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)
  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_OPERATION,
 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 && 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 && 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)
 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)
 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    ASSERT_OUTSIDE_BEGIN_END(ctx);
 646
 647    texObj = get_texobj(ctx, target, GL_FALSE);
 648    if (!texObj)
 649       return;
 650
 651    switch (pname) {
 652    case GL_TEXTURE_MIN_FILTER:
 653    case GL_TEXTURE_MAG_FILTER:
 654    case GL_TEXTURE_WRAP_S:
 655    case GL_TEXTURE_WRAP_T:
 656    case GL_TEXTURE_WRAP_R:
 657    case GL_TEXTURE_BASE_LEVEL:
 658    case GL_TEXTURE_MAX_LEVEL:
 659    case GL_GENERATE_MIPMAP_SGIS:
 660    case GL_TEXTURE_COMPARE_MODE_ARB:
 661    case GL_TEXTURE_COMPARE_FUNC_ARB:
 662    case GL_DEPTH_TEXTURE_MODE_ARB:
 663    case GL_TEXTURE_SRGB_DECODE_EXT:
 664    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 665       {
 666          /* convert float param to int */
 667          GLint p[4];
 668          p[0] = (GLint) param;
 669          p[1] = p[2] = p[3] = 0;
 670          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 671       }
 672       break;
 673    case GL_TEXTURE_SWIZZLE_R_EXT:
 674    case GL_TEXTURE_SWIZZLE_G_EXT:
 675    case GL_TEXTURE_SWIZZLE_B_EXT:
 676    case GL_TEXTURE_SWIZZLE_A_EXT:
 677       {
 678          GLint p[4];
 679          p[0] = (GLint) param;
 680          p[1] = p[2] = p[3] = 0;
 681          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 682       }
 683       break;
 684    default:
 685       {
 686          /* this will generate an error if pname is illegal */
 687          GLfloat p[4];
 688          p[0] = param;
 689          p[1] = p[2] = p[3] = 0.0F;
 690          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 691       }
 692    }
 693
 694    if (ctx->Driver.TexParameter && need_update) {
 695       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 696    }
 697 }
 698
 699
 700 void GLAPIENTRY
 701 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 702 {
 703    GLboolean need_update;
 704    struct gl_texture_object *texObj;
 705    GET_CURRENT_CONTEXT(ctx);
 706    ASSERT_OUTSIDE_BEGIN_END(ctx);
 707
 708    texObj = get_texobj(ctx, target, GL_FALSE);
 709    if (!texObj)
 710       return;
 711
 712    switch (pname) {
 713    case GL_TEXTURE_MIN_FILTER:
 714    case GL_TEXTURE_MAG_FILTER:
 715    case GL_TEXTURE_WRAP_S:
 716    case GL_TEXTURE_WRAP_T:
 717    case GL_TEXTURE_WRAP_R:
 718    case GL_TEXTURE_BASE_LEVEL:
 719    case GL_TEXTURE_MAX_LEVEL:
 720    case GL_GENERATE_MIPMAP_SGIS:
 721    case GL_TEXTURE_COMPARE_MODE_ARB:
 722    case GL_TEXTURE_COMPARE_FUNC_ARB:
 723    case GL_DEPTH_TEXTURE_MODE_ARB:
 724    case GL_TEXTURE_SRGB_DECODE_EXT:
 725    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 726       {
 727          /* convert float param to int */
 728          GLint p[4];
 729          p[0] = (GLint) params[0];
 730          p[1] = p[2] = p[3] = 0;
 731          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 732       }
 733       break;
 734    case GL_TEXTURE_CROP_RECT_OES:
 735       {
 736          /* convert float params to int */
 737          GLint iparams[4];
 738          iparams[0] = (GLint) params[0];
 739          iparams[1] = (GLint) params[1];
 740          iparams[2] = (GLint) params[2];
 741          iparams[3] = (GLint) params[3];
 742          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 743       }
 744       break;
 745    case GL_TEXTURE_SWIZZLE_R_EXT:
 746    case GL_TEXTURE_SWIZZLE_G_EXT:
 747    case GL_TEXTURE_SWIZZLE_B_EXT:
 748    case GL_TEXTURE_SWIZZLE_A_EXT:
 749    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 750       {
 751          GLint p[4] = {0, 0, 0, 0};
 752          p[0] = (GLint) params[0];
 753          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT) {
 754             p[1] = (GLint) params[1];
 755             p[2] = (GLint) params[2];
 756             p[3] = (GLint) params[3];
 757          }
 758          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 759       }
 760       break;
 761    default:
 762       /* this will generate an error if pname is illegal */
 763       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 764    }
 765
 766    if (ctx->Driver.TexParameter && need_update) {
 767       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 768    }
 769 }
 770
 771
 772 void GLAPIENTRY
 773 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 774 {
 775    GLboolean need_update;
 776    struct gl_texture_object *texObj;
 777    GET_CURRENT_CONTEXT(ctx);
 778    ASSERT_OUTSIDE_BEGIN_END(ctx);
 779
 780    texObj = get_texobj(ctx, target, GL_FALSE);
 781    if (!texObj)
 782       return;
 783
 784    switch (pname) {
 785    case GL_TEXTURE_MIN_LOD:
 786    case GL_TEXTURE_MAX_LOD:
 787    case GL_TEXTURE_PRIORITY:
 788    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 789    case GL_TEXTURE_LOD_BIAS:
 790    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 791       {
 792          GLfloat fparam[4];
 793          fparam[0] = (GLfloat) param;
 794          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 795          /* convert int param to float */
 796          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 797       }
 798       break;
 799    default:
 800       /* this will generate an error if pname is illegal */
 801       {
 802          GLint iparam[4];
 803          iparam[0] = param;
 804          iparam[1] = iparam[2] = iparam[3] = 0;
 805          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 806       }
 807    }
 808
 809    if (ctx->Driver.TexParameter && need_update) {
 810       GLfloat fparam = (GLfloat) param;
 811       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 812    }
 813 }
 814
 815
 816 void GLAPIENTRY
 817 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 818 {
 819    GLboolean need_update;
 820    struct gl_texture_object *texObj;
 821    GET_CURRENT_CONTEXT(ctx);
 822    ASSERT_OUTSIDE_BEGIN_END(ctx);
 823
 824    texObj = get_texobj(ctx, target, GL_FALSE);
 825    if (!texObj)
 826       return;
 827
 828    switch (pname) {
 829    case GL_TEXTURE_BORDER_COLOR:
 830       {
 831          /* convert int params to float */
 832          GLfloat fparams[4];
 833          fparams[0] = INT_TO_FLOAT(params[0]);
 834          fparams[1] = INT_TO_FLOAT(params[1]);
 835          fparams[2] = INT_TO_FLOAT(params[2]);
 836          fparams[3] = INT_TO_FLOAT(params[3]);
 837          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 838       }
 839       break;
 840    case GL_TEXTURE_MIN_LOD:
 841    case GL_TEXTURE_MAX_LOD:
 842    case GL_TEXTURE_PRIORITY:
 843    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 844    case GL_TEXTURE_LOD_BIAS:
 845    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 846       {
 847          /* convert int param to float */
 848          GLfloat fparams[4];
 849          fparams[0] = (GLfloat) params[0];
 850          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 851          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 852       }
 853       break;
 854    default:
 855       /* this will generate an error if pname is illegal */
 856       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 857    }
 858
 859    if (ctx->Driver.TexParameter && need_update) {
 860       GLfloat fparams[4];
 861       fparams[0] = INT_TO_FLOAT(params[0]);
 862       if (pname == GL_TEXTURE_BORDER_COLOR ||
 863           pname == GL_TEXTURE_CROP_RECT_OES) {
 864          fparams[1] = INT_TO_FLOAT(params[1]);
 865          fparams[2] = INT_TO_FLOAT(params[2]);
 866          fparams[3] = INT_TO_FLOAT(params[3]);
 867       }
 868       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 869    }
 870 }
 871
 872
 873 /**
 874  * Set tex parameter to integer value(s).  Primarily intended to set
 875  * integer-valued texture border color (for integer-valued textures).
 876  * New in GL 3.0.
 877  */
 878 void GLAPIENTRY
 879 _mesa_TexParameterIiv(GLenum target, GLenum pname, const GLint *params)
 880 {
 881    struct gl_texture_object *texObj;
 882    GET_CURRENT_CONTEXT(ctx);
 883    ASSERT_OUTSIDE_BEGIN_END(ctx);
 884
 885    texObj = get_texobj(ctx, target, GL_FALSE);
 886    if (!texObj)
 887       return;
 888
 889    switch (pname) {
 890    case GL_TEXTURE_BORDER_COLOR:
 891       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 892       /* set the integer-valued border color */
 893       COPY_4V(texObj->Sampler.BorderColor.i, params);
 894       break;
 895    default:
 896       _mesa_TexParameteriv(target, pname, params);
 897       break;
 898    }
 899    /* XXX no driver hook for TexParameterIiv() yet */
 900 }
 901
 902
 903 /**
 904  * Set tex parameter to unsigned integer value(s).  Primarily intended to set
 905  * uint-valued texture border color (for integer-valued textures).
 906  * New in GL 3.0
 907  */
 908 void GLAPIENTRY
 909 _mesa_TexParameterIuiv(GLenum target, GLenum pname, const GLuint *params)
 910 {
 911    struct gl_texture_object *texObj;
 912    GET_CURRENT_CONTEXT(ctx);
 913    ASSERT_OUTSIDE_BEGIN_END(ctx);
 914
 915    texObj = get_texobj(ctx, target, GL_FALSE);
 916    if (!texObj)
 917       return;
 918
 919    switch (pname) {
 920    case GL_TEXTURE_BORDER_COLOR:
 921       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 922       /* set the unsigned integer-valued border color */
 923       COPY_4V(texObj->Sampler.BorderColor.ui, params);
 924       break;
 925    default:
 926       _mesa_TexParameteriv(target, pname, (const GLint *) params);
 927       break;
 928    }
 929    /* XXX no driver hook for TexParameterIuiv() yet */
 930 }
 931
 932
 933 static GLboolean
 934 legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target)
 935 {
 936    switch (target) {
 937    case GL_TEXTURE_1D:
 938    case GL_PROXY_TEXTURE_1D:
 939    case GL_TEXTURE_2D:
 940    case GL_PROXY_TEXTURE_2D:
 941    case GL_TEXTURE_3D:
 942    case GL_PROXY_TEXTURE_3D:
 943       return GL_TRUE;
 944    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
 945    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
 946    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
 947    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
 948    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
 949    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
 950    case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
 951       return ctx->Extensions.ARB_texture_cube_map;
 952    case GL_TEXTURE_RECTANGLE_NV:
 953    case GL_PROXY_TEXTURE_RECTANGLE_NV:
 954       return ctx->Extensions.NV_texture_rectangle;
 955    case GL_TEXTURE_1D_ARRAY_EXT:
 956    case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
 957    case GL_TEXTURE_2D_ARRAY_EXT:
 958    case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
 959       return (ctx->Extensions.MESA_texture_array ||
 960               ctx->Extensions.EXT_texture_array);
 961    case GL_TEXTURE_BUFFER:
 962       /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
 963        * but not in earlier versions that expose ARB_texture_buffer_object.
 964        *
 965        * From the ARB_texture_buffer_object spec:
 966        * "(7) Do buffer textures support texture parameters (TexParameter) or
 967        *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
 968        *
 969        *    RESOLVED:  No. [...] Note that the spec edits above don't add
 970        *    explicit error language for any of these cases.  That is because
 971        *    each of the functions enumerate the set of valid <target>
 972        *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
 973        *    these cases means that target is not legal, and an INVALID_ENUM
 974        *    error should be generated."
 975        *
 976        * From the OpenGL 3.1 spec:
 977        * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
 978        */
 979       return _mesa_is_desktop_gl(ctx) && ctx->Version >= 31;
 980    default:
 981       return GL_FALSE;
 982    }
 983 }
 984
 985
 986 static void
 987 get_tex_level_parameter_image(struct gl_context *ctx,
 988                               const struct gl_texture_object *texObj,
 989                               GLenum target, GLint level,
 990                               GLenum pname, GLint *params)
 991 {
 992    const struct gl_texture_image *img = NULL;
 993    gl_format texFormat;
 994
 995    img = _mesa_select_tex_image(ctx, texObj, target, level);
 996    if (!img || img->TexFormat == MESA_FORMAT_NONE) {
 997       /* undefined texture image */
 998       if (pname == GL_TEXTURE_COMPONENTS)
 999          *params = 1;
1000       else
1001          *params = 0;
1002       return;
1003    }
1004
1005    texFormat = img->TexFormat;
1006
1007    switch (pname) {
1008       case GL_TEXTURE_WIDTH:
1009          *params = img->Width;
1010          break;
1011       case GL_TEXTURE_HEIGHT:
1012          *params = img->Height;
1013          break;
1014       case GL_TEXTURE_DEPTH:
1015          *params = img->Depth;
1016          break;
1017       case GL_TEXTURE_INTERNAL_FORMAT:
1018          if (_mesa_is_format_compressed(texFormat)) {
1019             /* need to return the actual compressed format */
1020             *params = _mesa_compressed_format_to_glenum(ctx, texFormat);
1021          }
1022          else {
1023             /* If the true internal format is not compressed but the user
1024              * requested a generic compressed format, we have to return the
1025              * generic base format that matches.
1026              *
1027              * From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
1028              *
1029              *     "If no specific compressed format is available,
1030              *     internalformat is instead replaced by the corresponding base
1031              *     internal format."
1032              *
1033              * Otherwise just return the user's requested internal format
1034              */
1035             const GLenum f =
1036                _mesa_gl_compressed_format_base_format(img->InternalFormat);
1037
1038             *params = (f != 0) ? f : img->InternalFormat;
1039          }
1040          break;
1041       case GL_TEXTURE_BORDER:
1042          *params = img->Border;
1043          break;
1044       case GL_TEXTURE_RED_SIZE:
1045       case GL_TEXTURE_GREEN_SIZE:
1046       case GL_TEXTURE_BLUE_SIZE:
1047       case GL_TEXTURE_ALPHA_SIZE:
1048          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1049             *params = _mesa_get_format_bits(texFormat, pname);
1050          else
1051             *params = 0;
1052          break;
1053       case GL_TEXTURE_INTENSITY_SIZE:
1054       case GL_TEXTURE_LUMINANCE_SIZE:
1055          if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
1056             *params = _mesa_get_format_bits(texFormat, pname);
1057             if (*params == 0) {
1058                /* intensity or luminance is probably stored as RGB[A] */
1059                *params = MIN2(_mesa_get_format_bits(texFormat,
1060                                                     GL_TEXTURE_RED_SIZE),
1061                               _mesa_get_format_bits(texFormat,
1062                                                     GL_TEXTURE_GREEN_SIZE));
1063             }
1064          }
1065          else {
1066             *params = 0;
1067          }
1068          break;
1069       case GL_TEXTURE_DEPTH_SIZE_ARB:
1070          if (!ctx->Extensions.ARB_depth_texture)
1071             goto invalid_pname;
1072          *params = _mesa_get_format_bits(texFormat, pname);
1073          break;
1074       case GL_TEXTURE_STENCIL_SIZE_EXT:
1075          if (!ctx->Extensions.EXT_packed_depth_stencil &&
1076              !ctx->Extensions.ARB_framebuffer_object)
1077             goto invalid_pname;
1078          *params = _mesa_get_format_bits(texFormat, pname);
1079          break;
1080       case GL_TEXTURE_SHARED_SIZE:
1081          if (ctx->Version < 30 &&
1082              !ctx->Extensions.EXT_texture_shared_exponent)
1083             goto invalid_pname;
1084          *params = texFormat == MESA_FORMAT_RGB9_E5_FLOAT ? 5 : 0;
1085          break;
1086
1087       /* GL_ARB_texture_compression */
1088       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1089          if (_mesa_is_format_compressed(texFormat) &&
1090              !_mesa_is_proxy_texture(target)) {
1091             *params = _mesa_format_image_size(texFormat, img->Width,
1092                                               img->Height, img->Depth);
1093          }
1094          else {
1095             _mesa_error(ctx, GL_INVALID_OPERATION,
1096                         "glGetTexLevelParameter[if]v(pname)");
1097          }
1098          break;
1099       case GL_TEXTURE_COMPRESSED:
1100          *params = (GLint) _mesa_is_format_compressed(texFormat);
1101          break;
1102
1103       /* GL_ARB_texture_float */
1104       case GL_TEXTURE_RED_TYPE_ARB:
1105       case GL_TEXTURE_GREEN_TYPE_ARB:
1106       case GL_TEXTURE_BLUE_TYPE_ARB:
1107       case GL_TEXTURE_ALPHA_TYPE_ARB:
1108       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1109       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1110       case GL_TEXTURE_DEPTH_TYPE_ARB:
1111          if (!ctx->Extensions.ARB_texture_float)
1112             goto invalid_pname;
1113          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1114             *params = _mesa_get_format_datatype(texFormat);
1115          else
1116             *params = GL_NONE;
1117          break;
1118
1119       default:
1120          goto invalid_pname;
1121    }
1122
1123    /* no error if we get here */
1124    return;
1125
1126 invalid_pname:
1127    _mesa_error(ctx, GL_INVALID_ENUM,
1128                "glGetTexLevelParameter[if]v(pname=%s)",
1129                _mesa_lookup_enum_by_nr(pname));
1130 }
1131
1132
1133 static void
1134 get_tex_level_parameter_buffer(struct gl_context *ctx,
1135                                const struct gl_texture_object *texObj,
1136                                GLenum pname, GLint *params)
1137 {
1138    const struct gl_buffer_object *bo = texObj->BufferObject;
1139    gl_format texFormat = texObj->_BufferObjectFormat;
1140    GLenum internalFormat = texObj->BufferObjectFormat;
1141    GLenum baseFormat = _mesa_get_format_base_format(texFormat);
1142
1143    if (!bo) {
1144       /* undefined texture buffer object */
1145       *params = pname == GL_TEXTURE_COMPONENTS ? 1 : 0;
1146       return;
1147    }
1148
1149    switch (pname) {
1150       case GL_TEXTURE_BUFFER_DATA_STORE_BINDING:
1151          *params = bo->Name;
1152          break;
1153       case GL_TEXTURE_WIDTH:
1154          *params = bo->Size;
1155          break;
1156       case GL_TEXTURE_HEIGHT:
1157       case GL_TEXTURE_DEPTH:
1158       case GL_TEXTURE_BORDER:
1159       case GL_TEXTURE_SHARED_SIZE:
1160       case GL_TEXTURE_COMPRESSED:
1161          *params = 0;
1162          break;
1163       case GL_TEXTURE_INTERNAL_FORMAT:
1164          *params = internalFormat;
1165          break;
1166       case GL_TEXTURE_RED_SIZE:
1167       case GL_TEXTURE_GREEN_SIZE:
1168       case GL_TEXTURE_BLUE_SIZE:
1169       case GL_TEXTURE_ALPHA_SIZE:
1170          if (_mesa_base_format_has_channel(baseFormat, pname))
1171             *params = _mesa_get_format_bits(texFormat, pname);
1172          else
1173             *params = 0;
1174          break;
1175       case GL_TEXTURE_INTENSITY_SIZE:
1176       case GL_TEXTURE_LUMINANCE_SIZE:
1177          if (_mesa_base_format_has_channel(baseFormat, pname)) {
1178             *params = _mesa_get_format_bits(texFormat, pname);
1179             if (*params == 0) {
1180                /* intensity or luminance is probably stored as RGB[A] */
1181                *params = MIN2(_mesa_get_format_bits(texFormat,
1182                                                     GL_TEXTURE_RED_SIZE),
1183                               _mesa_get_format_bits(texFormat,
1184                                                     GL_TEXTURE_GREEN_SIZE));
1185             }
1186          } else {
1187             *params = 0;
1188          }
1189          break;
1190       case GL_TEXTURE_DEPTH_SIZE_ARB:
1191       case GL_TEXTURE_STENCIL_SIZE_EXT:
1192          *params = _mesa_get_format_bits(texFormat, pname);
1193          break;
1194
1195       /* GL_ARB_texture_compression */
1196       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1197          /* Always illegal for GL_TEXTURE_BUFFER */
1198          _mesa_error(ctx, GL_INVALID_OPERATION,
1199                      "glGetTexLevelParameter[if]v(pname)");
1200          break;
1201
1202       /* GL_ARB_texture_float */
1203       case GL_TEXTURE_RED_TYPE_ARB:
1204       case GL_TEXTURE_GREEN_TYPE_ARB:
1205       case GL_TEXTURE_BLUE_TYPE_ARB:
1206       case GL_TEXTURE_ALPHA_TYPE_ARB:
1207       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1208       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1209       case GL_TEXTURE_DEPTH_TYPE_ARB:
1210          if (!ctx->Extensions.ARB_texture_float)
1211             goto invalid_pname;
1212          if (_mesa_base_format_has_channel(baseFormat, pname))
1213             *params = _mesa_get_format_datatype(texFormat);
1214          else
1215             *params = GL_NONE;
1216          break;
1217
1218       default:
1219          goto invalid_pname;
1220    }
1221
1222    /* no error if we get here */
1223    return;
1224
1225 invalid_pname:
1226    _mesa_error(ctx, GL_INVALID_ENUM,
1227                "glGetTexLevelParameter[if]v(pname=%s)",
1228                _mesa_lookup_enum_by_nr(pname));
1229 }
1230
1231
1232 void GLAPIENTRY
1233 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
1234                               GLenum pname, GLfloat *params )
1235 {
1236    GLint iparam;
1237    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
1238    *params = (GLfloat) iparam;
1239 }
1240
1241
1242 void GLAPIENTRY
1243 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
1244                               GLenum pname, GLint *params )
1245 {
1246    const struct gl_texture_unit *texUnit;
1247    struct gl_texture_object *texObj;
1248    GLint maxLevels;
1249    GET_CURRENT_CONTEXT(ctx);
1250    ASSERT_OUTSIDE_BEGIN_END(ctx);
1251
1252    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
1253       _mesa_error(ctx, GL_INVALID_OPERATION,
1254                   "glGetTexLevelParameteriv(current unit)");
1255       return;
1256    }
1257
1258    texUnit = _mesa_get_current_tex_unit(ctx);
1259
1260    if (!legal_get_tex_level_parameter_target(ctx, target)) {
1261       _mesa_error(ctx, GL_INVALID_ENUM,
1262                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
1263       return;
1264    }
1265
1266    maxLevels = _mesa_max_texture_levels(ctx, target);
1267    assert(maxLevels != 0);
1268
1269    if (level < 0 || level >= maxLevels) {
1270       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
1271       return;
1272    }
1273
1274    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1275
1276    if (target == GL_TEXTURE_BUFFER)
1277       get_tex_level_parameter_buffer(ctx, texObj, pname, params);
1278    else
1279       get_tex_level_parameter_image(ctx, texObj, target, level, pname, params);
1280 }
1281
1282
1283 void GLAPIENTRY
1284 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
1285 {
1286    struct gl_texture_object *obj;
1287    GET_CURRENT_CONTEXT(ctx);
1288    ASSERT_OUTSIDE_BEGIN_END(ctx);
1289
1290    obj = get_texobj(ctx, target, GL_TRUE);
1291    if (!obj)
1292       return;
1293
1294    _mesa_lock_texture(ctx, obj);
1295    switch (pname) {
1296       case GL_TEXTURE_MAG_FILTER:
1297          *params = ENUM_TO_FLOAT(obj->Sampler.MagFilter);
1298          break;
1299       case GL_TEXTURE_MIN_FILTER:
1300          *params = ENUM_TO_FLOAT(obj->Sampler.MinFilter);
1301          break;
1302       case GL_TEXTURE_WRAP_S:
1303          *params = ENUM_TO_FLOAT(obj->Sampler.WrapS);
1304          break;
1305       case GL_TEXTURE_WRAP_T:
1306          *params = ENUM_TO_FLOAT(obj->Sampler.WrapT);
1307          break;
1308       case GL_TEXTURE_WRAP_R:
1309          *params = ENUM_TO_FLOAT(obj->Sampler.WrapR);
1310          break;
1311       case GL_TEXTURE_BORDER_COLOR:
1312          if (!_mesa_is_desktop_gl(ctx))
1313             goto invalid_pname;
1314
1315          if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
1316             _mesa_update_state_locked(ctx);
1317          if (ctx->Color._ClampFragmentColor) {
1318             params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1319             params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1320             params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1321             params[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1322          }
1323          else {
1324             params[0] = obj->Sampler.BorderColor.f[0];
1325             params[1] = obj->Sampler.BorderColor.f[1];
1326             params[2] = obj->Sampler.BorderColor.f[2];
1327             params[3] = obj->Sampler.BorderColor.f[3];
1328          }
1329          break;
1330       case GL_TEXTURE_RESIDENT:
1331          if (ctx->API != API_OPENGL)
1332             goto invalid_pname;
1333
1334          *params = 1.0F;
1335          break;
1336       case GL_TEXTURE_PRIORITY:
1337          if (ctx->API != API_OPENGL)
1338             goto invalid_pname;
1339
1340          *params = obj->Priority;
1341          break;
1342       case GL_TEXTURE_MIN_LOD:
1343          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1344             goto invalid_pname;
1345
1346          *params = obj->Sampler.MinLod;
1347          break;
1348       case GL_TEXTURE_MAX_LOD:
1349          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1350             goto invalid_pname;
1351
1352          *params = obj->Sampler.MaxLod;
1353          break;
1354       case GL_TEXTURE_BASE_LEVEL:
1355          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1356             goto invalid_pname;
1357
1358          *params = (GLfloat) obj->BaseLevel;
1359          break;
1360       case GL_TEXTURE_MAX_LEVEL:
1361          *params = (GLfloat) obj->MaxLevel;
1362          break;
1363       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1364          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1365             goto invalid_pname;
1366          *params = obj->Sampler.MaxAnisotropy;
1367          break;
1368       case GL_GENERATE_MIPMAP_SGIS:
1369          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1370             goto invalid_pname;
1371
1372          *params = (GLfloat) obj->GenerateMipmap;
1373          break;
1374       case GL_TEXTURE_COMPARE_MODE_ARB:
1375          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1376              && !_mesa_is_gles3(ctx))
1377             goto invalid_pname;
1378          *params = (GLfloat) obj->Sampler.CompareMode;
1379          break;
1380       case GL_TEXTURE_COMPARE_FUNC_ARB:
1381          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1382              && !_mesa_is_gles3(ctx))
1383             goto invalid_pname;
1384          *params = (GLfloat) obj->Sampler.CompareFunc;
1385          break;
1386       case GL_DEPTH_TEXTURE_MODE_ARB:
1387          /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has
1388           * never existed in OpenGL ES.
1389           */
1390          if (ctx->API != API_OPENGL || !ctx->Extensions.ARB_depth_texture)
1391             goto invalid_pname;
1392          *params = (GLfloat) obj->DepthMode;
1393          break;
1394       case GL_TEXTURE_LOD_BIAS:
1395          if (ctx->API != API_OPENGL)
1396             goto invalid_pname;
1397
1398          *params = obj->Sampler.LodBias;
1399          break;
1400       case GL_TEXTURE_CROP_RECT_OES:
1401          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1402             goto invalid_pname;
1403
1404          params[0] = obj->CropRect[0];
1405          params[1] = obj->CropRect[1];
1406          params[2] = obj->CropRect[2];
1407          params[3] = obj->CropRect[3];
1408          break;
1409
1410       case GL_TEXTURE_SWIZZLE_R_EXT:
1411       case GL_TEXTURE_SWIZZLE_G_EXT:
1412       case GL_TEXTURE_SWIZZLE_B_EXT:
1413       case GL_TEXTURE_SWIZZLE_A_EXT:
1414          if ((!_mesa_is_desktop_gl(ctx)
1415               || !ctx->Extensions.EXT_texture_swizzle)
1416              && !_mesa_is_gles3(ctx))
1417             goto invalid_pname;
1418          *params = (GLfloat) obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1419          break;
1420
1421       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1422          if ((!_mesa_is_desktop_gl(ctx)
1423               || !ctx->Extensions.EXT_texture_swizzle)
1424              && !_mesa_is_gles3(ctx)) {
1425             goto invalid_pname;
1426          }
1427          else {
1428             GLuint comp;
1429             for (comp = 0; comp < 4; comp++) {
1430                params[comp] = (GLfloat) obj->Swizzle[comp];
1431             }
1432          }
1433          break;
1434
1435       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1436          if (!_mesa_is_desktop_gl(ctx)
1437              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1438             goto invalid_pname;
1439          *params = (GLfloat) obj->Sampler.CubeMapSeamless;
1440          break;
1441
1442       case GL_TEXTURE_IMMUTABLE_FORMAT:
1443          if (!ctx->Extensions.ARB_texture_storage)
1444             goto invalid_pname;
1445          *params = (GLfloat) obj->Immutable;
1446          break;
1447
1448       case GL_TEXTURE_SRGB_DECODE_EXT:
1449          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1450             goto invalid_pname;
1451          *params = (GLfloat) obj->Sampler.sRGBDecode;
1452          break;
1453
1454       default:
1455          goto invalid_pname;
1456    }
1457
1458    /* no error if we get here */
1459    _mesa_unlock_texture(ctx, obj);
1460    return;
1461
1462 invalid_pname:
1463    _mesa_unlock_texture(ctx, obj);
1464    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname);
1465 }
1466
1467
1468 void GLAPIENTRY
1469 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1470 {
1471    struct gl_texture_object *obj;
1472    GET_CURRENT_CONTEXT(ctx);
1473    ASSERT_OUTSIDE_BEGIN_END(ctx);
1474
1475    obj = get_texobj(ctx, target, GL_TRUE);
1476    if (!obj)
1477       return;
1478
1479    _mesa_lock_texture(ctx, obj);
1480    switch (pname) {
1481       case GL_TEXTURE_MAG_FILTER:
1482          *params = (GLint) obj->Sampler.MagFilter;
1483          break;
1484       case GL_TEXTURE_MIN_FILTER:
1485          *params = (GLint) obj->Sampler.MinFilter;
1486          break;
1487       case GL_TEXTURE_WRAP_S:
1488          *params = (GLint) obj->Sampler.WrapS;
1489          break;
1490       case GL_TEXTURE_WRAP_T:
1491          *params = (GLint) obj->Sampler.WrapT;
1492          break;
1493       case GL_TEXTURE_WRAP_R:
1494          *params = (GLint) obj->Sampler.WrapR;
1495          break;
1496       case GL_TEXTURE_BORDER_COLOR:
1497          if (!_mesa_is_desktop_gl(ctx))
1498             goto invalid_pname;
1499
1500          {
1501             GLfloat b[4];
1502             b[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1503             b[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1504             b[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1505             b[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1506             params[0] = FLOAT_TO_INT(b[0]);
1507             params[1] = FLOAT_TO_INT(b[1]);
1508             params[2] = FLOAT_TO_INT(b[2]);
1509             params[3] = FLOAT_TO_INT(b[3]);
1510          }
1511          break;
1512       case GL_TEXTURE_RESIDENT:
1513          if (ctx->API != API_OPENGL)
1514             goto invalid_pname;
1515
1516          *params = 1;
1517          break;
1518       case GL_TEXTURE_PRIORITY:
1519          if (ctx->API != API_OPENGL)
1520             goto invalid_pname;
1521
1522          *params = FLOAT_TO_INT(obj->Priority);
1523          break;
1524       case GL_TEXTURE_MIN_LOD:
1525          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1526             goto invalid_pname;
1527
1528          *params = (GLint) obj->Sampler.MinLod;
1529          break;
1530       case GL_TEXTURE_MAX_LOD:
1531          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1532             goto invalid_pname;
1533
1534          *params = (GLint) obj->Sampler.MaxLod;
1535          break;
1536       case GL_TEXTURE_BASE_LEVEL:
1537          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1538             goto invalid_pname;
1539
1540          *params = obj->BaseLevel;
1541          break;
1542       case GL_TEXTURE_MAX_LEVEL:
1543          *params = obj->MaxLevel;
1544          break;
1545       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1546          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1547             goto invalid_pname;
1548          *params = (GLint) obj->Sampler.MaxAnisotropy;
1549          break;
1550       case GL_GENERATE_MIPMAP_SGIS:
1551          if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES)
1552             goto invalid_pname;
1553
1554          *params = (GLint) obj->GenerateMipmap;
1555          break;
1556       case GL_TEXTURE_COMPARE_MODE_ARB:
1557          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1558              && !_mesa_is_gles3(ctx))
1559             goto invalid_pname;
1560          *params = (GLint) obj->Sampler.CompareMode;
1561          break;
1562       case GL_TEXTURE_COMPARE_FUNC_ARB:
1563          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1564              && !_mesa_is_gles3(ctx))
1565             goto invalid_pname;
1566          *params = (GLint) obj->Sampler.CompareFunc;
1567          break;
1568       case GL_DEPTH_TEXTURE_MODE_ARB:
1569          if (ctx->API != API_OPENGL || !ctx->Extensions.ARB_depth_texture)
1570             goto invalid_pname;
1571          *params = (GLint) obj->DepthMode;
1572          break;
1573       case GL_TEXTURE_LOD_BIAS:
1574          if (ctx->API != API_OPENGL)
1575             goto invalid_pname;
1576
1577          *params = (GLint) obj->Sampler.LodBias;
1578          break;
1579       case GL_TEXTURE_CROP_RECT_OES:
1580          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1581             goto invalid_pname;
1582
1583          params[0] = obj->CropRect[0];
1584          params[1] = obj->CropRect[1];
1585          params[2] = obj->CropRect[2];
1586          params[3] = obj->CropRect[3];
1587          break;
1588       case GL_TEXTURE_SWIZZLE_R_EXT:
1589       case GL_TEXTURE_SWIZZLE_G_EXT:
1590       case GL_TEXTURE_SWIZZLE_B_EXT:
1591       case GL_TEXTURE_SWIZZLE_A_EXT:
1592          if ((!_mesa_is_desktop_gl(ctx)
1593               || !ctx->Extensions.EXT_texture_swizzle)
1594              && !_mesa_is_gles3(ctx))
1595             goto invalid_pname;
1596          *params = obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1597          break;
1598
1599       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1600          if ((!_mesa_is_desktop_gl(ctx)
1601               || !ctx->Extensions.EXT_texture_swizzle)
1602              && !_mesa_is_gles3(ctx))
1603             goto invalid_pname;
1604          COPY_4V(params, obj->Swizzle);
1605          break;
1606
1607       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1608          if (!_mesa_is_desktop_gl(ctx)
1609              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1610             goto invalid_pname;
1611          *params = (GLint) obj->Sampler.CubeMapSeamless;
1612          break;
1613
1614       case GL_TEXTURE_IMMUTABLE_FORMAT:
1615          if (!ctx->Extensions.ARB_texture_storage)
1616             goto invalid_pname;
1617          *params = (GLint) obj->Immutable;
1618          break;
1619
1620       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1621          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1622             goto invalid_pname;
1623          *params = obj->RequiredTextureImageUnits;
1624          break;
1625
1626       case GL_TEXTURE_SRGB_DECODE_EXT:
1627          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1628             goto invalid_pname;
1629          *params = obj->Sampler.sRGBDecode;
1630          break;
1631
1632       default:
1633          goto invalid_pname;
1634    }
1635
1636    /* no error if we get here */
1637    _mesa_unlock_texture(ctx, obj);
1638    return;
1639
1640 invalid_pname:
1641    _mesa_unlock_texture(ctx, obj);
1642    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
1643 }
1644
1645
1646 /** New in GL 3.0 */
1647 void GLAPIENTRY
1648 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1649 {
1650    struct gl_texture_object *texObj;
1651    GET_CURRENT_CONTEXT(ctx);
1652    ASSERT_OUTSIDE_BEGIN_END(ctx);
1653
1654    texObj = get_texobj(ctx, target, GL_TRUE);
1655    if (!texObj)
1656       return;
1657
1658    switch (pname) {
1659    case GL_TEXTURE_BORDER_COLOR:
1660       COPY_4V(params, texObj->Sampler.BorderColor.i);
1661       break;
1662    default:
1663       _mesa_GetTexParameteriv(target, pname, params);
1664    }
1665 }
1666
1667
1668 /** New in GL 3.0 */
1669 void GLAPIENTRY
1670 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1671 {
1672    struct gl_texture_object *texObj;
1673    GET_CURRENT_CONTEXT(ctx);
1674    ASSERT_OUTSIDE_BEGIN_END(ctx);
1675
1676    texObj = get_texobj(ctx, target, GL_TRUE);
1677    if (!texObj)
1678       return;
1679
1680    switch (pname) {
1681    case GL_TEXTURE_BORDER_COLOR:
1682       COPY_4V(params, texObj->Sampler.BorderColor.i);
1683       break;
1684    default:
1685       {
1686          GLint ip[4];
1687          _mesa_GetTexParameteriv(target, pname, ip);
1688          params[0] = ip[0];
1689          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1690              pname == GL_TEXTURE_CROP_RECT_OES) {
1691             params[1] = ip[1];
1692             params[2] = ip[2];
1693             params[3] = ip[3];
1694          }
1695       }
1696    }
1697 }