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       supported = is_desktop_gl
  88          && (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)
  89          && (target != GL_TEXTURE_RECTANGLE_NV)
  90          && (target != GL_TEXTURE_EXTERNAL_OES);
  91       break;
  92
  93    case GL_MIRROR_CLAMP_TO_EDGE_EXT:
  94       supported = is_desktop_gl
  95          && (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp || e->ARB_texture_mirror_clamp_to_edge)
  96          && (target != GL_TEXTURE_RECTANGLE_NV)
  97          && (target != GL_TEXTURE_EXTERNAL_OES);
  98       break;
  99
 100    case GL_MIRROR_CLAMP_TO_BORDER_EXT:
 101       supported = is_desktop_gl && e->EXT_texture_mirror_clamp
 102          && (target != GL_TEXTURE_RECTANGLE_NV)
 103          && (target != GL_TEXTURE_EXTERNAL_OES);
 104       break;
 105
 106    default:
 107       supported = false;
 108       break;
 109    }
 110
 111    if (!supported)
 112       _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)", wrap );
 113
 114    return supported;
 115 }
 116
 117
 118 /**
 119  * Get current texture object for given target.
 120  * Return NULL if any error (and record the error).
 121  * Note that this is different from _mesa_get_current_tex_object() in that
 122  * proxy targets are not accepted.
 123  * Only the glGetTexLevelParameter() functions accept proxy targets.
 124  */
 125 static struct gl_texture_object *
 126 get_texobj(struct gl_context *ctx, GLenum target, GLboolean get)
 127 {
 128    struct gl_texture_unit *texUnit;
 129    int targetIndex;
 130
 131    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
 132       _mesa_error(ctx, GL_INVALID_OPERATION,
 133                   "gl%sTexParameter(current unit)", get ? "Get" : "");
 134       return NULL;
 135    }
 136
 137    texUnit = _mesa_get_current_tex_unit(ctx);
 138
 139    targetIndex = _mesa_tex_target_to_index(ctx, target);
 140    if (targetIndex < 0 || targetIndex == TEXTURE_BUFFER_INDEX) {
 141       _mesa_error(ctx, GL_INVALID_ENUM,
 142                   "gl%sTexParameter(target)", get ? "Get" : "");
 143       return NULL;
 144    }
 145    assert(targetIndex < NUM_TEXTURE_TARGETS);
 146
 147    return texUnit->CurrentTex[targetIndex];
 148 }
 149
 150
 151 /**
 152  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 153  * \return -1 if error.
 154  */
 155 static GLint
 156 comp_to_swizzle(GLenum comp)
 157 {
 158    switch (comp) {
 159    case GL_RED:
 160       return SWIZZLE_X;
 161    case GL_GREEN:
 162       return SWIZZLE_Y;
 163    case GL_BLUE:
 164       return SWIZZLE_Z;
 165    case GL_ALPHA:
 166       return SWIZZLE_W;
 167    case GL_ZERO:
 168       return SWIZZLE_ZERO;
 169    case GL_ONE:
 170       return SWIZZLE_ONE;
 171    default:
 172       return -1;
 173    }
 174 }
 175
 176
 177 static void
 178 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 179 {
 180    ASSERT(comp < 4);
 181    ASSERT(swz <= SWIZZLE_NIL);
 182    {
 183       GLuint mask = 0x7 << (3 * comp);
 184       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 185       *swizzle = s;
 186    }
 187 }
 188
 189
 190 /**
 191  * This is called just prior to changing any texture object state which
 192  * will not effect texture completeness.
 193  */
 194 static inline void
 195 flush(struct gl_context *ctx)
 196 {
 197    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 198 }
 199
 200
 201 /**
 202  * This is called just prior to changing any texture object state which
 203  * can effect texture completeness (texture base level, max level).
 204  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 205  * state flag and then mark the texture object as 'incomplete' so that any
 206  * per-texture derived state gets recomputed.
 207  */
 208 static inline void
 209 incomplete(struct gl_context *ctx, struct gl_texture_object *texObj)
 210 {
 211    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 212    _mesa_dirty_texobj(ctx, texObj);
 213 }
 214
 215
 216 static GLboolean
 217 target_allows_setting_sampler_parameters(GLenum target)
 218 {
 219    switch (target) {
 220    case GL_TEXTURE_2D_MULTISAMPLE:
 221    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 222       return GL_FALSE;
 223
 224    default:
 225       return GL_TRUE;
 226    }
 227 }
 228
 229
 230 /**
 231  * Set an integer-valued texture parameter
 232  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 233  */
 234 static GLboolean
 235 set_tex_parameteri(struct gl_context *ctx,
 236                    struct gl_texture_object *texObj,
 237                    GLenum pname, const GLint *params)
 238 {
 239    switch (pname) {
 240    case GL_TEXTURE_MIN_FILTER:
 241       if (!target_allows_setting_sampler_parameters(texObj->Target))
 242          goto invalid_operation;
 243
 244       if (texObj->Sampler.MinFilter == params[0])
 245          return GL_FALSE;
 246       switch (params[0]) {
 247       case GL_NEAREST:
 248       case GL_LINEAR:
 249          flush(ctx);
 250          texObj->Sampler.MinFilter = params[0];
 251          return GL_TRUE;
 252       case GL_NEAREST_MIPMAP_NEAREST:
 253       case GL_LINEAR_MIPMAP_NEAREST:
 254       case GL_NEAREST_MIPMAP_LINEAR:
 255       case GL_LINEAR_MIPMAP_LINEAR:
 256          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV &&
 257              texObj->Target != GL_TEXTURE_EXTERNAL_OES) {
 258             flush(ctx);
 259             texObj->Sampler.MinFilter = params[0];
 260             return GL_TRUE;
 261          }
 262          /* fall-through */
 263       default:
 264          goto invalid_param;
 265       }
 266       return GL_FALSE;
 267
 268    case GL_TEXTURE_MAG_FILTER:
 269       if (!target_allows_setting_sampler_parameters(texObj->Target))
 270          goto invalid_operation;
 271
 272       if (texObj->Sampler.MagFilter == params[0])
 273          return GL_FALSE;
 274       switch (params[0]) {
 275       case GL_NEAREST:
 276       case GL_LINEAR:
 277          flush(ctx); /* does not effect completeness */
 278          texObj->Sampler.MagFilter = params[0];
 279          return GL_TRUE;
 280       default:
 281          goto invalid_param;
 282       }
 283       return GL_FALSE;
 284
 285    case GL_TEXTURE_WRAP_S:
 286       if (!target_allows_setting_sampler_parameters(texObj->Target))
 287          goto invalid_operation;
 288
 289       if (texObj->Sampler.WrapS == params[0])
 290          return GL_FALSE;
 291       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 292          flush(ctx);
 293          texObj->Sampler.WrapS = params[0];
 294          return GL_TRUE;
 295       }
 296       return GL_FALSE;
 297
 298    case GL_TEXTURE_WRAP_T:
 299       if (!target_allows_setting_sampler_parameters(texObj->Target))
 300          goto invalid_operation;
 301
 302       if (texObj->Sampler.WrapT == params[0])
 303          return GL_FALSE;
 304       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 305          flush(ctx);
 306          texObj->Sampler.WrapT = params[0];
 307          return GL_TRUE;
 308       }
 309       return GL_FALSE;
 310
 311    case GL_TEXTURE_WRAP_R:
 312       if (!target_allows_setting_sampler_parameters(texObj->Target))
 313          goto invalid_operation;
 314
 315       if (texObj->Sampler.WrapR == params[0])
 316          return GL_FALSE;
 317       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 318          flush(ctx);
 319          texObj->Sampler.WrapR = params[0];
 320          return GL_TRUE;
 321       }
 322       return GL_FALSE;
 323
 324    case GL_TEXTURE_BASE_LEVEL:
 325       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 326          goto invalid_pname;
 327
 328       if (texObj->BaseLevel == params[0])
 329          return GL_FALSE;
 330
 331       if ((texObj->Target == GL_TEXTURE_2D_MULTISAMPLE ||
 332            texObj->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) && params[0] != 0)
 333          goto invalid_operation;
 334
 335       if (params[0] < 0 ||
 336           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 337          _mesa_error(ctx, GL_INVALID_VALUE,
 338                      "glTexParameter(param=%d)", params[0]);
 339          return GL_FALSE;
 340       }
 341       incomplete(ctx, texObj);
 342
 343       /** See note about ARB_texture_storage below */
 344       if (texObj->Immutable)
 345          texObj->BaseLevel = MIN2(texObj->ImmutableLevels - 1, params[0]);
 346       else
 347          texObj->BaseLevel = params[0];
 348
 349       return GL_TRUE;
 350
 351    case GL_TEXTURE_MAX_LEVEL:
 352       if (texObj->MaxLevel == params[0])
 353          return GL_FALSE;
 354
 355       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 356          _mesa_error(ctx, GL_INVALID_VALUE,
 357                      "glTexParameter(param=%d)", params[0]);
 358          return GL_FALSE;
 359       }
 360       incomplete(ctx, texObj);
 361
 362       /** From ARB_texture_storage:
 363        * However, if TEXTURE_IMMUTABLE_FORMAT is TRUE, then level_base is
 364        * clamped to the range [0, <levels> - 1] and level_max is then clamped to
 365        * the range [level_base, <levels> - 1], where <levels> is the parameter
 366        * passed the call to TexStorage* for the texture object.
 367        */
 368       if (texObj->Immutable)
 369           texObj->MaxLevel = CLAMP(params[0], texObj->BaseLevel,
 370                                    texObj->ImmutableLevels - 1);
 371       else
 372          texObj->MaxLevel = params[0];
 373
 374       return GL_TRUE;
 375
 376    case GL_GENERATE_MIPMAP_SGIS:
 377       if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 378          goto invalid_pname;
 379
 380       if (params[0] && texObj->Target == GL_TEXTURE_EXTERNAL_OES)
 381          goto invalid_param;
 382       if (texObj->GenerateMipmap != params[0]) {
 383          /* no flush() */
 384          texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 385          return GL_TRUE;
 386       }
 387       return GL_FALSE;
 388
 389    case GL_TEXTURE_COMPARE_MODE_ARB:
 390       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 391           || _mesa_is_gles3(ctx)) {
 392
 393          if (!target_allows_setting_sampler_parameters(texObj->Target))
 394             goto invalid_operation;
 395
 396          if (texObj->Sampler.CompareMode == params[0])
 397             return GL_FALSE;
 398          if (params[0] == GL_NONE ||
 399              params[0] == GL_COMPARE_R_TO_TEXTURE_ARB) {
 400             flush(ctx);
 401             texObj->Sampler.CompareMode = params[0];
 402             return GL_TRUE;
 403          }
 404          goto invalid_param;
 405       }
 406       goto invalid_pname;
 407
 408    case GL_TEXTURE_COMPARE_FUNC_ARB:
 409       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 410           || _mesa_is_gles3(ctx)) {
 411
 412          if (!target_allows_setting_sampler_parameters(texObj->Target))
 413             goto invalid_operation;
 414
 415          if (texObj->Sampler.CompareFunc == params[0])
 416             return GL_FALSE;
 417          switch (params[0]) {
 418          case GL_LEQUAL:
 419          case GL_GEQUAL:
 420          case GL_EQUAL:
 421          case GL_NOTEQUAL:
 422          case GL_LESS:
 423          case GL_GREATER:
 424          case GL_ALWAYS:
 425          case GL_NEVER:
 426             flush(ctx);
 427             texObj->Sampler.CompareFunc = params[0];
 428             return GL_TRUE;
 429          default:
 430             goto invalid_param;
 431          }
 432       }
 433       goto invalid_pname;
 434
 435    case GL_DEPTH_TEXTURE_MODE_ARB:
 436       /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has never
 437        * existed in OpenGL ES.
 438        */
 439       if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.ARB_depth_texture) {
 440          if (texObj->DepthMode == params[0])
 441             return GL_FALSE;
 442          if (params[0] == GL_LUMINANCE ||
 443              params[0] == GL_INTENSITY ||
 444              params[0] == GL_ALPHA ||
 445              (ctx->Extensions.ARB_texture_rg && params[0] == GL_RED)) {
 446             flush(ctx);
 447             texObj->DepthMode = params[0];
 448             return GL_TRUE;
 449          }
 450          goto invalid_param;
 451       }
 452       goto invalid_pname;
 453
 454    case GL_TEXTURE_CROP_RECT_OES:
 455       if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
 456          goto invalid_pname;
 457
 458       texObj->CropRect[0] = params[0];
 459       texObj->CropRect[1] = params[1];
 460       texObj->CropRect[2] = params[2];
 461       texObj->CropRect[3] = params[3];
 462       return GL_TRUE;
 463
 464    case GL_TEXTURE_SWIZZLE_R_EXT:
 465    case GL_TEXTURE_SWIZZLE_G_EXT:
 466    case GL_TEXTURE_SWIZZLE_B_EXT:
 467    case GL_TEXTURE_SWIZZLE_A_EXT:
 468       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 469           || _mesa_is_gles3(ctx)) {
 470          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 471          const GLint swz = comp_to_swizzle(params[0]);
 472          if (swz < 0) {
 473             _mesa_error(ctx, GL_INVALID_OPERATION,
 474                         "glTexParameter(swizzle 0x%x)", params[0]);
 475             return GL_FALSE;
 476          }
 477          ASSERT(comp < 4);
 478
 479          flush(ctx);
 480          texObj->Swizzle[comp] = params[0];
 481          set_swizzle_component(&texObj->_Swizzle, comp, swz);
 482          return GL_TRUE;
 483       }
 484       goto invalid_pname;
 485
 486    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 487       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 488           || _mesa_is_gles3(ctx)) {
 489          GLuint comp;
 490          flush(ctx);
 491          for (comp = 0; comp < 4; comp++) {
 492             const GLint swz = comp_to_swizzle(params[comp]);
 493             if (swz >= 0) {
 494                texObj->Swizzle[comp] = params[comp];
 495                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 496             }
 497             else {
 498                _mesa_error(ctx, GL_INVALID_OPERATION,
 499                            "glTexParameter(swizzle 0x%x)", params[comp]);
 500                return GL_FALSE;
 501             }
 502          }
 503          return GL_TRUE;
 504       }
 505       goto invalid_pname;
 506
 507    case GL_TEXTURE_SRGB_DECODE_EXT:
 508       if (_mesa_is_desktop_gl(ctx)
 509           && ctx->Extensions.EXT_texture_sRGB_decode) {
 510          GLenum decode = params[0];
 511
 512          if (!target_allows_setting_sampler_parameters(texObj->Target))
 513             goto invalid_operation;
 514
 515          if (decode == GL_DECODE_EXT || decode == GL_SKIP_DECODE_EXT) {
 516             if (texObj->Sampler.sRGBDecode != decode) {
 517                flush(ctx);
 518                texObj->Sampler.sRGBDecode = decode;
 519             }
 520             return GL_TRUE;
 521          }
 522       }
 523       goto invalid_pname;
 524
 525    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 526       if (_mesa_is_desktop_gl(ctx)
 527           && ctx->Extensions.AMD_seamless_cubemap_per_texture) {
 528          GLenum param = params[0];
 529
 530          if (!target_allows_setting_sampler_parameters(texObj->Target))
 531             goto invalid_operation;
 532
 533          if (param != GL_TRUE && param != GL_FALSE) {
 534             goto invalid_param;
 535          }
 536          if (param != texObj->Sampler.CubeMapSeamless) {
 537             flush(ctx);
 538             texObj->Sampler.CubeMapSeamless = param;
 539          }
 540          return GL_TRUE;
 541       }
 542       goto invalid_pname;
 543
 544    default:
 545       goto invalid_pname;
 546    }
 547
 548 invalid_pname:
 549    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 550                _mesa_lookup_enum_by_nr(pname));
 551    return GL_FALSE;
 552
 553 invalid_param:
 554    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param=%s)",
 555                _mesa_lookup_enum_by_nr(params[0]));
 556    return GL_FALSE;
 557
 558 invalid_operation:
 559    _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(pname=%s)",
 560                _mesa_lookup_enum_by_nr(pname));
 561    return GL_FALSE;
 562 }
 563
 564
 565 /**
 566  * Set a float-valued texture parameter
 567  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 568  */
 569 static GLboolean
 570 set_tex_parameterf(struct gl_context *ctx,
 571                    struct gl_texture_object *texObj,
 572                    GLenum pname, const GLfloat *params)
 573 {
 574    switch (pname) {
 575    case GL_TEXTURE_MIN_LOD:
 576       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 577          goto invalid_pname;
 578
 579       if (!target_allows_setting_sampler_parameters(texObj->Target))
 580          goto invalid_operation;
 581
 582       if (texObj->Sampler.MinLod == params[0])
 583          return GL_FALSE;
 584       flush(ctx);
 585       texObj->Sampler.MinLod = params[0];
 586       return GL_TRUE;
 587
 588    case GL_TEXTURE_MAX_LOD:
 589       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 590          goto invalid_pname;
 591
 592       if (!target_allows_setting_sampler_parameters(texObj->Target))
 593          goto invalid_operation;
 594
 595       if (texObj->Sampler.MaxLod == params[0])
 596          return GL_FALSE;
 597       flush(ctx);
 598       texObj->Sampler.MaxLod = params[0];
 599       return GL_TRUE;
 600
 601    case GL_TEXTURE_PRIORITY:
 602       if (ctx->API != API_OPENGL_COMPAT)
 603          goto invalid_pname;
 604
 605       flush(ctx);
 606       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 607       return GL_TRUE;
 608
 609    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 610       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 611          if (!target_allows_setting_sampler_parameters(texObj->Target))
 612             goto invalid_operation;
 613
 614          if (texObj->Sampler.MaxAnisotropy == params[0])
 615             return GL_FALSE;
 616          if (params[0] < 1.0) {
 617             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 618             return GL_FALSE;
 619          }
 620          flush(ctx);
 621          /* clamp to max, that's what NVIDIA does */
 622          texObj->Sampler.MaxAnisotropy = MIN2(params[0],
 623                                       ctx->Const.MaxTextureMaxAnisotropy);
 624          return GL_TRUE;
 625       }
 626       else {
 627          static GLuint count = 0;
 628          if (count++ < 10)
 629             goto invalid_pname;
 630       }
 631       return GL_FALSE;
 632
 633    case GL_TEXTURE_LOD_BIAS:
 634       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias. */
 635       if (_mesa_is_gles(ctx))
 636          goto invalid_pname;
 637
 638       if (!target_allows_setting_sampler_parameters(texObj->Target))
 639          goto invalid_operation;
 640
 641       if (texObj->Sampler.LodBias != params[0]) {
 642          flush(ctx);
 643          texObj->Sampler.LodBias = params[0];
 644          return GL_TRUE;
 645       }
 646       break;
 647
 648    case GL_TEXTURE_BORDER_COLOR:
 649       if (!_mesa_is_desktop_gl(ctx))
 650          goto invalid_pname;
 651
 652       if (!target_allows_setting_sampler_parameters(texObj->Target))
 653          goto invalid_operation;
 654
 655       flush(ctx);
 656       /* ARB_texture_float disables clamping */
 657       if (ctx->Extensions.ARB_texture_float) {
 658          texObj->Sampler.BorderColor.f[RCOMP] = params[0];
 659          texObj->Sampler.BorderColor.f[GCOMP] = params[1];
 660          texObj->Sampler.BorderColor.f[BCOMP] = params[2];
 661          texObj->Sampler.BorderColor.f[ACOMP] = params[3];
 662       } else {
 663          texObj->Sampler.BorderColor.f[RCOMP] = CLAMP(params[0], 0.0F, 1.0F);
 664          texObj->Sampler.BorderColor.f[GCOMP] = CLAMP(params[1], 0.0F, 1.0F);
 665          texObj->Sampler.BorderColor.f[BCOMP] = CLAMP(params[2], 0.0F, 1.0F);
 666          texObj->Sampler.BorderColor.f[ACOMP] = CLAMP(params[3], 0.0F, 1.0F);
 667       }
 668       return GL_TRUE;
 669
 670    default:
 671       goto invalid_pname;
 672    }
 673    return GL_FALSE;
 674
 675 invalid_pname:
 676    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 677                _mesa_lookup_enum_by_nr(pname));
 678    return GL_FALSE;
 679
 680 invalid_operation:
 681    _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(pname=%s)",
 682                _mesa_lookup_enum_by_nr(pname));
 683    return GL_FALSE;
 684 }
 685
 686
 687 void GLAPIENTRY
 688 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 689 {
 690    GLboolean need_update;
 691    struct gl_texture_object *texObj;
 692    GET_CURRENT_CONTEXT(ctx);
 693
 694    texObj = get_texobj(ctx, target, GL_FALSE);
 695    if (!texObj)
 696       return;
 697
 698    switch (pname) {
 699    case GL_TEXTURE_MIN_FILTER:
 700    case GL_TEXTURE_MAG_FILTER:
 701    case GL_TEXTURE_WRAP_S:
 702    case GL_TEXTURE_WRAP_T:
 703    case GL_TEXTURE_WRAP_R:
 704    case GL_TEXTURE_BASE_LEVEL:
 705    case GL_TEXTURE_MAX_LEVEL:
 706    case GL_GENERATE_MIPMAP_SGIS:
 707    case GL_TEXTURE_COMPARE_MODE_ARB:
 708    case GL_TEXTURE_COMPARE_FUNC_ARB:
 709    case GL_DEPTH_TEXTURE_MODE_ARB:
 710    case GL_TEXTURE_SRGB_DECODE_EXT:
 711    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 712    case GL_TEXTURE_SWIZZLE_R_EXT:
 713    case GL_TEXTURE_SWIZZLE_G_EXT:
 714    case GL_TEXTURE_SWIZZLE_B_EXT:
 715    case GL_TEXTURE_SWIZZLE_A_EXT:
 716       {
 717          GLint p[4];
 718          p[0] = (param > 0) ?
 719                 ((param > INT_MAX) ? INT_MAX : (GLint) (param + 0.5)) :
 720                 ((param < INT_MIN) ? INT_MIN : (GLint) (param - 0.5));
 721
 722          p[1] = p[2] = p[3] = 0;
 723          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 724       }
 725       break;
 726    default:
 727       {
 728          /* this will generate an error if pname is illegal */
 729          GLfloat p[4];
 730          p[0] = param;
 731          p[1] = p[2] = p[3] = 0.0F;
 732          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 733       }
 734    }
 735
 736    if (ctx->Driver.TexParameter && need_update) {
 737       ctx->Driver.TexParameter(ctx, texObj, pname, &param);
 738    }
 739 }
 740
 741
 742 void GLAPIENTRY
 743 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 744 {
 745    GLboolean need_update;
 746    struct gl_texture_object *texObj;
 747    GET_CURRENT_CONTEXT(ctx);
 748
 749    texObj = get_texobj(ctx, target, GL_FALSE);
 750    if (!texObj)
 751       return;
 752
 753    switch (pname) {
 754    case GL_TEXTURE_MIN_FILTER:
 755    case GL_TEXTURE_MAG_FILTER:
 756    case GL_TEXTURE_WRAP_S:
 757    case GL_TEXTURE_WRAP_T:
 758    case GL_TEXTURE_WRAP_R:
 759    case GL_TEXTURE_BASE_LEVEL:
 760    case GL_TEXTURE_MAX_LEVEL:
 761    case GL_GENERATE_MIPMAP_SGIS:
 762    case GL_TEXTURE_COMPARE_MODE_ARB:
 763    case GL_TEXTURE_COMPARE_FUNC_ARB:
 764    case GL_DEPTH_TEXTURE_MODE_ARB:
 765    case GL_TEXTURE_SRGB_DECODE_EXT:
 766    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 767       {
 768          /* convert float param to int */
 769          GLint p[4];
 770          p[0] = (GLint) params[0];
 771          p[1] = p[2] = p[3] = 0;
 772          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 773       }
 774       break;
 775    case GL_TEXTURE_CROP_RECT_OES:
 776       {
 777          /* convert float params to int */
 778          GLint iparams[4];
 779          iparams[0] = (GLint) params[0];
 780          iparams[1] = (GLint) params[1];
 781          iparams[2] = (GLint) params[2];
 782          iparams[3] = (GLint) params[3];
 783          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 784       }
 785       break;
 786    case GL_TEXTURE_SWIZZLE_R_EXT:
 787    case GL_TEXTURE_SWIZZLE_G_EXT:
 788    case GL_TEXTURE_SWIZZLE_B_EXT:
 789    case GL_TEXTURE_SWIZZLE_A_EXT:
 790    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 791       {
 792          GLint p[4] = {0, 0, 0, 0};
 793          p[0] = (GLint) params[0];
 794          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT) {
 795             p[1] = (GLint) params[1];
 796             p[2] = (GLint) params[2];
 797             p[3] = (GLint) params[3];
 798          }
 799          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 800       }
 801       break;
 802    default:
 803       /* this will generate an error if pname is illegal */
 804       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 805    }
 806
 807    if (ctx->Driver.TexParameter && need_update) {
 808       ctx->Driver.TexParameter(ctx, texObj, pname, params);
 809    }
 810 }
 811
 812
 813 void GLAPIENTRY
 814 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 815 {
 816    GLboolean need_update;
 817    struct gl_texture_object *texObj;
 818    GET_CURRENT_CONTEXT(ctx);
 819
 820    texObj = get_texobj(ctx, target, GL_FALSE);
 821    if (!texObj)
 822       return;
 823
 824    switch (pname) {
 825    case GL_TEXTURE_MIN_LOD:
 826    case GL_TEXTURE_MAX_LOD:
 827    case GL_TEXTURE_PRIORITY:
 828    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 829    case GL_TEXTURE_LOD_BIAS:
 830    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 831       {
 832          GLfloat fparam[4];
 833          fparam[0] = (GLfloat) param;
 834          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 835          /* convert int param to float */
 836          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 837       }
 838       break;
 839    default:
 840       /* this will generate an error if pname is illegal */
 841       {
 842          GLint iparam[4];
 843          iparam[0] = param;
 844          iparam[1] = iparam[2] = iparam[3] = 0;
 845          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 846       }
 847    }
 848
 849    if (ctx->Driver.TexParameter && need_update) {
 850       GLfloat fparam = (GLfloat) param;
 851       ctx->Driver.TexParameter(ctx, texObj, pname, &fparam);
 852    }
 853 }
 854
 855
 856 void GLAPIENTRY
 857 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 858 {
 859    GLboolean need_update;
 860    struct gl_texture_object *texObj;
 861    GET_CURRENT_CONTEXT(ctx);
 862
 863    texObj = get_texobj(ctx, target, GL_FALSE);
 864    if (!texObj)
 865       return;
 866
 867    switch (pname) {
 868    case GL_TEXTURE_BORDER_COLOR:
 869       {
 870          /* convert int params to float */
 871          GLfloat fparams[4];
 872          fparams[0] = INT_TO_FLOAT(params[0]);
 873          fparams[1] = INT_TO_FLOAT(params[1]);
 874          fparams[2] = INT_TO_FLOAT(params[2]);
 875          fparams[3] = INT_TO_FLOAT(params[3]);
 876          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 877       }
 878       break;
 879    case GL_TEXTURE_MIN_LOD:
 880    case GL_TEXTURE_MAX_LOD:
 881    case GL_TEXTURE_PRIORITY:
 882    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 883    case GL_TEXTURE_LOD_BIAS:
 884    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 885       {
 886          /* convert int param to float */
 887          GLfloat fparams[4];
 888          fparams[0] = (GLfloat) params[0];
 889          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 890          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 891       }
 892       break;
 893    default:
 894       /* this will generate an error if pname is illegal */
 895       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 896    }
 897
 898    if (ctx->Driver.TexParameter && need_update) {
 899       GLfloat fparams[4];
 900       fparams[0] = INT_TO_FLOAT(params[0]);
 901       if (pname == GL_TEXTURE_BORDER_COLOR ||
 902           pname == GL_TEXTURE_CROP_RECT_OES) {
 903          fparams[1] = INT_TO_FLOAT(params[1]);
 904          fparams[2] = INT_TO_FLOAT(params[2]);
 905          fparams[3] = INT_TO_FLOAT(params[3]);
 906       }
 907       ctx->Driver.TexParameter(ctx, texObj, pname, fparams);
 908    }
 909 }
 910
 911
 912 /**
 913  * Set tex parameter to integer value(s).  Primarily intended to set
 914  * integer-valued texture border color (for integer-valued textures).
 915  * New in GL 3.0.
 916  */
 917 void GLAPIENTRY
 918 _mesa_TexParameterIiv(GLenum target, GLenum pname, const GLint *params)
 919 {
 920    struct gl_texture_object *texObj;
 921    GET_CURRENT_CONTEXT(ctx);
 922
 923    texObj = get_texobj(ctx, target, GL_FALSE);
 924    if (!texObj)
 925       return;
 926
 927    switch (pname) {
 928    case GL_TEXTURE_BORDER_COLOR:
 929       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 930       /* set the integer-valued border color */
 931       COPY_4V(texObj->Sampler.BorderColor.i, params);
 932       break;
 933    default:
 934       _mesa_TexParameteriv(target, pname, params);
 935       break;
 936    }
 937    /* XXX no driver hook for TexParameterIiv() yet */
 938 }
 939
 940
 941 /**
 942  * Set tex parameter to unsigned integer value(s).  Primarily intended to set
 943  * uint-valued texture border color (for integer-valued textures).
 944  * New in GL 3.0
 945  */
 946 void GLAPIENTRY
 947 _mesa_TexParameterIuiv(GLenum target, GLenum pname, const GLuint *params)
 948 {
 949    struct gl_texture_object *texObj;
 950    GET_CURRENT_CONTEXT(ctx);
 951
 952    texObj = get_texobj(ctx, target, GL_FALSE);
 953    if (!texObj)
 954       return;
 955
 956    switch (pname) {
 957    case GL_TEXTURE_BORDER_COLOR:
 958       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 959       /* set the unsigned integer-valued border color */
 960       COPY_4V(texObj->Sampler.BorderColor.ui, params);
 961       break;
 962    default:
 963       _mesa_TexParameteriv(target, pname, (const GLint *) params);
 964       break;
 965    }
 966    /* XXX no driver hook for TexParameterIuiv() yet */
 967 }
 968
 969
 970 static GLboolean
 971 legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target)
 972 {
 973    switch (target) {
 974    case GL_TEXTURE_1D:
 975    case GL_PROXY_TEXTURE_1D:
 976    case GL_TEXTURE_2D:
 977    case GL_PROXY_TEXTURE_2D:
 978    case GL_TEXTURE_3D:
 979    case GL_PROXY_TEXTURE_3D:
 980       return GL_TRUE;
 981    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
 982    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
 983    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
 984    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
 985    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
 986    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
 987    case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
 988       return ctx->Extensions.ARB_texture_cube_map;
 989    case GL_TEXTURE_RECTANGLE_NV:
 990    case GL_PROXY_TEXTURE_RECTANGLE_NV:
 991       return ctx->Extensions.NV_texture_rectangle;
 992    case GL_TEXTURE_1D_ARRAY_EXT:
 993    case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
 994    case GL_TEXTURE_2D_ARRAY_EXT:
 995    case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
 996       return ctx->Extensions.EXT_texture_array;
 997    case GL_TEXTURE_BUFFER:
 998       /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
 999        * but not in earlier versions that expose ARB_texture_buffer_object.
1000        *
1001        * From the ARB_texture_buffer_object spec:
1002        * "(7) Do buffer textures support texture parameters (TexParameter) or
1003        *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
1004        *
1005        *    RESOLVED:  No. [...] Note that the spec edits above don't add
1006        *    explicit error language for any of these cases.  That is because
1007        *    each of the functions enumerate the set of valid <target>
1008        *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
1009        *    these cases means that target is not legal, and an INVALID_ENUM
1010        *    error should be generated."
1011        *
1012        * From the OpenGL 3.1 spec:
1013        * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
1014        */
1015       return ctx->API == API_OPENGL_CORE && ctx->Version >= 31;
1016    case GL_TEXTURE_2D_MULTISAMPLE:
1017    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
1018    case GL_PROXY_TEXTURE_2D_MULTISAMPLE:
1019    case GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY:
1020       return ctx->Extensions.ARB_texture_multisample;
1021    default:
1022       return GL_FALSE;
1023    }
1024 }
1025
1026
1027 static void
1028 get_tex_level_parameter_image(struct gl_context *ctx,
1029                               const struct gl_texture_object *texObj,
1030                               GLenum target, GLint level,
1031                               GLenum pname, GLint *params)
1032 {
1033    const struct gl_texture_image *img = NULL;
1034    mesa_format texFormat;
1035
1036    img = _mesa_select_tex_image(ctx, texObj, target, level);
1037    if (!img || img->TexFormat == MESA_FORMAT_NONE) {
1038       /* undefined texture image */
1039       if (pname == GL_TEXTURE_COMPONENTS)
1040          *params = 1;
1041       else
1042          *params = 0;
1043       return;
1044    }
1045
1046    texFormat = img->TexFormat;
1047
1048    switch (pname) {
1049       case GL_TEXTURE_WIDTH:
1050          *params = img->Width;
1051          break;
1052       case GL_TEXTURE_HEIGHT:
1053          *params = img->Height;
1054          break;
1055       case GL_TEXTURE_DEPTH:
1056          *params = img->Depth;
1057          break;
1058       case GL_TEXTURE_INTERNAL_FORMAT:
1059          if (_mesa_is_format_compressed(texFormat)) {
1060             /* need to return the actual compressed format */
1061             *params = _mesa_compressed_format_to_glenum(ctx, texFormat);
1062          }
1063          else {
1064             /* If the true internal format is not compressed but the user
1065              * requested a generic compressed format, we have to return the
1066              * generic base format that matches.
1067              *
1068              * From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
1069              *
1070              *     "If no specific compressed format is available,
1071              *     internalformat is instead replaced by the corresponding base
1072              *     internal format."
1073              *
1074              * Otherwise just return the user's requested internal format
1075              */
1076             const GLenum f =
1077                _mesa_gl_compressed_format_base_format(img->InternalFormat);
1078
1079             *params = (f != 0) ? f : img->InternalFormat;
1080          }
1081          break;
1082       case GL_TEXTURE_BORDER:
1083          *params = img->Border;
1084          break;
1085       case GL_TEXTURE_RED_SIZE:
1086       case GL_TEXTURE_GREEN_SIZE:
1087       case GL_TEXTURE_BLUE_SIZE:
1088       case GL_TEXTURE_ALPHA_SIZE:
1089          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1090             *params = _mesa_get_format_bits(texFormat, pname);
1091          else
1092             *params = 0;
1093          break;
1094       case GL_TEXTURE_INTENSITY_SIZE:
1095       case GL_TEXTURE_LUMINANCE_SIZE:
1096          if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
1097             *params = _mesa_get_format_bits(texFormat, pname);
1098             if (*params == 0) {
1099                /* intensity or luminance is probably stored as RGB[A] */
1100                *params = MIN2(_mesa_get_format_bits(texFormat,
1101                                                     GL_TEXTURE_RED_SIZE),
1102                               _mesa_get_format_bits(texFormat,
1103                                                     GL_TEXTURE_GREEN_SIZE));
1104             }
1105          }
1106          else {
1107             *params = 0;
1108          }
1109          break;
1110       case GL_TEXTURE_DEPTH_SIZE_ARB:
1111          if (!ctx->Extensions.ARB_depth_texture)
1112             goto invalid_pname;
1113          *params = _mesa_get_format_bits(texFormat, pname);
1114          break;
1115       case GL_TEXTURE_STENCIL_SIZE:
1116          *params = _mesa_get_format_bits(texFormat, pname);
1117          break;
1118       case GL_TEXTURE_SHARED_SIZE:
1119          if (ctx->Version < 30 &&
1120              !ctx->Extensions.EXT_texture_shared_exponent)
1121             goto invalid_pname;
1122          *params = texFormat == MESA_FORMAT_R9G9B9E5_FLOAT ? 5 : 0;
1123          break;
1124
1125       /* GL_ARB_texture_compression */
1126       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1127          if (_mesa_is_format_compressed(texFormat) &&
1128              !_mesa_is_proxy_texture(target)) {
1129             *params = _mesa_format_image_size(texFormat, img->Width,
1130                                               img->Height, img->Depth);
1131          }
1132          else {
1133             _mesa_error(ctx, GL_INVALID_OPERATION,
1134                         "glGetTexLevelParameter[if]v(pname)");
1135          }
1136          break;
1137       case GL_TEXTURE_COMPRESSED:
1138          *params = (GLint) _mesa_is_format_compressed(texFormat);
1139          break;
1140
1141       /* GL_ARB_texture_float */
1142       case GL_TEXTURE_RED_TYPE_ARB:
1143       case GL_TEXTURE_GREEN_TYPE_ARB:
1144       case GL_TEXTURE_BLUE_TYPE_ARB:
1145       case GL_TEXTURE_ALPHA_TYPE_ARB:
1146       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1147       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1148       case GL_TEXTURE_DEPTH_TYPE_ARB:
1149          if (!ctx->Extensions.ARB_texture_float)
1150             goto invalid_pname;
1151          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1152             *params = _mesa_get_format_datatype(texFormat);
1153          else
1154             *params = GL_NONE;
1155          break;
1156
1157       /* GL_ARB_texture_multisample */
1158       case GL_TEXTURE_SAMPLES:
1159          if (!ctx->Extensions.ARB_texture_multisample)
1160             goto invalid_pname;
1161          *params = img->NumSamples;
1162          break;
1163
1164       case GL_TEXTURE_FIXED_SAMPLE_LOCATIONS:
1165          if (!ctx->Extensions.ARB_texture_multisample)
1166             goto invalid_pname;
1167          *params = img->FixedSampleLocations;
1168          break;
1169
1170       default:
1171          goto invalid_pname;
1172    }
1173
1174    /* no error if we get here */
1175    return;
1176
1177 invalid_pname:
1178    _mesa_error(ctx, GL_INVALID_ENUM,
1179                "glGetTexLevelParameter[if]v(pname=%s)",
1180                _mesa_lookup_enum_by_nr(pname));
1181 }
1182
1183
1184 static void
1185 get_tex_level_parameter_buffer(struct gl_context *ctx,
1186                                const struct gl_texture_object *texObj,
1187                                GLenum pname, GLint *params)
1188 {
1189    const struct gl_buffer_object *bo = texObj->BufferObject;
1190    mesa_format texFormat = texObj->_BufferObjectFormat;
1191    GLenum internalFormat = texObj->BufferObjectFormat;
1192    GLenum baseFormat = _mesa_get_format_base_format(texFormat);
1193
1194    if (!bo) {
1195       /* undefined texture buffer object */
1196       *params = pname == GL_TEXTURE_COMPONENTS ? 1 : 0;
1197       return;
1198    }
1199
1200    switch (pname) {
1201       case GL_TEXTURE_BUFFER_DATA_STORE_BINDING:
1202          *params = bo->Name;
1203          break;
1204       case GL_TEXTURE_WIDTH:
1205          *params = bo->Size;
1206          break;
1207       case GL_TEXTURE_HEIGHT:
1208       case GL_TEXTURE_DEPTH:
1209       case GL_TEXTURE_BORDER:
1210       case GL_TEXTURE_SHARED_SIZE:
1211       case GL_TEXTURE_COMPRESSED:
1212          *params = 0;
1213          break;
1214       case GL_TEXTURE_INTERNAL_FORMAT:
1215          *params = internalFormat;
1216          break;
1217       case GL_TEXTURE_RED_SIZE:
1218       case GL_TEXTURE_GREEN_SIZE:
1219       case GL_TEXTURE_BLUE_SIZE:
1220       case GL_TEXTURE_ALPHA_SIZE:
1221          if (_mesa_base_format_has_channel(baseFormat, pname))
1222             *params = _mesa_get_format_bits(texFormat, pname);
1223          else
1224             *params = 0;
1225          break;
1226       case GL_TEXTURE_INTENSITY_SIZE:
1227       case GL_TEXTURE_LUMINANCE_SIZE:
1228          if (_mesa_base_format_has_channel(baseFormat, pname)) {
1229             *params = _mesa_get_format_bits(texFormat, pname);
1230             if (*params == 0) {
1231                /* intensity or luminance is probably stored as RGB[A] */
1232                *params = MIN2(_mesa_get_format_bits(texFormat,
1233                                                     GL_TEXTURE_RED_SIZE),
1234                               _mesa_get_format_bits(texFormat,
1235                                                     GL_TEXTURE_GREEN_SIZE));
1236             }
1237          } else {
1238             *params = 0;
1239          }
1240          break;
1241       case GL_TEXTURE_DEPTH_SIZE_ARB:
1242       case GL_TEXTURE_STENCIL_SIZE_EXT:
1243          *params = _mesa_get_format_bits(texFormat, pname);
1244          break;
1245
1246       /* GL_ARB_texture_buffer_range */
1247       case GL_TEXTURE_BUFFER_OFFSET:
1248          if (!ctx->Extensions.ARB_texture_buffer_range)
1249             goto invalid_pname;
1250          *params = texObj->BufferOffset;
1251          break;
1252       case GL_TEXTURE_BUFFER_SIZE:
1253          if (!ctx->Extensions.ARB_texture_buffer_range)
1254             goto invalid_pname;
1255          *params = (texObj->BufferSize == -1) ? bo->Size : texObj->BufferSize;
1256          break;
1257
1258       /* GL_ARB_texture_compression */
1259       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1260          /* Always illegal for GL_TEXTURE_BUFFER */
1261          _mesa_error(ctx, GL_INVALID_OPERATION,
1262                      "glGetTexLevelParameter[if]v(pname)");
1263          break;
1264
1265       /* GL_ARB_texture_float */
1266       case GL_TEXTURE_RED_TYPE_ARB:
1267       case GL_TEXTURE_GREEN_TYPE_ARB:
1268       case GL_TEXTURE_BLUE_TYPE_ARB:
1269       case GL_TEXTURE_ALPHA_TYPE_ARB:
1270       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1271       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1272       case GL_TEXTURE_DEPTH_TYPE_ARB:
1273          if (!ctx->Extensions.ARB_texture_float)
1274             goto invalid_pname;
1275          if (_mesa_base_format_has_channel(baseFormat, pname))
1276             *params = _mesa_get_format_datatype(texFormat);
1277          else
1278             *params = GL_NONE;
1279          break;
1280
1281       default:
1282          goto invalid_pname;
1283    }
1284
1285    /* no error if we get here */
1286    return;
1287
1288 invalid_pname:
1289    _mesa_error(ctx, GL_INVALID_ENUM,
1290                "glGetTexLevelParameter[if]v(pname=%s)",
1291                _mesa_lookup_enum_by_nr(pname));
1292 }
1293
1294
1295 void GLAPIENTRY
1296 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
1297                               GLenum pname, GLfloat *params )
1298 {
1299    GLint iparam;
1300    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
1301    *params = (GLfloat) iparam;
1302 }
1303
1304
1305 void GLAPIENTRY
1306 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
1307                               GLenum pname, GLint *params )
1308 {
1309    struct gl_texture_object *texObj;
1310    GLint maxLevels;
1311    GET_CURRENT_CONTEXT(ctx);
1312
1313    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
1314       _mesa_error(ctx, GL_INVALID_OPERATION,
1315                   "glGetTexLevelParameteriv(current unit)");
1316       return;
1317    }
1318
1319    if (!legal_get_tex_level_parameter_target(ctx, target)) {
1320       _mesa_error(ctx, GL_INVALID_ENUM,
1321                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
1322       return;
1323    }
1324
1325    maxLevels = _mesa_max_texture_levels(ctx, target);
1326    assert(maxLevels != 0);
1327
1328    if (level < 0 || level >= maxLevels) {
1329       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
1330       return;
1331    }
1332
1333    texObj = _mesa_get_current_tex_object(ctx, target);
1334
1335    if (target == GL_TEXTURE_BUFFER)
1336       get_tex_level_parameter_buffer(ctx, texObj, pname, params);
1337    else
1338       get_tex_level_parameter_image(ctx, texObj, target, level, pname, params);
1339 }
1340
1341
1342 void GLAPIENTRY
1343 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
1344 {
1345    struct gl_texture_object *obj;
1346    GET_CURRENT_CONTEXT(ctx);
1347
1348    obj = get_texobj(ctx, target, GL_TRUE);
1349    if (!obj)
1350       return;
1351
1352    _mesa_lock_texture(ctx, obj);
1353    switch (pname) {
1354       case GL_TEXTURE_MAG_FILTER:
1355          *params = ENUM_TO_FLOAT(obj->Sampler.MagFilter);
1356          break;
1357       case GL_TEXTURE_MIN_FILTER:
1358          *params = ENUM_TO_FLOAT(obj->Sampler.MinFilter);
1359          break;
1360       case GL_TEXTURE_WRAP_S:
1361          *params = ENUM_TO_FLOAT(obj->Sampler.WrapS);
1362          break;
1363       case GL_TEXTURE_WRAP_T:
1364          *params = ENUM_TO_FLOAT(obj->Sampler.WrapT);
1365          break;
1366       case GL_TEXTURE_WRAP_R:
1367          *params = ENUM_TO_FLOAT(obj->Sampler.WrapR);
1368          break;
1369       case GL_TEXTURE_BORDER_COLOR:
1370          if (!_mesa_is_desktop_gl(ctx))
1371             goto invalid_pname;
1372
1373          if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
1374             _mesa_update_state_locked(ctx);
1375          if (_mesa_get_clamp_fragment_color(ctx)) {
1376             params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1377             params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1378             params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1379             params[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1380          }
1381          else {
1382             params[0] = obj->Sampler.BorderColor.f[0];
1383             params[1] = obj->Sampler.BorderColor.f[1];
1384             params[2] = obj->Sampler.BorderColor.f[2];
1385             params[3] = obj->Sampler.BorderColor.f[3];
1386          }
1387          break;
1388       case GL_TEXTURE_RESIDENT:
1389          if (ctx->API != API_OPENGL_COMPAT)
1390             goto invalid_pname;
1391
1392          *params = 1.0F;
1393          break;
1394       case GL_TEXTURE_PRIORITY:
1395          if (ctx->API != API_OPENGL_COMPAT)
1396             goto invalid_pname;
1397
1398          *params = obj->Priority;
1399          break;
1400       case GL_TEXTURE_MIN_LOD:
1401          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1402             goto invalid_pname;
1403
1404          *params = obj->Sampler.MinLod;
1405          break;
1406       case GL_TEXTURE_MAX_LOD:
1407          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1408             goto invalid_pname;
1409
1410          *params = obj->Sampler.MaxLod;
1411          break;
1412       case GL_TEXTURE_BASE_LEVEL:
1413          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1414             goto invalid_pname;
1415
1416          *params = (GLfloat) obj->BaseLevel;
1417          break;
1418       case GL_TEXTURE_MAX_LEVEL:
1419          *params = (GLfloat) obj->MaxLevel;
1420          break;
1421       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1422          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1423             goto invalid_pname;
1424          *params = obj->Sampler.MaxAnisotropy;
1425          break;
1426       case GL_GENERATE_MIPMAP_SGIS:
1427          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1428             goto invalid_pname;
1429
1430          *params = (GLfloat) obj->GenerateMipmap;
1431          break;
1432       case GL_TEXTURE_COMPARE_MODE_ARB:
1433          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1434              && !_mesa_is_gles3(ctx))
1435             goto invalid_pname;
1436          *params = (GLfloat) obj->Sampler.CompareMode;
1437          break;
1438       case GL_TEXTURE_COMPARE_FUNC_ARB:
1439          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1440              && !_mesa_is_gles3(ctx))
1441             goto invalid_pname;
1442          *params = (GLfloat) obj->Sampler.CompareFunc;
1443          break;
1444       case GL_DEPTH_TEXTURE_MODE_ARB:
1445          /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has
1446           * never existed in OpenGL ES.
1447           */
1448          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1449             goto invalid_pname;
1450          *params = (GLfloat) obj->DepthMode;
1451          break;
1452       case GL_TEXTURE_LOD_BIAS:
1453          if (_mesa_is_gles(ctx))
1454             goto invalid_pname;
1455
1456          *params = obj->Sampler.LodBias;
1457          break;
1458       case GL_TEXTURE_CROP_RECT_OES:
1459          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1460             goto invalid_pname;
1461
1462          params[0] = (GLfloat) obj->CropRect[0];
1463          params[1] = (GLfloat) obj->CropRect[1];
1464          params[2] = (GLfloat) obj->CropRect[2];
1465          params[3] = (GLfloat) obj->CropRect[3];
1466          break;
1467
1468       case GL_TEXTURE_SWIZZLE_R_EXT:
1469       case GL_TEXTURE_SWIZZLE_G_EXT:
1470       case GL_TEXTURE_SWIZZLE_B_EXT:
1471       case GL_TEXTURE_SWIZZLE_A_EXT:
1472          if ((!_mesa_is_desktop_gl(ctx)
1473               || !ctx->Extensions.EXT_texture_swizzle)
1474              && !_mesa_is_gles3(ctx))
1475             goto invalid_pname;
1476          *params = (GLfloat) obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1477          break;
1478
1479       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1480          if ((!_mesa_is_desktop_gl(ctx)
1481               || !ctx->Extensions.EXT_texture_swizzle)
1482              && !_mesa_is_gles3(ctx)) {
1483             goto invalid_pname;
1484          }
1485          else {
1486             GLuint comp;
1487             for (comp = 0; comp < 4; comp++) {
1488                params[comp] = (GLfloat) obj->Swizzle[comp];
1489             }
1490          }
1491          break;
1492
1493       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1494          if (!_mesa_is_desktop_gl(ctx)
1495              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1496             goto invalid_pname;
1497          *params = (GLfloat) obj->Sampler.CubeMapSeamless;
1498          break;
1499
1500       case GL_TEXTURE_IMMUTABLE_FORMAT:
1501          *params = (GLfloat) obj->Immutable;
1502          break;
1503
1504       case GL_TEXTURE_IMMUTABLE_LEVELS:
1505          if (_mesa_is_gles3(ctx) ||
1506              (_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_texture_view))
1507             *params = (GLfloat) obj->ImmutableLevels;
1508          else
1509             goto invalid_pname;
1510          break;
1511
1512       case GL_TEXTURE_VIEW_MIN_LEVEL:
1513          if (!ctx->Extensions.ARB_texture_view)
1514             goto invalid_pname;
1515          *params = (GLfloat) obj->MinLevel;
1516          break;
1517
1518       case GL_TEXTURE_VIEW_NUM_LEVELS:
1519          if (!ctx->Extensions.ARB_texture_view)
1520             goto invalid_pname;
1521          *params = (GLfloat) obj->NumLevels;
1522          break;
1523
1524       case GL_TEXTURE_VIEW_MIN_LAYER:
1525          if (!ctx->Extensions.ARB_texture_view)
1526             goto invalid_pname;
1527          *params = (GLfloat) obj->MinLayer;
1528          break;
1529
1530       case GL_TEXTURE_VIEW_NUM_LAYERS:
1531          if (!ctx->Extensions.ARB_texture_view)
1532             goto invalid_pname;
1533          *params = (GLfloat) obj->NumLayers;
1534          break;
1535
1536       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1537          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1538             goto invalid_pname;
1539          *params = (GLfloat) obj->RequiredTextureImageUnits;
1540          break;
1541
1542       case GL_TEXTURE_SRGB_DECODE_EXT:
1543          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1544             goto invalid_pname;
1545          *params = (GLfloat) obj->Sampler.sRGBDecode;
1546          break;
1547
1548       default:
1549          goto invalid_pname;
1550    }
1551
1552    /* no error if we get here */
1553    _mesa_unlock_texture(ctx, obj);
1554    return;
1555
1556 invalid_pname:
1557    _mesa_unlock_texture(ctx, obj);
1558    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname);
1559 }
1560
1561
1562 void GLAPIENTRY
1563 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1564 {
1565    struct gl_texture_object *obj;
1566    GET_CURRENT_CONTEXT(ctx);
1567
1568    obj = get_texobj(ctx, target, GL_TRUE);
1569    if (!obj)
1570       return;
1571
1572    _mesa_lock_texture(ctx, obj);
1573    switch (pname) {
1574       case GL_TEXTURE_MAG_FILTER:
1575          *params = (GLint) obj->Sampler.MagFilter;
1576          break;
1577       case GL_TEXTURE_MIN_FILTER:
1578          *params = (GLint) obj->Sampler.MinFilter;
1579          break;
1580       case GL_TEXTURE_WRAP_S:
1581          *params = (GLint) obj->Sampler.WrapS;
1582          break;
1583       case GL_TEXTURE_WRAP_T:
1584          *params = (GLint) obj->Sampler.WrapT;
1585          break;
1586       case GL_TEXTURE_WRAP_R:
1587          *params = (GLint) obj->Sampler.WrapR;
1588          break;
1589       case GL_TEXTURE_BORDER_COLOR:
1590          if (!_mesa_is_desktop_gl(ctx))
1591             goto invalid_pname;
1592
1593          {
1594             GLfloat b[4];
1595             b[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1596             b[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1597             b[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1598             b[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1599             params[0] = FLOAT_TO_INT(b[0]);
1600             params[1] = FLOAT_TO_INT(b[1]);
1601             params[2] = FLOAT_TO_INT(b[2]);
1602             params[3] = FLOAT_TO_INT(b[3]);
1603          }
1604          break;
1605       case GL_TEXTURE_RESIDENT:
1606          if (ctx->API != API_OPENGL_COMPAT)
1607             goto invalid_pname;
1608
1609          *params = 1;
1610          break;
1611       case GL_TEXTURE_PRIORITY:
1612          if (ctx->API != API_OPENGL_COMPAT)
1613             goto invalid_pname;
1614
1615          *params = FLOAT_TO_INT(obj->Priority);
1616          break;
1617       case GL_TEXTURE_MIN_LOD:
1618          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1619             goto invalid_pname;
1620
1621          *params = (GLint) obj->Sampler.MinLod;
1622          break;
1623       case GL_TEXTURE_MAX_LOD:
1624          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1625             goto invalid_pname;
1626
1627          *params = (GLint) obj->Sampler.MaxLod;
1628          break;
1629       case GL_TEXTURE_BASE_LEVEL:
1630          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1631             goto invalid_pname;
1632
1633          *params = obj->BaseLevel;
1634          break;
1635       case GL_TEXTURE_MAX_LEVEL:
1636          *params = obj->MaxLevel;
1637          break;
1638       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1639          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1640             goto invalid_pname;
1641          *params = (GLint) obj->Sampler.MaxAnisotropy;
1642          break;
1643       case GL_GENERATE_MIPMAP_SGIS:
1644          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1645             goto invalid_pname;
1646
1647          *params = (GLint) obj->GenerateMipmap;
1648          break;
1649       case GL_TEXTURE_COMPARE_MODE_ARB:
1650          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1651              && !_mesa_is_gles3(ctx))
1652             goto invalid_pname;
1653          *params = (GLint) obj->Sampler.CompareMode;
1654          break;
1655       case GL_TEXTURE_COMPARE_FUNC_ARB:
1656          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1657              && !_mesa_is_gles3(ctx))
1658             goto invalid_pname;
1659          *params = (GLint) obj->Sampler.CompareFunc;
1660          break;
1661       case GL_DEPTH_TEXTURE_MODE_ARB:
1662          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1663             goto invalid_pname;
1664          *params = (GLint) obj->DepthMode;
1665          break;
1666       case GL_TEXTURE_LOD_BIAS:
1667          if (_mesa_is_gles(ctx))
1668             goto invalid_pname;
1669
1670          /* GL spec 'Data Conversions' section specifies that floating-point
1671           * value in integer Get function is rounded to nearest integer
1672           */
1673          *params = IROUND(obj->Sampler.LodBias);
1674          break;
1675       case GL_TEXTURE_CROP_RECT_OES:
1676          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1677             goto invalid_pname;
1678
1679          params[0] = obj->CropRect[0];
1680          params[1] = obj->CropRect[1];
1681          params[2] = obj->CropRect[2];
1682          params[3] = obj->CropRect[3];
1683          break;
1684       case GL_TEXTURE_SWIZZLE_R_EXT:
1685       case GL_TEXTURE_SWIZZLE_G_EXT:
1686       case GL_TEXTURE_SWIZZLE_B_EXT:
1687       case GL_TEXTURE_SWIZZLE_A_EXT:
1688          if ((!_mesa_is_desktop_gl(ctx)
1689               || !ctx->Extensions.EXT_texture_swizzle)
1690              && !_mesa_is_gles3(ctx))
1691             goto invalid_pname;
1692          *params = obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1693          break;
1694
1695       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1696          if ((!_mesa_is_desktop_gl(ctx)
1697               || !ctx->Extensions.EXT_texture_swizzle)
1698              && !_mesa_is_gles3(ctx))
1699             goto invalid_pname;
1700          COPY_4V(params, obj->Swizzle);
1701          break;
1702
1703       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1704          if (!_mesa_is_desktop_gl(ctx)
1705              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1706             goto invalid_pname;
1707          *params = (GLint) obj->Sampler.CubeMapSeamless;
1708          break;
1709
1710       case GL_TEXTURE_IMMUTABLE_FORMAT:
1711          *params = (GLint) obj->Immutable;
1712          break;
1713
1714       case GL_TEXTURE_IMMUTABLE_LEVELS:
1715          if (_mesa_is_gles3(ctx) ||
1716              (_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_texture_view))
1717             *params = obj->ImmutableLevels;
1718          else
1719             goto invalid_pname;
1720          break;
1721
1722       case GL_TEXTURE_VIEW_MIN_LEVEL:
1723          if (!ctx->Extensions.ARB_texture_view)
1724             goto invalid_pname;
1725          *params = (GLint) obj->MinLevel;
1726          break;
1727
1728       case GL_TEXTURE_VIEW_NUM_LEVELS:
1729          if (!ctx->Extensions.ARB_texture_view)
1730             goto invalid_pname;
1731          *params = (GLint) obj->NumLevels;
1732          break;
1733
1734       case GL_TEXTURE_VIEW_MIN_LAYER:
1735          if (!ctx->Extensions.ARB_texture_view)
1736             goto invalid_pname;
1737          *params = (GLint) obj->MinLayer;
1738          break;
1739
1740       case GL_TEXTURE_VIEW_NUM_LAYERS:
1741          if (!ctx->Extensions.ARB_texture_view)
1742             goto invalid_pname;
1743          *params = (GLint) obj->NumLayers;
1744          break;
1745
1746       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1747          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1748             goto invalid_pname;
1749          *params = obj->RequiredTextureImageUnits;
1750          break;
1751
1752       case GL_TEXTURE_SRGB_DECODE_EXT:
1753          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1754             goto invalid_pname;
1755          *params = obj->Sampler.sRGBDecode;
1756          break;
1757
1758       case GL_IMAGE_FORMAT_COMPATIBILITY_TYPE:
1759          if (!ctx->Extensions.ARB_shader_image_load_store)
1760             goto invalid_pname;
1761          *params = obj->ImageFormatCompatibilityType;
1762          break;
1763
1764       default:
1765          goto invalid_pname;
1766    }
1767
1768    /* no error if we get here */
1769    _mesa_unlock_texture(ctx, obj);
1770    return;
1771
1772 invalid_pname:
1773    _mesa_unlock_texture(ctx, obj);
1774    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
1775 }
1776
1777
1778 /** New in GL 3.0 */
1779 void GLAPIENTRY
1780 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1781 {
1782    struct gl_texture_object *texObj;
1783    GET_CURRENT_CONTEXT(ctx);
1784
1785    texObj = get_texobj(ctx, target, GL_TRUE);
1786    if (!texObj)
1787       return;
1788
1789    switch (pname) {
1790    case GL_TEXTURE_BORDER_COLOR:
1791       COPY_4V(params, texObj->Sampler.BorderColor.i);
1792       break;
1793    default:
1794       _mesa_GetTexParameteriv(target, pname, params);
1795    }
1796 }
1797
1798
1799 /** New in GL 3.0 */
1800 void GLAPIENTRY
1801 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1802 {
1803    struct gl_texture_object *texObj;
1804    GET_CURRENT_CONTEXT(ctx);
1805
1806    texObj = get_texobj(ctx, target, GL_TRUE);
1807    if (!texObj)
1808       return;
1809
1810    switch (pname) {
1811    case GL_TEXTURE_BORDER_COLOR:
1812       COPY_4V(params, texObj->Sampler.BorderColor.i);
1813       break;
1814    default:
1815       {
1816          GLint ip[4];
1817          _mesa_GetTexParameteriv(target, pname, ip);
1818          params[0] = ip[0];
1819          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1820              pname == GL_TEXTURE_CROP_RECT_OES) {
1821             params[1] = ip[1];
1822             params[2] = ip[2];
1823             params[3] = ip[3];
1824          }
1825       }
1826    }
1827 }