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    default:
 970       return GL_FALSE;
 971    }
 972 }
 973
 974
 975 static void
 976 get_tex_level_parameter_image(struct gl_context *ctx,
 977                               const struct gl_texture_object *texObj,
 978                               GLenum target, GLint level,
 979                               GLenum pname, GLint *params)
 980 {
 981    const struct gl_texture_image *img = NULL;
 982    gl_format texFormat;
 983
 984    img = _mesa_select_tex_image(ctx, texObj, target, level);
 985    if (!img || img->TexFormat == MESA_FORMAT_NONE) {
 986       /* undefined texture image */
 987       if (pname == GL_TEXTURE_COMPONENTS)
 988          *params = 1;
 989       else
 990          *params = 0;
 991       return;
 992    }
 993
 994    texFormat = img->TexFormat;
 995
 996    switch (pname) {
 997       case GL_TEXTURE_WIDTH:
 998          *params = img->Width;
 999          break;
1000       case GL_TEXTURE_HEIGHT:
1001          *params = img->Height;
1002          break;
1003       case GL_TEXTURE_DEPTH:
1004          *params = img->Depth;
1005          break;
1006       case GL_TEXTURE_INTERNAL_FORMAT:
1007          if (_mesa_is_format_compressed(texFormat)) {
1008             /* need to return the actual compressed format */
1009             *params = _mesa_compressed_format_to_glenum(ctx, texFormat);
1010          }
1011          else {
1012             /* If the true internal format is not compressed but the user
1013              * requested a generic compressed format, we have to return the
1014              * generic base format that matches.
1015              *
1016              * From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
1017              *
1018              *     "If no specific compressed format is available,
1019              *     internalformat is instead replaced by the corresponding base
1020              *     internal format."
1021              *
1022              * Otherwise just return the user's requested internal format
1023              */
1024             const GLenum f =
1025                _mesa_gl_compressed_format_base_format(img->InternalFormat);
1026
1027             *params = (f != 0) ? f : img->InternalFormat;
1028          }
1029          break;
1030       case GL_TEXTURE_BORDER:
1031          *params = img->Border;
1032          break;
1033       case GL_TEXTURE_RED_SIZE:
1034       case GL_TEXTURE_GREEN_SIZE:
1035       case GL_TEXTURE_BLUE_SIZE:
1036       case GL_TEXTURE_ALPHA_SIZE:
1037          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1038             *params = _mesa_get_format_bits(texFormat, pname);
1039          else
1040             *params = 0;
1041          break;
1042       case GL_TEXTURE_INTENSITY_SIZE:
1043       case GL_TEXTURE_LUMINANCE_SIZE:
1044          if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
1045             *params = _mesa_get_format_bits(texFormat, pname);
1046             if (*params == 0) {
1047                /* intensity or luminance is probably stored as RGB[A] */
1048                *params = MIN2(_mesa_get_format_bits(texFormat,
1049                                                     GL_TEXTURE_RED_SIZE),
1050                               _mesa_get_format_bits(texFormat,
1051                                                     GL_TEXTURE_GREEN_SIZE));
1052             }
1053          }
1054          else {
1055             *params = 0;
1056          }
1057          break;
1058       case GL_TEXTURE_DEPTH_SIZE_ARB:
1059          if (!ctx->Extensions.ARB_depth_texture)
1060             goto invalid_pname;
1061          *params = _mesa_get_format_bits(texFormat, pname);
1062          break;
1063       case GL_TEXTURE_STENCIL_SIZE_EXT:
1064          if (!ctx->Extensions.EXT_packed_depth_stencil &&
1065              !ctx->Extensions.ARB_framebuffer_object)
1066             goto invalid_pname;
1067          *params = _mesa_get_format_bits(texFormat, pname);
1068          break;
1069       case GL_TEXTURE_SHARED_SIZE:
1070          if (ctx->Version < 30 &&
1071              !ctx->Extensions.EXT_texture_shared_exponent)
1072             goto invalid_pname;
1073          *params = texFormat == MESA_FORMAT_RGB9_E5_FLOAT ? 5 : 0;
1074          break;
1075
1076       /* GL_ARB_texture_compression */
1077       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1078          if (_mesa_is_format_compressed(texFormat) &&
1079              !_mesa_is_proxy_texture(target)) {
1080             *params = _mesa_format_image_size(texFormat, img->Width,
1081                                               img->Height, img->Depth);
1082          }
1083          else {
1084             _mesa_error(ctx, GL_INVALID_OPERATION,
1085                         "glGetTexLevelParameter[if]v(pname)");
1086          }
1087          break;
1088       case GL_TEXTURE_COMPRESSED:
1089          *params = (GLint) _mesa_is_format_compressed(texFormat);
1090          break;
1091
1092       /* GL_ARB_texture_float */
1093       case GL_TEXTURE_RED_TYPE_ARB:
1094       case GL_TEXTURE_GREEN_TYPE_ARB:
1095       case GL_TEXTURE_BLUE_TYPE_ARB:
1096       case GL_TEXTURE_ALPHA_TYPE_ARB:
1097       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1098       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1099       case GL_TEXTURE_DEPTH_TYPE_ARB:
1100          if (!ctx->Extensions.ARB_texture_float)
1101             goto invalid_pname;
1102          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1103             *params = _mesa_get_format_datatype(texFormat);
1104          else
1105             *params = GL_NONE;
1106          break;
1107
1108       default:
1109          goto invalid_pname;
1110    }
1111
1112    /* no error if we get here */
1113    return;
1114
1115 invalid_pname:
1116    _mesa_error(ctx, GL_INVALID_ENUM,
1117                "glGetTexLevelParameter[if]v(pname=%s)",
1118                _mesa_lookup_enum_by_nr(pname));
1119 }
1120
1121
1122 static void
1123 get_tex_level_parameter_buffer(struct gl_context *ctx,
1124                                const struct gl_texture_object *texObj,
1125                                GLenum pname, GLint *params)
1126 {
1127    const struct gl_buffer_object *bo = texObj->BufferObject;
1128    gl_format texFormat = texObj->_BufferObjectFormat;
1129    GLenum internalFormat = texObj->BufferObjectFormat;
1130    GLenum baseFormat = _mesa_get_format_base_format(texFormat);
1131
1132    if (!bo) {
1133       /* undefined texture buffer object */
1134       *params = pname == GL_TEXTURE_COMPONENTS ? 1 : 0;
1135       return;
1136    }
1137
1138    switch (pname) {
1139       case GL_TEXTURE_BUFFER_DATA_STORE_BINDING:
1140          *params = bo->Name;
1141          break;
1142       case GL_TEXTURE_WIDTH:
1143          *params = bo->Size;
1144          break;
1145       case GL_TEXTURE_HEIGHT:
1146       case GL_TEXTURE_DEPTH:
1147       case GL_TEXTURE_BORDER:
1148       case GL_TEXTURE_SHARED_SIZE:
1149       case GL_TEXTURE_COMPRESSED:
1150          *params = 0;
1151          break;
1152       case GL_TEXTURE_INTERNAL_FORMAT:
1153          *params = internalFormat;
1154          break;
1155       case GL_TEXTURE_RED_SIZE:
1156       case GL_TEXTURE_GREEN_SIZE:
1157       case GL_TEXTURE_BLUE_SIZE:
1158       case GL_TEXTURE_ALPHA_SIZE:
1159          if (_mesa_base_format_has_channel(baseFormat, pname))
1160             *params = _mesa_get_format_bits(texFormat, pname);
1161          else
1162             *params = 0;
1163          break;
1164       case GL_TEXTURE_INTENSITY_SIZE:
1165       case GL_TEXTURE_LUMINANCE_SIZE:
1166          if (_mesa_base_format_has_channel(baseFormat, pname)) {
1167             *params = _mesa_get_format_bits(texFormat, pname);
1168             if (*params == 0) {
1169                /* intensity or luminance is probably stored as RGB[A] */
1170                *params = MIN2(_mesa_get_format_bits(texFormat,
1171                                                     GL_TEXTURE_RED_SIZE),
1172                               _mesa_get_format_bits(texFormat,
1173                                                     GL_TEXTURE_GREEN_SIZE));
1174             }
1175          } else {
1176             *params = 0;
1177          }
1178          break;
1179       case GL_TEXTURE_DEPTH_SIZE_ARB:
1180       case GL_TEXTURE_STENCIL_SIZE_EXT:
1181          *params = _mesa_get_format_bits(texFormat, pname);
1182          break;
1183
1184       /* GL_ARB_texture_buffer_range */
1185       case GL_TEXTURE_BUFFER_OFFSET:
1186          if (!ctx->Extensions.ARB_texture_buffer_range)
1187             goto invalid_pname;
1188          *params = texObj->BufferOffset;
1189          break;
1190       case GL_TEXTURE_BUFFER_SIZE:
1191          if (!ctx->Extensions.ARB_texture_buffer_range)
1192             goto invalid_pname;
1193          *params = (texObj->BufferSize == -1) ? bo->Size : texObj->BufferSize;
1194          break;
1195
1196       /* GL_ARB_texture_compression */
1197       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1198          /* Always illegal for GL_TEXTURE_BUFFER */
1199          _mesa_error(ctx, GL_INVALID_OPERATION,
1200                      "glGetTexLevelParameter[if]v(pname)");
1201          break;
1202
1203       /* GL_ARB_texture_float */
1204       case GL_TEXTURE_RED_TYPE_ARB:
1205       case GL_TEXTURE_GREEN_TYPE_ARB:
1206       case GL_TEXTURE_BLUE_TYPE_ARB:
1207       case GL_TEXTURE_ALPHA_TYPE_ARB:
1208       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1209       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1210       case GL_TEXTURE_DEPTH_TYPE_ARB:
1211          if (!ctx->Extensions.ARB_texture_float)
1212             goto invalid_pname;
1213          if (_mesa_base_format_has_channel(baseFormat, pname))
1214             *params = _mesa_get_format_datatype(texFormat);
1215          else
1216             *params = GL_NONE;
1217          break;
1218
1219       default:
1220          goto invalid_pname;
1221    }
1222
1223    /* no error if we get here */
1224    return;
1225
1226 invalid_pname:
1227    _mesa_error(ctx, GL_INVALID_ENUM,
1228                "glGetTexLevelParameter[if]v(pname=%s)",
1229                _mesa_lookup_enum_by_nr(pname));
1230 }
1231
1232
1233 void GLAPIENTRY
1234 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
1235                               GLenum pname, GLfloat *params )
1236 {
1237    GLint iparam;
1238    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
1239    *params = (GLfloat) iparam;
1240 }
1241
1242
1243 void GLAPIENTRY
1244 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
1245                               GLenum pname, GLint *params )
1246 {
1247    const struct gl_texture_unit *texUnit;
1248    struct gl_texture_object *texObj;
1249    GLint maxLevels;
1250    GET_CURRENT_CONTEXT(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
1289    obj = get_texobj(ctx, target, GL_TRUE);
1290    if (!obj)
1291       return;
1292
1293    _mesa_lock_texture(ctx, obj);
1294    switch (pname) {
1295       case GL_TEXTURE_MAG_FILTER:
1296          *params = ENUM_TO_FLOAT(obj->Sampler.MagFilter);
1297          break;
1298       case GL_TEXTURE_MIN_FILTER:
1299          *params = ENUM_TO_FLOAT(obj->Sampler.MinFilter);
1300          break;
1301       case GL_TEXTURE_WRAP_S:
1302          *params = ENUM_TO_FLOAT(obj->Sampler.WrapS);
1303          break;
1304       case GL_TEXTURE_WRAP_T:
1305          *params = ENUM_TO_FLOAT(obj->Sampler.WrapT);
1306          break;
1307       case GL_TEXTURE_WRAP_R:
1308          *params = ENUM_TO_FLOAT(obj->Sampler.WrapR);
1309          break;
1310       case GL_TEXTURE_BORDER_COLOR:
1311          if (!_mesa_is_desktop_gl(ctx))
1312             goto invalid_pname;
1313
1314          if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
1315             _mesa_update_state_locked(ctx);
1316          if (ctx->Color._ClampFragmentColor) {
1317             params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1318             params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1319             params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1320             params[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1321          }
1322          else {
1323             params[0] = obj->Sampler.BorderColor.f[0];
1324             params[1] = obj->Sampler.BorderColor.f[1];
1325             params[2] = obj->Sampler.BorderColor.f[2];
1326             params[3] = obj->Sampler.BorderColor.f[3];
1327          }
1328          break;
1329       case GL_TEXTURE_RESIDENT:
1330          if (ctx->API != API_OPENGL_COMPAT)
1331             goto invalid_pname;
1332
1333          *params = 1.0F;
1334          break;
1335       case GL_TEXTURE_PRIORITY:
1336          if (ctx->API != API_OPENGL_COMPAT)
1337             goto invalid_pname;
1338
1339          *params = obj->Priority;
1340          break;
1341       case GL_TEXTURE_MIN_LOD:
1342          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1343             goto invalid_pname;
1344
1345          *params = obj->Sampler.MinLod;
1346          break;
1347       case GL_TEXTURE_MAX_LOD:
1348          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1349             goto invalid_pname;
1350
1351          *params = obj->Sampler.MaxLod;
1352          break;
1353       case GL_TEXTURE_BASE_LEVEL:
1354          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1355             goto invalid_pname;
1356
1357          *params = (GLfloat) obj->BaseLevel;
1358          break;
1359       case GL_TEXTURE_MAX_LEVEL:
1360          *params = (GLfloat) obj->MaxLevel;
1361          break;
1362       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1363          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1364             goto invalid_pname;
1365          *params = obj->Sampler.MaxAnisotropy;
1366          break;
1367       case GL_GENERATE_MIPMAP_SGIS:
1368          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1369             goto invalid_pname;
1370
1371          *params = (GLfloat) obj->GenerateMipmap;
1372          break;
1373       case GL_TEXTURE_COMPARE_MODE_ARB:
1374          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1375              && !_mesa_is_gles3(ctx))
1376             goto invalid_pname;
1377          *params = (GLfloat) obj->Sampler.CompareMode;
1378          break;
1379       case GL_TEXTURE_COMPARE_FUNC_ARB:
1380          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1381              && !_mesa_is_gles3(ctx))
1382             goto invalid_pname;
1383          *params = (GLfloat) obj->Sampler.CompareFunc;
1384          break;
1385       case GL_DEPTH_TEXTURE_MODE_ARB:
1386          /* GL_DEPTH_TEXTURE_MODE_ARB is removed in core-profile and it has
1387           * never existed in OpenGL ES.
1388           */
1389          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1390             goto invalid_pname;
1391          *params = (GLfloat) obj->DepthMode;
1392          break;
1393       case GL_TEXTURE_LOD_BIAS:
1394          if (ctx->API != API_OPENGL_COMPAT)
1395             goto invalid_pname;
1396
1397          *params = obj->Sampler.LodBias;
1398          break;
1399       case GL_TEXTURE_CROP_RECT_OES:
1400          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1401             goto invalid_pname;
1402
1403          params[0] = (GLfloat) obj->CropRect[0];
1404          params[1] = (GLfloat) obj->CropRect[1];
1405          params[2] = (GLfloat) obj->CropRect[2];
1406          params[3] = (GLfloat) obj->CropRect[3];
1407          break;
1408
1409       case GL_TEXTURE_SWIZZLE_R_EXT:
1410       case GL_TEXTURE_SWIZZLE_G_EXT:
1411       case GL_TEXTURE_SWIZZLE_B_EXT:
1412       case GL_TEXTURE_SWIZZLE_A_EXT:
1413          if ((!_mesa_is_desktop_gl(ctx)
1414               || !ctx->Extensions.EXT_texture_swizzle)
1415              && !_mesa_is_gles3(ctx))
1416             goto invalid_pname;
1417          *params = (GLfloat) obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1418          break;
1419
1420       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1421          if ((!_mesa_is_desktop_gl(ctx)
1422               || !ctx->Extensions.EXT_texture_swizzle)
1423              && !_mesa_is_gles3(ctx)) {
1424             goto invalid_pname;
1425          }
1426          else {
1427             GLuint comp;
1428             for (comp = 0; comp < 4; comp++) {
1429                params[comp] = (GLfloat) obj->Swizzle[comp];
1430             }
1431          }
1432          break;
1433
1434       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1435          if (!_mesa_is_desktop_gl(ctx)
1436              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1437             goto invalid_pname;
1438          *params = (GLfloat) obj->Sampler.CubeMapSeamless;
1439          break;
1440
1441       case GL_TEXTURE_IMMUTABLE_FORMAT:
1442          if (!ctx->Extensions.ARB_texture_storage)
1443             goto invalid_pname;
1444          *params = (GLfloat) obj->Immutable;
1445          break;
1446
1447       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1448          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1449             goto invalid_pname;
1450          *params = obj->RequiredTextureImageUnits;
1451          break;
1452
1453       case GL_TEXTURE_SRGB_DECODE_EXT:
1454          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1455             goto invalid_pname;
1456          *params = (GLfloat) obj->Sampler.sRGBDecode;
1457          break;
1458
1459       default:
1460          goto invalid_pname;
1461    }
1462
1463    /* no error if we get here */
1464    _mesa_unlock_texture(ctx, obj);
1465    return;
1466
1467 invalid_pname:
1468    _mesa_unlock_texture(ctx, obj);
1469    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname);
1470 }
1471
1472
1473 void GLAPIENTRY
1474 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1475 {
1476    struct gl_texture_object *obj;
1477    GET_CURRENT_CONTEXT(ctx);
1478
1479    obj = get_texobj(ctx, target, GL_TRUE);
1480    if (!obj)
1481       return;
1482
1483    _mesa_lock_texture(ctx, obj);
1484    switch (pname) {
1485       case GL_TEXTURE_MAG_FILTER:
1486          *params = (GLint) obj->Sampler.MagFilter;
1487          break;
1488       case GL_TEXTURE_MIN_FILTER:
1489          *params = (GLint) obj->Sampler.MinFilter;
1490          break;
1491       case GL_TEXTURE_WRAP_S:
1492          *params = (GLint) obj->Sampler.WrapS;
1493          break;
1494       case GL_TEXTURE_WRAP_T:
1495          *params = (GLint) obj->Sampler.WrapT;
1496          break;
1497       case GL_TEXTURE_WRAP_R:
1498          *params = (GLint) obj->Sampler.WrapR;
1499          break;
1500       case GL_TEXTURE_BORDER_COLOR:
1501          if (!_mesa_is_desktop_gl(ctx))
1502             goto invalid_pname;
1503
1504          {
1505             GLfloat b[4];
1506             b[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1507             b[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1508             b[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1509             b[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1510             params[0] = FLOAT_TO_INT(b[0]);
1511             params[1] = FLOAT_TO_INT(b[1]);
1512             params[2] = FLOAT_TO_INT(b[2]);
1513             params[3] = FLOAT_TO_INT(b[3]);
1514          }
1515          break;
1516       case GL_TEXTURE_RESIDENT:
1517          if (ctx->API != API_OPENGL_COMPAT)
1518             goto invalid_pname;
1519
1520          *params = 1;
1521          break;
1522       case GL_TEXTURE_PRIORITY:
1523          if (ctx->API != API_OPENGL_COMPAT)
1524             goto invalid_pname;
1525
1526          *params = FLOAT_TO_INT(obj->Priority);
1527          break;
1528       case GL_TEXTURE_MIN_LOD:
1529          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1530             goto invalid_pname;
1531
1532          *params = (GLint) obj->Sampler.MinLod;
1533          break;
1534       case GL_TEXTURE_MAX_LOD:
1535          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1536             goto invalid_pname;
1537
1538          *params = (GLint) obj->Sampler.MaxLod;
1539          break;
1540       case GL_TEXTURE_BASE_LEVEL:
1541          if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
1542             goto invalid_pname;
1543
1544          *params = obj->BaseLevel;
1545          break;
1546       case GL_TEXTURE_MAX_LEVEL:
1547          *params = obj->MaxLevel;
1548          break;
1549       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1550          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1551             goto invalid_pname;
1552          *params = (GLint) obj->Sampler.MaxAnisotropy;
1553          break;
1554       case GL_GENERATE_MIPMAP_SGIS:
1555          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
1556             goto invalid_pname;
1557
1558          *params = (GLint) obj->GenerateMipmap;
1559          break;
1560       case GL_TEXTURE_COMPARE_MODE_ARB:
1561          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1562              && !_mesa_is_gles3(ctx))
1563             goto invalid_pname;
1564          *params = (GLint) obj->Sampler.CompareMode;
1565          break;
1566       case GL_TEXTURE_COMPARE_FUNC_ARB:
1567          if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_shadow)
1568              && !_mesa_is_gles3(ctx))
1569             goto invalid_pname;
1570          *params = (GLint) obj->Sampler.CompareFunc;
1571          break;
1572       case GL_DEPTH_TEXTURE_MODE_ARB:
1573          if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.ARB_depth_texture)
1574             goto invalid_pname;
1575          *params = (GLint) obj->DepthMode;
1576          break;
1577       case GL_TEXTURE_LOD_BIAS:
1578          if (ctx->API != API_OPENGL_COMPAT)
1579             goto invalid_pname;
1580
1581          *params = (GLint) obj->Sampler.LodBias;
1582          break;
1583       case GL_TEXTURE_CROP_RECT_OES:
1584          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
1585             goto invalid_pname;
1586
1587          params[0] = obj->CropRect[0];
1588          params[1] = obj->CropRect[1];
1589          params[2] = obj->CropRect[2];
1590          params[3] = obj->CropRect[3];
1591          break;
1592       case GL_TEXTURE_SWIZZLE_R_EXT:
1593       case GL_TEXTURE_SWIZZLE_G_EXT:
1594       case GL_TEXTURE_SWIZZLE_B_EXT:
1595       case GL_TEXTURE_SWIZZLE_A_EXT:
1596          if ((!_mesa_is_desktop_gl(ctx)
1597               || !ctx->Extensions.EXT_texture_swizzle)
1598              && !_mesa_is_gles3(ctx))
1599             goto invalid_pname;
1600          *params = obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1601          break;
1602
1603       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1604          if ((!_mesa_is_desktop_gl(ctx)
1605               || !ctx->Extensions.EXT_texture_swizzle)
1606              && !_mesa_is_gles3(ctx))
1607             goto invalid_pname;
1608          COPY_4V(params, obj->Swizzle);
1609          break;
1610
1611       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1612          if (!_mesa_is_desktop_gl(ctx)
1613              || !ctx->Extensions.AMD_seamless_cubemap_per_texture)
1614             goto invalid_pname;
1615          *params = (GLint) obj->Sampler.CubeMapSeamless;
1616          break;
1617
1618       case GL_TEXTURE_IMMUTABLE_FORMAT:
1619          if (!ctx->Extensions.ARB_texture_storage)
1620             goto invalid_pname;
1621          *params = (GLint) obj->Immutable;
1622          break;
1623
1624       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1625          if (!_mesa_is_gles(ctx) || !ctx->Extensions.OES_EGL_image_external)
1626             goto invalid_pname;
1627          *params = obj->RequiredTextureImageUnits;
1628          break;
1629
1630       case GL_TEXTURE_SRGB_DECODE_EXT:
1631          if (!ctx->Extensions.EXT_texture_sRGB_decode)
1632             goto invalid_pname;
1633          *params = obj->Sampler.sRGBDecode;
1634          break;
1635
1636       default:
1637          goto invalid_pname;
1638    }
1639
1640    /* no error if we get here */
1641    _mesa_unlock_texture(ctx, obj);
1642    return;
1643
1644 invalid_pname:
1645    _mesa_unlock_texture(ctx, obj);
1646    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
1647 }
1648
1649
1650 /** New in GL 3.0 */
1651 void GLAPIENTRY
1652 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1653 {
1654    struct gl_texture_object *texObj;
1655    GET_CURRENT_CONTEXT(ctx);
1656
1657    texObj = get_texobj(ctx, target, GL_TRUE);
1658    if (!texObj)
1659       return;
1660
1661    switch (pname) {
1662    case GL_TEXTURE_BORDER_COLOR:
1663       COPY_4V(params, texObj->Sampler.BorderColor.i);
1664       break;
1665    default:
1666       _mesa_GetTexParameteriv(target, pname, params);
1667    }
1668 }
1669
1670
1671 /** New in GL 3.0 */
1672 void GLAPIENTRY
1673 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1674 {
1675    struct gl_texture_object *texObj;
1676    GET_CURRENT_CONTEXT(ctx);
1677
1678    texObj = get_texobj(ctx, target, GL_TRUE);
1679    if (!texObj)
1680       return;
1681
1682    switch (pname) {
1683    case GL_TEXTURE_BORDER_COLOR:
1684       COPY_4V(params, texObj->Sampler.BorderColor.i);
1685       break;
1686    default:
1687       {
1688          GLint ip[4];
1689          _mesa_GetTexParameteriv(target, pname, ip);
1690          params[0] = ip[0];
1691          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1692              pname == GL_TEXTURE_CROP_RECT_OES) {
1693             params[1] = ip[1];
1694             params[2] = ip[2];
1695             params[3] = ip[3];
1696          }
1697       }
1698    }
1699 }