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