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/formats.h"
  37 #include "main/macros.h"
  38 #include "main/texcompress.h"
  39 #include "main/texparam.h"
  40 #include "main/teximage.h"
  41 #include "main/texstate.h"
  42 #include "program/prog_instruction.h"
  43
  44
  45 /**
  46  * Check if a coordinate wrap mode is supported for the texture target.
  47  * \return GL_TRUE if legal, GL_FALSE otherwise
  48  */
  49 static GLboolean
  50 validate_texture_wrap_mode(GLcontext * ctx, GLenum target, GLenum wrap)
  51 {
  52    const struct gl_extensions * const e = & ctx->Extensions;
  53
  54    if (wrap == GL_CLAMP || wrap == GL_CLAMP_TO_EDGE ||
  55        (wrap == GL_CLAMP_TO_BORDER && e->ARB_texture_border_clamp)) {
  56       /* any texture target */
  57       return GL_TRUE;
  58    }
  59    else if (target != GL_TEXTURE_RECTANGLE_NV &&
  60             (wrap == GL_REPEAT ||
  61              (wrap == GL_MIRRORED_REPEAT &&
  62               e->ARB_texture_mirrored_repeat) ||
  63              (wrap == GL_MIRROR_CLAMP_EXT &&
  64               (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) ||
  65              (wrap == GL_MIRROR_CLAMP_TO_EDGE_EXT &&
  66               (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) ||
  67              (wrap == GL_MIRROR_CLAMP_TO_BORDER_EXT &&
  68               (e->EXT_texture_mirror_clamp)))) {
  69       /* non-rectangle texture */
  70       return GL_TRUE;
  71    }
  72
  73    _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)", wrap );
  74    return GL_FALSE;
  75 }
  76
  77
  78 /**
  79  * Get current texture object for given target.
  80  * Return NULL if any error (and record the error).
  81  * Note that this is different from _mesa_select_tex_object() in that proxy
  82  * targets are not accepted.
  83  * Only the glGetTexLevelParameter() functions accept proxy targets.
  84  */
  85 static struct gl_texture_object *
  86 get_texobj(GLcontext *ctx, GLenum target, GLboolean get)
  87 {
  88    struct gl_texture_unit *texUnit;
  89
  90    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
  91       _mesa_error(ctx, GL_INVALID_OPERATION,
  92                   "gl%sTexParameter(current unit)", get ? "Get" : "");
  93       return NULL;
  94    }
  95
  96    texUnit = _mesa_get_current_tex_unit(ctx);
  97
  98    switch (target) {
  99    case GL_TEXTURE_1D:
 100       return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 101    case GL_TEXTURE_2D:
 102       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 103    case GL_TEXTURE_3D:
 104       return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 105    case GL_TEXTURE_CUBE_MAP:
 106       if (ctx->Extensions.ARB_texture_cube_map) {
 107          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 108       }
 109       break;
 110    case GL_TEXTURE_RECTANGLE_NV:
 111       if (ctx->Extensions.NV_texture_rectangle) {
 112          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 113       }
 114       break;
 115    case GL_TEXTURE_1D_ARRAY_EXT:
 116       if (ctx->Extensions.MESA_texture_array) {
 117          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 118       }
 119       break;
 120    case GL_TEXTURE_2D_ARRAY_EXT:
 121       if (ctx->Extensions.MESA_texture_array) {
 122          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 123       }
 124       break;
 125    default:
 126       ;
 127    }
 128
 129    _mesa_error(ctx, GL_INVALID_ENUM,
 130                   "gl%sTexParameter(target)", get ? "Get" : "");
 131    return NULL;
 132 }
 133
 134
 135 /**
 136  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 137  * \return -1 if error.
 138  */
 139 static GLint
 140 comp_to_swizzle(GLenum comp)
 141 {
 142    switch (comp) {
 143    case GL_RED:
 144       return SWIZZLE_X;
 145    case GL_GREEN:
 146       return SWIZZLE_Y;
 147    case GL_BLUE:
 148       return SWIZZLE_Z;
 149    case GL_ALPHA:
 150       return SWIZZLE_W;
 151    case GL_ZERO:
 152       return SWIZZLE_ZERO;
 153    case GL_ONE:
 154       return SWIZZLE_ONE;
 155    default:
 156       return -1;
 157    }
 158 }
 159
 160
 161 static void
 162 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 163 {
 164    ASSERT(comp < 4);
 165    ASSERT(swz <= SWIZZLE_NIL);
 166    {
 167       GLuint mask = 0x7 << (3 * comp);
 168       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 169       *swizzle = s;
 170    }
 171 }
 172
 173
 174 /**
 175  * This is called just prior to changing any texture object state.
 176  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 177  * state flag and then mark the texture object as 'incomplete' so that any
 178  * per-texture derived state gets recomputed.
 179  */
 180 static INLINE void
 181 flush(GLcontext *ctx, struct gl_texture_object *texObj)
 182 {
 183    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 184    texObj->_Complete = GL_FALSE;
 185 }
 186
 187
 188 /**
 189  * Set an integer-valued texture parameter
 190  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 191  */
 192 static GLboolean
 193 set_tex_parameteri(GLcontext *ctx,
 194                    struct gl_texture_object *texObj,
 195                    GLenum pname, const GLint *params)
 196 {
 197    switch (pname) {
 198    case GL_TEXTURE_MIN_FILTER:
 199       if (texObj->MinFilter == params[0])
 200          return GL_FALSE;
 201       switch (params[0]) {
 202       case GL_NEAREST:
 203       case GL_LINEAR:
 204          flush(ctx, texObj);
 205          texObj->MinFilter = params[0];
 206          return GL_TRUE;
 207       case GL_NEAREST_MIPMAP_NEAREST:
 208       case GL_LINEAR_MIPMAP_NEAREST:
 209       case GL_NEAREST_MIPMAP_LINEAR:
 210       case GL_LINEAR_MIPMAP_LINEAR:
 211          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV) {
 212             flush(ctx, texObj);
 213             texObj->MinFilter = params[0];
 214             return GL_TRUE;
 215          }
 216          /* fall-through */
 217       default:
 218          _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)",
 219                       params[0] );
 220       }
 221       return GL_FALSE;
 222
 223    case GL_TEXTURE_MAG_FILTER:
 224       if (texObj->MagFilter == params[0])
 225          return GL_FALSE;
 226       switch (params[0]) {
 227       case GL_NEAREST:
 228       case GL_LINEAR:
 229          flush(ctx, texObj);
 230          texObj->MagFilter = params[0];
 231          return GL_TRUE;
 232       default:
 233          _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)",
 234                       params[0]);
 235       }
 236       return GL_FALSE;
 237
 238    case GL_TEXTURE_WRAP_S:
 239       if (texObj->WrapS == params[0])
 240          return GL_FALSE;
 241       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 242          flush(ctx, texObj);
 243          texObj->WrapS = params[0];
 244          return GL_TRUE;
 245       }
 246       return GL_FALSE;
 247
 248    case GL_TEXTURE_WRAP_T:
 249       if (texObj->WrapT == params[0])
 250          return GL_FALSE;
 251       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 252          flush(ctx, texObj);
 253          texObj->WrapT = params[0];
 254          return GL_TRUE;
 255       }
 256       return GL_FALSE;
 257
 258    case GL_TEXTURE_WRAP_R:
 259       if (texObj->WrapR == params[0])
 260          return GL_FALSE;
 261       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 262          flush(ctx, texObj);
 263          texObj->WrapR = params[0];
 264          return GL_TRUE;
 265       }
 266       return GL_FALSE;
 267
 268    case GL_TEXTURE_BASE_LEVEL:
 269       if (texObj->BaseLevel == params[0])
 270          return GL_FALSE;
 271       if (params[0] < 0 ||
 272           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 273          _mesa_error(ctx, GL_INVALID_VALUE,
 274                      "glTexParameter(param=%d)", params[0]);
 275          return GL_FALSE;
 276       }
 277       flush(ctx, texObj);
 278       texObj->BaseLevel = params[0];
 279       return GL_TRUE;
 280
 281    case GL_TEXTURE_MAX_LEVEL:
 282       if (texObj->MaxLevel == params[0])
 283          return GL_FALSE;
 284       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 285          _mesa_error(ctx, GL_INVALID_OPERATION,
 286                      "glTexParameter(param=%d)", params[0]);
 287          return GL_FALSE;
 288       }
 289       flush(ctx, texObj);
 290       texObj->MaxLevel = params[0];
 291       return GL_TRUE;
 292
 293    case GL_GENERATE_MIPMAP_SGIS:
 294       if (texObj->GenerateMipmap != params[0]) {
 295          flush(ctx, texObj);
 296          texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 297          return GL_TRUE;
 298       }
 299       return GL_FALSE;
 300
 301    case GL_TEXTURE_COMPARE_MODE_ARB:
 302       if (ctx->Extensions.ARB_shadow &&
 303           (params[0] == GL_NONE ||
 304            params[0] == GL_COMPARE_R_TO_TEXTURE_ARB)) {
 305          if (texObj->CompareMode != params[0]) {
 306             flush(ctx, texObj);
 307             texObj->CompareMode = params[0];
 308             return GL_TRUE;
 309          }
 310          return GL_FALSE;
 311       }
 312       else {
 313          _mesa_error(ctx, GL_INVALID_ENUM,
 314                      "glTexParameter(GL_TEXTURE_COMPARE_MODE_ARB)");
 315       }
 316       return GL_FALSE;
 317
 318    case GL_TEXTURE_COMPARE_FUNC_ARB:
 319       if (ctx->Extensions.ARB_shadow) {
 320          if (texObj->CompareFunc == params[0])
 321             return GL_FALSE;
 322          switch (params[0]) {
 323          case GL_LEQUAL:
 324          case GL_GEQUAL:
 325             flush(ctx, texObj);
 326             texObj->CompareFunc = params[0];
 327             return GL_TRUE;
 328          case GL_EQUAL:
 329          case GL_NOTEQUAL:
 330          case GL_LESS:
 331          case GL_GREATER:
 332          case GL_ALWAYS:
 333          case GL_NEVER:
 334             if (ctx->Extensions.EXT_shadow_funcs) {
 335                flush(ctx, texObj);
 336                texObj->CompareFunc = params[0];
 337                return GL_TRUE;
 338             }
 339             /* fall-through */
 340          default:
 341             _mesa_error(ctx, GL_INVALID_ENUM,
 342                         "glTexParameter(GL_TEXTURE_COMPARE_FUNC_ARB)");
 343          }
 344       }
 345       else {
 346          _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 347       }
 348       return GL_FALSE;
 349
 350    case GL_DEPTH_TEXTURE_MODE_ARB:
 351       if (ctx->Extensions.ARB_depth_texture &&
 352           (params[0] == GL_LUMINANCE ||
 353            params[0] == GL_INTENSITY ||
 354            params[0] == GL_ALPHA)) {
 355          if (texObj->DepthMode != params[0]) {
 356             flush(ctx, texObj);
 357             texObj->DepthMode = params[0];
 358             return GL_TRUE;
 359          }
 360       }
 361       else {
 362          _mesa_error(ctx, GL_INVALID_ENUM,
 363                      "glTexParameter(GL_DEPTH_TEXTURE_MODE_ARB)");
 364       }
 365       return GL_FALSE;
 366
 367 #if FEATURE_OES_draw_texture
 368    case GL_TEXTURE_CROP_RECT_OES:
 369       texObj->CropRect[0] = params[0];
 370       texObj->CropRect[1] = params[1];
 371       texObj->CropRect[2] = params[2];
 372       texObj->CropRect[3] = params[3];
 373       return GL_TRUE;
 374 #endif
 375
 376    case GL_TEXTURE_SWIZZLE_R_EXT:
 377    case GL_TEXTURE_SWIZZLE_G_EXT:
 378    case GL_TEXTURE_SWIZZLE_B_EXT:
 379    case GL_TEXTURE_SWIZZLE_A_EXT:
 380       if (ctx->Extensions.EXT_texture_swizzle) {
 381          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 382          const GLint swz = comp_to_swizzle(params[0]);
 383          if (swz < 0) {
 384             _mesa_error(ctx, GL_INVALID_OPERATION,
 385                         "glTexParameter(swizzle 0x%x)", params[0]);
 386             return GL_FALSE;
 387          }
 388          ASSERT(comp < 4);
 389          if (swz >= 0) {
 390             flush(ctx, texObj);
 391             texObj->Swizzle[comp] = params[0];
 392             set_swizzle_component(&texObj->_Swizzle, comp, swz);
 393             return GL_TRUE;
 394          }
 395       }
 396       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 397       return GL_FALSE;
 398
 399    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 400       if (ctx->Extensions.EXT_texture_swizzle) {
 401          GLuint comp;
 402          flush(ctx, texObj);
 403          for (comp = 0; comp < 4; comp++) {
 404             const GLint swz = comp_to_swizzle(params[comp]);
 405             if (swz >= 0) {
 406                texObj->Swizzle[comp] = params[comp];
 407                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 408             }
 409             else {
 410                _mesa_error(ctx, GL_INVALID_OPERATION,
 411                            "glTexParameter(swizzle 0x%x)", params[comp]);
 412                return GL_FALSE;
 413             }
 414          }
 415          return GL_TRUE;
 416       }
 417       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 418       return GL_FALSE;
 419
 420    default:
 421       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 422    }
 423    return GL_FALSE;
 424 }
 425
 426
 427 /**
 428  * Set a float-valued texture parameter
 429  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 430  */
 431 static GLboolean
 432 set_tex_parameterf(GLcontext *ctx,
 433                    struct gl_texture_object *texObj,
 434                    GLenum pname, const GLfloat *params)
 435 {
 436    switch (pname) {
 437    case GL_TEXTURE_MIN_LOD:
 438       if (texObj->MinLod == params[0])
 439          return GL_FALSE;
 440       flush(ctx, texObj);
 441       texObj->MinLod = params[0];
 442       return GL_TRUE;
 443
 444    case GL_TEXTURE_MAX_LOD:
 445       if (texObj->MaxLod == params[0])
 446          return GL_FALSE;
 447       flush(ctx, texObj);
 448       texObj->MaxLod = params[0];
 449       return GL_TRUE;
 450
 451    case GL_TEXTURE_PRIORITY:
 452       flush(ctx, texObj);
 453       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 454       return GL_TRUE;
 455
 456    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 457       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 458          if (texObj->MaxAnisotropy == params[0])
 459             return GL_FALSE;
 460          if (params[0] < 1.0) {
 461             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 462             return GL_FALSE;
 463          }
 464          flush(ctx, texObj);
 465          /* clamp to max, that's what NVIDIA does */
 466          texObj->MaxAnisotropy = MIN2(params[0],
 467                                       ctx->Const.MaxTextureMaxAnisotropy);
 468          return GL_TRUE;
 469       }
 470       else {
 471          static GLuint count = 0;
 472          if (count++ < 10)
 473             _mesa_error(ctx, GL_INVALID_ENUM,
 474                         "glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)");
 475       }
 476       return GL_FALSE;
 477
 478    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 479       if (ctx->Extensions.ARB_shadow_ambient) {
 480          if (texObj->CompareFailValue != params[0]) {
 481             flush(ctx, texObj);
 482             texObj->CompareFailValue = CLAMP(params[0], 0.0F, 1.0F);
 483             return GL_TRUE;
 484          }
 485       }
 486       else {
 487          _mesa_error(ctx, GL_INVALID_ENUM,
 488                     "glTexParameter(pname=GL_TEXTURE_COMPARE_FAIL_VALUE_ARB)");
 489       }
 490       return GL_FALSE;
 491
 492    case GL_TEXTURE_LOD_BIAS:
 493       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias */
 494       if (ctx->Extensions.EXT_texture_lod_bias) {
 495          if (texObj->LodBias != params[0]) {
 496             flush(ctx, texObj);
 497             texObj->LodBias = params[0];
 498             return GL_TRUE;
 499          }
 500          return GL_FALSE;
 501       }
 502       break;
 503
 504    case GL_TEXTURE_BORDER_COLOR:
 505       flush(ctx, texObj);
 506       texObj->BorderColor.f[RCOMP] = params[0];
 507       texObj->BorderColor.f[GCOMP] = params[1];
 508       texObj->BorderColor.f[BCOMP] = params[2];
 509       texObj->BorderColor.f[ACOMP] = params[3];
 510       return GL_TRUE;
 511
 512    default:
 513       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 514    }
 515    return GL_FALSE;
 516 }
 517
 518
 519 void GLAPIENTRY
 520 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 521 {
 522    GLboolean need_update;
 523    struct gl_texture_object *texObj;
 524    GET_CURRENT_CONTEXT(ctx);
 525    ASSERT_OUTSIDE_BEGIN_END(ctx);
 526
 527    texObj = get_texobj(ctx, target, GL_FALSE);
 528    if (!texObj)
 529       return;
 530
 531    switch (pname) {
 532    case GL_TEXTURE_MIN_FILTER:
 533    case GL_TEXTURE_MAG_FILTER:
 534    case GL_TEXTURE_WRAP_S:
 535    case GL_TEXTURE_WRAP_T:
 536    case GL_TEXTURE_WRAP_R:
 537    case GL_TEXTURE_BASE_LEVEL:
 538    case GL_TEXTURE_MAX_LEVEL:
 539    case GL_GENERATE_MIPMAP_SGIS:
 540    case GL_TEXTURE_COMPARE_MODE_ARB:
 541    case GL_TEXTURE_COMPARE_FUNC_ARB:
 542    case GL_DEPTH_TEXTURE_MODE_ARB:
 543       {
 544          /* convert float param to int */
 545          GLint p[4];
 546          p[0] = (GLint) param;
 547          p[1] = p[2] = p[3] = 0;
 548          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 549       }
 550       break;
 551    default:
 552       {
 553          /* this will generate an error if pname is illegal */
 554          GLfloat p[4];
 555          p[0] = param;
 556          p[1] = p[2] = p[3] = 0.0F;
 557          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 558       }
 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, GL_FALSE);
 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[4];
 594          p[0] = (GLint) params[0];
 595          p[1] = p[2] = p[3] = 0;
 596          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 597       }
 598       break;
 599
 600 #if FEATURE_OES_draw_texture
 601    case GL_TEXTURE_CROP_RECT_OES:
 602       {
 603          /* convert float params to int */
 604          GLint iparams[4];
 605          iparams[0] = (GLint) params[0];
 606          iparams[1] = (GLint) params[1];
 607          iparams[2] = (GLint) params[2];
 608          iparams[3] = (GLint) params[3];
 609          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 610       }
 611       break;
 612 #endif
 613
 614    default:
 615       /* this will generate an error if pname is illegal */
 616       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 617    }
 618
 619    if (ctx->Driver.TexParameter && need_update) {
 620       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 621    }
 622 }
 623
 624
 625 void GLAPIENTRY
 626 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 627 {
 628    GLboolean need_update;
 629    struct gl_texture_object *texObj;
 630    GET_CURRENT_CONTEXT(ctx);
 631    ASSERT_OUTSIDE_BEGIN_END(ctx);
 632
 633    texObj = get_texobj(ctx, target, GL_FALSE);
 634    if (!texObj)
 635       return;
 636
 637    switch (pname) {
 638    case GL_TEXTURE_MIN_LOD:
 639    case GL_TEXTURE_MAX_LOD:
 640    case GL_TEXTURE_PRIORITY:
 641    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 642    case GL_TEXTURE_LOD_BIAS:
 643    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 644       {
 645          GLfloat fparam[4];
 646          fparam[0] = (GLfloat) param;
 647          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 648          /* convert int param to float */
 649          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 650       }
 651       break;
 652    default:
 653       /* this will generate an error if pname is illegal */
 654       {
 655          GLint iparam[4];
 656          iparam[0] = param;
 657          iparam[1] = iparam[2] = iparam[3] = 0;
 658          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 659       }
 660    }
 661
 662    if (ctx->Driver.TexParameter && need_update) {
 663       GLfloat fparam = (GLfloat) param;
 664       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 665    }
 666 }
 667
 668
 669 void GLAPIENTRY
 670 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 671 {
 672    GLboolean need_update;
 673    struct gl_texture_object *texObj;
 674    GET_CURRENT_CONTEXT(ctx);
 675    ASSERT_OUTSIDE_BEGIN_END(ctx);
 676
 677    texObj = get_texobj(ctx, target, GL_FALSE);
 678    if (!texObj)
 679       return;
 680
 681    switch (pname) {
 682    case GL_TEXTURE_BORDER_COLOR:
 683       {
 684          /* convert int params to float */
 685          GLfloat fparams[4];
 686          fparams[0] = INT_TO_FLOAT(params[0]);
 687          fparams[1] = INT_TO_FLOAT(params[1]);
 688          fparams[2] = INT_TO_FLOAT(params[2]);
 689          fparams[3] = INT_TO_FLOAT(params[3]);
 690          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 691       }
 692       break;
 693    case GL_TEXTURE_MIN_LOD:
 694    case GL_TEXTURE_MAX_LOD:
 695    case GL_TEXTURE_PRIORITY:
 696    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 697    case GL_TEXTURE_LOD_BIAS:
 698    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 699       {
 700          /* convert int param to float */
 701          GLfloat fparams[4];
 702          fparams[0] = (GLfloat) params[0];
 703          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 704          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 705       }
 706       break;
 707    default:
 708       /* this will generate an error if pname is illegal */
 709       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 710    }
 711
 712    if (ctx->Driver.TexParameter && need_update) {
 713       GLfloat fparams[4];
 714       fparams[0] = INT_TO_FLOAT(params[0]);
 715       if (pname == GL_TEXTURE_BORDER_COLOR ||
 716           pname == GL_TEXTURE_CROP_RECT_OES) {
 717          fparams[1] = INT_TO_FLOAT(params[1]);
 718          fparams[2] = INT_TO_FLOAT(params[2]);
 719          fparams[3] = INT_TO_FLOAT(params[3]);
 720       }
 721       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 722    }
 723 }
 724
 725
 726 /**
 727  * Set tex parameter to integer value(s).  Primarily intended to set
 728  * integer-valued texture border color (for integer-valued textures).
 729  * New in GL 3.0.
 730  */
 731 void GLAPIENTRY
 732 _mesa_TexParameterIiv(GLenum target, GLenum pname, const GLint *params)
 733 {
 734    struct gl_texture_object *texObj;
 735    GET_CURRENT_CONTEXT(ctx);
 736    ASSERT_OUTSIDE_BEGIN_END(ctx);
 737
 738    texObj = get_texobj(ctx, target, GL_FALSE);
 739    if (!texObj)
 740       return;
 741
 742    switch (pname) {
 743    case GL_TEXTURE_BORDER_COLOR:
 744       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 745       /* set the integer-valued border color */
 746       COPY_4V(texObj->BorderColor.i, params);
 747       break;
 748    default:
 749       _mesa_TexParameteriv(target, pname, params);
 750       break;
 751    }
 752    /* XXX no driver hook for TexParameterIiv() yet */
 753 }
 754
 755
 756 /**
 757  * Set tex parameter to unsigned integer value(s).  Primarily intended to set
 758  * uint-valued texture border color (for integer-valued textures).
 759  * New in GL 3.0
 760  */
 761 void GLAPIENTRY
 762 _mesa_TexParameterIuiv(GLenum target, GLenum pname, const GLuint *params)
 763 {
 764    struct gl_texture_object *texObj;
 765    GET_CURRENT_CONTEXT(ctx);
 766    ASSERT_OUTSIDE_BEGIN_END(ctx);
 767
 768    texObj = get_texobj(ctx, target, GL_FALSE);
 769    if (!texObj)
 770       return;
 771
 772    switch (pname) {
 773    case GL_TEXTURE_BORDER_COLOR:
 774       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 775       /* set the unsigned integer-valued border color */
 776       COPY_4V(texObj->BorderColor.ui, params);
 777       break;
 778    default:
 779       _mesa_TexParameteriv(target, pname, (const GLint *) params);
 780       break;
 781    }
 782    /* XXX no driver hook for TexParameterIuiv() yet */
 783 }
 784
 785
 786
 787
 788 void GLAPIENTRY
 789 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
 790                               GLenum pname, GLfloat *params )
 791 {
 792    GLint iparam;
 793    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
 794    *params = (GLfloat) iparam;
 795 }
 796
 797
 798 void GLAPIENTRY
 799 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
 800                               GLenum pname, GLint *params )
 801 {
 802    const struct gl_texture_unit *texUnit;
 803    struct gl_texture_object *texObj;
 804    const struct gl_texture_image *img = NULL;
 805    GLboolean isProxy;
 806    GLint maxLevels;
 807    gl_format texFormat;
 808    GET_CURRENT_CONTEXT(ctx);
 809    ASSERT_OUTSIDE_BEGIN_END(ctx);
 810
 811    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
 812       _mesa_error(ctx, GL_INVALID_OPERATION,
 813                   "glGetTexLevelParameteriv(current unit)");
 814       return;
 815    }
 816
 817    texUnit = _mesa_get_current_tex_unit(ctx);
 818
 819    /* this will catch bad target values */
 820    maxLevels = _mesa_max_texture_levels(ctx, target);
 821    if (maxLevels == 0) {
 822       _mesa_error(ctx, GL_INVALID_ENUM,
 823                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
 824       return;
 825    }
 826
 827    if (level < 0 || level >= maxLevels) {
 828       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
 829       return;
 830    }
 831
 832    texObj = _mesa_select_tex_object(ctx, texUnit, target);
 833    _mesa_lock_texture(ctx, texObj);
 834
 835    img = _mesa_select_tex_image(ctx, texObj, target, level);
 836    if (!img || !img->TexFormat) {
 837       /* undefined texture image */
 838       if (pname == GL_TEXTURE_COMPONENTS)
 839          *params = 1;
 840       else
 841          *params = 0;
 842       goto out;
 843    }
 844
 845    texFormat = img->TexFormat;
 846
 847    isProxy = _mesa_is_proxy_texture(target);
 848
 849    switch (pname) {
 850       case GL_TEXTURE_WIDTH:
 851          *params = img->Width;
 852          break;
 853       case GL_TEXTURE_HEIGHT:
 854          *params = img->Height;
 855          break;
 856       case GL_TEXTURE_DEPTH:
 857          *params = img->Depth;
 858          break;
 859       case GL_TEXTURE_INTERNAL_FORMAT:
 860          if (_mesa_is_format_compressed(img->TexFormat)) {
 861             /* need to return the actual compressed format */
 862             *params = _mesa_compressed_format_to_glenum(ctx, img->TexFormat);
 863          }
 864          else {
 865             /* return the user's requested internal format */
 866             *params = img->InternalFormat;
 867          }
 868          break;
 869       case GL_TEXTURE_BORDER:
 870          *params = img->Border;
 871          break;
 872       case GL_TEXTURE_RED_SIZE:
 873       case GL_TEXTURE_GREEN_SIZE:
 874       case GL_TEXTURE_BLUE_SIZE:
 875          if (img->_BaseFormat == GL_RGB || img->_BaseFormat == GL_RGBA)
 876             *params = _mesa_get_format_bits(texFormat, pname);
 877          else
 878             *params = 0;
 879          break;
 880       case GL_TEXTURE_ALPHA_SIZE:
 881          if (img->_BaseFormat == GL_ALPHA ||
 882              img->_BaseFormat == GL_LUMINANCE_ALPHA ||
 883              img->_BaseFormat == GL_RGBA)
 884             *params = _mesa_get_format_bits(texFormat, pname);
 885          else
 886             *params = 0;
 887          break;
 888       case GL_TEXTURE_INTENSITY_SIZE:
 889          if (img->_BaseFormat != GL_INTENSITY)
 890             *params = 0;
 891          else {
 892             *params = _mesa_get_format_bits(texFormat, pname);
 893             if (*params == 0) {
 894                /* intensity probably stored as rgb texture */
 895                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 896                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 897             }
 898          }
 899          break;
 900       case GL_TEXTURE_LUMINANCE_SIZE:
 901          if (img->_BaseFormat != GL_LUMINANCE &&
 902              img->_BaseFormat != GL_LUMINANCE_ALPHA)
 903             *params = 0;
 904          else {
 905             *params = _mesa_get_format_bits(texFormat, pname);
 906             if (*params == 0) {
 907                /* luminance probably stored as rgb texture */
 908                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 909                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 910             }
 911          }
 912          break;
 913       case GL_TEXTURE_INDEX_SIZE_EXT:
 914          if (img->_BaseFormat == GL_COLOR_INDEX)
 915             *params = _mesa_get_format_bits(texFormat, pname);
 916          else
 917             *params = 0;
 918          break;
 919       case GL_TEXTURE_DEPTH_SIZE_ARB:
 920          if (ctx->Extensions.ARB_depth_texture)
 921             *params = _mesa_get_format_bits(texFormat, pname);
 922          else
 923             _mesa_error(ctx, GL_INVALID_ENUM,
 924                         "glGetTexLevelParameter[if]v(pname)");
 925          break;
 926       case GL_TEXTURE_STENCIL_SIZE_EXT:
 927          if (ctx->Extensions.EXT_packed_depth_stencil ||
 928              ctx->Extensions.ARB_framebuffer_object) {
 929             *params = _mesa_get_format_bits(texFormat, pname);
 930          }
 931          else {
 932             _mesa_error(ctx, GL_INVALID_ENUM,
 933                         "glGetTexLevelParameter[if]v(pname)");
 934          }
 935          break;
 936       case GL_TEXTURE_SHARED_SIZE:
 937          if (ctx->VersionMajor >= 3) {
 938             /* XXX return number of exponent bits for shared exponent texture
 939              * formats, like GL_RGB9_E5.
 940              */
 941             *params = 0;
 942          }
 943          else {
 944             _mesa_error(ctx, GL_INVALID_ENUM,
 945                         "glGetTexLevelParameter[if]v(pname)");
 946          }
 947          break;
 948
 949       /* GL_ARB_texture_compression */
 950       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
 951          if (_mesa_is_format_compressed(img->TexFormat) && !isProxy) {
 952             *params = _mesa_format_image_size(texFormat, img->Width,
 953                                               img->Height, img->Depth);
 954          }
 955          else {
 956             _mesa_error(ctx, GL_INVALID_OPERATION,
 957                         "glGetTexLevelParameter[if]v(pname)");
 958          }
 959          break;
 960       case GL_TEXTURE_COMPRESSED:
 961          *params = (GLint) _mesa_is_format_compressed(img->TexFormat);
 962          break;
 963
 964       /* GL_ARB_texture_float */
 965       case GL_TEXTURE_RED_TYPE_ARB:
 966          if (ctx->Extensions.ARB_texture_float) {
 967             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE) ?
 968                _mesa_get_format_datatype(texFormat) : GL_NONE;
 969          }
 970          else {
 971             _mesa_error(ctx, GL_INVALID_ENUM,
 972                         "glGetTexLevelParameter[if]v(pname)");
 973          }
 974          break;
 975       case GL_TEXTURE_GREEN_TYPE_ARB:
 976          if (ctx->Extensions.ARB_texture_float) {
 977             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE) ?
 978                _mesa_get_format_datatype(texFormat) : GL_NONE;
 979          }
 980          else {
 981             _mesa_error(ctx, GL_INVALID_ENUM,
 982                         "glGetTexLevelParameter[if]v(pname)");
 983          }
 984          break;
 985       case GL_TEXTURE_BLUE_TYPE_ARB:
 986          if (ctx->Extensions.ARB_texture_float) {
 987             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_BLUE_SIZE) ?
 988                _mesa_get_format_datatype(texFormat) : GL_NONE;
 989          }
 990          else {
 991             _mesa_error(ctx, GL_INVALID_ENUM,
 992                         "glGetTexLevelParameter[if]v(pname)");
 993          }
 994          break;
 995       case GL_TEXTURE_ALPHA_TYPE_ARB:
 996          if (ctx->Extensions.ARB_texture_float) {
 997             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_ALPHA_SIZE) ?
 998                _mesa_get_format_datatype(texFormat) : GL_NONE;
 999          }
1000          else {
1001             _mesa_error(ctx, GL_INVALID_ENUM,
1002                         "glGetTexLevelParameter[if]v(pname)");
1003          }
1004          break;
1005       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1006          if (ctx->Extensions.ARB_texture_float) {
1007             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_LUMINANCE_SIZE) ?
1008                _mesa_get_format_datatype(texFormat) : GL_NONE;
1009          }
1010          else {
1011             _mesa_error(ctx, GL_INVALID_ENUM,
1012                         "glGetTexLevelParameter[if]v(pname)");
1013          }
1014          break;
1015       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1016          if (ctx->Extensions.ARB_texture_float) {
1017             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_INTENSITY_SIZE) ?
1018                _mesa_get_format_datatype(texFormat) : GL_NONE;
1019          }
1020          else {
1021             _mesa_error(ctx, GL_INVALID_ENUM,
1022                         "glGetTexLevelParameter[if]v(pname)");
1023          }
1024          break;
1025       case GL_TEXTURE_DEPTH_TYPE_ARB:
1026          if (ctx->Extensions.ARB_texture_float) {
1027             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_DEPTH_SIZE) ?
1028                _mesa_get_format_datatype(texFormat) : GL_NONE;
1029          }
1030          else {
1031             _mesa_error(ctx, GL_INVALID_ENUM,
1032                         "glGetTexLevelParameter[if]v(pname)");
1033          }
1034          break;
1035
1036       default:
1037          _mesa_error(ctx, GL_INVALID_ENUM,
1038                      "glGetTexLevelParameter[if]v(pname)");
1039    }
1040
1041  out:
1042    _mesa_unlock_texture(ctx, texObj);
1043 }
1044
1045
1046
1047 void GLAPIENTRY
1048 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
1049 {
1050    struct gl_texture_object *obj;
1051    GLboolean error = GL_FALSE;
1052    GET_CURRENT_CONTEXT(ctx);
1053    ASSERT_OUTSIDE_BEGIN_END(ctx);
1054
1055    obj = get_texobj(ctx, target, GL_TRUE);
1056    if (!obj)
1057       return;
1058
1059    _mesa_lock_texture(ctx, obj);
1060    switch (pname) {
1061       case GL_TEXTURE_MAG_FILTER:
1062          *params = ENUM_TO_FLOAT(obj->MagFilter);
1063          break;
1064       case GL_TEXTURE_MIN_FILTER:
1065          *params = ENUM_TO_FLOAT(obj->MinFilter);
1066          break;
1067       case GL_TEXTURE_WRAP_S:
1068          *params = ENUM_TO_FLOAT(obj->WrapS);
1069          break;
1070       case GL_TEXTURE_WRAP_T:
1071          *params = ENUM_TO_FLOAT(obj->WrapT);
1072          break;
1073       case GL_TEXTURE_WRAP_R:
1074          *params = ENUM_TO_FLOAT(obj->WrapR);
1075          break;
1076       case GL_TEXTURE_BORDER_COLOR:
1077          params[0] = CLAMP(obj->BorderColor.f[0], 0.0F, 1.0F);
1078          params[1] = CLAMP(obj->BorderColor.f[1], 0.0F, 1.0F);
1079          params[2] = CLAMP(obj->BorderColor.f[2], 0.0F, 1.0F);
1080          params[3] = CLAMP(obj->BorderColor.f[3], 0.0F, 1.0F);
1081          break;
1082       case GL_TEXTURE_RESIDENT:
1083          {
1084             GLboolean resident;
1085             if (ctx->Driver.IsTextureResident)
1086                resident = ctx->Driver.IsTextureResident(ctx, obj);
1087             else
1088                resident = GL_TRUE;
1089             *params = ENUM_TO_FLOAT(resident);
1090          }
1091          break;
1092       case GL_TEXTURE_PRIORITY:
1093          *params = obj->Priority;
1094          break;
1095       case GL_TEXTURE_MIN_LOD:
1096          *params = obj->MinLod;
1097          break;
1098       case GL_TEXTURE_MAX_LOD:
1099          *params = obj->MaxLod;
1100          break;
1101       case GL_TEXTURE_BASE_LEVEL:
1102          *params = (GLfloat) obj->BaseLevel;
1103          break;
1104       case GL_TEXTURE_MAX_LEVEL:
1105          *params = (GLfloat) obj->MaxLevel;
1106          break;
1107       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1108          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1109             *params = obj->MaxAnisotropy;
1110          }
1111          else
1112             error = GL_TRUE;
1113          break;
1114       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1115          if (ctx->Extensions.ARB_shadow_ambient) {
1116             *params = obj->CompareFailValue;
1117          }
1118          else
1119             error = GL_TRUE;
1120          break;
1121       case GL_GENERATE_MIPMAP_SGIS:
1122          *params = (GLfloat) obj->GenerateMipmap;
1123          break;
1124       case GL_TEXTURE_COMPARE_MODE_ARB:
1125          if (ctx->Extensions.ARB_shadow) {
1126             *params = (GLfloat) obj->CompareMode;
1127          }
1128          else
1129             error = GL_TRUE;
1130          break;
1131       case GL_TEXTURE_COMPARE_FUNC_ARB:
1132          if (ctx->Extensions.ARB_shadow) {
1133             *params = (GLfloat) obj->CompareFunc;
1134          }
1135          else
1136             error = GL_TRUE;
1137          break;
1138       case GL_DEPTH_TEXTURE_MODE_ARB:
1139          if (ctx->Extensions.ARB_depth_texture) {
1140             *params = (GLfloat) obj->DepthMode;
1141          }
1142          else
1143             error = GL_TRUE;
1144          break;
1145       case GL_TEXTURE_LOD_BIAS:
1146          if (ctx->Extensions.EXT_texture_lod_bias) {
1147             *params = obj->LodBias;
1148          }
1149          else
1150             error = GL_TRUE;
1151          break;
1152 #if FEATURE_OES_draw_texture
1153       case GL_TEXTURE_CROP_RECT_OES:
1154          params[0] = obj->CropRect[0];
1155          params[1] = obj->CropRect[1];
1156          params[2] = obj->CropRect[2];
1157          params[3] = obj->CropRect[3];
1158          break;
1159 #endif
1160
1161       case GL_TEXTURE_SWIZZLE_R_EXT:
1162       case GL_TEXTURE_SWIZZLE_G_EXT:
1163       case GL_TEXTURE_SWIZZLE_B_EXT:
1164       case GL_TEXTURE_SWIZZLE_A_EXT:
1165          if (ctx->Extensions.EXT_texture_swizzle) {
1166             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1167             *params = (GLfloat) obj->Swizzle[comp];
1168          }
1169          else {
1170             error = GL_TRUE;
1171          }
1172          break;
1173
1174       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1175          if (ctx->Extensions.EXT_texture_swizzle) {
1176             GLuint comp;
1177             for (comp = 0; comp < 4; comp++) {
1178                params[comp] = (GLfloat) obj->Swizzle[comp];
1179             }
1180          }
1181          else {
1182             error = GL_TRUE;
1183          }
1184          break;
1185
1186       default:
1187          error = GL_TRUE;
1188          break;
1189    }
1190
1191    if (error)
1192       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)",
1193                   pname);
1194
1195    _mesa_unlock_texture(ctx, obj);
1196 }
1197
1198
1199 void GLAPIENTRY
1200 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1201 {
1202    struct gl_texture_object *obj;
1203    GLboolean error = GL_FALSE;
1204    GET_CURRENT_CONTEXT(ctx);
1205    ASSERT_OUTSIDE_BEGIN_END(ctx);
1206
1207     obj = get_texobj(ctx, target, GL_TRUE);
1208     if (!obj)
1209        return;
1210
1211    _mesa_lock_texture(ctx, obj);
1212    switch (pname) {
1213       case GL_TEXTURE_MAG_FILTER:
1214          *params = (GLint) obj->MagFilter;
1215          break;;
1216       case GL_TEXTURE_MIN_FILTER:
1217          *params = (GLint) obj->MinFilter;
1218          break;;
1219       case GL_TEXTURE_WRAP_S:
1220          *params = (GLint) obj->WrapS;
1221          break;;
1222       case GL_TEXTURE_WRAP_T:
1223          *params = (GLint) obj->WrapT;
1224          break;;
1225       case GL_TEXTURE_WRAP_R:
1226          *params = (GLint) obj->WrapR;
1227          break;;
1228       case GL_TEXTURE_BORDER_COLOR:
1229          {
1230             GLfloat b[4];
1231             b[0] = CLAMP(obj->BorderColor.f[0], 0.0F, 1.0F);
1232             b[1] = CLAMP(obj->BorderColor.f[1], 0.0F, 1.0F);
1233             b[2] = CLAMP(obj->BorderColor.f[2], 0.0F, 1.0F);
1234             b[3] = CLAMP(obj->BorderColor.f[3], 0.0F, 1.0F);
1235             params[0] = FLOAT_TO_INT(b[0]);
1236             params[1] = FLOAT_TO_INT(b[1]);
1237             params[2] = FLOAT_TO_INT(b[2]);
1238             params[3] = FLOAT_TO_INT(b[3]);
1239          }
1240          break;;
1241       case GL_TEXTURE_RESIDENT:
1242          {
1243             GLboolean resident;
1244             if (ctx->Driver.IsTextureResident)
1245                resident = ctx->Driver.IsTextureResident(ctx, obj);
1246             else
1247                resident = GL_TRUE;
1248             *params = (GLint) resident;
1249          }
1250          break;;
1251       case GL_TEXTURE_PRIORITY:
1252          *params = FLOAT_TO_INT(obj->Priority);
1253          break;;
1254       case GL_TEXTURE_MIN_LOD:
1255          *params = (GLint) obj->MinLod;
1256          break;;
1257       case GL_TEXTURE_MAX_LOD:
1258          *params = (GLint) obj->MaxLod;
1259          break;;
1260       case GL_TEXTURE_BASE_LEVEL:
1261          *params = obj->BaseLevel;
1262          break;;
1263       case GL_TEXTURE_MAX_LEVEL:
1264          *params = obj->MaxLevel;
1265          break;;
1266       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1267          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1268             *params = (GLint) obj->MaxAnisotropy;
1269          }
1270          else {
1271             error = GL_TRUE;
1272          }
1273          break;
1274       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1275          if (ctx->Extensions.ARB_shadow_ambient) {
1276             *params = (GLint) FLOAT_TO_INT(obj->CompareFailValue);
1277          }
1278          else {
1279             error = GL_TRUE;
1280          }
1281          break;
1282       case GL_GENERATE_MIPMAP_SGIS:
1283          *params = (GLint) obj->GenerateMipmap;
1284          break;
1285       case GL_TEXTURE_COMPARE_MODE_ARB:
1286          if (ctx->Extensions.ARB_shadow) {
1287             *params = (GLint) obj->CompareMode;
1288          }
1289          else {
1290             error = GL_TRUE;
1291          }
1292          break;
1293       case GL_TEXTURE_COMPARE_FUNC_ARB:
1294          if (ctx->Extensions.ARB_shadow) {
1295             *params = (GLint) obj->CompareFunc;
1296          }
1297          else {
1298             error = GL_TRUE;
1299          }
1300          break;
1301       case GL_DEPTH_TEXTURE_MODE_ARB:
1302          if (ctx->Extensions.ARB_depth_texture) {
1303             *params = (GLint) obj->DepthMode;
1304          }
1305          else {
1306             error = GL_TRUE;
1307          }
1308          break;
1309       case GL_TEXTURE_LOD_BIAS:
1310          if (ctx->Extensions.EXT_texture_lod_bias) {
1311             *params = (GLint) obj->LodBias;
1312          }
1313          else {
1314             error = GL_TRUE;
1315          }
1316          break;
1317 #if FEATURE_OES_draw_texture
1318       case GL_TEXTURE_CROP_RECT_OES:
1319          params[0] = obj->CropRect[0];
1320          params[1] = obj->CropRect[1];
1321          params[2] = obj->CropRect[2];
1322          params[3] = obj->CropRect[3];
1323          break;
1324 #endif
1325       case GL_TEXTURE_SWIZZLE_R_EXT:
1326       case GL_TEXTURE_SWIZZLE_G_EXT:
1327       case GL_TEXTURE_SWIZZLE_B_EXT:
1328       case GL_TEXTURE_SWIZZLE_A_EXT:
1329          if (ctx->Extensions.EXT_texture_swizzle) {
1330             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1331             *params = obj->Swizzle[comp];
1332          }
1333          else {
1334             error = GL_TRUE;
1335          }
1336          break;
1337
1338       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1339          if (ctx->Extensions.EXT_texture_swizzle) {
1340             COPY_4V(params, obj->Swizzle);
1341          }
1342          else {
1343             error = GL_TRUE;
1344          }
1345          break;
1346
1347       default:
1348          ; /* silence warnings */
1349    }
1350
1351    if (error)
1352       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)",
1353                   pname);
1354
1355    _mesa_unlock_texture(ctx, obj);
1356 }
1357
1358
1359 /** New in GL 3.0 */
1360 void GLAPIENTRY
1361 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1362 {
1363    struct gl_texture_object *texObj;
1364    GET_CURRENT_CONTEXT(ctx);
1365    ASSERT_OUTSIDE_BEGIN_END(ctx);
1366
1367    texObj = get_texobj(ctx, target, GL_TRUE);
1368
1369    switch (pname) {
1370    case GL_TEXTURE_BORDER_COLOR:
1371       COPY_4V(params, texObj->BorderColor.i);
1372       break;
1373    default:
1374       _mesa_GetTexParameteriv(target, pname, params);
1375    }
1376 }
1377
1378
1379 /** New in GL 3.0 */
1380 void GLAPIENTRY
1381 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1382 {
1383    struct gl_texture_object *texObj;
1384    GET_CURRENT_CONTEXT(ctx);
1385    ASSERT_OUTSIDE_BEGIN_END(ctx);
1386
1387    texObj = get_texobj(ctx, target, GL_TRUE);
1388
1389    switch (pname) {
1390    case GL_TEXTURE_BORDER_COLOR:
1391       COPY_4V(params, texObj->BorderColor.i);
1392       break;
1393    default:
1394       {
1395          GLint ip[4];
1396          _mesa_GetTexParameteriv(target, pname, ip);
1397          params[0] = ip[0];
1398          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1399              pname == GL_TEXTURE_CROP_RECT_OES) {
1400             params[1] = ip[1];
1401             params[2] = ip[2];
1402             params[3] = ip[3];
1403          }
1404       }
1405    }
1406 }