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 = (GLint) param;
 551          need_update = set_tex_parameteri(ctx, texObj, pname, &p);
 552       }
 553       break;
 554    default:
 555       /* this will generate an error if pname is illegal */
 556       need_update = set_tex_parameterf(ctx, texObj, pname, &param);
 557    }
 558
 559    if (ctx->Driver.TexParameter && need_update) {
 560       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 561    }
 562 }
 563
 564
 565 void GLAPIENTRY
 566 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 567 {
 568    GLboolean need_update;
 569    struct gl_texture_object *texObj;
 570    GET_CURRENT_CONTEXT(ctx);
 571    ASSERT_OUTSIDE_BEGIN_END(ctx);
 572
 573    texObj = get_texobj(ctx, target);
 574    if (!texObj)
 575       return;
 576
 577    switch (pname) {
 578    case GL_TEXTURE_MIN_FILTER:
 579    case GL_TEXTURE_MAG_FILTER:
 580    case GL_TEXTURE_WRAP_S:
 581    case GL_TEXTURE_WRAP_T:
 582    case GL_TEXTURE_WRAP_R:
 583    case GL_TEXTURE_BASE_LEVEL:
 584    case GL_TEXTURE_MAX_LEVEL:
 585    case GL_GENERATE_MIPMAP_SGIS:
 586    case GL_TEXTURE_COMPARE_MODE_ARB:
 587    case GL_TEXTURE_COMPARE_FUNC_ARB:
 588    case GL_DEPTH_TEXTURE_MODE_ARB:
 589       {
 590          /* convert float param to int */
 591          GLint p = (GLint) params[0];
 592          need_update = set_tex_parameteri(ctx, texObj, pname, &p);
 593       }
 594       break;
 595
 596 #ifdef FEATURE_OES_draw_texture
 597    case GL_TEXTURE_CROP_RECT_OES:
 598       {
 599          /* convert float params to int */
 600          GLint iparams[4];
 601          iparams[0] = (GLint) params[0];
 602          iparams[1] = (GLint) params[1];
 603          iparams[2] = (GLint) params[2];
 604          iparams[3] = (GLint) params[3];
 605          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 606       }
 607       break;
 608 #endif
 609
 610    default:
 611       /* this will generate an error if pname is illegal */
 612       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 613    }
 614
 615    if (ctx->Driver.TexParameter && need_update) {
 616       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 617    }
 618 }
 619
 620
 621 void GLAPIENTRY
 622 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 623 {
 624    GLboolean need_update;
 625    struct gl_texture_object *texObj;
 626    GET_CURRENT_CONTEXT(ctx);
 627    ASSERT_OUTSIDE_BEGIN_END(ctx);
 628
 629    texObj = get_texobj(ctx, target);
 630    if (!texObj)
 631       return;
 632
 633    switch (pname) {
 634    case GL_TEXTURE_MIN_LOD:
 635    case GL_TEXTURE_MAX_LOD:
 636    case GL_TEXTURE_PRIORITY:
 637    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 638    case GL_TEXTURE_LOD_BIAS:
 639    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 640       {
 641          GLfloat fparam = (GLfloat) param;
 642          /* convert int param to float */
 643          need_update = set_tex_parameterf(ctx, texObj, pname, &fparam);
 644       }
 645       break;
 646    default:
 647       /* this will generate an error if pname is illegal */
 648       need_update = set_tex_parameteri(ctx, texObj, pname, &param);
 649    }
 650
 651    if (ctx->Driver.TexParameter && need_update) {
 652       GLfloat fparam = (GLfloat) param;
 653       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 654    }
 655 }
 656
 657
 658 void GLAPIENTRY
 659 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 660 {
 661    GLboolean need_update;
 662    struct gl_texture_object *texObj;
 663    GET_CURRENT_CONTEXT(ctx);
 664    ASSERT_OUTSIDE_BEGIN_END(ctx);
 665
 666    texObj = get_texobj(ctx, target);
 667    if (!texObj)
 668       return;
 669
 670    switch (pname) {
 671    case GL_TEXTURE_BORDER_COLOR:
 672       {
 673          /* convert int params to float */
 674          GLfloat fparams[4];
 675          fparams[0] = INT_TO_FLOAT(params[0]);
 676          fparams[1] = INT_TO_FLOAT(params[1]);
 677          fparams[2] = INT_TO_FLOAT(params[2]);
 678          fparams[3] = INT_TO_FLOAT(params[3]);
 679          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 680       }
 681       break;
 682    case GL_TEXTURE_MIN_LOD:
 683    case GL_TEXTURE_MAX_LOD:
 684    case GL_TEXTURE_PRIORITY:
 685    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 686    case GL_TEXTURE_LOD_BIAS:
 687    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 688       {
 689          /* convert int param to float */
 690          GLfloat fparam = (GLfloat) params[0];
 691          need_update = set_tex_parameterf(ctx, texObj, pname, &fparam);
 692       }
 693       break;
 694    default:
 695       /* this will generate an error if pname is illegal */
 696       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 697    }
 698
 699    if (ctx->Driver.TexParameter && need_update) {
 700       GLfloat fparams[4];
 701       fparams[0] = INT_TO_FLOAT(params[0]);
 702       if (pname == GL_TEXTURE_BORDER_COLOR ||
 703           pname == GL_TEXTURE_CROP_RECT_OES) {
 704          fparams[1] = INT_TO_FLOAT(params[1]);
 705          fparams[2] = INT_TO_FLOAT(params[2]);
 706          fparams[3] = INT_TO_FLOAT(params[3]);
 707       }
 708       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 709    }
 710 }
 711
 712
 713 void GLAPIENTRY
 714 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
 715                               GLenum pname, GLfloat *params )
 716 {
 717    GLint iparam;
 718    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
 719    *params = (GLfloat) iparam;
 720 }
 721
 722
 723 void GLAPIENTRY
 724 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
 725                               GLenum pname, GLint *params )
 726 {
 727    const struct gl_texture_unit *texUnit;
 728    struct gl_texture_object *texObj;
 729    const struct gl_texture_image *img = NULL;
 730    GLboolean isProxy;
 731    GLint maxLevels;
 732    gl_format texFormat;
 733    GET_CURRENT_CONTEXT(ctx);
 734    ASSERT_OUTSIDE_BEGIN_END(ctx);
 735
 736    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
 737       _mesa_error(ctx, GL_INVALID_OPERATION,
 738                   "glGetTexLevelParameteriv(current unit)");
 739       return;
 740    }
 741
 742    texUnit = _mesa_get_current_tex_unit(ctx);
 743
 744    /* this will catch bad target values */
 745    maxLevels = _mesa_max_texture_levels(ctx, target);
 746    if (maxLevels == 0) {
 747       _mesa_error(ctx, GL_INVALID_ENUM,
 748                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
 749       return;
 750    }
 751
 752    if (level < 0 || level >= maxLevels) {
 753       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
 754       return;
 755    }
 756
 757    texObj = _mesa_select_tex_object(ctx, texUnit, target);
 758    _mesa_lock_texture(ctx, texObj);
 759
 760    img = _mesa_select_tex_image(ctx, texObj, target, level);
 761    if (!img || !img->TexFormat) {
 762       /* undefined texture image */
 763       if (pname == GL_TEXTURE_COMPONENTS)
 764          *params = 1;
 765       else
 766          *params = 0;
 767       goto out;
 768    }
 769
 770    texFormat = img->TexFormat;
 771
 772    isProxy = _mesa_is_proxy_texture(target);
 773
 774    switch (pname) {
 775       case GL_TEXTURE_WIDTH:
 776          *params = img->Width;
 777          break;
 778       case GL_TEXTURE_HEIGHT:
 779          *params = img->Height;
 780          break;
 781       case GL_TEXTURE_DEPTH:
 782          *params = img->Depth;
 783          break;
 784       case GL_TEXTURE_INTERNAL_FORMAT:
 785          if (_mesa_is_format_compressed(img->TexFormat)) {
 786             /* need to return the actual compressed format */
 787             *params = _mesa_compressed_format_to_glenum(ctx, img->TexFormat);
 788          }
 789          else {
 790             /* return the user's requested internal format */
 791             *params = img->InternalFormat;
 792          }
 793          break;
 794       case GL_TEXTURE_BORDER:
 795          *params = img->Border;
 796          break;
 797       case GL_TEXTURE_RED_SIZE:
 798       case GL_TEXTURE_GREEN_SIZE:
 799       case GL_TEXTURE_BLUE_SIZE:
 800          if (img->_BaseFormat == GL_RGB || img->_BaseFormat == GL_RGBA)
 801             *params = _mesa_get_format_bits(texFormat, pname);
 802          else
 803             *params = 0;
 804          break;
 805       case GL_TEXTURE_ALPHA_SIZE:
 806          if (img->_BaseFormat == GL_ALPHA ||
 807              img->_BaseFormat == GL_LUMINANCE_ALPHA ||
 808              img->_BaseFormat == GL_RGBA)
 809             *params = _mesa_get_format_bits(texFormat, pname);
 810          else
 811             *params = 0;
 812          break;
 813       case GL_TEXTURE_INTENSITY_SIZE:
 814          if (img->_BaseFormat != GL_INTENSITY)
 815             *params = 0;
 816          else {
 817             *params = _mesa_get_format_bits(texFormat, pname);
 818             if (*params == 0) {
 819                /* intensity probably stored as rgb texture */
 820                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 821                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 822             }
 823          }
 824          break;
 825       case GL_TEXTURE_LUMINANCE_SIZE:
 826          if (img->_BaseFormat != GL_LUMINANCE &&
 827              img->_BaseFormat != GL_LUMINANCE_ALPHA)
 828             *params = 0;
 829          else {
 830             *params = _mesa_get_format_bits(texFormat, pname);
 831             if (*params == 0) {
 832                /* luminance probably stored as rgb texture */
 833                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 834                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 835             }
 836          }
 837          break;
 838       case GL_TEXTURE_INDEX_SIZE_EXT:
 839          if (img->_BaseFormat == GL_COLOR_INDEX)
 840             *params = _mesa_get_format_bits(texFormat, pname);
 841          else
 842             *params = 0;
 843          break;
 844       case GL_TEXTURE_DEPTH_SIZE_ARB:
 845          if (ctx->Extensions.ARB_depth_texture)
 846             *params = _mesa_get_format_bits(texFormat, pname);
 847          else
 848             _mesa_error(ctx, GL_INVALID_ENUM,
 849                         "glGetTexLevelParameter[if]v(pname)");
 850          break;
 851       case GL_TEXTURE_STENCIL_SIZE_EXT:
 852          if (ctx->Extensions.EXT_packed_depth_stencil ||
 853              ctx->Extensions.ARB_framebuffer_object) {
 854             *params = _mesa_get_format_bits(texFormat, pname);
 855          }
 856          else {
 857             _mesa_error(ctx, GL_INVALID_ENUM,
 858                         "glGetTexLevelParameter[if]v(pname)");
 859          }
 860          break;
 861
 862       /* GL_ARB_texture_compression */
 863       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
 864          if (_mesa_is_format_compressed(img->TexFormat) && !isProxy) {
 865             *params = _mesa_format_image_size(texFormat, img->Width,
 866                                               img->Height, img->Depth);
 867          }
 868          else {
 869             _mesa_error(ctx, GL_INVALID_OPERATION,
 870                         "glGetTexLevelParameter[if]v(pname)");
 871          }
 872          break;
 873       case GL_TEXTURE_COMPRESSED:
 874          *params = (GLint) _mesa_is_format_compressed(img->TexFormat);
 875          break;
 876
 877       /* GL_ARB_texture_float */
 878       case GL_TEXTURE_RED_TYPE_ARB:
 879          if (ctx->Extensions.ARB_texture_float) {
 880             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE) ?
 881                _mesa_get_format_datatype(texFormat) : GL_NONE;
 882          }
 883          else {
 884             _mesa_error(ctx, GL_INVALID_ENUM,
 885                         "glGetTexLevelParameter[if]v(pname)");
 886          }
 887          break;
 888       case GL_TEXTURE_GREEN_TYPE_ARB:
 889          if (ctx->Extensions.ARB_texture_float) {
 890             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE) ?
 891                _mesa_get_format_datatype(texFormat) : GL_NONE;
 892          }
 893          else {
 894             _mesa_error(ctx, GL_INVALID_ENUM,
 895                         "glGetTexLevelParameter[if]v(pname)");
 896          }
 897          break;
 898       case GL_TEXTURE_BLUE_TYPE_ARB:
 899          if (ctx->Extensions.ARB_texture_float) {
 900             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_BLUE_SIZE) ?
 901                _mesa_get_format_datatype(texFormat) : GL_NONE;
 902          }
 903          else {
 904             _mesa_error(ctx, GL_INVALID_ENUM,
 905                         "glGetTexLevelParameter[if]v(pname)");
 906          }
 907          break;
 908       case GL_TEXTURE_ALPHA_TYPE_ARB:
 909          if (ctx->Extensions.ARB_texture_float) {
 910             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_ALPHA_SIZE) ?
 911                _mesa_get_format_datatype(texFormat) : GL_NONE;
 912          }
 913          else {
 914             _mesa_error(ctx, GL_INVALID_ENUM,
 915                         "glGetTexLevelParameter[if]v(pname)");
 916          }
 917          break;
 918       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
 919          if (ctx->Extensions.ARB_texture_float) {
 920             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_LUMINANCE_SIZE) ?
 921                _mesa_get_format_datatype(texFormat) : GL_NONE;
 922          }
 923          else {
 924             _mesa_error(ctx, GL_INVALID_ENUM,
 925                         "glGetTexLevelParameter[if]v(pname)");
 926          }
 927          break;
 928       case GL_TEXTURE_INTENSITY_TYPE_ARB:
 929          if (ctx->Extensions.ARB_texture_float) {
 930             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_INTENSITY_SIZE) ?
 931                _mesa_get_format_datatype(texFormat) : GL_NONE;
 932          }
 933          else {
 934             _mesa_error(ctx, GL_INVALID_ENUM,
 935                         "glGetTexLevelParameter[if]v(pname)");
 936          }
 937          break;
 938       case GL_TEXTURE_DEPTH_TYPE_ARB:
 939          if (ctx->Extensions.ARB_texture_float) {
 940             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_DEPTH_SIZE) ?
 941                _mesa_get_format_datatype(texFormat) : GL_NONE;
 942          }
 943          else {
 944             _mesa_error(ctx, GL_INVALID_ENUM,
 945                         "glGetTexLevelParameter[if]v(pname)");
 946          }
 947          break;
 948
 949       default:
 950          _mesa_error(ctx, GL_INVALID_ENUM,
 951                      "glGetTexLevelParameter[if]v(pname)");
 952    }
 953
 954  out:
 955    _mesa_unlock_texture(ctx, texObj);
 956 }
 957
 958
 959
 960 void GLAPIENTRY
 961 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
 962 {
 963    struct gl_texture_unit *texUnit;
 964    struct gl_texture_object *obj;
 965    GLboolean error = GL_FALSE;
 966    GET_CURRENT_CONTEXT(ctx);
 967    ASSERT_OUTSIDE_BEGIN_END(ctx);
 968
 969    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
 970       _mesa_error(ctx, GL_INVALID_OPERATION,
 971                   "glGetTexParameterfv(current unit)");
 972       return;
 973    }
 974
 975    texUnit = _mesa_get_current_tex_unit(ctx);
 976
 977    obj = _mesa_select_tex_object(ctx, texUnit, target);
 978    if (!obj) {
 979       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(target)");
 980       return;
 981    }
 982
 983    _mesa_lock_texture(ctx, obj);
 984    switch (pname) {
 985       case GL_TEXTURE_MAG_FILTER:
 986          *params = ENUM_TO_FLOAT(obj->MagFilter);
 987          break;
 988       case GL_TEXTURE_MIN_FILTER:
 989          *params = ENUM_TO_FLOAT(obj->MinFilter);
 990          break;
 991       case GL_TEXTURE_WRAP_S:
 992          *params = ENUM_TO_FLOAT(obj->WrapS);
 993          break;
 994       case GL_TEXTURE_WRAP_T:
 995          *params = ENUM_TO_FLOAT(obj->WrapT);
 996          break;
 997       case GL_TEXTURE_WRAP_R:
 998          *params = ENUM_TO_FLOAT(obj->WrapR);
 999          break;
1000       case GL_TEXTURE_BORDER_COLOR:
1001          params[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F);
1002          params[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F);
1003          params[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F);
1004          params[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F);
1005          break;
1006       case GL_TEXTURE_RESIDENT:
1007          {
1008             GLboolean resident;
1009             if (ctx->Driver.IsTextureResident)
1010                resident = ctx->Driver.IsTextureResident(ctx, obj);
1011             else
1012                resident = GL_TRUE;
1013             *params = ENUM_TO_FLOAT(resident);
1014          }
1015          break;
1016       case GL_TEXTURE_PRIORITY:
1017          *params = obj->Priority;
1018          break;
1019       case GL_TEXTURE_MIN_LOD:
1020          *params = obj->MinLod;
1021          break;
1022       case GL_TEXTURE_MAX_LOD:
1023          *params = obj->MaxLod;
1024          break;
1025       case GL_TEXTURE_BASE_LEVEL:
1026          *params = (GLfloat) obj->BaseLevel;
1027          break;
1028       case GL_TEXTURE_MAX_LEVEL:
1029          *params = (GLfloat) obj->MaxLevel;
1030          break;
1031       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1032          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1033             *params = obj->MaxAnisotropy;
1034          }
1035          else
1036             error = GL_TRUE;
1037          break;
1038       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1039          if (ctx->Extensions.ARB_shadow_ambient) {
1040             *params = obj->CompareFailValue;
1041          }
1042          else
1043             error = GL_TRUE;
1044          break;
1045       case GL_GENERATE_MIPMAP_SGIS:
1046          if (ctx->Extensions.SGIS_generate_mipmap) {
1047             *params = (GLfloat) obj->GenerateMipmap;
1048          }
1049          else
1050             error = GL_TRUE;
1051          break;
1052       case GL_TEXTURE_COMPARE_MODE_ARB:
1053          if (ctx->Extensions.ARB_shadow) {
1054             *params = (GLfloat) obj->CompareMode;
1055          }
1056          else
1057             error = GL_TRUE;
1058          break;
1059       case GL_TEXTURE_COMPARE_FUNC_ARB:
1060          if (ctx->Extensions.ARB_shadow) {
1061             *params = (GLfloat) obj->CompareFunc;
1062          }
1063          else
1064             error = GL_TRUE;
1065          break;
1066       case GL_DEPTH_TEXTURE_MODE_ARB:
1067          if (ctx->Extensions.ARB_depth_texture) {
1068             *params = (GLfloat) obj->DepthMode;
1069          }
1070          else
1071             error = GL_TRUE;
1072          break;
1073       case GL_TEXTURE_LOD_BIAS:
1074          if (ctx->Extensions.EXT_texture_lod_bias) {
1075             *params = obj->LodBias;
1076          }
1077          else
1078             error = GL_TRUE;
1079          break;
1080 #ifdef FEATURE_OES_draw_texture
1081       case GL_TEXTURE_CROP_RECT_OES:
1082          params[0] = obj->CropRect[0];
1083          params[1] = obj->CropRect[1];
1084          params[2] = obj->CropRect[2];
1085          params[3] = obj->CropRect[3];
1086          break;
1087 #endif
1088
1089       case GL_TEXTURE_SWIZZLE_R_EXT:
1090       case GL_TEXTURE_SWIZZLE_G_EXT:
1091       case GL_TEXTURE_SWIZZLE_B_EXT:
1092       case GL_TEXTURE_SWIZZLE_A_EXT:
1093          if (ctx->Extensions.EXT_texture_swizzle) {
1094             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1095             *params = (GLfloat) obj->Swizzle[comp];
1096          }
1097          else {
1098             error = GL_TRUE;
1099          }
1100          break;
1101
1102       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1103          if (ctx->Extensions.EXT_texture_swizzle) {
1104             GLuint comp;
1105             for (comp = 0; comp < 4; comp++) {
1106                params[comp] = (GLfloat) obj->Swizzle[comp];
1107             }
1108          }
1109          else {
1110             error = GL_TRUE;
1111          }
1112          break;
1113
1114       default:
1115          error = GL_TRUE;
1116          break;
1117    }
1118
1119    if (error)
1120       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)",
1121                   pname);
1122
1123    _mesa_unlock_texture(ctx, obj);
1124 }
1125
1126
1127 void GLAPIENTRY
1128 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1129 {
1130    struct gl_texture_unit *texUnit;
1131    struct gl_texture_object *obj;
1132    GLboolean error = GL_FALSE;
1133    GET_CURRENT_CONTEXT(ctx);
1134    ASSERT_OUTSIDE_BEGIN_END(ctx);
1135
1136    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
1137       _mesa_error(ctx, GL_INVALID_OPERATION,
1138                   "glGetTexParameteriv(current unit)");
1139       return;
1140    }
1141
1142    texUnit = _mesa_get_current_tex_unit(ctx);
1143
1144    obj = _mesa_select_tex_object(ctx, texUnit, target);
1145    if (!obj) {
1146       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(target)");
1147       return;
1148    }
1149
1150    switch (pname) {
1151       case GL_TEXTURE_MAG_FILTER:
1152          *params = (GLint) obj->MagFilter;
1153          break;;
1154       case GL_TEXTURE_MIN_FILTER:
1155          *params = (GLint) obj->MinFilter;
1156          break;;
1157       case GL_TEXTURE_WRAP_S:
1158          *params = (GLint) obj->WrapS;
1159          break;;
1160       case GL_TEXTURE_WRAP_T:
1161          *params = (GLint) obj->WrapT;
1162          break;;
1163       case GL_TEXTURE_WRAP_R:
1164          *params = (GLint) obj->WrapR;
1165          break;;
1166       case GL_TEXTURE_BORDER_COLOR:
1167          {
1168             GLfloat b[4];
1169             b[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F);
1170             b[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F);
1171             b[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F);
1172             b[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F);
1173             params[0] = FLOAT_TO_INT(b[0]);
1174             params[1] = FLOAT_TO_INT(b[1]);
1175             params[2] = FLOAT_TO_INT(b[2]);
1176             params[3] = FLOAT_TO_INT(b[3]);
1177          }
1178          break;;
1179       case GL_TEXTURE_RESIDENT:
1180          {
1181             GLboolean resident;
1182             if (ctx->Driver.IsTextureResident)
1183                resident = ctx->Driver.IsTextureResident(ctx, obj);
1184             else
1185                resident = GL_TRUE;
1186             *params = (GLint) resident;
1187          }
1188          break;;
1189       case GL_TEXTURE_PRIORITY:
1190          *params = FLOAT_TO_INT(obj->Priority);
1191          break;;
1192       case GL_TEXTURE_MIN_LOD:
1193          *params = (GLint) obj->MinLod;
1194          break;;
1195       case GL_TEXTURE_MAX_LOD:
1196          *params = (GLint) obj->MaxLod;
1197          break;;
1198       case GL_TEXTURE_BASE_LEVEL:
1199          *params = obj->BaseLevel;
1200          break;;
1201       case GL_TEXTURE_MAX_LEVEL:
1202          *params = obj->MaxLevel;
1203          break;;
1204       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1205          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1206             *params = (GLint) obj->MaxAnisotropy;
1207          }
1208          else {
1209             error = GL_TRUE;
1210          }
1211          break;
1212       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1213          if (ctx->Extensions.ARB_shadow_ambient) {
1214             *params = (GLint) FLOAT_TO_INT(obj->CompareFailValue);
1215          }
1216          else {
1217             error = GL_TRUE;
1218          }
1219          break;
1220       case GL_GENERATE_MIPMAP_SGIS:
1221          if (ctx->Extensions.SGIS_generate_mipmap) {
1222             *params = (GLint) obj->GenerateMipmap;
1223          }
1224          else {
1225             error = GL_TRUE;
1226          }
1227          break;
1228       case GL_TEXTURE_COMPARE_MODE_ARB:
1229          if (ctx->Extensions.ARB_shadow) {
1230             *params = (GLint) obj->CompareMode;
1231          }
1232          else {
1233             error = GL_TRUE;
1234          }
1235          break;
1236       case GL_TEXTURE_COMPARE_FUNC_ARB:
1237          if (ctx->Extensions.ARB_shadow) {
1238             *params = (GLint) obj->CompareFunc;
1239          }
1240          else {
1241             error = GL_TRUE;
1242          }
1243          break;
1244       case GL_DEPTH_TEXTURE_MODE_ARB:
1245          if (ctx->Extensions.ARB_depth_texture) {
1246             *params = (GLint) obj->DepthMode;
1247          }
1248          else {
1249             error = GL_TRUE;
1250          }
1251          break;
1252       case GL_TEXTURE_LOD_BIAS:
1253          if (ctx->Extensions.EXT_texture_lod_bias) {
1254             *params = (GLint) obj->LodBias;
1255          }
1256          else {
1257             error = GL_TRUE;
1258          }
1259          break;
1260 #ifdef FEATURE_OES_draw_texture
1261       case GL_TEXTURE_CROP_RECT_OES:
1262          params[0] = obj->CropRect[0];
1263          params[1] = obj->CropRect[1];
1264          params[2] = obj->CropRect[2];
1265          params[3] = obj->CropRect[3];
1266          break;
1267 #endif
1268       case GL_TEXTURE_SWIZZLE_R_EXT:
1269       case GL_TEXTURE_SWIZZLE_G_EXT:
1270       case GL_TEXTURE_SWIZZLE_B_EXT:
1271       case GL_TEXTURE_SWIZZLE_A_EXT:
1272          if (ctx->Extensions.EXT_texture_swizzle) {
1273             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1274             *params = obj->Swizzle[comp];
1275          }
1276          else {
1277             error = GL_TRUE;
1278          }
1279          break;
1280
1281       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1282          if (ctx->Extensions.EXT_texture_swizzle) {
1283             COPY_4V(params, obj->Swizzle);
1284          }
1285          else {
1286             error = GL_TRUE;
1287          }
1288          break;
1289
1290       default:
1291          ; /* silence warnings */
1292    }
1293
1294    if (error)
1295       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)",
1296                   pname);
1297
1298    _mesa_unlock_texture(ctx, obj);
1299 }