src/mesa/main/texparam.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.5
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file texparam.c
  28  *
  29  * glTexParameter-related functions
  30  */
  31
  32
  33 #include "main/glheader.h"
  34 #include "main/colormac.h"
  35 #include "main/context.h"
  36 #include "main/enums.h"
  37 #include "main/formats.h"
  38 #include "main/macros.h"
  39 #include "main/texcompress.h"
  40 #include "main/texparam.h"
  41 #include "main/teximage.h"
  42 #include "main/texstate.h"
  43 #include "shader/prog_instruction.h"
  44
  45
  46 /**
  47  * Check if a coordinate wrap mode is supported for the texture target.
  48  * \return GL_TRUE if legal, GL_FALSE otherwise
  49  */
  50 static GLboolean
  51 validate_texture_wrap_mode(GLcontext * ctx, GLenum target, GLenum wrap)
  52 {
  53    const struct gl_extensions * const e = & ctx->Extensions;
  54
  55    if (wrap == GL_CLAMP || wrap == GL_CLAMP_TO_EDGE ||
  56        (wrap == GL_CLAMP_TO_BORDER && e->ARB_texture_border_clamp)) {
  57       /* any texture target */
  58       return GL_TRUE;
  59    }
  60    else if (target != GL_TEXTURE_RECTANGLE_NV &&
  61             (wrap == GL_REPEAT ||
  62              (wrap == GL_MIRRORED_REPEAT &&
  63               e->ARB_texture_mirrored_repeat) ||
  64              (wrap == GL_MIRROR_CLAMP_EXT &&
  65               (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) ||
  66              (wrap == GL_MIRROR_CLAMP_TO_EDGE_EXT &&
  67               (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) ||
  68              (wrap == GL_MIRROR_CLAMP_TO_BORDER_EXT &&
  69               (e->EXT_texture_mirror_clamp)))) {
  70       /* non-rectangle texture */
  71       return GL_TRUE;
  72    }
  73
  74    _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)", wrap );
  75    return GL_FALSE;
  76 }
  77
  78
  79 /**
  80  * Get current texture object for given target.
  81  * Return NULL if any error (and record the error).
  82  * Note that this is different from _mesa_select_tex_object() in that proxy
  83  * targets are not accepted.
  84  * Only the glGetTexLevelParameter() functions accept proxy targets.
  85  */
  86 static struct gl_texture_object *
  87 get_texobj(GLcontext *ctx, GLenum target, GLboolean get)
  88 {
  89    struct gl_texture_unit *texUnit;
  90
  91    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
  92       _mesa_error(ctx, GL_INVALID_OPERATION,
  93                   "gl%sTexParameter(current unit)", get ? "Get" : "");
  94       return NULL;
  95    }
  96
  97    texUnit = _mesa_get_current_tex_unit(ctx);
  98
  99    switch (target) {
 100    case GL_TEXTURE_1D:
 101       return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 102    case GL_TEXTURE_2D:
 103       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 104    case GL_TEXTURE_3D:
 105       return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 106    case GL_TEXTURE_CUBE_MAP:
 107       if (ctx->Extensions.ARB_texture_cube_map) {
 108          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 109       }
 110       break;
 111    case GL_TEXTURE_RECTANGLE_NV:
 112       if (ctx->Extensions.NV_texture_rectangle) {
 113          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 114       }
 115       break;
 116    case GL_TEXTURE_1D_ARRAY_EXT:
 117       if (ctx->Extensions.MESA_texture_array) {
 118          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 119       }
 120       break;
 121    case GL_TEXTURE_2D_ARRAY_EXT:
 122       if (ctx->Extensions.MESA_texture_array) {
 123          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 124       }
 125       break;
 126    default:
 127       ;
 128    }
 129
 130    _mesa_error(ctx, GL_INVALID_ENUM,
 131                   "gl%sTexParameter(target)", get ? "Get" : "");
 132    return NULL;
 133 }
 134
 135
 136 /**
 137  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 138  * \return -1 if error.
 139  */
 140 static GLint
 141 comp_to_swizzle(GLenum comp)
 142 {
 143    switch (comp) {
 144    case GL_RED:
 145       return SWIZZLE_X;
 146    case GL_GREEN:
 147       return SWIZZLE_Y;
 148    case GL_BLUE:
 149       return SWIZZLE_Z;
 150    case GL_ALPHA:
 151       return SWIZZLE_W;
 152    case GL_ZERO:
 153       return SWIZZLE_ZERO;
 154    case GL_ONE:
 155       return SWIZZLE_ONE;
 156    default:
 157       return -1;
 158    }
 159 }
 160
 161
 162 static void
 163 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 164 {
 165    ASSERT(comp < 4);
 166    ASSERT(swz <= SWIZZLE_NIL);
 167    {
 168       GLuint mask = 0x7 << (3 * comp);
 169       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 170       *swizzle = s;
 171    }
 172 }
 173
 174
 175 /**
 176  * This is called just prior to changing any texture object state.
 177  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 178  * state flag and then mark the texture object as 'incomplete' so that any
 179  * per-texture derived state gets recomputed.
 180  */
 181 static INLINE void
 182 flush(GLcontext *ctx, struct gl_texture_object *texObj)
 183 {
 184    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 185    texObj->_Complete = GL_FALSE;
 186 }
 187
 188
 189 /**
 190  * Set an integer-valued texture parameter
 191  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 192  */
 193 static GLboolean
 194 set_tex_parameteri(GLcontext *ctx,
 195                    struct gl_texture_object *texObj,
 196                    GLenum pname, const GLint *params)
 197 {
 198    switch (pname) {
 199    case GL_TEXTURE_MIN_FILTER:
 200       if (texObj->MinFilter == params[0])
 201          return GL_FALSE;
 202       switch (params[0]) {
 203       case GL_NEAREST:
 204       case GL_LINEAR:
 205          flush(ctx, texObj);
 206          texObj->MinFilter = params[0];
 207          return GL_TRUE;
 208       case GL_NEAREST_MIPMAP_NEAREST:
 209       case GL_LINEAR_MIPMAP_NEAREST:
 210       case GL_NEAREST_MIPMAP_LINEAR:
 211       case GL_LINEAR_MIPMAP_LINEAR:
 212          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV) {
 213             flush(ctx, texObj);
 214             texObj->MinFilter = params[0];
 215             return GL_TRUE;
 216          }
 217          /* fall-through */
 218       default:
 219          _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)",
 220                       params[0] );
 221       }
 222       return GL_FALSE;
 223
 224    case GL_TEXTURE_MAG_FILTER:
 225       if (texObj->MagFilter == params[0])
 226          return GL_FALSE;
 227       switch (params[0]) {
 228       case GL_NEAREST:
 229       case GL_LINEAR:
 230          flush(ctx, texObj);
 231          texObj->MagFilter = params[0];
 232          return GL_TRUE;
 233       default:
 234          _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)",
 235                       params[0]);
 236       }
 237       return GL_FALSE;
 238
 239    case GL_TEXTURE_WRAP_S:
 240       if (texObj->WrapS == params[0])
 241          return GL_FALSE;
 242       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 243          flush(ctx, texObj);
 244          texObj->WrapS = params[0];
 245          return GL_TRUE;
 246       }
 247       return GL_FALSE;
 248
 249    case GL_TEXTURE_WRAP_T:
 250       if (texObj->WrapT == params[0])
 251          return GL_FALSE;
 252       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 253          flush(ctx, texObj);
 254          texObj->WrapT = params[0];
 255          return GL_TRUE;
 256       }
 257       return GL_FALSE;
 258
 259    case GL_TEXTURE_WRAP_R:
 260       if (texObj->WrapR == params[0])
 261          return GL_FALSE;
 262       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 263          flush(ctx, texObj);
 264          texObj->WrapR = params[0];
 265          return GL_TRUE;
 266       }
 267       return GL_FALSE;
 268
 269    case GL_TEXTURE_BASE_LEVEL:
 270       if (texObj->BaseLevel == params[0])
 271          return GL_FALSE;
 272       if (params[0] < 0 ||
 273           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 274          _mesa_error(ctx, GL_INVALID_VALUE,
 275                      "glTexParameter(param=%d)", params[0]);
 276          return GL_FALSE;
 277       }
 278       flush(ctx, texObj);
 279       texObj->BaseLevel = params[0];
 280       return GL_TRUE;
 281
 282    case GL_TEXTURE_MAX_LEVEL:
 283       if (texObj->MaxLevel == params[0])
 284          return GL_FALSE;
 285       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 286          _mesa_error(ctx, GL_INVALID_OPERATION,
 287                      "glTexParameter(param=%d)", params[0]);
 288          return GL_FALSE;
 289       }
 290       flush(ctx, texObj);
 291       texObj->MaxLevel = params[0];
 292       return GL_TRUE;
 293
 294    case GL_GENERATE_MIPMAP_SGIS:
 295       if (ctx->Extensions.SGIS_generate_mipmap) {
 296          if (texObj->GenerateMipmap != params[0]) {
 297             flush(ctx, texObj);
 298             texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 299             return GL_TRUE;
 300          }
 301          return GL_FALSE;
 302       }
 303       else {
 304          _mesa_error(ctx, GL_INVALID_ENUM,
 305                      "glTexParameter(pname=GL_GENERATE_MIPMAP_SGIS)");
 306       }
 307       return GL_FALSE;
 308
 309    case GL_TEXTURE_COMPARE_MODE_ARB:
 310       if (ctx->Extensions.ARB_shadow &&
 311           (params[0] == GL_NONE ||
 312            params[0] == GL_COMPARE_R_TO_TEXTURE_ARB)) {
 313          if (texObj->CompareMode != params[0]) {
 314             flush(ctx, texObj);
 315             texObj->CompareMode = params[0];
 316             return GL_TRUE;
 317          }
 318          return GL_FALSE;
 319       }
 320       else {
 321          _mesa_error(ctx, GL_INVALID_ENUM,
 322                      "glTexParameter(GL_TEXTURE_COMPARE_MODE_ARB)");
 323       }
 324       return GL_FALSE;
 325
 326    case GL_TEXTURE_COMPARE_FUNC_ARB:
 327       if (ctx->Extensions.ARB_shadow) {
 328          if (texObj->CompareFunc == params[0])
 329             return GL_FALSE;
 330          switch (params[0]) {
 331          case GL_LEQUAL:
 332          case GL_GEQUAL:
 333             flush(ctx, texObj);
 334             texObj->CompareFunc = params[0];
 335             return GL_TRUE;
 336          case GL_EQUAL:
 337          case GL_NOTEQUAL:
 338          case GL_LESS:
 339          case GL_GREATER:
 340          case GL_ALWAYS:
 341          case GL_NEVER:
 342             if (ctx->Extensions.EXT_shadow_funcs) {
 343                flush(ctx, texObj);
 344                texObj->CompareFunc = params[0];
 345                return GL_TRUE;
 346             }
 347             /* fall-through */
 348          default:
 349             _mesa_error(ctx, GL_INVALID_ENUM,
 350                         "glTexParameter(GL_TEXTURE_COMPARE_FUNC_ARB)");
 351          }
 352       }
 353       else {
 354          _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 355       }
 356       return GL_FALSE;
 357
 358    case GL_DEPTH_TEXTURE_MODE_ARB:
 359       if (ctx->Extensions.ARB_depth_texture &&
 360           (params[0] == GL_LUMINANCE ||
 361            params[0] == GL_INTENSITY ||
 362            params[0] == GL_ALPHA)) {
 363          if (texObj->DepthMode != params[0]) {
 364             flush(ctx, texObj);
 365             texObj->DepthMode = params[0];
 366             return GL_TRUE;
 367          }
 368       }
 369       else {
 370          _mesa_error(ctx, GL_INVALID_ENUM,
 371                      "glTexParameter(GL_DEPTH_TEXTURE_MODE_ARB)");
 372       }
 373       return GL_FALSE;
 374
 375 #ifdef FEATURE_OES_draw_texture
 376    case GL_TEXTURE_CROP_RECT_OES:
 377       texObj->CropRect[0] = params[0];
 378       texObj->CropRect[1] = params[1];
 379       texObj->CropRect[2] = params[2];
 380       texObj->CropRect[3] = params[3];
 381       return GL_TRUE;
 382 #endif
 383
 384    case GL_TEXTURE_SWIZZLE_R_EXT:
 385    case GL_TEXTURE_SWIZZLE_G_EXT:
 386    case GL_TEXTURE_SWIZZLE_B_EXT:
 387    case GL_TEXTURE_SWIZZLE_A_EXT:
 388       if (ctx->Extensions.EXT_texture_swizzle) {
 389          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 390          const GLint swz = comp_to_swizzle(params[0]);
 391          if (swz < 0) {
 392             _mesa_error(ctx, GL_INVALID_OPERATION,
 393                         "glTexParameter(swizzle 0x%x)", params[0]);
 394             return GL_FALSE;
 395          }
 396          ASSERT(comp < 4);
 397          if (swz >= 0) {
 398             flush(ctx, texObj);
 399             texObj->Swizzle[comp] = params[0];
 400             set_swizzle_component(&texObj->_Swizzle, comp, swz);
 401             return GL_TRUE;
 402          }
 403       }
 404       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 405       return GL_FALSE;
 406
 407    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 408       if (ctx->Extensions.EXT_texture_swizzle) {
 409          GLuint comp;
 410          flush(ctx, texObj);
 411          for (comp = 0; comp < 4; comp++) {
 412             const GLint swz = comp_to_swizzle(params[comp]);
 413             if (swz >= 0) {
 414                texObj->Swizzle[comp] = params[comp];
 415                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 416             }
 417             else {
 418                _mesa_error(ctx, GL_INVALID_OPERATION,
 419                            "glTexParameter(swizzle 0x%x)", params[comp]);
 420                return GL_FALSE;
 421             }
 422          }
 423          return GL_TRUE;
 424       }
 425       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 426       return GL_FALSE;
 427
 428    default:
 429       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 430    }
 431    return GL_FALSE;
 432 }
 433
 434
 435 /**
 436  * Set a float-valued texture parameter
 437  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 438  */
 439 static GLboolean
 440 set_tex_parameterf(GLcontext *ctx,
 441                    struct gl_texture_object *texObj,
 442                    GLenum pname, const GLfloat *params)
 443 {
 444    switch (pname) {
 445    case GL_TEXTURE_MIN_LOD:
 446       if (texObj->MinLod == params[0])
 447          return GL_FALSE;
 448       flush(ctx, texObj);
 449       texObj->MinLod = params[0];
 450       return GL_TRUE;
 451
 452    case GL_TEXTURE_MAX_LOD:
 453       if (texObj->MaxLod == params[0])
 454          return GL_FALSE;
 455       flush(ctx, texObj);
 456       texObj->MaxLod = params[0];
 457       return GL_TRUE;
 458
 459    case GL_TEXTURE_PRIORITY:
 460       flush(ctx, texObj);
 461       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 462       return GL_TRUE;
 463
 464    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 465       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 466          if (texObj->MaxAnisotropy == params[0])
 467             return GL_FALSE;
 468          if (params[0] < 1.0) {
 469             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 470             return GL_FALSE;
 471          }
 472          flush(ctx, texObj);
 473          /* clamp to max, that's what NVIDIA does */
 474          texObj->MaxAnisotropy = MIN2(params[0],
 475                                       ctx->Const.MaxTextureMaxAnisotropy);
 476          return GL_TRUE;
 477       }
 478       else {
 479          static GLuint count = 0;
 480          if (count++ < 10)
 481             _mesa_error(ctx, GL_INVALID_ENUM,
 482                         "glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)");
 483       }
 484       return GL_FALSE;
 485
 486    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 487       if (ctx->Extensions.ARB_shadow_ambient) {
 488          if (texObj->CompareFailValue != params[0]) {
 489             flush(ctx, texObj);
 490             texObj->CompareFailValue = CLAMP(params[0], 0.0F, 1.0F);
 491             return GL_TRUE;
 492          }
 493       }
 494       else {
 495          _mesa_error(ctx, GL_INVALID_ENUM,
 496                     "glTexParameter(pname=GL_TEXTURE_COMPARE_FAIL_VALUE_ARB)");
 497       }
 498       return GL_FALSE;
 499
 500    case GL_TEXTURE_LOD_BIAS:
 501       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias */
 502       if (ctx->Extensions.EXT_texture_lod_bias) {
 503          if (texObj->LodBias != params[0]) {
 504             flush(ctx, texObj);
 505             texObj->LodBias = params[0];
 506             return GL_TRUE;
 507          }
 508          return GL_FALSE;
 509       }
 510       break;
 511
 512    case GL_TEXTURE_BORDER_COLOR:
 513       flush(ctx, texObj);
 514       COPY_4V(texObj->BorderColor.f, params);
 515       return GL_TRUE;
 516
 517    default:
 518       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 519    }
 520    return GL_FALSE;
 521 }
 522
 523
 524 void GLAPIENTRY
 525 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 526 {
 527    GLboolean need_update;
 528    struct gl_texture_object *texObj;
 529    GET_CURRENT_CONTEXT(ctx);
 530    ASSERT_OUTSIDE_BEGIN_END(ctx);
 531
 532    texObj = get_texobj(ctx, target, GL_FALSE);
 533    if (!texObj)
 534       return;
 535
 536    switch (pname) {
 537    case GL_TEXTURE_MIN_FILTER:
 538    case GL_TEXTURE_MAG_FILTER:
 539    case GL_TEXTURE_WRAP_S:
 540    case GL_TEXTURE_WRAP_T:
 541    case GL_TEXTURE_WRAP_R:
 542    case GL_TEXTURE_BASE_LEVEL:
 543    case GL_TEXTURE_MAX_LEVEL:
 544    case GL_GENERATE_MIPMAP_SGIS:
 545    case GL_TEXTURE_COMPARE_MODE_ARB:
 546    case GL_TEXTURE_COMPARE_FUNC_ARB:
 547    case GL_DEPTH_TEXTURE_MODE_ARB:
 548       {
 549          /* convert float param to int */
 550          GLint p[4];
 551          p[0] = (GLint) param;
 552          p[1] = p[2] = p[3] = 0;
 553          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 554       }
 555       break;
 556    default:
 557       {
 558          /* this will generate an error if pname is illegal */
 559          GLfloat p[4];
 560          p[0] = param;
 561          p[1] = p[2] = p[3] = 0.0F;
 562          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 563       }
 564    }
 565
 566    if (ctx->Driver.TexParameter && need_update) {
 567       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 568    }
 569 }
 570
 571
 572 void GLAPIENTRY
 573 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 574 {
 575    GLboolean need_update;
 576    struct gl_texture_object *texObj;
 577    GET_CURRENT_CONTEXT(ctx);
 578    ASSERT_OUTSIDE_BEGIN_END(ctx);
 579
 580    texObj = get_texobj(ctx, target, GL_FALSE);
 581    if (!texObj)
 582       return;
 583
 584    switch (pname) {
 585    case GL_TEXTURE_MIN_FILTER:
 586    case GL_TEXTURE_MAG_FILTER:
 587    case GL_TEXTURE_WRAP_S:
 588    case GL_TEXTURE_WRAP_T:
 589    case GL_TEXTURE_WRAP_R:
 590    case GL_TEXTURE_BASE_LEVEL:
 591    case GL_TEXTURE_MAX_LEVEL:
 592    case GL_GENERATE_MIPMAP_SGIS:
 593    case GL_TEXTURE_COMPARE_MODE_ARB:
 594    case GL_TEXTURE_COMPARE_FUNC_ARB:
 595    case GL_DEPTH_TEXTURE_MODE_ARB:
 596       {
 597          /* convert float param to int */
 598          GLint p[4];
 599          p[0] = (GLint) params[0];
 600          p[1] = p[2] = p[3] = 0;
 601          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 602       }
 603       break;
 604
 605 #ifdef FEATURE_OES_draw_texture
 606    case GL_TEXTURE_CROP_RECT_OES:
 607       {
 608          /* convert float params to int */
 609          GLint iparams[4];
 610          iparams[0] = (GLint) params[0];
 611          iparams[1] = (GLint) params[1];
 612          iparams[2] = (GLint) params[2];
 613          iparams[3] = (GLint) params[3];
 614          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 615       }
 616       break;
 617 #endif
 618
 619    default:
 620       /* this will generate an error if pname is illegal */
 621       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 622    }
 623
 624    if (ctx->Driver.TexParameter && need_update) {
 625       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 626    }
 627 }
 628
 629
 630 void GLAPIENTRY
 631 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 632 {
 633    GLboolean need_update;
 634    struct gl_texture_object *texObj;
 635    GET_CURRENT_CONTEXT(ctx);
 636    ASSERT_OUTSIDE_BEGIN_END(ctx);
 637
 638    texObj = get_texobj(ctx, target, GL_FALSE);
 639    if (!texObj)
 640       return;
 641
 642    switch (pname) {
 643    case GL_TEXTURE_MIN_LOD:
 644    case GL_TEXTURE_MAX_LOD:
 645    case GL_TEXTURE_PRIORITY:
 646    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 647    case GL_TEXTURE_LOD_BIAS:
 648    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 649       {
 650          GLfloat fparam[4];
 651          fparam[0] = (GLfloat) param;
 652          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 653          /* convert int param to float */
 654          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 655       }
 656       break;
 657    default:
 658       /* this will generate an error if pname is illegal */
 659       {
 660          GLint iparam[4];
 661          iparam[0] = param;
 662          iparam[1] = iparam[2] = iparam[3] = 0;
 663          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 664       }
 665    }
 666
 667    if (ctx->Driver.TexParameter && need_update) {
 668       GLfloat fparam = (GLfloat) param;
 669       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 670    }
 671 }
 672
 673
 674 void GLAPIENTRY
 675 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 676 {
 677    GLboolean need_update;
 678    struct gl_texture_object *texObj;
 679    GET_CURRENT_CONTEXT(ctx);
 680    ASSERT_OUTSIDE_BEGIN_END(ctx);
 681
 682    texObj = get_texobj(ctx, target, GL_FALSE);
 683    if (!texObj)
 684       return;
 685
 686    switch (pname) {
 687    case GL_TEXTURE_BORDER_COLOR:
 688       {
 689          /* convert int params to float */
 690          GLfloat fparams[4];
 691          fparams[0] = INT_TO_FLOAT(params[0]);
 692          fparams[1] = INT_TO_FLOAT(params[1]);
 693          fparams[2] = INT_TO_FLOAT(params[2]);
 694          fparams[3] = INT_TO_FLOAT(params[3]);
 695          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 696       }
 697       break;
 698    case GL_TEXTURE_MIN_LOD:
 699    case GL_TEXTURE_MAX_LOD:
 700    case GL_TEXTURE_PRIORITY:
 701    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 702    case GL_TEXTURE_LOD_BIAS:
 703    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 704       {
 705          /* convert int param to float */
 706          GLfloat fparams[4];
 707          fparams[0] = (GLfloat) params[0];
 708          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 709          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 710       }
 711       break;
 712    default:
 713       /* this will generate an error if pname is illegal */
 714       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 715    }
 716
 717    if (ctx->Driver.TexParameter && need_update) {
 718       GLfloat fparams[4];
 719       fparams[0] = INT_TO_FLOAT(params[0]);
 720       if (pname == GL_TEXTURE_BORDER_COLOR ||
 721           pname == GL_TEXTURE_CROP_RECT_OES) {
 722          fparams[1] = INT_TO_FLOAT(params[1]);
 723          fparams[2] = INT_TO_FLOAT(params[2]);
 724          fparams[3] = INT_TO_FLOAT(params[3]);
 725       }
 726       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 727    }
 728 }
 729
 730
 731 void GLAPIENTRY
 732 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
 733                               GLenum pname, GLfloat *params )
 734 {
 735    GLint iparam;
 736    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
 737    *params = (GLfloat) iparam;
 738 }
 739
 740
 741 void GLAPIENTRY
 742 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
 743                               GLenum pname, GLint *params )
 744 {
 745    const struct gl_texture_unit *texUnit;
 746    struct gl_texture_object *texObj;
 747    const struct gl_texture_image *img = NULL;
 748    GLboolean isProxy;
 749    GLint maxLevels;
 750    gl_format texFormat;
 751    GET_CURRENT_CONTEXT(ctx);
 752    ASSERT_OUTSIDE_BEGIN_END(ctx);
 753
 754    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
 755       _mesa_error(ctx, GL_INVALID_OPERATION,
 756                   "glGetTexLevelParameteriv(current unit)");
 757       return;
 758    }
 759
 760    texUnit = _mesa_get_current_tex_unit(ctx);
 761
 762    /* this will catch bad target values */
 763    maxLevels = _mesa_max_texture_levels(ctx, target);
 764    if (maxLevels == 0) {
 765       _mesa_error(ctx, GL_INVALID_ENUM,
 766                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
 767       return;
 768    }
 769
 770    if (level < 0 || level >= maxLevels) {
 771       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
 772       return;
 773    }
 774
 775    texObj = _mesa_select_tex_object(ctx, texUnit, target);
 776    _mesa_lock_texture(ctx, texObj);
 777
 778    img = _mesa_select_tex_image(ctx, texObj, target, level);
 779    if (!img || !img->TexFormat) {
 780       /* undefined texture image */
 781       if (pname == GL_TEXTURE_COMPONENTS)
 782          *params = 1;
 783       else
 784          *params = 0;
 785       goto out;
 786    }
 787
 788    texFormat = img->TexFormat;
 789
 790    isProxy = _mesa_is_proxy_texture(target);
 791
 792    switch (pname) {
 793       case GL_TEXTURE_WIDTH:
 794          *params = img->Width;
 795          break;
 796       case GL_TEXTURE_HEIGHT:
 797          *params = img->Height;
 798          break;
 799       case GL_TEXTURE_DEPTH:
 800          *params = img->Depth;
 801          break;
 802       case GL_TEXTURE_INTERNAL_FORMAT:
 803          if (_mesa_is_format_compressed(img->TexFormat)) {
 804             /* need to return the actual compressed format */
 805             *params = _mesa_compressed_format_to_glenum(ctx, img->TexFormat);
 806          }
 807          else {
 808             /* return the user's requested internal format */
 809             *params = img->InternalFormat;
 810          }
 811          break;
 812       case GL_TEXTURE_BORDER:
 813          *params = img->Border;
 814          break;
 815       case GL_TEXTURE_RED_SIZE:
 816       case GL_TEXTURE_GREEN_SIZE:
 817       case GL_TEXTURE_BLUE_SIZE:
 818          if (img->_BaseFormat == GL_RGB || img->_BaseFormat == GL_RGBA)
 819             *params = _mesa_get_format_bits(texFormat, pname);
 820          else
 821             *params = 0;
 822          break;
 823       case GL_TEXTURE_ALPHA_SIZE:
 824          if (img->_BaseFormat == GL_ALPHA ||
 825              img->_BaseFormat == GL_LUMINANCE_ALPHA ||
 826              img->_BaseFormat == GL_RGBA)
 827             *params = _mesa_get_format_bits(texFormat, pname);
 828          else
 829             *params = 0;
 830          break;
 831       case GL_TEXTURE_INTENSITY_SIZE:
 832          if (img->_BaseFormat != GL_INTENSITY)
 833             *params = 0;
 834          else {
 835             *params = _mesa_get_format_bits(texFormat, pname);
 836             if (*params == 0) {
 837                /* intensity probably stored as rgb texture */
 838                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 839                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 840             }
 841          }
 842          break;
 843       case GL_TEXTURE_LUMINANCE_SIZE:
 844          if (img->_BaseFormat != GL_LUMINANCE &&
 845              img->_BaseFormat != GL_LUMINANCE_ALPHA)
 846             *params = 0;
 847          else {
 848             *params = _mesa_get_format_bits(texFormat, pname);
 849             if (*params == 0) {
 850                /* luminance probably stored as rgb texture */
 851                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 852                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 853             }
 854          }
 855          break;
 856       case GL_TEXTURE_INDEX_SIZE_EXT:
 857          if (img->_BaseFormat == GL_COLOR_INDEX)
 858             *params = _mesa_get_format_bits(texFormat, pname);
 859          else
 860             *params = 0;
 861          break;
 862       case GL_TEXTURE_DEPTH_SIZE_ARB:
 863          if (ctx->Extensions.ARB_depth_texture)
 864             *params = _mesa_get_format_bits(texFormat, pname);
 865          else
 866             _mesa_error(ctx, GL_INVALID_ENUM,
 867                         "glGetTexLevelParameter[if]v(pname)");
 868          break;
 869       case GL_TEXTURE_STENCIL_SIZE_EXT:
 870          if (ctx->Extensions.EXT_packed_depth_stencil ||
 871              ctx->Extensions.ARB_framebuffer_object) {
 872             *params = _mesa_get_format_bits(texFormat, pname);
 873          }
 874          else {
 875             _mesa_error(ctx, GL_INVALID_ENUM,
 876                         "glGetTexLevelParameter[if]v(pname)");
 877          }
 878          break;
 879
 880       /* GL_ARB_texture_compression */
 881       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
 882          if (_mesa_is_format_compressed(img->TexFormat) && !isProxy) {
 883             *params = _mesa_format_image_size(texFormat, img->Width,
 884                                               img->Height, img->Depth);
 885          }
 886          else {
 887             _mesa_error(ctx, GL_INVALID_OPERATION,
 888                         "glGetTexLevelParameter[if]v(pname)");
 889          }
 890          break;
 891       case GL_TEXTURE_COMPRESSED:
 892          *params = (GLint) _mesa_is_format_compressed(img->TexFormat);
 893          break;
 894
 895       /* GL_ARB_texture_float */
 896       case GL_TEXTURE_RED_TYPE_ARB:
 897          if (ctx->Extensions.ARB_texture_float) {
 898             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE) ?
 899                _mesa_get_format_datatype(texFormat) : GL_NONE;
 900          }
 901          else {
 902             _mesa_error(ctx, GL_INVALID_ENUM,
 903                         "glGetTexLevelParameter[if]v(pname)");
 904          }
 905          break;
 906       case GL_TEXTURE_GREEN_TYPE_ARB:
 907          if (ctx->Extensions.ARB_texture_float) {
 908             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE) ?
 909                _mesa_get_format_datatype(texFormat) : GL_NONE;
 910          }
 911          else {
 912             _mesa_error(ctx, GL_INVALID_ENUM,
 913                         "glGetTexLevelParameter[if]v(pname)");
 914          }
 915          break;
 916       case GL_TEXTURE_BLUE_TYPE_ARB:
 917          if (ctx->Extensions.ARB_texture_float) {
 918             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_BLUE_SIZE) ?
 919                _mesa_get_format_datatype(texFormat) : GL_NONE;
 920          }
 921          else {
 922             _mesa_error(ctx, GL_INVALID_ENUM,
 923                         "glGetTexLevelParameter[if]v(pname)");
 924          }
 925          break;
 926       case GL_TEXTURE_ALPHA_TYPE_ARB:
 927          if (ctx->Extensions.ARB_texture_float) {
 928             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_ALPHA_SIZE) ?
 929                _mesa_get_format_datatype(texFormat) : GL_NONE;
 930          }
 931          else {
 932             _mesa_error(ctx, GL_INVALID_ENUM,
 933                         "glGetTexLevelParameter[if]v(pname)");
 934          }
 935          break;
 936       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
 937          if (ctx->Extensions.ARB_texture_float) {
 938             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_LUMINANCE_SIZE) ?
 939                _mesa_get_format_datatype(texFormat) : GL_NONE;
 940          }
 941          else {
 942             _mesa_error(ctx, GL_INVALID_ENUM,
 943                         "glGetTexLevelParameter[if]v(pname)");
 944          }
 945          break;
 946       case GL_TEXTURE_INTENSITY_TYPE_ARB:
 947          if (ctx->Extensions.ARB_texture_float) {
 948             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_INTENSITY_SIZE) ?
 949                _mesa_get_format_datatype(texFormat) : GL_NONE;
 950          }
 951          else {
 952             _mesa_error(ctx, GL_INVALID_ENUM,
 953                         "glGetTexLevelParameter[if]v(pname)");
 954          }
 955          break;
 956       case GL_TEXTURE_DEPTH_TYPE_ARB:
 957          if (ctx->Extensions.ARB_texture_float) {
 958             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_DEPTH_SIZE) ?
 959                _mesa_get_format_datatype(texFormat) : GL_NONE;
 960          }
 961          else {
 962             _mesa_error(ctx, GL_INVALID_ENUM,
 963                         "glGetTexLevelParameter[if]v(pname)");
 964          }
 965          break;
 966
 967       default:
 968          _mesa_error(ctx, GL_INVALID_ENUM,
 969                      "glGetTexLevelParameter[if]v(pname)");
 970    }
 971
 972  out:
 973    _mesa_unlock_texture(ctx, texObj);
 974 }
 975
 976
 977
 978 void GLAPIENTRY
 979 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
 980 {
 981    struct gl_texture_object *obj;
 982    GLboolean error = GL_FALSE;
 983    GET_CURRENT_CONTEXT(ctx);
 984    ASSERT_OUTSIDE_BEGIN_END(ctx);
 985
 986    obj = get_texobj(ctx, target, GL_TRUE);
 987    if (!obj)
 988       return;
 989
 990    _mesa_lock_texture(ctx, obj);
 991    switch (pname) {
 992       case GL_TEXTURE_MAG_FILTER:
 993          *params = ENUM_TO_FLOAT(obj->MagFilter);
 994          break;
 995       case GL_TEXTURE_MIN_FILTER:
 996          *params = ENUM_TO_FLOAT(obj->MinFilter);
 997          break;
 998       case GL_TEXTURE_WRAP_S:
 999          *params = ENUM_TO_FLOAT(obj->WrapS);
1000          break;
1001       case GL_TEXTURE_WRAP_T:
1002          *params = ENUM_TO_FLOAT(obj->WrapT);
1003          break;
1004       case GL_TEXTURE_WRAP_R:
1005          *params = ENUM_TO_FLOAT(obj->WrapR);
1006          break;
1007       case GL_TEXTURE_BORDER_COLOR:
1008          params[0] = CLAMP(obj->BorderColor.f[0], 0.0F, 1.0F);
1009          params[1] = CLAMP(obj->BorderColor.f[1], 0.0F, 1.0F);
1010          params[2] = CLAMP(obj->BorderColor.f[2], 0.0F, 1.0F);
1011          params[3] = CLAMP(obj->BorderColor.f[3], 0.0F, 1.0F);
1012          break;
1013       case GL_TEXTURE_RESIDENT:
1014          {
1015             GLboolean resident;
1016             if (ctx->Driver.IsTextureResident)
1017                resident = ctx->Driver.IsTextureResident(ctx, obj);
1018             else
1019                resident = GL_TRUE;
1020             *params = ENUM_TO_FLOAT(resident);
1021          }
1022          break;
1023       case GL_TEXTURE_PRIORITY:
1024          *params = obj->Priority;
1025          break;
1026       case GL_TEXTURE_MIN_LOD:
1027          *params = obj->MinLod;
1028          break;
1029       case GL_TEXTURE_MAX_LOD:
1030          *params = obj->MaxLod;
1031          break;
1032       case GL_TEXTURE_BASE_LEVEL:
1033          *params = (GLfloat) obj->BaseLevel;
1034          break;
1035       case GL_TEXTURE_MAX_LEVEL:
1036          *params = (GLfloat) obj->MaxLevel;
1037          break;
1038       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1039          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1040             *params = obj->MaxAnisotropy;
1041          }
1042          else
1043             error = GL_TRUE;
1044          break;
1045       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1046          if (ctx->Extensions.ARB_shadow_ambient) {
1047             *params = obj->CompareFailValue;
1048          }
1049          else
1050             error = GL_TRUE;
1051          break;
1052       case GL_GENERATE_MIPMAP_SGIS:
1053          if (ctx->Extensions.SGIS_generate_mipmap) {
1054             *params = (GLfloat) obj->GenerateMipmap;
1055          }
1056          else
1057             error = GL_TRUE;
1058          break;
1059       case GL_TEXTURE_COMPARE_MODE_ARB:
1060          if (ctx->Extensions.ARB_shadow) {
1061             *params = (GLfloat) obj->CompareMode;
1062          }
1063          else
1064             error = GL_TRUE;
1065          break;
1066       case GL_TEXTURE_COMPARE_FUNC_ARB:
1067          if (ctx->Extensions.ARB_shadow) {
1068             *params = (GLfloat) obj->CompareFunc;
1069          }
1070          else
1071             error = GL_TRUE;
1072          break;
1073       case GL_DEPTH_TEXTURE_MODE_ARB:
1074          if (ctx->Extensions.ARB_depth_texture) {
1075             *params = (GLfloat) obj->DepthMode;
1076          }
1077          else
1078             error = GL_TRUE;
1079          break;
1080       case GL_TEXTURE_LOD_BIAS:
1081          if (ctx->Extensions.EXT_texture_lod_bias) {
1082             *params = obj->LodBias;
1083          }
1084          else
1085             error = GL_TRUE;
1086          break;
1087 #ifdef FEATURE_OES_draw_texture
1088       case GL_TEXTURE_CROP_RECT_OES:
1089          params[0] = obj->CropRect[0];
1090          params[1] = obj->CropRect[1];
1091          params[2] = obj->CropRect[2];
1092          params[3] = obj->CropRect[3];
1093          break;
1094 #endif
1095
1096       case GL_TEXTURE_SWIZZLE_R_EXT:
1097       case GL_TEXTURE_SWIZZLE_G_EXT:
1098       case GL_TEXTURE_SWIZZLE_B_EXT:
1099       case GL_TEXTURE_SWIZZLE_A_EXT:
1100          if (ctx->Extensions.EXT_texture_swizzle) {
1101             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1102             *params = (GLfloat) obj->Swizzle[comp];
1103          }
1104          else {
1105             error = GL_TRUE;
1106          }
1107          break;
1108
1109       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1110          if (ctx->Extensions.EXT_texture_swizzle) {
1111             GLuint comp;
1112             for (comp = 0; comp < 4; comp++) {
1113                params[comp] = (GLfloat) obj->Swizzle[comp];
1114             }
1115          }
1116          else {
1117             error = GL_TRUE;
1118          }
1119          break;
1120
1121       default:
1122          error = GL_TRUE;
1123          break;
1124    }
1125
1126    if (error)
1127       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)",
1128                   pname);
1129
1130    _mesa_unlock_texture(ctx, obj);
1131 }
1132
1133
1134 void GLAPIENTRY
1135 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1136 {
1137    struct gl_texture_object *obj;
1138    GLboolean error = GL_FALSE;
1139    GET_CURRENT_CONTEXT(ctx);
1140    ASSERT_OUTSIDE_BEGIN_END(ctx);
1141
1142     obj = get_texobj(ctx, target, GL_TRUE);
1143     if (!obj)
1144        return;
1145
1146    _mesa_lock_texture(ctx, obj);
1147    switch (pname) {
1148       case GL_TEXTURE_MAG_FILTER:
1149          *params = (GLint) obj->MagFilter;
1150          break;;
1151       case GL_TEXTURE_MIN_FILTER:
1152          *params = (GLint) obj->MinFilter;
1153          break;;
1154       case GL_TEXTURE_WRAP_S:
1155          *params = (GLint) obj->WrapS;
1156          break;;
1157       case GL_TEXTURE_WRAP_T:
1158          *params = (GLint) obj->WrapT;
1159          break;;
1160       case GL_TEXTURE_WRAP_R:
1161          *params = (GLint) obj->WrapR;
1162          break;;
1163       case GL_TEXTURE_BORDER_COLOR:
1164          {
1165             GLfloat b[4];
1166             b[0] = CLAMP(obj->BorderColor.f[0], 0.0F, 1.0F);
1167             b[1] = CLAMP(obj->BorderColor.f[1], 0.0F, 1.0F);
1168             b[2] = CLAMP(obj->BorderColor.f[2], 0.0F, 1.0F);
1169             b[3] = CLAMP(obj->BorderColor.f[3], 0.0F, 1.0F);
1170             params[0] = FLOAT_TO_INT(b[0]);
1171             params[1] = FLOAT_TO_INT(b[1]);
1172             params[2] = FLOAT_TO_INT(b[2]);
1173             params[3] = FLOAT_TO_INT(b[3]);
1174          }
1175          break;;
1176       case GL_TEXTURE_RESIDENT:
1177          {
1178             GLboolean resident;
1179             if (ctx->Driver.IsTextureResident)
1180                resident = ctx->Driver.IsTextureResident(ctx, obj);
1181             else
1182                resident = GL_TRUE;
1183             *params = (GLint) resident;
1184          }
1185          break;;
1186       case GL_TEXTURE_PRIORITY:
1187          *params = FLOAT_TO_INT(obj->Priority);
1188          break;;
1189       case GL_TEXTURE_MIN_LOD:
1190          *params = (GLint) obj->MinLod;
1191          break;;
1192       case GL_TEXTURE_MAX_LOD:
1193          *params = (GLint) obj->MaxLod;
1194          break;;
1195       case GL_TEXTURE_BASE_LEVEL:
1196          *params = obj->BaseLevel;
1197          break;;
1198       case GL_TEXTURE_MAX_LEVEL:
1199          *params = obj->MaxLevel;
1200          break;;
1201       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1202          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1203             *params = (GLint) obj->MaxAnisotropy;
1204          }
1205          else {
1206             error = GL_TRUE;
1207          }
1208          break;
1209       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1210          if (ctx->Extensions.ARB_shadow_ambient) {
1211             *params = (GLint) FLOAT_TO_INT(obj->CompareFailValue);
1212          }
1213          else {
1214             error = GL_TRUE;
1215          }
1216          break;
1217       case GL_GENERATE_MIPMAP_SGIS:
1218          if (ctx->Extensions.SGIS_generate_mipmap) {
1219             *params = (GLint) obj->GenerateMipmap;
1220          }
1221          else {
1222             error = GL_TRUE;
1223          }
1224          break;
1225       case GL_TEXTURE_COMPARE_MODE_ARB:
1226          if (ctx->Extensions.ARB_shadow) {
1227             *params = (GLint) obj->CompareMode;
1228          }
1229          else {
1230             error = GL_TRUE;
1231          }
1232          break;
1233       case GL_TEXTURE_COMPARE_FUNC_ARB:
1234          if (ctx->Extensions.ARB_shadow) {
1235             *params = (GLint) obj->CompareFunc;
1236          }
1237          else {
1238             error = GL_TRUE;
1239          }
1240          break;
1241       case GL_DEPTH_TEXTURE_MODE_ARB:
1242          if (ctx->Extensions.ARB_depth_texture) {
1243             *params = (GLint) obj->DepthMode;
1244          }
1245          else {
1246             error = GL_TRUE;
1247          }
1248          break;
1249       case GL_TEXTURE_LOD_BIAS:
1250          if (ctx->Extensions.EXT_texture_lod_bias) {
1251             *params = (GLint) obj->LodBias;
1252          }
1253          else {
1254             error = GL_TRUE;
1255          }
1256          break;
1257 #ifdef FEATURE_OES_draw_texture
1258       case GL_TEXTURE_CROP_RECT_OES:
1259          params[0] = obj->CropRect[0];
1260          params[1] = obj->CropRect[1];
1261          params[2] = obj->CropRect[2];
1262          params[3] = obj->CropRect[3];
1263          break;
1264 #endif
1265       case GL_TEXTURE_SWIZZLE_R_EXT:
1266       case GL_TEXTURE_SWIZZLE_G_EXT:
1267       case GL_TEXTURE_SWIZZLE_B_EXT:
1268       case GL_TEXTURE_SWIZZLE_A_EXT:
1269          if (ctx->Extensions.EXT_texture_swizzle) {
1270             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1271             *params = obj->Swizzle[comp];
1272          }
1273          else {
1274             error = GL_TRUE;
1275          }
1276          break;
1277
1278       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1279          if (ctx->Extensions.EXT_texture_swizzle) {
1280             COPY_4V(params, obj->Swizzle);
1281          }
1282          else {
1283             error = GL_TRUE;
1284          }
1285          break;
1286
1287       default:
1288          ; /* silence warnings */
1289    }
1290
1291    if (error)
1292       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)",
1293                   pname);
1294
1295    _mesa_unlock_texture(ctx, obj);
1296 }