src/mesa/main/arrayobj.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * (C) Copyright IBM Corporation 2006
   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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  * OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 /**
  29  * \file arrayobj.c
  30  *
  31  * Implementation of Vertex Array Objects (VAOs), from OpenGL 3.1+ /
  32  * the GL_ARB_vertex_array_object extension.
  33  *
  34  * \todo
  35  * The code in this file borrows a lot from bufferobj.c.  There's a certain
  36  * amount of cruft left over from that origin that may be unnecessary.
  37  *
  38  * \author Ian Romanick <idr@us.ibm.com>
  39  * \author Brian Paul
  40  */
  41
  42
  43 #include "glheader.h"
  44 #include "hash.h"
  45 #include "image.h"
  46 #include "imports.h"
  47 #include "context.h"
  48 #include "bufferobj.h"
  49 #include "arrayobj.h"
  50 #include "macros.h"
  51 #include "mtypes.h"
  52 #include "state.h"
  53 #include "varray.h"
  54 #include "main/dispatch.h"
  55 #include "util/bitscan.h"
  56 #include "util/u_atomic.h"
  57
  58
  59 const GLubyte
  60 _mesa_vao_attribute_map[ATTRIBUTE_MAP_MODE_MAX][VERT_ATTRIB_MAX] =
  61 {
  62    /* ATTRIBUTE_MAP_MODE_IDENTITY
  63     *
  64     * Grab vertex processing attribute VERT_ATTRIB_POS from
  65     * the VAO attribute VERT_ATTRIB_POS, and grab vertex processing
  66     * attribute VERT_ATTRIB_GENERIC0 from the VAO attribute
  67     * VERT_ATTRIB_GENERIC0.
  68     */
  69    {
  70       VERT_ATTRIB_POS,                 /* VERT_ATTRIB_POS */
  71       VERT_ATTRIB_NORMAL,              /* VERT_ATTRIB_NORMAL */
  72       VERT_ATTRIB_COLOR0,              /* VERT_ATTRIB_COLOR0 */
  73       VERT_ATTRIB_COLOR1,              /* VERT_ATTRIB_COLOR1 */
  74       VERT_ATTRIB_FOG,                 /* VERT_ATTRIB_FOG */
  75       VERT_ATTRIB_COLOR_INDEX,         /* VERT_ATTRIB_COLOR_INDEX */
  76       VERT_ATTRIB_EDGEFLAG,            /* VERT_ATTRIB_EDGEFLAG */
  77       VERT_ATTRIB_TEX0,                /* VERT_ATTRIB_TEX0 */
  78       VERT_ATTRIB_TEX1,                /* VERT_ATTRIB_TEX1 */
  79       VERT_ATTRIB_TEX2,                /* VERT_ATTRIB_TEX2 */
  80       VERT_ATTRIB_TEX3,                /* VERT_ATTRIB_TEX3 */
  81       VERT_ATTRIB_TEX4,                /* VERT_ATTRIB_TEX4 */
  82       VERT_ATTRIB_TEX5,                /* VERT_ATTRIB_TEX5 */
  83       VERT_ATTRIB_TEX6,                /* VERT_ATTRIB_TEX6 */
  84       VERT_ATTRIB_TEX7,                /* VERT_ATTRIB_TEX7 */
  85       VERT_ATTRIB_POINT_SIZE,          /* VERT_ATTRIB_POINT_SIZE */
  86       VERT_ATTRIB_GENERIC0,            /* VERT_ATTRIB_GENERIC0 */
  87       VERT_ATTRIB_GENERIC1,            /* VERT_ATTRIB_GENERIC1 */
  88       VERT_ATTRIB_GENERIC2,            /* VERT_ATTRIB_GENERIC2 */
  89       VERT_ATTRIB_GENERIC3,            /* VERT_ATTRIB_GENERIC3 */
  90       VERT_ATTRIB_GENERIC4,            /* VERT_ATTRIB_GENERIC4 */
  91       VERT_ATTRIB_GENERIC5,            /* VERT_ATTRIB_GENERIC5 */
  92       VERT_ATTRIB_GENERIC6,            /* VERT_ATTRIB_GENERIC6 */
  93       VERT_ATTRIB_GENERIC7,            /* VERT_ATTRIB_GENERIC7 */
  94       VERT_ATTRIB_GENERIC8,            /* VERT_ATTRIB_GENERIC8 */
  95       VERT_ATTRIB_GENERIC9,            /* VERT_ATTRIB_GENERIC9 */
  96       VERT_ATTRIB_GENERIC10,           /* VERT_ATTRIB_GENERIC10 */
  97       VERT_ATTRIB_GENERIC11,           /* VERT_ATTRIB_GENERIC11 */
  98       VERT_ATTRIB_GENERIC12,           /* VERT_ATTRIB_GENERIC12 */
  99       VERT_ATTRIB_GENERIC13,           /* VERT_ATTRIB_GENERIC13 */
 100       VERT_ATTRIB_GENERIC14,           /* VERT_ATTRIB_GENERIC14 */
 101       VERT_ATTRIB_GENERIC15            /* VERT_ATTRIB_GENERIC15 */
 102    },
 103
 104    /* ATTRIBUTE_MAP_MODE_POSITION
 105     *
 106     * Grab vertex processing attribute VERT_ATTRIB_POS as well as
 107     * vertex processing attribute VERT_ATTRIB_GENERIC0 from the
 108     * VAO attribute VERT_ATTRIB_POS.
 109     */
 110    {
 111       VERT_ATTRIB_POS,                 /* VERT_ATTRIB_POS */
 112       VERT_ATTRIB_NORMAL,              /* VERT_ATTRIB_NORMAL */
 113       VERT_ATTRIB_COLOR0,              /* VERT_ATTRIB_COLOR0 */
 114       VERT_ATTRIB_COLOR1,              /* VERT_ATTRIB_COLOR1 */
 115       VERT_ATTRIB_FOG,                 /* VERT_ATTRIB_FOG */
 116       VERT_ATTRIB_COLOR_INDEX,         /* VERT_ATTRIB_COLOR_INDEX */
 117       VERT_ATTRIB_EDGEFLAG,            /* VERT_ATTRIB_EDGEFLAG */
 118       VERT_ATTRIB_TEX0,                /* VERT_ATTRIB_TEX0 */
 119       VERT_ATTRIB_TEX1,                /* VERT_ATTRIB_TEX1 */
 120       VERT_ATTRIB_TEX2,                /* VERT_ATTRIB_TEX2 */
 121       VERT_ATTRIB_TEX3,                /* VERT_ATTRIB_TEX3 */
 122       VERT_ATTRIB_TEX4,                /* VERT_ATTRIB_TEX4 */
 123       VERT_ATTRIB_TEX5,                /* VERT_ATTRIB_TEX5 */
 124       VERT_ATTRIB_TEX6,                /* VERT_ATTRIB_TEX6 */
 125       VERT_ATTRIB_TEX7,                /* VERT_ATTRIB_TEX7 */
 126       VERT_ATTRIB_POINT_SIZE,          /* VERT_ATTRIB_POINT_SIZE */
 127       VERT_ATTRIB_POS,                 /* VERT_ATTRIB_GENERIC0 */
 128       VERT_ATTRIB_GENERIC1,            /* VERT_ATTRIB_GENERIC1 */
 129       VERT_ATTRIB_GENERIC2,            /* VERT_ATTRIB_GENERIC2 */
 130       VERT_ATTRIB_GENERIC3,            /* VERT_ATTRIB_GENERIC3 */
 131       VERT_ATTRIB_GENERIC4,            /* VERT_ATTRIB_GENERIC4 */
 132       VERT_ATTRIB_GENERIC5,            /* VERT_ATTRIB_GENERIC5 */
 133       VERT_ATTRIB_GENERIC6,            /* VERT_ATTRIB_GENERIC6 */
 134       VERT_ATTRIB_GENERIC7,            /* VERT_ATTRIB_GENERIC7 */
 135       VERT_ATTRIB_GENERIC8,            /* VERT_ATTRIB_GENERIC8 */
 136       VERT_ATTRIB_GENERIC9,            /* VERT_ATTRIB_GENERIC9 */
 137       VERT_ATTRIB_GENERIC10,           /* VERT_ATTRIB_GENERIC10 */
 138       VERT_ATTRIB_GENERIC11,           /* VERT_ATTRIB_GENERIC11 */
 139       VERT_ATTRIB_GENERIC12,           /* VERT_ATTRIB_GENERIC12 */
 140       VERT_ATTRIB_GENERIC13,           /* VERT_ATTRIB_GENERIC13 */
 141       VERT_ATTRIB_GENERIC14,           /* VERT_ATTRIB_GENERIC14 */
 142       VERT_ATTRIB_GENERIC15            /* VERT_ATTRIB_GENERIC15 */
 143    },
 144
 145    /* ATTRIBUTE_MAP_MODE_GENERIC0
 146     *
 147     * Grab vertex processing attribute VERT_ATTRIB_POS as well as
 148     * vertex processing attribute VERT_ATTRIB_GENERIC0 from the
 149     * VAO attribute VERT_ATTRIB_GENERIC0.
 150     */
 151    {
 152       VERT_ATTRIB_GENERIC0,            /* VERT_ATTRIB_POS */
 153       VERT_ATTRIB_NORMAL,              /* VERT_ATTRIB_NORMAL */
 154       VERT_ATTRIB_COLOR0,              /* VERT_ATTRIB_COLOR0 */
 155       VERT_ATTRIB_COLOR1,              /* VERT_ATTRIB_COLOR1 */
 156       VERT_ATTRIB_FOG,                 /* VERT_ATTRIB_FOG */
 157       VERT_ATTRIB_COLOR_INDEX,         /* VERT_ATTRIB_COLOR_INDEX */
 158       VERT_ATTRIB_EDGEFLAG,            /* VERT_ATTRIB_EDGEFLAG */
 159       VERT_ATTRIB_TEX0,                /* VERT_ATTRIB_TEX0 */
 160       VERT_ATTRIB_TEX1,                /* VERT_ATTRIB_TEX1 */
 161       VERT_ATTRIB_TEX2,                /* VERT_ATTRIB_TEX2 */
 162       VERT_ATTRIB_TEX3,                /* VERT_ATTRIB_TEX3 */
 163       VERT_ATTRIB_TEX4,                /* VERT_ATTRIB_TEX4 */
 164       VERT_ATTRIB_TEX5,                /* VERT_ATTRIB_TEX5 */
 165       VERT_ATTRIB_TEX6,                /* VERT_ATTRIB_TEX6 */
 166       VERT_ATTRIB_TEX7,                /* VERT_ATTRIB_TEX7 */
 167       VERT_ATTRIB_POINT_SIZE,          /* VERT_ATTRIB_POINT_SIZE */
 168       VERT_ATTRIB_GENERIC0,            /* VERT_ATTRIB_GENERIC0 */
 169       VERT_ATTRIB_GENERIC1,            /* VERT_ATTRIB_GENERIC1 */
 170       VERT_ATTRIB_GENERIC2,            /* VERT_ATTRIB_GENERIC2 */
 171       VERT_ATTRIB_GENERIC3,            /* VERT_ATTRIB_GENERIC3 */
 172       VERT_ATTRIB_GENERIC4,            /* VERT_ATTRIB_GENERIC4 */
 173       VERT_ATTRIB_GENERIC5,            /* VERT_ATTRIB_GENERIC5 */
 174       VERT_ATTRIB_GENERIC6,            /* VERT_ATTRIB_GENERIC6 */
 175       VERT_ATTRIB_GENERIC7,            /* VERT_ATTRIB_GENERIC7 */
 176       VERT_ATTRIB_GENERIC8,            /* VERT_ATTRIB_GENERIC8 */
 177       VERT_ATTRIB_GENERIC9,            /* VERT_ATTRIB_GENERIC9 */
 178       VERT_ATTRIB_GENERIC10,           /* VERT_ATTRIB_GENERIC10 */
 179       VERT_ATTRIB_GENERIC11,           /* VERT_ATTRIB_GENERIC11 */
 180       VERT_ATTRIB_GENERIC12,           /* VERT_ATTRIB_GENERIC12 */
 181       VERT_ATTRIB_GENERIC13,           /* VERT_ATTRIB_GENERIC13 */
 182       VERT_ATTRIB_GENERIC14,           /* VERT_ATTRIB_GENERIC14 */
 183       VERT_ATTRIB_GENERIC15            /* VERT_ATTRIB_GENERIC15 */
 184    }
 185 };
 186
 187
 188 /**
 189  * Look up the array object for the given ID.
 190  *
 191  * \returns
 192  * Either a pointer to the array object with the specified ID or \c NULL for
 193  * a non-existent ID.  The spec defines ID 0 as being technically
 194  * non-existent.
 195  */
 196
 197 struct gl_vertex_array_object *
 198 _mesa_lookup_vao(struct gl_context *ctx, GLuint id)
 199 {
 200    if (id == 0) {
 201       return NULL;
 202    } else {
 203       struct gl_vertex_array_object *vao;
 204
 205       if (ctx->Array.LastLookedUpVAO &&
 206           ctx->Array.LastLookedUpVAO->Name == id) {
 207          vao = ctx->Array.LastLookedUpVAO;
 208       } else {
 209          vao = (struct gl_vertex_array_object *)
 210             _mesa_HashLookupLocked(ctx->Array.Objects, id);
 211
 212          _mesa_reference_vao(ctx, &ctx->Array.LastLookedUpVAO, vao);
 213       }
 214
 215       return vao;
 216    }
 217 }
 218
 219
 220 /**
 221  * Looks up the array object for the given ID.
 222  *
 223  * Unlike _mesa_lookup_vao, this function generates a GL_INVALID_OPERATION
 224  * error if the array object does not exist. It also returns the default
 225  * array object when ctx is a compatibility profile context and id is zero.
 226  */
 227 struct gl_vertex_array_object *
 228 _mesa_lookup_vao_err(struct gl_context *ctx, GLuint id, const char *caller)
 229 {
 230    /* The ARB_direct_state_access specification says:
 231     *
 232     *    "<vaobj> is [compatibility profile:
 233     *     zero, indicating the default vertex array object, or]
 234     *     the name of the vertex array object."
 235     */
 236    if (id == 0) {
 237       if (ctx->API == API_OPENGL_CORE) {
 238          _mesa_error(ctx, GL_INVALID_OPERATION,
 239                      "%s(zero is not valid vaobj name in a core profile "
 240                      "context)", caller);
 241          return NULL;
 242       }
 243
 244       return ctx->Array.DefaultVAO;
 245    } else {
 246       struct gl_vertex_array_object *vao;
 247
 248       if (ctx->Array.LastLookedUpVAO &&
 249           ctx->Array.LastLookedUpVAO->Name == id) {
 250          vao = ctx->Array.LastLookedUpVAO;
 251       } else {
 252          vao = (struct gl_vertex_array_object *)
 253             _mesa_HashLookupLocked(ctx->Array.Objects, id);
 254
 255          /* The ARB_direct_state_access specification says:
 256           *
 257           *    "An INVALID_OPERATION error is generated if <vaobj> is not
 258           *     [compatibility profile: zero or] the name of an existing
 259           *     vertex array object."
 260           */
 261          if (!vao || !vao->EverBound) {
 262             _mesa_error(ctx, GL_INVALID_OPERATION,
 263                         "%s(non-existent vaobj=%u)", caller, id);
 264             return NULL;
 265          }
 266
 267          _mesa_reference_vao(ctx, &ctx->Array.LastLookedUpVAO, vao);
 268       }
 269
 270       return vao;
 271    }
 272 }
 273
 274
 275 /**
 276  * For all the vertex binding points in the array object, unbind any pointers
 277  * to any buffer objects (VBOs).
 278  * This is done just prior to array object destruction.
 279  */
 280 static void
 281 unbind_array_object_vbos(struct gl_context *ctx, struct gl_vertex_array_object *obj)
 282 {
 283    GLuint i;
 284
 285    for (i = 0; i < ARRAY_SIZE(obj->BufferBinding); i++)
 286       _mesa_reference_buffer_object(ctx, &obj->BufferBinding[i].BufferObj, NULL);
 287 }
 288
 289
 290 /**
 291  * Allocate and initialize a new vertex array object.
 292  */
 293 struct gl_vertex_array_object *
 294 _mesa_new_vao(struct gl_context *ctx, GLuint name)
 295 {
 296    struct gl_vertex_array_object *obj = CALLOC_STRUCT(gl_vertex_array_object);
 297    if (obj)
 298       _mesa_initialize_vao(ctx, obj, name);
 299    return obj;
 300 }
 301
 302
 303 /**
 304  * Delete an array object.
 305  */
 306 void
 307 _mesa_delete_vao(struct gl_context *ctx, struct gl_vertex_array_object *obj)
 308 {
 309    unbind_array_object_vbos(ctx, obj);
 310    _mesa_reference_buffer_object(ctx, &obj->IndexBufferObj, NULL);
 311    free(obj->Label);
 312    free(obj);
 313 }
 314
 315
 316 /**
 317  * Set ptr to vao w/ reference counting.
 318  * Note: this should only be called from the _mesa_reference_vao()
 319  * inline function.
 320  */
 321 void
 322 _mesa_reference_vao_(struct gl_context *ctx,
 323                      struct gl_vertex_array_object **ptr,
 324                      struct gl_vertex_array_object *vao)
 325 {
 326    assert(*ptr != vao);
 327
 328    if (*ptr) {
 329       /* Unreference the old array object */
 330       struct gl_vertex_array_object *oldObj = *ptr;
 331
 332       bool deleteFlag;
 333       if (oldObj->SharedAndImmutable) {
 334          deleteFlag = p_atomic_dec_zero(&oldObj->RefCount);
 335       } else {
 336          assert(oldObj->RefCount > 0);
 337          oldObj->RefCount--;
 338          deleteFlag = (oldObj->RefCount == 0);
 339       }
 340
 341       if (deleteFlag)
 342          _mesa_delete_vao(ctx, oldObj);
 343
 344       *ptr = NULL;
 345    }
 346    assert(!*ptr);
 347
 348    if (vao) {
 349       /* reference new array object */
 350       if (vao->SharedAndImmutable) {
 351          p_atomic_inc(&vao->RefCount);
 352       } else {
 353          assert(vao->RefCount > 0);
 354          vao->RefCount++;
 355       }
 356
 357       *ptr = vao;
 358    }
 359 }
 360
 361
 362 /**
 363  * Initialize attributes of a vertex array within a vertex array object.
 364  * \param vao  the container vertex array object
 365  * \param index  which array in the VAO to initialize
 366  * \param size  number of components (1, 2, 3 or 4) per attribute
 367  * \param type  datatype of the attribute (GL_FLOAT, GL_INT, etc).
 368  */
 369 static void
 370 init_array(struct gl_context *ctx,
 371            struct gl_vertex_array_object *vao,
 372            gl_vert_attrib index, GLint size, GLint type)
 373 {
 374    assert(index < ARRAY_SIZE(vao->VertexAttrib));
 375    struct gl_array_attributes *array = &vao->VertexAttrib[index];
 376    assert(index < ARRAY_SIZE(vao->BufferBinding));
 377    struct gl_vertex_buffer_binding *binding = &vao->BufferBinding[index];
 378
 379    array->Size = size;
 380    array->Type = type;
 381    array->Format = GL_RGBA; /* only significant for GL_EXT_vertex_array_bgra */
 382    array->Stride = 0;
 383    array->Ptr = NULL;
 384    array->RelativeOffset = 0;
 385    array->Enabled = GL_FALSE;
 386    array->Normalized = GL_FALSE;
 387    array->Integer = GL_FALSE;
 388    array->Doubles = GL_FALSE;
 389    array->_ElementSize = size * _mesa_sizeof_type(type);
 390    ASSERT_BITFIELD_SIZE(struct gl_array_attributes, BufferBindingIndex,
 391                         VERT_ATTRIB_MAX - 1);
 392    array->BufferBindingIndex = index;
 393
 394    binding->Offset = 0;
 395    binding->Stride = array->_ElementSize;
 396    binding->BufferObj = NULL;
 397    binding->_BoundArrays = BITFIELD_BIT(index);
 398
 399    /* Vertex array buffers */
 400    _mesa_reference_buffer_object(ctx, &binding->BufferObj,
 401                                  ctx->Shared->NullBufferObj);
 402 }
 403
 404
 405 /**
 406  * Initialize a gl_vertex_array_object's arrays.
 407  */
 408 void
 409 _mesa_initialize_vao(struct gl_context *ctx,
 410                      struct gl_vertex_array_object *vao,
 411                      GLuint name)
 412 {
 413    GLuint i;
 414
 415    vao->Name = name;
 416
 417    vao->RefCount = 1;
 418    vao->SharedAndImmutable = false;
 419
 420    /* Init the individual arrays */
 421    for (i = 0; i < ARRAY_SIZE(vao->VertexAttrib); i++) {
 422       switch (i) {
 423       case VERT_ATTRIB_NORMAL:
 424          init_array(ctx, vao, VERT_ATTRIB_NORMAL, 3, GL_FLOAT);
 425          break;
 426       case VERT_ATTRIB_COLOR1:
 427          init_array(ctx, vao, VERT_ATTRIB_COLOR1, 3, GL_FLOAT);
 428          break;
 429       case VERT_ATTRIB_FOG:
 430          init_array(ctx, vao, VERT_ATTRIB_FOG, 1, GL_FLOAT);
 431          break;
 432       case VERT_ATTRIB_COLOR_INDEX:
 433          init_array(ctx, vao, VERT_ATTRIB_COLOR_INDEX, 1, GL_FLOAT);
 434          break;
 435       case VERT_ATTRIB_EDGEFLAG:
 436          init_array(ctx, vao, VERT_ATTRIB_EDGEFLAG, 1, GL_BOOL);
 437          break;
 438       case VERT_ATTRIB_POINT_SIZE:
 439          init_array(ctx, vao, VERT_ATTRIB_POINT_SIZE, 1, GL_FLOAT);
 440          break;
 441       default:
 442          init_array(ctx, vao, i, 4, GL_FLOAT);
 443          break;
 444       }
 445    }
 446
 447    vao->_AttributeMapMode = ATTRIBUTE_MAP_MODE_IDENTITY;
 448
 449    _mesa_reference_buffer_object(ctx, &vao->IndexBufferObj,
 450                                  ctx->Shared->NullBufferObj);
 451 }
 452
 453
 454 /**
 455  * Updates the derived gl_vertex_arrays when a gl_array_attributes
 456  * or a gl_vertex_buffer_binding has changed.
 457  */
 458 void
 459 _mesa_update_vao_derived_arrays(struct gl_context *ctx,
 460                                 struct gl_vertex_array_object *vao)
 461 {
 462    /* Make sure we do not run into problems with shared objects */
 463    assert(!vao->SharedAndImmutable || vao->NewArrays == 0);
 464
 465    /*
 466     * Stay tuned, the next series scans for duplicate bindings in this
 467     * function. So that drivers can easily know the minimum unique set
 468     * of bindings.
 469     */
 470 }
 471
 472
 473 void
 474 _mesa_set_vao_immutable(struct gl_context *ctx,
 475                         struct gl_vertex_array_object *vao)
 476 {
 477    _mesa_update_vao_derived_arrays(ctx, vao);
 478    vao->NewArrays = 0;
 479    vao->SharedAndImmutable = true;
 480 }
 481
 482
 483 bool
 484 _mesa_all_varyings_in_vbos(const struct gl_vertex_array_object *vao)
 485 {
 486    /* Walk those enabled arrays that have the default vbo attached */
 487    GLbitfield mask = vao->_Enabled & ~vao->VertexAttribBufferMask;
 488
 489    while (mask) {
 490       /* Do not use u_bit_scan64 as we can walk multiple
 491        * attrib arrays at once
 492        */
 493       const int i = ffs(mask) - 1;
 494       const struct gl_array_attributes *attrib_array =
 495          &vao->VertexAttrib[i];
 496       const struct gl_vertex_buffer_binding *buffer_binding =
 497          &vao->BufferBinding[attrib_array->BufferBindingIndex];
 498
 499       /* Only enabled arrays shall appear in the _Enabled bitmask */
 500       assert(attrib_array->Enabled);
 501       /* We have already masked out vao->VertexAttribBufferMask  */
 502       assert(!_mesa_is_bufferobj(buffer_binding->BufferObj));
 503
 504       /* Bail out once we find the first non vbo with a non zero stride */
 505       if (buffer_binding->Stride != 0)
 506          return false;
 507
 508       /* Note that we cannot use the xor variant since the _BoundArray mask
 509        * may contain array attributes that are bound but not enabled.
 510        */
 511       mask &= ~buffer_binding->_BoundArrays;
 512    }
 513
 514    return true;
 515 }
 516
 517 bool
 518 _mesa_all_buffers_are_unmapped(const struct gl_vertex_array_object *vao)
 519 {
 520    /* Walk the enabled arrays that have a vbo attached */
 521    GLbitfield mask = vao->_Enabled & vao->VertexAttribBufferMask;
 522
 523    while (mask) {
 524       const int i = ffs(mask) - 1;
 525       const struct gl_array_attributes *attrib_array =
 526          &vao->VertexAttrib[i];
 527       const struct gl_vertex_buffer_binding *buffer_binding =
 528          &vao->BufferBinding[attrib_array->BufferBindingIndex];
 529
 530       /* Only enabled arrays shall appear in the _Enabled bitmask */
 531       assert(attrib_array->Enabled);
 532       /* We have already masked with vao->VertexAttribBufferMask  */
 533       assert(_mesa_is_bufferobj(buffer_binding->BufferObj));
 534
 535       /* Bail out once we find the first disallowed mapping */
 536       if (_mesa_check_disallowed_mapping(buffer_binding->BufferObj))
 537          return false;
 538
 539       /* We have handled everything that is bound to this buffer_binding. */
 540       mask &= ~buffer_binding->_BoundArrays;
 541    }
 542
 543    return true;
 544 }
 545
 546 /**********************************************************************/
 547 /* API Functions                                                      */
 548 /**********************************************************************/
 549
 550
 551 /**
 552  * ARB version of glBindVertexArray()
 553  */
 554 static ALWAYS_INLINE void
 555 bind_vertex_array(struct gl_context *ctx, GLuint id, bool no_error)
 556 {
 557    struct gl_vertex_array_object *const oldObj = ctx->Array.VAO;
 558    struct gl_vertex_array_object *newObj = NULL;
 559
 560    assert(oldObj != NULL);
 561
 562    if (oldObj->Name == id)
 563       return;   /* rebinding the same array object- no change */
 564
 565    /*
 566     * Get pointer to new array object (newObj)
 567     */
 568    if (id == 0) {
 569       /* The spec says there is no array object named 0, but we use
 570        * one internally because it simplifies things.
 571        */
 572       newObj = ctx->Array.DefaultVAO;
 573    }
 574    else {
 575       /* non-default array object */
 576       newObj = _mesa_lookup_vao(ctx, id);
 577       if (!no_error && !newObj) {
 578          _mesa_error(ctx, GL_INVALID_OPERATION,
 579                      "glBindVertexArray(non-gen name)");
 580          return;
 581       }
 582
 583       newObj->EverBound = GL_TRUE;
 584    }
 585
 586    /* The _DrawArrays pointer is pointing at the VAO being unbound and
 587     * that VAO may be in the process of being deleted. If it's not going
 588     * to be deleted, this will have no effect, because the pointer needs
 589     * to be updated by the VBO module anyway.
 590     *
 591     * Before the VBO module can update the pointer, we have to set it
 592     * to NULL for drivers not to set up arrays which are not bound,
 593     * or to prevent a crash if the VAO being unbound is going to be
 594     * deleted.
 595     */
 596    _mesa_set_drawing_arrays(ctx, NULL);
 597    _mesa_set_draw_vao(ctx, ctx->Array._EmptyVAO, 0);
 598
 599    ctx->NewState |= _NEW_ARRAY;
 600    _mesa_reference_vao(ctx, &ctx->Array.VAO, newObj);
 601 }
 602
 603
 604 void GLAPIENTRY
 605 _mesa_BindVertexArray_no_error(GLuint id)
 606 {
 607    GET_CURRENT_CONTEXT(ctx);
 608    bind_vertex_array(ctx, id, true);
 609 }
 610
 611
 612 void GLAPIENTRY
 613 _mesa_BindVertexArray(GLuint id)
 614 {
 615    GET_CURRENT_CONTEXT(ctx);
 616    bind_vertex_array(ctx, id, false);
 617 }
 618
 619
 620 /**
 621  * Delete a set of array objects.
 622  *
 623  * \param n      Number of array objects to delete.
 624  * \param ids    Array of \c n array object IDs.
 625  */
 626 static void
 627 delete_vertex_arrays(struct gl_context *ctx, GLsizei n, const GLuint *ids)
 628 {
 629    GLsizei i;
 630
 631    for (i = 0; i < n; i++) {
 632       struct gl_vertex_array_object *obj = _mesa_lookup_vao(ctx, ids[i]);
 633
 634       if (obj) {
 635          assert(obj->Name == ids[i]);
 636
 637          /* If the array object is currently bound, the spec says "the binding
 638           * for that object reverts to zero and the default vertex array
 639           * becomes current."
 640           */
 641          if (obj == ctx->Array.VAO)
 642             _mesa_BindVertexArray_no_error(0);
 643
 644          /* The ID is immediately freed for re-use */
 645          _mesa_HashRemoveLocked(ctx->Array.Objects, obj->Name);
 646
 647          if (ctx->Array.LastLookedUpVAO == obj)
 648             _mesa_reference_vao(ctx, &ctx->Array.LastLookedUpVAO, NULL);
 649          if (ctx->Array._DrawVAO == obj)
 650             _mesa_set_draw_vao(ctx, ctx->Array._EmptyVAO, 0);
 651
 652          /* Unreference the array object.
 653           * If refcount hits zero, the object will be deleted.
 654           */
 655          _mesa_reference_vao(ctx, &obj, NULL);
 656       }
 657    }
 658 }
 659
 660
 661 void GLAPIENTRY
 662 _mesa_DeleteVertexArrays_no_error(GLsizei n, const GLuint *ids)
 663 {
 664    GET_CURRENT_CONTEXT(ctx);
 665    delete_vertex_arrays(ctx, n, ids);
 666 }
 667
 668
 669 void GLAPIENTRY
 670 _mesa_DeleteVertexArrays(GLsizei n, const GLuint *ids)
 671 {
 672    GET_CURRENT_CONTEXT(ctx);
 673
 674    if (n < 0) {
 675       _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteVertexArray(n)");
 676       return;
 677    }
 678
 679    delete_vertex_arrays(ctx, n, ids);
 680 }
 681
 682
 683 /**
 684  * Generate a set of unique array object IDs and store them in \c arrays.
 685  * Helper for _mesa_GenVertexArrays() and _mesa_CreateVertexArrays()
 686  * below.
 687  *
 688  * \param n       Number of IDs to generate.
 689  * \param arrays  Array of \c n locations to store the IDs.
 690  * \param create  Indicates that the objects should also be created.
 691  * \param func    The name of the GL entry point.
 692  */
 693 static void
 694 gen_vertex_arrays(struct gl_context *ctx, GLsizei n, GLuint *arrays,
 695                   bool create, const char *func)
 696 {
 697    GLuint first;
 698    GLint i;
 699
 700    if (!arrays)
 701       return;
 702
 703    first = _mesa_HashFindFreeKeyBlock(ctx->Array.Objects, n);
 704
 705    /* For the sake of simplicity we create the array objects in both
 706     * the Gen* and Create* cases.  The only difference is the value of
 707     * EverBound, which is set to true in the Create* case.
 708     */
 709    for (i = 0; i < n; i++) {
 710       struct gl_vertex_array_object *obj;
 711       GLuint name = first + i;
 712
 713       obj = _mesa_new_vao(ctx, name);
 714       if (!obj) {
 715          _mesa_error(ctx, GL_OUT_OF_MEMORY, "%s", func);
 716          return;
 717       }
 718       obj->EverBound = create;
 719       _mesa_HashInsertLocked(ctx->Array.Objects, obj->Name, obj);
 720       arrays[i] = first + i;
 721    }
 722 }
 723
 724
 725 static void
 726 gen_vertex_arrays_err(struct gl_context *ctx, GLsizei n, GLuint *arrays,
 727                       bool create, const char *func)
 728 {
 729    if (n < 0) {
 730       _mesa_error(ctx, GL_INVALID_VALUE, "%s(n < 0)", func);
 731       return;
 732    }
 733
 734    gen_vertex_arrays(ctx, n, arrays, create, func);
 735 }
 736
 737
 738 /**
 739  * ARB version of glGenVertexArrays()
 740  * All arrays will be required to live in VBOs.
 741  */
 742 void GLAPIENTRY
 743 _mesa_GenVertexArrays_no_error(GLsizei n, GLuint *arrays)
 744 {
 745    GET_CURRENT_CONTEXT(ctx);
 746    gen_vertex_arrays(ctx, n, arrays, false, "glGenVertexArrays");
 747 }
 748
 749
 750 void GLAPIENTRY
 751 _mesa_GenVertexArrays(GLsizei n, GLuint *arrays)
 752 {
 753    GET_CURRENT_CONTEXT(ctx);
 754    gen_vertex_arrays_err(ctx, n, arrays, false, "glGenVertexArrays");
 755 }
 756
 757
 758 /**
 759  * ARB_direct_state_access
 760  * Generates ID's and creates the array objects.
 761  */
 762 void GLAPIENTRY
 763 _mesa_CreateVertexArrays_no_error(GLsizei n, GLuint *arrays)
 764 {
 765    GET_CURRENT_CONTEXT(ctx);
 766    gen_vertex_arrays(ctx, n, arrays, true, "glCreateVertexArrays");
 767 }
 768
 769
 770 void GLAPIENTRY
 771 _mesa_CreateVertexArrays(GLsizei n, GLuint *arrays)
 772 {
 773    GET_CURRENT_CONTEXT(ctx);
 774    gen_vertex_arrays_err(ctx, n, arrays, true, "glCreateVertexArrays");
 775 }
 776
 777
 778 /**
 779  * Determine if ID is the name of an array object.
 780  *
 781  * \param id  ID of the potential array object.
 782  * \return  \c GL_TRUE if \c id is the name of a array object,
 783  *          \c GL_FALSE otherwise.
 784  */
 785 GLboolean GLAPIENTRY
 786 _mesa_IsVertexArray( GLuint id )
 787 {
 788    struct gl_vertex_array_object * obj;
 789    GET_CURRENT_CONTEXT(ctx);
 790    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 791
 792    obj = _mesa_lookup_vao(ctx, id);
 793
 794    return obj != NULL && obj->EverBound;
 795 }
 796
 797
 798 /**
 799  * Sets the element array buffer binding of a vertex array object.
 800  *
 801  * This is the ARB_direct_state_access equivalent of
 802  * glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer).
 803  */
 804 static ALWAYS_INLINE void
 805 vertex_array_element_buffer(struct gl_context *ctx, GLuint vaobj, GLuint buffer,
 806                             bool no_error)
 807 {
 808    struct gl_vertex_array_object *vao;
 809    struct gl_buffer_object *bufObj;
 810
 811    ASSERT_OUTSIDE_BEGIN_END(ctx);
 812
 813    if (!no_error) {
 814       /* The GL_ARB_direct_state_access specification says:
 815        *
 816        *    "An INVALID_OPERATION error is generated by
 817        *     VertexArrayElementBuffer if <vaobj> is not [compatibility profile:
 818        *     zero or] the name of an existing vertex array object."
 819        */
 820       vao =_mesa_lookup_vao_err(ctx, vaobj, "glVertexArrayElementBuffer");
 821       if (!vao)
 822          return;
 823    } else {
 824       vao = _mesa_lookup_vao(ctx, vaobj);
 825    }
 826
 827    if (buffer != 0) {
 828       if (!no_error) {
 829          /* The GL_ARB_direct_state_access specification says:
 830           *
 831           *    "An INVALID_OPERATION error is generated if <buffer> is not zero
 832           *     or the name of an existing buffer object."
 833           */
 834          bufObj = _mesa_lookup_bufferobj_err(ctx, buffer,
 835                                              "glVertexArrayElementBuffer");
 836       } else {
 837          bufObj = _mesa_lookup_bufferobj(ctx, buffer);
 838       }
 839    } else {
 840       bufObj = ctx->Shared->NullBufferObj;
 841    }
 842
 843    if (bufObj)
 844       _mesa_reference_buffer_object(ctx, &vao->IndexBufferObj, bufObj);
 845 }
 846
 847
 848 void GLAPIENTRY
 849 _mesa_VertexArrayElementBuffer_no_error(GLuint vaobj, GLuint buffer)
 850 {
 851    GET_CURRENT_CONTEXT(ctx);
 852    vertex_array_element_buffer(ctx, vaobj, buffer, true);
 853 }
 854
 855
 856 void GLAPIENTRY
 857 _mesa_VertexArrayElementBuffer(GLuint vaobj, GLuint buffer)
 858 {
 859    GET_CURRENT_CONTEXT(ctx);
 860    vertex_array_element_buffer(ctx, vaobj, buffer, false);
 861 }
 862
 863
 864 void GLAPIENTRY
 865 _mesa_GetVertexArrayiv(GLuint vaobj, GLenum pname, GLint *param)
 866 {
 867    GET_CURRENT_CONTEXT(ctx);
 868    struct gl_vertex_array_object *vao;
 869
 870    ASSERT_OUTSIDE_BEGIN_END(ctx);
 871
 872    /* The GL_ARB_direct_state_access specification says:
 873     *
 874     *   "An INVALID_OPERATION error is generated if <vaobj> is not
 875     *    [compatibility profile: zero or] the name of an existing
 876     *    vertex array object."
 877     */
 878    vao =_mesa_lookup_vao_err(ctx, vaobj, "glGetVertexArrayiv");
 879    if (!vao)
 880       return;
 881
 882    /* The GL_ARB_direct_state_access specification says:
 883     *
 884     *   "An INVALID_ENUM error is generated if <pname> is not
 885     *    ELEMENT_ARRAY_BUFFER_BINDING."
 886     */
 887    if (pname != GL_ELEMENT_ARRAY_BUFFER_BINDING) {
 888       _mesa_error(ctx, GL_INVALID_ENUM,
 889                   "glGetVertexArrayiv(pname != "
 890                   "GL_ELEMENT_ARRAY_BUFFER_BINDING)");
 891       return;
 892    }
 893
 894    param[0] = vao->IndexBufferObj->Name;
 895 }