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 #include "main/bufferobj.h"
  48 #include "main/glformats.h"
  49
  50
  51 static GLuint double_types[4] = {
  52    PIPE_FORMAT_R64_FLOAT,
  53    PIPE_FORMAT_R64G64_FLOAT,
  54    PIPE_FORMAT_R64G64B64_FLOAT,
  55    PIPE_FORMAT_R64G64B64A64_FLOAT
  56 };
  57
  58 static GLuint float_types[4] = {
  59    PIPE_FORMAT_R32_FLOAT,
  60    PIPE_FORMAT_R32G32_FLOAT,
  61    PIPE_FORMAT_R32G32B32_FLOAT,
  62    PIPE_FORMAT_R32G32B32A32_FLOAT
  63 };
  64
  65 static GLuint half_float_types[4] = {
  66    PIPE_FORMAT_R16_FLOAT,
  67    PIPE_FORMAT_R16G16_FLOAT,
  68    PIPE_FORMAT_R16G16B16_FLOAT,
  69    PIPE_FORMAT_R16G16B16A16_FLOAT
  70 };
  71
  72 static GLuint uint_types_norm[4] = {
  73    PIPE_FORMAT_R32_UNORM,
  74    PIPE_FORMAT_R32G32_UNORM,
  75    PIPE_FORMAT_R32G32B32_UNORM,
  76    PIPE_FORMAT_R32G32B32A32_UNORM
  77 };
  78
  79 static GLuint uint_types_scale[4] = {
  80    PIPE_FORMAT_R32_USCALED,
  81    PIPE_FORMAT_R32G32_USCALED,
  82    PIPE_FORMAT_R32G32B32_USCALED,
  83    PIPE_FORMAT_R32G32B32A32_USCALED
  84 };
  85
  86 static GLuint uint_types_int[4] = {
  87    PIPE_FORMAT_R32_UINT,
  88    PIPE_FORMAT_R32G32_UINT,
  89    PIPE_FORMAT_R32G32B32_UINT,
  90    PIPE_FORMAT_R32G32B32A32_UINT
  91 };
  92
  93 static GLuint int_types_norm[4] = {
  94    PIPE_FORMAT_R32_SNORM,
  95    PIPE_FORMAT_R32G32_SNORM,
  96    PIPE_FORMAT_R32G32B32_SNORM,
  97    PIPE_FORMAT_R32G32B32A32_SNORM
  98 };
  99
 100 static GLuint int_types_scale[4] = {
 101    PIPE_FORMAT_R32_SSCALED,
 102    PIPE_FORMAT_R32G32_SSCALED,
 103    PIPE_FORMAT_R32G32B32_SSCALED,
 104    PIPE_FORMAT_R32G32B32A32_SSCALED
 105 };
 106
 107 static GLuint int_types_int[4] = {
 108    PIPE_FORMAT_R32_SINT,
 109    PIPE_FORMAT_R32G32_SINT,
 110    PIPE_FORMAT_R32G32B32_SINT,
 111    PIPE_FORMAT_R32G32B32A32_SINT
 112 };
 113
 114 static GLuint ushort_types_norm[4] = {
 115    PIPE_FORMAT_R16_UNORM,
 116    PIPE_FORMAT_R16G16_UNORM,
 117    PIPE_FORMAT_R16G16B16_UNORM,
 118    PIPE_FORMAT_R16G16B16A16_UNORM
 119 };
 120
 121 static GLuint ushort_types_scale[4] = {
 122    PIPE_FORMAT_R16_USCALED,
 123    PIPE_FORMAT_R16G16_USCALED,
 124    PIPE_FORMAT_R16G16B16_USCALED,
 125    PIPE_FORMAT_R16G16B16A16_USCALED
 126 };
 127
 128 static GLuint ushort_types_int[4] = {
 129    PIPE_FORMAT_R16_UINT,
 130    PIPE_FORMAT_R16G16_UINT,
 131    PIPE_FORMAT_R16G16B16_UINT,
 132    PIPE_FORMAT_R16G16B16A16_UINT
 133 };
 134
 135 static GLuint short_types_norm[4] = {
 136    PIPE_FORMAT_R16_SNORM,
 137    PIPE_FORMAT_R16G16_SNORM,
 138    PIPE_FORMAT_R16G16B16_SNORM,
 139    PIPE_FORMAT_R16G16B16A16_SNORM
 140 };
 141
 142 static GLuint short_types_scale[4] = {
 143    PIPE_FORMAT_R16_SSCALED,
 144    PIPE_FORMAT_R16G16_SSCALED,
 145    PIPE_FORMAT_R16G16B16_SSCALED,
 146    PIPE_FORMAT_R16G16B16A16_SSCALED
 147 };
 148
 149 static GLuint short_types_int[4] = {
 150    PIPE_FORMAT_R16_SINT,
 151    PIPE_FORMAT_R16G16_SINT,
 152    PIPE_FORMAT_R16G16B16_SINT,
 153    PIPE_FORMAT_R16G16B16A16_SINT
 154 };
 155
 156 static GLuint ubyte_types_norm[4] = {
 157    PIPE_FORMAT_R8_UNORM,
 158    PIPE_FORMAT_R8G8_UNORM,
 159    PIPE_FORMAT_R8G8B8_UNORM,
 160    PIPE_FORMAT_R8G8B8A8_UNORM
 161 };
 162
 163 static GLuint ubyte_types_scale[4] = {
 164    PIPE_FORMAT_R8_USCALED,
 165    PIPE_FORMAT_R8G8_USCALED,
 166    PIPE_FORMAT_R8G8B8_USCALED,
 167    PIPE_FORMAT_R8G8B8A8_USCALED
 168 };
 169
 170 static GLuint ubyte_types_int[4] = {
 171    PIPE_FORMAT_R8_UINT,
 172    PIPE_FORMAT_R8G8_UINT,
 173    PIPE_FORMAT_R8G8B8_UINT,
 174    PIPE_FORMAT_R8G8B8A8_UINT
 175 };
 176
 177 static GLuint byte_types_norm[4] = {
 178    PIPE_FORMAT_R8_SNORM,
 179    PIPE_FORMAT_R8G8_SNORM,
 180    PIPE_FORMAT_R8G8B8_SNORM,
 181    PIPE_FORMAT_R8G8B8A8_SNORM
 182 };
 183
 184 static GLuint byte_types_scale[4] = {
 185    PIPE_FORMAT_R8_SSCALED,
 186    PIPE_FORMAT_R8G8_SSCALED,
 187    PIPE_FORMAT_R8G8B8_SSCALED,
 188    PIPE_FORMAT_R8G8B8A8_SSCALED
 189 };
 190
 191 static GLuint byte_types_int[4] = {
 192    PIPE_FORMAT_R8_SINT,
 193    PIPE_FORMAT_R8G8_SINT,
 194    PIPE_FORMAT_R8G8B8_SINT,
 195    PIPE_FORMAT_R8G8B8A8_SINT
 196 };
 197
 198 static GLuint fixed_types[4] = {
 199    PIPE_FORMAT_R32_FIXED,
 200    PIPE_FORMAT_R32G32_FIXED,
 201    PIPE_FORMAT_R32G32B32_FIXED,
 202    PIPE_FORMAT_R32G32B32A32_FIXED
 203 };
 204
 205
 206 /**
 207  * Return a PIPE_FORMAT_x for the given GL datatype and size.
 208  */
 209 enum pipe_format
 210 st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
 211                       GLboolean normalized, GLboolean integer)
 212 {
 213    assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
 214           type == GL_FIXED || type == GL_HALF_FLOAT ||
 215           type == GL_INT_2_10_10_10_REV ||
 216           type == GL_UNSIGNED_INT_2_10_10_10_REV ||
 217           type == GL_UNSIGNED_INT_10F_11F_11F_REV);
 218    assert(size >= 1);
 219    assert(size <= 4);
 220    assert(format == GL_RGBA || format == GL_BGRA);
 221
 222    if (type == GL_INT_2_10_10_10_REV ||
 223        type == GL_UNSIGNED_INT_2_10_10_10_REV) {
 224       assert(size == 4);
 225       assert(!integer);
 226
 227       if (format == GL_BGRA) {
 228          if (type == GL_INT_2_10_10_10_REV) {
 229             if (normalized)
 230                return PIPE_FORMAT_B10G10R10A2_SNORM;
 231             else
 232                return PIPE_FORMAT_B10G10R10A2_SSCALED;
 233          } else {
 234             if (normalized)
 235                return PIPE_FORMAT_B10G10R10A2_UNORM;
 236             else
 237                return PIPE_FORMAT_B10G10R10A2_USCALED;
 238          }
 239       } else {
 240          if (type == GL_INT_2_10_10_10_REV) {
 241             if (normalized)
 242                return PIPE_FORMAT_R10G10B10A2_SNORM;
 243             else
 244                return PIPE_FORMAT_R10G10B10A2_SSCALED;
 245          } else {
 246             if (normalized)
 247                return PIPE_FORMAT_R10G10B10A2_UNORM;
 248             else
 249                return PIPE_FORMAT_R10G10B10A2_USCALED;
 250          }
 251       }
 252    }
 253
 254    if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
 255       assert(size == 3);
 256       assert(!integer);
 257       assert(format == GL_RGBA);
 258
 259       return PIPE_FORMAT_R11G11B10_FLOAT;
 260    }
 261
 262    if (format == GL_BGRA) {
 263       /* this is an odd-ball case */
 264       assert(type == GL_UNSIGNED_BYTE);
 265       assert(normalized);
 266       return PIPE_FORMAT_B8G8R8A8_UNORM;
 267    }
 268
 269    if (integer) {
 270       switch (type) {
 271       case GL_INT: return int_types_int[size-1];
 272       case GL_SHORT: return short_types_int[size-1];
 273       case GL_BYTE: return byte_types_int[size-1];
 274       case GL_UNSIGNED_INT: return uint_types_int[size-1];
 275       case GL_UNSIGNED_SHORT: return ushort_types_int[size-1];
 276       case GL_UNSIGNED_BYTE: return ubyte_types_int[size-1];
 277       default: assert(0); return 0;
 278       }
 279    }
 280    else if (normalized) {
 281       switch (type) {
 282       case GL_DOUBLE: return double_types[size-1];
 283       case GL_FLOAT: return float_types[size-1];
 284       case GL_HALF_FLOAT: return half_float_types[size-1];
 285       case GL_INT: return int_types_norm[size-1];
 286       case GL_SHORT: return short_types_norm[size-1];
 287       case GL_BYTE: return byte_types_norm[size-1];
 288       case GL_UNSIGNED_INT: return uint_types_norm[size-1];
 289       case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
 290       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
 291       case GL_FIXED: return fixed_types[size-1];
 292       default: assert(0); return 0;
 293       }
 294    }
 295    else {
 296       switch (type) {
 297       case GL_DOUBLE: return double_types[size-1];
 298       case GL_FLOAT: return float_types[size-1];
 299       case GL_HALF_FLOAT: return half_float_types[size-1];
 300       case GL_INT: return int_types_scale[size-1];
 301       case GL_SHORT: return short_types_scale[size-1];
 302       case GL_BYTE: return byte_types_scale[size-1];
 303       case GL_UNSIGNED_INT: return uint_types_scale[size-1];
 304       case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
 305       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
 306       case GL_FIXED: return fixed_types[size-1];
 307       default: assert(0); return 0;
 308       }
 309    }
 310    return PIPE_FORMAT_NONE; /* silence compiler warning */
 311 }
 312
 313 static const struct gl_client_array *
 314 get_client_array(const struct st_vertex_program *vp,
 315                  const struct gl_client_array **arrays,
 316                  int attr)
 317 {
 318    const GLuint mesaAttr = vp->index_to_input[attr];
 319    /* st_program uses 0xffffffff to denote a double placeholder attribute */
 320    if (mesaAttr == ST_DOUBLE_ATTRIB_PLACEHOLDER)
 321       return NULL;
 322    return arrays[mesaAttr];
 323 }
 324
 325 /**
 326  * Examine the active arrays to determine if we have interleaved
 327  * vertex arrays all living in one VBO, or all living in user space.
 328  */
 329 static GLboolean
 330 is_interleaved_arrays(const struct st_vertex_program *vp,
 331                       const struct st_vp_variant *vpv,
 332                       const struct gl_client_array **arrays)
 333 {
 334    GLuint attr;
 335    const struct gl_buffer_object *firstBufObj = NULL;
 336    GLint firstStride = -1;
 337    const GLubyte *firstPtr = NULL;
 338    GLboolean userSpaceBuffer = GL_FALSE;
 339
 340    for (attr = 0; attr < vpv->num_inputs; attr++) {
 341       const struct gl_client_array *array;
 342       const struct gl_buffer_object *bufObj;
 343       GLsizei stride;
 344
 345       array = get_client_array(vp, arrays, attr);
 346       if (!array)
 347          continue;
 348
 349       stride = array->StrideB; /* in bytes */
 350       bufObj = array->BufferObj;
 351       if (attr == 0) {
 352          /* save info about the first array */
 353          firstStride = stride;
 354          firstPtr = array->Ptr;
 355          firstBufObj = bufObj;
 356          userSpaceBuffer = !bufObj || !bufObj->Name;
 357       }
 358       else {
 359          /* check if other arrays interleave with the first, in same buffer */
 360          if (stride != firstStride)
 361             return GL_FALSE; /* strides don't match */
 362
 363          if (bufObj != firstBufObj)
 364             return GL_FALSE; /* arrays in different VBOs */
 365
 366          if (llabs(array->Ptr - firstPtr) > firstStride)
 367             return GL_FALSE; /* arrays start too far apart */
 368
 369          if ((!_mesa_is_bufferobj(bufObj)) != userSpaceBuffer)
 370             return GL_FALSE; /* mix of VBO and user-space arrays */
 371       }
 372    }
 373
 374    return GL_TRUE;
 375 }
 376
 377 static void init_velement(struct pipe_vertex_element *velement,
 378                           int src_offset, int format,
 379                           int instance_divisor, int vbo_index)
 380 {
 381    velement->src_offset = src_offset;
 382    velement->src_format = format;
 383    velement->instance_divisor = instance_divisor;
 384    velement->vertex_buffer_index = vbo_index;
 385    assert(velement->src_format);
 386 }
 387
 388 static void init_velement_lowered(struct st_context *st,
 389                                   struct pipe_vertex_element *velements,
 390                                   int src_offset, int format,
 391                                   int instance_divisor, int vbo_index,
 392                                   int nr_components, GLboolean doubles,
 393                                   GLuint *attr_idx)
 394 {
 395    int idx = *attr_idx;
 396    if (doubles) {
 397       int lower_format;
 398
 399       if (nr_components == 1)
 400          lower_format = PIPE_FORMAT_R32G32_UINT;
 401       else if (nr_components >= 2)
 402          lower_format = PIPE_FORMAT_R32G32B32A32_UINT;
 403
 404       init_velement(&velements[idx], src_offset,
 405                     lower_format, instance_divisor, vbo_index);
 406       idx++;
 407
 408       if (nr_components > 2) {
 409          if (nr_components == 3)
 410             lower_format = PIPE_FORMAT_R32G32_UINT;
 411          else if (nr_components >= 4)
 412             lower_format = PIPE_FORMAT_R32G32B32A32_UINT;
 413
 414          init_velement(&velements[idx], src_offset + 4 * sizeof(float),
 415                        lower_format, instance_divisor, vbo_index);
 416          idx++;
 417       }
 418    } else {
 419       init_velement(&velements[idx], src_offset,
 420                     format, instance_divisor, vbo_index);
 421       idx++;
 422    }
 423    *attr_idx = idx;
 424 }
 425
 426 /**
 427  * Set up for drawing interleaved arrays that all live in one VBO
 428  * or all live in user space.
 429  * \param vbuffer  returns vertex buffer info
 430  * \param velements  returns vertex element info
 431  */
 432 static boolean
 433 setup_interleaved_attribs(struct st_context *st,
 434                           const struct st_vertex_program *vp,
 435                           const struct st_vp_variant *vpv,
 436                           const struct gl_client_array **arrays,
 437                           struct pipe_vertex_buffer *vbuffer,
 438                           struct pipe_vertex_element velements[],
 439                           unsigned *num_velements)
 440 {
 441    GLuint attr, attr_idx;
 442    const GLubyte *low_addr = NULL;
 443    GLboolean usingVBO;      /* all arrays in a VBO? */
 444    struct gl_buffer_object *bufobj;
 445    GLsizei stride;
 446
 447    /* Find the lowest address of the arrays we're drawing,
 448     * Init bufobj and stride.
 449     */
 450    if (vpv->num_inputs) {
 451       const struct gl_client_array *array;
 452
 453       array = get_client_array(vp, arrays, 0);
 454       assert(array);
 455
 456       /* Since we're doing interleaved arrays, we know there'll be at most
 457        * one buffer object and the stride will be the same for all arrays.
 458        * Grab them now.
 459        */
 460       bufobj = array->BufferObj;
 461       stride = array->StrideB;
 462
 463       low_addr = arrays[vp->index_to_input[0]]->Ptr;
 464
 465       for (attr = 1; attr < vpv->num_inputs; attr++) {
 466          const GLubyte *start;
 467          array = get_client_array(vp, arrays, attr);
 468          if (!array)
 469             continue;
 470          start = array->Ptr;
 471          low_addr = MIN2(low_addr, start);
 472       }
 473    }
 474    else {
 475       /* not sure we'll ever have zero inputs, but play it safe */
 476       bufobj = NULL;
 477       stride = 0;
 478       low_addr = 0;
 479    }
 480
 481    /* are the arrays in user space? */
 482    usingVBO = _mesa_is_bufferobj(bufobj);
 483
 484    attr_idx = 0;
 485    for (attr = 0; attr < vpv->num_inputs; attr++) {
 486       const struct gl_client_array *array;
 487       unsigned src_offset;
 488       unsigned src_format;
 489
 490       array = get_client_array(vp, arrays, attr);
 491       if (!array)
 492          continue;
 493
 494       src_offset = (unsigned) (array->Ptr - low_addr);
 495       assert(array->_ElementSize ==
 496              _mesa_bytes_per_vertex_attrib(array->Size, array->Type));
 497
 498       src_format = st_pipe_vertex_format(array->Type,
 499                                          array->Size,
 500                                          array->Format,
 501                                          array->Normalized,
 502                                          array->Integer);
 503
 504       init_velement_lowered(st, velements, src_offset, src_format,
 505                             array->InstanceDivisor, 0,
 506                             array->Size, array->Doubles, &attr_idx);
 507    }
 508
 509    *num_velements = attr_idx;
 510
 511    /*
 512     * Return the vbuffer info and setup user-space attrib info, if needed.
 513     */
 514    if (vpv->num_inputs == 0) {
 515       /* just defensive coding here */
 516       vbuffer->buffer = NULL;
 517       vbuffer->user_buffer = NULL;
 518       vbuffer->buffer_offset = 0;
 519       vbuffer->stride = 0;
 520    }
 521    else if (usingVBO) {
 522       /* all interleaved arrays in a VBO */
 523       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 524
 525       if (!stobj || !stobj->buffer) {
 526          return FALSE; /* out-of-memory error probably */
 527       }
 528
 529       vbuffer->buffer = stobj->buffer;
 530       vbuffer->user_buffer = NULL;
 531       vbuffer->buffer_offset = pointer_to_offset(low_addr);
 532       vbuffer->stride = stride;
 533    }
 534    else {
 535       /* all interleaved arrays in user memory */
 536       vbuffer->buffer = NULL;
 537       vbuffer->user_buffer = low_addr;
 538       vbuffer->buffer_offset = 0;
 539       vbuffer->stride = stride;
 540    }
 541    return TRUE;
 542 }
 543
 544 /**
 545  * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
 546  * vertex attribute.
 547  * \param vbuffer  returns vertex buffer info
 548  * \param velements  returns vertex element info
 549  */
 550 static boolean
 551 setup_non_interleaved_attribs(struct st_context *st,
 552                               const struct st_vertex_program *vp,
 553                               const struct st_vp_variant *vpv,
 554                               const struct gl_client_array **arrays,
 555                               struct pipe_vertex_buffer vbuffer[],
 556                               struct pipe_vertex_element velements[],
 557                               unsigned *num_velements)
 558 {
 559    struct gl_context *ctx = st->ctx;
 560    GLuint attr, attr_idx = 0;
 561
 562    for (attr = 0; attr < vpv->num_inputs; attr++) {
 563       const GLuint mesaAttr = vp->index_to_input[attr];
 564       const struct gl_client_array *array;
 565       struct gl_buffer_object *bufobj;
 566       GLsizei stride;
 567       unsigned src_format;
 568
 569       array = get_client_array(vp, arrays, attr);
 570       if (!array) {
 571          vbuffer[attr].buffer = NULL;
 572          vbuffer[attr].user_buffer = NULL;
 573          vbuffer[attr].buffer_offset = 0;
 574          continue;
 575       }
 576
 577       stride = array->StrideB;
 578       bufobj = array->BufferObj;
 579       assert(array->_ElementSize ==
 580              _mesa_bytes_per_vertex_attrib(array->Size, array->Type));
 581
 582       if (_mesa_is_bufferobj(bufobj)) {
 583          /* Attribute data is in a VBO.
 584           * Recall that for VBOs, the gl_client_array->Ptr field is
 585           * really an offset from the start of the VBO, not a pointer.
 586           */
 587          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 588
 589          if (!stobj || !stobj->buffer) {
 590             return FALSE; /* out-of-memory error probably */
 591          }
 592
 593          vbuffer[attr].buffer = stobj->buffer;
 594          vbuffer[attr].user_buffer = NULL;
 595          vbuffer[attr].buffer_offset = pointer_to_offset(array->Ptr);
 596       }
 597       else {
 598          /* wrap user data */
 599          void *ptr;
 600
 601          if (array->Ptr) {
 602             ptr = (void *) array->Ptr;
 603          }
 604          else {
 605             /* no array, use ctx->Current.Attrib[] value */
 606             ptr = (void *) ctx->Current.Attrib[mesaAttr];
 607             stride = 0;
 608          }
 609
 610          assert(ptr);
 611
 612          vbuffer[attr].buffer = NULL;
 613          vbuffer[attr].user_buffer = ptr;
 614          vbuffer[attr].buffer_offset = 0;
 615       }
 616
 617       /* common-case setup */
 618       vbuffer[attr].stride = stride; /* in bytes */
 619
 620       src_format = st_pipe_vertex_format(array->Type,
 621                                          array->Size,
 622                                          array->Format,
 623                                          array->Normalized,
 624                                          array->Integer);
 625
 626       init_velement_lowered(st, velements, 0, src_format,
 627                             array->InstanceDivisor, attr,
 628                             array->Size, array->Doubles, &attr_idx);
 629
 630    }
 631
 632    *num_velements = attr_idx;
 633    return TRUE;
 634 }
 635
 636 static void update_array(struct st_context *st)
 637 {
 638    struct gl_context *ctx = st->ctx;
 639    const struct gl_client_array **arrays = ctx->Array._DrawArrays;
 640    const struct st_vertex_program *vp;
 641    const struct st_vp_variant *vpv;
 642    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 643    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 644    unsigned num_vbuffers, num_velements;
 645
 646    st->vertex_array_out_of_memory = FALSE;
 647
 648    /* No drawing has been done yet, so do nothing. */
 649    if (!arrays)
 650       return;
 651
 652    /* vertex program validation must be done before this */
 653    vp = st->vp;
 654    vpv = st->vp_variant;
 655
 656    memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
 657
 658    /*
 659     * Setup the vbuffer[] and velements[] arrays.
 660     */
 661    if (is_interleaved_arrays(vp, vpv, arrays)) {
 662       if (!setup_interleaved_attribs(st, vp, vpv, arrays, vbuffer, velements, &num_velements)) {
 663          st->vertex_array_out_of_memory = TRUE;
 664          return;
 665       }
 666
 667       num_vbuffers = 1;
 668       if (num_velements == 0)
 669          num_vbuffers = 0;
 670    }
 671    else {
 672       if (!setup_non_interleaved_attribs(st, vp, vpv, arrays, vbuffer,
 673                                          velements, &num_velements)) {
 674          st->vertex_array_out_of_memory = TRUE;
 675          return;
 676       }
 677
 678       num_vbuffers = vpv->num_inputs;
 679    }
 680
 681    cso_set_vertex_buffers(st->cso_context, 0, num_vbuffers, vbuffer);
 682    if (st->last_num_vbuffers > num_vbuffers) {
 683       /* Unbind remaining buffers, if any. */
 684       cso_set_vertex_buffers(st->cso_context, num_vbuffers,
 685                              st->last_num_vbuffers - num_vbuffers, NULL);
 686    }
 687    st->last_num_vbuffers = num_vbuffers;
 688    cso_set_vertex_elements(st->cso_context, num_velements, velements);
 689 }
 690
 691
 692 const struct st_tracked_state st_update_array = {
 693    update_array                                         /* update */
 694 };