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 #include <stdbool.h>
  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/glformats.h"
  39 #include "main/macros.h"
  40 #include "main/mfeatures.h"
  41 #include "main/mtypes.h"
  42 #include "main/state.h"
  43 #include "main/texcompress.h"
  44 #include "main/texobj.h"
  45 #include "main/texparam.h"
  46 #include "main/teximage.h"
  47 #include "main/texstate.h"
  48 #include "program/prog_instruction.h"
  49
  50
  51 /**
  52  * Check if a coordinate wrap mode is supported for the texture target.
  53  * \return GL_TRUE if legal, GL_FALSE otherwise
  54  */
  55 static GLboolean
  56 validate_texture_wrap_mode(struct gl_context * ctx, GLenum target, GLenum wrap)
  57 {
  58    const struct gl_extensions * const e = & ctx->Extensions;
  59    const bool is_desktop_gl = _mesa_is_desktop_gl(ctx);
  60    bool supported;
  61
  62    switch (wrap) {
  63    case GL_CLAMP:
  64       /* GL_CLAMP was removed in the core profile, and it has never existed in
  65        * OpenGL ES.
  66        */
  67       supported = (ctx->API == API_OPENGL_COMPAT)
  68          && (target != GL_TEXTURE_EXTERNAL_OES);
  69       break;
  70
  71    case GL_CLAMP_TO_EDGE:
  72       supported = true;
  73       break;
  74
  75    case GL_CLAMP_TO_BORDER:
  76       supported = is_desktop_gl && e->ARB_texture_border_clamp
  77          && (target != GL_TEXTURE_EXTERNAL_OES);
  78       break;
  79
  80    case GL_REPEAT:
  81    case GL_MIRRORED_REPEAT:
  82       supported = (target != GL_TEXTURE_RECTANGLE_NV)
  83          && (target != GL_TEXTURE_EXTERNAL_OES);
  84       break;
  85
  86    case GL_MIRROR_CLAMP_EXT:
  87    case GL_MIRROR_CLAMP_TO_EDGE_EXT:
  88       supported = is_desktop_gl
  89          && (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)
  90          && (target != GL_TEXTURE_RECTANGLE_NV)
  91          && (target != GL_TEXTURE_EXTERNAL_OES);
  92       break;
  93
  94    case GL_MIRROR_CLAMP_TO_BORDER_EXT:
  95       supported = is_desktop_gl && e->EXT_texture_mirror_clamp
  96          && (target != GL_TEXTURE_RECTANGLE_NV)
  97          && (target != GL_TEXTURE_EXTERNAL_OES);
  98       break;
  99
 100    default:
 101       supported = false;
 102       break;
 103    }
 104
 105    if (!supported)
 106       _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)", wrap );
 107
 108    return supported;
 109 }
 110
 111
 112 /**
 113  * Get current texture object for given target.
 114  * Return NULL if any error (and record the error).
 115  * Note that this is different from _mesa_select_tex_object() in that proxy
 116  * targets are not accepted.
 117  * Only the glGetTexLevelParameter() functions accept proxy targets.
 118  */
 119 static struct gl_texture_object *
 120 get_texobj(struct gl_context *ctx, GLenum target, GLboolean get)
 121 {
 122    struct gl_texture_unit *texUnit;
 123
 124    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
 125       _mesa_error(ctx, GL_INVALID_OPERATION,
 126                   "gl%sTexParameter(current unit)", get ? "Get" : "");
 127       return NULL;
 128    }
 129
 130    texUnit = _mesa_get_current_tex_unit(ctx);
 131
 132    switch (target) {
 133    case GL_TEXTURE_1D:
 134       if (_mesa_is_desktop_gl(ctx))
 135          return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 136       break;
 137    case GL_TEXTURE_2D:
 138       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 139    case GL_TEXTURE_3D:
 140       if (ctx->API != API_OPENGLES)
 141          return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 142       break;
 143    case GL_TEXTURE_CUBE_MAP:
 144       if (ctx->Extensions.ARB_texture_cube_map) {
 145          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 146       }
 147       break;
 148    case GL_TEXTURE_RECTANGLE_NV:
 149       if (_mesa_is_desktop_gl(ctx)
 150           && ctx->Extensions.NV_texture_rectangle) {
 151          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 152       }
 153       break;
 154    case GL_TEXTURE_1D_ARRAY_EXT:
 155       if (_mesa_is_desktop_gl(ctx)
 156           && (ctx->Extensions.MESA_texture_array ||
 157               ctx->Extensions.EXT_texture_array)) {
 158          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 159       }
 160       break;
 161    case GL_TEXTURE_2D_ARRAY_EXT:
 162       if ((_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx))
 163           && (ctx->Extensions.MESA_texture_array ||
 164               ctx->Extensions.EXT_texture_array)) {
 165          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 166       }
 167       break;
 168    case GL_TEXTURE_EXTERNAL_OES:
 169       if (_mesa_is_gles(ctx) && ctx->Extensions.OES_EGL_image_external) {
 170          return texUnit->CurrentTex[TEXTURE_EXTERNAL_INDEX];
 171       }
 172       break;
 173    case GL_TEXTURE_CUBE_MAP_ARRAY:
 174       if (ctx->Extensions.ARB_texture_cube_map_array) {
 175          return texUnit->CurrentTex[TEXTURE_CUBE_ARRAY_INDEX];
 176       }
 177       break;
 178    default:
 179       ;
 180    }
 181
 182    _mesa_error(ctx, GL_INVALID_ENUM,
 183                   "gl%sTexParameter(target)", get ? "Get" : "");
 184    return NULL;
 185 }
 186
 187
 188 /**
 189  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 190  * \return -1 if error.
 191  */
 192 static GLint
 193 comp_to_swizzle(GLenum comp)
 194 {
 195    switch (comp) {
 196    case GL_RED:
 197       return SWIZZLE_X;
 198    case GL_GREEN:
 199       return SWIZZLE_Y;
 200    case GL_BLUE:
 201       return SWIZZLE_Z;
 202    case GL_ALPHA:
 203       return SWIZZLE_W;
 204    case GL_ZERO:
 205       return SWIZZLE_ZERO;
 206    case GL_ONE:
 207       return SWIZZLE_ONE;
 208    default:
 209       return -1;
 210    }
 211 }
 212
 213
 214 static void
 215 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 216 {
 217    ASSERT(comp < 4);
 218    ASSERT(swz <= SWIZZLE_NIL);
 219    {
 220       GLuint mask = 0x7 << (3 * comp);
 221       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 222       *swizzle = s;
 223    }
 224 }
 225
 226
 227 /**
 228  * This is called just prior to changing any texture object state which
 229  * will not effect texture completeness.
 230  */
 231 static inline void
 232 flush(struct gl_context *ctx)
 233 {
 234    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 235 }
 236
 237
 238 /**
 239  * This is called just prior to changing any texture object state which
 240  * can effect texture completeness (texture base level, max level).
 241  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 242  * state flag and then mark the texture object as 'incomplete' so that any
 243  * per-texture derived state gets recomputed.
 244  */
 245 static inline void
 246 incomplete(struct gl_context *ctx, struct gl_texture_object *texObj)
 247 {
 248    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 249    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
 250 }
 251
 252
 253 /**
 254  * Set an integer-valued texture parameter
 255  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 256  */
 257 static GLboolean
 258 set_tex_parameteri(struct gl_context *ctx,
 259                    struct gl_texture_object *texObj,
 260                    GLenum pname, const GLint *params)
 261 {
 262    switch (pname) {
 263    case GL_TEXTURE_MIN_FILTER:
 264       if (texObj->Sampler.MinFilter == params[0])
 265          return GL_FALSE;
 266       switch (params[0]) {
 267       case GL_NEAREST:
 268       case GL_LINEAR:
 269          flush(ctx);
 270          texObj->Sampler.MinFilter = params[0];
 271          return GL_TRUE;
 272       case GL_NEAREST_MIPMAP_NEAREST:
 273       case GL_LINEAR_MIPMAP_NEAREST:
 274       case GL_NEAREST_MIPMAP_LINEAR:
 275       case GL_LINEAR_MIPMAP_LINEAR:
 276          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV &&
 277              texObj->Target != GL_TEXTURE_EXTERNAL_OES) {
 278             flush(ctx);
 279             texObj->Sampler.MinFilter = params[0];
 280             return GL_TRUE;
 281          }
 282          /* fall-through */
 283       default:
 284          goto invalid_param;
 285       }
 286       return GL_FALSE;
 287
 288    case GL_TEXTURE_MAG_FILTER:
 289       if (texObj->Sampler.MagFilter == params[0])
 290          return GL_FALSE;
 291       switch (params[0]) {
 292       case GL_NEAREST:
 293       case GL_LINEAR:
 294          flush(ctx); /* does not effect completeness */
 295          texObj->Sampler.MagFilter = params[0];
 296          return GL_TRUE;
 297       default:
 298          goto invalid_param;
 299       }
 300       return GL_FALSE;
 301
 302    case GL_TEXTURE_WRAP_S:
 303       if (texObj->Sampler.WrapS == params[0])
 304          return GL_FALSE;
 305       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 306          flush(ctx);
 307          texObj->Sampler.WrapS = params[0];
 308          return GL_TRUE;
 309       }
 310       return GL_FALSE;
 311
 312    case GL_TEXTURE_WRAP_T:
 313       if (texObj->Sampler.WrapT == params[0])
 314          return GL_FALSE;
 315       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 316          flush(ctx);
 317          texObj->Sampler.WrapT = params[0];
 318          return GL_TRUE;
 319       }
 320       return GL_FALSE;
 321
 322    case GL_TEXTURE_WRAP_R:
 323       if (texObj->Sampler.WrapR == params[0])
 324          return GL_FALSE;
 325       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 326          flush(ctx);
 327          texObj->Sampler.WrapR = params[0];
 328          return GL_TRUE;
 329       }
 330       return GL_FALSE;
 331
 332    case GL_TEXTURE_BASE_LEVEL:
 333       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 334          goto invalid_pname;
 335
 336       if (texObj->BaseLevel == params[0])
 337          return GL_FALSE;
 338       if (params[0] < 0 ||
 339           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 340          _mesa_error(ctx, GL_INVALID_VALUE,
 341                      "glTexParameter(param=%d)", params[0]);
 342          return GL_FALSE;
 343       }
 344       incomplete(ctx, texObj);
 345       texObj->BaseLevel = params[0];
 346       return GL_TRUE;
 347
 348    case GL_TEXTURE_MAX_LEVEL:
 349       if (texObj->MaxLevel == params[0])
 350          return GL_FALSE;
 351       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 352          _mesa_error(ctx, GL_INVALID_VALUE,
 353                      "glTexParameter(param=%d)", params[0]);
 354          return GL_FALSE;
 355       }
 356       incomplete(ctx, texObj);
 357       texObj->MaxLevel = params[0];
 358       return GL_TRUE;
 359
 360    case GL_GENERATE_MIPMAP_SGIS:
 361       if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 362          goto invalid_pname;
 363
 364       if (params[0] && texObj->Target == GL_TEXTURE_EXTERNAL_OES)
 365          goto invalid_param;
 366       if (texObj->GenerateMipmap != params[0]) {
 367          /* no flush() */
 368          texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 369          return GL_TRUE;
 370       }
 371       return GL_FALSE;
 372
 373    case GL_TEXTURE_COMPARE_MODE_ARB:
 374       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 375           || _mesa_is_gles3(ctx)) {
 376          if (texObj->Sampler.CompareMode == params[0])
 377             return GL_FALSE;
 378          if (params[0] == GL_NONE ||
 379              params[0] == GL_COMPARE_R_TO_TEXTURE_ARB) {
 380             flush(ctx);
 381             texObj->Sampler.CompareMode = params[0];
 382             return GL_TRUE;
 383          }
 384          goto invalid_param;
 385       }
 386       goto invalid_pname;
 387
 388    case GL_TEXTURE_COMPARE_FUNC_ARB:
 389       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_shadow)
 390           || _mesa_is_gles3(ctx)) {
 391          if (texObj->Sampler.CompareFunc == params[0])
 392             return GL_FALSE;
 393          switch (params[0]) {
 394          case GL_LEQUAL:
 395          case GL_GEQUAL:
 396             flush(ctx);
 397             texObj->Sampler.CompareFunc = params[0];
 398             return GL_TRUE;
 399          case GL_EQUAL:
 400          case GL_NOTEQUAL:
 401          case GL_LESS:
 402          case GL_GREATER:
 403          case GL_ALWAYS:
 404          case GL_NEVER:
 405             if (ctx->Extensions.EXT_shadow_funcs) {
 406                flush(ctx);
 407                texObj->Sampler.CompareFunc = params[0];
 408                return GL_TRUE;
 409             }
 410             /* fall-through */
 411          default:
 412             goto invalid_param;
 413          }
 414       }
 415       goto invalid_pname;
 416
 417    case GL_DEPTH_TEXTURE_MODE_ARB:
 418       /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has never
 419        * existed in OpenGL ES.
 420        */
 421       if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.ARB_depth_texture) {
 422          if (texObj->DepthMode == params[0])
 423             return GL_FALSE;
 424          if (params[0] == GL_LUMINANCE ||
 425              params[0] == GL_INTENSITY ||
 426              params[0] == GL_ALPHA ||
 427              (ctx->Extensions.ARB_texture_rg && params[0] == GL_RED)) {
 428             flush(ctx);
 429             texObj->DepthMode = params[0];
 430             return GL_TRUE;
 431          }
 432          goto invalid_param;
 433       }
 434       goto invalid_pname;
 435
 436    case GL_TEXTURE_CROP_RECT_OES:
 437       if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
 438          goto invalid_pname;
 439
 440       texObj->CropRect[0] = params[0];
 441       texObj->CropRect[1] = params[1];
 442       texObj->CropRect[2] = params[2];
 443       texObj->CropRect[3] = params[3];
 444       return GL_TRUE;
 445
 446    case GL_TEXTURE_SWIZZLE_R_EXT:
 447    case GL_TEXTURE_SWIZZLE_G_EXT:
 448    case GL_TEXTURE_SWIZZLE_B_EXT:
 449    case GL_TEXTURE_SWIZZLE_A_EXT:
 450       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 451           || _mesa_is_gles3(ctx)) {
 452          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 453          const GLint swz = comp_to_swizzle(params[0]);
 454          if (swz < 0) {
 455             _mesa_error(ctx, GL_INVALID_OPERATION,
 456                         "glTexParameter(swizzle 0x%x)", params[0]);
 457             return GL_FALSE;
 458          }
 459          ASSERT(comp < 4);
 460
 461          flush(ctx);
 462          texObj->Swizzle[comp] = params[0];
 463          set_swizzle_component(&texObj->_Swizzle, comp, swz);
 464          return GL_TRUE;
 465       }
 466       goto invalid_pname;
 467
 468    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 469       if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_texture_swizzle)
 470           || _mesa_is_gles3(ctx)) {
 471          GLuint comp;
 472          flush(ctx);
 473          for (comp = 0; comp < 4; comp++) {
 474             const GLint swz = comp_to_swizzle(params[comp]);
 475             if (swz >= 0) {
 476                texObj->Swizzle[comp] = params[comp];
 477                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 478             }
 479             else {
 480                _mesa_error(ctx, GL_INVALID_OPERATION,
 481                            "glTexParameter(swizzle 0x%x)", params[comp]);
 482                return GL_FALSE;
 483             }
 484          }
 485          return GL_TRUE;
 486       }
 487       goto invalid_pname;
 488
 489    case GL_TEXTURE_SRGB_DECODE_EXT:
 490       if (_mesa_is_desktop_gl(ctx)
 491           && ctx->Extensions.EXT_texture_sRGB_decode) {
 492          GLenum decode = params[0];
 493          if (decode == GL_DECODE_EXT || decode == GL_SKIP_DECODE_EXT) {
 494             if (texObj->Sampler.sRGBDecode != decode) {
 495                flush(ctx);
 496                texObj->Sampler.sRGBDecode = decode;
 497             }
 498             return GL_TRUE;
 499          }
 500       }
 501       goto invalid_pname;
 502
 503    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 504       if (_mesa_is_desktop_gl(ctx)
 505           && ctx->Extensions.AMD_seamless_cubemap_per_texture) {
 506          GLenum param = params[0];
 507          if (param != GL_TRUE && param != GL_FALSE) {
 508             goto invalid_param;
 509          }
 510          if (param != texObj->Sampler.CubeMapSeamless) {
 511             flush(ctx);
 512             texObj->Sampler.CubeMapSeamless = param;
 513          }
 514          return GL_TRUE;
 515       }
 516       goto invalid_pname;
 517
 518    default:
 519       goto invalid_pname;
 520    }
 521
 522 invalid_pname:
 523    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 524                _mesa_lookup_enum_by_nr(pname));
 525    return GL_FALSE;
 526
 527 invalid_param:
 528    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param=%s)",
 529                _mesa_lookup_enum_by_nr(params[0]));
 530    return GL_FALSE;
 531 }
 532
 533
 534 /**
 535  * Set a float-valued texture parameter
 536  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 537  */
 538 static GLboolean
 539 set_tex_parameterf(struct gl_context *ctx,
 540                    struct gl_texture_object *texObj,
 541                    GLenum pname, const GLfloat *params)
 542 {
 543    switch (pname) {
 544    case GL_TEXTURE_MIN_LOD:
 545       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 546          goto invalid_pname;
 547
 548       if (texObj->Sampler.MinLod == params[0])
 549          return GL_FALSE;
 550       flush(ctx);
 551       texObj->Sampler.MinLod = params[0];
 552       return GL_TRUE;
 553
 554    case GL_TEXTURE_MAX_LOD:
 555       if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
 556          goto invalid_pname;
 557
 558       if (texObj->Sampler.MaxLod == params[0])
 559          return GL_FALSE;
 560       flush(ctx);
 561       texObj->Sampler.MaxLod = params[0];
 562       return GL_TRUE;
 563
 564    case GL_TEXTURE_PRIORITY:
 565       if (ctx->API != API_OPENGL_COMPAT)
 566          goto invalid_pname;
 567
 568       flush(ctx);
 569       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 570       return GL_TRUE;
 571
 572    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 573       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 574          if (texObj->Sampler.MaxAnisotropy == params[0])
 575             return GL_FALSE;
 576          if (params[0] < 1.0) {
 577             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 578             return GL_FALSE;
 579          }
 580          flush(ctx);
 581          /* clamp to max, that's what NVIDIA does */
 582          texObj->Sampler.MaxAnisotropy = MIN2(params[0],
 583                                       ctx->Const.MaxTextureMaxAnisotropy);
 584          return GL_TRUE;
 585       }
 586       else {
 587          static GLuint count = 0;
 588          if (count++ < 10)
 589             goto invalid_pname;
 590       }
 591       return GL_FALSE;
 592
 593    case GL_TEXTURE_LOD_BIAS:
 594       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias.
 595        * It was removed in core-profile, and it has never existed in OpenGL
 596        * ES.
 597        */
 598       if (ctx->API != API_OPENGL_COMPAT)
 599          goto invalid_pname;
 600
 601       if (texObj->Sampler.LodBias != params[0]) {
 602          flush(ctx);
 603          texObj->Sampler.LodBias = params[0];
 604          return GL_TRUE;
 605       }
 606       break;
 607
 608    case GL_TEXTURE_BORDER_COLOR:
 609       if (!_mesa_is_desktop_gl(ctx))
 610          goto invalid_pname;
 611
 612       flush(ctx);
 613       /* ARB_texture_float disables clamping */
 614       if (ctx->Extensions.ARB_texture_float) {
 615          texObj->Sampler.BorderColor.f[RCOMP] = params[0];
 616          texObj->Sampler.BorderColor.f[GCOMP] = params[1];
 617          texObj->Sampler.BorderColor.f[BCOMP] = params[2];
 618          texObj->Sampler.BorderColor.f[ACOMP] = params[3];
 619       } else {
 620          texObj->Sampler.BorderColor.f[RCOMP] = CLAMP(params[0], 0.0F, 1.0F);
 621          texObj->Sampler.BorderColor.f[GCOMP] = CLAMP(params[1], 0.0F, 1.0F);
 622          texObj->Sampler.BorderColor.f[BCOMP] = CLAMP(params[2], 0.0F, 1.0F);
 623          texObj->Sampler.BorderColor.f[ACOMP] = CLAMP(params[3], 0.0F, 1.0F);
 624       }
 625       return GL_TRUE;
 626
 627    default:
 628       goto invalid_pname;
 629    }
 630    return GL_FALSE;
 631
 632 invalid_pname:
 633    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 634                _mesa_lookup_enum_by_nr(pname));
 635    return GL_FALSE;
 636 }
 637
 638
 639 void GLAPIENTRY
 640 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 641 {
 642    GLboolean need_update;
 643    struct gl_texture_object *texObj;
 644    GET_CURRENT_CONTEXT(ctx);
 645
 646    texObj = get_texobj(ctx, target, GL_FALSE);
 647    if (!texObj)
 648       return;
 649
 650    switch (pname) {
 651    case GL_TEXTURE_MIN_FILTER:
 652    case GL_TEXTURE_MAG_FILTER:
 653    case GL_TEXTURE_WRAP_S:
 654    case GL_TEXTURE_WRAP_T:
 655    case GL_TEXTURE_WRAP_R:
 656    case GL_TEXTURE_BASE_LEVEL:
 657    case GL_TEXTURE_MAX_LEVEL:
 658    case GL_GENERATE_MIPMAP_SGIS:
 659    case GL_TEXTURE_COMPARE_MODE_ARB:
 660    case GL_TEXTURE_COMPARE_FUNC_ARB:
 661    case GL_DEPTH_TEXTURE_MODE_ARB:
 662    case GL_TEXTURE_SRGB_DECODE_EXT:
 663    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 664    case GL_TEXTURE_SWIZZLE_R_EXT:
 665    case GL_TEXTURE_SWIZZLE_G_EXT:
 666    case GL_TEXTURE_SWIZZLE_B_EXT:
 667    case GL_TEXTURE_SWIZZLE_A_EXT:
 668       {
 669          GLint p[4];
 670          p[0] = (param > 0) ?
 671                 ((param > INT_MAX) ? INT_MAX : (GLint) (param + 0.5)) :
 672                 ((param < INT_MIN) ? INT_MIN : (GLint) (param - 0.5));
 673
 674          p[1] = p[2] = p[3] = 0;
 675          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 676       }
 677       break;
 678    default:
 679       {
 680          /* this will generate an error if pname is illegal */
 681          GLfloat p[4];
 682          p[0] = param;
 683          p[1] = p[2] = p[3] = 0.0F;
 684          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 685       }
 686    }
 687
 688    if (ctx->Driver.TexParameter && need_update) {
 689       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 690    }
 691 }
 692
 693
 694 void GLAPIENTRY
 695 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 696 {
 697    GLboolean need_update;
 698    struct gl_texture_object *texObj;
 699    GET_CURRENT_CONTEXT(ctx);
 700
 701    texObj = get_texobj(ctx, target, GL_FALSE);
 702    if (!texObj)
 703       return;
 704
 705    switch (pname) {
 706    case GL_TEXTURE_MIN_FILTER:
 707    case GL_TEXTURE_MAG_FILTER:
 708    case GL_TEXTURE_WRAP_S:
 709    case GL_TEXTURE_WRAP_T:
 710    case GL_TEXTURE_WRAP_R:
 711    case GL_TEXTURE_BASE_LEVEL:
 712    case GL_TEXTURE_MAX_LEVEL:
 713    case GL_GENERATE_MIPMAP_SGIS:
 714    case GL_TEXTURE_COMPARE_MODE_ARB:
 715    case GL_TEXTURE_COMPARE_FUNC_ARB:
 716    case GL_DEPTH_TEXTURE_MODE_ARB:
 717    case GL_TEXTURE_SRGB_DECODE_EXT:
 718    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 719       {
 720          /* convert float param to int */
 721          GLint p[4];
 722          p[0] = (GLint) params[0];
 723          p[1] = p[2] = p[3] = 0;
 724          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 725       }
 726       break;
 727    case GL_TEXTURE_CROP_RECT_OES:
 728       {
 729          /* convert float params to int */
 730          GLint iparams[4];
 731          iparams[0] = (GLint) params[0];
 732          iparams[1] = (GLint) params[1];
 733          iparams[2] = (GLint) params[2];
 734          iparams[3] = (GLint) params[3];
 735          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 736       }
 737       break;
 738    case GL_TEXTURE_SWIZZLE_R_EXT:
 739    case GL_TEXTURE_SWIZZLE_G_EXT:
 740    case GL_TEXTURE_SWIZZLE_B_EXT:
 741    case GL_TEXTURE_SWIZZLE_A_EXT:
 742    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 743       {
 744          GLint p[4] = {0, 0, 0, 0};
 745          p[0] = (GLint) params[0];
 746          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT) {
 747             p[1] = (GLint) params[1];
 748             p[2] = (GLint) params[2];
 749             p[3] = (GLint) params[3];
 750          }
 751          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 752       }
 753       break;
 754    default:
 755       /* this will generate an error if pname is illegal */
 756       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 757    }
 758
 759    if (ctx->Driver.TexParameter && need_update) {
 760       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 761    }
 762 }
 763
 764
 765 void GLAPIENTRY
 766 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 767 {
 768    GLboolean need_update;
 769    struct gl_texture_object *texObj;
 770    GET_CURRENT_CONTEXT(ctx);
 771
 772    texObj = get_texobj(ctx, target, GL_FALSE);
 773    if (!texObj)
 774       return;
 775
 776    switch (pname) {
 777    case GL_TEXTURE_MIN_LOD:
 778    case GL_TEXTURE_MAX_LOD:
 779    case GL_TEXTURE_PRIORITY:
 780    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 781    case GL_TEXTURE_LOD_BIAS:
 782    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 783       {
 784          GLfloat fparam[4];
 785          fparam[0] = (GLfloat) param;
 786          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 787          /* convert int param to float */
 788          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 789       }
 790       break;
 791    default:
 792       /* this will generate an error if pname is illegal */
 793       {
 794          GLint iparam[4];
 795          iparam[0] = param;
 796          iparam[1] = iparam[2] = iparam[3] = 0;
 797          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 798       }
 799    }
 800
 801    if (ctx->Driver.TexParameter && need_update) {
 802       GLfloat fparam = (GLfloat) param;
 803       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 804    }
 805 }
 806
 807
 808 void GLAPIENTRY
 809 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 810 {
 811    GLboolean need_update;
 812    struct gl_texture_object *texObj;
 813    GET_CURRENT_CONTEXT(ctx);
 814
 815    texObj = get_texobj(ctx, target, GL_FALSE);
 816    if (!texObj)
 817       return;
 818
 819    switch (pname) {
 820    case GL_TEXTURE_BORDER_COLOR:
 821       {
 822          /* convert int params to float */
 823          GLfloat fparams[4];
 824          fparams[0] = INT_TO_FLOAT(params[0]);
 825          fparams[1] = INT_TO_FLOAT(params[1]);
 826          fparams[2] = INT_TO_FLOAT(params[2]);
 827          fparams[3] = INT_TO_FLOAT(params[3]);
 828          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 829       }
 830       break;
 831    case GL_TEXTURE_MIN_LOD:
 832    case GL_TEXTURE_MAX_LOD:
 833    case GL_TEXTURE_PRIORITY:
 834    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 835    case GL_TEXTURE_LOD_BIAS:
 836    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 837       {
 838          /* convert int param to float */
 839          GLfloat fparams[4];
 840          fparams[0] = (GLfloat) params[0];
 841          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 842          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 843       }
 844       break;
 845    default:
 846       /* this will generate an error if pname is illegal */
 847       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 848    }
 849
 850    if (ctx->Driver.TexParameter && need_update) {
 851       GLfloat fparams[4];
 852       fparams[0] = INT_TO_FLOAT(params[0]);
 853       if (pname == GL_TEXTURE_BORDER_COLOR ||
 854           pname == GL_TEXTURE_CROP_RECT_OES) {
 855          fparams[1] = INT_TO_FLOAT(params[1]);
 856          fparams[2] = INT_TO_FLOAT(params[2]);
 857          fparams[3] = INT_TO_FLOAT(params[3]);
 858       }
 859       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 860    }
 861 }
 862
 863
 864 /**
 865  * Set tex parameter to integer value(s).  Primarily intended to set
 866  * integer-valued texture border color (for integer-valued textures).
 867  * New in GL 3.0.
 868  */
 869 void GLAPIENTRY
 870 _mesa_TexParameterIiv(GLenum target, GLenum pname, const GLint *params)
 871 {
 872    struct gl_texture_object *texObj;
 873    GET_CURRENT_CONTEXT(ctx);
 874
 875    texObj = get_texobj(ctx, target, GL_FALSE);
 876    if (!texObj)
 877       return;
 878
 879    switch (pname) {
 880    case GL_TEXTURE_BORDER_COLOR:
 881       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 882       /* set the integer-valued border color */
 883       COPY_4V(texObj->Sampler.BorderColor.i, params);
 884       break;
 885    default:
 886       _mesa_TexParameteriv(target, pname, params);
 887       break;
 888    }
 889    /* XXX no driver hook for TexParameterIiv() yet */
 890 }
 891
 892
 893 /**
 894  * Set tex parameter to unsigned integer value(s).  Primarily intended to set
 895  * uint-valued texture border color (for integer-valued textures).
 896  * New in GL 3.0
 897  */
 898 void GLAPIENTRY
 899 _mesa_TexParameterIuiv(GLenum target, GLenum pname, const GLuint *params)
 900 {
 901    struct gl_texture_object *texObj;
 902    GET_CURRENT_CONTEXT(ctx);
 903
 904    texObj = get_texobj(ctx, target, GL_FALSE);
 905    if (!texObj)
 906       return;
 907
 908    switch (pname) {
 909    case GL_TEXTURE_BORDER_COLOR:
 910       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 911       /* set the unsigned integer-valued border color */
 912       COPY_4V(texObj->Sampler.BorderColor.ui, params);
 913       break;
 914    default:
 915       _mesa_TexParameteriv(target, pname, (const GLint *) params);
 916       break;
 917    }
 918    /* XXX no driver hook for TexParameterIuiv() yet */
 919 }
 920
 921
 922 static GLboolean
 923 legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target)
 924 {
 925    switch (target) {
 926    case GL_TEXTURE_1D:
 927    case GL_PROXY_TEXTURE_1D:
 928    case GL_TEXTURE_2D:
 929    case GL_PROXY_TEXTURE_2D:
 930    case GL_TEXTURE_3D:
 931    case GL_PROXY_TEXTURE_3D:
 932       return GL_TRUE;
 933    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
 934    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
 935    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
 936    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
 937    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
 938    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
 939    case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
 940       return ctx->Extensions.ARB_texture_cube_map;
 941    case GL_TEXTURE_RECTANGLE_NV:
 942    case GL_PROXY_TEXTURE_RECTANGLE_NV:
 943       return ctx->Extensions.NV_texture_rectangle;
 944    case GL_TEXTURE_1D_ARRAY_EXT:
 945    case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
 946    case GL_TEXTURE_2D_ARRAY_EXT:
 947    case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
 948       return (ctx->Extensions.MESA_texture_array ||
 949               ctx->Extensions.EXT_texture_array);
 950    case GL_TEXTURE_BUFFER:
 951       /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
 952        * but not in earlier versions that expose ARB_texture_buffer_object.
 953        *
 954        * From the ARB_texture_buffer_object spec:
 955        * "(7) Do buffer textures support texture parameters (TexParameter) or
 956        *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
 957        *
 958        *    RESOLVED:  No. [...] Note that the spec edits above don't add
 959        *    explicit error language for any of these cases.  That is because
 960        *    each of the functions enumerate the set of valid <target>
 961        *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
 962        *    these cases means that target is not legal, and an INVALID_ENUM
 963        *    error should be generated."
 964        *
 965        * From the OpenGL 3.1 spec:
 966        * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
 967        */
 968       return ctx->API == API_OPENGL_CORE && ctx->Version >= 31;
 969    case GL_TEXTURE_2D_MULTISAMPLE:
 970    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 971       return ctx->Extensions.ARB_texture_multisample;
 972    default:
 973       return GL_FALSE;
 974    }
 975 }
 976
 977
 978 static void
 979 get_tex_level_parameter_image(struct gl_context *ctx,
 980                               const struct gl_texture_object *texObj,
 981                               GLenum target, GLint level,
 982                               GLenum pname, GLint *params)
 983 {
 984    const struct gl_texture_image *img = NULL;
 985    gl_format texFormat;
 986
 987    img = _mesa_select_tex_image(ctx, texObj, target, level);
 988    if (!img || img->TexFormat == MESA_FORMAT_NONE) {
 989       /* undefined texture image */
 990       if (pname == GL_TEXTURE_COMPONENTS)
 991          *params = 1;
 992       else
 993          *params = 0;
 994       return;
 995    }
 996
 997    texFormat = img->TexFormat;
 998
 999    switch (pname) {
1000       case GL_TEXTURE_WIDTH:
1001          *params = img->Width;
1002          break;
1003       case GL_TEXTURE_HEIGHT:
1004          *params = img->Height;
1005          break;
1006       case GL_TEXTURE_DEPTH:
1007          *params = img->Depth;
1008          break;
1009       case GL_TEXTURE_INTERNAL_FORMAT:
1010          if (_mesa_is_format_compressed(texFormat)) {
1011             /* need to return the actual compressed format */
1012             *params = _mesa_compressed_format_to_glenum(ctx, texFormat);
1013          }
1014          else {
1015             /* If the true internal format is not compressed but the user
1016              * requested a generic compressed format, we have to return the
1017              * generic base format that matches.
1018              *
1019              * From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
1020              *
1021              *     "If no specific compressed format is available,
1022              *     internalformat is instead replaced by the corresponding base
1023              *     internal format."
1024              *
1025              * Otherwise just return the user's requested internal format
1026              */
1027             const GLenum f =
1028                _mesa_gl_compressed_format_base_format(img->InternalFormat);
1029
1030             *params = (f != 0) ? f : img->InternalFormat;
1031          }
1032          break;
1033       case GL_TEXTURE_BORDER:
1034          *params = img->Border;
1035          break;
1036       case GL_TEXTURE_RED_SIZE:
1037       case GL_TEXTURE_GREEN_SIZE:
1038       case GL_TEXTURE_BLUE_SIZE:
1039       case GL_TEXTURE_ALPHA_SIZE:
1040          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1041             *params = _mesa_get_format_bits(texFormat, pname);
1042          else
1043             *params = 0;
1044          break;
1045       case GL_TEXTURE_INTENSITY_SIZE:
1046       case GL_TEXTURE_LUMINANCE_SIZE:
1047          if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
1048             *params = _mesa_get_format_bits(texFormat, pname);
1049             if (*params == 0) {
1050                /* intensity or luminance is probably stored as RGB[A] */
1051                *params = MIN2(_mesa_get_format_bits(texFormat,
1052                                                     GL_TEXTURE_RED_SIZE),
1053                               _mesa_get_format_bits(texFormat,
1054                                                     GL_TEXTURE_GREEN_SIZE));
1055             }
1056          }
1057          else {
1058             *params = 0;
1059          }
1060          break;
1061       case GL_TEXTURE_DEPTH_SIZE_ARB:
1062          if (!ctx->Extensions.ARB_depth_texture)
1063             goto invalid_pname;
1064          *params = _mesa_get_format_bits(texFormat, pname);
1065          break;
1066       case GL_TEXTURE_STENCIL_SIZE_EXT:
1067          if (!ctx->Extensions.EXT_packed_depth_stencil &&
1068              !ctx->Extensions.ARB_framebuffer_object)
1069             goto invalid_pname;
1070          *params = _mesa_get_format_bits(texFormat, pname);
1071          break;
1072       case GL_TEXTURE_SHARED_SIZE:
1073          if (ctx->Version < 30 &&
1074              !ctx->Extensions.EXT_texture_shared_exponent)
1075             goto invalid_pname;
1076          *params = texFormat == MESA_FORMAT_RGB9_E5_FLOAT ? 5 : 0;
1077          break;
1078
1079       /* GL_ARB_texture_compression */
1080       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1081          if (_mesa_is_format_compressed(texFormat) &&
1082              !_mesa_is_proxy_texture(target)) {
1083             *params = _mesa_format_image_size(texFormat, img->Width,
1084                                               img->Height, img->Depth);
1085          }
1086          else {
1087             _mesa_error(ctx, GL_INVALID_OPERATION,
1088                         "glGetTexLevelParameter[if]v(pname)");
1089          }
1090          break;
1091       case GL_TEXTURE_COMPRESSED:
1092          *params = (GLint) _mesa_is_format_compressed(texFormat);
1093          break;
1094
1095       /* GL_ARB_texture_float */
1096       case GL_TEXTURE_RED_TYPE_ARB:
1097       case GL_TEXTURE_GREEN_TYPE_ARB:
1098       case GL_TEXTURE_BLUE_TYPE_ARB:
1099       case GL_TEXTURE_ALPHA_TYPE_ARB:
1100       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1101       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1102       case GL_TEXTURE_DEPTH_TYPE_ARB:
1103          if (!ctx->Extensions.ARB_texture_float)
1104             goto invalid_pname;
1105          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1106             *params = _mesa_get_format_datatype(texFormat);
1107          else
1108             *params = GL_NONE;
1109          break;
1110
1111       /* GL_ARB_texture_multisample */
1112       case GL_TEXTURE_SAMPLES:
1113          if (!ctx->Extensions.ARB_texture_multisample)
1114             goto invalid_pname;
1115          *params = img->NumSamples;
1116          break;
1117
1118       case GL_TEXTURE_FIXED_SAMPLE_LOCATIONS:
1119          if (!ctx->Extensions.ARB_texture_multisample)
1120             goto invalid_pname;
1121          *params = img->FixedSampleLocations;
1122          break;
1123
1124       default:
1125          goto invalid_pname;
1126    }
1127
1128    /* no error if we get here */
1129    return;
1130
1131 invalid_pname:
1132    _mesa_error(ctx, GL_INVALID_ENUM,
1133                "glGetTexLevelParameter[if]v(pname=%s)",
1134                _mesa_lookup_enum_by_nr(pname));
1135 }
1136
1137
1138 static void
1139 get_tex_level_parameter_buffer(struct gl_context *ctx,
1140                                const struct gl_texture_object *texObj,
1141                                GLenum pname, GLint *params)
1142 {
1143    const struct gl_buffer_object *bo = texObj->BufferObject;
1144    gl_format texFormat = texObj->_BufferObjectFormat;
1145    GLenum internalFormat = texObj->BufferObjectFormat;
1146    GLenum baseFormat = _mesa_get_format_base_format(texFormat);
1147
1148    if (!bo) {
1149       /* undefined texture buffer object */
1150       *params = pname == GL_TEXTURE_COMPONENTS ? 1 : 0;
1151       return;
1152    }
1153
1154    switch (pname) {
1155       case GL_TEXTURE_BUFFER_DATA_STORE_BINDING:
1156          *params = bo->Name;
1157          break;
1158       case GL_TEXTURE_WIDTH:
1159          *params = bo->Size;
1160          break;
1161       case GL_TEXTURE_HEIGHT:
1162       case GL_TEXTURE_DEPTH:
1163       case GL_TEXTURE_BORDER:
1164       case GL_TEXTURE_SHARED_SIZE:
1165       case GL_TEXTURE_COMPRESSED:
1166          *params = 0;
1167          break;
1168       case GL_TEXTURE_INTERNAL_FORMAT:
1169          *params = internalFormat;
1170          break;
1171       case GL_TEXTURE_RED_SIZE:
1172       case GL_TEXTURE_GREEN_SIZE:
1173       case GL_TEXTURE_BLUE_SIZE:
1174       case GL_TEXTURE_ALPHA_SIZE:
1175          if (_mesa_base_format_has_channel(baseFormat, pname))
1176             *params = _mesa_get_format_bits(texFormat, pname);
1177          else
1178             *params = 0;
1179          break;
1180       case GL_TEXTURE_INTENSITY_SIZE:
1181       case GL_TEXTURE_LUMINANCE_SIZE:
1182          if (_mesa_base_format_has_channel(baseFormat, pname)) {
1183             *params = _mesa_get_format_bits(texFormat, pname);
1184             if (*params == 0) {
1185                /* intensity or luminance is probably stored as RGB[A] */
1186                *params = MIN2(_mesa_get_format_bits(texFormat,
1187                                                     GL_TEXTURE_RED_SIZE),
1188                               _mesa_get_format_bits(texFormat,
1189                                                     GL_TEXTURE_GREEN_SIZE));
1190             }
1191          } else {
1192             *params = 0;
1193          }
1194          break;
1195       case GL_TEXTURE_DEPTH_SIZE_ARB:
1196       case GL_TEXTURE_STENCIL_SIZE_EXT:
1197          *params = _mesa_get_format_bits(texFormat, pname);
1198          break;
1199
1200       /* GL_ARB_texture_buffer_range */
1201       case GL_TEXTURE_BUFFER_OFFSET:
1202          if (!ctx->Extensions.ARB_texture_buffer_range)
1203             goto invalid_pname;
1204          *params = texObj->BufferOffset;
1205          break;
1206       case GL_TEXTURE_BUFFER_SIZE:
1207          if (!ctx->Extensions.ARB_texture_buffer_range)
1208             goto invalid_pname;
1209          *params = (texObj->BufferSize == -1) ? bo->Size : texObj->BufferSize;
1210          break;
1211
1212       /* GL_ARB_texture_compression */
1213       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1214          /* Always illegal for GL_TEXTURE_BUFFER */
1215          _mesa_error(ctx, GL_INVALID_OPERATION,
1216                      "glGetTexLevelParameter[if]v(pname)");
1217          break;
1218
1219       /* GL_ARB_texture_float */
1220       case GL_TEXTURE_RED_TYPE_ARB:
1221       case GL_TEXTURE_GREEN_TYPE_ARB:
1222       case GL_TEXTURE_BLUE_TYPE_ARB:
1223       case GL_TEXTURE_ALPHA_TYPE_ARB:
1224       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1225       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1226       case GL_TEXTURE_DEPTH_TYPE_ARB:
1227          if (!ctx->Extensions.ARB_texture_float)
1228             goto invalid_pname;
1229          if (_mesa_base_format_has_channel(baseFormat, pname))
1230             *params = _mesa_get_format_datatype(texFormat);
1231          else
1232             *params = GL_NONE;
1233          break;
1234
1235       default:
1236          goto invalid_pname;
1237    }
1238
1239    /* no error if we get here */
1240    return;
1241
1242 invalid_pname:
1243    _mesa_error(ctx, GL_INVALID_ENUM,
1244                "glGetTexLevelParameter[if]v(pname=%s)",
1245                _mesa_lookup_enum_by_nr(pname));
1246 }
1247
1248
1249 void GLAPIENTRY
1250 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
1251                               GLenum pname, GLfloat *params )
1252 {
1253    GLint iparam;
1254    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
1255    *params = (GLfloat) iparam;
1256 }
1257
1258
1259 void GLAPIENTRY
1260 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
1261                               GLenum pname, GLint *params )
1262 {
1263    const struct gl_texture_unit *texUnit;
1264    struct gl_texture_object *texObj;
1265    GLint maxLevels;
1266    GET_CURRENT_CONTEXT(ctx);
1267
1268    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
1269       _mesa_error(ctx, GL_INVALID_OPERATION,
1270                   "glGetTexLevelParameteriv(current unit)");
1271       return;
1272    }
1273
1274    texUnit = _mesa_get_current_tex_unit(ctx);
1275
1276    if (!legal_get_tex_level_parameter_target(ctx, target)) {
1277       _mesa_error(ctx, GL_INVALID_ENUM,
1278                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
1279       return;
1280    }
1281
1282    maxLevels = _mesa_max_texture_levels(ctx, target);
1283    assert(maxLevels != 0);
1284
1285    if (level < 0 || level >= maxLevels) {
1286       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
1287       return;
1288    }
1289
1290    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1291
1292    if (target == GL_TEXTURE_BUFFER)
1293       get_tex_level_parameter_buffer(ctx, texObj, pname, params);
1294    else
1295       get_tex_level_parameter_image(ctx, texObj, target, level, pname, params);
1296 }
1297
1298
1299 void GLAPIENTRY
1300 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
1301 {
1302    struct gl_texture_object *obj;
1303    GET_CURRENT_CONTEXT(ctx);
1304
1305    obj = get_texobj(ctx, target, GL_TRUE);
1306    if (!obj)
1307       return;
1308
1309    _mesa_lock_texture(ctx, obj);
1310    switch (pname) {
1311       case GL_TEXTURE_MAG_FILTER:
1312          *params = ENUM_TO_FLOAT(obj->Sampler.MagFilter);
1313          break;
1314       case GL_TEXTURE_MIN_FILTER:
1315          *params = ENUM_TO_FLOAT(obj->Sampler.MinFilter);
1316          break;
1317       case GL_TEXTURE_WRAP_S:
1318          *params = ENUM_TO_FLOAT(obj->Sampler.WrapS);
1319          break;
1320       case GL_TEXTURE_WRAP_T:
1321          *params = ENUM_TO_FLOAT(obj->Sampler.WrapT);
1322          break;
1323       case GL_TEXTURE_WRAP_R:
1324          *params = ENUM_TO_FLOAT(obj->Sampler.WrapR);
1325          break;
1326       case GL_TEXTURE_BORDER_COLOR:
1327          if (!_mesa_is_desktop_gl(ctx))
1328             goto invalid_pname;
1329
1330          if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
1331             _mesa_update_state_locked(ctx);
1332          if (ctx->Color._ClampFragmentColor) {
1333             params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1334             params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1335             params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1336             params[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1337          }
1338          else {
1339             params[0] = obj->Sampler.BorderColor.f[0];
1340             params[1] = obj->Sampler.BorderColor.f[1];
1341             params[2] = obj->Sampler.BorderColor.f[2];
1342             params[3] = obj->Sampler.BorderColor.f[3];
1343          }
1344          break;
1345       case GL_TEXTURE_RESIDENT:
1346          if (ctx->API != API_OPENGL_COMPAT)
1347             goto invalid_pname;
1348
1349          *params = 1.0F;
1350          break;
1351       case GL_TEXTURE_PRIORITY:
1352          if (ctx->API != API_OPENGL_COMPAT)
1353             goto invalid_pname;
1354
1355          *params = obj->Priority;
1356          break;
1357       case GL_TEXTURE_MIN_LOD:
1358          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1359             goto invalid_pname;
1360
1361          *params = obj->Sampler.MinLod;
1362          break;
1363       case GL_TEXTURE_MAX_LOD:
1364          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1365             goto invalid_pname;
1366
1367          *params = obj->Sampler.MaxLod;
1368          break;
1369       case GL_TEXTURE_BASE_LEVEL:
1370          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1371             goto invalid_pname;
1372
1373          *params = (GLfloat) obj->BaseLevel;
1374          break;
1375       case GL_TEXTURE_MAX_LEVEL:
1376          *params = (GLfloat) obj->MaxLevel;
1377          break;
1378       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1379          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1380             goto invalid_pname;
1381          *params = obj->Sampler.MaxAnisotropy;
1382          break;
1383       case GL_GENERATE_MIPMAP_SGIS:
1384          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1385             goto invalid_pname;
1386
1387          *params = (GLfloat) obj->GenerateMipmap;
1388          break;
1389       case GL_TEXTURE_COMPARE_MODE_ARB:
1390          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1391              && !_mesa_is_gles3(ctx))
1392             goto invalid_pname;
1393          *params = (GLfloat) obj->Sampler.CompareMode;
1394          break;
1395       case GL_TEXTURE_COMPARE_FUNC_ARB:
1396          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1397              && !_mesa_is_gles3(ctx))
1398             goto invalid_pname;
1399          *params = (GLfloat) obj->Sampler.CompareFunc;
1400          break;
1401       case GL_DEPTH_TEXTURE_MODE_ARB:
1402          /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has
1403           * never existed in OpenGL ES.
1404           */
1405          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1406             goto invalid_pname;
1407          *params = (GLfloat) obj->DepthMode;
1408          break;
1409       case GL_TEXTURE_LOD_BIAS:
1410          if (ctx->API != API_OPENGL_COMPAT)
1411             goto invalid_pname;
1412
1413          *params = obj->Sampler.LodBias;
1414          break;
1415       case GL_TEXTURE_CROP_RECT_OES:
1416          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1417             goto invalid_pname;
1418
1419          params[0] = (GLfloat) obj->CropRect[0];
1420          params[1] = (GLfloat) obj->CropRect[1];
1421          params[2] = (GLfloat) obj->CropRect[2];
1422          params[3] = (GLfloat) obj->CropRect[3];
1423          break;
1424
1425       case GL_TEXTURE_SWIZZLE_R_EXT:
1426       case GL_TEXTURE_SWIZZLE_G_EXT:
1427       case GL_TEXTURE_SWIZZLE_B_EXT:
1428       case GL_TEXTURE_SWIZZLE_A_EXT:
1429          if ((!_mesa_is_desktop_gl(ctx)
1430               || !ctx->Extensions.EXT_texture_swizzle)
1431              && !_mesa_is_gles3(ctx))
1432             goto invalid_pname;
1433          *params = (GLfloat) obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1434          break;
1435
1436       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1437          if ((!_mesa_is_desktop_gl(ctx)
1438               || !ctx->Extensions.EXT_texture_swizzle)
1439              && !_mesa_is_gles3(ctx)) {
1440             goto invalid_pname;
1441          }
1442          else {
1443             GLuint comp;
1444             for (comp = 0; comp < 4; comp++) {
1445                params[comp] = (GLfloat) obj->Swizzle[comp];
1446             }
1447          }
1448          break;
1449
1450       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1451          if (!_mesa_is_desktop_gl(ctx)
1452              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1453             goto invalid_pname;
1454          *params = (GLfloat) obj->Sampler.CubeMapSeamless;
1455          break;
1456
1457       case GL_TEXTURE_IMMUTABLE_FORMAT:
1458          if (!ctx->Extensions.ARB_texture_storage)
1459             goto invalid_pname;
1460          *params = (GLfloat) obj->Immutable;
1461          break;
1462
1463       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1464          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1465             goto invalid_pname;
1466          *params = obj->RequiredTextureImageUnits;
1467          break;
1468
1469       case GL_TEXTURE_SRGB_DECODE_EXT:
1470          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1471             goto invalid_pname;
1472          *params = (GLfloat) obj->Sampler.sRGBDecode;
1473          break;
1474
1475       default:
1476          goto invalid_pname;
1477    }
1478
1479    /* no error if we get here */
1480    _mesa_unlock_texture(ctx, obj);
1481    return;
1482
1483 invalid_pname:
1484    _mesa_unlock_texture(ctx, obj);
1485    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname);
1486 }
1487
1488
1489 void GLAPIENTRY
1490 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1491 {
1492    struct gl_texture_object *obj;
1493    GET_CURRENT_CONTEXT(ctx);
1494
1495    obj = get_texobj(ctx, target, GL_TRUE);
1496    if (!obj)
1497       return;
1498
1499    _mesa_lock_texture(ctx, obj);
1500    switch (pname) {
1501       case GL_TEXTURE_MAG_FILTER:
1502          *params = (GLint) obj->Sampler.MagFilter;
1503          break;
1504       case GL_TEXTURE_MIN_FILTER:
1505          *params = (GLint) obj->Sampler.MinFilter;
1506          break;
1507       case GL_TEXTURE_WRAP_S:
1508          *params = (GLint) obj->Sampler.WrapS;
1509          break;
1510       case GL_TEXTURE_WRAP_T:
1511          *params = (GLint) obj->Sampler.WrapT;
1512          break;
1513       case GL_TEXTURE_WRAP_R:
1514          *params = (GLint) obj->Sampler.WrapR;
1515          break;
1516       case GL_TEXTURE_BORDER_COLOR:
1517          if (!_mesa_is_desktop_gl(ctx))
1518             goto invalid_pname;
1519
1520          {
1521             GLfloat b[4];
1522             b[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1523             b[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1524             b[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1525             b[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1526             params[0] = FLOAT_TO_INT(b[0]);
1527             params[1] = FLOAT_TO_INT(b[1]);
1528             params[2] = FLOAT_TO_INT(b[2]);
1529             params[3] = FLOAT_TO_INT(b[3]);
1530          }
1531          break;
1532       case GL_TEXTURE_RESIDENT:
1533          if (ctx->API != API_OPENGL_COMPAT)
1534             goto invalid_pname;
1535
1536          *params = 1;
1537          break;
1538       case GL_TEXTURE_PRIORITY:
1539          if (ctx->API != API_OPENGL_COMPAT)
1540             goto invalid_pname;
1541
1542          *params = FLOAT_TO_INT(obj->Priority);
1543          break;
1544       case GL_TEXTURE_MIN_LOD:
1545          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1546             goto invalid_pname;
1547
1548          *params = (GLint) obj->Sampler.MinLod;
1549          break;
1550       case GL_TEXTURE_MAX_LOD:
1551          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1552             goto invalid_pname;
1553
1554          *params = (GLint) obj->Sampler.MaxLod;
1555          break;
1556       case GL_TEXTURE_BASE_LEVEL:
1557          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1558             goto invalid_pname;
1559
1560          *params = obj->BaseLevel;
1561          break;
1562       case GL_TEXTURE_MAX_LEVEL:
1563          *params = obj->MaxLevel;
1564          break;
1565       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1566          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1567             goto invalid_pname;
1568          *params = (GLint) obj->Sampler.MaxAnisotropy;
1569          break;
1570       case GL_GENERATE_MIPMAP_SGIS:
1571          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1572             goto invalid_pname;
1573
1574          *params = (GLint) obj->GenerateMipmap;
1575          break;
1576       case GL_TEXTURE_COMPARE_MODE_ARB:
1577          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1578              && !_mesa_is_gles3(ctx))
1579             goto invalid_pname;
1580          *params = (GLint) obj->Sampler.CompareMode;
1581          break;
1582       case GL_TEXTURE_COMPARE_FUNC_ARB:
1583          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1584              && !_mesa_is_gles3(ctx))
1585             goto invalid_pname;
1586          *params = (GLint) obj->Sampler.CompareFunc;
1587          break;
1588       case GL_DEPTH_TEXTURE_MODE_ARB:
1589          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1590             goto invalid_pname;
1591          *params = (GLint) obj->DepthMode;
1592          break;
1593       case GL_TEXTURE_LOD_BIAS:
1594          if (ctx->API != API_OPENGL_COMPAT)
1595             goto invalid_pname;
1596
1597          *params = (GLint) obj->Sampler.LodBias;
1598          break;
1599       case GL_TEXTURE_CROP_RECT_OES:
1600          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1601             goto invalid_pname;
1602
1603          params[0] = obj->CropRect[0];
1604          params[1] = obj->CropRect[1];
1605          params[2] = obj->CropRect[2];
1606          params[3] = obj->CropRect[3];
1607          break;
1608       case GL_TEXTURE_SWIZZLE_R_EXT:
1609       case GL_TEXTURE_SWIZZLE_G_EXT:
1610       case GL_TEXTURE_SWIZZLE_B_EXT:
1611       case GL_TEXTURE_SWIZZLE_A_EXT:
1612          if ((!_mesa_is_desktop_gl(ctx)
1613               || !ctx->Extensions.EXT_texture_swizzle)
1614              && !_mesa_is_gles3(ctx))
1615             goto invalid_pname;
1616          *params = obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1617          break;
1618
1619       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1620          if ((!_mesa_is_desktop_gl(ctx)
1621               || !ctx->Extensions.EXT_texture_swizzle)
1622              && !_mesa_is_gles3(ctx))
1623             goto invalid_pname;
1624          COPY_4V(params, obj->Swizzle);
1625          break;
1626
1627       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1628          if (!_mesa_is_desktop_gl(ctx)
1629              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1630             goto invalid_pname;
1631          *params = (GLint) obj->Sampler.CubeMapSeamless;
1632          break;
1633
1634       case GL_TEXTURE_IMMUTABLE_FORMAT:
1635          if (!ctx->Extensions.ARB_texture_storage)
1636             goto invalid_pname;
1637          *params = (GLint) obj->Immutable;
1638          break;
1639
1640       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1641          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1642             goto invalid_pname;
1643          *params = obj->RequiredTextureImageUnits;
1644          break;
1645
1646       case GL_TEXTURE_SRGB_DECODE_EXT:
1647          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1648             goto invalid_pname;
1649          *params = obj->Sampler.sRGBDecode;
1650          break;
1651
1652       default:
1653          goto invalid_pname;
1654    }
1655
1656    /* no error if we get here */
1657    _mesa_unlock_texture(ctx, obj);
1658    return;
1659
1660 invalid_pname:
1661    _mesa_unlock_texture(ctx, obj);
1662    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
1663 }
1664
1665
1666 /** New in GL 3.0 */
1667 void GLAPIENTRY
1668 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1669 {
1670    struct gl_texture_object *texObj;
1671    GET_CURRENT_CONTEXT(ctx);
1672
1673    texObj = get_texobj(ctx, target, GL_TRUE);
1674    if (!texObj)
1675       return;
1676
1677    switch (pname) {
1678    case GL_TEXTURE_BORDER_COLOR:
1679       COPY_4V(params, texObj->Sampler.BorderColor.i);
1680       break;
1681    default:
1682       _mesa_GetTexParameteriv(target, pname, params);
1683    }
1684 }
1685
1686
1687 /** New in GL 3.0 */
1688 void GLAPIENTRY
1689 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1690 {
1691    struct gl_texture_object *texObj;
1692    GET_CURRENT_CONTEXT(ctx);
1693
1694    texObj = get_texobj(ctx, target, GL_TRUE);
1695    if (!texObj)
1696       return;
1697
1698    switch (pname) {
1699    case GL_TEXTURE_BORDER_COLOR:
1700       COPY_4V(params, texObj->Sampler.BorderColor.i);
1701       break;
1702    default:
1703       {
1704          GLint ip[4];
1705          _mesa_GetTexParameteriv(target, pname, ip);
1706          params[0] = ip[0];
1707          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1708              pname == GL_TEXTURE_CROP_RECT_OES) {
1709             params[1] = ip[1];
1710             params[2] = ip[2];
1711             params[3] = ip[3];
1712          }
1713       }
1714    }
1715 }