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_select_tex_object() in that proxy
 122  * 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
 130    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
 131       _mesa_error(ctx, GL_INVALID_OPERATION,
 132                   "gl%sTexParameter(current unit)", get ? "Get" : "");
 133       return NULL;
 134    }
 135
 136    texUnit = _mesa_get_current_tex_unit(ctx);
 137
 138    switch (target) {
 139    case GL_TEXTURE_1D:
 140       if (_mesa_is_desktop_gl(ctx))
 141          return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 142       break;
 143    case GL_TEXTURE_2D:
 144       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 145    case GL_TEXTURE_3D:
 146       if (ctx->API != API_OPENGLES)
 147          return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 148       break;
 149    case GL_TEXTURE_CUBE_MAP:
 150       if (ctx->Extensions.ARB_texture_cube_map) {
 151          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 152       }
 153       break;
 154    case GL_TEXTURE_RECTANGLE_NV:
 155       if (_mesa_is_desktop_gl(ctx)
 156           && ctx->Extensions.NV_texture_rectangle) {
 157          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 158       }
 159       break;
 160    case GL_TEXTURE_1D_ARRAY_EXT:
 161       if (_mesa_is_desktop_gl(ctx)
 162           && (ctx->Extensions.MESA_texture_array ||
 163               ctx->Extensions.EXT_texture_array)) {
 164          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 165       }
 166       break;
 167    case GL_TEXTURE_2D_ARRAY_EXT:
 168       if ((_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx))
 169           && (ctx->Extensions.MESA_texture_array ||
 170               ctx->Extensions.EXT_texture_array)) {
 171          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 172       }
 173       break;
 174    case GL_TEXTURE_EXTERNAL_OES:
 175       if (_mesa_is_gles(ctx) && ctx->Extensions.OES_EGL_image_external) {
 176          return texUnit->CurrentTex[TEXTURE_EXTERNAL_INDEX];
 177       }
 178       break;
 179    case GL_TEXTURE_CUBE_MAP_ARRAY:
 180       if (ctx->Extensions.ARB_texture_cube_map_array) {
 181          return texUnit->CurrentTex[TEXTURE_CUBE_ARRAY_INDEX];
 182       }
 183       break;
 184    case GL_TEXTURE_2D_MULTISAMPLE:
 185       if (ctx->Extensions.ARB_texture_multisample) {
 186          return texUnit->CurrentTex[TEXTURE_2D_MULTISAMPLE_INDEX];
 187       }
 188       break;
 189    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 190       if (ctx->Extensions.ARB_texture_multisample) {
 191          return texUnit->CurrentTex[TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX];
 192       }
 193       break;
 194    default:
 195       ;
 196    }
 197
 198    _mesa_error(ctx, GL_INVALID_ENUM,
 199                   "gl%sTexParameter(target)", get ? "Get" : "");
 200    return NULL;
 201 }
 202
 203
 204 /**
 205  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 206  * \return -1 if error.
 207  */
 208 static GLint
 209 comp_to_swizzle(GLenum comp)
 210 {
 211    switch (comp) {
 212    case GL_RED:
 213       return SWIZZLE_X;
 214    case GL_GREEN:
 215       return SWIZZLE_Y;
 216    case GL_BLUE:
 217       return SWIZZLE_Z;
 218    case GL_ALPHA:
 219       return SWIZZLE_W;
 220    case GL_ZERO:
 221       return SWIZZLE_ZERO;
 222    case GL_ONE:
 223       return SWIZZLE_ONE;
 224    default:
 225       return -1;
 226    }
 227 }
 228
 229
 230 static void
 231 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 232 {
 233    ASSERT(comp < 4);
 234    ASSERT(swz <= SWIZZLE_NIL);
 235    {
 236       GLuint mask = 0x7 << (3 * comp);
 237       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 238       *swizzle = s;
 239    }
 240 }
 241
 242
 243 /**
 244  * This is called just prior to changing any texture object state which
 245  * will not effect texture completeness.
 246  */
 247 static inline void
 248 flush(struct gl_context *ctx)
 249 {
 250    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 251 }
 252
 253
 254 /**
 255  * This is called just prior to changing any texture object state which
 256  * can effect texture completeness (texture base level, max level).
 257  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 258  * state flag and then mark the texture object as 'incomplete' so that any
 259  * per-texture derived state gets recomputed.
 260  */
 261 static inline void
 262 incomplete(struct gl_context *ctx, struct gl_texture_object *texObj)
 263 {
 264    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 265    _mesa_dirty_texobj(ctx, texObj);
 266 }
 267
 268
 269 static GLboolean
 270 target_allows_setting_sampler_parameters(GLenum target)
 271 {
 272    switch (target) {
 273    case GL_TEXTURE_2D_MULTISAMPLE:
 274    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 275       return GL_FALSE;
 276
 277    default:
 278       return GL_TRUE;
 279    }
 280 }
 281
 282
 283 /**
 284  * Set an integer-valued texture parameter
 285  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 286  */
 287 static GLboolean
 288 set_tex_parameteri(struct gl_context *ctx,
 289                    struct gl_texture_object *texObj,
 290                    GLenum pname, const GLint *params)
 291 {
 292    switch (pname) {
 293    case GL_TEXTURE_MIN_FILTER:
 294       if (!target_allows_setting_sampler_parameters(texObj->Target))
 295          goto invalid_operation;
 296
 297       if (texObj->Sampler.MinFilter == params[0])
 298          return GL_FALSE;
 299       switch (params[0]) {
 300       case GL_NEAREST:
 301       case GL_LINEAR:
 302          flush(ctx);
 303          texObj->Sampler.MinFilter = params[0];
 304          return GL_TRUE;
 305       case GL_NEAREST_MIPMAP_NEAREST:
 306       case GL_LINEAR_MIPMAP_NEAREST:
 307       case GL_NEAREST_MIPMAP_LINEAR:
 308       case GL_LINEAR_MIPMAP_LINEAR:
 309          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV &&
 310              texObj->Target != GL_TEXTURE_EXTERNAL_OES) {
 311             flush(ctx);
 312             texObj->Sampler.MinFilter = params[0];
 313             return GL_TRUE;
 314          }
 315          /* fall-through */
 316       default:
 317          goto invalid_param;
 318       }
 319       return GL_FALSE;
 320
 321    case GL_TEXTURE_MAG_FILTER:
 322       if (!target_allows_setting_sampler_parameters(texObj->Target))
 323          goto invalid_operation;
 324
 325       if (texObj->Sampler.MagFilter == params[0])
 326          return GL_FALSE;
 327       switch (params[0]) {
 328       case GL_NEAREST:
 329       case GL_LINEAR:
 330          flush(ctx); /* does not effect completeness */
 331          texObj->Sampler.MagFilter = params[0];
 332          return GL_TRUE;
 333       default:
 334          goto invalid_param;
 335       }
 336       return GL_FALSE;
 337
 338    case GL_TEXTURE_WRAP_S:
 339       if (!target_allows_setting_sampler_parameters(texObj->Target))
 340          goto invalid_operation;
 341
 342       if (texObj->Sampler.WrapS == params[0])
 343          return GL_FALSE;
 344       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 345          flush(ctx);
 346          texObj->Sampler.WrapS = params[0];
 347          return GL_TRUE;
 348       }
 349       return GL_FALSE;
 350
 351    case GL_TEXTURE_WRAP_T:
 352       if (!target_allows_setting_sampler_parameters(texObj->Target))
 353          goto invalid_operation;
 354
 355       if (texObj->Sampler.WrapT == params[0])
 356          return GL_FALSE;
 357       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 358          flush(ctx);
 359          texObj->Sampler.WrapT = params[0];
 360          return GL_TRUE;
 361       }
 362       return GL_FALSE;
 363
 364    case GL_TEXTURE_WRAP_R:
 365       if (!target_allows_setting_sampler_parameters(texObj->Target))
 366          goto invalid_operation;
 367
 368       if (texObj->Sampler.WrapR == params[0])
 369          return GL_FALSE;
 370       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 371          flush(ctx);
 372          texObj->Sampler.WrapR = params[0];
 373          return GL_TRUE;
 374       }
 375       return GL_FALSE;
 376
 377    case GL_TEXTURE_BASE_LEVEL:
 378       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 379          goto invalid_pname;
 380
 381       if (texObj->BaseLevel == params[0])
 382          return GL_FALSE;
 383
 384       if ((texObj->Target == GL_TEXTURE_2D_MULTISAMPLE ||
 385            texObj->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) && params[0] != 0)
 386          goto invalid_operation;
 387
 388       if (params[0] < 0 ||
 389           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 390          _mesa_error(ctx, GL_INVALID_VALUE,
 391                      "glTexParameter(param=%d)", params[0]);
 392          return GL_FALSE;
 393       }
 394       incomplete(ctx, texObj);
 395
 396       /** See note about ARB_texture_storage below */
 397       if (texObj->Immutable)
 398          texObj->BaseLevel = MIN2(texObj->ImmutableLevels - 1, params[0]);
 399       else
 400          texObj->BaseLevel = params[0];
 401
 402       return GL_TRUE;
 403
 404    case GL_TEXTURE_MAX_LEVEL:
 405       if (texObj->MaxLevel == params[0])
 406          return GL_FALSE;
 407
 408       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 409          _mesa_error(ctx, GL_INVALID_VALUE,
 410                      "glTexParameter(param=%d)", params[0]);
 411          return GL_FALSE;
 412       }
 413       incomplete(ctx, texObj);
 414
 415       /** From ARB_texture_storage:
 416        * However, if TEXTURE_IMMUTABLE_FORMAT is TRUE, then level_base is
 417        * clamped to the range [0, <levels> - 1] and level_max is then clamped to
 418        * the range [level_base, <levels> - 1], where <levels> is the parameter
 419        * passed the call to TexStorage* for the texture object.
 420        */
 421       if (texObj->Immutable)
 422           texObj->MaxLevel = CLAMP(params[0], texObj->BaseLevel,
 423                                    texObj->ImmutableLevels - 1);
 424       else
 425          texObj->MaxLevel = params[0];
 426
 427       return GL_TRUE;
 428
 429    case GL_GENERATE_MIPMAP_SGIS:
 430       if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 431          goto invalid_pname;
 432
 433       if (params[0] && texObj->Target == GL_TEXTURE_EXTERNAL_OES)
 434          goto invalid_param;
 435       if (texObj->GenerateMipmap != params[0]) {
 436          /* no flush() */
 437          texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 438          return GL_TRUE;
 439       }
 440       return GL_FALSE;
 441
 442    case GL_TEXTURE_COMPARE_MODE_ARB:
 443       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 444           || _mesa_is_gles3(ctx)) {
 445
 446          if (!target_allows_setting_sampler_parameters(texObj->Target))
 447             goto invalid_operation;
 448
 449          if (texObj->Sampler.CompareMode == params[0])
 450             return GL_FALSE;
 451          if (params[0] == GL_NONE ||
 452              params[0] == GL_COMPARE_R_TO_TEXTURE_ARB) {
 453             flush(ctx);
 454             texObj->Sampler.CompareMode = params[0];
 455             return GL_TRUE;
 456          }
 457          goto invalid_param;
 458       }
 459       goto invalid_pname;
 460
 461    case GL_TEXTURE_COMPARE_FUNC_ARB:
 462       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 463           || _mesa_is_gles3(ctx)) {
 464
 465          if (!target_allows_setting_sampler_parameters(texObj->Target))
 466             goto invalid_operation;
 467
 468          if (texObj->Sampler.CompareFunc == params[0])
 469             return GL_FALSE;
 470          switch (params[0]) {
 471          case GL_LEQUAL:
 472          case GL_GEQUAL:
 473          case GL_EQUAL:
 474          case GL_NOTEQUAL:
 475          case GL_LESS:
 476          case GL_GREATER:
 477          case GL_ALWAYS:
 478          case GL_NEVER:
 479             flush(ctx);
 480             texObj->Sampler.CompareFunc = params[0];
 481             return GL_TRUE;
 482          default:
 483             goto invalid_param;
 484          }
 485       }
 486       goto invalid_pname;
 487
 488    case GL_DEPTH_TEXTURE_MODE_ARB:
 489       /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has never
 490        * existed in OpenGL ES.
 491        */
 492       if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.ARB_depth_texture) {
 493          if (texObj->DepthMode == params[0])
 494             return GL_FALSE;
 495          if (params[0] == GL_LUMINANCE ||
 496              params[0] == GL_INTENSITY ||
 497              params[0] == GL_ALPHA ||
 498              (ctx->Extensions.ARB_texture_rg && params[0] == GL_RED)) {
 499             flush(ctx);
 500             texObj->DepthMode = params[0];
 501             return GL_TRUE;
 502          }
 503          goto invalid_param;
 504       }
 505       goto invalid_pname;
 506
 507    case GL_TEXTURE_CROP_RECT_OES:
 508       if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
 509          goto invalid_pname;
 510
 511       texObj->CropRect[0] = params[0];
 512       texObj->CropRect[1] = params[1];
 513       texObj->CropRect[2] = params[2];
 514       texObj->CropRect[3] = params[3];
 515       return GL_TRUE;
 516
 517    case GL_TEXTURE_SWIZZLE_R_EXT:
 518    case GL_TEXTURE_SWIZZLE_G_EXT:
 519    case GL_TEXTURE_SWIZZLE_B_EXT:
 520    case GL_TEXTURE_SWIZZLE_A_EXT:
 521       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 522           || _mesa_is_gles3(ctx)) {
 523          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 524          const GLint swz = comp_to_swizzle(params[0]);
 525          if (swz < 0) {
 526             _mesa_error(ctx, GL_INVALID_OPERATION,
 527                         "glTexParameter(swizzle 0x%x)", params[0]);
 528             return GL_FALSE;
 529          }
 530          ASSERT(comp < 4);
 531
 532          flush(ctx);
 533          texObj->Swizzle[comp] = params[0];
 534          set_swizzle_component(&texObj->_Swizzle, comp, swz);
 535          return GL_TRUE;
 536       }
 537       goto invalid_pname;
 538
 539    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 540       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 541           || _mesa_is_gles3(ctx)) {
 542          GLuint comp;
 543          flush(ctx);
 544          for (comp = 0; comp < 4; comp++) {
 545             const GLint swz = comp_to_swizzle(params[comp]);
 546             if (swz >= 0) {
 547                texObj->Swizzle[comp] = params[comp];
 548                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 549             }
 550             else {
 551                _mesa_error(ctx, GL_INVALID_OPERATION,
 552                            "glTexParameter(swizzle 0x%x)", params[comp]);
 553                return GL_FALSE;
 554             }
 555          }
 556          return GL_TRUE;
 557       }
 558       goto invalid_pname;
 559
 560    case GL_TEXTURE_SRGB_DECODE_EXT:
 561       if (_mesa_is_desktop_gl(ctx)
 562           && ctx->Extensions.EXT_texture_sRGB_decode) {
 563          GLenum decode = params[0];
 564
 565          if (!target_allows_setting_sampler_parameters(texObj->Target))
 566             goto invalid_operation;
 567
 568          if (decode == GL_DECODE_EXT || decode == GL_SKIP_DECODE_EXT) {
 569             if (texObj->Sampler.sRGBDecode != decode) {
 570                flush(ctx);
 571                texObj->Sampler.sRGBDecode = decode;
 572             }
 573             return GL_TRUE;
 574          }
 575       }
 576       goto invalid_pname;
 577
 578    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 579       if (_mesa_is_desktop_gl(ctx)
 580           && ctx->Extensions.AMD_seamless_cubemap_per_texture) {
 581          GLenum param = params[0];
 582
 583          if (!target_allows_setting_sampler_parameters(texObj->Target))
 584             goto invalid_operation;
 585
 586          if (param != GL_TRUE && param != GL_FALSE) {
 587             goto invalid_param;
 588          }
 589          if (param != texObj->Sampler.CubeMapSeamless) {
 590             flush(ctx);
 591             texObj->Sampler.CubeMapSeamless = param;
 592          }
 593          return GL_TRUE;
 594       }
 595       goto invalid_pname;
 596
 597    default:
 598       goto invalid_pname;
 599    }
 600
 601 invalid_pname:
 602    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 603                _mesa_lookup_enum_by_nr(pname));
 604    return GL_FALSE;
 605
 606 invalid_param:
 607    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param=%s)",
 608                _mesa_lookup_enum_by_nr(params[0]));
 609    return GL_FALSE;
 610
 611 invalid_operation:
 612    _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(pname=%s)",
 613                _mesa_lookup_enum_by_nr(pname));
 614    return GL_FALSE;
 615 }
 616
 617
 618 /**
 619  * Set a float-valued texture parameter
 620  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 621  */
 622 static GLboolean
 623 set_tex_parameterf(struct gl_context *ctx,
 624                    struct gl_texture_object *texObj,
 625                    GLenum pname, const GLfloat *params)
 626 {
 627    switch (pname) {
 628    case GL_TEXTURE_MIN_LOD:
 629       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 630          goto invalid_pname;
 631
 632       if (!target_allows_setting_sampler_parameters(texObj->Target))
 633          goto invalid_operation;
 634
 635       if (texObj->Sampler.MinLod == params[0])
 636          return GL_FALSE;
 637       flush(ctx);
 638       texObj->Sampler.MinLod = params[0];
 639       return GL_TRUE;
 640
 641    case GL_TEXTURE_MAX_LOD:
 642       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 643          goto invalid_pname;
 644
 645       if (!target_allows_setting_sampler_parameters(texObj->Target))
 646          goto invalid_operation;
 647
 648       if (texObj->Sampler.MaxLod == params[0])
 649          return GL_FALSE;
 650       flush(ctx);
 651       texObj->Sampler.MaxLod = params[0];
 652       return GL_TRUE;
 653
 654    case GL_TEXTURE_PRIORITY:
 655       if (ctx->API != API_OPENGL_COMPAT)
 656          goto invalid_pname;
 657
 658       flush(ctx);
 659       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 660       return GL_TRUE;
 661
 662    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 663       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 664          if (!target_allows_setting_sampler_parameters(texObj->Target))
 665             goto invalid_operation;
 666
 667          if (texObj->Sampler.MaxAnisotropy == params[0])
 668             return GL_FALSE;
 669          if (params[0] < 1.0) {
 670             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 671             return GL_FALSE;
 672          }
 673          flush(ctx);
 674          /* clamp to max, that's what NVIDIA does */
 675          texObj->Sampler.MaxAnisotropy = MIN2(params[0],
 676                                       ctx->Const.MaxTextureMaxAnisotropy);
 677          return GL_TRUE;
 678       }
 679       else {
 680          static GLuint count = 0;
 681          if (count++ < 10)
 682             goto invalid_pname;
 683       }
 684       return GL_FALSE;
 685
 686    case GL_TEXTURE_LOD_BIAS:
 687       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias. */
 688       if (_mesa_is_gles(ctx))
 689          goto invalid_pname;
 690
 691       if (!target_allows_setting_sampler_parameters(texObj->Target))
 692          goto invalid_operation;
 693
 694       if (texObj->Sampler.LodBias != params[0]) {
 695          flush(ctx);
 696          texObj->Sampler.LodBias = params[0];
 697          return GL_TRUE;
 698       }
 699       break;
 700
 701    case GL_TEXTURE_BORDER_COLOR:
 702       if (!_mesa_is_desktop_gl(ctx))
 703          goto invalid_pname;
 704
 705       if (!target_allows_setting_sampler_parameters(texObj->Target))
 706          goto invalid_operation;
 707
 708       flush(ctx);
 709       /* ARB_texture_float disables clamping */
 710       if (ctx->Extensions.ARB_texture_float) {
 711          texObj->Sampler.BorderColor.f[RCOMP] = params[0];
 712          texObj->Sampler.BorderColor.f[GCOMP] = params[1];
 713          texObj->Sampler.BorderColor.f[BCOMP] = params[2];
 714          texObj->Sampler.BorderColor.f[ACOMP] = params[3];
 715       } else {
 716          texObj->Sampler.BorderColor.f[RCOMP] = CLAMP(params[0], 0.0F, 1.0F);
 717          texObj->Sampler.BorderColor.f[GCOMP] = CLAMP(params[1], 0.0F, 1.0F);
 718          texObj->Sampler.BorderColor.f[BCOMP] = CLAMP(params[2], 0.0F, 1.0F);
 719          texObj->Sampler.BorderColor.f[ACOMP] = CLAMP(params[3], 0.0F, 1.0F);
 720       }
 721       return GL_TRUE;
 722
 723    default:
 724       goto invalid_pname;
 725    }
 726    return GL_FALSE;
 727
 728 invalid_pname:
 729    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 730                _mesa_lookup_enum_by_nr(pname));
 731    return GL_FALSE;
 732
 733 invalid_operation:
 734    _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(pname=%s)",
 735                _mesa_lookup_enum_by_nr(pname));
 736    return GL_FALSE;
 737 }
 738
 739
 740 void GLAPIENTRY
 741 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 742 {
 743    GLboolean need_update;
 744    struct gl_texture_object *texObj;
 745    GET_CURRENT_CONTEXT(ctx);
 746
 747    texObj = get_texobj(ctx, target, GL_FALSE);
 748    if (!texObj)
 749       return;
 750
 751    switch (pname) {
 752    case GL_TEXTURE_MIN_FILTER:
 753    case GL_TEXTURE_MAG_FILTER:
 754    case GL_TEXTURE_WRAP_S:
 755    case GL_TEXTURE_WRAP_T:
 756    case GL_TEXTURE_WRAP_R:
 757    case GL_TEXTURE_BASE_LEVEL:
 758    case GL_TEXTURE_MAX_LEVEL:
 759    case GL_GENERATE_MIPMAP_SGIS:
 760    case GL_TEXTURE_COMPARE_MODE_ARB:
 761    case GL_TEXTURE_COMPARE_FUNC_ARB:
 762    case GL_DEPTH_TEXTURE_MODE_ARB:
 763    case GL_TEXTURE_SRGB_DECODE_EXT:
 764    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 765    case GL_TEXTURE_SWIZZLE_R_EXT:
 766    case GL_TEXTURE_SWIZZLE_G_EXT:
 767    case GL_TEXTURE_SWIZZLE_B_EXT:
 768    case GL_TEXTURE_SWIZZLE_A_EXT:
 769       {
 770          GLint p[4];
 771          p[0] = (param > 0) ?
 772                 ((param > INT_MAX) ? INT_MAX : (GLint) (param + 0.5)) :
 773                 ((param < INT_MIN) ? INT_MIN : (GLint) (param - 0.5));
 774
 775          p[1] = p[2] = p[3] = 0;
 776          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 777       }
 778       break;
 779    default:
 780       {
 781          /* this will generate an error if pname is illegal */
 782          GLfloat p[4];
 783          p[0] = param;
 784          p[1] = p[2] = p[3] = 0.0F;
 785          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 786       }
 787    }
 788
 789    if (ctx->Driver.TexParameter && need_update) {
 790       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 791    }
 792 }
 793
 794
 795 void GLAPIENTRY
 796 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 797 {
 798    GLboolean need_update;
 799    struct gl_texture_object *texObj;
 800    GET_CURRENT_CONTEXT(ctx);
 801
 802    texObj = get_texobj(ctx, target, GL_FALSE);
 803    if (!texObj)
 804       return;
 805
 806    switch (pname) {
 807    case GL_TEXTURE_MIN_FILTER:
 808    case GL_TEXTURE_MAG_FILTER:
 809    case GL_TEXTURE_WRAP_S:
 810    case GL_TEXTURE_WRAP_T:
 811    case GL_TEXTURE_WRAP_R:
 812    case GL_TEXTURE_BASE_LEVEL:
 813    case GL_TEXTURE_MAX_LEVEL:
 814    case GL_GENERATE_MIPMAP_SGIS:
 815    case GL_TEXTURE_COMPARE_MODE_ARB:
 816    case GL_TEXTURE_COMPARE_FUNC_ARB:
 817    case GL_DEPTH_TEXTURE_MODE_ARB:
 818    case GL_TEXTURE_SRGB_DECODE_EXT:
 819    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 820       {
 821          /* convert float param to int */
 822          GLint p[4];
 823          p[0] = (GLint) params[0];
 824          p[1] = p[2] = p[3] = 0;
 825          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 826       }
 827       break;
 828    case GL_TEXTURE_CROP_RECT_OES:
 829       {
 830          /* convert float params to int */
 831          GLint iparams[4];
 832          iparams[0] = (GLint) params[0];
 833          iparams[1] = (GLint) params[1];
 834          iparams[2] = (GLint) params[2];
 835          iparams[3] = (GLint) params[3];
 836          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 837       }
 838       break;
 839    case GL_TEXTURE_SWIZZLE_R_EXT:
 840    case GL_TEXTURE_SWIZZLE_G_EXT:
 841    case GL_TEXTURE_SWIZZLE_B_EXT:
 842    case GL_TEXTURE_SWIZZLE_A_EXT:
 843    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 844       {
 845          GLint p[4] = {0, 0, 0, 0};
 846          p[0] = (GLint) params[0];
 847          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT) {
 848             p[1] = (GLint) params[1];
 849             p[2] = (GLint) params[2];
 850             p[3] = (GLint) params[3];
 851          }
 852          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 853       }
 854       break;
 855    default:
 856       /* this will generate an error if pname is illegal */
 857       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 858    }
 859
 860    if (ctx->Driver.TexParameter && need_update) {
 861       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 862    }
 863 }
 864
 865
 866 void GLAPIENTRY
 867 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 868 {
 869    GLboolean need_update;
 870    struct gl_texture_object *texObj;
 871    GET_CURRENT_CONTEXT(ctx);
 872
 873    texObj = get_texobj(ctx, target, GL_FALSE);
 874    if (!texObj)
 875       return;
 876
 877    switch (pname) {
 878    case GL_TEXTURE_MIN_LOD:
 879    case GL_TEXTURE_MAX_LOD:
 880    case GL_TEXTURE_PRIORITY:
 881    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 882    case GL_TEXTURE_LOD_BIAS:
 883    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 884       {
 885          GLfloat fparam[4];
 886          fparam[0] = (GLfloat) param;
 887          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 888          /* convert int param to float */
 889          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 890       }
 891       break;
 892    default:
 893       /* this will generate an error if pname is illegal */
 894       {
 895          GLint iparam[4];
 896          iparam[0] = param;
 897          iparam[1] = iparam[2] = iparam[3] = 0;
 898          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 899       }
 900    }
 901
 902    if (ctx->Driver.TexParameter && need_update) {
 903       GLfloat fparam = (GLfloat) param;
 904       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 905    }
 906 }
 907
 908
 909 void GLAPIENTRY
 910 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 911 {
 912    GLboolean need_update;
 913    struct gl_texture_object *texObj;
 914    GET_CURRENT_CONTEXT(ctx);
 915
 916    texObj = get_texobj(ctx, target, GL_FALSE);
 917    if (!texObj)
 918       return;
 919
 920    switch (pname) {
 921    case GL_TEXTURE_BORDER_COLOR:
 922       {
 923          /* convert int params to float */
 924          GLfloat fparams[4];
 925          fparams[0] = INT_TO_FLOAT(params[0]);
 926          fparams[1] = INT_TO_FLOAT(params[1]);
 927          fparams[2] = INT_TO_FLOAT(params[2]);
 928          fparams[3] = INT_TO_FLOAT(params[3]);
 929          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 930       }
 931       break;
 932    case GL_TEXTURE_MIN_LOD:
 933    case GL_TEXTURE_MAX_LOD:
 934    case GL_TEXTURE_PRIORITY:
 935    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 936    case GL_TEXTURE_LOD_BIAS:
 937    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 938       {
 939          /* convert int param to float */
 940          GLfloat fparams[4];
 941          fparams[0] = (GLfloat) params[0];
 942          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 943          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 944       }
 945       break;
 946    default:
 947       /* this will generate an error if pname is illegal */
 948       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 949    }
 950
 951    if (ctx->Driver.TexParameter && need_update) {
 952       GLfloat fparams[4];
 953       fparams[0] = INT_TO_FLOAT(params[0]);
 954       if (pname == GL_TEXTURE_BORDER_COLOR ||
 955           pname == GL_TEXTURE_CROP_RECT_OES) {
 956          fparams[1] = INT_TO_FLOAT(params[1]);
 957          fparams[2] = INT_TO_FLOAT(params[2]);
 958          fparams[3] = INT_TO_FLOAT(params[3]);
 959       }
 960       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 961    }
 962 }
 963
 964
 965 /**
 966  * Set tex parameter to integer value(s).  Primarily intended to set
 967  * integer-valued texture border color (for integer-valued textures).
 968  * New in GL 3.0.
 969  */
 970 void GLAPIENTRY
 971 _mesa_TexParameterIiv(GLenum target, GLenum pname, const GLint *params)
 972 {
 973    struct gl_texture_object *texObj;
 974    GET_CURRENT_CONTEXT(ctx);
 975
 976    texObj = get_texobj(ctx, target, GL_FALSE);
 977    if (!texObj)
 978       return;
 979
 980    switch (pname) {
 981    case GL_TEXTURE_BORDER_COLOR:
 982       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 983       /* set the integer-valued border color */
 984       COPY_4V(texObj->Sampler.BorderColor.i, params);
 985       break;
 986    default:
 987       _mesa_TexParameteriv(target, pname, params);
 988       break;
 989    }
 990    /* XXX no driver hook for TexParameterIiv() yet */
 991 }
 992
 993
 994 /**
 995  * Set tex parameter to unsigned integer value(s).  Primarily intended to set
 996  * uint-valued texture border color (for integer-valued textures).
 997  * New in GL 3.0
 998  */
 999 void GLAPIENTRY
1000 _mesa_TexParameterIuiv(GLenum target, GLenum pname, const GLuint *params)
1001 {
1002    struct gl_texture_object *texObj;
1003    GET_CURRENT_CONTEXT(ctx);
1004
1005    texObj = get_texobj(ctx, target, GL_FALSE);
1006    if (!texObj)
1007       return;
1008
1009    switch (pname) {
1010    case GL_TEXTURE_BORDER_COLOR:
1011       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
1012       /* set the unsigned integer-valued border color */
1013       COPY_4V(texObj->Sampler.BorderColor.ui, params);
1014       break;
1015    default:
1016       _mesa_TexParameteriv(target, pname, (const GLint *) params);
1017       break;
1018    }
1019    /* XXX no driver hook for TexParameterIuiv() yet */
1020 }
1021
1022
1023 static GLboolean
1024 legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target)
1025 {
1026    switch (target) {
1027    case GL_TEXTURE_1D:
1028    case GL_PROXY_TEXTURE_1D:
1029    case GL_TEXTURE_2D:
1030    case GL_PROXY_TEXTURE_2D:
1031    case GL_TEXTURE_3D:
1032    case GL_PROXY_TEXTURE_3D:
1033       return GL_TRUE;
1034    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
1035    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
1036    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
1037    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
1038    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
1039    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
1040    case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
1041       return ctx->Extensions.ARB_texture_cube_map;
1042    case GL_TEXTURE_RECTANGLE_NV:
1043    case GL_PROXY_TEXTURE_RECTANGLE_NV:
1044       return ctx->Extensions.NV_texture_rectangle;
1045    case GL_TEXTURE_1D_ARRAY_EXT:
1046    case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
1047    case GL_TEXTURE_2D_ARRAY_EXT:
1048    case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
1049       return (ctx->Extensions.MESA_texture_array ||
1050               ctx->Extensions.EXT_texture_array);
1051    case GL_TEXTURE_BUFFER:
1052       /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
1053        * but not in earlier versions that expose ARB_texture_buffer_object.
1054        *
1055        * From the ARB_texture_buffer_object spec:
1056        * "(7) Do buffer textures support texture parameters (TexParameter) or
1057        *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
1058        *
1059        *    RESOLVED:  No. [...] Note that the spec edits above don't add
1060        *    explicit error language for any of these cases.  That is because
1061        *    each of the functions enumerate the set of valid <target>
1062        *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
1063        *    these cases means that target is not legal, and an INVALID_ENUM
1064        *    error should be generated."
1065        *
1066        * From the OpenGL 3.1 spec:
1067        * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
1068        */
1069       return ctx->API == API_OPENGL_CORE && ctx->Version >= 31;
1070    case GL_TEXTURE_2D_MULTISAMPLE:
1071    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
1072    case GL_PROXY_TEXTURE_2D_MULTISAMPLE:
1073    case GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY:
1074       return ctx->Extensions.ARB_texture_multisample;
1075    default:
1076       return GL_FALSE;
1077    }
1078 }
1079
1080
1081 static void
1082 get_tex_level_parameter_image(struct gl_context *ctx,
1083                               const struct gl_texture_object *texObj,
1084                               GLenum target, GLint level,
1085                               GLenum pname, GLint *params)
1086 {
1087    const struct gl_texture_image *img = NULL;
1088    gl_format texFormat;
1089
1090    img = _mesa_select_tex_image(ctx, texObj, target, level);
1091    if (!img || img->TexFormat == MESA_FORMAT_NONE) {
1092       /* undefined texture image */
1093       if (pname == GL_TEXTURE_COMPONENTS)
1094          *params = 1;
1095       else
1096          *params = 0;
1097       return;
1098    }
1099
1100    texFormat = img->TexFormat;
1101
1102    switch (pname) {
1103       case GL_TEXTURE_WIDTH:
1104          *params = img->Width;
1105          break;
1106       case GL_TEXTURE_HEIGHT:
1107          *params = img->Height;
1108          break;
1109       case GL_TEXTURE_DEPTH:
1110          *params = img->Depth;
1111          break;
1112       case GL_TEXTURE_INTERNAL_FORMAT:
1113          if (_mesa_is_format_compressed(texFormat)) {
1114             /* need to return the actual compressed format */
1115             *params = _mesa_compressed_format_to_glenum(ctx, texFormat);
1116          }
1117          else {
1118             /* If the true internal format is not compressed but the user
1119              * requested a generic compressed format, we have to return the
1120              * generic base format that matches.
1121              *
1122              * From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
1123              *
1124              *     "If no specific compressed format is available,
1125              *     internalformat is instead replaced by the corresponding base
1126              *     internal format."
1127              *
1128              * Otherwise just return the user's requested internal format
1129              */
1130             const GLenum f =
1131                _mesa_gl_compressed_format_base_format(img->InternalFormat);
1132
1133             *params = (f != 0) ? f : img->InternalFormat;
1134          }
1135          break;
1136       case GL_TEXTURE_BORDER:
1137          *params = img->Border;
1138          break;
1139       case GL_TEXTURE_RED_SIZE:
1140       case GL_TEXTURE_GREEN_SIZE:
1141       case GL_TEXTURE_BLUE_SIZE:
1142       case GL_TEXTURE_ALPHA_SIZE:
1143          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1144             *params = _mesa_get_format_bits(texFormat, pname);
1145          else
1146             *params = 0;
1147          break;
1148       case GL_TEXTURE_INTENSITY_SIZE:
1149       case GL_TEXTURE_LUMINANCE_SIZE:
1150          if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
1151             *params = _mesa_get_format_bits(texFormat, pname);
1152             if (*params == 0) {
1153                /* intensity or luminance is probably stored as RGB[A] */
1154                *params = MIN2(_mesa_get_format_bits(texFormat,
1155                                                     GL_TEXTURE_RED_SIZE),
1156                               _mesa_get_format_bits(texFormat,
1157                                                     GL_TEXTURE_GREEN_SIZE));
1158             }
1159          }
1160          else {
1161             *params = 0;
1162          }
1163          break;
1164       case GL_TEXTURE_DEPTH_SIZE_ARB:
1165          if (!ctx->Extensions.ARB_depth_texture)
1166             goto invalid_pname;
1167          *params = _mesa_get_format_bits(texFormat, pname);
1168          break;
1169       case GL_TEXTURE_STENCIL_SIZE_EXT:
1170          if (!ctx->Extensions.EXT_packed_depth_stencil &&
1171              !ctx->Extensions.ARB_framebuffer_object)
1172             goto invalid_pname;
1173          *params = _mesa_get_format_bits(texFormat, pname);
1174          break;
1175       case GL_TEXTURE_SHARED_SIZE:
1176          if (ctx->Version < 30 &&
1177              !ctx->Extensions.EXT_texture_shared_exponent)
1178             goto invalid_pname;
1179          *params = texFormat == MESA_FORMAT_RGB9_E5_FLOAT ? 5 : 0;
1180          break;
1181
1182       /* GL_ARB_texture_compression */
1183       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1184          if (_mesa_is_format_compressed(texFormat) &&
1185              !_mesa_is_proxy_texture(target)) {
1186             *params = _mesa_format_image_size(texFormat, img->Width,
1187                                               img->Height, img->Depth);
1188          }
1189          else {
1190             _mesa_error(ctx, GL_INVALID_OPERATION,
1191                         "glGetTexLevelParameter[if]v(pname)");
1192          }
1193          break;
1194       case GL_TEXTURE_COMPRESSED:
1195          *params = (GLint) _mesa_is_format_compressed(texFormat);
1196          break;
1197
1198       /* GL_ARB_texture_float */
1199       case GL_TEXTURE_RED_TYPE_ARB:
1200       case GL_TEXTURE_GREEN_TYPE_ARB:
1201       case GL_TEXTURE_BLUE_TYPE_ARB:
1202       case GL_TEXTURE_ALPHA_TYPE_ARB:
1203       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1204       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1205       case GL_TEXTURE_DEPTH_TYPE_ARB:
1206          if (!ctx->Extensions.ARB_texture_float)
1207             goto invalid_pname;
1208          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1209             *params = _mesa_get_format_datatype(texFormat);
1210          else
1211             *params = GL_NONE;
1212          break;
1213
1214       /* GL_ARB_texture_multisample */
1215       case GL_TEXTURE_SAMPLES:
1216          if (!ctx->Extensions.ARB_texture_multisample)
1217             goto invalid_pname;
1218          *params = img->NumSamples;
1219          break;
1220
1221       case GL_TEXTURE_FIXED_SAMPLE_LOCATIONS:
1222          if (!ctx->Extensions.ARB_texture_multisample)
1223             goto invalid_pname;
1224          *params = img->FixedSampleLocations;
1225          break;
1226
1227       default:
1228          goto invalid_pname;
1229    }
1230
1231    /* no error if we get here */
1232    return;
1233
1234 invalid_pname:
1235    _mesa_error(ctx, GL_INVALID_ENUM,
1236                "glGetTexLevelParameter[if]v(pname=%s)",
1237                _mesa_lookup_enum_by_nr(pname));
1238 }
1239
1240
1241 static void
1242 get_tex_level_parameter_buffer(struct gl_context *ctx,
1243                                const struct gl_texture_object *texObj,
1244                                GLenum pname, GLint *params)
1245 {
1246    const struct gl_buffer_object *bo = texObj->BufferObject;
1247    gl_format texFormat = texObj->_BufferObjectFormat;
1248    GLenum internalFormat = texObj->BufferObjectFormat;
1249    GLenum baseFormat = _mesa_get_format_base_format(texFormat);
1250
1251    if (!bo) {
1252       /* undefined texture buffer object */
1253       *params = pname == GL_TEXTURE_COMPONENTS ? 1 : 0;
1254       return;
1255    }
1256
1257    switch (pname) {
1258       case GL_TEXTURE_BUFFER_DATA_STORE_BINDING:
1259          *params = bo->Name;
1260          break;
1261       case GL_TEXTURE_WIDTH:
1262          *params = bo->Size;
1263          break;
1264       case GL_TEXTURE_HEIGHT:
1265       case GL_TEXTURE_DEPTH:
1266       case GL_TEXTURE_BORDER:
1267       case GL_TEXTURE_SHARED_SIZE:
1268       case GL_TEXTURE_COMPRESSED:
1269          *params = 0;
1270          break;
1271       case GL_TEXTURE_INTERNAL_FORMAT:
1272          *params = internalFormat;
1273          break;
1274       case GL_TEXTURE_RED_SIZE:
1275       case GL_TEXTURE_GREEN_SIZE:
1276       case GL_TEXTURE_BLUE_SIZE:
1277       case GL_TEXTURE_ALPHA_SIZE:
1278          if (_mesa_base_format_has_channel(baseFormat, pname))
1279             *params = _mesa_get_format_bits(texFormat, pname);
1280          else
1281             *params = 0;
1282          break;
1283       case GL_TEXTURE_INTENSITY_SIZE:
1284       case GL_TEXTURE_LUMINANCE_SIZE:
1285          if (_mesa_base_format_has_channel(baseFormat, pname)) {
1286             *params = _mesa_get_format_bits(texFormat, pname);
1287             if (*params == 0) {
1288                /* intensity or luminance is probably stored as RGB[A] */
1289                *params = MIN2(_mesa_get_format_bits(texFormat,
1290                                                     GL_TEXTURE_RED_SIZE),
1291                               _mesa_get_format_bits(texFormat,
1292                                                     GL_TEXTURE_GREEN_SIZE));
1293             }
1294          } else {
1295             *params = 0;
1296          }
1297          break;
1298       case GL_TEXTURE_DEPTH_SIZE_ARB:
1299       case GL_TEXTURE_STENCIL_SIZE_EXT:
1300          *params = _mesa_get_format_bits(texFormat, pname);
1301          break;
1302
1303       /* GL_ARB_texture_buffer_range */
1304       case GL_TEXTURE_BUFFER_OFFSET:
1305          if (!ctx->Extensions.ARB_texture_buffer_range)
1306             goto invalid_pname;
1307          *params = texObj->BufferOffset;
1308          break;
1309       case GL_TEXTURE_BUFFER_SIZE:
1310          if (!ctx->Extensions.ARB_texture_buffer_range)
1311             goto invalid_pname;
1312          *params = (texObj->BufferSize == -1) ? bo->Size : texObj->BufferSize;
1313          break;
1314
1315       /* GL_ARB_texture_compression */
1316       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1317          /* Always illegal for GL_TEXTURE_BUFFER */
1318          _mesa_error(ctx, GL_INVALID_OPERATION,
1319                      "glGetTexLevelParameter[if]v(pname)");
1320          break;
1321
1322       /* GL_ARB_texture_float */
1323       case GL_TEXTURE_RED_TYPE_ARB:
1324       case GL_TEXTURE_GREEN_TYPE_ARB:
1325       case GL_TEXTURE_BLUE_TYPE_ARB:
1326       case GL_TEXTURE_ALPHA_TYPE_ARB:
1327       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1328       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1329       case GL_TEXTURE_DEPTH_TYPE_ARB:
1330          if (!ctx->Extensions.ARB_texture_float)
1331             goto invalid_pname;
1332          if (_mesa_base_format_has_channel(baseFormat, pname))
1333             *params = _mesa_get_format_datatype(texFormat);
1334          else
1335             *params = GL_NONE;
1336          break;
1337
1338       default:
1339          goto invalid_pname;
1340    }
1341
1342    /* no error if we get here */
1343    return;
1344
1345 invalid_pname:
1346    _mesa_error(ctx, GL_INVALID_ENUM,
1347                "glGetTexLevelParameter[if]v(pname=%s)",
1348                _mesa_lookup_enum_by_nr(pname));
1349 }
1350
1351
1352 void GLAPIENTRY
1353 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
1354                               GLenum pname, GLfloat *params )
1355 {
1356    GLint iparam;
1357    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
1358    *params = (GLfloat) iparam;
1359 }
1360
1361
1362 void GLAPIENTRY
1363 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
1364                               GLenum pname, GLint *params )
1365 {
1366    const struct gl_texture_unit *texUnit;
1367    struct gl_texture_object *texObj;
1368    GLint maxLevels;
1369    GET_CURRENT_CONTEXT(ctx);
1370
1371    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
1372       _mesa_error(ctx, GL_INVALID_OPERATION,
1373                   "glGetTexLevelParameteriv(current unit)");
1374       return;
1375    }
1376
1377    texUnit = _mesa_get_current_tex_unit(ctx);
1378
1379    if (!legal_get_tex_level_parameter_target(ctx, target)) {
1380       _mesa_error(ctx, GL_INVALID_ENUM,
1381                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
1382       return;
1383    }
1384
1385    maxLevels = _mesa_max_texture_levels(ctx, target);
1386    assert(maxLevels != 0);
1387
1388    if (level < 0 || level >= maxLevels) {
1389       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
1390       return;
1391    }
1392
1393    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1394
1395    if (target == GL_TEXTURE_BUFFER)
1396       get_tex_level_parameter_buffer(ctx, texObj, pname, params);
1397    else
1398       get_tex_level_parameter_image(ctx, texObj, target, level, pname, params);
1399 }
1400
1401
1402 void GLAPIENTRY
1403 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
1404 {
1405    struct gl_texture_object *obj;
1406    GET_CURRENT_CONTEXT(ctx);
1407
1408    obj = get_texobj(ctx, target, GL_TRUE);
1409    if (!obj)
1410       return;
1411
1412    _mesa_lock_texture(ctx, obj);
1413    switch (pname) {
1414       case GL_TEXTURE_MAG_FILTER:
1415          *params = ENUM_TO_FLOAT(obj->Sampler.MagFilter);
1416          break;
1417       case GL_TEXTURE_MIN_FILTER:
1418          *params = ENUM_TO_FLOAT(obj->Sampler.MinFilter);
1419          break;
1420       case GL_TEXTURE_WRAP_S:
1421          *params = ENUM_TO_FLOAT(obj->Sampler.WrapS);
1422          break;
1423       case GL_TEXTURE_WRAP_T:
1424          *params = ENUM_TO_FLOAT(obj->Sampler.WrapT);
1425          break;
1426       case GL_TEXTURE_WRAP_R:
1427          *params = ENUM_TO_FLOAT(obj->Sampler.WrapR);
1428          break;
1429       case GL_TEXTURE_BORDER_COLOR:
1430          if (!_mesa_is_desktop_gl(ctx))
1431             goto invalid_pname;
1432
1433          if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
1434             _mesa_update_state_locked(ctx);
1435          if (_mesa_get_clamp_fragment_color(ctx)) {
1436             params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1437             params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1438             params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1439             params[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1440          }
1441          else {
1442             params[0] = obj->Sampler.BorderColor.f[0];
1443             params[1] = obj->Sampler.BorderColor.f[1];
1444             params[2] = obj->Sampler.BorderColor.f[2];
1445             params[3] = obj->Sampler.BorderColor.f[3];
1446          }
1447          break;
1448       case GL_TEXTURE_RESIDENT:
1449          if (ctx->API != API_OPENGL_COMPAT)
1450             goto invalid_pname;
1451
1452          *params = 1.0F;
1453          break;
1454       case GL_TEXTURE_PRIORITY:
1455          if (ctx->API != API_OPENGL_COMPAT)
1456             goto invalid_pname;
1457
1458          *params = obj->Priority;
1459          break;
1460       case GL_TEXTURE_MIN_LOD:
1461          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1462             goto invalid_pname;
1463
1464          *params = obj->Sampler.MinLod;
1465          break;
1466       case GL_TEXTURE_MAX_LOD:
1467          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1468             goto invalid_pname;
1469
1470          *params = obj->Sampler.MaxLod;
1471          break;
1472       case GL_TEXTURE_BASE_LEVEL:
1473          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1474             goto invalid_pname;
1475
1476          *params = (GLfloat) obj->BaseLevel;
1477          break;
1478       case GL_TEXTURE_MAX_LEVEL:
1479          *params = (GLfloat) obj->MaxLevel;
1480          break;
1481       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1482          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1483             goto invalid_pname;
1484          *params = obj->Sampler.MaxAnisotropy;
1485          break;
1486       case GL_GENERATE_MIPMAP_SGIS:
1487          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1488             goto invalid_pname;
1489
1490          *params = (GLfloat) obj->GenerateMipmap;
1491          break;
1492       case GL_TEXTURE_COMPARE_MODE_ARB:
1493          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1494              && !_mesa_is_gles3(ctx))
1495             goto invalid_pname;
1496          *params = (GLfloat) obj->Sampler.CompareMode;
1497          break;
1498       case GL_TEXTURE_COMPARE_FUNC_ARB:
1499          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1500              && !_mesa_is_gles3(ctx))
1501             goto invalid_pname;
1502          *params = (GLfloat) obj->Sampler.CompareFunc;
1503          break;
1504       case GL_DEPTH_TEXTURE_MODE_ARB:
1505          /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has
1506           * never existed in OpenGL ES.
1507           */
1508          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1509             goto invalid_pname;
1510          *params = (GLfloat) obj->DepthMode;
1511          break;
1512       case GL_TEXTURE_LOD_BIAS:
1513          if (_mesa_is_gles(ctx))
1514             goto invalid_pname;
1515
1516          *params = obj->Sampler.LodBias;
1517          break;
1518       case GL_TEXTURE_CROP_RECT_OES:
1519          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1520             goto invalid_pname;
1521
1522          params[0] = (GLfloat) obj->CropRect[0];
1523          params[1] = (GLfloat) obj->CropRect[1];
1524          params[2] = (GLfloat) obj->CropRect[2];
1525          params[3] = (GLfloat) obj->CropRect[3];
1526          break;
1527
1528       case GL_TEXTURE_SWIZZLE_R_EXT:
1529       case GL_TEXTURE_SWIZZLE_G_EXT:
1530       case GL_TEXTURE_SWIZZLE_B_EXT:
1531       case GL_TEXTURE_SWIZZLE_A_EXT:
1532          if ((!_mesa_is_desktop_gl(ctx)
1533               || !ctx->Extensions.EXT_texture_swizzle)
1534              && !_mesa_is_gles3(ctx))
1535             goto invalid_pname;
1536          *params = (GLfloat) obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1537          break;
1538
1539       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1540          if ((!_mesa_is_desktop_gl(ctx)
1541               || !ctx->Extensions.EXT_texture_swizzle)
1542              && !_mesa_is_gles3(ctx)) {
1543             goto invalid_pname;
1544          }
1545          else {
1546             GLuint comp;
1547             for (comp = 0; comp < 4; comp++) {
1548                params[comp] = (GLfloat) obj->Swizzle[comp];
1549             }
1550          }
1551          break;
1552
1553       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1554          if (!_mesa_is_desktop_gl(ctx)
1555              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1556             goto invalid_pname;
1557          *params = (GLfloat) obj->Sampler.CubeMapSeamless;
1558          break;
1559
1560       case GL_TEXTURE_IMMUTABLE_FORMAT:
1561          *params = (GLfloat) obj->Immutable;
1562          break;
1563
1564       case GL_TEXTURE_IMMUTABLE_LEVELS:
1565          if (!_mesa_is_gles3(ctx))
1566             goto invalid_pname;
1567          *params = (GLfloat) obj->ImmutableLevels;
1568          break;
1569
1570       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1571          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1572             goto invalid_pname;
1573          *params = (GLfloat) obj->RequiredTextureImageUnits;
1574          break;
1575
1576       case GL_TEXTURE_SRGB_DECODE_EXT:
1577          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1578             goto invalid_pname;
1579          *params = (GLfloat) obj->Sampler.sRGBDecode;
1580          break;
1581
1582       default:
1583          goto invalid_pname;
1584    }
1585
1586    /* no error if we get here */
1587    _mesa_unlock_texture(ctx, obj);
1588    return;
1589
1590 invalid_pname:
1591    _mesa_unlock_texture(ctx, obj);
1592    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname);
1593 }
1594
1595
1596 void GLAPIENTRY
1597 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1598 {
1599    struct gl_texture_object *obj;
1600    GET_CURRENT_CONTEXT(ctx);
1601
1602    obj = get_texobj(ctx, target, GL_TRUE);
1603    if (!obj)
1604       return;
1605
1606    _mesa_lock_texture(ctx, obj);
1607    switch (pname) {
1608       case GL_TEXTURE_MAG_FILTER:
1609          *params = (GLint) obj->Sampler.MagFilter;
1610          break;
1611       case GL_TEXTURE_MIN_FILTER:
1612          *params = (GLint) obj->Sampler.MinFilter;
1613          break;
1614       case GL_TEXTURE_WRAP_S:
1615          *params = (GLint) obj->Sampler.WrapS;
1616          break;
1617       case GL_TEXTURE_WRAP_T:
1618          *params = (GLint) obj->Sampler.WrapT;
1619          break;
1620       case GL_TEXTURE_WRAP_R:
1621          *params = (GLint) obj->Sampler.WrapR;
1622          break;
1623       case GL_TEXTURE_BORDER_COLOR:
1624          if (!_mesa_is_desktop_gl(ctx))
1625             goto invalid_pname;
1626
1627          {
1628             GLfloat b[4];
1629             b[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1630             b[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1631             b[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1632             b[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1633             params[0] = FLOAT_TO_INT(b[0]);
1634             params[1] = FLOAT_TO_INT(b[1]);
1635             params[2] = FLOAT_TO_INT(b[2]);
1636             params[3] = FLOAT_TO_INT(b[3]);
1637          }
1638          break;
1639       case GL_TEXTURE_RESIDENT:
1640          if (ctx->API != API_OPENGL_COMPAT)
1641             goto invalid_pname;
1642
1643          *params = 1;
1644          break;
1645       case GL_TEXTURE_PRIORITY:
1646          if (ctx->API != API_OPENGL_COMPAT)
1647             goto invalid_pname;
1648
1649          *params = FLOAT_TO_INT(obj->Priority);
1650          break;
1651       case GL_TEXTURE_MIN_LOD:
1652          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1653             goto invalid_pname;
1654
1655          *params = (GLint) obj->Sampler.MinLod;
1656          break;
1657       case GL_TEXTURE_MAX_LOD:
1658          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1659             goto invalid_pname;
1660
1661          *params = (GLint) obj->Sampler.MaxLod;
1662          break;
1663       case GL_TEXTURE_BASE_LEVEL:
1664          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1665             goto invalid_pname;
1666
1667          *params = obj->BaseLevel;
1668          break;
1669       case GL_TEXTURE_MAX_LEVEL:
1670          *params = obj->MaxLevel;
1671          break;
1672       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1673          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1674             goto invalid_pname;
1675          *params = (GLint) obj->Sampler.MaxAnisotropy;
1676          break;
1677       case GL_GENERATE_MIPMAP_SGIS:
1678          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1679             goto invalid_pname;
1680
1681          *params = (GLint) obj->GenerateMipmap;
1682          break;
1683       case GL_TEXTURE_COMPARE_MODE_ARB:
1684          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1685              && !_mesa_is_gles3(ctx))
1686             goto invalid_pname;
1687          *params = (GLint) obj->Sampler.CompareMode;
1688          break;
1689       case GL_TEXTURE_COMPARE_FUNC_ARB:
1690          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1691              && !_mesa_is_gles3(ctx))
1692             goto invalid_pname;
1693          *params = (GLint) obj->Sampler.CompareFunc;
1694          break;
1695       case GL_DEPTH_TEXTURE_MODE_ARB:
1696          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1697             goto invalid_pname;
1698          *params = (GLint) obj->DepthMode;
1699          break;
1700       case GL_TEXTURE_LOD_BIAS:
1701          if (_mesa_is_gles(ctx))
1702             goto invalid_pname;
1703
1704          /* GL spec 'Data Conversions' section specifies that floating-point
1705           * value in integer Get function is rounded to nearest integer
1706           */
1707          *params = (GLint) roundf(obj->Sampler.LodBias);
1708          break;
1709       case GL_TEXTURE_CROP_RECT_OES:
1710          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1711             goto invalid_pname;
1712
1713          params[0] = obj->CropRect[0];
1714          params[1] = obj->CropRect[1];
1715          params[2] = obj->CropRect[2];
1716          params[3] = obj->CropRect[3];
1717          break;
1718       case GL_TEXTURE_SWIZZLE_R_EXT:
1719       case GL_TEXTURE_SWIZZLE_G_EXT:
1720       case GL_TEXTURE_SWIZZLE_B_EXT:
1721       case GL_TEXTURE_SWIZZLE_A_EXT:
1722          if ((!_mesa_is_desktop_gl(ctx)
1723               || !ctx->Extensions.EXT_texture_swizzle)
1724              && !_mesa_is_gles3(ctx))
1725             goto invalid_pname;
1726          *params = obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1727          break;
1728
1729       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1730          if ((!_mesa_is_desktop_gl(ctx)
1731               || !ctx->Extensions.EXT_texture_swizzle)
1732              && !_mesa_is_gles3(ctx))
1733             goto invalid_pname;
1734          COPY_4V(params, obj->Swizzle);
1735          break;
1736
1737       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1738          if (!_mesa_is_desktop_gl(ctx)
1739              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1740             goto invalid_pname;
1741          *params = (GLint) obj->Sampler.CubeMapSeamless;
1742          break;
1743
1744       case GL_TEXTURE_IMMUTABLE_FORMAT:
1745          *params = (GLint) obj->Immutable;
1746          break;
1747
1748       case GL_TEXTURE_IMMUTABLE_LEVELS:
1749          if (!_mesa_is_gles3(ctx))
1750             goto invalid_pname;
1751          *params = obj->ImmutableLevels;
1752          break;
1753
1754       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1755          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1756             goto invalid_pname;
1757          *params = obj->RequiredTextureImageUnits;
1758          break;
1759
1760       case GL_TEXTURE_SRGB_DECODE_EXT:
1761          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1762             goto invalid_pname;
1763          *params = obj->Sampler.sRGBDecode;
1764          break;
1765
1766       default:
1767          goto invalid_pname;
1768    }
1769
1770    /* no error if we get here */
1771    _mesa_unlock_texture(ctx, obj);
1772    return;
1773
1774 invalid_pname:
1775    _mesa_unlock_texture(ctx, obj);
1776    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
1777 }
1778
1779
1780 /** New in GL 3.0 */
1781 void GLAPIENTRY
1782 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1783 {
1784    struct gl_texture_object *texObj;
1785    GET_CURRENT_CONTEXT(ctx);
1786
1787    texObj = get_texobj(ctx, target, GL_TRUE);
1788    if (!texObj)
1789       return;
1790
1791    switch (pname) {
1792    case GL_TEXTURE_BORDER_COLOR:
1793       COPY_4V(params, texObj->Sampler.BorderColor.i);
1794       break;
1795    default:
1796       _mesa_GetTexParameteriv(target, pname, params);
1797    }
1798 }
1799
1800
1801 /** New in GL 3.0 */
1802 void GLAPIENTRY
1803 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1804 {
1805    struct gl_texture_object *texObj;
1806    GET_CURRENT_CONTEXT(ctx);
1807
1808    texObj = get_texobj(ctx, target, GL_TRUE);
1809    if (!texObj)
1810       return;
1811
1812    switch (pname) {
1813    case GL_TEXTURE_BORDER_COLOR:
1814       COPY_4V(params, texObj->Sampler.BorderColor.i);
1815       break;
1816    default:
1817       {
1818          GLint ip[4];
1819          _mesa_GetTexParameteriv(target, pname, ip);
1820          params[0] = ip[0];
1821          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1822              pname == GL_TEXTURE_CROP_RECT_OES) {
1823             params[1] = ip[1];
1824             params[2] = ip[2];
1825             params[3] = ip[3];
1826          }
1827       }
1828    }
1829 }