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