src/mesa/state_tracker/st_atom_array.c

   1
   2 /**************************************************************************
   3  *
   4  * Copyright 2007 VMware, Inc.
   5  * Copyright 2012 Marek Olšák <maraeo@gmail.com>
   6  * 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
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  *
  28  **************************************************************************/
  29
  30 /*
  31  * This converts the VBO's vertex attribute/array information into
  32  * Gallium vertex state and binds it.
  33  *
  34  * Authors:
  35  *   Keith Whitwell <keithw@vmware.com>
  36  *   Marek Olšák <maraeo@gmail.com>
  37  */
  38
  39 #include "st_context.h"
  40 #include "st_atom.h"
  41 #include "st_cb_bufferobjects.h"
  42 #include "st_draw.h"
  43 #include "st_program.h"
  44
  45 #include "cso_cache/cso_context.h"
  46 #include "util/u_math.h"
  47
  48 #include "main/bufferobj.h"
  49 #include "main/glformats.h"
  50
  51
  52 static GLuint double_types[4] = {
  53    PIPE_FORMAT_R64_FLOAT,
  54    PIPE_FORMAT_R64G64_FLOAT,
  55    PIPE_FORMAT_R64G64B64_FLOAT,
  56    PIPE_FORMAT_R64G64B64A64_FLOAT
  57 };
  58
  59 static GLuint float_types[4] = {
  60    PIPE_FORMAT_R32_FLOAT,
  61    PIPE_FORMAT_R32G32_FLOAT,
  62    PIPE_FORMAT_R32G32B32_FLOAT,
  63    PIPE_FORMAT_R32G32B32A32_FLOAT
  64 };
  65
  66 static GLuint half_float_types[4] = {
  67    PIPE_FORMAT_R16_FLOAT,
  68    PIPE_FORMAT_R16G16_FLOAT,
  69    PIPE_FORMAT_R16G16B16_FLOAT,
  70    PIPE_FORMAT_R16G16B16A16_FLOAT
  71 };
  72
  73 static GLuint uint_types_norm[4] = {
  74    PIPE_FORMAT_R32_UNORM,
  75    PIPE_FORMAT_R32G32_UNORM,
  76    PIPE_FORMAT_R32G32B32_UNORM,
  77    PIPE_FORMAT_R32G32B32A32_UNORM
  78 };
  79
  80 static GLuint uint_types_scale[4] = {
  81    PIPE_FORMAT_R32_USCALED,
  82    PIPE_FORMAT_R32G32_USCALED,
  83    PIPE_FORMAT_R32G32B32_USCALED,
  84    PIPE_FORMAT_R32G32B32A32_USCALED
  85 };
  86
  87 static GLuint uint_types_int[4] = {
  88    PIPE_FORMAT_R32_UINT,
  89    PIPE_FORMAT_R32G32_UINT,
  90    PIPE_FORMAT_R32G32B32_UINT,
  91    PIPE_FORMAT_R32G32B32A32_UINT
  92 };
  93
  94 static GLuint int_types_norm[4] = {
  95    PIPE_FORMAT_R32_SNORM,
  96    PIPE_FORMAT_R32G32_SNORM,
  97    PIPE_FORMAT_R32G32B32_SNORM,
  98    PIPE_FORMAT_R32G32B32A32_SNORM
  99 };
 100
 101 static GLuint int_types_scale[4] = {
 102    PIPE_FORMAT_R32_SSCALED,
 103    PIPE_FORMAT_R32G32_SSCALED,
 104    PIPE_FORMAT_R32G32B32_SSCALED,
 105    PIPE_FORMAT_R32G32B32A32_SSCALED
 106 };
 107
 108 static GLuint int_types_int[4] = {
 109    PIPE_FORMAT_R32_SINT,
 110    PIPE_FORMAT_R32G32_SINT,
 111    PIPE_FORMAT_R32G32B32_SINT,
 112    PIPE_FORMAT_R32G32B32A32_SINT
 113 };
 114
 115 static GLuint ushort_types_norm[4] = {
 116    PIPE_FORMAT_R16_UNORM,
 117    PIPE_FORMAT_R16G16_UNORM,
 118    PIPE_FORMAT_R16G16B16_UNORM,
 119    PIPE_FORMAT_R16G16B16A16_UNORM
 120 };
 121
 122 static GLuint ushort_types_scale[4] = {
 123    PIPE_FORMAT_R16_USCALED,
 124    PIPE_FORMAT_R16G16_USCALED,
 125    PIPE_FORMAT_R16G16B16_USCALED,
 126    PIPE_FORMAT_R16G16B16A16_USCALED
 127 };
 128
 129 static GLuint ushort_types_int[4] = {
 130    PIPE_FORMAT_R16_UINT,
 131    PIPE_FORMAT_R16G16_UINT,
 132    PIPE_FORMAT_R16G16B16_UINT,
 133    PIPE_FORMAT_R16G16B16A16_UINT
 134 };
 135
 136 static GLuint short_types_norm[4] = {
 137    PIPE_FORMAT_R16_SNORM,
 138    PIPE_FORMAT_R16G16_SNORM,
 139    PIPE_FORMAT_R16G16B16_SNORM,
 140    PIPE_FORMAT_R16G16B16A16_SNORM
 141 };
 142
 143 static GLuint short_types_scale[4] = {
 144    PIPE_FORMAT_R16_SSCALED,
 145    PIPE_FORMAT_R16G16_SSCALED,
 146    PIPE_FORMAT_R16G16B16_SSCALED,
 147    PIPE_FORMAT_R16G16B16A16_SSCALED
 148 };
 149
 150 static GLuint short_types_int[4] = {
 151    PIPE_FORMAT_R16_SINT,
 152    PIPE_FORMAT_R16G16_SINT,
 153    PIPE_FORMAT_R16G16B16_SINT,
 154    PIPE_FORMAT_R16G16B16A16_SINT
 155 };
 156
 157 static GLuint ubyte_types_norm[4] = {
 158    PIPE_FORMAT_R8_UNORM,
 159    PIPE_FORMAT_R8G8_UNORM,
 160    PIPE_FORMAT_R8G8B8_UNORM,
 161    PIPE_FORMAT_R8G8B8A8_UNORM
 162 };
 163
 164 static GLuint ubyte_types_scale[4] = {
 165    PIPE_FORMAT_R8_USCALED,
 166    PIPE_FORMAT_R8G8_USCALED,
 167    PIPE_FORMAT_R8G8B8_USCALED,
 168    PIPE_FORMAT_R8G8B8A8_USCALED
 169 };
 170
 171 static GLuint ubyte_types_int[4] = {
 172    PIPE_FORMAT_R8_UINT,
 173    PIPE_FORMAT_R8G8_UINT,
 174    PIPE_FORMAT_R8G8B8_UINT,
 175    PIPE_FORMAT_R8G8B8A8_UINT
 176 };
 177
 178 static GLuint byte_types_norm[4] = {
 179    PIPE_FORMAT_R8_SNORM,
 180    PIPE_FORMAT_R8G8_SNORM,
 181    PIPE_FORMAT_R8G8B8_SNORM,
 182    PIPE_FORMAT_R8G8B8A8_SNORM
 183 };
 184
 185 static GLuint byte_types_scale[4] = {
 186    PIPE_FORMAT_R8_SSCALED,
 187    PIPE_FORMAT_R8G8_SSCALED,
 188    PIPE_FORMAT_R8G8B8_SSCALED,
 189    PIPE_FORMAT_R8G8B8A8_SSCALED
 190 };
 191
 192 static GLuint byte_types_int[4] = {
 193    PIPE_FORMAT_R8_SINT,
 194    PIPE_FORMAT_R8G8_SINT,
 195    PIPE_FORMAT_R8G8B8_SINT,
 196    PIPE_FORMAT_R8G8B8A8_SINT
 197 };
 198
 199 static GLuint fixed_types[4] = {
 200    PIPE_FORMAT_R32_FIXED,
 201    PIPE_FORMAT_R32G32_FIXED,
 202    PIPE_FORMAT_R32G32B32_FIXED,
 203    PIPE_FORMAT_R32G32B32A32_FIXED
 204 };
 205
 206
 207 /**
 208  * Return a PIPE_FORMAT_x for the given GL datatype and size.
 209  */
 210 enum pipe_format
 211 st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
 212                       GLboolean normalized, GLboolean integer)
 213 {
 214    assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
 215           type == GL_FIXED || type == GL_HALF_FLOAT ||
 216           type == GL_INT_2_10_10_10_REV ||
 217           type == GL_UNSIGNED_INT_2_10_10_10_REV ||
 218           type == GL_UNSIGNED_INT_10F_11F_11F_REV);
 219    assert(size >= 1);
 220    assert(size <= 4);
 221    assert(format == GL_RGBA || format == GL_BGRA);
 222
 223    if (type == GL_INT_2_10_10_10_REV ||
 224        type == GL_UNSIGNED_INT_2_10_10_10_REV) {
 225       assert(size == 4);
 226       assert(!integer);
 227
 228       if (format == GL_BGRA) {
 229          if (type == GL_INT_2_10_10_10_REV) {
 230             if (normalized)
 231                return PIPE_FORMAT_B10G10R10A2_SNORM;
 232             else
 233                return PIPE_FORMAT_B10G10R10A2_SSCALED;
 234          } else {
 235             if (normalized)
 236                return PIPE_FORMAT_B10G10R10A2_UNORM;
 237             else
 238                return PIPE_FORMAT_B10G10R10A2_USCALED;
 239          }
 240       } else {
 241          if (type == GL_INT_2_10_10_10_REV) {
 242             if (normalized)
 243                return PIPE_FORMAT_R10G10B10A2_SNORM;
 244             else
 245                return PIPE_FORMAT_R10G10B10A2_SSCALED;
 246          } else {
 247             if (normalized)
 248                return PIPE_FORMAT_R10G10B10A2_UNORM;
 249             else
 250                return PIPE_FORMAT_R10G10B10A2_USCALED;
 251          }
 252       }
 253    }
 254
 255    if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
 256       assert(size == 3);
 257       assert(!integer);
 258       assert(format == GL_RGBA);
 259
 260       return PIPE_FORMAT_R11G11B10_FLOAT;
 261    }
 262
 263    if (format == GL_BGRA) {
 264       /* this is an odd-ball case */
 265       assert(type == GL_UNSIGNED_BYTE);
 266       assert(normalized);
 267       return PIPE_FORMAT_B8G8R8A8_UNORM;
 268    }
 269
 270    if (integer) {
 271       switch (type) {
 272       case GL_INT: return int_types_int[size-1];
 273       case GL_SHORT: return short_types_int[size-1];
 274       case GL_BYTE: return byte_types_int[size-1];
 275       case GL_UNSIGNED_INT: return uint_types_int[size-1];
 276       case GL_UNSIGNED_SHORT: return ushort_types_int[size-1];
 277       case GL_UNSIGNED_BYTE: return ubyte_types_int[size-1];
 278       default: assert(0); return 0;
 279       }
 280    }
 281    else if (normalized) {
 282       switch (type) {
 283       case GL_DOUBLE: return double_types[size-1];
 284       case GL_FLOAT: return float_types[size-1];
 285       case GL_HALF_FLOAT: return half_float_types[size-1];
 286       case GL_INT: return int_types_norm[size-1];
 287       case GL_SHORT: return short_types_norm[size-1];
 288       case GL_BYTE: return byte_types_norm[size-1];
 289       case GL_UNSIGNED_INT: return uint_types_norm[size-1];
 290       case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
 291       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
 292       case GL_FIXED: return fixed_types[size-1];
 293       default: assert(0); return 0;
 294       }
 295    }
 296    else {
 297       switch (type) {
 298       case GL_DOUBLE: return double_types[size-1];
 299       case GL_FLOAT: return float_types[size-1];
 300       case GL_HALF_FLOAT: return half_float_types[size-1];
 301       case GL_INT: return int_types_scale[size-1];
 302       case GL_SHORT: return short_types_scale[size-1];
 303       case GL_BYTE: return byte_types_scale[size-1];
 304       case GL_UNSIGNED_INT: return uint_types_scale[size-1];
 305       case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
 306       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
 307       case GL_FIXED: return fixed_types[size-1];
 308       default: assert(0); return 0;
 309       }
 310    }
 311    return PIPE_FORMAT_NONE; /* silence compiler warning */
 312 }
 313
 314 /**
 315  * Examine the active arrays to determine if we have interleaved
 316  * vertex arrays all living in one VBO, or all living in user space.
 317  */
 318 static GLboolean
 319 is_interleaved_arrays(const struct st_vertex_program *vp,
 320                       const struct st_vp_variant *vpv,
 321                       const struct gl_client_array **arrays)
 322 {
 323    GLuint attr;
 324    const struct gl_buffer_object *firstBufObj = NULL;
 325    GLint firstStride = -1;
 326    const GLubyte *firstPtr = NULL;
 327    GLboolean userSpaceBuffer = GL_FALSE;
 328
 329    for (attr = 0; attr < vpv->num_inputs; attr++) {
 330       const GLuint mesaAttr = vp->index_to_input[attr];
 331       const struct gl_client_array *array = arrays[mesaAttr];
 332       const struct gl_buffer_object *bufObj = array->BufferObj;
 333       const GLsizei stride = array->StrideB; /* in bytes */
 334
 335       if (attr == 0) {
 336          /* save info about the first array */
 337          firstStride = stride;
 338          firstPtr = array->Ptr;
 339          firstBufObj = bufObj;
 340          userSpaceBuffer = !bufObj || !bufObj->Name;
 341       }
 342       else {
 343          /* check if other arrays interleave with the first, in same buffer */
 344          if (stride != firstStride)
 345             return GL_FALSE; /* strides don't match */
 346
 347          if (bufObj != firstBufObj)
 348             return GL_FALSE; /* arrays in different VBOs */
 349
 350          if (abs(array->Ptr - firstPtr) > firstStride)
 351             return GL_FALSE; /* arrays start too far apart */
 352
 353          if ((!_mesa_is_bufferobj(bufObj)) != userSpaceBuffer)
 354             return GL_FALSE; /* mix of VBO and user-space arrays */
 355       }
 356    }
 357
 358    return GL_TRUE;
 359 }
 360
 361 /**
 362  * Set up for drawing interleaved arrays that all live in one VBO
 363  * or all live in user space.
 364  * \param vbuffer  returns vertex buffer info
 365  * \param velements  returns vertex element info
 366  */
 367 static boolean
 368 setup_interleaved_attribs(const struct st_vertex_program *vp,
 369                           const struct st_vp_variant *vpv,
 370                           const struct gl_client_array **arrays,
 371                           struct pipe_vertex_buffer *vbuffer,
 372                           struct pipe_vertex_element velements[])
 373 {
 374    GLuint attr;
 375    const GLubyte *low_addr = NULL;
 376    GLboolean usingVBO;      /* all arrays in a VBO? */
 377    struct gl_buffer_object *bufobj;
 378    GLsizei stride;
 379
 380    /* Find the lowest address of the arrays we're drawing,
 381     * Init bufobj and stride.
 382     */
 383    if (vpv->num_inputs) {
 384       const GLuint mesaAttr0 = vp->index_to_input[0];
 385       const struct gl_client_array *array = arrays[mesaAttr0];
 386
 387       /* Since we're doing interleaved arrays, we know there'll be at most
 388        * one buffer object and the stride will be the same for all arrays.
 389        * Grab them now.
 390        */
 391       bufobj = array->BufferObj;
 392       stride = array->StrideB;
 393
 394       low_addr = arrays[vp->index_to_input[0]]->Ptr;
 395
 396       for (attr = 1; attr < vpv->num_inputs; attr++) {
 397          const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
 398          low_addr = MIN2(low_addr, start);
 399       }
 400    }
 401    else {
 402       /* not sure we'll ever have zero inputs, but play it safe */
 403       bufobj = NULL;
 404       stride = 0;
 405       low_addr = 0;
 406    }
 407
 408    /* are the arrays in user space? */
 409    usingVBO = _mesa_is_bufferobj(bufobj);
 410
 411    for (attr = 0; attr < vpv->num_inputs; attr++) {
 412       const GLuint mesaAttr = vp->index_to_input[attr];
 413       const struct gl_client_array *array = arrays[mesaAttr];
 414       unsigned src_offset = (unsigned) (array->Ptr - low_addr);
 415
 416       assert(array->_ElementSize ==
 417              _mesa_bytes_per_vertex_attrib(array->Size, array->Type));
 418
 419       velements[attr].src_offset = src_offset;
 420       velements[attr].instance_divisor = array->InstanceDivisor;
 421       velements[attr].vertex_buffer_index = 0;
 422       velements[attr].src_format = st_pipe_vertex_format(array->Type,
 423                                                          array->Size,
 424                                                          array->Format,
 425                                                          array->Normalized,
 426                                                          array->Integer);
 427       assert(velements[attr].src_format);
 428    }
 429
 430    /*
 431     * Return the vbuffer info and setup user-space attrib info, if needed.
 432     */
 433    if (vpv->num_inputs == 0) {
 434       /* just defensive coding here */
 435       vbuffer->buffer = NULL;
 436       vbuffer->user_buffer = NULL;
 437       vbuffer->buffer_offset = 0;
 438       vbuffer->stride = 0;
 439    }
 440    else if (usingVBO) {
 441       /* all interleaved arrays in a VBO */
 442       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 443
 444       if (!stobj || !stobj->buffer) {
 445          return FALSE; /* out-of-memory error probably */
 446       }
 447
 448       vbuffer->buffer = stobj->buffer;
 449       vbuffer->user_buffer = NULL;
 450       vbuffer->buffer_offset = pointer_to_offset(low_addr);
 451       vbuffer->stride = stride;
 452    }
 453    else {
 454       /* all interleaved arrays in user memory */
 455       vbuffer->buffer = NULL;
 456       vbuffer->user_buffer = low_addr;
 457       vbuffer->buffer_offset = 0;
 458       vbuffer->stride = stride;
 459    }
 460    return TRUE;
 461 }
 462
 463 /**
 464  * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
 465  * vertex attribute.
 466  * \param vbuffer  returns vertex buffer info
 467  * \param velements  returns vertex element info
 468  */
 469 static boolean
 470 setup_non_interleaved_attribs(struct st_context *st,
 471                               const struct st_vertex_program *vp,
 472                               const struct st_vp_variant *vpv,
 473                               const struct gl_client_array **arrays,
 474                               struct pipe_vertex_buffer vbuffer[],
 475                               struct pipe_vertex_element velements[])
 476 {
 477    struct gl_context *ctx = st->ctx;
 478    GLuint attr;
 479
 480    for (attr = 0; attr < vpv->num_inputs; attr++) {
 481       const GLuint mesaAttr = vp->index_to_input[attr];
 482       const struct gl_client_array *array = arrays[mesaAttr];
 483       struct gl_buffer_object *bufobj = array->BufferObj;
 484       GLsizei stride = array->StrideB;
 485
 486       assert(array->_ElementSize ==
 487              _mesa_bytes_per_vertex_attrib(array->Size, array->Type));
 488
 489       if (_mesa_is_bufferobj(bufobj)) {
 490          /* Attribute data is in a VBO.
 491           * Recall that for VBOs, the gl_client_array->Ptr field is
 492           * really an offset from the start of the VBO, not a pointer.
 493           */
 494          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 495
 496          if (!stobj || !stobj->buffer) {
 497             return FALSE; /* out-of-memory error probably */
 498          }
 499
 500          vbuffer[attr].buffer = stobj->buffer;
 501          vbuffer[attr].user_buffer = NULL;
 502          vbuffer[attr].buffer_offset = pointer_to_offset(array->Ptr);
 503       }
 504       else {
 505          /* wrap user data */
 506          void *ptr;
 507
 508          if (array->Ptr) {
 509             ptr = (void *) array->Ptr;
 510          }
 511          else {
 512             /* no array, use ctx->Current.Attrib[] value */
 513             ptr = (void *) ctx->Current.Attrib[mesaAttr];
 514             stride = 0;
 515          }
 516
 517          assert(ptr);
 518
 519          vbuffer[attr].buffer = NULL;
 520          vbuffer[attr].user_buffer = ptr;
 521          vbuffer[attr].buffer_offset = 0;
 522       }
 523
 524       /* common-case setup */
 525       vbuffer[attr].stride = stride; /* in bytes */
 526
 527       velements[attr].src_offset = 0;
 528       velements[attr].instance_divisor = array->InstanceDivisor;
 529       velements[attr].vertex_buffer_index = attr;
 530       velements[attr].src_format = st_pipe_vertex_format(array->Type,
 531                                                          array->Size,
 532                                                          array->Format,
 533                                                          array->Normalized,
 534                                                          array->Integer);
 535       assert(velements[attr].src_format);
 536    }
 537    return TRUE;
 538 }
 539
 540 static void update_array(struct st_context *st)
 541 {
 542    struct gl_context *ctx = st->ctx;
 543    const struct gl_client_array **arrays = ctx->Array._DrawArrays;
 544    const struct st_vertex_program *vp;
 545    const struct st_vp_variant *vpv;
 546    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 547    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 548    unsigned num_vbuffers, num_velements;
 549
 550    st->vertex_array_out_of_memory = FALSE;
 551
 552    /* No drawing has been done yet, so do nothing. */
 553    if (!arrays)
 554       return;
 555
 556    /* vertex program validation must be done before this */
 557    vp = st->vp;
 558    vpv = st->vp_variant;
 559
 560    memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
 561
 562    /*
 563     * Setup the vbuffer[] and velements[] arrays.
 564     */
 565    if (is_interleaved_arrays(vp, vpv, arrays)) {
 566       if (!setup_interleaved_attribs(vp, vpv, arrays, vbuffer, velements)) {
 567          st->vertex_array_out_of_memory = TRUE;
 568          return;
 569       }
 570
 571       num_vbuffers = 1;
 572       num_velements = vpv->num_inputs;
 573       if (num_velements == 0)
 574          num_vbuffers = 0;
 575    }
 576    else {
 577       if (!setup_non_interleaved_attribs(st, vp, vpv, arrays, vbuffer,
 578                                          velements)) {
 579          st->vertex_array_out_of_memory = TRUE;
 580          return;
 581       }
 582
 583       num_vbuffers = vpv->num_inputs;
 584       num_velements = vpv->num_inputs;
 585    }
 586
 587    cso_set_vertex_buffers(st->cso_context, 0, num_vbuffers, vbuffer);
 588    if (st->last_num_vbuffers > num_vbuffers) {
 589       /* Unbind remaining buffers, if any. */
 590       cso_set_vertex_buffers(st->cso_context, num_vbuffers,
 591                              st->last_num_vbuffers - num_vbuffers, NULL);
 592    }
 593    st->last_num_vbuffers = num_vbuffers;
 594    cso_set_vertex_elements(st->cso_context, num_velements, velements);
 595 }
 596
 597
 598 const struct st_tracked_state st_update_array = {
 599    "st_update_array",                                   /* name */
 600    {                                                    /* dirty */
 601       0,                                                /* mesa */
 602       ST_NEW_VERTEX_ARRAYS | ST_NEW_VERTEX_PROGRAM,     /* st */
 603    },
 604    update_array                                         /* update */
 605 };