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 "main/glheader.h"
  31 #include "main/context.h"
  32 #include "main/state.h"
  33 #include "main/api_validate.h"
  34 #include "main/enums.h"
  35
  36 #include "brw_draw.h"
  37 #include "brw_defines.h"
  38 #include "brw_context.h"
  39 #include "brw_state.h"
  40 #include "brw_fallback.h"
  41
  42 #include "intel_batchbuffer.h"
  43 #include "intel_buffer_objects.h"
  44 #include "intel_tex.h"
  45
  46 static GLuint double_types[5] = {
  47    0,
  48    BRW_SURFACEFORMAT_R64_FLOAT,
  49    BRW_SURFACEFORMAT_R64G64_FLOAT,
  50    BRW_SURFACEFORMAT_R64G64B64_FLOAT,
  51    BRW_SURFACEFORMAT_R64G64B64A64_FLOAT
  52 };
  53
  54 static GLuint float_types[5] = {
  55    0,
  56    BRW_SURFACEFORMAT_R32_FLOAT,
  57    BRW_SURFACEFORMAT_R32G32_FLOAT,
  58    BRW_SURFACEFORMAT_R32G32B32_FLOAT,
  59    BRW_SURFACEFORMAT_R32G32B32A32_FLOAT
  60 };
  61
  62 static GLuint uint_types_norm[5] = {
  63    0,
  64    BRW_SURFACEFORMAT_R32_UNORM,
  65    BRW_SURFACEFORMAT_R32G32_UNORM,
  66    BRW_SURFACEFORMAT_R32G32B32_UNORM,
  67    BRW_SURFACEFORMAT_R32G32B32A32_UNORM
  68 };
  69
  70 static GLuint uint_types_scale[5] = {
  71    0,
  72    BRW_SURFACEFORMAT_R32_USCALED,
  73    BRW_SURFACEFORMAT_R32G32_USCALED,
  74    BRW_SURFACEFORMAT_R32G32B32_USCALED,
  75    BRW_SURFACEFORMAT_R32G32B32A32_USCALED
  76 };
  77
  78 static GLuint int_types_norm[5] = {
  79    0,
  80    BRW_SURFACEFORMAT_R32_SNORM,
  81    BRW_SURFACEFORMAT_R32G32_SNORM,
  82    BRW_SURFACEFORMAT_R32G32B32_SNORM,
  83    BRW_SURFACEFORMAT_R32G32B32A32_SNORM
  84 };
  85
  86 static GLuint int_types_scale[5] = {
  87    0,
  88    BRW_SURFACEFORMAT_R32_SSCALED,
  89    BRW_SURFACEFORMAT_R32G32_SSCALED,
  90    BRW_SURFACEFORMAT_R32G32B32_SSCALED,
  91    BRW_SURFACEFORMAT_R32G32B32A32_SSCALED
  92 };
  93
  94 static GLuint ushort_types_norm[5] = {
  95    0,
  96    BRW_SURFACEFORMAT_R16_UNORM,
  97    BRW_SURFACEFORMAT_R16G16_UNORM,
  98    BRW_SURFACEFORMAT_R16G16B16_UNORM,
  99    BRW_SURFACEFORMAT_R16G16B16A16_UNORM
 100 };
 101
 102 static GLuint ushort_types_scale[5] = {
 103    0,
 104    BRW_SURFACEFORMAT_R16_USCALED,
 105    BRW_SURFACEFORMAT_R16G16_USCALED,
 106    BRW_SURFACEFORMAT_R16G16B16_USCALED,
 107    BRW_SURFACEFORMAT_R16G16B16A16_USCALED
 108 };
 109
 110 static GLuint short_types_norm[5] = {
 111    0,
 112    BRW_SURFACEFORMAT_R16_SNORM,
 113    BRW_SURFACEFORMAT_R16G16_SNORM,
 114    BRW_SURFACEFORMAT_R16G16B16_SNORM,
 115    BRW_SURFACEFORMAT_R16G16B16A16_SNORM
 116 };
 117
 118 static GLuint short_types_scale[5] = {
 119    0,
 120    BRW_SURFACEFORMAT_R16_SSCALED,
 121    BRW_SURFACEFORMAT_R16G16_SSCALED,
 122    BRW_SURFACEFORMAT_R16G16B16_SSCALED,
 123    BRW_SURFACEFORMAT_R16G16B16A16_SSCALED
 124 };
 125
 126 static GLuint ubyte_types_norm[5] = {
 127    0,
 128    BRW_SURFACEFORMAT_R8_UNORM,
 129    BRW_SURFACEFORMAT_R8G8_UNORM,
 130    BRW_SURFACEFORMAT_R8G8B8_UNORM,
 131    BRW_SURFACEFORMAT_R8G8B8A8_UNORM
 132 };
 133
 134 static GLuint ubyte_types_scale[5] = {
 135    0,
 136    BRW_SURFACEFORMAT_R8_USCALED,
 137    BRW_SURFACEFORMAT_R8G8_USCALED,
 138    BRW_SURFACEFORMAT_R8G8B8_USCALED,
 139    BRW_SURFACEFORMAT_R8G8B8A8_USCALED
 140 };
 141
 142 static GLuint byte_types_norm[5] = {
 143    0,
 144    BRW_SURFACEFORMAT_R8_SNORM,
 145    BRW_SURFACEFORMAT_R8G8_SNORM,
 146    BRW_SURFACEFORMAT_R8G8B8_SNORM,
 147    BRW_SURFACEFORMAT_R8G8B8A8_SNORM
 148 };
 149
 150 static GLuint byte_types_scale[5] = {
 151    0,
 152    BRW_SURFACEFORMAT_R8_SSCALED,
 153    BRW_SURFACEFORMAT_R8G8_SSCALED,
 154    BRW_SURFACEFORMAT_R8G8B8_SSCALED,
 155    BRW_SURFACEFORMAT_R8G8B8A8_SSCALED
 156 };
 157
 158
 159 /**
 160  * Given vertex array type/size/format/normalized info, return
 161  * the appopriate hardware surface type.
 162  * Format will be GL_RGBA or possibly GL_BGRA for GLubyte[4] color arrays.
 163  */
 164 static GLuint get_surface_type( GLenum type, GLuint size,
 165                                 GLenum format, GLboolean normalized )
 166 {
 167    if (INTEL_DEBUG & DEBUG_VERTS)
 168       _mesa_printf("type %s size %d normalized %d\n",
 169                    _mesa_lookup_enum_by_nr(type), size, normalized);
 170
 171    if (normalized) {
 172       switch (type) {
 173       case GL_DOUBLE: return double_types[size];
 174       case GL_FLOAT: return float_types[size];
 175       case GL_INT: return int_types_norm[size];
 176       case GL_SHORT: return short_types_norm[size];
 177       case GL_BYTE: return byte_types_norm[size];
 178       case GL_UNSIGNED_INT: return uint_types_norm[size];
 179       case GL_UNSIGNED_SHORT: return ushort_types_norm[size];
 180       case GL_UNSIGNED_BYTE:
 181          if (format == GL_BGRA) {
 182             /* See GL_EXT_vertex_array_bgra */
 183             assert(size == 4);
 184             return BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
 185          }
 186          else {
 187             return ubyte_types_norm[size];
 188          }
 189       default: assert(0); return 0;
 190       }
 191    }
 192    else {
 193       assert(format == GL_RGBA); /* sanity check */
 194       switch (type) {
 195       case GL_DOUBLE: return double_types[size];
 196       case GL_FLOAT: return float_types[size];
 197       case GL_INT: return int_types_scale[size];
 198       case GL_SHORT: return short_types_scale[size];
 199       case GL_BYTE: return byte_types_scale[size];
 200       case GL_UNSIGNED_INT: return uint_types_scale[size];
 201       case GL_UNSIGNED_SHORT: return ushort_types_scale[size];
 202       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size];
 203       default: assert(0); return 0;
 204       }
 205    }
 206 }
 207
 208
 209 static GLuint get_size( GLenum type )
 210 {
 211    switch (type) {
 212    case GL_DOUBLE: return sizeof(GLdouble);
 213    case GL_FLOAT: return sizeof(GLfloat);
 214    case GL_INT: return sizeof(GLint);
 215    case GL_SHORT: return sizeof(GLshort);
 216    case GL_BYTE: return sizeof(GLbyte);
 217    case GL_UNSIGNED_INT: return sizeof(GLuint);
 218    case GL_UNSIGNED_SHORT: return sizeof(GLushort);
 219    case GL_UNSIGNED_BYTE: return sizeof(GLubyte);
 220    default: return 0;
 221    }
 222 }
 223
 224 static GLuint get_index_type(GLenum type)
 225 {
 226    switch (type) {
 227    case GL_UNSIGNED_BYTE:  return BRW_INDEX_BYTE;
 228    case GL_UNSIGNED_SHORT: return BRW_INDEX_WORD;
 229    case GL_UNSIGNED_INT:   return BRW_INDEX_DWORD;
 230    default: assert(0); return 0;
 231    }
 232 }
 233
 234 static void wrap_buffers( struct brw_context *brw,
 235                           GLuint size )
 236 {
 237    if (size < BRW_UPLOAD_INIT_SIZE)
 238       size = BRW_UPLOAD_INIT_SIZE;
 239
 240    brw->vb.upload.offset = 0;
 241
 242    if (brw->vb.upload.bo != NULL)
 243       dri_bo_unreference(brw->vb.upload.bo);
 244    brw->vb.upload.bo = dri_bo_alloc(brw->intel.bufmgr, "temporary VBO",
 245                                     size, 1);
 246
 247    /* Set the internal VBO\ to no-backing-store.  We only use them as a
 248     * temporary within a brw_try_draw_prims while the lock is held.
 249     */
 250    /* DON'T DO THIS AS IF WE HAVE TO RE-ORG MEMORY WE NEED SOMEWHERE WITH
 251       FAKE TO PUSH THIS STUFF */
 252 //   if (!brw->intel.ttm)
 253 //      dri_bo_fake_disable_backing_store(brw->vb.upload.bo, NULL, NULL);
 254 }
 255
 256 static void get_space( struct brw_context *brw,
 257                        GLuint size,
 258                        dri_bo **bo_return,
 259                        GLuint *offset_return )
 260 {
 261    size = ALIGN(size, 64);
 262
 263    if (brw->vb.upload.bo == NULL ||
 264        brw->vb.upload.offset + size > brw->vb.upload.bo->size) {
 265       wrap_buffers(brw, size);
 266    }
 267
 268    assert(*bo_return == NULL);
 269    dri_bo_reference(brw->vb.upload.bo);
 270    *bo_return = brw->vb.upload.bo;
 271    *offset_return = brw->vb.upload.offset;
 272    brw->vb.upload.offset += size;
 273 }
 274
 275 static void
 276 copy_array_to_vbo_array( struct brw_context *brw,
 277                          struct brw_vertex_element *element,
 278                          GLuint dst_stride)
 279 {
 280    GLuint size = element->count * dst_stride;
 281
 282    get_space(brw, size, &element->bo, &element->offset);
 283
 284    if (element->glarray->StrideB == 0) {
 285       assert(element->count == 1);
 286       element->stride = 0;
 287    } else {
 288       element->stride = dst_stride;
 289    }
 290
 291    if (dst_stride == element->glarray->StrideB) {
 292       dri_bo_subdata(element->bo,
 293                      element->offset,
 294                      size,
 295                      element->glarray->Ptr);
 296    } else {
 297       void *data;
 298       char *dest;
 299       const unsigned char *src = element->glarray->Ptr;
 300       int i;
 301
 302       data = _mesa_malloc(dst_stride * element->count);
 303       dest = data;
 304       for (i = 0; i < element->count; i++) {
 305          memcpy(dest, src, dst_stride);
 306          src += element->glarray->StrideB;
 307          dest += dst_stride;
 308       }
 309
 310       dri_bo_subdata(element->bo,
 311                      element->offset,
 312                      size,
 313                      data);
 314       _mesa_free(data);
 315    }
 316 }
 317
 318 static void brw_prepare_vertices(struct brw_context *brw)
 319 {
 320    GLcontext *ctx = &brw->intel.ctx;
 321    struct intel_context *intel = intel_context(ctx);
 322    GLuint tmp = brw->vs.prog_data->inputs_read;
 323    GLuint i;
 324    const unsigned char *ptr = NULL;
 325    GLuint interleave = 0;
 326    unsigned int min_index = brw->vb.min_index;
 327    unsigned int max_index = brw->vb.max_index;
 328
 329    struct brw_vertex_element *enabled[VERT_ATTRIB_MAX];
 330    GLuint nr_enabled = 0;
 331
 332    struct brw_vertex_element *upload[VERT_ATTRIB_MAX];
 333    GLuint nr_uploads = 0;
 334
 335    /* First build an array of pointers to ve's in vb.inputs_read
 336     */
 337    if (0)
 338       _mesa_printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
 339
 340    /* Accumulate the list of enabled arrays. */
 341    while (tmp) {
 342       GLuint i = _mesa_ffsll(tmp)-1;
 343       struct brw_vertex_element *input = &brw->vb.inputs[i];
 344
 345       tmp &= ~(1<<i);
 346       enabled[nr_enabled++] = input;
 347    }
 348
 349    /* XXX: In the rare cases where this happens we fallback all
 350     * the way to software rasterization, although a tnl fallback
 351     * would be sufficient.  I don't know of *any* real world
 352     * cases with > 17 vertex attributes enabled, so it probably
 353     * isn't an issue at this point.
 354     */
 355    if (nr_enabled >= BRW_VEP_MAX) {
 356       intel->Fallback = 1;
 357       return;
 358    }
 359
 360    for (i = 0; i < nr_enabled; i++) {
 361       struct brw_vertex_element *input = enabled[i];
 362
 363       input->element_size = get_size(input->glarray->Type) * input->glarray->Size;
 364       input->count = input->glarray->StrideB ? max_index + 1 - min_index : 1;
 365
 366       if (input->glarray->BufferObj->Name != 0) {
 367          struct intel_buffer_object *intel_buffer =
 368             intel_buffer_object(input->glarray->BufferObj);
 369
 370          /* Named buffer object: Just reference its contents directly. */
 371          dri_bo_unreference(input->bo);
 372          input->bo = intel_bufferobj_buffer(intel, intel_buffer,
 373                                             INTEL_READ);
 374          dri_bo_reference(input->bo);
 375          input->offset = (unsigned long)input->glarray->Ptr;
 376          input->stride = input->glarray->StrideB;
 377       } else {
 378          if (input->bo != NULL) {
 379             /* Already-uploaded vertex data is present from a previous
 380              * prepare_vertices, but we had to re-validate state due to
 381              * check_aperture failing and a new batch being produced.
 382              */
 383             continue;
 384          }
 385
 386          /* Queue the buffer object up to be uploaded in the next pass,
 387           * when we've decided if we're doing interleaved or not.
 388           */
 389          if (i == 0) {
 390             /* Position array not properly enabled:
 391              */
 392             if (input->glarray->StrideB == 0) {
 393                intel->Fallback = 1;
 394                return;
 395             }
 396
 397             interleave = input->glarray->StrideB;
 398             ptr = input->glarray->Ptr;
 399          }
 400          else if (interleave != input->glarray->StrideB ||
 401                   (const unsigned char *)input->glarray->Ptr - ptr < 0 ||
 402                   (const unsigned char *)input->glarray->Ptr - ptr > interleave)
 403          {
 404             interleave = 0;
 405          }
 406
 407          upload[nr_uploads++] = input;
 408
 409          /* We rebase drawing to start at element zero only when
 410           * varyings are not in vbos, which means we can end up
 411           * uploading non-varying arrays (stride != 0) when min_index
 412           * is zero.  This doesn't matter as the amount to upload is
 413           * the same for these arrays whether the draw call is rebased
 414           * or not - we just have to upload the one element.
 415           */
 416          assert(min_index == 0 || input->glarray->StrideB == 0);
 417       }
 418    }
 419
 420    /* Handle any arrays to be uploaded. */
 421    if (nr_uploads > 1 && interleave && interleave <= 256) {
 422       /* All uploads are interleaved, so upload the arrays together as
 423        * interleaved.  First, upload the contents and set up upload[0].
 424        */
 425       copy_array_to_vbo_array(brw, upload[0], interleave);
 426
 427       for (i = 1; i < nr_uploads; i++) {
 428          /* Then, just point upload[i] at upload[0]'s buffer. */
 429          upload[i]->stride = interleave;
 430          upload[i]->offset = upload[0]->offset +
 431             ((const unsigned char *)upload[i]->glarray->Ptr - ptr);
 432          upload[i]->bo = upload[0]->bo;
 433          dri_bo_reference(upload[i]->bo);
 434       }
 435    }
 436    else {
 437       /* Upload non-interleaved arrays */
 438       for (i = 0; i < nr_uploads; i++) {
 439           copy_array_to_vbo_array(brw, upload[i], upload[i]->element_size);
 440       }
 441    }
 442
 443    brw_prepare_query_begin(brw);
 444
 445    for (i = 0; i < nr_enabled; i++) {
 446       struct brw_vertex_element *input = enabled[i];
 447
 448       brw_add_validated_bo(brw, input->bo);
 449    }
 450 }
 451
 452 static void brw_emit_vertices(struct brw_context *brw)
 453 {
 454    GLcontext *ctx = &brw->intel.ctx;
 455    struct intel_context *intel = intel_context(ctx);
 456    GLuint tmp = brw->vs.prog_data->inputs_read;
 457    struct brw_vertex_element *enabled[VERT_ATTRIB_MAX];
 458    GLuint i;
 459    GLuint nr_enabled = 0;
 460
 461   /* Accumulate the list of enabled arrays. */
 462    while (tmp) {
 463       i = _mesa_ffsll(tmp)-1;
 464       struct brw_vertex_element *input = &brw->vb.inputs[i];
 465
 466       tmp &= ~(1<<i);
 467       enabled[nr_enabled++] = input;
 468    }
 469
 470    brw_emit_query_begin(brw);
 471
 472    /* Now emit VB and VEP state packets.
 473     *
 474     * This still defines a hardware VB for each input, even if they
 475     * are interleaved or from the same VBO.  TBD if this makes a
 476     * performance difference.
 477     */
 478    BEGIN_BATCH(1 + nr_enabled * 4, IGNORE_CLIPRECTS);
 479    OUT_BATCH((CMD_VERTEX_BUFFER << 16) |
 480              ((1 + nr_enabled * 4) - 2));
 481
 482    for (i = 0; i < nr_enabled; i++) {
 483       struct brw_vertex_element *input = enabled[i];
 484
 485       OUT_BATCH((i << BRW_VB0_INDEX_SHIFT) |
 486                 BRW_VB0_ACCESS_VERTEXDATA |
 487                 (input->stride << BRW_VB0_PITCH_SHIFT));
 488       OUT_RELOC(input->bo,
 489                 I915_GEM_DOMAIN_VERTEX, 0,
 490                 input->offset);
 491       OUT_BATCH(brw->vb.max_index);
 492       OUT_BATCH(0); /* Instance data step rate */
 493    }
 494    ADVANCE_BATCH();
 495
 496    BEGIN_BATCH(1 + nr_enabled * 2, IGNORE_CLIPRECTS);
 497    OUT_BATCH((CMD_VERTEX_ELEMENT << 16) | ((1 + nr_enabled * 2) - 2));
 498    for (i = 0; i < nr_enabled; i++) {
 499       struct brw_vertex_element *input = enabled[i];
 500       uint32_t format = get_surface_type(input->glarray->Type,
 501                                          input->glarray->Size,
 502                                          input->glarray->Format,
 503                                          input->glarray->Normalized);
 504       uint32_t comp0 = BRW_VE1_COMPONENT_STORE_SRC;
 505       uint32_t comp1 = BRW_VE1_COMPONENT_STORE_SRC;
 506       uint32_t comp2 = BRW_VE1_COMPONENT_STORE_SRC;
 507       uint32_t comp3 = BRW_VE1_COMPONENT_STORE_SRC;
 508
 509       switch (input->glarray->Size) {
 510       case 0: comp0 = BRW_VE1_COMPONENT_STORE_0;
 511       case 1: comp1 = BRW_VE1_COMPONENT_STORE_0;
 512       case 2: comp2 = BRW_VE1_COMPONENT_STORE_0;
 513       case 3: comp3 = BRW_VE1_COMPONENT_STORE_1_FLT;
 514          break;
 515       }
 516
 517       OUT_BATCH((i << BRW_VE0_INDEX_SHIFT) |
 518                 BRW_VE0_VALID |
 519                 (format << BRW_VE0_FORMAT_SHIFT) |
 520                 (0 << BRW_VE0_SRC_OFFSET_SHIFT));
 521       OUT_BATCH((comp0 << BRW_VE1_COMPONENT_0_SHIFT) |
 522                 (comp1 << BRW_VE1_COMPONENT_1_SHIFT) |
 523                 (comp2 << BRW_VE1_COMPONENT_2_SHIFT) |
 524                 (comp3 << BRW_VE1_COMPONENT_3_SHIFT) |
 525                 ((i * 4) << BRW_VE1_DST_OFFSET_SHIFT));
 526    }
 527    ADVANCE_BATCH();
 528 }
 529
 530 const struct brw_tracked_state brw_vertices = {
 531    .dirty = {
 532       .mesa = 0,
 533       .brw = BRW_NEW_BATCH | BRW_NEW_VERTICES,
 534       .cache = 0,
 535    },
 536    .prepare = brw_prepare_vertices,
 537    .emit = brw_emit_vertices,
 538 };
 539
 540 static void brw_prepare_indices(struct brw_context *brw)
 541 {
 542    GLcontext *ctx = &brw->intel.ctx;
 543    struct intel_context *intel = &brw->intel;
 544    const struct _mesa_index_buffer *index_buffer = brw->ib.ib;
 545    GLuint ib_size;
 546    dri_bo *bo = NULL;
 547    struct gl_buffer_object *bufferobj;
 548    GLuint offset;
 549
 550    if (index_buffer == NULL)
 551       return;
 552
 553    ib_size = get_size(index_buffer->type) * index_buffer->count;
 554    bufferobj = index_buffer->obj;;
 555
 556    /* Turn into a proper VBO:
 557     */
 558    if (!bufferobj->Name) {
 559
 560       /* Get new bufferobj, offset:
 561        */
 562       get_space(brw, ib_size, &bo, &offset);
 563
 564       /* Straight upload
 565        */
 566       dri_bo_subdata(bo, offset, ib_size, index_buffer->ptr);
 567    } else {
 568       offset = (GLuint) (unsigned long) index_buffer->ptr;
 569
 570       /* If the index buffer isn't aligned to its element size, we have to
 571        * rebase it into a temporary.
 572        */
 573        if ((get_size(index_buffer->type) - 1) & offset) {
 574            GLubyte *map = ctx->Driver.MapBuffer(ctx,
 575                                                 GL_ELEMENT_ARRAY_BUFFER_ARB,
 576                                                 GL_DYNAMIC_DRAW_ARB,
 577                                                 bufferobj);
 578            map += offset;
 579
 580            get_space(brw, ib_size, &bo, &offset);
 581
 582            dri_bo_subdata(bo, offset, ib_size, map);
 583
 584            ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobj);
 585        } else {
 586           bo = intel_bufferobj_buffer(intel, intel_buffer_object(bufferobj),
 587                                       INTEL_READ);
 588           dri_bo_reference(bo);
 589        }
 590    }
 591
 592    dri_bo_unreference(brw->ib.bo);
 593    brw->ib.bo = bo;
 594    brw->ib.offset = offset;
 595
 596    brw_add_validated_bo(brw, brw->ib.bo);
 597 }
 598
 599 static void brw_emit_indices(struct brw_context *brw)
 600 {
 601    struct intel_context *intel = &brw->intel;
 602    const struct _mesa_index_buffer *index_buffer = brw->ib.ib;
 603    GLuint ib_size;
 604
 605    if (index_buffer == NULL)
 606       return;
 607
 608    ib_size = get_size(index_buffer->type) * index_buffer->count;
 609
 610    /* Emit the indexbuffer packet:
 611     */
 612    {
 613       struct brw_indexbuffer ib;
 614
 615       memset(&ib, 0, sizeof(ib));
 616
 617       ib.header.bits.opcode = CMD_INDEX_BUFFER;
 618       ib.header.bits.length = sizeof(ib)/4 - 2;
 619       ib.header.bits.index_format = get_index_type(index_buffer->type);
 620       ib.header.bits.cut_index_enable = 0;
 621
 622
 623       BEGIN_BATCH(4, IGNORE_CLIPRECTS);
 624       OUT_BATCH( ib.header.dword );
 625       OUT_RELOC(brw->ib.bo,
 626                 I915_GEM_DOMAIN_VERTEX, 0,
 627                 brw->ib.offset);
 628       OUT_RELOC(brw->ib.bo,
 629                 I915_GEM_DOMAIN_VERTEX, 0,
 630                 brw->ib.offset + ib_size);
 631       OUT_BATCH( 0 );
 632       ADVANCE_BATCH();
 633    }
 634 }
 635
 636 const struct brw_tracked_state brw_indices = {
 637    .dirty = {
 638       .mesa = 0,
 639       .brw = BRW_NEW_BATCH | BRW_NEW_INDICES,
 640       .cache = 0,
 641    },
 642    .prepare = brw_prepare_indices,
 643    .emit = brw_emit_indices,
 644 };