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  * Note that this is different from _mesa_select_tex_object() in that proxy
  83  * targets are not accepted.
  84  */
  85 static struct gl_texture_object *
  86 get_texobj(GLcontext *ctx, GLenum target)
  87 {
  88    struct gl_texture_unit *texUnit;
  89
  90    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
  91       _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(current unit)");
  92       return NULL;
  93    }
  94
  95    texUnit = _mesa_get_current_tex_unit(ctx);
  96
  97    switch (target) {
  98    case GL_TEXTURE_1D:
  99       return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 100    case GL_TEXTURE_2D:
 101       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 102    case GL_TEXTURE_3D:
 103       return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 104    case GL_TEXTURE_CUBE_MAP:
 105       if (ctx->Extensions.ARB_texture_cube_map) {
 106          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 107       }
 108       break;
 109    case GL_TEXTURE_RECTANGLE_NV:
 110       if (ctx->Extensions.NV_texture_rectangle) {
 111          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 112       }
 113       break;
 114    case GL_TEXTURE_1D_ARRAY_EXT:
 115       if (ctx->Extensions.MESA_texture_array) {
 116          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 117       }
 118       break;
 119    case GL_TEXTURE_2D_ARRAY_EXT:
 120       if (ctx->Extensions.MESA_texture_array) {
 121          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 122       }
 123       break;
 124    default:
 125       ;
 126    }
 127
 128    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(target)");
 129    return NULL;
 130 }
 131
 132
 133 /**
 134  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 135  * \return -1 if error.
 136  */
 137 static GLint
 138 comp_to_swizzle(GLenum comp)
 139 {
 140    switch (comp) {
 141    case GL_RED:
 142       return SWIZZLE_X;
 143    case GL_GREEN:
 144       return SWIZZLE_Y;
 145    case GL_BLUE:
 146       return SWIZZLE_Z;
 147    case GL_ALPHA:
 148       return SWIZZLE_W;
 149    case GL_ZERO:
 150       return SWIZZLE_ZERO;
 151    case GL_ONE:
 152       return SWIZZLE_ONE;
 153    default:
 154       return -1;
 155    }
 156 }
 157
 158
 159 static void
 160 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 161 {
 162    ASSERT(comp < 4);
 163    ASSERT(swz <= SWIZZLE_NIL);
 164    {
 165       GLuint mask = 0x7 << (3 * comp);
 166       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 167       *swizzle = s;
 168    }
 169 }
 170
 171
 172 /**
 173  * This is called just prior to changing any texture object state.
 174  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 175  * state flag and then mark the texture object as 'incomplete' so that any
 176  * per-texture derived state gets recomputed.
 177  */
 178 static INLINE void
 179 flush(GLcontext *ctx, struct gl_texture_object *texObj)
 180 {
 181    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 182    texObj->_Complete = GL_FALSE;
 183 }
 184
 185
 186 /**
 187  * Set an integer-valued texture parameter
 188  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 189  */
 190 static GLboolean
 191 set_tex_parameteri(GLcontext *ctx,
 192                    struct gl_texture_object *texObj,
 193                    GLenum pname, const GLint *params)
 194 {
 195    switch (pname) {
 196    case GL_TEXTURE_MIN_FILTER:
 197       if (texObj->MinFilter == params[0])
 198          return GL_FALSE;
 199       switch (params[0]) {
 200       case GL_NEAREST:
 201       case GL_LINEAR:
 202          flush(ctx, texObj);
 203          texObj->MinFilter = params[0];
 204          return GL_TRUE;
 205       case GL_NEAREST_MIPMAP_NEAREST:
 206       case GL_LINEAR_MIPMAP_NEAREST:
 207       case GL_NEAREST_MIPMAP_LINEAR:
 208       case GL_LINEAR_MIPMAP_LINEAR:
 209          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV) {
 210             flush(ctx, texObj);
 211             texObj->MinFilter = params[0];
 212             return GL_TRUE;
 213          }
 214          /* fall-through */
 215       default:
 216          _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)",
 217                       params[0] );
 218       }
 219       return GL_FALSE;
 220
 221    case GL_TEXTURE_MAG_FILTER:
 222       if (texObj->MagFilter == params[0])
 223          return GL_FALSE;
 224       switch (params[0]) {
 225       case GL_NEAREST:
 226       case GL_LINEAR:
 227          flush(ctx, texObj);
 228          texObj->MagFilter = params[0];
 229          return GL_TRUE;
 230       default:
 231          _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)",
 232                       params[0]);
 233       }
 234       return GL_FALSE;
 235
 236    case GL_TEXTURE_WRAP_S:
 237       if (texObj->WrapS == params[0])
 238          return GL_FALSE;
 239       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 240          flush(ctx, texObj);
 241          texObj->WrapS = params[0];
 242          return GL_TRUE;
 243       }
 244       return GL_FALSE;
 245
 246    case GL_TEXTURE_WRAP_T:
 247       if (texObj->WrapT == params[0])
 248          return GL_FALSE;
 249       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 250          flush(ctx, texObj);
 251          texObj->WrapT = params[0];
 252          return GL_TRUE;
 253       }
 254       return GL_FALSE;
 255
 256    case GL_TEXTURE_WRAP_R:
 257       if (texObj->WrapR == params[0])
 258          return GL_FALSE;
 259       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 260          flush(ctx, texObj);
 261          texObj->WrapR = params[0];
 262          return GL_TRUE;
 263       }
 264       return GL_FALSE;
 265
 266    case GL_TEXTURE_BASE_LEVEL:
 267       if (texObj->BaseLevel == params[0])
 268          return GL_FALSE;
 269       if (params[0] < 0 ||
 270           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 271          _mesa_error(ctx, GL_INVALID_VALUE,
 272                      "glTexParameter(param=%d)", params[0]);
 273          return GL_FALSE;
 274       }
 275       flush(ctx, texObj);
 276       texObj->BaseLevel = params[0];
 277       return GL_TRUE;
 278
 279    case GL_TEXTURE_MAX_LEVEL:
 280       if (texObj->MaxLevel == params[0])
 281          return GL_FALSE;
 282       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 283          _mesa_error(ctx, GL_INVALID_OPERATION,
 284                      "glTexParameter(param=%d)", params[0]);
 285          return GL_FALSE;
 286       }
 287       flush(ctx, texObj);
 288       texObj->MaxLevel = params[0];
 289       return GL_TRUE;
 290
 291    case GL_GENERATE_MIPMAP_SGIS:
 292       if (ctx->Extensions.SGIS_generate_mipmap) {
 293          if (texObj->GenerateMipmap != params[0]) {
 294             flush(ctx, texObj);
 295             texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 296             return GL_TRUE;
 297          }
 298          return GL_FALSE;
 299       }
 300       else {
 301          _mesa_error(ctx, GL_INVALID_ENUM,
 302                      "glTexParameter(pname=GL_GENERATE_MIPMAP_SGIS)");
 303       }
 304       return GL_FALSE;
 305
 306    case GL_TEXTURE_COMPARE_MODE_ARB:
 307       if (ctx->Extensions.ARB_shadow &&
 308           (params[0] == GL_NONE ||
 309            params[0] == GL_COMPARE_R_TO_TEXTURE_ARB)) {
 310          if (texObj->CompareMode != params[0]) {
 311             flush(ctx, texObj);
 312             texObj->CompareMode = params[0];
 313             return GL_TRUE;
 314          }
 315          return GL_FALSE;
 316       }
 317       else {
 318          _mesa_error(ctx, GL_INVALID_ENUM,
 319                      "glTexParameter(GL_TEXTURE_COMPARE_MODE_ARB)");
 320       }
 321       return GL_FALSE;
 322
 323    case GL_TEXTURE_COMPARE_FUNC_ARB:
 324       if (ctx->Extensions.ARB_shadow) {
 325          if (texObj->CompareFunc == params[0])
 326             return GL_FALSE;
 327          switch (params[0]) {
 328          case GL_LEQUAL:
 329          case GL_GEQUAL:
 330             flush(ctx, texObj);
 331             texObj->CompareFunc = params[0];
 332             return GL_TRUE;
 333          case GL_EQUAL:
 334          case GL_NOTEQUAL:
 335          case GL_LESS:
 336          case GL_GREATER:
 337          case GL_ALWAYS:
 338          case GL_NEVER:
 339             if (ctx->Extensions.EXT_shadow_funcs) {
 340                flush(ctx, texObj);
 341                texObj->CompareFunc = params[0];
 342                return GL_TRUE;
 343             }
 344             /* fall-through */
 345          default:
 346             _mesa_error(ctx, GL_INVALID_ENUM,
 347                         "glTexParameter(GL_TEXTURE_COMPARE_FUNC_ARB)");
 348          }
 349       }
 350       else {
 351          _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 352       }
 353       return GL_FALSE;
 354
 355    case GL_DEPTH_TEXTURE_MODE_ARB:
 356       if (ctx->Extensions.ARB_depth_texture &&
 357           (params[0] == GL_LUMINANCE ||
 358            params[0] == GL_INTENSITY ||
 359            params[0] == GL_ALPHA)) {
 360          if (texObj->DepthMode != params[0]) {
 361             flush(ctx, texObj);
 362             texObj->DepthMode = params[0];
 363             return GL_TRUE;
 364          }
 365       }
 366       else {
 367          _mesa_error(ctx, GL_INVALID_ENUM,
 368                      "glTexParameter(GL_DEPTH_TEXTURE_MODE_ARB)");
 369       }
 370       return GL_FALSE;
 371
 372 #ifdef FEATURE_OES_draw_texture
 373    case GL_TEXTURE_CROP_RECT_OES:
 374       texObj->CropRect[0] = params[0];
 375       texObj->CropRect[1] = params[1];
 376       texObj->CropRect[2] = params[2];
 377       texObj->CropRect[3] = params[3];
 378       return GL_TRUE;
 379 #endif
 380
 381    case GL_TEXTURE_SWIZZLE_R_EXT:
 382    case GL_TEXTURE_SWIZZLE_G_EXT:
 383    case GL_TEXTURE_SWIZZLE_B_EXT:
 384    case GL_TEXTURE_SWIZZLE_A_EXT:
 385       if (ctx->Extensions.EXT_texture_swizzle) {
 386          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 387          const GLint swz = comp_to_swizzle(params[0]);
 388          if (swz < 0) {
 389             _mesa_error(ctx, GL_INVALID_OPERATION,
 390                         "glTexParameter(swizzle 0x%x)", params[0]);
 391             return GL_FALSE;
 392          }
 393          ASSERT(comp < 4);
 394          if (swz >= 0) {
 395             flush(ctx, texObj);
 396             texObj->Swizzle[comp] = params[0];
 397             set_swizzle_component(&texObj->_Swizzle, comp, swz);
 398             return GL_TRUE;
 399          }
 400       }
 401       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 402       return GL_FALSE;
 403
 404    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 405       if (ctx->Extensions.EXT_texture_swizzle) {
 406          GLuint comp;
 407          flush(ctx, texObj);
 408          for (comp = 0; comp < 4; comp++) {
 409             const GLint swz = comp_to_swizzle(params[comp]);
 410             if (swz >= 0) {
 411                texObj->Swizzle[comp] = params[comp];
 412                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 413             }
 414             else {
 415                _mesa_error(ctx, GL_INVALID_OPERATION,
 416                            "glTexParameter(swizzle 0x%x)", params[comp]);
 417                return GL_FALSE;
 418             }
 419          }
 420          return GL_TRUE;
 421       }
 422       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 423       return GL_FALSE;
 424
 425    default:
 426       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 427    }
 428    return GL_FALSE;
 429 }
 430
 431
 432 /**
 433  * Set a float-valued texture parameter
 434  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 435  */
 436 static GLboolean
 437 set_tex_parameterf(GLcontext *ctx,
 438                    struct gl_texture_object *texObj,
 439                    GLenum pname, const GLfloat *params)
 440 {
 441    switch (pname) {
 442    case GL_TEXTURE_MIN_LOD:
 443       if (texObj->MinLod == params[0])
 444          return GL_FALSE;
 445       flush(ctx, texObj);
 446       texObj->MinLod = params[0];
 447       return GL_TRUE;
 448
 449    case GL_TEXTURE_MAX_LOD:
 450       if (texObj->MaxLod == params[0])
 451          return GL_FALSE;
 452       flush(ctx, texObj);
 453       texObj->MaxLod = params[0];
 454       return GL_TRUE;
 455
 456    case GL_TEXTURE_PRIORITY:
 457       flush(ctx, texObj);
 458       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 459       return GL_TRUE;
 460
 461    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 462       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 463          if (texObj->MaxAnisotropy == params[0])
 464             return GL_FALSE;
 465          if (params[0] < 1.0) {
 466             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 467             return GL_FALSE;
 468          }
 469          flush(ctx, texObj);
 470          /* clamp to max, that's what NVIDIA does */
 471          texObj->MaxAnisotropy = MIN2(params[0],
 472                                       ctx->Const.MaxTextureMaxAnisotropy);
 473          return GL_TRUE;
 474       }
 475       else {
 476          static GLuint count = 0;
 477          if (count++ < 10)
 478             _mesa_error(ctx, GL_INVALID_ENUM,
 479                         "glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)");
 480       }
 481       return GL_FALSE;
 482
 483    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 484       if (ctx->Extensions.ARB_shadow_ambient) {
 485          if (texObj->CompareFailValue != params[0]) {
 486             flush(ctx, texObj);
 487             texObj->CompareFailValue = CLAMP(params[0], 0.0F, 1.0F);
 488             return GL_TRUE;
 489          }
 490       }
 491       else {
 492          _mesa_error(ctx, GL_INVALID_ENUM,
 493                     "glTexParameter(pname=GL_TEXTURE_COMPARE_FAIL_VALUE_ARB)");
 494       }
 495       return GL_FALSE;
 496
 497    case GL_TEXTURE_LOD_BIAS:
 498       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias */
 499       if (ctx->Extensions.EXT_texture_lod_bias) {
 500          if (texObj->LodBias != params[0]) {
 501             flush(ctx, texObj);
 502             texObj->LodBias = params[0];
 503             return GL_TRUE;
 504          }
 505          return GL_FALSE;
 506       }
 507       break;
 508
 509    case GL_TEXTURE_BORDER_COLOR:
 510       flush(ctx, texObj);
 511       texObj->BorderColor[RCOMP] = params[0];
 512       texObj->BorderColor[GCOMP] = params[1];
 513       texObj->BorderColor[BCOMP] = params[2];
 514       texObj->BorderColor[ACOMP] = params[3];
 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);
 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       /* this will generate an error if pname is illegal */
 558       need_update = set_tex_parameterf(ctx, texObj, pname, &param);
 559    }
 560
 561    if (ctx->Driver.TexParameter && need_update) {
 562       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 563    }
 564 }
 565
 566
 567 void GLAPIENTRY
 568 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 569 {
 570    GLboolean need_update;
 571    struct gl_texture_object *texObj;
 572    GET_CURRENT_CONTEXT(ctx);
 573    ASSERT_OUTSIDE_BEGIN_END(ctx);
 574
 575    texObj = get_texobj(ctx, target);
 576    if (!texObj)
 577       return;
 578
 579    switch (pname) {
 580    case GL_TEXTURE_MIN_FILTER:
 581    case GL_TEXTURE_MAG_FILTER:
 582    case GL_TEXTURE_WRAP_S:
 583    case GL_TEXTURE_WRAP_T:
 584    case GL_TEXTURE_WRAP_R:
 585    case GL_TEXTURE_BASE_LEVEL:
 586    case GL_TEXTURE_MAX_LEVEL:
 587    case GL_GENERATE_MIPMAP_SGIS:
 588    case GL_TEXTURE_COMPARE_MODE_ARB:
 589    case GL_TEXTURE_COMPARE_FUNC_ARB:
 590    case GL_DEPTH_TEXTURE_MODE_ARB:
 591       {
 592          /* convert float param to int */
 593          GLint p = (GLint) params[0];
 594          need_update = set_tex_parameteri(ctx, texObj, pname, &p);
 595       }
 596       break;
 597
 598 #ifdef FEATURE_OES_draw_texture
 599    case GL_TEXTURE_CROP_RECT_OES:
 600       {
 601          /* convert float params to int */
 602          GLint iparams[4];
 603          iparams[0] = (GLint) params[0];
 604          iparams[1] = (GLint) params[1];
 605          iparams[2] = (GLint) params[2];
 606          iparams[3] = (GLint) params[3];
 607          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 608       }
 609       break;
 610 #endif
 611
 612    default:
 613       /* this will generate an error if pname is illegal */
 614       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 615    }
 616
 617    if (ctx->Driver.TexParameter && need_update) {
 618       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 619    }
 620 }
 621
 622
 623 void GLAPIENTRY
 624 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 625 {
 626    GLboolean need_update;
 627    struct gl_texture_object *texObj;
 628    GET_CURRENT_CONTEXT(ctx);
 629    ASSERT_OUTSIDE_BEGIN_END(ctx);
 630
 631    texObj = get_texobj(ctx, target);
 632    if (!texObj)
 633       return;
 634
 635    switch (pname) {
 636    case GL_TEXTURE_MIN_LOD:
 637    case GL_TEXTURE_MAX_LOD:
 638    case GL_TEXTURE_PRIORITY:
 639    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 640    case GL_TEXTURE_LOD_BIAS:
 641    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 642       {
 643          GLfloat fparam = (GLfloat) param;
 644          /* convert int param to float */
 645          need_update = set_tex_parameterf(ctx, texObj, pname, &fparam);
 646       }
 647       break;
 648    default:
 649       /* this will generate an error if pname is illegal */
 650       need_update = set_tex_parameteri(ctx, texObj, pname, &param);
 651    }
 652
 653    if (ctx->Driver.TexParameter && need_update) {
 654       GLfloat fparam = (GLfloat) param;
 655       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 656    }
 657 }
 658
 659
 660 void GLAPIENTRY
 661 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 662 {
 663    GLboolean need_update;
 664    struct gl_texture_object *texObj;
 665    GET_CURRENT_CONTEXT(ctx);
 666    ASSERT_OUTSIDE_BEGIN_END(ctx);
 667
 668    texObj = get_texobj(ctx, target);
 669    if (!texObj)
 670       return;
 671
 672    switch (pname) {
 673    case GL_TEXTURE_BORDER_COLOR:
 674       {
 675          /* convert int params to float */
 676          GLfloat fparams[4];
 677          fparams[0] = INT_TO_FLOAT(params[0]);
 678          fparams[1] = INT_TO_FLOAT(params[1]);
 679          fparams[2] = INT_TO_FLOAT(params[2]);
 680          fparams[3] = INT_TO_FLOAT(params[3]);
 681          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 682       }
 683       break;
 684    case GL_TEXTURE_MIN_LOD:
 685    case GL_TEXTURE_MAX_LOD:
 686    case GL_TEXTURE_PRIORITY:
 687    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 688    case GL_TEXTURE_LOD_BIAS:
 689    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 690       {
 691          /* convert int param to float */
 692          GLfloat fparam = (GLfloat) params[0];
 693          need_update = set_tex_parameterf(ctx, texObj, pname, &fparam);
 694       }
 695       break;
 696    default:
 697       /* this will generate an error if pname is illegal */
 698       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 699    }
 700
 701    if (ctx->Driver.TexParameter && need_update) {
 702       GLfloat fparams[4];
 703       fparams[0] = INT_TO_FLOAT(params[0]);
 704       if (pname == GL_TEXTURE_BORDER_COLOR ||
 705           pname == GL_TEXTURE_CROP_RECT_OES) {
 706          fparams[1] = INT_TO_FLOAT(params[1]);
 707          fparams[2] = INT_TO_FLOAT(params[2]);
 708          fparams[3] = INT_TO_FLOAT(params[3]);
 709       }
 710       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 711    }
 712 }
 713
 714
 715 void GLAPIENTRY
 716 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
 717                               GLenum pname, GLfloat *params )
 718 {
 719    GLint iparam;
 720    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
 721    *params = (GLfloat) iparam;
 722 }
 723
 724
 725 void GLAPIENTRY
 726 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
 727                               GLenum pname, GLint *params )
 728 {
 729    const struct gl_texture_unit *texUnit;
 730    struct gl_texture_object *texObj;
 731    const struct gl_texture_image *img = NULL;
 732    GLboolean isProxy;
 733    GLint maxLevels;
 734    gl_format texFormat;
 735    GET_CURRENT_CONTEXT(ctx);
 736    ASSERT_OUTSIDE_BEGIN_END(ctx);
 737
 738    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
 739       _mesa_error(ctx, GL_INVALID_OPERATION,
 740                   "glGetTexLevelParameteriv(current unit)");
 741       return;
 742    }
 743
 744    texUnit = _mesa_get_current_tex_unit(ctx);
 745
 746    /* this will catch bad target values */
 747    maxLevels = _mesa_max_texture_levels(ctx, target);
 748    if (maxLevels == 0) {
 749       _mesa_error(ctx, GL_INVALID_ENUM,
 750                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
 751       return;
 752    }
 753
 754    if (level < 0 || level >= maxLevels) {
 755       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
 756       return;
 757    }
 758
 759    texObj = _mesa_select_tex_object(ctx, texUnit, target);
 760    _mesa_lock_texture(ctx, texObj);
 761
 762    img = _mesa_select_tex_image(ctx, texObj, target, level);
 763    if (!img || !img->TexFormat) {
 764       /* undefined texture image */
 765       if (pname == GL_TEXTURE_COMPONENTS)
 766          *params = 1;
 767       else
 768          *params = 0;
 769       goto out;
 770    }
 771
 772    texFormat = img->TexFormat;
 773
 774    isProxy = _mesa_is_proxy_texture(target);
 775
 776    switch (pname) {
 777       case GL_TEXTURE_WIDTH:
 778          *params = img->Width;
 779          break;
 780       case GL_TEXTURE_HEIGHT:
 781          *params = img->Height;
 782          break;
 783       case GL_TEXTURE_DEPTH:
 784          *params = img->Depth;
 785          break;
 786       case GL_TEXTURE_INTERNAL_FORMAT:
 787          if (_mesa_is_format_compressed(img->TexFormat)) {
 788             /* need to return the actual compressed format */
 789             *params = _mesa_compressed_format_to_glenum(ctx, img->TexFormat);
 790          }
 791          else {
 792             /* return the user's requested internal format */
 793             *params = img->InternalFormat;
 794          }
 795          break;
 796       case GL_TEXTURE_BORDER:
 797          *params = img->Border;
 798          break;
 799       case GL_TEXTURE_RED_SIZE:
 800       case GL_TEXTURE_GREEN_SIZE:
 801       case GL_TEXTURE_BLUE_SIZE:
 802          if (img->_BaseFormat == GL_RGB || img->_BaseFormat == GL_RGBA)
 803             *params = _mesa_get_format_bits(texFormat, pname);
 804          else
 805             *params = 0;
 806          break;
 807       case GL_TEXTURE_ALPHA_SIZE:
 808          if (img->_BaseFormat == GL_ALPHA ||
 809              img->_BaseFormat == GL_LUMINANCE_ALPHA ||
 810              img->_BaseFormat == GL_RGBA)
 811             *params = _mesa_get_format_bits(texFormat, pname);
 812          else
 813             *params = 0;
 814          break;
 815       case GL_TEXTURE_INTENSITY_SIZE:
 816          if (img->_BaseFormat != GL_INTENSITY)
 817             *params = 0;
 818          else {
 819             *params = _mesa_get_format_bits(texFormat, pname);
 820             if (*params == 0) {
 821                /* intensity probably stored as rgb texture */
 822                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 823                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 824             }
 825          }
 826          break;
 827       case GL_TEXTURE_LUMINANCE_SIZE:
 828          if (img->_BaseFormat != GL_LUMINANCE &&
 829              img->_BaseFormat != GL_LUMINANCE_ALPHA)
 830             *params = 0;
 831          else {
 832             *params = _mesa_get_format_bits(texFormat, pname);
 833             if (*params == 0) {
 834                /* luminance probably stored as rgb texture */
 835                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 836                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 837             }
 838          }
 839          break;
 840       case GL_TEXTURE_INDEX_SIZE_EXT:
 841          if (img->_BaseFormat == GL_COLOR_INDEX)
 842             *params = _mesa_get_format_bits(texFormat, pname);
 843          else
 844             *params = 0;
 845          break;
 846       case GL_TEXTURE_DEPTH_SIZE_ARB:
 847          if (ctx->Extensions.ARB_depth_texture)
 848             *params = _mesa_get_format_bits(texFormat, pname);
 849          else
 850             _mesa_error(ctx, GL_INVALID_ENUM,
 851                         "glGetTexLevelParameter[if]v(pname)");
 852          break;
 853       case GL_TEXTURE_STENCIL_SIZE_EXT:
 854          if (ctx->Extensions.EXT_packed_depth_stencil ||
 855              ctx->Extensions.ARB_framebuffer_object) {
 856             *params = _mesa_get_format_bits(texFormat, pname);
 857          }
 858          else {
 859             _mesa_error(ctx, GL_INVALID_ENUM,
 860                         "glGetTexLevelParameter[if]v(pname)");
 861          }
 862          break;
 863
 864       /* GL_ARB_texture_compression */
 865       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
 866          if (_mesa_is_format_compressed(img->TexFormat) && !isProxy) {
 867             *params = _mesa_format_image_size(texFormat, img->Width,
 868                                               img->Height, img->Depth);
 869          }
 870          else {
 871             _mesa_error(ctx, GL_INVALID_OPERATION,
 872                         "glGetTexLevelParameter[if]v(pname)");
 873          }
 874          break;
 875       case GL_TEXTURE_COMPRESSED:
 876          *params = (GLint) _mesa_is_format_compressed(img->TexFormat);
 877          break;
 878
 879       /* GL_ARB_texture_float */
 880       case GL_TEXTURE_RED_TYPE_ARB:
 881          if (ctx->Extensions.ARB_texture_float) {
 882             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE) ?
 883                _mesa_get_format_datatype(texFormat) : GL_NONE;
 884          }
 885          else {
 886             _mesa_error(ctx, GL_INVALID_ENUM,
 887                         "glGetTexLevelParameter[if]v(pname)");
 888          }
 889          break;
 890       case GL_TEXTURE_GREEN_TYPE_ARB:
 891          if (ctx->Extensions.ARB_texture_float) {
 892             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE) ?
 893                _mesa_get_format_datatype(texFormat) : GL_NONE;
 894          }
 895          else {
 896             _mesa_error(ctx, GL_INVALID_ENUM,
 897                         "glGetTexLevelParameter[if]v(pname)");
 898          }
 899          break;
 900       case GL_TEXTURE_BLUE_TYPE_ARB:
 901          if (ctx->Extensions.ARB_texture_float) {
 902             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_BLUE_SIZE) ?
 903                _mesa_get_format_datatype(texFormat) : GL_NONE;
 904          }
 905          else {
 906             _mesa_error(ctx, GL_INVALID_ENUM,
 907                         "glGetTexLevelParameter[if]v(pname)");
 908          }
 909          break;
 910       case GL_TEXTURE_ALPHA_TYPE_ARB:
 911          if (ctx->Extensions.ARB_texture_float) {
 912             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_ALPHA_SIZE) ?
 913                _mesa_get_format_datatype(texFormat) : GL_NONE;
 914          }
 915          else {
 916             _mesa_error(ctx, GL_INVALID_ENUM,
 917                         "glGetTexLevelParameter[if]v(pname)");
 918          }
 919          break;
 920       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
 921          if (ctx->Extensions.ARB_texture_float) {
 922             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_LUMINANCE_SIZE) ?
 923                _mesa_get_format_datatype(texFormat) : GL_NONE;
 924          }
 925          else {
 926             _mesa_error(ctx, GL_INVALID_ENUM,
 927                         "glGetTexLevelParameter[if]v(pname)");
 928          }
 929          break;
 930       case GL_TEXTURE_INTENSITY_TYPE_ARB:
 931          if (ctx->Extensions.ARB_texture_float) {
 932             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_INTENSITY_SIZE) ?
 933                _mesa_get_format_datatype(texFormat) : GL_NONE;
 934          }
 935          else {
 936             _mesa_error(ctx, GL_INVALID_ENUM,
 937                         "glGetTexLevelParameter[if]v(pname)");
 938          }
 939          break;
 940       case GL_TEXTURE_DEPTH_TYPE_ARB:
 941          if (ctx->Extensions.ARB_texture_float) {
 942             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_DEPTH_SIZE) ?
 943                _mesa_get_format_datatype(texFormat) : GL_NONE;
 944          }
 945          else {
 946             _mesa_error(ctx, GL_INVALID_ENUM,
 947                         "glGetTexLevelParameter[if]v(pname)");
 948          }
 949          break;
 950
 951       default:
 952          _mesa_error(ctx, GL_INVALID_ENUM,
 953                      "glGetTexLevelParameter[if]v(pname)");
 954    }
 955
 956  out:
 957    _mesa_unlock_texture(ctx, texObj);
 958 }
 959
 960
 961
 962 void GLAPIENTRY
 963 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
 964 {
 965    struct gl_texture_unit *texUnit;
 966    struct gl_texture_object *obj;
 967    GLboolean error = GL_FALSE;
 968    GET_CURRENT_CONTEXT(ctx);
 969    ASSERT_OUTSIDE_BEGIN_END(ctx);
 970
 971    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
 972       _mesa_error(ctx, GL_INVALID_OPERATION,
 973                   "glGetTexParameterfv(current unit)");
 974       return;
 975    }
 976
 977    texUnit = _mesa_get_current_tex_unit(ctx);
 978
 979    obj = _mesa_select_tex_object(ctx, texUnit, target);
 980    if (!obj) {
 981       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(target)");
 982       return;
 983    }
 984
 985    _mesa_lock_texture(ctx, obj);
 986    switch (pname) {
 987       case GL_TEXTURE_MAG_FILTER:
 988          *params = ENUM_TO_FLOAT(obj->MagFilter);
 989          break;
 990       case GL_TEXTURE_MIN_FILTER:
 991          *params = ENUM_TO_FLOAT(obj->MinFilter);
 992          break;
 993       case GL_TEXTURE_WRAP_S:
 994          *params = ENUM_TO_FLOAT(obj->WrapS);
 995          break;
 996       case GL_TEXTURE_WRAP_T:
 997          *params = ENUM_TO_FLOAT(obj->WrapT);
 998          break;
 999       case GL_TEXTURE_WRAP_R:
1000          *params = ENUM_TO_FLOAT(obj->WrapR);
1001          break;
1002       case GL_TEXTURE_BORDER_COLOR:
1003          params[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F);
1004          params[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F);
1005          params[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F);
1006          params[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F);
1007          break;
1008       case GL_TEXTURE_RESIDENT:
1009          {
1010             GLboolean resident;
1011             if (ctx->Driver.IsTextureResident)
1012                resident = ctx->Driver.IsTextureResident(ctx, obj);
1013             else
1014                resident = GL_TRUE;
1015             *params = ENUM_TO_FLOAT(resident);
1016          }
1017          break;
1018       case GL_TEXTURE_PRIORITY:
1019          *params = obj->Priority;
1020          break;
1021       case GL_TEXTURE_MIN_LOD:
1022          *params = obj->MinLod;
1023          break;
1024       case GL_TEXTURE_MAX_LOD:
1025          *params = obj->MaxLod;
1026          break;
1027       case GL_TEXTURE_BASE_LEVEL:
1028          *params = (GLfloat) obj->BaseLevel;
1029          break;
1030       case GL_TEXTURE_MAX_LEVEL:
1031          *params = (GLfloat) obj->MaxLevel;
1032          break;
1033       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1034          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1035             *params = obj->MaxAnisotropy;
1036          }
1037          else
1038             error = GL_TRUE;
1039          break;
1040       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1041          if (ctx->Extensions.ARB_shadow_ambient) {
1042             *params = obj->CompareFailValue;
1043          }
1044          else
1045             error = GL_TRUE;
1046          break;
1047       case GL_GENERATE_MIPMAP_SGIS:
1048          if (ctx->Extensions.SGIS_generate_mipmap) {
1049             *params = (GLfloat) obj->GenerateMipmap;
1050          }
1051          else
1052             error = GL_TRUE;
1053          break;
1054       case GL_TEXTURE_COMPARE_MODE_ARB:
1055          if (ctx->Extensions.ARB_shadow) {
1056             *params = (GLfloat) obj->CompareMode;
1057          }
1058          else
1059             error = GL_TRUE;
1060          break;
1061       case GL_TEXTURE_COMPARE_FUNC_ARB:
1062          if (ctx->Extensions.ARB_shadow) {
1063             *params = (GLfloat) obj->CompareFunc;
1064          }
1065          else
1066             error = GL_TRUE;
1067          break;
1068       case GL_DEPTH_TEXTURE_MODE_ARB:
1069          if (ctx->Extensions.ARB_depth_texture) {
1070             *params = (GLfloat) obj->DepthMode;
1071          }
1072          else
1073             error = GL_TRUE;
1074          break;
1075       case GL_TEXTURE_LOD_BIAS:
1076          if (ctx->Extensions.EXT_texture_lod_bias) {
1077             *params = obj->LodBias;
1078          }
1079          else
1080             error = GL_TRUE;
1081          break;
1082 #ifdef FEATURE_OES_draw_texture
1083       case GL_TEXTURE_CROP_RECT_OES:
1084          params[0] = obj->CropRect[0];
1085          params[1] = obj->CropRect[1];
1086          params[2] = obj->CropRect[2];
1087          params[3] = obj->CropRect[3];
1088          break;
1089 #endif
1090
1091       case GL_TEXTURE_SWIZZLE_R_EXT:
1092       case GL_TEXTURE_SWIZZLE_G_EXT:
1093       case GL_TEXTURE_SWIZZLE_B_EXT:
1094       case GL_TEXTURE_SWIZZLE_A_EXT:
1095          if (ctx->Extensions.EXT_texture_swizzle) {
1096             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1097             *params = (GLfloat) obj->Swizzle[comp];
1098          }
1099          else {
1100             error = GL_TRUE;
1101          }
1102          break;
1103
1104       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1105          if (ctx->Extensions.EXT_texture_swizzle) {
1106             GLuint comp;
1107             for (comp = 0; comp < 4; comp++) {
1108                params[comp] = (GLfloat) obj->Swizzle[comp];
1109             }
1110          }
1111          else {
1112             error = GL_TRUE;
1113          }
1114          break;
1115
1116       default:
1117          error = GL_TRUE;
1118          break;
1119    }
1120
1121    if (error)
1122       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)",
1123                   pname);
1124
1125    _mesa_unlock_texture(ctx, obj);
1126 }
1127
1128
1129 void GLAPIENTRY
1130 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1131 {
1132    struct gl_texture_unit *texUnit;
1133    struct gl_texture_object *obj;
1134    GLboolean error = GL_FALSE;
1135    GET_CURRENT_CONTEXT(ctx);
1136    ASSERT_OUTSIDE_BEGIN_END(ctx);
1137
1138    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
1139       _mesa_error(ctx, GL_INVALID_OPERATION,
1140                   "glGetTexParameteriv(current unit)");
1141       return;
1142    }
1143
1144    texUnit = _mesa_get_current_tex_unit(ctx);
1145
1146    obj = _mesa_select_tex_object(ctx, texUnit, target);
1147    if (!obj) {
1148       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(target)");
1149       return;
1150    }
1151
1152    switch (pname) {
1153       case GL_TEXTURE_MAG_FILTER:
1154          *params = (GLint) obj->MagFilter;
1155          break;;
1156       case GL_TEXTURE_MIN_FILTER:
1157          *params = (GLint) obj->MinFilter;
1158          break;;
1159       case GL_TEXTURE_WRAP_S:
1160          *params = (GLint) obj->WrapS;
1161          break;;
1162       case GL_TEXTURE_WRAP_T:
1163          *params = (GLint) obj->WrapT;
1164          break;;
1165       case GL_TEXTURE_WRAP_R:
1166          *params = (GLint) obj->WrapR;
1167          break;;
1168       case GL_TEXTURE_BORDER_COLOR:
1169          {
1170             GLfloat b[4];
1171             b[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F);
1172             b[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F);
1173             b[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F);
1174             b[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F);
1175             params[0] = FLOAT_TO_INT(b[0]);
1176             params[1] = FLOAT_TO_INT(b[1]);
1177             params[2] = FLOAT_TO_INT(b[2]);
1178             params[3] = FLOAT_TO_INT(b[3]);
1179          }
1180          break;;
1181       case GL_TEXTURE_RESIDENT:
1182          {
1183             GLboolean resident;
1184             if (ctx->Driver.IsTextureResident)
1185                resident = ctx->Driver.IsTextureResident(ctx, obj);
1186             else
1187                resident = GL_TRUE;
1188             *params = (GLint) resident;
1189          }
1190          break;;
1191       case GL_TEXTURE_PRIORITY:
1192          *params = FLOAT_TO_INT(obj->Priority);
1193          break;;
1194       case GL_TEXTURE_MIN_LOD:
1195          *params = (GLint) obj->MinLod;
1196          break;;
1197       case GL_TEXTURE_MAX_LOD:
1198          *params = (GLint) obj->MaxLod;
1199          break;;
1200       case GL_TEXTURE_BASE_LEVEL:
1201          *params = obj->BaseLevel;
1202          break;;
1203       case GL_TEXTURE_MAX_LEVEL:
1204          *params = obj->MaxLevel;
1205          break;;
1206       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1207          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1208             *params = (GLint) obj->MaxAnisotropy;
1209          }
1210          else {
1211             error = GL_TRUE;
1212          }
1213          break;
1214       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1215          if (ctx->Extensions.ARB_shadow_ambient) {
1216             *params = (GLint) FLOAT_TO_INT(obj->CompareFailValue);
1217          }
1218          else {
1219             error = GL_TRUE;
1220          }
1221          break;
1222       case GL_GENERATE_MIPMAP_SGIS:
1223          if (ctx->Extensions.SGIS_generate_mipmap) {
1224             *params = (GLint) obj->GenerateMipmap;
1225          }
1226          else {
1227             error = GL_TRUE;
1228          }
1229          break;
1230       case GL_TEXTURE_COMPARE_MODE_ARB:
1231          if (ctx->Extensions.ARB_shadow) {
1232             *params = (GLint) obj->CompareMode;
1233          }
1234          else {
1235             error = GL_TRUE;
1236          }
1237          break;
1238       case GL_TEXTURE_COMPARE_FUNC_ARB:
1239          if (ctx->Extensions.ARB_shadow) {
1240             *params = (GLint) obj->CompareFunc;
1241          }
1242          else {
1243             error = GL_TRUE;
1244          }
1245          break;
1246       case GL_DEPTH_TEXTURE_MODE_ARB:
1247          if (ctx->Extensions.ARB_depth_texture) {
1248             *params = (GLint) obj->DepthMode;
1249          }
1250          else {
1251             error = GL_TRUE;
1252          }
1253          break;
1254       case GL_TEXTURE_LOD_BIAS:
1255          if (ctx->Extensions.EXT_texture_lod_bias) {
1256             *params = (GLint) obj->LodBias;
1257          }
1258          else {
1259             error = GL_TRUE;
1260          }
1261          break;
1262 #ifdef FEATURE_OES_draw_texture
1263       case GL_TEXTURE_CROP_RECT_OES:
1264          params[0] = obj->CropRect[0];
1265          params[1] = obj->CropRect[1];
1266          params[2] = obj->CropRect[2];
1267          params[3] = obj->CropRect[3];
1268          break;
1269 #endif
1270       case GL_TEXTURE_SWIZZLE_R_EXT:
1271       case GL_TEXTURE_SWIZZLE_G_EXT:
1272       case GL_TEXTURE_SWIZZLE_B_EXT:
1273       case GL_TEXTURE_SWIZZLE_A_EXT:
1274          if (ctx->Extensions.EXT_texture_swizzle) {
1275             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1276             *params = obj->Swizzle[comp];
1277          }
1278          else {
1279             error = GL_TRUE;
1280          }
1281          break;
1282
1283       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1284          if (ctx->Extensions.EXT_texture_swizzle) {
1285             COPY_4V(params, obj->Swizzle);
1286          }
1287          else {
1288             error = GL_TRUE;
1289          }
1290          break;
1291
1292       default:
1293          ; /* silence warnings */
1294    }
1295
1296    if (error)
1297       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)",
1298                   pname);
1299
1300    _mesa_unlock_texture(ctx, obj);
1301 }