src/mesa/drivers/dri/i965/brw_draw_upload.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * 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
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <stdlib.h>
  29
  30 #include "glheader.h"
  31 #include "context.h"
  32 #include "state.h"
  33 #include "api_validate.h"
  34 #include "enums.h"
  35
  36 #include "brw_draw.h"
  37 #include "brw_defines.h"
  38 #include "brw_context.h"
  39 #include "brw_aub.h"
  40 #include "brw_state.h"
  41 #include "brw_fallback.h"
  42
  43 #include "intel_ioctl.h"
  44 #include "intel_batchbuffer.h"
  45 #include "intel_buffer_objects.h"
  46
  47
  48 struct brw_array_state {
  49    union header_union header;
  50
  51    struct {
  52       union {
  53          struct {
  54             GLuint pitch:11;
  55             GLuint pad:15;
  56             GLuint access_type:1;
  57             GLuint vb_index:5;
  58          } bits;
  59          GLuint dword;
  60       } vb0;
  61
  62       struct buffer *buffer;
  63       GLuint offset;
  64
  65       GLuint max_index;
  66       GLuint instance_data_step_rate;
  67
  68    } vb[BRW_VBP_MAX];
  69 };
  70
  71
  72 static struct buffer *array_buffer( const struct gl_client_array *array )
  73 {
  74    return intel_bufferobj_buffer(intel_buffer_object(array->BufferObj));
  75 }
  76
  77 static GLuint double_types[5] = {
  78    0,
  79    BRW_SURFACEFORMAT_R64_FLOAT,
  80    BRW_SURFACEFORMAT_R64G64_FLOAT,
  81    BRW_SURFACEFORMAT_R64G64B64_FLOAT,
  82    BRW_SURFACEFORMAT_R64G64B64A64_FLOAT
  83 };
  84
  85 static GLuint float_types[5] = {
  86    0,
  87    BRW_SURFACEFORMAT_R32_FLOAT,
  88    BRW_SURFACEFORMAT_R32G32_FLOAT,
  89    BRW_SURFACEFORMAT_R32G32B32_FLOAT,
  90    BRW_SURFACEFORMAT_R32G32B32A32_FLOAT
  91 };
  92
  93 static GLuint uint_types_norm[5] = {
  94    0,
  95    BRW_SURFACEFORMAT_R32_UNORM,
  96    BRW_SURFACEFORMAT_R32G32_UNORM,
  97    BRW_SURFACEFORMAT_R32G32B32_UNORM,
  98    BRW_SURFACEFORMAT_R32G32B32A32_UNORM
  99 };
 100
 101 static GLuint uint_types_scale[5] = {
 102    0,
 103    BRW_SURFACEFORMAT_R32_USCALED,
 104    BRW_SURFACEFORMAT_R32G32_USCALED,
 105    BRW_SURFACEFORMAT_R32G32B32_USCALED,
 106    BRW_SURFACEFORMAT_R32G32B32A32_USCALED
 107 };
 108
 109 static GLuint int_types_norm[5] = {
 110    0,
 111    BRW_SURFACEFORMAT_R32_SNORM,
 112    BRW_SURFACEFORMAT_R32G32_SNORM,
 113    BRW_SURFACEFORMAT_R32G32B32_SNORM,
 114    BRW_SURFACEFORMAT_R32G32B32A32_SNORM
 115 };
 116
 117 static GLuint int_types_scale[5] = {
 118    0,
 119    BRW_SURFACEFORMAT_R32_SSCALED,
 120    BRW_SURFACEFORMAT_R32G32_SSCALED,
 121    BRW_SURFACEFORMAT_R32G32B32_SSCALED,
 122    BRW_SURFACEFORMAT_R32G32B32A32_SSCALED
 123 };
 124
 125 static GLuint ushort_types_norm[5] = {
 126    0,
 127    BRW_SURFACEFORMAT_R16_UNORM,
 128    BRW_SURFACEFORMAT_R16G16_UNORM,
 129    BRW_SURFACEFORMAT_R16G16B16_UNORM,
 130    BRW_SURFACEFORMAT_R16G16B16A16_UNORM
 131 };
 132
 133 static GLuint ushort_types_scale[5] = {
 134    0,
 135    BRW_SURFACEFORMAT_R16_USCALED,
 136    BRW_SURFACEFORMAT_R16G16_USCALED,
 137    BRW_SURFACEFORMAT_R16G16B16_USCALED,
 138    BRW_SURFACEFORMAT_R16G16B16A16_USCALED
 139 };
 140
 141 static GLuint short_types_norm[5] = {
 142    0,
 143    BRW_SURFACEFORMAT_R16_SNORM,
 144    BRW_SURFACEFORMAT_R16G16_SNORM,
 145    BRW_SURFACEFORMAT_R16G16B16_SNORM,
 146    BRW_SURFACEFORMAT_R16G16B16A16_SNORM
 147 };
 148
 149 static GLuint short_types_scale[5] = {
 150    0,
 151    BRW_SURFACEFORMAT_R16_SSCALED,
 152    BRW_SURFACEFORMAT_R16G16_SSCALED,
 153    BRW_SURFACEFORMAT_R16G16B16_SSCALED,
 154    BRW_SURFACEFORMAT_R16G16B16A16_SSCALED
 155 };
 156
 157 static GLuint ubyte_types_norm[5] = {
 158    0,
 159    BRW_SURFACEFORMAT_R8_UNORM,
 160    BRW_SURFACEFORMAT_R8G8_UNORM,
 161    BRW_SURFACEFORMAT_R8G8B8_UNORM,
 162    BRW_SURFACEFORMAT_R8G8B8A8_UNORM
 163 };
 164
 165 static GLuint ubyte_types_scale[5] = {
 166    0,
 167    BRW_SURFACEFORMAT_R8_USCALED,
 168    BRW_SURFACEFORMAT_R8G8_USCALED,
 169    BRW_SURFACEFORMAT_R8G8B8_USCALED,
 170    BRW_SURFACEFORMAT_R8G8B8A8_USCALED
 171 };
 172
 173 static GLuint byte_types_norm[5] = {
 174    0,
 175    BRW_SURFACEFORMAT_R8_SNORM,
 176    BRW_SURFACEFORMAT_R8G8_SNORM,
 177    BRW_SURFACEFORMAT_R8G8B8_SNORM,
 178    BRW_SURFACEFORMAT_R8G8B8A8_SNORM
 179 };
 180
 181 static GLuint byte_types_scale[5] = {
 182    0,
 183    BRW_SURFACEFORMAT_R8_SSCALED,
 184    BRW_SURFACEFORMAT_R8G8_SSCALED,
 185    BRW_SURFACEFORMAT_R8G8B8_SSCALED,
 186    BRW_SURFACEFORMAT_R8G8B8A8_SSCALED
 187 };
 188
 189
 190 static GLuint get_surface_type( GLenum type, GLuint size, GLboolean normalized )
 191 {
 192    if (INTEL_DEBUG & DEBUG_VERTS)
 193       _mesa_printf("type %s size %d normalized %d\n",
 194                    _mesa_lookup_enum_by_nr(type), size, normalized);
 195
 196    if (normalized) {
 197       switch (type) {
 198       case GL_DOUBLE: return double_types[size];
 199       case GL_FLOAT: return float_types[size];
 200       case GL_INT: return int_types_norm[size];
 201       case GL_SHORT: return short_types_norm[size];
 202       case GL_BYTE: return byte_types_norm[size];
 203       case GL_UNSIGNED_INT: return uint_types_norm[size];
 204       case GL_UNSIGNED_SHORT: return ushort_types_norm[size];
 205       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size];
 206       default: assert(0); return 0;
 207       }
 208    }
 209    else {
 210       switch (type) {
 211       case GL_DOUBLE: return double_types[size];
 212       case GL_FLOAT: return float_types[size];
 213       case GL_INT: return int_types_scale[size];
 214       case GL_SHORT: return short_types_scale[size];
 215       case GL_BYTE: return byte_types_scale[size];
 216       case GL_UNSIGNED_INT: return uint_types_scale[size];
 217       case GL_UNSIGNED_SHORT: return ushort_types_scale[size];
 218       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size];
 219       default: assert(0); return 0;
 220       }
 221    }
 222 }
 223
 224
 225 static GLuint get_size( GLenum type )
 226 {
 227    switch (type) {
 228    case GL_DOUBLE: return sizeof(GLdouble);
 229    case GL_FLOAT: return sizeof(GLfloat);
 230    case GL_INT: return sizeof(GLint);
 231    case GL_SHORT: return sizeof(GLshort);
 232    case GL_BYTE: return sizeof(GLbyte);
 233    case GL_UNSIGNED_INT: return sizeof(GLuint);
 234    case GL_UNSIGNED_SHORT: return sizeof(GLushort);
 235    case GL_UNSIGNED_BYTE: return sizeof(GLubyte);
 236    default: return 0;
 237    }
 238 }
 239
 240 static GLuint get_index_type(GLenum type)
 241 {
 242    switch (type) {
 243    case GL_UNSIGNED_BYTE:  return BRW_INDEX_BYTE;
 244    case GL_UNSIGNED_SHORT: return BRW_INDEX_WORD;
 245    case GL_UNSIGNED_INT:   return BRW_INDEX_DWORD;
 246    default: assert(0); return 0;
 247    }
 248 }
 249
 250 static void copy_strided_array( GLubyte *dest,
 251                                 const GLubyte *src,
 252                                 GLuint size,
 253                                 GLuint stride,
 254                                 GLuint count )
 255 {
 256    if (size == stride)
 257       do_memcpy(dest, src, count * size);
 258    else {
 259       GLuint i,j;
 260
 261       for (i = 0; i < count; i++) {
 262          for (j = 0; j < size; j++)
 263             *dest++ = *src++;
 264          src += (stride - size);
 265       }
 266    }
 267 }
 268
 269 static void wrap_buffers( struct brw_context *brw,
 270                           GLuint size )
 271 {
 272    GLcontext *ctx = &brw->intel.ctx;
 273
 274    if (size < BRW_UPLOAD_INIT_SIZE)
 275       size = BRW_UPLOAD_INIT_SIZE;
 276
 277    brw->vb.upload.buf++;
 278    brw->vb.upload.buf %= BRW_NR_UPLOAD_BUFS;
 279    brw->vb.upload.offset = 0;
 280
 281    ctx->Driver.BufferData(ctx,
 282                           GL_ARRAY_BUFFER_ARB,
 283                           size,
 284                           NULL,
 285                           GL_DYNAMIC_DRAW_ARB,
 286                           brw->vb.upload.vbo[brw->vb.upload.buf]);
 287 }
 288
 289 static void get_space( struct brw_context *brw,
 290                        GLuint size,
 291                        struct gl_buffer_object **vbo_return,
 292                        GLuint *offset_return )
 293 {
 294    size = (size + 63) & ~63;
 295
 296    if (brw->vb.upload.offset + size > BRW_UPLOAD_INIT_SIZE)
 297       wrap_buffers(brw, size);
 298
 299    *vbo_return = brw->vb.upload.vbo[brw->vb.upload.buf];
 300    *offset_return = brw->vb.upload.offset;
 301
 302    brw->vb.upload.offset += size;
 303 }
 304
 305
 306
 307 static struct gl_client_array *
 308 copy_array_to_vbo_array( struct brw_context *brw,
 309                          GLuint i,
 310                          const struct gl_client_array *array,
 311                          GLuint element_size,
 312                          GLuint count)
 313 {
 314    GLcontext *ctx = &brw->intel.ctx;
 315    struct gl_client_array *vbo_array = &brw->vb.vbo_array[i];
 316    GLuint size = count * element_size;
 317    struct gl_buffer_object *vbo;
 318    GLuint offset;
 319    GLuint new_stride;
 320
 321    get_space(brw, size, &vbo, &offset);
 322
 323    if (array->StrideB == 0) {
 324       assert(count == 1);
 325       new_stride = 0;
 326    }
 327    else
 328       new_stride = element_size;
 329
 330    vbo_array->Size = array->Size;
 331    vbo_array->Type = array->Type;
 332    vbo_array->Stride = new_stride;
 333    vbo_array->StrideB = new_stride;
 334    vbo_array->Ptr = (const void *)offset;
 335    vbo_array->Enabled = 1;
 336    vbo_array->Normalized = array->Normalized;
 337    vbo_array->_MaxElement = array->_MaxElement; /* ? */
 338    vbo_array->BufferObj = vbo;
 339
 340    {
 341       GLubyte *map = ctx->Driver.MapBuffer(ctx,
 342                                            GL_ARRAY_BUFFER_ARB,
 343                                            GL_DYNAMIC_DRAW_ARB,
 344                                            vbo);
 345
 346       map += offset;
 347
 348       copy_strided_array( map,
 349                           array->Ptr,
 350                           element_size,
 351                           array->StrideB,
 352                           count);
 353
 354       ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, vbo_array->BufferObj);
 355    }
 356
 357    return vbo_array;
 358 }
 359
 360
 361
 362 static struct gl_client_array *
 363 interleaved_vbo_array( struct brw_context *brw,
 364                        GLuint i,
 365                        const struct gl_client_array *uploaded_array,
 366                        const struct gl_client_array *array,
 367                        const char *ptr)
 368 {
 369    struct gl_client_array *vbo_array = &brw->vb.vbo_array[i];
 370
 371    vbo_array->Size = array->Size;
 372    vbo_array->Type = array->Type;
 373    vbo_array->Stride = array->Stride;
 374    vbo_array->StrideB = array->StrideB;
 375    vbo_array->Ptr = (const void *)((const char *)uploaded_array->Ptr +
 376                                    ((const char *)array->Ptr - ptr));
 377    vbo_array->Enabled = 1;
 378    vbo_array->Normalized = array->Normalized;
 379    vbo_array->_MaxElement = array->_MaxElement;
 380    vbo_array->BufferObj = uploaded_array->BufferObj;
 381
 382    return vbo_array;
 383 }
 384
 385
 386 GLboolean brw_upload_vertices( struct brw_context *brw,
 387                                GLuint min_index,
 388                                GLuint max_index )
 389 {
 390    GLcontext *ctx = &brw->intel.ctx;
 391    struct intel_context *intel = intel_context(ctx);
 392    GLuint tmp = brw->vs.prog_data->inputs_read;
 393    struct brw_vertex_element_packet vep;
 394    struct brw_array_state vbp;
 395    GLuint i;
 396    const void *ptr = NULL;
 397    GLuint interleave = 0;
 398
 399    struct brw_vertex_element *enabled[VERT_ATTRIB_MAX];
 400    GLuint nr_enabled = 0;
 401
 402    struct brw_vertex_element *upload[VERT_ATTRIB_MAX];
 403    GLuint nr_uploads = 0;
 404
 405
 406    memset(&vbp, 0, sizeof(vbp));
 407    memset(&vep, 0, sizeof(vep));
 408
 409    /* First build an array of pointers to ve's in vb.inputs_read
 410     */
 411    if (0)
 412       _mesa_printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
 413
 414    while (tmp) {
 415       GLuint i = _mesa_ffsll(tmp)-1;
 416       struct brw_vertex_element *input = &brw->vb.inputs[i];
 417
 418       tmp &= ~(1<<i);
 419       enabled[nr_enabled++] = input;
 420
 421       input->index = i;
 422       input->element_size = get_size(input->glarray->Type) * input->glarray->Size;
 423       input->count = input->glarray->StrideB ? max_index + 1 - min_index : 1;
 424
 425       if (!input->glarray->BufferObj->Name) {
 426          if (i == 0) {
 427             /* Position array not properly enabled:
 428              */
 429             if (input->glarray->StrideB == 0)
 430                return GL_FALSE;
 431
 432             interleave = input->glarray->StrideB;
 433             ptr = input->glarray->Ptr;
 434          }
 435          else if (interleave != input->glarray->StrideB ||
 436                   (const char *)input->glarray->Ptr - (const char *)ptr < 0 ||
 437                   (const char *)input->glarray->Ptr - (const char *)ptr > interleave) {
 438             interleave = 0;
 439          }
 440
 441          upload[nr_uploads++] = input;
 442
 443          /* We rebase drawing to start at element zero only when
 444           * varyings are not in vbos, which means we can end up
 445           * uploading non-varying arrays (stride != 0) when min_index
 446           * is zero.  This doesn't matter as the amount to upload is
 447           * the same for these arrays whether the draw call is rebased
 448           * or not - we just have to upload the one element.
 449           */
 450          assert(min_index == 0 || input->glarray->StrideB == 0);
 451       }
 452    }
 453
 454    /* Upload interleaved arrays if all uploads are interleaved
 455     */
 456    if (nr_uploads > 1 &&
 457        interleave &&
 458        interleave <= 256) {
 459       struct brw_vertex_element *input0 = upload[0];
 460
 461       input0->glarray = copy_array_to_vbo_array(brw, 0,
 462                                                 input0->glarray,
 463                                                 interleave,
 464                                                 input0->count);
 465
 466       for (i = 1; i < nr_uploads; i++) {
 467          upload[i]->glarray = interleaved_vbo_array(brw,
 468                                                     i,
 469                                                     input0->glarray,
 470                                                     upload[i]->glarray,
 471                                                     ptr);
 472       }
 473    }
 474    else {
 475       for (i = 0; i < nr_uploads; i++) {
 476          struct brw_vertex_element *input = upload[i];
 477
 478          input->glarray = copy_array_to_vbo_array(brw, i,
 479                                                   input->glarray,
 480                                                   input->element_size,
 481                                                   input->count);
 482
 483       }
 484    }
 485
 486    /* XXX: In the rare cases where this happens we fallback all
 487     * the way to software rasterization, although a tnl fallback
 488     * would be sufficient.  I don't know of *any* real world
 489     * cases with > 17 vertex attributes enabled, so it probably
 490     * isn't an issue at this point.
 491     */
 492    if (nr_enabled >= BRW_VEP_MAX)
 493          return GL_FALSE;
 494
 495    /* This still defines a hardware VB for each input, even if they
 496     * are interleaved or from the same VBO.  TBD if this makes a
 497     * performance difference.
 498     */
 499    for (i = 0; i < nr_enabled; i++) {
 500       struct brw_vertex_element *input = enabled[i];
 501
 502       input->vep = &vep.ve[i];
 503       input->vep->ve0.src_format = get_surface_type(input->glarray->Type,
 504                                                     input->glarray->Size,
 505                                                     input->glarray->Normalized);
 506       input->vep->ve0.valid = 1;
 507       input->vep->ve1.dst_offset = (i) * 4;
 508       input->vep->ve1.vfcomponent3 = BRW_VFCOMPONENT_STORE_SRC;
 509       input->vep->ve1.vfcomponent2 = BRW_VFCOMPONENT_STORE_SRC;
 510       input->vep->ve1.vfcomponent1 = BRW_VFCOMPONENT_STORE_SRC;
 511       input->vep->ve1.vfcomponent0 = BRW_VFCOMPONENT_STORE_SRC;
 512
 513       switch (input->glarray->Size) {
 514       case 0: input->vep->ve1.vfcomponent0 = BRW_VFCOMPONENT_STORE_0;
 515       case 1: input->vep->ve1.vfcomponent1 = BRW_VFCOMPONENT_STORE_0;
 516       case 2: input->vep->ve1.vfcomponent2 = BRW_VFCOMPONENT_STORE_0;
 517       case 3: input->vep->ve1.vfcomponent3 = BRW_VFCOMPONENT_STORE_1_FLT;
 518          break;
 519       }
 520
 521       input->vep->ve0.vertex_buffer_index = i;
 522       input->vep->ve0.src_offset = 0;
 523
 524       vbp.vb[i].vb0.bits.pitch = input->glarray->StrideB;
 525       vbp.vb[i].vb0.bits.pad = 0;
 526       vbp.vb[i].vb0.bits.access_type = BRW_VERTEXBUFFER_ACCESS_VERTEXDATA;
 527       vbp.vb[i].vb0.bits.vb_index = i;
 528       vbp.vb[i].offset = (GLuint)input->glarray->Ptr;
 529       vbp.vb[i].buffer = array_buffer(input->glarray);
 530       vbp.vb[i].max_index = max_index;
 531    }
 532
 533
 534
 535    /* Now emit VB and VEP state packets:
 536     */
 537    vbp.header.bits.length = (1 + nr_enabled * 4) - 2;
 538    vbp.header.bits.opcode = CMD_VERTEX_BUFFER;
 539
 540    BEGIN_BATCH(vbp.header.bits.length+2, 0);
 541    OUT_BATCH( vbp.header.dword );
 542
 543    for (i = 0; i < nr_enabled; i++) {
 544       OUT_BATCH( vbp.vb[i].vb0.dword );
 545       OUT_BATCH( bmBufferOffset(&brw->intel, vbp.vb[i].buffer) + vbp.vb[i].offset);
 546       OUT_BATCH( vbp.vb[i].max_index );
 547       OUT_BATCH( vbp.vb[i].instance_data_step_rate );
 548    }
 549    ADVANCE_BATCH();
 550
 551    vep.header.length = (1 + nr_enabled * sizeof(vep.ve[0])/4) - 2;
 552    vep.header.opcode = CMD_VERTEX_ELEMENT;
 553    brw_cached_batch_struct(brw, &vep, 4 + nr_enabled * sizeof(vep.ve[0]));
 554
 555    return GL_TRUE;
 556 }
 557
 558
 559 static GLuint element_size( GLenum type )
 560 {
 561    switch(type) {
 562    case GL_UNSIGNED_INT: return 4;
 563    case GL_UNSIGNED_SHORT: return 2;
 564    case GL_UNSIGNED_BYTE: return 1;
 565    default: assert(0); return 0;
 566    }
 567 }
 568
 569
 570
 571 void brw_upload_indices( struct brw_context *brw,
 572                          const struct _mesa_index_buffer *index_buffer )
 573 {
 574    GLcontext *ctx = &brw->intel.ctx;
 575    struct intel_context *intel = &brw->intel;
 576    GLuint ib_size = get_size(index_buffer->type) * index_buffer->count;
 577    struct gl_buffer_object *bufferobj = index_buffer->obj;
 578    GLuint offset = (GLuint)index_buffer->ptr;
 579
 580    /* Turn into a proper VBO:
 581     */
 582    if (!bufferobj->Name) {
 583
 584       /* Get new bufferobj, offset:
 585        */
 586       get_space(brw, ib_size, &bufferobj, &offset);
 587
 588       /* Straight upload
 589        */
 590       ctx->Driver.BufferSubData( ctx,
 591                                  GL_ELEMENT_ARRAY_BUFFER_ARB,
 592                                  offset,
 593                                  ib_size,
 594                                  index_buffer->ptr,
 595                                  bufferobj);
 596    }
 597
 598    /* Emit the indexbuffer packet:
 599     */
 600    {
 601       struct brw_indexbuffer ib;
 602       struct buffer *buffer = intel_bufferobj_buffer(intel_buffer_object(bufferobj));
 603
 604       memset(&ib, 0, sizeof(ib));
 605
 606       ib.header.bits.opcode = CMD_INDEX_BUFFER;
 607       ib.header.bits.length = sizeof(ib)/4 - 2;
 608       ib.header.bits.index_format = get_index_type(index_buffer->type);
 609       ib.header.bits.cut_index_enable = 0;
 610
 611
 612       BEGIN_BATCH(4, 0);
 613       OUT_BATCH( ib.header.dword );
 614       OUT_BATCH( bmBufferOffset(intel, buffer) + offset );
 615       OUT_BATCH( bmBufferOffset(intel, buffer) + offset + ib_size );
 616       OUT_BATCH( 0 );
 617       ADVANCE_BATCH();
 618    }
 619 }