dll/opengl/mesa/main/varray.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.6
   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 #include <precomp.h>
  27
  28 /** Used to indicate which GL datatypes are accepted by each of the
  29  * glVertex/Color/Attrib/EtcPointer() functions.
  30  */
  31 #define BOOL_BIT             0x1
  32 #define BYTE_BIT             0x2
  33 #define UNSIGNED_BYTE_BIT    0x4
  34 #define SHORT_BIT            0x8
  35 #define UNSIGNED_SHORT_BIT   0x10
  36 #define INT_BIT              0x20
  37 #define UNSIGNED_INT_BIT     0x40
  38 #define HALF_BIT             0x80
  39 #define FLOAT_BIT            0x100
  40 #define DOUBLE_BIT           0x200
  41
  42
  43 /** Convert GL datatype enum into a <type>_BIT value seen above */
  44 static GLbitfield
  45 type_to_bit(const struct gl_context *ctx, GLenum type)
  46 {
  47    switch (type) {
  48    case GL_BOOL:
  49       return BOOL_BIT;
  50    case GL_BYTE:
  51       return BYTE_BIT;
  52    case GL_UNSIGNED_BYTE:
  53       return UNSIGNED_BYTE_BIT;
  54    case GL_SHORT:
  55       return SHORT_BIT;
  56    case GL_UNSIGNED_SHORT:
  57       return UNSIGNED_SHORT_BIT;
  58    case GL_INT:
  59       return INT_BIT;
  60    case GL_UNSIGNED_INT:
  61       return UNSIGNED_INT_BIT;
  62    case GL_FLOAT:
  63       return FLOAT_BIT;
  64    case GL_DOUBLE:
  65       return DOUBLE_BIT;
  66    default:
  67       return 0;
  68    }
  69 }
  70
  71
  72 /**
  73  * Do error checking and update state for glVertex/Color/TexCoord/...Pointer
  74  * functions.
  75  *
  76  * \param func  name of calling function used for error reporting
  77  * \param attrib  the attribute array index to update
  78  * \param legalTypes  bitmask of *_BIT above indicating legal datatypes
  79  * \param sizeMin  min allowable size value
  80  * \param sizeMax  max allowable size value
  81  * \param size  components per element (1, 2, 3 or 4)
  82  * \param type  datatype of each component (GL_FLOAT, GL_INT, etc)
  83  * \param stride  stride between elements, in elements
  84  * \param normalized  are integer types converted to floats in [-1, 1]?
  85  * \param integer  integer-valued values (will not be normalized to [-1,1])
  86  * \param ptr  the address (or offset inside VBO) of the array data
  87  */
  88 static void
  89 update_array(struct gl_context *ctx,
  90              const char *func,
  91              GLuint attrib, GLbitfield legalTypesMask,
  92              GLint sizeMin, GLint sizeMax,
  93              GLint size, GLenum type, GLsizei stride,
  94              GLboolean normalized, GLboolean integer,
  95              const GLvoid *ptr)
  96 {
  97    struct gl_client_array *array;
  98    GLbitfield typeBit;
  99    GLsizei elementSize;
 100
 101    typeBit = type_to_bit(ctx, type);
 102    if (typeBit == 0x0 || (typeBit & legalTypesMask) == 0x0) {
 103       _mesa_error(ctx, GL_INVALID_ENUM, "%s(type = %s)",
 104                   func, _mesa_lookup_enum_by_nr(type));
 105       return;
 106    }
 107
 108    /* Do size parameter checking. */
 109    if (size < sizeMin || size > sizeMax || size > 4) {
 110       _mesa_error(ctx, GL_INVALID_VALUE, "%s(size=%d)", func, size);
 111       return;
 112    }
 113
 114    ASSERT(size <= 4);
 115
 116    if (stride < 0) {
 117       _mesa_error( ctx, GL_INVALID_VALUE, "%s(stride=%d)", func, stride );
 118       return;
 119    }
 120
 121    elementSize = _mesa_sizeof_type(type) * size;
 122
 123    array = &ctx->Array.VertexAttrib[attrib];
 124    array->Size = size;
 125    array->Type = type;
 126    array->Stride = stride;
 127    array->StrideB = stride ? stride : elementSize;
 128    array->Normalized = normalized;
 129    array->Integer = integer;
 130    array->Ptr = (const GLubyte *) ptr;
 131    array->_ElementSize = elementSize;
 132
 133    ctx->NewState |= _NEW_ARRAY;
 134    ctx->Array.NewState |= VERT_BIT(attrib);
 135 }
 136
 137
 138 void GLAPIENTRY
 139 _mesa_VertexPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr)
 140 {
 141    GLbitfield legalTypes = (SHORT_BIT | INT_BIT | FLOAT_BIT |
 142                             DOUBLE_BIT | HALF_BIT);
 143    GET_CURRENT_CONTEXT(ctx);
 144    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 145
 146    update_array(ctx, "glVertexPointer", VERT_ATTRIB_POS,
 147                 legalTypes, 2, 4,
 148                 size, type, stride, GL_FALSE, GL_FALSE, ptr);
 149 }
 150
 151
 152 void GLAPIENTRY
 153 _mesa_NormalPointer(GLenum type, GLsizei stride, const GLvoid *ptr )
 154 {
 155    const GLbitfield legalTypes = (BYTE_BIT | SHORT_BIT | INT_BIT |
 156                                   HALF_BIT | FLOAT_BIT | DOUBLE_BIT);
 157    GET_CURRENT_CONTEXT(ctx);
 158    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 159
 160    update_array(ctx, "glNormalPointer", VERT_ATTRIB_NORMAL,
 161                 legalTypes, 3, 3,
 162                 3, type, stride, GL_TRUE, GL_FALSE, ptr);
 163 }
 164
 165
 166 void GLAPIENTRY
 167 _mesa_ColorPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr)
 168 {
 169    const GLbitfield legalTypes = (BYTE_BIT | UNSIGNED_BYTE_BIT |
 170                                   SHORT_BIT | UNSIGNED_SHORT_BIT |
 171                                   INT_BIT | UNSIGNED_INT_BIT |
 172                                   HALF_BIT | FLOAT_BIT | DOUBLE_BIT);
 173    GET_CURRENT_CONTEXT(ctx);
 174    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 175
 176    update_array(ctx, "glColorPointer", VERT_ATTRIB_COLOR,
 177                 legalTypes, 3, 4,
 178                 size, type, stride, GL_TRUE, GL_FALSE, ptr);
 179 }
 180
 181
 182 void GLAPIENTRY
 183 _mesa_FogCoordPointerEXT(GLenum type, GLsizei stride, const GLvoid *ptr)
 184 {
 185    const GLbitfield legalTypes = (HALF_BIT | FLOAT_BIT | DOUBLE_BIT);
 186    GET_CURRENT_CONTEXT(ctx);
 187    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 188
 189    update_array(ctx, "glFogCoordPointer", VERT_ATTRIB_FOG,
 190                 legalTypes, 1, 1,
 191                 1, type, stride, GL_FALSE, GL_FALSE, ptr);
 192 }
 193
 194
 195 void GLAPIENTRY
 196 _mesa_IndexPointer(GLenum type, GLsizei stride, const GLvoid *ptr)
 197 {
 198    const GLbitfield legalTypes = (UNSIGNED_BYTE_BIT | SHORT_BIT | INT_BIT |
 199                                   FLOAT_BIT | DOUBLE_BIT);
 200    GET_CURRENT_CONTEXT(ctx);
 201    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 202
 203    update_array(ctx, "glIndexPointer", VERT_ATTRIB_COLOR_INDEX,
 204                 legalTypes, 1, 1,
 205                 1, type, stride, GL_FALSE, GL_FALSE, ptr);
 206 }
 207
 208
 209 void GLAPIENTRY
 210 _mesa_TexCoordPointer(GLint size, GLenum type, GLsizei stride,
 211                       const GLvoid *ptr)
 212 {
 213    GLbitfield legalTypes = (SHORT_BIT | INT_BIT |
 214                             HALF_BIT | FLOAT_BIT | DOUBLE_BIT);
 215    GET_CURRENT_CONTEXT(ctx);
 216    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 217
 218    update_array(ctx, "glTexCoordPointer", VERT_ATTRIB_TEX,
 219                 legalTypes, 1, 4,
 220                 size, type, stride, GL_FALSE, GL_FALSE,
 221                 ptr);
 222 }
 223
 224
 225 void GLAPIENTRY
 226 _mesa_EdgeFlagPointer(GLsizei stride, const GLvoid *ptr)
 227 {
 228    const GLbitfield legalTypes = UNSIGNED_BYTE_BIT;
 229    /* see table 2.4 edits in GL_EXT_gpu_shader4 spec: */
 230    const GLboolean integer = GL_TRUE;
 231    GET_CURRENT_CONTEXT(ctx);
 232    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 233
 234    update_array(ctx, "glEdgeFlagPointer", VERT_ATTRIB_EDGEFLAG,
 235                 legalTypes, 1, 1,
 236                 1, GL_UNSIGNED_BYTE, stride, GL_FALSE, integer, ptr);
 237 }
 238
 239 void GLAPIENTRY
 240 _mesa_VertexPointerEXT(GLint size, GLenum type, GLsizei stride,
 241                        GLsizei count, const GLvoid *ptr)
 242 {
 243    (void) count;
 244    _mesa_VertexPointer(size, type, stride, ptr);
 245 }
 246
 247
 248 void GLAPIENTRY
 249 _mesa_NormalPointerEXT(GLenum type, GLsizei stride, GLsizei count,
 250                        const GLvoid *ptr)
 251 {
 252    (void) count;
 253    _mesa_NormalPointer(type, stride, ptr);
 254 }
 255
 256
 257 void GLAPIENTRY
 258 _mesa_ColorPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count,
 259                       const GLvoid *ptr)
 260 {
 261    (void) count;
 262    _mesa_ColorPointer(size, type, stride, ptr);
 263 }
 264
 265
 266 void GLAPIENTRY
 267 _mesa_IndexPointerEXT(GLenum type, GLsizei stride, GLsizei count,
 268                       const GLvoid *ptr)
 269 {
 270    (void) count;
 271    _mesa_IndexPointer(type, stride, ptr);
 272 }
 273
 274
 275 void GLAPIENTRY
 276 _mesa_TexCoordPointerEXT(GLint size, GLenum type, GLsizei stride,
 277                          GLsizei count, const GLvoid *ptr)
 278 {
 279    (void) count;
 280    _mesa_TexCoordPointer(size, type, stride, ptr);
 281 }
 282
 283
 284 void GLAPIENTRY
 285 _mesa_EdgeFlagPointerEXT(GLsizei stride, GLsizei count, const GLboolean *ptr)
 286 {
 287    (void) count;
 288    _mesa_EdgeFlagPointer(stride, ptr);
 289 }
 290
 291
 292 void GLAPIENTRY
 293 _mesa_InterleavedArrays(GLenum format, GLsizei stride, const GLvoid *pointer)
 294 {
 295    GET_CURRENT_CONTEXT(ctx);
 296    GLboolean tflag, cflag, nflag;  /* enable/disable flags */
 297    GLint tcomps, ccomps, vcomps;   /* components per texcoord, color, vertex */
 298    GLenum ctype = 0;               /* color type */
 299    GLint coffset = 0, noffset = 0, voffset;/* color, normal, vertex offsets */
 300    const GLint toffset = 0;        /* always zero */
 301    GLint defstride;                /* default stride */
 302    GLint c, f;
 303
 304    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 305
 306    f = sizeof(GLfloat);
 307    c = f * ((4 * sizeof(GLubyte) + (f - 1)) / f);
 308
 309    if (stride < 0) {
 310       _mesa_error( ctx, GL_INVALID_VALUE, "glInterleavedArrays(stride)" );
 311       return;
 312    }
 313
 314    switch (format) {
 315       case GL_V2F:
 316          tflag = GL_FALSE;  cflag = GL_FALSE;  nflag = GL_FALSE;
 317          tcomps = 0;  ccomps = 0;  vcomps = 2;
 318          voffset = 0;
 319          defstride = 2*f;
 320          break;
 321       case GL_V3F:
 322          tflag = GL_FALSE;  cflag = GL_FALSE;  nflag = GL_FALSE;
 323          tcomps = 0;  ccomps = 0;  vcomps = 3;
 324          voffset = 0;
 325          defstride = 3*f;
 326          break;
 327       case GL_C4UB_V2F:
 328          tflag = GL_FALSE;  cflag = GL_TRUE;  nflag = GL_FALSE;
 329          tcomps = 0;  ccomps = 4;  vcomps = 2;
 330          ctype = GL_UNSIGNED_BYTE;
 331          coffset = 0;
 332          voffset = c;
 333          defstride = c + 2*f;
 334          break;
 335       case GL_C4UB_V3F:
 336          tflag = GL_FALSE;  cflag = GL_TRUE;  nflag = GL_FALSE;
 337          tcomps = 0;  ccomps = 4;  vcomps = 3;
 338          ctype = GL_UNSIGNED_BYTE;
 339          coffset = 0;
 340          voffset = c;
 341          defstride = c + 3*f;
 342          break;
 343       case GL_C3F_V3F:
 344          tflag = GL_FALSE;  cflag = GL_TRUE;  nflag = GL_FALSE;
 345          tcomps = 0;  ccomps = 3;  vcomps = 3;
 346          ctype = GL_FLOAT;
 347          coffset = 0;
 348          voffset = 3*f;
 349          defstride = 6*f;
 350          break;
 351       case GL_N3F_V3F:
 352          tflag = GL_FALSE;  cflag = GL_FALSE;  nflag = GL_TRUE;
 353          tcomps = 0;  ccomps = 0;  vcomps = 3;
 354          noffset = 0;
 355          voffset = 3*f;
 356          defstride = 6*f;
 357          break;
 358       case GL_C4F_N3F_V3F:
 359          tflag = GL_FALSE;  cflag = GL_TRUE;  nflag = GL_TRUE;
 360          tcomps = 0;  ccomps = 4;  vcomps = 3;
 361          ctype = GL_FLOAT;
 362          coffset = 0;
 363          noffset = 4*f;
 364          voffset = 7*f;
 365          defstride = 10*f;
 366          break;
 367       case GL_T2F_V3F:
 368          tflag = GL_TRUE;  cflag = GL_FALSE;  nflag = GL_FALSE;
 369          tcomps = 2;  ccomps = 0;  vcomps = 3;
 370          voffset = 2*f;
 371          defstride = 5*f;
 372          break;
 373       case GL_T4F_V4F:
 374          tflag = GL_TRUE;  cflag = GL_FALSE;  nflag = GL_FALSE;
 375          tcomps = 4;  ccomps = 0;  vcomps = 4;
 376          voffset = 4*f;
 377          defstride = 8*f;
 378          break;
 379       case GL_T2F_C4UB_V3F:
 380          tflag = GL_TRUE;  cflag = GL_TRUE;  nflag = GL_FALSE;
 381          tcomps = 2;  ccomps = 4;  vcomps = 3;
 382          ctype = GL_UNSIGNED_BYTE;
 383          coffset = 2*f;
 384          voffset = c+2*f;
 385          defstride = c+5*f;
 386          break;
 387       case GL_T2F_C3F_V3F:
 388          tflag = GL_TRUE;  cflag = GL_TRUE;  nflag = GL_FALSE;
 389          tcomps = 2;  ccomps = 3;  vcomps = 3;
 390          ctype = GL_FLOAT;
 391          coffset = 2*f;
 392          voffset = 5*f;
 393          defstride = 8*f;
 394          break;
 395       case GL_T2F_N3F_V3F:
 396          tflag = GL_TRUE;  cflag = GL_FALSE;  nflag = GL_TRUE;
 397          tcomps = 2;  ccomps = 0;  vcomps = 3;
 398          noffset = 2*f;
 399          voffset = 5*f;
 400          defstride = 8*f;
 401          break;
 402       case GL_T2F_C4F_N3F_V3F:
 403          tflag = GL_TRUE;  cflag = GL_TRUE;  nflag = GL_TRUE;
 404          tcomps = 2;  ccomps = 4;  vcomps = 3;
 405          ctype = GL_FLOAT;
 406          coffset = 2*f;
 407          noffset = 6*f;
 408          voffset = 9*f;
 409          defstride = 12*f;
 410          break;
 411       case GL_T4F_C4F_N3F_V4F:
 412          tflag = GL_TRUE;  cflag = GL_TRUE;  nflag = GL_TRUE;
 413          tcomps = 4;  ccomps = 4;  vcomps = 4;
 414          ctype = GL_FLOAT;
 415          coffset = 4*f;
 416          noffset = 8*f;
 417          voffset = 11*f;
 418          defstride = 15*f;
 419          break;
 420       default:
 421          _mesa_error( ctx, GL_INVALID_ENUM, "glInterleavedArrays(format)" );
 422          return;
 423    }
 424
 425    if (stride==0) {
 426       stride = defstride;
 427    }
 428
 429    _mesa_DisableClientState( GL_EDGE_FLAG_ARRAY );
 430    _mesa_DisableClientState( GL_INDEX_ARRAY );
 431    /* XXX also disable secondary color and generic arrays? */
 432
 433    /* Texcoords */
 434    if (tflag) {
 435       _mesa_EnableClientState( GL_TEXTURE_COORD_ARRAY );
 436       _mesa_TexCoordPointer( tcomps, GL_FLOAT, stride,
 437                              (GLubyte *) pointer + toffset );
 438    }
 439    else {
 440       _mesa_DisableClientState( GL_TEXTURE_COORD_ARRAY );
 441    }
 442
 443    /* Color */
 444    if (cflag) {
 445       _mesa_EnableClientState( GL_COLOR_ARRAY );
 446       _mesa_ColorPointer( ccomps, ctype, stride,
 447                           (GLubyte *) pointer + coffset );
 448    }
 449    else {
 450       _mesa_DisableClientState( GL_COLOR_ARRAY );
 451    }
 452
 453
 454    /* Normals */
 455    if (nflag) {
 456       _mesa_EnableClientState( GL_NORMAL_ARRAY );
 457       _mesa_NormalPointer( GL_FLOAT, stride, (GLubyte *) pointer + noffset );
 458    }
 459    else {
 460       _mesa_DisableClientState( GL_NORMAL_ARRAY );
 461    }
 462
 463    /* Vertices */
 464    _mesa_EnableClientState( GL_VERTEX_ARRAY );
 465    _mesa_VertexPointer( vcomps, GL_FLOAT, stride,
 466                         (GLubyte *) pointer + voffset );
 467 }
 468
 469
 470 void GLAPIENTRY
 471 _mesa_LockArraysEXT(GLint first, GLsizei count)
 472 {
 473    GET_CURRENT_CONTEXT(ctx);
 474    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 475
 476    if (MESA_VERBOSE & VERBOSE_API)
 477       _mesa_debug(ctx, "glLockArrays %d %d\n", first, count);
 478
 479    if (first < 0) {
 480       _mesa_error( ctx, GL_INVALID_VALUE, "glLockArraysEXT(first)" );
 481       return;
 482    }
 483    if (count <= 0) {
 484       _mesa_error( ctx, GL_INVALID_VALUE, "glLockArraysEXT(count)" );
 485       return;
 486    }
 487    if (ctx->Array.LockCount != 0) {
 488       _mesa_error( ctx, GL_INVALID_OPERATION, "glLockArraysEXT(reentry)" );
 489       return;
 490    }
 491
 492    ctx->Array.LockFirst = first;
 493    ctx->Array.LockCount = count;
 494
 495    ctx->NewState |= _NEW_ARRAY;
 496    ctx->Array.NewState |= VERT_BIT_ALL;
 497 }
 498
 499
 500 void GLAPIENTRY
 501 _mesa_UnlockArraysEXT( void )
 502 {
 503    GET_CURRENT_CONTEXT(ctx);
 504    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 505
 506    if (MESA_VERBOSE & VERBOSE_API)
 507       _mesa_debug(ctx, "glUnlockArrays\n");
 508
 509    if (ctx->Array.LockCount == 0) {
 510       _mesa_error( ctx, GL_INVALID_OPERATION, "glUnlockArraysEXT(reexit)" );
 511       return;
 512    }
 513
 514    ctx->Array.LockFirst = 0;
 515    ctx->Array.LockCount = 0;
 516    ctx->NewState |= _NEW_ARRAY;
 517    ctx->Array.NewState |= VERT_BIT_ALL;
 518 }
 519
 520 /* GL_IBM_multimode_draw_arrays */
 521 void GLAPIENTRY
 522 _mesa_MultiModeDrawArraysIBM( const GLenum * mode, const GLint * first,
 523                               const GLsizei * count,
 524                               GLsizei primcount, GLint modestride )
 525 {
 526    GET_CURRENT_CONTEXT(ctx);
 527    GLint i;
 528
 529    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 530
 531    for ( i = 0 ; i < primcount ; i++ ) {
 532       if ( count[i] > 0 ) {
 533          GLenum m = *((GLenum *) ((GLubyte *) mode + i * modestride));
 534          CALL_DrawArrays(ctx->Exec, ( m, first[i], count[i] ));
 535       }
 536    }
 537 }
 538
 539
 540 /* GL_IBM_multimode_draw_arrays */
 541 void GLAPIENTRY
 542 _mesa_MultiModeDrawElementsIBM( const GLenum * mode, const GLsizei * count,
 543                                 GLenum type, const GLvoid * const * indices,
 544                                 GLsizei primcount, GLint modestride )
 545 {
 546    GET_CURRENT_CONTEXT(ctx);
 547    GLint i;
 548
 549    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 550
 551    /* XXX not sure about ARB_vertex_buffer_object handling here */
 552
 553    for ( i = 0 ; i < primcount ; i++ ) {
 554       if ( count[i] > 0 ) {
 555          GLenum m = *((GLenum *) ((GLubyte *) mode + i * modestride));
 556          CALL_DrawElements(ctx->Exec, ( m, count[i], type, indices[i] ));
 557       }
 558    }
 559 }
 560
 561
 562 /**
 563  * Copy one client vertex array to another.
 564  */
 565 void
 566 _mesa_copy_client_array(struct gl_context *ctx,
 567                         struct gl_client_array *dst,
 568                         struct gl_client_array *src)
 569 {
 570    dst->Size = src->Size;
 571    dst->Type = src->Type;
 572    dst->Stride = src->Stride;
 573    dst->StrideB = src->StrideB;
 574    dst->Ptr = src->Ptr;
 575    dst->Enabled = src->Enabled;
 576    dst->Normalized = src->Normalized;
 577    dst->Integer = src->Integer;
 578    dst->_ElementSize = src->_ElementSize;
 579    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
 580    dst->_MaxElement = src->_MaxElement;
 581 }
 582
 583 static void
 584 init_array(struct gl_context *ctx,
 585            struct gl_client_array *array, GLint size, GLint type)
 586 {
 587    array->Size = size;
 588    array->Type = type;
 589    array->Stride = 0;
 590    array->StrideB = 0;
 591    array->Ptr = NULL;
 592    array->Enabled = GL_FALSE;
 593    array->Normalized = GL_FALSE;
 594    array->Integer = GL_FALSE;
 595    array->_ElementSize = size * _mesa_sizeof_type(type);
 596    /* Vertex array buffers */
 597    _mesa_reference_buffer_object(ctx, &array->BufferObj,
 598                                  ctx->Shared->NullBufferObj);
 599 }
 600
 601
 602 /**
 603  * Initialize vertex array state for given context.
 604  */
 605 void
 606 _mesa_init_varray(struct gl_context *ctx, struct gl_array_attrib *array)
 607 {
 608     GLuint i;
 609
 610     /* Init the individual arrays */
 611     for (i = 0; i < Elements(array->VertexAttrib); i++) {
 612        switch (i) {
 613        case VERT_ATTRIB_WEIGHT:
 614           init_array(ctx, &array->VertexAttrib[VERT_ATTRIB_WEIGHT], 1, GL_FLOAT);
 615           break;
 616        case VERT_ATTRIB_NORMAL:
 617           init_array(ctx, &array->VertexAttrib[VERT_ATTRIB_NORMAL], 3, GL_FLOAT);
 618           break;
 619        case VERT_ATTRIB_FOG:
 620           init_array(ctx, &array->VertexAttrib[VERT_ATTRIB_FOG], 1, GL_FLOAT);
 621           break;
 622        case VERT_ATTRIB_COLOR_INDEX:
 623           init_array(ctx, &array->VertexAttrib[VERT_ATTRIB_COLOR_INDEX], 1, GL_FLOAT);
 624           break;
 625        case VERT_ATTRIB_EDGEFLAG:
 626           init_array(ctx, &array->VertexAttrib[VERT_ATTRIB_EDGEFLAG], 1, GL_BOOL);
 627           break;
 628        default:
 629           init_array(ctx, &array->VertexAttrib[i], 4, GL_FLOAT);
 630           break;
 631        }
 632     }
 633 }
 634
 635
 636 /**
 637  * Free vertex array state for given context.
 638  */
 639 void
 640 _mesa_free_varray_data(struct gl_context *ctx, struct gl_array_attrib* array)
 641 {
 642     GLuint i;
 643
 644     /* Uninit the individual arrays */
 645     for (i = 0; i < Elements(array->VertexAttrib); i++)
 646     {
 647         _mesa_reference_buffer_object(ctx, &array->VertexAttrib[i].BufferObj, NULL);
 648         memset(&array->VertexAttrib[i], 0, sizeof(struct gl_client_array));
 649     }
 650 }