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/macros.h"
  39 #include "main/texcompress.h"
  40 #include "main/texparam.h"
  41 #include "main/teximage.h"
  42 #include "main/texstate.h"
  43 #include "shader/prog_instruction.h"
  44
  45
  46 /**
  47  * Check if a coordinate wrap mode is supported for the texture target.
  48  * \return GL_TRUE if legal, GL_FALSE otherwise
  49  */
  50 static GLboolean
  51 validate_texture_wrap_mode(GLcontext * ctx, GLenum target, GLenum wrap)
  52 {
  53    const struct gl_extensions * const e = & ctx->Extensions;
  54
  55    if (wrap == GL_CLAMP || wrap == GL_CLAMP_TO_EDGE ||
  56        (wrap == GL_CLAMP_TO_BORDER && e->ARB_texture_border_clamp)) {
  57       /* any texture target */
  58       return GL_TRUE;
  59    }
  60    else if (target != GL_TEXTURE_RECTANGLE_NV &&
  61             (wrap == GL_REPEAT ||
  62              (wrap == GL_MIRRORED_REPEAT &&
  63               e->ARB_texture_mirrored_repeat) ||
  64              (wrap == GL_MIRROR_CLAMP_EXT &&
  65               (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) ||
  66              (wrap == GL_MIRROR_CLAMP_TO_EDGE_EXT &&
  67               (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) ||
  68              (wrap == GL_MIRROR_CLAMP_TO_BORDER_EXT &&
  69               (e->EXT_texture_mirror_clamp)))) {
  70       /* non-rectangle texture */
  71       return GL_TRUE;
  72    }
  73
  74    _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)", wrap );
  75    return GL_FALSE;
  76 }
  77
  78
  79 /**
  80  * Get current texture object for given target.
  81  * Return NULL if any error.
  82  * Note that this is different from _mesa_select_tex_object() in that proxy
  83  * targets are not accepted.
  84  */
  85 static struct gl_texture_object *
  86 get_texobj(GLcontext *ctx, GLenum target)
  87 {
  88    struct gl_texture_unit *texUnit;
  89
  90    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
  91       _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(current unit)");
  92       return NULL;
  93    }
  94
  95    texUnit = _mesa_get_current_tex_unit(ctx);
  96
  97    switch (target) {
  98    case GL_TEXTURE_1D:
  99       return texUnit->CurrentTex[TEXTURE_1D_INDEX];
 100    case GL_TEXTURE_2D:
 101       return texUnit->CurrentTex[TEXTURE_2D_INDEX];
 102    case GL_TEXTURE_3D:
 103       return texUnit->CurrentTex[TEXTURE_3D_INDEX];
 104    case GL_TEXTURE_CUBE_MAP:
 105       if (ctx->Extensions.ARB_texture_cube_map) {
 106          return texUnit->CurrentTex[TEXTURE_CUBE_INDEX];
 107       }
 108       break;
 109    case GL_TEXTURE_RECTANGLE_NV:
 110       if (ctx->Extensions.NV_texture_rectangle) {
 111          return texUnit->CurrentTex[TEXTURE_RECT_INDEX];
 112       }
 113       break;
 114    case GL_TEXTURE_1D_ARRAY_EXT:
 115       if (ctx->Extensions.MESA_texture_array) {
 116          return texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX];
 117       }
 118       break;
 119    case GL_TEXTURE_2D_ARRAY_EXT:
 120       if (ctx->Extensions.MESA_texture_array) {
 121          return texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX];
 122       }
 123       break;
 124    default:
 125       ;
 126    }
 127
 128    _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(target)");
 129    return NULL;
 130 }
 131
 132
 133 /**
 134  * Convert GL_RED/GREEN/BLUE/ALPHA/ZERO/ONE to SWIZZLE_X/Y/Z/W/ZERO/ONE.
 135  * \return -1 if error.
 136  */
 137 static GLint
 138 comp_to_swizzle(GLenum comp)
 139 {
 140    switch (comp) {
 141    case GL_RED:
 142       return SWIZZLE_X;
 143    case GL_GREEN:
 144       return SWIZZLE_Y;
 145    case GL_BLUE:
 146       return SWIZZLE_Z;
 147    case GL_ALPHA:
 148       return SWIZZLE_W;
 149    case GL_ZERO:
 150       return SWIZZLE_ZERO;
 151    case GL_ONE:
 152       return SWIZZLE_ONE;
 153    default:
 154       return -1;
 155    }
 156 }
 157
 158
 159 static void
 160 set_swizzle_component(GLuint *swizzle, GLuint comp, GLuint swz)
 161 {
 162    ASSERT(comp < 4);
 163    ASSERT(swz <= SWIZZLE_NIL);
 164    {
 165       GLuint mask = 0x7 << (3 * comp);
 166       GLuint s = (*swizzle & ~mask) | (swz << (3 * comp));
 167       *swizzle = s;
 168    }
 169 }
 170
 171
 172 /**
 173  * This is called just prior to changing any texture object state.
 174  * Any pending rendering will be flushed out, we'll set the _NEW_TEXTURE
 175  * state flag and then mark the texture object as 'incomplete' so that any
 176  * per-texture derived state gets recomputed.
 177  */
 178 static INLINE void
 179 flush(GLcontext *ctx, struct gl_texture_object *texObj)
 180 {
 181    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 182    texObj->_Complete = GL_FALSE;
 183 }
 184
 185
 186 /**
 187  * Set an integer-valued texture parameter
 188  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 189  */
 190 static GLboolean
 191 set_tex_parameteri(GLcontext *ctx,
 192                    struct gl_texture_object *texObj,
 193                    GLenum pname, const GLint *params)
 194 {
 195    switch (pname) {
 196    case GL_TEXTURE_MIN_FILTER:
 197       if (texObj->MinFilter == params[0])
 198          return GL_FALSE;
 199       switch (params[0]) {
 200       case GL_NEAREST:
 201       case GL_LINEAR:
 202          flush(ctx, texObj);
 203          texObj->MinFilter = params[0];
 204          return GL_TRUE;
 205       case GL_NEAREST_MIPMAP_NEAREST:
 206       case GL_LINEAR_MIPMAP_NEAREST:
 207       case GL_NEAREST_MIPMAP_LINEAR:
 208       case GL_LINEAR_MIPMAP_LINEAR:
 209          if (texObj->Target != GL_TEXTURE_RECTANGLE_NV) {
 210             flush(ctx, texObj);
 211             texObj->MinFilter = params[0];
 212             return GL_TRUE;
 213          }
 214          /* fall-through */
 215       default:
 216          _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)",
 217                       params[0] );
 218       }
 219       return GL_FALSE;
 220
 221    case GL_TEXTURE_MAG_FILTER:
 222       if (texObj->MagFilter == params[0])
 223          return GL_FALSE;
 224       switch (params[0]) {
 225       case GL_NEAREST:
 226       case GL_LINEAR:
 227          flush(ctx, texObj);
 228          texObj->MagFilter = params[0];
 229          return GL_TRUE;
 230       default:
 231          _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(param=0x%x)",
 232                       params[0]);
 233       }
 234       return GL_FALSE;
 235
 236    case GL_TEXTURE_WRAP_S:
 237       if (texObj->WrapS == params[0])
 238          return GL_FALSE;
 239       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 240          flush(ctx, texObj);
 241          texObj->WrapS = params[0];
 242          return GL_TRUE;
 243       }
 244       return GL_FALSE;
 245
 246    case GL_TEXTURE_WRAP_T:
 247       if (texObj->WrapT == params[0])
 248          return GL_FALSE;
 249       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 250          flush(ctx, texObj);
 251          texObj->WrapT = params[0];
 252          return GL_TRUE;
 253       }
 254       return GL_FALSE;
 255
 256    case GL_TEXTURE_WRAP_R:
 257       if (texObj->WrapR == params[0])
 258          return GL_FALSE;
 259       if (validate_texture_wrap_mode(ctx, texObj->Target, params[0])) {
 260          flush(ctx, texObj);
 261          texObj->WrapR = params[0];
 262          return GL_TRUE;
 263       }
 264       return GL_FALSE;
 265
 266    case GL_TEXTURE_BASE_LEVEL:
 267       if (texObj->BaseLevel == params[0])
 268          return GL_FALSE;
 269       if (params[0] < 0 ||
 270           (texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0)) {
 271          _mesa_error(ctx, GL_INVALID_VALUE,
 272                      "glTexParameter(param=%d)", params[0]);
 273          return GL_FALSE;
 274       }
 275       flush(ctx, texObj);
 276       texObj->BaseLevel = params[0];
 277       return GL_TRUE;
 278
 279    case GL_TEXTURE_MAX_LEVEL:
 280       if (texObj->MaxLevel == params[0])
 281          return GL_FALSE;
 282       if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
 283          _mesa_error(ctx, GL_INVALID_OPERATION,
 284                      "glTexParameter(param=%d)", params[0]);
 285          return GL_FALSE;
 286       }
 287       flush(ctx, texObj);
 288       texObj->MaxLevel = params[0];
 289       return GL_TRUE;
 290
 291    case GL_GENERATE_MIPMAP_SGIS:
 292       if (ctx->Extensions.SGIS_generate_mipmap) {
 293          if (texObj->GenerateMipmap != params[0]) {
 294             flush(ctx, texObj);
 295             texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
 296             return GL_TRUE;
 297          }
 298          return GL_FALSE;
 299       }
 300       else {
 301          _mesa_error(ctx, GL_INVALID_ENUM,
 302                      "glTexParameter(pname=GL_GENERATE_MIPMAP_SGIS)");
 303       }
 304       return GL_FALSE;
 305
 306    case GL_TEXTURE_COMPARE_MODE_ARB:
 307       if (ctx->Extensions.ARB_shadow &&
 308           (params[0] == GL_NONE ||
 309            params[0] == GL_COMPARE_R_TO_TEXTURE_ARB)) {
 310          if (texObj->CompareMode != params[0]) {
 311             flush(ctx, texObj);
 312             texObj->CompareMode = params[0];
 313             return GL_TRUE;
 314          }
 315          return GL_FALSE;
 316       }
 317       else {
 318          _mesa_error(ctx, GL_INVALID_ENUM,
 319                      "glTexParameter(GL_TEXTURE_COMPARE_MODE_ARB)");
 320       }
 321       return GL_FALSE;
 322
 323    case GL_TEXTURE_COMPARE_FUNC_ARB:
 324       if (ctx->Extensions.ARB_shadow) {
 325          if (texObj->CompareFunc == params[0])
 326             return GL_FALSE;
 327          switch (params[0]) {
 328          case GL_LEQUAL:
 329          case GL_GEQUAL:
 330             flush(ctx, texObj);
 331             texObj->CompareFunc = params[0];
 332             return GL_TRUE;
 333          case GL_EQUAL:
 334          case GL_NOTEQUAL:
 335          case GL_LESS:
 336          case GL_GREATER:
 337          case GL_ALWAYS:
 338          case GL_NEVER:
 339             if (ctx->Extensions.EXT_shadow_funcs) {
 340                flush(ctx, texObj);
 341                texObj->CompareFunc = params[0];
 342                return GL_TRUE;
 343             }
 344             /* fall-through */
 345          default:
 346             _mesa_error(ctx, GL_INVALID_ENUM,
 347                         "glTexParameter(GL_TEXTURE_COMPARE_FUNC_ARB)");
 348          }
 349       }
 350       else {
 351          _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 352       }
 353       return GL_FALSE;
 354
 355    case GL_DEPTH_TEXTURE_MODE_ARB:
 356       if (ctx->Extensions.ARB_depth_texture &&
 357           (params[0] == GL_LUMINANCE ||
 358            params[0] == GL_INTENSITY ||
 359            params[0] == GL_ALPHA)) {
 360          if (texObj->DepthMode != params[0]) {
 361             flush(ctx, texObj);
 362             texObj->DepthMode = params[0];
 363             return GL_TRUE;
 364          }
 365       }
 366       else {
 367          _mesa_error(ctx, GL_INVALID_ENUM,
 368                      "glTexParameter(GL_DEPTH_TEXTURE_MODE_ARB)");
 369       }
 370       return GL_FALSE;
 371
 372 #ifdef FEATURE_OES_draw_texture
 373    case GL_TEXTURE_CROP_RECT_OES:
 374       texObj->CropRect[0] = params[0];
 375       texObj->CropRect[1] = params[1];
 376       texObj->CropRect[2] = params[2];
 377       texObj->CropRect[3] = params[3];
 378       return GL_TRUE;
 379 #endif
 380
 381    case GL_TEXTURE_SWIZZLE_R_EXT:
 382    case GL_TEXTURE_SWIZZLE_G_EXT:
 383    case GL_TEXTURE_SWIZZLE_B_EXT:
 384    case GL_TEXTURE_SWIZZLE_A_EXT:
 385       if (ctx->Extensions.EXT_texture_swizzle) {
 386          const GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
 387          const GLint swz = comp_to_swizzle(params[0]);
 388          if (swz < 0) {
 389             _mesa_error(ctx, GL_INVALID_OPERATION,
 390                         "glTexParameter(swizzle 0x%x)", params[0]);
 391             return GL_FALSE;
 392          }
 393          ASSERT(comp < 4);
 394          if (swz >= 0) {
 395             flush(ctx, texObj);
 396             texObj->Swizzle[comp] = params[0];
 397             set_swizzle_component(&texObj->_Swizzle, comp, swz);
 398             return GL_TRUE;
 399          }
 400       }
 401       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 402       return GL_FALSE;
 403
 404    case GL_TEXTURE_SWIZZLE_RGBA_EXT:
 405       if (ctx->Extensions.EXT_texture_swizzle) {
 406          GLuint comp;
 407          flush(ctx, texObj);
 408          for (comp = 0; comp < 4; comp++) {
 409             const GLint swz = comp_to_swizzle(params[comp]);
 410             if (swz >= 0) {
 411                texObj->Swizzle[comp] = params[comp];
 412                set_swizzle_component(&texObj->_Swizzle, comp, swz);
 413             }
 414             else {
 415                _mesa_error(ctx, GL_INVALID_OPERATION,
 416                            "glTexParameter(swizzle 0x%x)", params[comp]);
 417                return GL_FALSE;
 418             }
 419          }
 420          return GL_TRUE;
 421       }
 422       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 423       return GL_FALSE;
 424
 425    default:
 426       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 427    }
 428    return GL_FALSE;
 429 }
 430
 431
 432 /**
 433  * Set a float-valued texture parameter
 434  * \return GL_TRUE if legal AND the value changed, GL_FALSE otherwise
 435  */
 436 static GLboolean
 437 set_tex_parameterf(GLcontext *ctx,
 438                    struct gl_texture_object *texObj,
 439                    GLenum pname, const GLfloat *params)
 440 {
 441    switch (pname) {
 442    case GL_TEXTURE_MIN_LOD:
 443       if (texObj->MinLod == params[0])
 444          return GL_FALSE;
 445       flush(ctx, texObj);
 446       texObj->MinLod = params[0];
 447       return GL_TRUE;
 448
 449    case GL_TEXTURE_MAX_LOD:
 450       if (texObj->MaxLod == params[0])
 451          return GL_FALSE;
 452       flush(ctx, texObj);
 453       texObj->MaxLod = params[0];
 454       return GL_TRUE;
 455
 456    case GL_TEXTURE_PRIORITY:
 457       flush(ctx, texObj);
 458       texObj->Priority = CLAMP(params[0], 0.0F, 1.0F);
 459       return GL_TRUE;
 460
 461    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 462       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 463          if (texObj->MaxAnisotropy == params[0])
 464             return GL_FALSE;
 465          if (params[0] < 1.0) {
 466             _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
 467             return GL_FALSE;
 468          }
 469          flush(ctx, texObj);
 470          /* clamp to max, that's what NVIDIA does */
 471          texObj->MaxAnisotropy = MIN2(params[0],
 472                                       ctx->Const.MaxTextureMaxAnisotropy);
 473          return GL_TRUE;
 474       }
 475       else {
 476          static GLuint count = 0;
 477          if (count++ < 10)
 478             _mesa_error(ctx, GL_INVALID_ENUM,
 479                         "glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)");
 480       }
 481       return GL_FALSE;
 482
 483    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 484       if (ctx->Extensions.ARB_shadow_ambient) {
 485          if (texObj->CompareFailValue != params[0]) {
 486             flush(ctx, texObj);
 487             texObj->CompareFailValue = CLAMP(params[0], 0.0F, 1.0F);
 488             return GL_TRUE;
 489          }
 490       }
 491       else {
 492          _mesa_error(ctx, GL_INVALID_ENUM,
 493                     "glTexParameter(pname=GL_TEXTURE_COMPARE_FAIL_VALUE_ARB)");
 494       }
 495       return GL_FALSE;
 496
 497    case GL_TEXTURE_LOD_BIAS:
 498       /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias */
 499       if (ctx->Extensions.EXT_texture_lod_bias) {
 500          if (texObj->LodBias != params[0]) {
 501             flush(ctx, texObj);
 502             texObj->LodBias = params[0];
 503             return GL_TRUE;
 504          }
 505          return GL_FALSE;
 506       }
 507       break;
 508
 509    case GL_TEXTURE_BORDER_COLOR:
 510       flush(ctx, texObj);
 511       texObj->BorderColor[RCOMP] = params[0];
 512       texObj->BorderColor[GCOMP] = params[1];
 513       texObj->BorderColor[BCOMP] = params[2];
 514       texObj->BorderColor[ACOMP] = params[3];
 515       return GL_TRUE;
 516
 517    default:
 518       _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname);
 519    }
 520    return GL_FALSE;
 521 }
 522
 523
 524 void GLAPIENTRY
 525 _mesa_TexParameterf(GLenum target, GLenum pname, GLfloat param)
 526 {
 527    GLboolean need_update;
 528    struct gl_texture_object *texObj;
 529    GET_CURRENT_CONTEXT(ctx);
 530    ASSERT_OUTSIDE_BEGIN_END(ctx);
 531
 532    texObj = get_texobj(ctx, target);
 533    if (!texObj)
 534       return;
 535
 536    switch (pname) {
 537    case GL_TEXTURE_MIN_FILTER:
 538    case GL_TEXTURE_MAG_FILTER:
 539    case GL_TEXTURE_WRAP_S:
 540    case GL_TEXTURE_WRAP_T:
 541    case GL_TEXTURE_WRAP_R:
 542    case GL_TEXTURE_BASE_LEVEL:
 543    case GL_TEXTURE_MAX_LEVEL:
 544    case GL_GENERATE_MIPMAP_SGIS:
 545    case GL_TEXTURE_COMPARE_MODE_ARB:
 546    case GL_TEXTURE_COMPARE_FUNC_ARB:
 547    case GL_DEPTH_TEXTURE_MODE_ARB:
 548       {
 549          /* convert float param to int */
 550          GLint p[4];
 551          p[0] = (GLint) param;
 552          p[1] = p[2] = p[3] = 0;
 553          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 554       }
 555       break;
 556    default:
 557       {
 558          /* this will generate an error if pname is illegal */
 559          GLfloat p[4];
 560          p[0] = param;
 561          p[1] = p[2] = p[3] = 0.0F;
 562          need_update = set_tex_parameterf(ctx, texObj, pname, p);
 563       }
 564    }
 565
 566    if (ctx->Driver.TexParameter && need_update) {
 567       ctx->Driver.TexParameter(ctx, target, texObj, pname, &param);
 568    }
 569 }
 570
 571
 572 void GLAPIENTRY
 573 _mesa_TexParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 574 {
 575    GLboolean need_update;
 576    struct gl_texture_object *texObj;
 577    GET_CURRENT_CONTEXT(ctx);
 578    ASSERT_OUTSIDE_BEGIN_END(ctx);
 579
 580    texObj = get_texobj(ctx, target);
 581    if (!texObj)
 582       return;
 583
 584    switch (pname) {
 585    case GL_TEXTURE_MIN_FILTER:
 586    case GL_TEXTURE_MAG_FILTER:
 587    case GL_TEXTURE_WRAP_S:
 588    case GL_TEXTURE_WRAP_T:
 589    case GL_TEXTURE_WRAP_R:
 590    case GL_TEXTURE_BASE_LEVEL:
 591    case GL_TEXTURE_MAX_LEVEL:
 592    case GL_GENERATE_MIPMAP_SGIS:
 593    case GL_TEXTURE_COMPARE_MODE_ARB:
 594    case GL_TEXTURE_COMPARE_FUNC_ARB:
 595    case GL_DEPTH_TEXTURE_MODE_ARB:
 596       {
 597          /* convert float param to int */
 598          GLint p[4];
 599          p[0] = (GLint) params[0];
 600          p[1] = p[2] = p[3] = 0;
 601          need_update = set_tex_parameteri(ctx, texObj, pname, p);
 602       }
 603       break;
 604
 605 #ifdef FEATURE_OES_draw_texture
 606    case GL_TEXTURE_CROP_RECT_OES:
 607       {
 608          /* convert float params to int */
 609          GLint iparams[4];
 610          iparams[0] = (GLint) params[0];
 611          iparams[1] = (GLint) params[1];
 612          iparams[2] = (GLint) params[2];
 613          iparams[3] = (GLint) params[3];
 614          need_update = set_tex_parameteri(ctx, texObj, pname, iparams);
 615       }
 616       break;
 617 #endif
 618
 619    default:
 620       /* this will generate an error if pname is illegal */
 621       need_update = set_tex_parameterf(ctx, texObj, pname, params);
 622    }
 623
 624    if (ctx->Driver.TexParameter && need_update) {
 625       ctx->Driver.TexParameter(ctx, target, texObj, pname, params);
 626    }
 627 }
 628
 629
 630 void GLAPIENTRY
 631 _mesa_TexParameteri(GLenum target, GLenum pname, GLint param)
 632 {
 633    GLboolean need_update;
 634    struct gl_texture_object *texObj;
 635    GET_CURRENT_CONTEXT(ctx);
 636    ASSERT_OUTSIDE_BEGIN_END(ctx);
 637
 638    texObj = get_texobj(ctx, target);
 639    if (!texObj)
 640       return;
 641
 642    switch (pname) {
 643    case GL_TEXTURE_MIN_LOD:
 644    case GL_TEXTURE_MAX_LOD:
 645    case GL_TEXTURE_PRIORITY:
 646    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 647    case GL_TEXTURE_LOD_BIAS:
 648    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 649       {
 650          GLfloat fparam[4];
 651          fparam[0] = (GLfloat) param;
 652          fparam[1] = fparam[2] = fparam[3] = 0.0F;
 653          /* convert int param to float */
 654          need_update = set_tex_parameterf(ctx, texObj, pname, fparam);
 655       }
 656       break;
 657    default:
 658       /* this will generate an error if pname is illegal */
 659       {
 660          GLint iparam[4];
 661          iparam[0] = param;
 662          iparam[1] = iparam[2] = iparam[3] = 0;
 663          need_update = set_tex_parameteri(ctx, texObj, pname, iparam);
 664       }
 665    }
 666
 667    if (ctx->Driver.TexParameter && need_update) {
 668       GLfloat fparam = (GLfloat) param;
 669       ctx->Driver.TexParameter(ctx, target, texObj, pname, &fparam);
 670    }
 671 }
 672
 673
 674 void GLAPIENTRY
 675 _mesa_TexParameteriv(GLenum target, GLenum pname, const GLint *params)
 676 {
 677    GLboolean need_update;
 678    struct gl_texture_object *texObj;
 679    GET_CURRENT_CONTEXT(ctx);
 680    ASSERT_OUTSIDE_BEGIN_END(ctx);
 681
 682    texObj = get_texobj(ctx, target);
 683    if (!texObj)
 684       return;
 685
 686    switch (pname) {
 687    case GL_TEXTURE_BORDER_COLOR:
 688       {
 689          /* convert int params to float */
 690          GLfloat fparams[4];
 691          fparams[0] = INT_TO_FLOAT(params[0]);
 692          fparams[1] = INT_TO_FLOAT(params[1]);
 693          fparams[2] = INT_TO_FLOAT(params[2]);
 694          fparams[3] = INT_TO_FLOAT(params[3]);
 695          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 696       }
 697       break;
 698    case GL_TEXTURE_MIN_LOD:
 699    case GL_TEXTURE_MAX_LOD:
 700    case GL_TEXTURE_PRIORITY:
 701    case GL_TEXTURE_MAX_ANISOTROPY_EXT:
 702    case GL_TEXTURE_LOD_BIAS:
 703    case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
 704       {
 705          /* convert int param to float */
 706          GLfloat fparams[4];
 707          fparams[0] = (GLfloat) params[0];
 708          fparams[1] = fparams[2] = fparams[3] = 0.0F;
 709          need_update = set_tex_parameterf(ctx, texObj, pname, fparams);
 710       }
 711       break;
 712    default:
 713       /* this will generate an error if pname is illegal */
 714       need_update = set_tex_parameteri(ctx, texObj, pname, params);
 715    }
 716
 717    if (ctx->Driver.TexParameter && need_update) {
 718       GLfloat fparams[4];
 719       fparams[0] = INT_TO_FLOAT(params[0]);
 720       if (pname == GL_TEXTURE_BORDER_COLOR ||
 721           pname == GL_TEXTURE_CROP_RECT_OES) {
 722          fparams[1] = INT_TO_FLOAT(params[1]);
 723          fparams[2] = INT_TO_FLOAT(params[2]);
 724          fparams[3] = INT_TO_FLOAT(params[3]);
 725       }
 726       ctx->Driver.TexParameter(ctx, target, texObj, pname, fparams);
 727    }
 728 }
 729
 730
 731 void GLAPIENTRY
 732 _mesa_GetTexLevelParameterfv( GLenum target, GLint level,
 733                               GLenum pname, GLfloat *params )
 734 {
 735    GLint iparam;
 736    _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
 737    *params = (GLfloat) iparam;
 738 }
 739
 740
 741 void GLAPIENTRY
 742 _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
 743                               GLenum pname, GLint *params )
 744 {
 745    const struct gl_texture_unit *texUnit;
 746    struct gl_texture_object *texObj;
 747    const struct gl_texture_image *img = NULL;
 748    GLboolean isProxy;
 749    GLint maxLevels;
 750    gl_format texFormat;
 751    GET_CURRENT_CONTEXT(ctx);
 752    ASSERT_OUTSIDE_BEGIN_END(ctx);
 753
 754    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
 755       _mesa_error(ctx, GL_INVALID_OPERATION,
 756                   "glGetTexLevelParameteriv(current unit)");
 757       return;
 758    }
 759
 760    texUnit = _mesa_get_current_tex_unit(ctx);
 761
 762    /* this will catch bad target values */
 763    maxLevels = _mesa_max_texture_levels(ctx, target);
 764    if (maxLevels == 0) {
 765       _mesa_error(ctx, GL_INVALID_ENUM,
 766                   "glGetTexLevelParameter[if]v(target=0x%x)", target);
 767       return;
 768    }
 769
 770    if (level < 0 || level >= maxLevels) {
 771       _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
 772       return;
 773    }
 774
 775    texObj = _mesa_select_tex_object(ctx, texUnit, target);
 776    _mesa_lock_texture(ctx, texObj);
 777
 778    img = _mesa_select_tex_image(ctx, texObj, target, level);
 779    if (!img || !img->TexFormat) {
 780       /* undefined texture image */
 781       if (pname == GL_TEXTURE_COMPONENTS)
 782          *params = 1;
 783       else
 784          *params = 0;
 785       goto out;
 786    }
 787
 788    texFormat = img->TexFormat;
 789
 790    isProxy = _mesa_is_proxy_texture(target);
 791
 792    switch (pname) {
 793       case GL_TEXTURE_WIDTH:
 794          *params = img->Width;
 795          break;
 796       case GL_TEXTURE_HEIGHT:
 797          *params = img->Height;
 798          break;
 799       case GL_TEXTURE_DEPTH:
 800          *params = img->Depth;
 801          break;
 802       case GL_TEXTURE_INTERNAL_FORMAT:
 803          if (_mesa_is_format_compressed(img->TexFormat)) {
 804             /* need to return the actual compressed format */
 805             *params = _mesa_compressed_format_to_glenum(ctx, img->TexFormat);
 806          }
 807          else {
 808             /* return the user's requested internal format */
 809             *params = img->InternalFormat;
 810          }
 811          break;
 812       case GL_TEXTURE_BORDER:
 813          *params = img->Border;
 814          break;
 815       case GL_TEXTURE_RED_SIZE:
 816       case GL_TEXTURE_GREEN_SIZE:
 817       case GL_TEXTURE_BLUE_SIZE:
 818          if (img->_BaseFormat == GL_RGB || img->_BaseFormat == GL_RGBA)
 819             *params = _mesa_get_format_bits(texFormat, pname);
 820          else
 821             *params = 0;
 822          break;
 823       case GL_TEXTURE_ALPHA_SIZE:
 824          if (img->_BaseFormat == GL_ALPHA ||
 825              img->_BaseFormat == GL_LUMINANCE_ALPHA ||
 826              img->_BaseFormat == GL_RGBA)
 827             *params = _mesa_get_format_bits(texFormat, pname);
 828          else
 829             *params = 0;
 830          break;
 831       case GL_TEXTURE_INTENSITY_SIZE:
 832          if (img->_BaseFormat != GL_INTENSITY)
 833             *params = 0;
 834          else {
 835             *params = _mesa_get_format_bits(texFormat, pname);
 836             if (*params == 0) {
 837                /* intensity probably stored as rgb texture */
 838                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 839                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 840             }
 841          }
 842          break;
 843       case GL_TEXTURE_LUMINANCE_SIZE:
 844          if (img->_BaseFormat != GL_LUMINANCE &&
 845              img->_BaseFormat != GL_LUMINANCE_ALPHA)
 846             *params = 0;
 847          else {
 848             *params = _mesa_get_format_bits(texFormat, pname);
 849             if (*params == 0) {
 850                /* luminance probably stored as rgb texture */
 851                *params = MIN2(_mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE),
 852                               _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE));
 853             }
 854          }
 855          break;
 856       case GL_TEXTURE_INDEX_SIZE_EXT:
 857          if (img->_BaseFormat == GL_COLOR_INDEX)
 858             *params = _mesa_get_format_bits(texFormat, pname);
 859          else
 860             *params = 0;
 861          break;
 862       case GL_TEXTURE_DEPTH_SIZE_ARB:
 863          if (ctx->Extensions.ARB_depth_texture)
 864             *params = _mesa_get_format_bits(texFormat, pname);
 865          else
 866             _mesa_error(ctx, GL_INVALID_ENUM,
 867                         "glGetTexLevelParameter[if]v(pname)");
 868          break;
 869       case GL_TEXTURE_STENCIL_SIZE_EXT:
 870          if (ctx->Extensions.EXT_packed_depth_stencil ||
 871              ctx->Extensions.ARB_framebuffer_object) {
 872             *params = _mesa_get_format_bits(texFormat, pname);
 873          }
 874          else {
 875             _mesa_error(ctx, GL_INVALID_ENUM,
 876                         "glGetTexLevelParameter[if]v(pname)");
 877          }
 878          break;
 879
 880       /* GL_ARB_texture_compression */
 881       case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
 882          if (_mesa_is_format_compressed(img->TexFormat) && !isProxy) {
 883             *params = _mesa_format_image_size(texFormat, img->Width,
 884                                               img->Height, img->Depth);
 885          }
 886          else {
 887             _mesa_error(ctx, GL_INVALID_OPERATION,
 888                         "glGetTexLevelParameter[if]v(pname)");
 889          }
 890          break;
 891       case GL_TEXTURE_COMPRESSED:
 892          *params = (GLint) _mesa_is_format_compressed(img->TexFormat);
 893          break;
 894
 895       /* GL_ARB_texture_float */
 896       case GL_TEXTURE_RED_TYPE_ARB:
 897          if (ctx->Extensions.ARB_texture_float) {
 898             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE) ?
 899                _mesa_get_format_datatype(texFormat) : GL_NONE;
 900          }
 901          else {
 902             _mesa_error(ctx, GL_INVALID_ENUM,
 903                         "glGetTexLevelParameter[if]v(pname)");
 904          }
 905          break;
 906       case GL_TEXTURE_GREEN_TYPE_ARB:
 907          if (ctx->Extensions.ARB_texture_float) {
 908             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE) ?
 909                _mesa_get_format_datatype(texFormat) : GL_NONE;
 910          }
 911          else {
 912             _mesa_error(ctx, GL_INVALID_ENUM,
 913                         "glGetTexLevelParameter[if]v(pname)");
 914          }
 915          break;
 916       case GL_TEXTURE_BLUE_TYPE_ARB:
 917          if (ctx->Extensions.ARB_texture_float) {
 918             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_BLUE_SIZE) ?
 919                _mesa_get_format_datatype(texFormat) : GL_NONE;
 920          }
 921          else {
 922             _mesa_error(ctx, GL_INVALID_ENUM,
 923                         "glGetTexLevelParameter[if]v(pname)");
 924          }
 925          break;
 926       case GL_TEXTURE_ALPHA_TYPE_ARB:
 927          if (ctx->Extensions.ARB_texture_float) {
 928             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_ALPHA_SIZE) ?
 929                _mesa_get_format_datatype(texFormat) : GL_NONE;
 930          }
 931          else {
 932             _mesa_error(ctx, GL_INVALID_ENUM,
 933                         "glGetTexLevelParameter[if]v(pname)");
 934          }
 935          break;
 936       case GL_TEXTURE_LUMINANCE_TYPE_ARB:
 937          if (ctx->Extensions.ARB_texture_float) {
 938             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_LUMINANCE_SIZE) ?
 939                _mesa_get_format_datatype(texFormat) : GL_NONE;
 940          }
 941          else {
 942             _mesa_error(ctx, GL_INVALID_ENUM,
 943                         "glGetTexLevelParameter[if]v(pname)");
 944          }
 945          break;
 946       case GL_TEXTURE_INTENSITY_TYPE_ARB:
 947          if (ctx->Extensions.ARB_texture_float) {
 948             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_INTENSITY_SIZE) ?
 949                _mesa_get_format_datatype(texFormat) : GL_NONE;
 950          }
 951          else {
 952             _mesa_error(ctx, GL_INVALID_ENUM,
 953                         "glGetTexLevelParameter[if]v(pname)");
 954          }
 955          break;
 956       case GL_TEXTURE_DEPTH_TYPE_ARB:
 957          if (ctx->Extensions.ARB_texture_float) {
 958             *params = _mesa_get_format_bits(texFormat, GL_TEXTURE_DEPTH_SIZE) ?
 959                _mesa_get_format_datatype(texFormat) : GL_NONE;
 960          }
 961          else {
 962             _mesa_error(ctx, GL_INVALID_ENUM,
 963                         "glGetTexLevelParameter[if]v(pname)");
 964          }
 965          break;
 966
 967       default:
 968          _mesa_error(ctx, GL_INVALID_ENUM,
 969                      "glGetTexLevelParameter[if]v(pname)");
 970    }
 971
 972  out:
 973    _mesa_unlock_texture(ctx, texObj);
 974 }
 975
 976
 977
 978 void GLAPIENTRY
 979 _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
 980 {
 981    struct gl_texture_unit *texUnit;
 982    struct gl_texture_object *obj;
 983    GLboolean error = GL_FALSE;
 984    GET_CURRENT_CONTEXT(ctx);
 985    ASSERT_OUTSIDE_BEGIN_END(ctx);
 986
 987    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
 988       _mesa_error(ctx, GL_INVALID_OPERATION,
 989                   "glGetTexParameterfv(current unit)");
 990       return;
 991    }
 992
 993    texUnit = _mesa_get_current_tex_unit(ctx);
 994
 995    obj = _mesa_select_tex_object(ctx, texUnit, target);
 996    if (!obj) {
 997       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(target)");
 998       return;
 999    }
1000
1001    _mesa_lock_texture(ctx, obj);
1002    switch (pname) {
1003       case GL_TEXTURE_MAG_FILTER:
1004          *params = ENUM_TO_FLOAT(obj->MagFilter);
1005          break;
1006       case GL_TEXTURE_MIN_FILTER:
1007          *params = ENUM_TO_FLOAT(obj->MinFilter);
1008          break;
1009       case GL_TEXTURE_WRAP_S:
1010          *params = ENUM_TO_FLOAT(obj->WrapS);
1011          break;
1012       case GL_TEXTURE_WRAP_T:
1013          *params = ENUM_TO_FLOAT(obj->WrapT);
1014          break;
1015       case GL_TEXTURE_WRAP_R:
1016          *params = ENUM_TO_FLOAT(obj->WrapR);
1017          break;
1018       case GL_TEXTURE_BORDER_COLOR:
1019          params[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F);
1020          params[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F);
1021          params[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F);
1022          params[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F);
1023          break;
1024       case GL_TEXTURE_RESIDENT:
1025          {
1026             GLboolean resident;
1027             if (ctx->Driver.IsTextureResident)
1028                resident = ctx->Driver.IsTextureResident(ctx, obj);
1029             else
1030                resident = GL_TRUE;
1031             *params = ENUM_TO_FLOAT(resident);
1032          }
1033          break;
1034       case GL_TEXTURE_PRIORITY:
1035          *params = obj->Priority;
1036          break;
1037       case GL_TEXTURE_MIN_LOD:
1038          *params = obj->MinLod;
1039          break;
1040       case GL_TEXTURE_MAX_LOD:
1041          *params = obj->MaxLod;
1042          break;
1043       case GL_TEXTURE_BASE_LEVEL:
1044          *params = (GLfloat) obj->BaseLevel;
1045          break;
1046       case GL_TEXTURE_MAX_LEVEL:
1047          *params = (GLfloat) obj->MaxLevel;
1048          break;
1049       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1050          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1051             *params = obj->MaxAnisotropy;
1052          }
1053          else
1054             error = GL_TRUE;
1055          break;
1056       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1057          if (ctx->Extensions.ARB_shadow_ambient) {
1058             *params = obj->CompareFailValue;
1059          }
1060          else
1061             error = GL_TRUE;
1062          break;
1063       case GL_GENERATE_MIPMAP_SGIS:
1064          if (ctx->Extensions.SGIS_generate_mipmap) {
1065             *params = (GLfloat) obj->GenerateMipmap;
1066          }
1067          else
1068             error = GL_TRUE;
1069          break;
1070       case GL_TEXTURE_COMPARE_MODE_ARB:
1071          if (ctx->Extensions.ARB_shadow) {
1072             *params = (GLfloat) obj->CompareMode;
1073          }
1074          else
1075             error = GL_TRUE;
1076          break;
1077       case GL_TEXTURE_COMPARE_FUNC_ARB:
1078          if (ctx->Extensions.ARB_shadow) {
1079             *params = (GLfloat) obj->CompareFunc;
1080          }
1081          else
1082             error = GL_TRUE;
1083          break;
1084       case GL_DEPTH_TEXTURE_MODE_ARB:
1085          if (ctx->Extensions.ARB_depth_texture) {
1086             *params = (GLfloat) obj->DepthMode;
1087          }
1088          else
1089             error = GL_TRUE;
1090          break;
1091       case GL_TEXTURE_LOD_BIAS:
1092          if (ctx->Extensions.EXT_texture_lod_bias) {
1093             *params = obj->LodBias;
1094          }
1095          else
1096             error = GL_TRUE;
1097          break;
1098 #ifdef FEATURE_OES_draw_texture
1099       case GL_TEXTURE_CROP_RECT_OES:
1100          params[0] = obj->CropRect[0];
1101          params[1] = obj->CropRect[1];
1102          params[2] = obj->CropRect[2];
1103          params[3] = obj->CropRect[3];
1104          break;
1105 #endif
1106
1107       case GL_TEXTURE_SWIZZLE_R_EXT:
1108       case GL_TEXTURE_SWIZZLE_G_EXT:
1109       case GL_TEXTURE_SWIZZLE_B_EXT:
1110       case GL_TEXTURE_SWIZZLE_A_EXT:
1111          if (ctx->Extensions.EXT_texture_swizzle) {
1112             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1113             *params = (GLfloat) obj->Swizzle[comp];
1114          }
1115          else {
1116             error = GL_TRUE;
1117          }
1118          break;
1119
1120       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1121          if (ctx->Extensions.EXT_texture_swizzle) {
1122             GLuint comp;
1123             for (comp = 0; comp < 4; comp++) {
1124                params[comp] = (GLfloat) obj->Swizzle[comp];
1125             }
1126          }
1127          else {
1128             error = GL_TRUE;
1129          }
1130          break;
1131
1132       default:
1133          error = GL_TRUE;
1134          break;
1135    }
1136
1137    if (error)
1138       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)",
1139                   pname);
1140
1141    _mesa_unlock_texture(ctx, obj);
1142 }
1143
1144
1145 void GLAPIENTRY
1146 _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
1147 {
1148    struct gl_texture_unit *texUnit;
1149    struct gl_texture_object *obj;
1150    GLboolean error = GL_FALSE;
1151    GET_CURRENT_CONTEXT(ctx);
1152    ASSERT_OUTSIDE_BEGIN_END(ctx);
1153
1154    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
1155       _mesa_error(ctx, GL_INVALID_OPERATION,
1156                   "glGetTexParameteriv(current unit)");
1157       return;
1158    }
1159
1160    texUnit = _mesa_get_current_tex_unit(ctx);
1161
1162    obj = _mesa_select_tex_object(ctx, texUnit, target);
1163    if (!obj) {
1164       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(target)");
1165       return;
1166    }
1167
1168    _mesa_lock_texture(ctx, obj);
1169    switch (pname) {
1170       case GL_TEXTURE_MAG_FILTER:
1171          *params = (GLint) obj->MagFilter;
1172          break;;
1173       case GL_TEXTURE_MIN_FILTER:
1174          *params = (GLint) obj->MinFilter;
1175          break;;
1176       case GL_TEXTURE_WRAP_S:
1177          *params = (GLint) obj->WrapS;
1178          break;;
1179       case GL_TEXTURE_WRAP_T:
1180          *params = (GLint) obj->WrapT;
1181          break;;
1182       case GL_TEXTURE_WRAP_R:
1183          *params = (GLint) obj->WrapR;
1184          break;;
1185       case GL_TEXTURE_BORDER_COLOR:
1186          {
1187             GLfloat b[4];
1188             b[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F);
1189             b[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F);
1190             b[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F);
1191             b[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F);
1192             params[0] = FLOAT_TO_INT(b[0]);
1193             params[1] = FLOAT_TO_INT(b[1]);
1194             params[2] = FLOAT_TO_INT(b[2]);
1195             params[3] = FLOAT_TO_INT(b[3]);
1196          }
1197          break;;
1198       case GL_TEXTURE_RESIDENT:
1199          {
1200             GLboolean resident;
1201             if (ctx->Driver.IsTextureResident)
1202                resident = ctx->Driver.IsTextureResident(ctx, obj);
1203             else
1204                resident = GL_TRUE;
1205             *params = (GLint) resident;
1206          }
1207          break;;
1208       case GL_TEXTURE_PRIORITY:
1209          *params = FLOAT_TO_INT(obj->Priority);
1210          break;;
1211       case GL_TEXTURE_MIN_LOD:
1212          *params = (GLint) obj->MinLod;
1213          break;;
1214       case GL_TEXTURE_MAX_LOD:
1215          *params = (GLint) obj->MaxLod;
1216          break;;
1217       case GL_TEXTURE_BASE_LEVEL:
1218          *params = obj->BaseLevel;
1219          break;;
1220       case GL_TEXTURE_MAX_LEVEL:
1221          *params = obj->MaxLevel;
1222          break;;
1223       case GL_TEXTURE_MAX_ANISOTROPY_EXT:
1224          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
1225             *params = (GLint) obj->MaxAnisotropy;
1226          }
1227          else {
1228             error = GL_TRUE;
1229          }
1230          break;
1231       case GL_TEXTURE_COMPARE_FAIL_VALUE_ARB:
1232          if (ctx->Extensions.ARB_shadow_ambient) {
1233             *params = (GLint) FLOAT_TO_INT(obj->CompareFailValue);
1234          }
1235          else {
1236             error = GL_TRUE;
1237          }
1238          break;
1239       case GL_GENERATE_MIPMAP_SGIS:
1240          if (ctx->Extensions.SGIS_generate_mipmap) {
1241             *params = (GLint) obj->GenerateMipmap;
1242          }
1243          else {
1244             error = GL_TRUE;
1245          }
1246          break;
1247       case GL_TEXTURE_COMPARE_MODE_ARB:
1248          if (ctx->Extensions.ARB_shadow) {
1249             *params = (GLint) obj->CompareMode;
1250          }
1251          else {
1252             error = GL_TRUE;
1253          }
1254          break;
1255       case GL_TEXTURE_COMPARE_FUNC_ARB:
1256          if (ctx->Extensions.ARB_shadow) {
1257             *params = (GLint) obj->CompareFunc;
1258          }
1259          else {
1260             error = GL_TRUE;
1261          }
1262          break;
1263       case GL_DEPTH_TEXTURE_MODE_ARB:
1264          if (ctx->Extensions.ARB_depth_texture) {
1265             *params = (GLint) obj->DepthMode;
1266          }
1267          else {
1268             error = GL_TRUE;
1269          }
1270          break;
1271       case GL_TEXTURE_LOD_BIAS:
1272          if (ctx->Extensions.EXT_texture_lod_bias) {
1273             *params = (GLint) obj->LodBias;
1274          }
1275          else {
1276             error = GL_TRUE;
1277          }
1278          break;
1279 #ifdef FEATURE_OES_draw_texture
1280       case GL_TEXTURE_CROP_RECT_OES:
1281          params[0] = obj->CropRect[0];
1282          params[1] = obj->CropRect[1];
1283          params[2] = obj->CropRect[2];
1284          params[3] = obj->CropRect[3];
1285          break;
1286 #endif
1287       case GL_TEXTURE_SWIZZLE_R_EXT:
1288       case GL_TEXTURE_SWIZZLE_G_EXT:
1289       case GL_TEXTURE_SWIZZLE_B_EXT:
1290       case GL_TEXTURE_SWIZZLE_A_EXT:
1291          if (ctx->Extensions.EXT_texture_swizzle) {
1292             GLuint comp = pname - GL_TEXTURE_SWIZZLE_R_EXT;
1293             *params = obj->Swizzle[comp];
1294          }
1295          else {
1296             error = GL_TRUE;
1297          }
1298          break;
1299
1300       case GL_TEXTURE_SWIZZLE_RGBA_EXT:
1301          if (ctx->Extensions.EXT_texture_swizzle) {
1302             COPY_4V(params, obj->Swizzle);
1303          }
1304          else {
1305             error = GL_TRUE;
1306          }
1307          break;
1308
1309       default:
1310          ; /* silence warnings */
1311    }
1312
1313    if (error)
1314       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)",
1315                   pname);
1316
1317    _mesa_unlock_texture(ctx, obj);
1318 }