = ip[1];
1809             params[2] = ip[2];
1810             params[3] = ip[3];
1811          }
1812       }
1813    }
1814 }