src/mesa/main/texobj.c

   1 /* $Id: texobj.c,v 1.35 2000/11/22 07:32:17 joukj Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   6  *
   7  * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 #ifdef PC_HEADER
  29 #include "all.h"
  30 #else
  31 #include "glheader.h"
  32 #include "colortab.h"
  33 #include "context.h"
  34 #include "enums.h"
  35 #include "hash.h"
  36 #include "macros.h"
  37 #include "mem.h"
  38 #include "teximage.h"
  39 #include "texstate.h"
  40 #include "texobj.h"
  41 #include "mtypes.h"
  42 #endif
  43
  44
  45
  46 /*
  47  * Allocate a new texture object and add it to the linked list of texture
  48  * objects.  If name>0 then also insert the new texture object into the hash
  49  * table.
  50  * Input:  shared - the shared GL state structure to contain the texture object
  51  *         name - integer name for the texture object
  52  *         dimensions - either 1, 2, 3 or 6 (cube map)
  53  *                      zero is ok for the sake of GenTextures()
  54  * Return:  pointer to new texture object
  55  */
  56 struct gl_texture_object *
  57 _mesa_alloc_texture_object( struct gl_shared_state *shared, GLuint name,
  58                             GLuint dimensions)
  59 {
  60    struct gl_texture_object *obj;
  61
  62    ASSERT(dimensions <= 3 || dimensions == 6);
  63
  64    obj = CALLOC_STRUCT(gl_texture_object);
  65
  66    if (obj) {
  67       /* init the non-zero fields */
  68       _glthread_INIT_MUTEX(obj->Mutex);
  69       obj->RefCount = 1;
  70       obj->Name = name;
  71       obj->Dimensions = dimensions;
  72       obj->Priority = 1.0F;
  73       obj->WrapS = GL_REPEAT;
  74       obj->WrapT = GL_REPEAT;
  75       obj->WrapR = GL_REPEAT;
  76       obj->MinFilter = GL_NEAREST_MIPMAP_LINEAR;
  77       obj->MagFilter = GL_LINEAR;
  78       obj->MinLod = -1000.0;
  79       obj->MaxLod = 1000.0;
  80       obj->BaseLevel = 0;
  81       obj->MaxLevel = 1000;
  82       _mesa_init_colortable(&obj->Palette);
  83
  84       /* insert into linked list */
  85       if (shared) {
  86          _glthread_LOCK_MUTEX(shared->Mutex);
  87          obj->Next = shared->TexObjectList;
  88          shared->TexObjectList = obj;
  89          _glthread_UNLOCK_MUTEX(shared->Mutex);
  90       }
  91
  92       if (name > 0) {
  93          /* insert into hash table */
  94          _mesa_HashInsert(shared->TexObjects, name, obj);
  95       }
  96    }
  97    return obj;
  98 }
  99
 100
 101 /*
 102  * Deallocate a texture object struct and remove it from the given
 103  * shared GL state.
 104  * Input:  shared - the shared GL state to which the object belongs
 105  *         t - the texture object to delete
 106  */
 107 void _mesa_free_texture_object( struct gl_shared_state *shared,
 108                                 struct gl_texture_object *t )
 109 {
 110    struct gl_texture_object *tprev, *tcurr;
 111
 112    assert(t);
 113
 114    /* unlink t from the linked list */
 115    if (shared) {
 116       _glthread_LOCK_MUTEX(shared->Mutex);
 117       tprev = NULL;
 118       tcurr = shared->TexObjectList;
 119       while (tcurr) {
 120          if (tcurr==t) {
 121             if (tprev) {
 122                tprev->Next = t->Next;
 123             }
 124             else {
 125                shared->TexObjectList = t->Next;
 126             }
 127             break;
 128          }
 129          tprev = tcurr;
 130          tcurr = tcurr->Next;
 131       }
 132       _glthread_UNLOCK_MUTEX(shared->Mutex);
 133    }
 134
 135    if (t->Name) {
 136       /* remove from hash table */
 137       _mesa_HashRemove(shared->TexObjects, t->Name);
 138    }
 139
 140    _mesa_free_colortable_data(&t->Palette);
 141
 142    /* free the texture images */
 143    {
 144       GLuint i;
 145       for (i=0;i<MAX_TEXTURE_LEVELS;i++) {
 146          if (t->Image[i]) {
 147             _mesa_free_texture_image( t->Image[i] );
 148          }
 149       }
 150    }
 151
 152    /* free this object */
 153    FREE( t );
 154 }
 155
 156
 157 /*
 158  * Report why a texture object is incomplete.  (for debug only)
 159  */
 160 #if 0
 161 static void
 162 incomplete(const struct gl_texture_object *t, const char *why)
 163 {
 164    printf("Texture Obj %d incomplete because: %s\n", t->Name, why);
 165 }
 166 #else
 167 #define incomplete(a, b)
 168 #endif
 169
 170
 171 /*
 172  * Examine a texture object to determine if it is complete.
 173  * The t->Complete flag will be set to GL_TRUE or GL_FALSE accordingly.
 174  */
 175 void
 176 _mesa_test_texobj_completeness( const GLcontext *ctx,
 177                                 struct gl_texture_object *t )
 178 {
 179    const GLint baseLevel = t->BaseLevel;
 180
 181    t->Complete = GL_TRUE;  /* be optimistic */
 182
 183    /* Always need the base level image */
 184    if (!t->Image[baseLevel]) {
 185       incomplete(t, "Image[baseLevel] == NULL");
 186       t->Complete = GL_FALSE;
 187       return;
 188    }
 189
 190    /* Compute number of mipmap levels */
 191    if (t->Dimensions == 1) {
 192       t->_P = t->Image[baseLevel]->WidthLog2;
 193    }
 194    else if (t->Dimensions == 2 || t->Dimensions == 6) {
 195       t->_P = MAX2(t->Image[baseLevel]->WidthLog2,
 196                    t->Image[baseLevel]->HeightLog2);
 197    }
 198    else if (t->Dimensions == 3) {
 199       GLint max = MAX2(t->Image[baseLevel]->WidthLog2,
 200                        t->Image[baseLevel]->HeightLog2);
 201       max = MAX2(max, (GLint)(t->Image[baseLevel]->DepthLog2));
 202       t->_P = max;
 203    }
 204
 205    /* Compute M (see the 1.2 spec) used during mipmapping */
 206    t->_M = (GLfloat) (MIN2(t->MaxLevel, t->_P) - t->BaseLevel);
 207
 208
 209    if (t->Dimensions == 6) {
 210       /* make sure that all six cube map level 0 images are the same size */
 211       const GLint w = t->Image[baseLevel]->Width2;
 212       const GLint h = t->Image[baseLevel]->Height2;
 213       if (!t->NegX[baseLevel] ||
 214           t->NegX[baseLevel]->Width2 != w ||
 215           t->NegX[baseLevel]->Height2 != h ||
 216           !t->PosY[baseLevel] ||
 217           t->PosY[baseLevel]->Width2 != w ||
 218           t->PosY[baseLevel]->Height2 != h ||
 219           !t->NegY[baseLevel] ||
 220           t->NegY[baseLevel]->Width2 != w ||
 221           t->NegY[baseLevel]->Height2 != h ||
 222           !t->PosZ[baseLevel] ||
 223           t->PosZ[baseLevel]->Width2 != w ||
 224           t->PosZ[baseLevel]->Height2 != h ||
 225           !t->NegZ[baseLevel] ||
 226           t->NegZ[baseLevel]->Width2 != w ||
 227           t->NegZ[baseLevel]->Height2 != h) {
 228          t->Complete = GL_FALSE;
 229          incomplete(t, "Non-quare cubemap image");
 230          return;
 231       }
 232    }
 233
 234    if (t->MinFilter != GL_NEAREST && t->MinFilter != GL_LINEAR) {
 235       /*
 236        * Mipmapping: determine if we have a complete set of mipmaps
 237        */
 238       GLint i;
 239       GLint minLevel = baseLevel;
 240       GLint maxLevel = MIN2(t->_P, ctx->Const.MaxTextureLevels-1);
 241       maxLevel = MIN2(maxLevel, t->MaxLevel);
 242
 243       if (minLevel > maxLevel) {
 244          t->Complete = GL_FALSE;
 245          incomplete(t, "minLevel > maxLevel");
 246          return;
 247       }
 248
 249       /* Test dimension-independent attributes */
 250       for (i = minLevel; i <= maxLevel; i++) {
 251          if (t->Image[i]) {
 252             if (t->Image[i]->Format != t->Image[baseLevel]->Format) {
 253                t->Complete = GL_FALSE;
 254                incomplete(t, "Format[i] != Format[baseLevel]");
 255                return;
 256             }
 257             if (t->Image[i]->Border != t->Image[baseLevel]->Border) {
 258                t->Complete = GL_FALSE;
 259                incomplete(t, "Border[i] != Border[baseLevel]");
 260                return;
 261             }
 262          }
 263       }
 264
 265       /* Test things which depend on number of texture image dimensions */
 266       if (t->Dimensions == 1) {
 267          /* Test 1-D mipmaps */
 268          GLuint width = t->Image[baseLevel]->Width2;
 269          for (i = baseLevel + 1; i < ctx->Const.MaxTextureLevels; i++) {
 270             if (width > 1) {
 271                width /= 2;
 272             }
 273             if (i >= minLevel && i <= maxLevel) {
 274                if (!t->Image[i]) {
 275                   t->Complete = GL_FALSE;
 276                   incomplete(t, "1D Image[i] == NULL");
 277                   return;
 278                }
 279                if (t->Image[i]->Width2 != width ) {
 280                   t->Complete = GL_FALSE;
 281                   incomplete(t, "1D Image[i] bad width");
 282                   return;
 283                }
 284             }
 285             if (width == 1) {
 286                return;  /* found smallest needed mipmap, all done! */
 287             }
 288          }
 289       }
 290       else if (t->Dimensions == 2) {
 291          /* Test 2-D mipmaps */
 292          GLuint width = t->Image[baseLevel]->Width2;
 293          GLuint height = t->Image[baseLevel]->Height2;
 294          for (i = baseLevel + 1; i < ctx->Const.MaxTextureLevels; i++) {
 295             if (width > 1) {
 296                width /= 2;
 297             }
 298             if (height > 1) {
 299                height /= 2;
 300             }
 301             if (i >= minLevel && i <= maxLevel) {
 302                if (!t->Image[i]) {
 303                   t->Complete = GL_FALSE;
 304                   incomplete(t, "2D Image[i] == NULL");
 305                   return;
 306                }
 307                if (t->Image[i]->Width2 != width) {
 308                   t->Complete = GL_FALSE;
 309                   incomplete(t, "2D Image[i] bad width");
 310                   return;
 311                }
 312                if (t->Image[i]->Height2 != height) {
 313                   t->Complete = GL_FALSE;
 314                   incomplete(t, "2D Image[i] bad height");
 315                   return;
 316                }
 317                if (width==1 && height==1) {
 318                   return;  /* found smallest needed mipmap, all done! */
 319                }
 320             }
 321          }
 322       }
 323       else if (t->Dimensions == 3) {
 324          /* Test 3-D mipmaps */
 325          GLuint width = t->Image[baseLevel]->Width2;
 326          GLuint height = t->Image[baseLevel]->Height2;
 327          GLuint depth = t->Image[baseLevel]->Depth2;
 328          for (i = baseLevel + 1; i < ctx->Const.MaxTextureLevels; i++) {
 329             if (width > 1) {
 330                width /= 2;
 331             }
 332             if (height > 1) {
 333                height /= 2;
 334             }
 335             if (depth > 1) {
 336                depth /= 2;
 337             }
 338             if (i >= minLevel && i <= maxLevel) {
 339                if (!t->Image[i]) {
 340                   incomplete(t, "3D Image[i] == NULL");
 341                   t->Complete = GL_FALSE;
 342                   return;
 343                }
 344                if (t->Image[i]->Width2 != width) {
 345                   t->Complete = GL_FALSE;
 346                   incomplete(t, "3D Image[i] bad width");
 347                   return;
 348                }
 349                if (t->Image[i]->Height2 != height) {
 350                   t->Complete = GL_FALSE;
 351                   incomplete(t, "3D Image[i] bad height");
 352                   return;
 353                }
 354                if (t->Image[i]->Depth2 != depth) {
 355                   t->Complete = GL_FALSE;
 356                   incomplete(t, "3D Image[i] bad depth");
 357                   return;
 358                }
 359             }
 360             if (width == 1 && height == 1 && depth == 1) {
 361                return;  /* found smallest needed mipmap, all done! */
 362             }
 363          }
 364       }
 365       else if (t->Dimensions == 6) {
 366          /* make sure 6 cube faces are consistant */
 367          GLuint width = t->Image[baseLevel]->Width2;
 368          GLuint height = t->Image[baseLevel]->Height2;
 369          for (i = baseLevel + 1; i < ctx->Const.MaxTextureLevels; i++) {
 370             if (width > 1) {
 371                width /= 2;
 372             }
 373             if (height > 1) {
 374                height /= 2;
 375             }
 376             if (i >= minLevel && i <= maxLevel) {
 377                /* check that we have images defined */
 378                if (!t->Image[i] || !t->NegX[i] ||
 379                    !t->PosY[i]  || !t->NegY[i] ||
 380                    !t->PosZ[i]  || !t->NegZ[i]) {
 381                   t->Complete = GL_FALSE;
 382                   incomplete(t, "CubeMap Image[i] == NULL");
 383                   return;
 384                }
 385                /* check that all six images have same size */
 386                if (t->NegX[i]->Width2!=width || t->NegX[i]->Height2!=height ||
 387                    t->PosY[i]->Width2!=width || t->PosY[i]->Height2!=height ||
 388                    t->NegY[i]->Width2!=width || t->NegY[i]->Height2!=height ||
 389                    t->PosZ[i]->Width2!=width || t->PosZ[i]->Height2!=height ||
 390                    t->NegZ[i]->Width2!=width || t->NegZ[i]->Height2!=height) {
 391                   t->Complete = GL_FALSE;
 392                   incomplete(t, "CubeMap Image[i] bad size");
 393                   return;
 394                }
 395             }
 396             if (width == 1 && height == 1) {
 397                return;  /* found smallest needed mipmap, all done! */
 398             }
 399          }
 400       }
 401       else {
 402          /* Dimensions = ??? */
 403          gl_problem(NULL, "Bug in gl_test_texture_object_completeness\n");
 404       }
 405    }
 406 }
 407
 408
 409 _glthread_DECLARE_STATIC_MUTEX(GenTexturesLock);
 410
 411
 412 /*
 413  * Execute glGenTextures
 414  */
 415 void
 416 _mesa_GenTextures( GLsizei n, GLuint *texName )
 417 {
 418    GET_CURRENT_CONTEXT(ctx);
 419    GLuint first;
 420    GLint i;
 421
 422    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGenTextures");
 423    if (n < 0) {
 424       gl_error( ctx, GL_INVALID_VALUE, "glGenTextures" );
 425       return;
 426    }
 427
 428    if (!texName)
 429       return;
 430
 431    /*
 432     * This must be atomic (generation and allocation of texture IDs)
 433     */
 434    _glthread_LOCK_MUTEX(GenTexturesLock);
 435
 436    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->TexObjects, n);
 437
 438    /* Return the texture names */
 439    for (i=0;i<n;i++) {
 440       texName[i] = first + i;
 441    }
 442
 443    /* Allocate new, empty texture objects */
 444    for (i=0;i<n;i++) {
 445       GLuint name = first + i;
 446       GLuint dims = 0;
 447       (void) _mesa_alloc_texture_object(ctx->Shared, name, dims);
 448    }
 449
 450    _glthread_UNLOCK_MUTEX(GenTexturesLock);
 451 }
 452
 453
 454
 455 /*
 456  * Execute glDeleteTextures
 457  */
 458 void
 459 _mesa_DeleteTextures( GLsizei n, const GLuint *texName)
 460 {
 461    GET_CURRENT_CONTEXT(ctx);
 462    GLint i;
 463
 464    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glDeleteTextures");
 465
 466    if (!texName)
 467       return;
 468
 469    for (i=0;i<n;i++) {
 470       if (texName[i] > 0) {
 471          struct gl_texture_object *delObj = (struct gl_texture_object *)
 472             _mesa_HashLookup(ctx->Shared->TexObjects, texName[i]);
 473          if (delObj) {
 474             /* First check if this texture is currently bound.
 475              * If so, unbind it and decrement the reference count.
 476              */
 477             GLuint u;
 478             for (u = 0; u < MAX_TEXTURE_UNITS; u++) {
 479                struct gl_texture_unit *unit = &ctx->Texture.Unit[u];
 480                if (delObj == unit->Current1D) {
 481                   unit->Current1D = ctx->Shared->Default1D;
 482                   ctx->Shared->Default1D->RefCount++;
 483                }
 484                else if (delObj == unit->Current2D) {
 485                   unit->Current2D = ctx->Shared->Default2D;
 486                   ctx->Shared->Default2D->RefCount++;
 487                }
 488                else if (delObj == unit->Current3D) {
 489                   unit->Current3D = ctx->Shared->Default3D;
 490                   ctx->Shared->Default3D->RefCount++;
 491                }
 492                else if (delObj == unit->CurrentCubeMap) {
 493                   unit->CurrentCubeMap = ctx->Shared->DefaultCubeMap;
 494                   ctx->Shared->DefaultCubeMap->RefCount++;
 495                }
 496             }
 497             ctx->NewState |= _NEW_TEXTURE;
 498
 499             /* Decrement reference count and delete if zero */
 500             delObj->RefCount--;
 501             ASSERT( delObj->RefCount >= 0 );
 502             if (delObj->RefCount == 0) {
 503                if (ctx->Driver.DeleteTexture)
 504                   (*ctx->Driver.DeleteTexture)( ctx, delObj );
 505                _mesa_free_texture_object(ctx->Shared, delObj);
 506             }
 507          }
 508       }
 509    }
 510 }
 511
 512
 513
 514 /*
 515  * Execute glBindTexture
 516  */
 517 void
 518 _mesa_BindTexture( GLenum target, GLuint texName )
 519 {
 520    GET_CURRENT_CONTEXT(ctx);
 521    GLuint unit = ctx->Texture.CurrentUnit;
 522    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
 523    struct gl_texture_object *oldTexObj;
 524    struct gl_texture_object *newTexObj;
 525    GLuint targetDim;
 526
 527    if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
 528       fprintf(stderr, "glBindTexture %s %d\n",
 529               gl_lookup_enum_by_nr(target), (GLint) texName);
 530
 531    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glBindTexture");
 532
 533    switch (target) {
 534       case GL_TEXTURE_1D:
 535          targetDim = 1;
 536          oldTexObj = texUnit->Current1D;
 537          break;
 538       case GL_TEXTURE_2D:
 539          targetDim = 2;
 540          oldTexObj = texUnit->Current2D;
 541          break;
 542       case GL_TEXTURE_3D:
 543          targetDim = 3;
 544          oldTexObj = texUnit->Current3D;
 545          break;
 546       case GL_TEXTURE_CUBE_MAP_ARB:
 547          if (ctx->Extensions.ARB_texture_cube_map) {
 548             targetDim = 6;
 549             oldTexObj = texUnit->CurrentCubeMap;
 550             break;
 551          }
 552          /* fallthrough */
 553       default:
 554          gl_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
 555          return;
 556    }
 557
 558    if (oldTexObj->Name == texName)
 559       return;   /* rebinding the same texture- no change */
 560
 561    /*
 562     * Get pointer to new texture object (newTexObj)
 563     */
 564    if (texName == 0) {
 565       /* newTexObj = a default texture object */
 566       switch (target) {
 567          case GL_TEXTURE_1D:
 568             newTexObj = ctx->Shared->Default1D;
 569             break;
 570          case GL_TEXTURE_2D:
 571             newTexObj = ctx->Shared->Default2D;
 572             break;
 573          case GL_TEXTURE_3D:
 574             newTexObj = ctx->Shared->Default3D;
 575             break;
 576          case GL_TEXTURE_CUBE_MAP_ARB:
 577             newTexObj = ctx->Shared->DefaultCubeMap;
 578             break;
 579          default:
 580             ; /* Bad targets are caught above */
 581       }
 582    }
 583    else {
 584       /* non-default texture object */
 585       const struct _mesa_HashTable *hash = ctx->Shared->TexObjects;
 586       newTexObj = (struct gl_texture_object *) _mesa_HashLookup(hash, texName);
 587       if (newTexObj) {
 588          /* error checking */
 589          if (newTexObj->Dimensions > 0 && newTexObj->Dimensions != targetDim) {
 590             /* the named texture object's dimensions don't match the target */
 591             gl_error( ctx, GL_INVALID_OPERATION, "glBindTexture" );
 592             return;
 593          }
 594       }
 595       else {
 596          /* if this is a new texture id, allocate a texture object now */
 597          newTexObj = _mesa_alloc_texture_object(ctx->Shared, texName, targetDim);
 598          if (!newTexObj) {
 599             gl_error(ctx, GL_OUT_OF_MEMORY, "glBindTexture");
 600             return;
 601          }
 602       }
 603       newTexObj->Dimensions = targetDim;
 604    }
 605
 606    newTexObj->RefCount++;
 607
 608    /* do the actual binding */
 609    switch (target) {
 610       case GL_TEXTURE_1D:
 611          texUnit->Current1D = newTexObj;
 612          break;
 613       case GL_TEXTURE_2D:
 614          texUnit->Current2D = newTexObj;
 615          break;
 616       case GL_TEXTURE_3D:
 617          texUnit->Current3D = newTexObj;
 618          break;
 619       case GL_TEXTURE_CUBE_MAP_ARB:
 620          texUnit->CurrentCubeMap = newTexObj;
 621          break;
 622       default:
 623          gl_problem(ctx, "bad target in BindTexture");
 624    }
 625
 626    ctx->NewState |= _NEW_TEXTURE;
 627
 628    /* Pass BindTexture call to device driver */
 629    if (ctx->Driver.BindTexture)
 630       (*ctx->Driver.BindTexture)( ctx, target, newTexObj );
 631
 632    if (oldTexObj->Name > 0) {
 633       /* never delete default (id=0) texture objects */
 634       oldTexObj->RefCount--;
 635       if (oldTexObj->RefCount <= 0) {
 636          if (ctx->Driver.DeleteTexture) {
 637             (*ctx->Driver.DeleteTexture)( ctx, oldTexObj );
 638          }
 639          _mesa_free_texture_object(ctx->Shared, oldTexObj);
 640       }
 641    }
 642 }
 643
 644
 645
 646 /*
 647  * Execute glPrioritizeTextures
 648  */
 649 void
 650 _mesa_PrioritizeTextures( GLsizei n, const GLuint *texName,
 651                           const GLclampf *priorities )
 652 {
 653    GET_CURRENT_CONTEXT(ctx);
 654    GLint i;
 655
 656    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPrioritizeTextures");
 657    if (n < 0) {
 658       gl_error( ctx, GL_INVALID_VALUE, "glPrioritizeTextures" );
 659       return;
 660    }
 661
 662    if (!priorities)
 663       return;
 664
 665    for (i = 0; i < n; i++) {
 666       if (texName[i] > 0) {
 667          struct gl_texture_object *t = (struct gl_texture_object *)
 668             _mesa_HashLookup(ctx->Shared->TexObjects, texName[i]);
 669          if (t) {
 670             t->Priority = CLAMP( priorities[i], 0.0F, 1.0F );
 671             if (ctx->Driver.PrioritizeTexture)
 672                ctx->Driver.PrioritizeTexture( ctx, t, t->Priority );
 673          }
 674       }
 675    }
 676
 677    ctx->NewState |= _NEW_TEXTURE;
 678 }
 679
 680
 681
 682 /*
 683  * Execute glAreTexturesResident
 684  */
 685 GLboolean
 686 _mesa_AreTexturesResident(GLsizei n, const GLuint *texName,
 687                           GLboolean *residences)
 688 {
 689    GET_CURRENT_CONTEXT(ctx);
 690    GLboolean allResident = GL_TRUE;
 691    GLint i;
 692
 693    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx,
 694                                             "glAreTexturesResident", GL_FALSE);
 695    if (n < 0) {
 696       gl_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident(n)");
 697       return GL_FALSE;
 698    }
 699
 700    if (!texName || !residences)
 701       return GL_FALSE;
 702
 703    for (i = 0; i < n; i++) {
 704       struct gl_texture_object *t;
 705       if (texName[i] == 0) {
 706          gl_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident(textures)");
 707          return GL_FALSE;
 708       }
 709       t = (struct gl_texture_object *)
 710          _mesa_HashLookup(ctx->Shared->TexObjects, texName[i]);
 711       if (t) {
 712          if (ctx->Driver.IsTextureResident) {
 713             residences[i] = ctx->Driver.IsTextureResident(ctx, t);
 714             if (!residences[i])
 715                allResident = GL_FALSE;
 716          }
 717          else {
 718             residences[i] = GL_TRUE;
 719          }
 720       }
 721       else {
 722          gl_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident(textures)");
 723          return GL_FALSE;
 724       }
 725    }
 726    return allResident;
 727 }
 728
 729
 730
 731 /*
 732  * Execute glIsTexture
 733  */
 734 GLboolean
 735 _mesa_IsTexture( GLuint texture )
 736 {
 737    GET_CURRENT_CONTEXT(ctx);
 738    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, "glIsTextures",
 739                                                   GL_FALSE);
 740    if (texture > 0 && _mesa_HashLookup(ctx->Shared->TexObjects, texture)) {
 741       return GL_TRUE;
 742    }
 743    else {
 744       return GL_FALSE;
 745    }
 746 }
 747