src/mesa/main/texparam.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.5
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file texparam.c
  28  *
  29  * glTexParameter-related functions
  30  */
  31
  32
  33 #include "main/glheader.h"
  34 #include "main/colormac.h"
  35 #include "main/context.h"
  36 #include "main/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
  60    if (target == GL_TEXTURE_RECTANGLE_NV) {
  61       if (wrap == GL_CLAMP || wrap == GL_CLAMP_TO_EDGE ||
  62           (wrap == GL_CLAMP_TO_BORDER && e->ARB_texture_border_clamp))
  63          return GL_TRUE;
  64    }
  65    else if (target == GL_TEXTURE_EXTERNAL_OES) {
  66       if (wrap == GL_CLAMP_TO_EDGE)
  67          return GL_TRUE;
  68    }
  69    else {
  70       switch (wrap) {
  71       case GL_CLAMP:
  72       case GL_REPEAT:
  73       case GL_CLAMP_TO_EDGE:
  74       case GL_MIRRORED_REPEAT:
  75          return GL_TRUE;
  76       case GL_CLAMP_TO_BORDER:
  77          if (e->ARB_texture_border_clamp)
  78             return GL_TRUE;
  79          break;
  80       case GL_MIRROR_CLAMP_EXT:
  81       case GL_MIRROR_CLAMP_TO_EDGE_EXT:
  82          if (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)
  83             return GL_TRUE;
  84          break;
  85       case GL_MIRROR_CLAMP_TO_BORDER_EXT:
  86          if (e->EXT_texture_mirror_clamp)
  87             return GL_TRUE;
  88          break;
  89       default:
  90          break;
  91       }
  92    }
  93
  94    _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)", wrap );
  95    return GL_FALSE;
  96 }
  97
  98
  99 /**
 100  * Get current texture object for given target.
 101  * Return NULL if any error (and record the error).
 102  * Note that this is different from _mesa_select_tex_object() in that proxy
 103  * targets are not accepted.
 104  * Only the glGetTexLevelParameter() functions accept proxy targets.
 105  */
 106 static struct gl_texture_object *
 107 get_texobj(struct gl_context *ctx, GLenum target, GLboolean get)
 108 {
 109    struct gl_texture_unit *texUnit;
 110
 111    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
 112       _mesa_error(ctx, GL_INVALID_OPERATION,
 113                   "gl%sTexParameter(current unit)", get ? "Get" : "");
 114       return NULL;
 115    }
 116
 117    texUnit = _mesa_get_current_tex_unit(ctx);
 118
 119    switch (target) {
 120    case GL_TEXTURE_1D:
 121       return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 122    case GL_TEXTURE_2D:
 123       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 124    case GL_TEXTURE_3D:
 125       return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 126    case GL_TEXTURE_CUBE_MAP:
 127       if (ctx->Extensions.ARB_texture_cube_map) {
 128          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 129       }
 130       break;
 131    case GL_TEXTURE_RECTANGLE_NV:
 132       if (ctx->Extensions.NV_texture_rectangle) {
 133          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 134       }
 135       break;
 136    case GL_TEXTURE_1D_ARRAY_EXT:
 137       if (ctx->Extensions.MESA_texture_array ||
 138           ctx->Extensions.EXT_texture_array) {
 139          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 140       }
 141       break;
 142    case GL_TEXTURE_2D_ARRAY_EXT:
 143       if (ctx->Extensions.MESA_texture_array ||
 144           ctx->Extensions.EXT_texture_array) {
 145          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 146       }
 147       break;
 148    case GL_TEXTURE_EXTERNAL_OES:
 149       if (ctx->Extensions.OES_EGL_image_external) {
 150          return texUnit->CurrentTex[TEXTURE_EXTERNAL_INDEX];
 151       }
 152       break;
 153    default:
 154       ;
 155    }
 156
 157    _mesa_error(ctx, GL_INVALID_ENUM,
 158                   "gl%sTexParameter(target)", get ? "Get" : "");
 159    return NULL;
 160 }
 161
 162
 163 /**
 164  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 165  * \return -1 if error.
 166  */
 167 static GLint
 168 comp_to_swizzle(GLenum comp)
 169 {
 170    switch (comp) {
 171    case GL_RED:
 172       return SWIZZLE_X;
 173    case GL_GREEN:
 174       return SWIZZLE_Y;
 175    case GL_BLUE:
 176       return SWIZZLE_Z;
 177    case GL_ALPHA:
 178       return SWIZZLE_W;
 179    case GL_ZERO:
 180       return SWIZZLE_ZERO;
 181    case GL_ONE:
 182       return SWIZZLE_ONE;
 183    default:
 184       return -1;
 185    }
 186 }
 187
 188
 189 static void
 190 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 191 {
 192    ASSERT(comp < 4);
 193    ASSERT(swz <= SWIZZLE_NIL);
 194    {
 195       GLuint mask = 0x7 << (3 * comp);
 196       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 197       *swizzle = s;
 198    }
 199 }
 200
 201
 202 /**
 203  * This is called just prior to changing any texture object state which
 204  * will not effect texture completeness.
 205  */
 206 static inline void
 207 flush(struct gl_context *ctx)
 208 {
 209    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 210 }
 211
 212
 213 /**
 214  * This is called just prior to changing any texture object state which
 215  * can effect texture completeness (texture base level, max level).
 216  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 217  * state flag and then mark the texture object as 'incomplete' so that any
 218  * per-texture derived state gets recomputed.
 219  */
 220 static inline void
 221 incomplete(struct gl_context *ctx, struct gl_texture_object *texObj)
 222 {
 223    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 224    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
 225 }
 226
 227
 228 /**
 229  * Set an integer-valued texture parameter
 230  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 231  */
 232 static GLboolean
 233 set_tex_parameteri(struct gl_context *ctx,
 234                    struct gl_texture_object *texObj,
 235                    GLenum pname, const GLint *params)
 236 {
 237    switch (pname) {
 238    case GL_TEXTURE_MIN_FILTER:
 239       if (texObj->Sampler.MinFilter == params[0])
 240          return GL_FALSE;
 241       switch (params[0]) {
 242       case GL_NEAREST:
 243       case GL_LINEAR:
 244          flush(ctx);
 245          texObj->Sampler.MinFilter = params[0];
 246          return GL_TRUE;
 247       case GL_NEAREST_MIPMAP_NEAREST:
 248       case GL_LINEAR_MIPMAP_NEAREST:
 249       case GL_NEAREST_MIPMAP_LINEAR:
 250       case GL_LINEAR_MIPMAP_LINEAR:
 251          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV &&
 252              texObj->Target != GL_TEXTURE_EXTERNAL_OES) {
 253             flush(ctx);
 254             texObj->Sampler.MinFilter = params[0];
 255             return GL_TRUE;
 256          }
 257          /* fall-through */
 258       default:
 259          goto invalid_param;
 260       }
 261       return GL_FALSE;
 262
 263    case GL_TEXTURE_MAG_FILTER:
 264       if (texObj->Sampler.MagFilter == params[0])
 265          return GL_FALSE;
 266       switch (params[0]) {
 267       case GL_NEAREST:
 268       case GL_LINEAR:
 269          flush(ctx); /* does not effect completeness */
 270          texObj->Sampler.MagFilter = params[0];
 271          return GL_TRUE;
 272       default:
 273          goto invalid_param;
 274       }
 275       return GL_FALSE;
 276
 277    case GL_TEXTURE_WRAP_S:
 278       if (texObj->Sampler.WrapS == params[0])
 279          return GL_FALSE;
 280       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 281          flush(ctx);
 282          texObj->Sampler.WrapS = params[0];
 283          return GL_TRUE;
 284       }
 285       return GL_FALSE;
 286
 287    case GL_TEXTURE_WRAP_T:
 288       if (texObj->Sampler.WrapT == params[0])
 289          return GL_FALSE;
 290       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 291          flush(ctx);
 292          texObj->Sampler.WrapT = params[0];
 293          return GL_TRUE;
 294       }
 295       return GL_FALSE;
 296
 297    case GL_TEXTURE_WRAP_R:
 298       if (texObj->Sampler.WrapR == params[0])
 299          return GL_FALSE;
 300       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 301          flush(ctx);
 302          texObj->Sampler.WrapR = params[0];
 303          return GL_TRUE;
 304       }
 305       return GL_FALSE;
 306
 307    case GL_TEXTURE_BASE_LEVEL:
 308       if (texObj->BaseLevel == params[0])
 309          return GL_FALSE;
 310       if (params[0] < 0 ||
 311           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 312          _mesa_error(ctx, GL_INVALID_VALUE,
 313                      "glTexParameter(param=%d)", params[0]);
 314          return GL_FALSE;
 315       }
 316       incomplete(ctx, texObj);
 317       texObj->BaseLevel = params[0];
 318       return GL_TRUE;
 319
 320    case GL_TEXTURE_MAX_LEVEL:
 321       if (texObj->MaxLevel == params[0])
 322          return GL_FALSE;
 323       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 324          _mesa_error(ctx, GL_INVALID_OPERATION,
 325                      "glTexParameter(param=%d)", params[0]);
 326          return GL_FALSE;
 327       }
 328       incomplete(ctx, texObj);
 329       texObj->MaxLevel = params[0];
 330       return GL_TRUE;
 331
 332    case GL_GENERATE_MIPMAP_SGIS:
 333       if (params[0] && texObj->Target == GL_TEXTURE_EXTERNAL_OES)
 334          goto invalid_param;
 335       if (texObj->GenerateMipmap != params[0]) {
 336          /* no flush() */
 337          texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 338          return GL_TRUE;
 339       }
 340       return GL_FALSE;
 341
 342    case GL_TEXTURE_COMPARE_MODE_ARB:
 343       if (ctx->Extensions.ARB_shadow) {
 344          if (texObj->Sampler.CompareMode == params[0])
 345             return GL_FALSE;
 346          if (params[0] == GL_NONE ||
 347              params[0] == GL_COMPARE_R_TO_TEXTURE_ARB) {
 348             flush(ctx);
 349             texObj->Sampler.CompareMode = params[0];
 350             return GL_TRUE;
 351          }
 352          goto invalid_param;
 353       }
 354       goto invalid_pname;
 355
 356    case GL_TEXTURE_COMPARE_FUNC_ARB:
 357       if (ctx->Extensions.ARB_shadow) {
 358          if (texObj->Sampler.CompareFunc == params[0])
 359             return GL_FALSE;
 360          switch (params[0]) {
 361          case GL_LEQUAL:
 362          case GL_GEQUAL:
 363             flush(ctx);
 364             texObj->Sampler.CompareFunc = params[0];
 365             return GL_TRUE;
 366          case GL_EQUAL:
 367          case GL_NOTEQUAL:
 368          case GL_LESS:
 369          case GL_GREATER:
 370          case GL_ALWAYS:
 371          case GL_NEVER:
 372             if (ctx->Extensions.EXT_shadow_funcs) {
 373                flush(ctx);
 374                texObj->Sampler.CompareFunc = params[0];
 375                return GL_TRUE;
 376             }
 377             /* fall-through */
 378          default:
 379             goto invalid_param;
 380          }
 381       }
 382       goto invalid_pname;
 383
 384    case GL_DEPTH_TEXTURE_MODE_ARB:
 385       if (ctx->Extensions.ARB_depth_texture) {
 386          if (texObj->DepthMode == params[0])
 387             return GL_FALSE;
 388          if (params[0] == GL_LUMINANCE ||
 389              params[0] == GL_INTENSITY ||
 390              params[0] == GL_ALPHA ||
 391              (ctx->Extensions.ARB_texture_rg && params[0] == GL_RED)) {
 392             flush(ctx);
 393             texObj->DepthMode = params[0];
 394             return GL_TRUE;
 395          }
 396          goto invalid_param;
 397       }
 398       goto invalid_pname;
 399
 400 #if FEATURE_OES_draw_texture
 401    case GL_TEXTURE_CROP_RECT_OES:
 402       texObj->CropRect[0] = params[0];
 403       texObj->CropRect[1] = params[1];
 404       texObj->CropRect[2] = params[2];
 405       texObj->CropRect[3] = params[3];
 406       return GL_TRUE;
 407 #endif
 408
 409    case GL_TEXTURE_SWIZZLE_R_EXT:
 410    case GL_TEXTURE_SWIZZLE_G_EXT:
 411    case GL_TEXTURE_SWIZZLE_B_EXT:
 412    case GL_TEXTURE_SWIZZLE_A_EXT:
 413       if (ctx->Extensions.EXT_texture_swizzle) {
 414          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 415          const GLint swz = comp_to_swizzle(params[0]);
 416          if (swz < 0) {
 417             _mesa_error(ctx, GL_INVALID_OPERATION,
 418                         "glTexParameter(swizzle 0x%x)", params[0]);
 419             return GL_FALSE;
 420          }
 421          ASSERT(comp < 4);
 422
 423          flush(ctx);
 424          texObj->Swizzle[comp] = params[0];
 425          set_swizzle_component(&texObj->_Swizzle, comp, swz);
 426          return GL_TRUE;
 427       }
 428       goto invalid_pname;
 429
 430    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 431       if (ctx->Extensions.EXT_texture_swizzle) {
 432          GLuint comp;
 433          flush(ctx);
 434          for (comp = 0; comp < 4; comp++) {
 435             const GLint swz = comp_to_swizzle(params[comp]);
 436             if (swz >= 0) {
 437                texObj->Swizzle[comp] = params[comp];
 438                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 439             }
 440             else {
 441                _mesa_error(ctx, GL_INVALID_OPERATION,
 442                            "glTexParameter(swizzle 0x%x)", params[comp]);
 443                return GL_FALSE;
 444             }
 445          }
 446          return GL_TRUE;
 447       }
 448       goto invalid_pname;
 449
 450    case GL_TEXTURE_SRGB_DECODE_EXT:
 451       if (ctx->Extensions.EXT_texture_sRGB_decode) {
 452          GLenum decode = params[0];
 453          if (decode == GL_DECODE_EXT || decode == GL_SKIP_DECODE_EXT) {
 454             if (texObj->Sampler.sRGBDecode != decode) {
 455                flush(ctx);
 456                texObj->Sampler.sRGBDecode = decode;
 457             }
 458             return GL_TRUE;
 459          }
 460       }
 461       goto invalid_pname;
 462
 463    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 464       if (ctx->Extensions.AMD_seamless_cubemap_per_texture) {
 465          GLenum param = params[0];
 466          if (param != GL_TRUE && param != GL_FALSE) {
 467             goto invalid_param;
 468          }
 469          if (param != texObj->Sampler.CubeMapSeamless) {
 470             flush(ctx);
 471             texObj->Sampler.CubeMapSeamless = param;
 472          }
 473          return GL_TRUE;
 474       }
 475       goto invalid_pname;
 476
 477    default:
 478       goto invalid_pname;
 479    }
 480
 481 invalid_pname:
 482    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=%s)",
 483                _mesa_lookup_enum_by_nr(pname));
 484    return GL_FALSE;
 485
 486 invalid_param:
 487    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param=%s)",
 488                _mesa_lookup_enum_by_nr(params[0]));
 489    return GL_FALSE;
 490 }
 491
 492
 493 /**
 494  * Set a float-valued texture parameter
 495  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 496  */
 497 static GLboolean
 498 set_tex_parameterf(struct gl_context *ctx,
 499                    struct gl_texture_object *texObj,
 500                    GLenum pname, const GLfloat *params)
 501 {
 502    switch (pname) {
 503    case GL_TEXTURE_MIN_LOD:
 504       if (texObj->Sampler.MinLod == params[0])
 505          return GL_FALSE;
 506       flush(ctx);
 507       texObj->Sampler.MinLod = params[0];
 508       return GL_TRUE;
 509
 510    case GL_TEXTURE_MAX_LOD:
 511       if (texObj->Sampler.MaxLod == params[0])
 512          return GL_FALSE;
 513       flush(ctx);
 514       texObj->Sampler.MaxLod = params[0];
 515       return GL_TRUE;
 516
 517    case GL_TEXTURE_PRIORITY:
 518       flush(ctx);
 519       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 520       return GL_TRUE;
 521
 522    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 523       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 524          if (texObj->Sampler.MaxAnisotropy == params[0])
 525             return GL_FALSE;
 526          if (params[0] < 1.0) {
 527             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 528             return GL_FALSE;
 529          }
 530          flush(ctx);
 531          /* clamp to max, that's what NVIDIA does */
 532          texObj->Sampler.MaxAnisotropy = MIN2(params[0],
 533                                       ctx->Const.MaxTextureMaxAnisotropy);
 534          return GL_TRUE;
 535       }
 536       else {
 537          static GLuint count = 0;
 538          if (count++ < 10)
 539             _mesa_error(ctx, GL_INVALID_ENUM,
 540                         "glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)");
 541       }
 542       return GL_FALSE;
 543
 544    case GL_TEXTURE_LOD_BIAS:
 545       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias */
 546       if (texObj->Sampler.LodBias != params[0]) {
 547          flush(ctx);
 548          texObj->Sampler.LodBias = params[0];
 549          return GL_TRUE;
 550       }
 551       break;
 552
 553    case GL_TEXTURE_BORDER_COLOR:
 554       flush(ctx);
 555       /* ARB_texture_float disables clamping */
 556       if (ctx->Extensions.ARB_texture_float) {
 557          texObj->Sampler.BorderColor.f[RCOMP] = params[0];
 558          texObj->Sampler.BorderColor.f[GCOMP] = params[1];
 559          texObj->Sampler.BorderColor.f[BCOMP] = params[2];
 560          texObj->Sampler.BorderColor.f[ACOMP] = params[3];
 561       } else {
 562          texObj->Sampler.BorderColor.f[RCOMP] = CLAMP(params[0], 0.0F, 1.0F);
 563          texObj->Sampler.BorderColor.f[GCOMP] = CLAMP(params[1], 0.0F, 1.0F);
 564          texObj->Sampler.BorderColor.f[BCOMP] = CLAMP(params[2], 0.0F, 1.0F);
 565          texObj->Sampler.BorderColor.f[ACOMP] = CLAMP(params[3], 0.0F, 1.0F);
 566       }
 567       return GL_TRUE;
 568
 569    default:
 570       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 571    }
 572    return GL_FALSE;
 573 }
 574
 575
 576 void GLAPIENTRY
 577 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 578 {
 579    GLboolean need_update;
 580    struct gl_texture_object *texObj;
 581    GET_CURRENT_CONTEXT(ctx);
 582    ASSERT_OUTSIDE_BEGIN_END(ctx);
 583
 584    texObj = get_texobj(ctx, target, GL_FALSE);
 585    if (!texObj)
 586       return;
 587
 588    switch (pname) {
 589    case GL_TEXTURE_MIN_FILTER:
 590    case GL_TEXTURE_MAG_FILTER:
 591    case GL_TEXTURE_WRAP_S:
 592    case GL_TEXTURE_WRAP_T:
 593    case GL_TEXTURE_WRAP_R:
 594    case GL_TEXTURE_BASE_LEVEL:
 595    case GL_TEXTURE_MAX_LEVEL:
 596    case GL_GENERATE_MIPMAP_SGIS:
 597    case GL_TEXTURE_COMPARE_MODE_ARB:
 598    case GL_TEXTURE_COMPARE_FUNC_ARB:
 599    case GL_DEPTH_TEXTURE_MODE_ARB:
 600    case GL_TEXTURE_SRGB_DECODE_EXT:
 601    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 602       {
 603          /* convert float param to int */
 604          GLint p[4];
 605          p[0] = (GLint) param;
 606          p[1] = p[2] = p[3] = 0;
 607          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 608       }
 609       break;
 610    case GL_TEXTURE_SWIZZLE_R_EXT:
 611    case GL_TEXTURE_SWIZZLE_G_EXT:
 612    case GL_TEXTURE_SWIZZLE_B_EXT:
 613    case GL_TEXTURE_SWIZZLE_A_EXT:
 614       {
 615          GLint p[4];
 616          p[0] = (GLint) param;
 617          p[1] = p[2] = p[3] = 0;
 618          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 619       }
 620       break;
 621    default:
 622       {
 623          /* this will generate an error if pname is illegal */
 624          GLfloat p[4];
 625          p[0] = param;
 626          p[1] = p[2] = p[3] = 0.0F;
 627          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 628       }
 629    }
 630
 631    if (ctx->Driver.TexParameter && need_update) {
 632       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 633    }
 634 }
 635
 636
 637 void GLAPIENTRY
 638 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 639 {
 640    GLboolean need_update;
 641    struct gl_texture_object *texObj;
 642    GET_CURRENT_CONTEXT(ctx);
 643    ASSERT_OUTSIDE_BEGIN_END(ctx);
 644
 645    texObj = get_texobj(ctx, target, GL_FALSE);
 646    if (!texObj)
 647       return;
 648
 649    switch (pname) {
 650    case GL_TEXTURE_MIN_FILTER:
 651    case GL_TEXTURE_MAG_FILTER:
 652    case GL_TEXTURE_WRAP_S:
 653    case GL_TEXTURE_WRAP_T:
 654    case GL_TEXTURE_WRAP_R:
 655    case GL_TEXTURE_BASE_LEVEL:
 656    case GL_TEXTURE_MAX_LEVEL:
 657    case GL_GENERATE_MIPMAP_SGIS:
 658    case GL_TEXTURE_COMPARE_MODE_ARB:
 659    case GL_TEXTURE_COMPARE_FUNC_ARB:
 660    case GL_DEPTH_TEXTURE_MODE_ARB:
 661    case GL_TEXTURE_SRGB_DECODE_EXT:
 662    case GL_TEXTURE_CUBE_MAP_SEAMLESS:
 663       {
 664          /* convert float param to int */
 665          GLint p[4];
 666          p[0] = (GLint) params[0];
 667          p[1] = p[2] = p[3] = 0;
 668          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 669       }
 670       break;
 671
 672 #if FEATURE_OES_draw_texture
 673    case GL_TEXTURE_CROP_RECT_OES:
 674       {
 675          /* convert float params to int */
 676          GLint iparams[4];
 677          iparams[0] = (GLint) params[0];
 678          iparams[1] = (GLint) params[1];
 679          iparams[2] = (GLint) params[2];
 680          iparams[3] = (GLint) params[3];
 681          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 682       }
 683       break;
 684 #endif
 685
 686    case GL_TEXTURE_SWIZZLE_R_EXT:
 687    case GL_TEXTURE_SWIZZLE_G_EXT:
 688    case GL_TEXTURE_SWIZZLE_B_EXT:
 689    case GL_TEXTURE_SWIZZLE_A_EXT:
 690    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 691       {
 692          GLint p[4] = {0, 0, 0, 0};
 693          p[0] = (GLint) params[0];
 694          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT) {
 695             p[1] = (GLint) params[1];
 696             p[2] = (GLint) params[2];
 697             p[3] = (GLint) params[3];
 698          }
 699          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 700       }
 701       break;
 702    default:
 703       /* this will generate an error if pname is illegal */
 704       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 705    }
 706
 707    if (ctx->Driver.TexParameter && need_update) {
 708       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 709    }
 710 }
 711
 712
 713 void GLAPIENTRY
 714 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 715 {
 716    GLboolean need_update;
 717    struct gl_texture_object *texObj;
 718    GET_CURRENT_CONTEXT(ctx);
 719    ASSERT_OUTSIDE_BEGIN_END(ctx);
 720
 721    texObj = get_texobj(ctx, target, GL_FALSE);
 722    if (!texObj)
 723       return;
 724
 725    switch (pname) {
 726    case GL_TEXTURE_MIN_LOD:
 727    case GL_TEXTURE_MAX_LOD:
 728    case GL_TEXTURE_PRIORITY:
 729    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 730    case GL_TEXTURE_LOD_BIAS:
 731    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 732       {
 733          GLfloat fparam[4];
 734          fparam[0] = (GLfloat) param;
 735          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 736          /* convert int param to float */
 737          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 738       }
 739       break;
 740    default:
 741       /* this will generate an error if pname is illegal */
 742       {
 743          GLint iparam[4];
 744          iparam[0] = param;
 745          iparam[1] = iparam[2] = iparam[3] = 0;
 746          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 747       }
 748    }
 749
 750    if (ctx->Driver.TexParameter && need_update) {
 751       GLfloat fparam = (GLfloat) param;
 752       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 753    }
 754 }
 755
 756
 757 void GLAPIENTRY
 758 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 759 {
 760    GLboolean need_update;
 761    struct gl_texture_object *texObj;
 762    GET_CURRENT_CONTEXT(ctx);
 763    ASSERT_OUTSIDE_BEGIN_END(ctx);
 764
 765    texObj = get_texobj(ctx, target, GL_FALSE);
 766    if (!texObj)
 767       return;
 768
 769    switch (pname) {
 770    case GL_TEXTURE_BORDER_COLOR:
 771       {
 772          /* convert int params to float */
 773          GLfloat fparams[4];
 774          fparams[0] = INT_TO_FLOAT(params[0]);
 775          fparams[1] = INT_TO_FLOAT(params[1]);
 776          fparams[2] = INT_TO_FLOAT(params[2]);
 777          fparams[3] = INT_TO_FLOAT(params[3]);
 778          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 779       }
 780       break;
 781    case GL_TEXTURE_MIN_LOD:
 782    case GL_TEXTURE_MAX_LOD:
 783    case GL_TEXTURE_PRIORITY:
 784    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 785    case GL_TEXTURE_LOD_BIAS:
 786    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 787       {
 788          /* convert int param to float */
 789          GLfloat fparams[4];
 790          fparams[0] = (GLfloat) params[0];
 791          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 792          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 793       }
 794       break;
 795    default:
 796       /* this will generate an error if pname is illegal */
 797       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 798    }
 799
 800    if (ctx->Driver.TexParameter && need_update) {
 801       GLfloat fparams[4];
 802       fparams[0] = INT_TO_FLOAT(params[0]);
 803       if (pname == GL_TEXTURE_BORDER_COLOR ||
 804           pname == GL_TEXTURE_CROP_RECT_OES) {
 805          fparams[1] = INT_TO_FLOAT(params[1]);
 806          fparams[2] = INT_TO_FLOAT(params[2]);
 807          fparams[3] = INT_TO_FLOAT(params[3]);
 808       }
 809       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 810    }
 811 }
 812
 813
 814 /**
 815  * Set tex parameter to integer value(s).  Primarily intended to set
 816  * integer-valued texture border color (for integer-valued textures).
 817  * New in GL 3.0.
 818  */
 819 void GLAPIENTRY
 820 _mesa_TexParameterIiv(GLenum target, GLenum pname, const GLint *params)
 821 {
 822    struct gl_texture_object *texObj;
 823    GET_CURRENT_CONTEXT(ctx);
 824    ASSERT_OUTSIDE_BEGIN_END(ctx);
 825
 826    texObj = get_texobj(ctx, target, GL_FALSE);
 827    if (!texObj)
 828       return;
 829
 830    switch (pname) {
 831    case GL_TEXTURE_BORDER_COLOR:
 832       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 833       /* set the integer-valued border color */
 834       COPY_4V(texObj->Sampler.BorderColor.i, params);
 835       break;
 836    default:
 837       _mesa_TexParameteriv(target, pname, params);
 838       break;
 839    }
 840    /* XXX no driver hook for TexParameterIiv() yet */
 841 }
 842
 843
 844 /**
 845  * Set tex parameter to unsigned integer value(s).  Primarily intended to set
 846  * uint-valued texture border color (for integer-valued textures).
 847  * New in GL 3.0
 848  */
 849 void GLAPIENTRY
 850 _mesa_TexParameterIuiv(GLenum target, GLenum pname, const GLuint *params)
 851 {
 852    struct gl_texture_object *texObj;
 853    GET_CURRENT_CONTEXT(ctx);
 854    ASSERT_OUTSIDE_BEGIN_END(ctx);
 855
 856    texObj = get_texobj(ctx, target, GL_FALSE);
 857    if (!texObj)
 858       return;
 859
 860    switch (pname) {
 861    case GL_TEXTURE_BORDER_COLOR:
 862       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 863       /* set the unsigned integer-valued border color */
 864       COPY_4V(texObj->Sampler.BorderColor.ui, params);
 865       break;
 866    default:
 867       _mesa_TexParameteriv(target, pname, (const GLint *) params);
 868       break;
 869    }
 870    /* XXX no driver hook for TexParameterIuiv() yet */
 871 }
 872
 873
 874 static GLboolean
 875 legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target)
 876 {
 877    switch (target) {
 878    case GL_TEXTURE_1D:
 879    case GL_PROXY_TEXTURE_1D:
 880    case GL_TEXTURE_2D:
 881    case GL_PROXY_TEXTURE_2D:
 882    case GL_TEXTURE_3D:
 883    case GL_PROXY_TEXTURE_3D:
 884       return GL_TRUE;
 885    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
 886    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
 887    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
 888    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
 889    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
 890    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
 891    case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
 892       return ctx->Extensions.ARB_texture_cube_map;
 893    case GL_TEXTURE_RECTANGLE_NV:
 894    case GL_PROXY_TEXTURE_RECTANGLE_NV:
 895       return ctx->Extensions.NV_texture_rectangle;
 896    case GL_TEXTURE_1D_ARRAY_EXT:
 897    case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
 898    case GL_TEXTURE_2D_ARRAY_EXT:
 899    case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
 900       return (ctx->Extensions.MESA_texture_array ||
 901               ctx->Extensions.EXT_texture_array);
 902    case GL_TEXTURE_BUFFER:
 903       /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
 904        * but not in earlier versions that expose ARB_texture_buffer_object.
 905        *
 906        * From the ARB_texture_buffer_object spec:
 907        * "(7) Do buffer textures support texture parameters (TexParameter) or
 908        *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
 909        *
 910        *    RESOLVED:  No. [...] Note that the spec edits above don't add
 911        *    explicit error language for any of these cases.  That is because
 912        *    each of the functions enumerate the set of valid <target>
 913        *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
 914        *    these cases means that target is not legal, and an INVALID_ENUM
 915        *    error should be generated."
 916        *
 917        * From the OpenGL 3.1 spec:
 918        * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
 919        */
 920       return _mesa_is_desktop_gl(ctx) && ctx->Version >= 31;
 921    default:
 922       return GL_FALSE;
 923    }
 924 }
 925
 926
 927 static void
 928 get_tex_level_parameter_image(struct gl_context *ctx,
 929                               struct gl_texture_object *texObj,
 930                               GLenum target, GLint level,
 931                               GLenum pname, GLint *params)
 932 {
 933    const struct gl_texture_image *img = NULL;
 934    gl_format texFormat;
 935
 936    img = _mesa_select_tex_image(ctx, texObj, target, level);
 937    if (!img || img->TexFormat == MESA_FORMAT_NONE) {
 938       /* undefined texture image */
 939       if (pname == GL_TEXTURE_COMPONENTS)
 940          *params = 1;
 941       else
 942          *params = 0;
 943       return;
 944    }
 945
 946    texFormat = img->TexFormat;
 947
 948    switch (pname) {
 949       case GL_TEXTURE_WIDTH:
 950          *params = img->Width;
 951          break;
 952       case GL_TEXTURE_HEIGHT:
 953          *params = img->Height;
 954          break;
 955       case GL_TEXTURE_DEPTH:
 956          *params = img->Depth;
 957          break;
 958       case GL_TEXTURE_INTERNAL_FORMAT:
 959          if (_mesa_is_format_compressed(texFormat)) {
 960             /* need to return the actual compressed format */
 961             *params = _mesa_compressed_format_to_glenum(ctx, texFormat);
 962          }
 963          else {
 964             /* If the true internal format is not compressed but the user
 965              * requested a generic compressed format, we have to return the
 966              * generic base format that matches.
 967              *
 968              * From page 119 (page 129 of the PDF) of the OpenGL 1.3 spec:
 969              *
 970              *     "If no specific compressed format is available,
 971              *     internalformat is instead replaced by the corresponding base
 972              *     internal format."
 973              *
 974              * Otherwise just return the user's requested internal format
 975              */
 976             const GLenum f =
 977                _mesa_gl_compressed_format_base_format(img->InternalFormat);
 978
 979             *params = (f != 0) ? f : img->InternalFormat;
 980          }
 981          break;
 982       case GL_TEXTURE_BORDER:
 983          *params = img->Border;
 984          break;
 985       case GL_TEXTURE_RED_SIZE:
 986       case GL_TEXTURE_GREEN_SIZE:
 987       case GL_TEXTURE_BLUE_SIZE:
 988       case GL_TEXTURE_ALPHA_SIZE:
 989          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
 990             *params = _mesa_get_format_bits(texFormat, pname);
 991          else
 992             *params = 0;
 993          break;
 994       case GL_TEXTURE_INTENSITY_SIZE:
 995       case GL_TEXTURE_LUMINANCE_SIZE:
 996          if (_mesa_base_format_has_channel(img->_BaseFormat, pname)) {
 997             *params = _mesa_get_format_bits(texFormat, pname);
 998             if (*params == 0) {
 999                /* intensity or luminance is probably stored as RGB[A] */
1000                *params = MIN2(_mesa_get_format_bits(texFormat,
1001                                                     GL_TEXTURE_RED_SIZE),
1002                               _mesa_get_format_bits(texFormat,
1003                                                     GL_TEXTURE_GREEN_SIZE));
1004             }
1005          }
1006          else {
1007             *params = 0;
1008          }
1009          break;
1010       case GL_TEXTURE_DEPTH_SIZE_ARB:
1011          if (!ctx->Extensions.ARB_depth_texture)
1012             goto invalid_pname;
1013          *params = _mesa_get_format_bits(texFormat, pname);
1014          break;
1015       case GL_TEXTURE_STENCIL_SIZE_EXT:
1016          if (!ctx->Extensions.EXT_packed_depth_stencil &&
1017              !ctx->Extensions.ARB_framebuffer_object)
1018             goto invalid_pname;
1019          *params = _mesa_get_format_bits(texFormat, pname);
1020          break;
1021       case GL_TEXTURE_SHARED_SIZE:
1022          if (ctx->Version < 30 &&
1023              !ctx->Extensions.EXT_texture_shared_exponent)
1024             goto invalid_pname;
1025          *params = texFormat == MESA_FORMAT_RGB9_E5_FLOAT ? 5 : 0;
1026          break;
1027
1028       /* GL_ARB_texture_compression */
1029       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1030          if (_mesa_is_format_compressed(texFormat) &&
1031              !_mesa_is_proxy_texture(target)) {
1032             *params = _mesa_format_image_size(texFormat, img->Width,
1033                                               img->Height, img->Depth);
1034          }
1035          else {
1036             _mesa_error(ctx, GL_INVALID_OPERATION,
1037                         "glGetTexLevelParameter[if]v(pname)");
1038          }
1039          break;
1040       case GL_TEXTURE_COMPRESSED:
1041          *params = (GLint) _mesa_is_format_compressed(texFormat);
1042          break;
1043
1044       /* GL_ARB_texture_float */
1045       case GL_TEXTURE_RED_TYPE_ARB:
1046       case GL_TEXTURE_GREEN_TYPE_ARB:
1047       case GL_TEXTURE_BLUE_TYPE_ARB:
1048       case GL_TEXTURE_ALPHA_TYPE_ARB:
1049       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1050       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1051       case GL_TEXTURE_DEPTH_TYPE_ARB:
1052          if (!ctx->Extensions.ARB_texture_float)
1053             goto invalid_pname;
1054          if (_mesa_base_format_has_channel(img->_BaseFormat, pname))
1055             *params = _mesa_get_format_datatype(texFormat);
1056          else
1057             *params = GL_NONE;
1058          break;
1059
1060       default:
1061          goto invalid_pname;
1062    }
1063
1064    /* no error if we get here */
1065    return;
1066
1067 invalid_pname:
1068    _mesa_error(ctx, GL_INVALID_ENUM,
1069                "glGetTexLevelParameter[if]v(pname=%s)",
1070                _mesa_lookup_enum_by_nr(pname));
1071 }
1072
1073
1074 static void
1075 get_tex_level_parameter_buffer(struct gl_context *ctx,
1076                                struct gl_texture_object *texObj,
1077                                GLenum target, GLint level,
1078                                GLenum pname, GLint *params)
1079 {
1080    struct gl_buffer_object *bo = texObj->BufferObject;
1081    gl_format texFormat = texObj->_BufferObjectFormat;
1082    GLenum internalFormat = texObj->BufferObjectFormat;
1083    GLenum baseFormat = _mesa_get_format_base_format(texFormat);
1084
1085    if (!bo) {
1086       /* undefined texture buffer object */
1087       *params = pname == GL_TEXTURE_COMPONENTS ? 1 : 0;
1088       return;
1089    }
1090
1091    switch (pname) {
1092       case GL_TEXTURE_BUFFER_DATA_STORE_BINDING:
1093          *params = bo->Name;
1094          break;
1095       case GL_TEXTURE_WIDTH:
1096          *params = bo->Size;
1097          break;
1098       case GL_TEXTURE_HEIGHT:
1099       case GL_TEXTURE_DEPTH:
1100       case GL_TEXTURE_BORDER:
1101       case GL_TEXTURE_SHARED_SIZE:
1102       case GL_TEXTURE_COMPRESSED:
1103          *params = 0;
1104          break;
1105       case GL_TEXTURE_INTERNAL_FORMAT:
1106          *params = internalFormat;
1107          break;
1108       case GL_TEXTURE_RED_SIZE:
1109       case GL_TEXTURE_GREEN_SIZE:
1110       case GL_TEXTURE_BLUE_SIZE:
1111       case GL_TEXTURE_ALPHA_SIZE:
1112          if (_mesa_base_format_has_channel(baseFormat, pname))
1113             *params = _mesa_get_format_bits(texFormat, pname);
1114          else
1115             *params = 0;
1116          break;
1117       case GL_TEXTURE_INTENSITY_SIZE:
1118       case GL_TEXTURE_LUMINANCE_SIZE:
1119          if (_mesa_base_format_has_channel(baseFormat, pname)) {
1120             *params = _mesa_get_format_bits(texFormat, pname);
1121             if (*params == 0) {
1122                /* intensity or luminance is probably stored as RGB[A] */
1123                *params = MIN2(_mesa_get_format_bits(texFormat,
1124                                                     GL_TEXTURE_RED_SIZE),
1125                               _mesa_get_format_bits(texFormat,
1126                                                     GL_TEXTURE_GREEN_SIZE));
1127             }
1128          } else {
1129             *params = 0;
1130          }
1131          break;
1132       case GL_TEXTURE_DEPTH_SIZE_ARB:
1133       case GL_TEXTURE_STENCIL_SIZE_EXT:
1134          *params = _mesa_get_format_bits(texFormat, pname);
1135          break;
1136
1137       /* GL_ARB_texture_compression */
1138       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
1139          /* Always illegal for GL_TEXTURE_BUFFER */
1140          _mesa_error(ctx, GL_INVALID_OPERATION,
1141                      "glGetTexLevelParameter[if]v(pname)");
1142          break;
1143
1144       /* GL_ARB_texture_float */
1145       case GL_TEXTURE_RED_TYPE_ARB:
1146       case GL_TEXTURE_GREEN_TYPE_ARB:
1147       case GL_TEXTURE_BLUE_TYPE_ARB:
1148       case GL_TEXTURE_ALPHA_TYPE_ARB:
1149       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
1150       case GL_TEXTURE_INTENSITY_TYPE_ARB:
1151       case GL_TEXTURE_DEPTH_TYPE_ARB:
1152          if (!ctx->Extensions.ARB_texture_float)
1153             goto invalid_pname;
1154          if (_mesa_base_format_has_channel(baseFormat, pname))
1155             *params = _mesa_get_format_datatype(texFormat);
1156          else
1157             *params = GL_NONE;
1158          break;
1159
1160       default:
1161          goto invalid_pname;
1162    }
1163
1164    /* no error if we get here */
1165    return;
1166
1167 invalid_pname:
1168    _mesa_error(ctx, GL_INVALID_ENUM,
1169                "glGetTexLevelParameter[if]v(pname=%s)",
1170                _mesa_lookup_enum_by_nr(pname));
1171 }
1172
1173
1174 void GLAPIENTRY
1175 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
1176                               GLenum pname, GLfloat *params )
1177 {
1178    GLint iparam;
1179    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
1180    *params = (GLfloat) iparam;
1181 }
1182
1183
1184 void GLAPIENTRY
1185 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
1186                               GLenum pname, GLint *params )
1187 {
1188    const struct gl_texture_unit *texUnit;
1189    struct gl_texture_object *texObj;
1190    GLint maxLevels;
1191    GET_CURRENT_CONTEXT(ctx);
1192    ASSERT_OUTSIDE_BEGIN_END(ctx);
1193
1194    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
1195       _mesa_error(ctx, GL_INVALID_OPERATION,
1196                   "glGetTexLevelParameteriv(current unit)");
1197       return;
1198    }
1199
1200    texUnit = _mesa_get_current_tex_unit(ctx);
1201
1202    if (!legal_get_tex_level_parameter_target(ctx, target)) {
1203       _mesa_error(ctx, GL_INVALID_ENUM,
1204                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
1205       return;
1206    }
1207
1208    maxLevels = _mesa_max_texture_levels(ctx, target);
1209    assert(maxLevels != 0);
1210
1211    if (level < 0 || level >= maxLevels) {
1212       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
1213       return;
1214    }
1215
1216    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1217
1218    if (target == GL_TEXTURE_BUFFER)
1219       get_tex_level_parameter_buffer(ctx, texObj, target, level, pname, params);
1220    else
1221       get_tex_level_parameter_image(ctx, texObj, target, level, pname, params);
1222 }
1223
1224
1225 void GLAPIENTRY
1226 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
1227 {
1228    struct gl_texture_object *obj;
1229    GET_CURRENT_CONTEXT(ctx);
1230    ASSERT_OUTSIDE_BEGIN_END(ctx);
1231
1232    obj = get_texobj(ctx, target, GL_TRUE);
1233    if (!obj)
1234       return;
1235
1236    _mesa_lock_texture(ctx, obj);
1237    switch (pname) {
1238       case GL_TEXTURE_MAG_FILTER:
1239          *params = ENUM_TO_FLOAT(obj->Sampler.MagFilter);
1240          break;
1241       case GL_TEXTURE_MIN_FILTER:
1242          *params = ENUM_TO_FLOAT(obj->Sampler.MinFilter);
1243          break;
1244       case GL_TEXTURE_WRAP_S:
1245          *params = ENUM_TO_FLOAT(obj->Sampler.WrapS);
1246          break;
1247       case GL_TEXTURE_WRAP_T:
1248          *params = ENUM_TO_FLOAT(obj->Sampler.WrapT);
1249          break;
1250       case GL_TEXTURE_WRAP_R:
1251          *params = ENUM_TO_FLOAT(obj->Sampler.WrapR);
1252          break;
1253       case GL_TEXTURE_BORDER_COLOR:
1254          if (ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP))
1255             _mesa_update_state_locked(ctx);
1256          if (ctx->Color._ClampFragmentColor) {
1257             params[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1258             params[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1259             params[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1260             params[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1261          }
1262          else {
1263             params[0] = obj->Sampler.BorderColor.f[0];
1264             params[1] = obj->Sampler.BorderColor.f[1];
1265             params[2] = obj->Sampler.BorderColor.f[2];
1266             params[3] = obj->Sampler.BorderColor.f[3];
1267          }
1268          break;
1269       case GL_TEXTURE_RESIDENT:
1270          *params = 1.0F;
1271          break;
1272       case GL_TEXTURE_PRIORITY:
1273          *params = obj->Priority;
1274          break;
1275       case GL_TEXTURE_MIN_LOD:
1276          *params = obj->Sampler.MinLod;
1277          break;
1278       case GL_TEXTURE_MAX_LOD:
1279          *params = obj->Sampler.MaxLod;
1280          break;
1281       case GL_TEXTURE_BASE_LEVEL:
1282          *params = (GLfloat) obj->BaseLevel;
1283          break;
1284       case GL_TEXTURE_MAX_LEVEL:
1285          *params = (GLfloat) obj->MaxLevel;
1286          break;
1287       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1288          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1289             goto invalid_pname;
1290          *params = obj->Sampler.MaxAnisotropy;
1291          break;
1292       case GL_GENERATE_MIPMAP_SGIS:
1293          *params = (GLfloat) obj->GenerateMipmap;
1294          break;
1295       case GL_TEXTURE_COMPARE_MODE_ARB:
1296          if (!ctx->Extensions.ARB_shadow)
1297             goto invalid_pname;
1298          *params = (GLfloat) obj->Sampler.CompareMode;
1299          break;
1300       case GL_TEXTURE_COMPARE_FUNC_ARB:
1301          if (!ctx->Extensions.ARB_shadow)
1302             goto invalid_pname;
1303          *params = (GLfloat) obj->Sampler.CompareFunc;
1304          break;
1305       case GL_DEPTH_TEXTURE_MODE_ARB:
1306          if (!ctx->Extensions.ARB_depth_texture)
1307             goto invalid_pname;
1308          *params = (GLfloat) obj->DepthMode;
1309          break;
1310       case GL_TEXTURE_LOD_BIAS:
1311          *params = obj->Sampler.LodBias;
1312          break;
1313 #if FEATURE_OES_draw_texture
1314       case GL_TEXTURE_CROP_RECT_OES:
1315          params[0] = obj->CropRect[0];
1316          params[1] = obj->CropRect[1];
1317          params[2] = obj->CropRect[2];
1318          params[3] = obj->CropRect[3];
1319          break;
1320 #endif
1321
1322       case GL_TEXTURE_SWIZZLE_R_EXT:
1323       case GL_TEXTURE_SWIZZLE_G_EXT:
1324       case GL_TEXTURE_SWIZZLE_B_EXT:
1325       case GL_TEXTURE_SWIZZLE_A_EXT:
1326          if (!ctx->Extensions.EXT_texture_swizzle)
1327             goto invalid_pname;
1328          *params = (GLfloat) obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1329          break;
1330
1331       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1332          if (!ctx->Extensions.EXT_texture_swizzle) {
1333             goto invalid_pname;
1334          }
1335          else {
1336             GLuint comp;
1337             for (comp = 0; comp < 4; comp++) {
1338                params[comp] = (GLfloat) obj->Swizzle[comp];
1339             }
1340          }
1341          break;
1342
1343       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1344          if (!ctx->Extensions.AMD_seamless_cubemap_per_texture)
1345             goto invalid_pname;
1346          *params = (GLfloat) obj->Sampler.CubeMapSeamless;
1347          break;
1348
1349       case GL_TEXTURE_IMMUTABLE_FORMAT:
1350          if (!ctx->Extensions.ARB_texture_storage)
1351             goto invalid_pname;
1352          *params = (GLfloat) obj->Immutable;
1353          break;
1354
1355       default:
1356          goto invalid_pname;
1357    }
1358
1359    /* no error if we get here */
1360    _mesa_unlock_texture(ctx, obj);
1361    return;
1362
1363 invalid_pname:
1364    _mesa_unlock_texture(ctx, obj);
1365    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname);
1366 }
1367
1368
1369 void GLAPIENTRY
1370 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1371 {
1372    struct gl_texture_object *obj;
1373    GET_CURRENT_CONTEXT(ctx);
1374    ASSERT_OUTSIDE_BEGIN_END(ctx);
1375
1376    obj = get_texobj(ctx, target, GL_TRUE);
1377    if (!obj)
1378       return;
1379
1380    _mesa_lock_texture(ctx, obj);
1381    switch (pname) {
1382       case GL_TEXTURE_MAG_FILTER:
1383          *params = (GLint) obj->Sampler.MagFilter;
1384          break;
1385       case GL_TEXTURE_MIN_FILTER:
1386          *params = (GLint) obj->Sampler.MinFilter;
1387          break;
1388       case GL_TEXTURE_WRAP_S:
1389          *params = (GLint) obj->Sampler.WrapS;
1390          break;
1391       case GL_TEXTURE_WRAP_T:
1392          *params = (GLint) obj->Sampler.WrapT;
1393          break;
1394       case GL_TEXTURE_WRAP_R:
1395          *params = (GLint) obj->Sampler.WrapR;
1396          break;
1397       case GL_TEXTURE_BORDER_COLOR:
1398          {
1399             GLfloat b[4];
1400             b[0] = CLAMP(obj->Sampler.BorderColor.f[0], 0.0F, 1.0F);
1401             b[1] = CLAMP(obj->Sampler.BorderColor.f[1], 0.0F, 1.0F);
1402             b[2] = CLAMP(obj->Sampler.BorderColor.f[2], 0.0F, 1.0F);
1403             b[3] = CLAMP(obj->Sampler.BorderColor.f[3], 0.0F, 1.0F);
1404             params[0] = FLOAT_TO_INT(b[0]);
1405             params[1] = FLOAT_TO_INT(b[1]);
1406             params[2] = FLOAT_TO_INT(b[2]);
1407             params[3] = FLOAT_TO_INT(b[3]);
1408          }
1409          break;
1410       case GL_TEXTURE_RESIDENT:
1411          *params = 1;
1412          break;
1413       case GL_TEXTURE_PRIORITY:
1414          *params = FLOAT_TO_INT(obj->Priority);
1415          break;
1416       case GL_TEXTURE_MIN_LOD:
1417          *params = (GLint) obj->Sampler.MinLod;
1418          break;
1419       case GL_TEXTURE_MAX_LOD:
1420          *params = (GLint) obj->Sampler.MaxLod;
1421          break;
1422       case GL_TEXTURE_BASE_LEVEL:
1423          *params = obj->BaseLevel;
1424          break;
1425       case GL_TEXTURE_MAX_LEVEL:
1426          *params = obj->MaxLevel;
1427          break;
1428       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1429          if (!ctx->Extensions.EXT_texture_filter_anisotropic)
1430             goto invalid_pname;
1431          *params = (GLint) obj->Sampler.MaxAnisotropy;
1432          break;
1433       case GL_GENERATE_MIPMAP_SGIS:
1434          *params = (GLint) obj->GenerateMipmap;
1435          break;
1436       case GL_TEXTURE_COMPARE_MODE_ARB:
1437          if (!ctx->Extensions.ARB_shadow)
1438             goto invalid_pname;
1439          *params = (GLint) obj->Sampler.CompareMode;
1440          break;
1441       case GL_TEXTURE_COMPARE_FUNC_ARB:
1442          if (!ctx->Extensions.ARB_shadow)
1443             goto invalid_pname;
1444          *params = (GLint) obj->Sampler.CompareFunc;
1445          break;
1446       case GL_DEPTH_TEXTURE_MODE_ARB:
1447          if (!ctx->Extensions.ARB_depth_texture)
1448             goto invalid_pname;
1449          *params = (GLint) obj->DepthMode;
1450          break;
1451       case GL_TEXTURE_LOD_BIAS:
1452          *params = (GLint) obj->Sampler.LodBias;
1453          break;
1454 #if FEATURE_OES_draw_texture
1455       case GL_TEXTURE_CROP_RECT_OES:
1456          params[0] = obj->CropRect[0];
1457          params[1] = obj->CropRect[1];
1458          params[2] = obj->CropRect[2];
1459          params[3] = obj->CropRect[3];
1460          break;
1461 #endif
1462       case GL_TEXTURE_SWIZZLE_R_EXT:
1463       case GL_TEXTURE_SWIZZLE_G_EXT:
1464       case GL_TEXTURE_SWIZZLE_B_EXT:
1465       case GL_TEXTURE_SWIZZLE_A_EXT:
1466          if (!ctx->Extensions.EXT_texture_swizzle)
1467             goto invalid_pname;
1468          *params = obj->Swizzle[pname - GL_TEXTURE_SWIZZLE_R_EXT];
1469          break;
1470
1471       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1472          if (!ctx->Extensions.EXT_texture_swizzle)
1473             goto invalid_pname;
1474          COPY_4V(params, obj->Swizzle);
1475          break;
1476
1477       case GL_TEXTURE_CUBE_MAP_SEAMLESS:
1478          if (!ctx->Extensions.AMD_seamless_cubemap_per_texture)
1479             goto invalid_pname;
1480          *params = (GLint) obj->Sampler.CubeMapSeamless;
1481          break;
1482
1483       case GL_TEXTURE_IMMUTABLE_FORMAT:
1484          if (!ctx->Extensions.ARB_texture_storage)
1485             goto invalid_pname;
1486          *params = (GLint) obj->Immutable;
1487          break;
1488
1489       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
1490          if (!ctx->Extensions.OES_EGL_image_external)
1491             goto invalid_pname;
1492          *params = obj->RequiredTextureImageUnits;
1493          break;
1494
1495       default:
1496          goto invalid_pname;
1497    }
1498
1499    /* no error if we get here */
1500    _mesa_unlock_texture(ctx, obj);
1501    return;
1502
1503 invalid_pname:
1504    _mesa_unlock_texture(ctx, obj);
1505    _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
1506 }
1507
1508
1509 /** New in GL 3.0 */
1510 void GLAPIENTRY
1511 _mesa_GetTexParameterIiv(GLenum target, GLenum pname, GLint *params)
1512 {
1513    struct gl_texture_object *texObj;
1514    GET_CURRENT_CONTEXT(ctx);
1515    ASSERT_OUTSIDE_BEGIN_END(ctx);
1516
1517    texObj = get_texobj(ctx, target, GL_TRUE);
1518    if (!texObj)
1519       return;
1520
1521    switch (pname) {
1522    case GL_TEXTURE_BORDER_COLOR:
1523       COPY_4V(params, texObj->Sampler.BorderColor.i);
1524       break;
1525    default:
1526       _mesa_GetTexParameteriv(target, pname, params);
1527    }
1528 }
1529
1530
1531 /** New in GL 3.0 */
1532 void GLAPIENTRY
1533 _mesa_GetTexParameterIuiv(GLenum target, GLenum pname, GLuint *params)
1534 {
1535    struct gl_texture_object *texObj;
1536    GET_CURRENT_CONTEXT(ctx);
1537    ASSERT_OUTSIDE_BEGIN_END(ctx);
1538
1539    texObj = get_texobj(ctx, target, GL_TRUE);
1540    if (!texObj)
1541       return;
1542
1543    switch (pname) {
1544    case GL_TEXTURE_BORDER_COLOR:
1545       COPY_4V(params, texObj->Sampler.BorderColor.i);
1546       break;
1547    default:
1548       {
1549          GLint ip[4];
1550          _mesa_GetTexParameteriv(target, pname, ip);
1551          params[0] = ip[0];
1552          if (pname == GL_TEXTURE_SWIZZLE_RGBA_EXT ||
1553              pname == GL_TEXTURE_CROP_RECT_OES) {
1554             params[1] = ip[1];
1555             params[2] = ip[2];
1556             params[3] = ip[3];
1557          }
1558       }
1559    }
1560 }