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_attrib.h"
  39 #include "brw_context.h"
  40 #include "brw_aub.h"
  41 #include "brw_state.h"
  42 #include "brw_fallback.h"
  43
  44 #include "intel_ioctl.h"
  45 #include "intel_batchbuffer.h"
  46 #include "intel_buffer_objects.h"
  47
  48
  49 struct brw_array_state {
  50    union header_union header;
  51
  52    struct {
  53       union {
  54          struct {
  55             GLuint pitch:11;
  56             GLuint pad:15;
  57             GLuint access_type:1;
  58             GLuint vb_index:5;
  59          } bits;
  60          GLuint dword;
  61       } vb0;
  62
  63       struct buffer *buffer;
  64       GLuint offset;
  65
  66       GLuint max_index;
  67       GLuint instance_data_step_rate;
  68
  69    } vb[BRW_VBP_MAX];
  70 };
  71
  72
  73 static struct buffer *array_buffer( const struct gl_client_array *array )
  74 {
  75    return intel_bufferobj_buffer(intel_buffer_object(array->BufferObj));
  76 }
  77
  78 static GLuint double_types[5] = {
  79    0,
  80    BRW_SURFACEFORMAT_R64_FLOAT,
  81    BRW_SURFACEFORMAT_R64G64_FLOAT,
  82    BRW_SURFACEFORMAT_R64G64B64_FLOAT,
  83    BRW_SURFACEFORMAT_R64G64B64A64_FLOAT
  84 };
  85
  86 static GLuint float_types[5] = {
  87    0,
  88    BRW_SURFACEFORMAT_R32_FLOAT,
  89    BRW_SURFACEFORMAT_R32G32_FLOAT,
  90    BRW_SURFACEFORMAT_R32G32B32_FLOAT,
  91    BRW_SURFACEFORMAT_R32G32B32A32_FLOAT
  92 };
  93
  94 static GLuint uint_types_norm[5] = {
  95    0,
  96    BRW_SURFACEFORMAT_R32_UNORM,
  97    BRW_SURFACEFORMAT_R32G32_UNORM,
  98    BRW_SURFACEFORMAT_R32G32B32_UNORM,
  99    BRW_SURFACEFORMAT_R32G32B32A32_UNORM
 100 };
 101
 102 static GLuint uint_types_scale[5] = {
 103    0,
 104    BRW_SURFACEFORMAT_R32_USCALED,
 105    BRW_SURFACEFORMAT_R32G32_USCALED,
 106    BRW_SURFACEFORMAT_R32G32B32_USCALED,
 107    BRW_SURFACEFORMAT_R32G32B32A32_USCALED
 108 };
 109
 110 static GLuint int_types_norm[5] = {
 111    0,
 112    BRW_SURFACEFORMAT_R32_SNORM,
 113    BRW_SURFACEFORMAT_R32G32_SNORM,
 114    BRW_SURFACEFORMAT_R32G32B32_SNORM,
 115    BRW_SURFACEFORMAT_R32G32B32A32_SNORM
 116 };
 117
 118 static GLuint int_types_scale[5] = {
 119    0,
 120    BRW_SURFACEFORMAT_R32_SSCALED,
 121    BRW_SURFACEFORMAT_R32G32_SSCALED,
 122    BRW_SURFACEFORMAT_R32G32B32_SSCALED,
 123    BRW_SURFACEFORMAT_R32G32B32A32_SSCALED
 124 };
 125
 126 static GLuint ushort_types_norm[5] = {
 127    0,
 128    BRW_SURFACEFORMAT_R16_UNORM,
 129    BRW_SURFACEFORMAT_R16G16_UNORM,
 130    BRW_SURFACEFORMAT_R16G16B16_UNORM,
 131    BRW_SURFACEFORMAT_R16G16B16A16_UNORM
 132 };
 133
 134 static GLuint ushort_types_scale[5] = {
 135    0,
 136    BRW_SURFACEFORMAT_R16_USCALED,
 137    BRW_SURFACEFORMAT_R16G16_USCALED,
 138    BRW_SURFACEFORMAT_R16G16B16_USCALED,
 139    BRW_SURFACEFORMAT_R16G16B16A16_USCALED
 140 };
 141
 142 static GLuint short_types_norm[5] = {
 143    0,
 144    BRW_SURFACEFORMAT_R16_SNORM,
 145    BRW_SURFACEFORMAT_R16G16_SNORM,
 146    BRW_SURFACEFORMAT_R16G16B16_SNORM,
 147    BRW_SURFACEFORMAT_R16G16B16A16_SNORM
 148 };
 149
 150 static GLuint short_types_scale[5] = {
 151    0,
 152    BRW_SURFACEFORMAT_R16_SSCALED,
 153    BRW_SURFACEFORMAT_R16G16_SSCALED,
 154    BRW_SURFACEFORMAT_R16G16B16_SSCALED,
 155    BRW_SURFACEFORMAT_R16G16B16A16_SSCALED
 156 };
 157
 158 static GLuint ubyte_types_norm[5] = {
 159    0,
 160    BRW_SURFACEFORMAT_R8_UNORM,
 161    BRW_SURFACEFORMAT_R8G8_UNORM,
 162    BRW_SURFACEFORMAT_R8G8B8_UNORM,
 163    BRW_SURFACEFORMAT_R8G8B8A8_UNORM
 164 };
 165
 166 static GLuint ubyte_types_scale[5] = {
 167    0,
 168    BRW_SURFACEFORMAT_R8_USCALED,
 169    BRW_SURFACEFORMAT_R8G8_USCALED,
 170    BRW_SURFACEFORMAT_R8G8B8_USCALED,
 171    BRW_SURFACEFORMAT_R8G8B8A8_USCALED
 172 };
 173
 174 static GLuint byte_types_norm[5] = {
 175    0,
 176    BRW_SURFACEFORMAT_R8_SNORM,
 177    BRW_SURFACEFORMAT_R8G8_SNORM,
 178    BRW_SURFACEFORMAT_R8G8B8_SNORM,
 179    BRW_SURFACEFORMAT_R8G8B8A8_SNORM
 180 };
 181
 182 static GLuint byte_types_scale[5] = {
 183    0,
 184    BRW_SURFACEFORMAT_R8_SSCALED,
 185    BRW_SURFACEFORMAT_R8G8_SSCALED,
 186    BRW_SURFACEFORMAT_R8G8B8_SSCALED,
 187    BRW_SURFACEFORMAT_R8G8B8A8_SSCALED
 188 };
 189
 190
 191 static GLuint get_surface_type( GLenum type, GLuint size, GLboolean normalized )
 192 {
 193    if (INTEL_DEBUG & DEBUG_VERTS)
 194       _mesa_printf("type %s size %d normalized %d\n",
 195                    _mesa_lookup_enum_by_nr(type), size, normalized);
 196
 197    if (normalized) {
 198       switch (type) {
 199       case GL_DOUBLE: return double_types[size];
 200       case GL_FLOAT: return float_types[size];
 201       case GL_INT: return int_types_norm[size];
 202       case GL_SHORT: return short_types_norm[size];
 203       case GL_BYTE: return byte_types_norm[size];
 204       case GL_UNSIGNED_INT: return uint_types_norm[size];
 205       case GL_UNSIGNED_SHORT: return ushort_types_norm[size];
 206       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size];
 207       default: assert(0); return 0;
 208       }
 209    }
 210    else {
 211       switch (type) {
 212       case GL_DOUBLE: return double_types[size];
 213       case GL_FLOAT: return float_types[size];
 214       case GL_INT: return int_types_scale[size];
 215       case GL_SHORT: return short_types_scale[size];
 216       case GL_BYTE: return byte_types_scale[size];
 217       case GL_UNSIGNED_INT: return uint_types_scale[size];
 218       case GL_UNSIGNED_SHORT: return ushort_types_scale[size];
 219       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size];
 220       default: assert(0); return 0;
 221       }
 222    }
 223 }
 224
 225
 226 static GLuint get_size( GLenum type )
 227 {
 228    switch (type) {
 229    case GL_DOUBLE: return sizeof(GLdouble);
 230    case GL_FLOAT: return sizeof(GLfloat);
 231    case GL_INT: return sizeof(GLint);
 232    case GL_SHORT: return sizeof(GLshort);
 233    case GL_BYTE: return sizeof(GLbyte);
 234    case GL_UNSIGNED_INT: return sizeof(GLuint);
 235    case GL_UNSIGNED_SHORT: return sizeof(GLushort);
 236    case GL_UNSIGNED_BYTE: return sizeof(GLubyte);
 237    default: return 0;
 238    }
 239 }
 240
 241 static GLuint get_index_type(GLenum type)
 242 {
 243    switch (type) {
 244    case GL_UNSIGNED_BYTE:  return BRW_INDEX_BYTE;
 245    case GL_UNSIGNED_SHORT: return BRW_INDEX_WORD;
 246    case GL_UNSIGNED_INT:   return BRW_INDEX_DWORD;
 247    default: assert(0); return 0;
 248    }
 249 }
 250
 251 static void copy_strided_array( GLubyte *dest,
 252                                 const GLubyte *src,
 253                                 GLuint size,
 254                                 GLuint stride,
 255                                 GLuint count )
 256 {
 257    if (size == stride)
 258       do_memcpy(dest, src, count * size);
 259    else {
 260       GLuint i,j;
 261
 262       for (i = 0; i < count; i++) {
 263          for (j = 0; j < size; j++)
 264             *dest++ = *src++;
 265          src += (stride - size);
 266       }
 267    }
 268 }
 269
 270 static void wrap_buffers( struct brw_context *brw,
 271                           GLuint size )
 272 {
 273    GLcontext *ctx = &brw->intel.ctx;
 274
 275    if (size < BRW_UPLOAD_INIT_SIZE)
 276       size = BRW_UPLOAD_INIT_SIZE;
 277
 278    brw->vb.upload.buf++;
 279    brw->vb.upload.buf %= BRW_NR_UPLOAD_BUFS;
 280    brw->vb.upload.offset = 0;
 281
 282    ctx->Driver.BufferData(ctx,
 283                           GL_ARRAY_BUFFER_ARB,
 284                           size,
 285                           NULL,
 286                           GL_DYNAMIC_DRAW_ARB,
 287                           brw->vb.upload.vbo[brw->vb.upload.buf]);
 288 }
 289
 290 static void get_space( struct brw_context *brw,
 291                        GLuint size,
 292                        struct gl_buffer_object **vbo_return,
 293                        GLuint *offset_return )
 294 {
 295    size = (size + 63) & ~63;
 296
 297    if (brw->vb.upload.offset + size > BRW_UPLOAD_INIT_SIZE)
 298       wrap_buffers(brw, size);
 299
 300    *vbo_return = brw->vb.upload.vbo[brw->vb.upload.buf];
 301    *offset_return = brw->vb.upload.offset;
 302
 303    brw->vb.upload.offset += size;
 304 }
 305
 306
 307
 308 static struct gl_client_array *
 309 copy_array_to_vbo_array( struct brw_context *brw,
 310                          GLuint i,
 311                          const struct gl_client_array *array,
 312                          GLuint element_size,
 313                          GLuint min_index,
 314                          GLuint count)
 315 {
 316    GLcontext *ctx = &brw->intel.ctx;
 317    struct gl_client_array *vbo_array = &brw->vb.vbo_array[i];
 318    GLuint size = count * element_size;
 319    struct gl_buffer_object *vbo;
 320    GLuint offset;
 321    GLuint new_stride;
 322
 323    get_space(brw, size, &vbo, &offset);
 324
 325    if (array->StrideB == 0) {
 326       assert(count == 1);
 327       new_stride = 0;
 328    }
 329    else
 330       new_stride = element_size;
 331
 332    vbo_array->Size = array->Size;
 333    vbo_array->Type = array->Type;
 334    vbo_array->Stride = new_stride;
 335    vbo_array->StrideB = new_stride;
 336    vbo_array->Ptr = (const void *)offset;
 337    vbo_array->Enabled = 1;
 338    vbo_array->Normalized = array->Normalized;
 339    vbo_array->_MaxElement = array->_MaxElement; /* ? */
 340    vbo_array->Flags = array->Flags; /* ? */
 341    vbo_array->BufferObj = vbo;
 342
 343    {
 344       GLubyte *map = ctx->Driver.MapBuffer(ctx,
 345                                            GL_ARRAY_BUFFER_ARB,
 346                                            GL_DYNAMIC_DRAW_ARB,
 347                                            vbo);
 348
 349       map += offset;
 350
 351       copy_strided_array( map,
 352                           array->Ptr + min_index * array->StrideB,
 353                           element_size,
 354                           array->StrideB,
 355                           count);
 356
 357       ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, vbo_array->BufferObj);
 358    }
 359
 360    return vbo_array;
 361 }
 362
 363
 364
 365 static struct gl_client_array *
 366 interleaved_vbo_array( struct brw_context *brw,
 367                        GLuint i,
 368                        const struct gl_client_array *uploaded_array,
 369                        const struct gl_client_array *array,
 370                        const char *ptr)
 371 {
 372    struct gl_client_array *vbo_array = &brw->vb.vbo_array[i];
 373
 374    vbo_array->Size = array->Size;
 375    vbo_array->Type = array->Type;
 376    vbo_array->Stride = array->Stride;
 377    vbo_array->StrideB = array->StrideB;
 378    vbo_array->Ptr = (const void *)((const char *)uploaded_array->Ptr +
 379                                    ((const char *)array->Ptr - ptr));
 380    vbo_array->Enabled = 1;
 381    vbo_array->Normalized = array->Normalized;
 382    vbo_array->_MaxElement = array->_MaxElement;
 383    vbo_array->Flags = array->Flags; /* ? */
 384    vbo_array->BufferObj = uploaded_array->BufferObj;
 385
 386    return vbo_array;
 387 }
 388
 389
 390 GLboolean brw_upload_vertices( struct brw_context *brw,
 391                                GLuint min_index,
 392                                GLuint max_index )
 393 {
 394    GLcontext *ctx = &brw->intel.ctx;
 395    struct intel_context *intel = intel_context(ctx);
 396    GLuint tmp = brw->vs.prog_data->inputs_read;
 397    struct brw_vertex_element_packet vep;
 398    struct brw_array_state vbp;
 399    GLuint i;
 400    const void *ptr = NULL;
 401    GLuint interleave = 0;
 402
 403    struct brw_vertex_element *enabled[BRW_ATTRIB_MAX];
 404    GLuint nr_enabled = 0;
 405
 406    struct brw_vertex_element *upload[BRW_ATTRIB_MAX];
 407    GLuint nr_uploads = 0;
 408
 409
 410    memset(&vbp, 0, sizeof(vbp));
 411    memset(&vep, 0, sizeof(vep));
 412
 413    /* First build an array of pointers to ve's in vb.inputs_read
 414     */
 415
 416    while (tmp) {
 417       GLuint i = ffs(tmp)-1;
 418       struct brw_vertex_element *input = &brw->vb.inputs[i];
 419
 420       tmp &= ~(1<<i);
 421       enabled[nr_enabled++] = input;
 422
 423       input->index = i;
 424       input->element_size = get_size(input->glarray->Type) * input->glarray->Size;
 425       input->count = input->glarray->StrideB ? max_index - min_index : 1;
 426
 427       if (!input->glarray->BufferObj->Name) {
 428          if (i == 0) {
 429             /* Position array not properly enabled:
 430              */
 431             if (input->glarray->StrideB == 0)
 432                return GL_FALSE;
 433
 434             interleave = input->glarray->StrideB;
 435             ptr = input->glarray->Ptr;
 436          }
 437          else if (interleave != input->glarray->StrideB ||
 438                   (const char *)input->glarray->Ptr - (const char *)ptr < 0 ||
 439                   (const char *)input->glarray->Ptr - (const char *)ptr > interleave) {
 440             interleave = 0;
 441          }
 442
 443          upload[nr_uploads++] = input;
 444          input->vbo_rebase_offset = 0;
 445       }
 446       else
 447          input->vbo_rebase_offset = min_index * input->glarray->StrideB;
 448    }
 449
 450    /* Upload interleaved arrays if all uploads are interleaved
 451     */
 452    if (nr_uploads > 1 &&
 453        interleave &&
 454        interleave <= 256) {
 455       struct brw_vertex_element *input0 = upload[0];
 456
 457       input0->glarray = copy_array_to_vbo_array(brw, 0,
 458                                                 input0->glarray,
 459                                                 interleave,
 460                                                 min_index,
 461                                                 input0->count);
 462
 463       for (i = 1; i < nr_uploads; i++) {
 464          upload[i]->glarray = interleaved_vbo_array(brw,
 465                                                     i,
 466                                                     input0->glarray,
 467                                                     upload[i]->glarray,
 468                                                     ptr);
 469       }
 470    }
 471    else {
 472       for (i = 0; i < nr_uploads; i++) {
 473          struct brw_vertex_element *input = upload[i];
 474
 475          input->glarray = copy_array_to_vbo_array(brw, i,
 476                                                   input->glarray,
 477                                                   input->element_size,
 478                                                   min_index,
 479                                                   input->count);
 480
 481       }
 482    }
 483
 484    /* XXX: In the rare cases where this happens we fallback all
 485     * the way to software rasterization, although a tnl fallback
 486     * would be sufficient.  I don't know of *any* real world
 487     * cases with > 17 vertex attributes enabled, so it probably
 488     * isn't an issue at this point.
 489     */
 490    if (nr_enabled >= BRW_VEP_MAX)
 491          return GL_FALSE;
 492
 493    /* This still defines a hardware VB for each input, even if they
 494     * are interleaved or from the same VBO.  TBD if this makes a
 495     * performance difference.
 496     */
 497    for (i = 0; i < nr_enabled; i++) {
 498       struct brw_vertex_element *input = enabled[i];
 499
 500       input->vep = &vep.ve[i];
 501       input->vep->ve0.src_format = get_surface_type(input->glarray->Type,
 502                                                     input->glarray->Size,
 503                                                     input->glarray->Normalized);
 504       input->vep->ve0.valid = 1;
 505       input->vep->ve1.dst_offset = (i) * 4;
 506       input->vep->ve1.vfcomponent3 = BRW_VFCOMPONENT_STORE_SRC;
 507       input->vep->ve1.vfcomponent2 = BRW_VFCOMPONENT_STORE_SRC;
 508       input->vep->ve1.vfcomponent1 = BRW_VFCOMPONENT_STORE_SRC;
 509       input->vep->ve1.vfcomponent0 = BRW_VFCOMPONENT_STORE_SRC;
 510
 511       switch (input->glarray->Size) {
 512       case 0: input->vep->ve1.vfcomponent0 = BRW_VFCOMPONENT_STORE_0;
 513       case 1: input->vep->ve1.vfcomponent1 = BRW_VFCOMPONENT_STORE_0;
 514       case 2: input->vep->ve1.vfcomponent2 = BRW_VFCOMPONENT_STORE_0;
 515       case 3: input->vep->ve1.vfcomponent3 = BRW_VFCOMPONENT_STORE_1_FLT;
 516          break;
 517       }
 518
 519       input->vep->ve0.vertex_buffer_index = i;
 520       input->vep->ve0.src_offset = 0;
 521
 522       vbp.vb[i].vb0.bits.pitch = input->glarray->StrideB;
 523       vbp.vb[i].vb0.bits.pad = 0;
 524       vbp.vb[i].vb0.bits.access_type = BRW_VERTEXBUFFER_ACCESS_VERTEXDATA;
 525       vbp.vb[i].vb0.bits.vb_index = i;
 526       vbp.vb[i].offset = (GLuint)input->glarray->Ptr + input->vbo_rebase_offset;
 527       vbp.vb[i].buffer = array_buffer(input->glarray);
 528       vbp.vb[i].max_index = max_index - min_index;
 529    }
 530
 531
 532
 533    /* Now emit VB and VEP state packets:
 534     */
 535    vbp.header.bits.length = (1 + nr_enabled * 4) - 2;
 536    vbp.header.bits.opcode = CMD_VERTEX_BUFFER;
 537
 538    BEGIN_BATCH(vbp.header.bits.length+2, 0);
 539    OUT_BATCH( vbp.header.dword );
 540
 541    for (i = 0; i < nr_enabled; i++) {
 542       OUT_BATCH( vbp.vb[i].vb0.dword );
 543       OUT_BATCH( bmBufferOffset(&brw->intel, vbp.vb[i].buffer) + vbp.vb[i].offset);
 544       OUT_BATCH( vbp.vb[i].max_index );
 545       OUT_BATCH( vbp.vb[i].instance_data_step_rate );
 546    }
 547    ADVANCE_BATCH();
 548
 549    vep.header.length = (1 + nr_enabled * sizeof(vep.ve[0])/4) - 2;
 550    vep.header.opcode = CMD_VERTEX_ELEMENT;
 551    brw_cached_batch_struct(brw, &vep, 4 + nr_enabled * sizeof(vep.ve[0]));
 552
 553    return GL_TRUE;
 554 }
 555
 556
 557 static GLuint element_size( GLenum type )
 558 {
 559    switch(type) {
 560    case GL_UNSIGNED_INT: return 4;
 561    case GL_UNSIGNED_SHORT: return 2;
 562    case GL_UNSIGNED_BYTE: return 1;
 563    default: assert(0); return 0;
 564    }
 565 }
 566
 567
 568
 569
 570 static void rebase_indices_to_vbo_indices( struct brw_context *brw,
 571                                            const struct brw_draw_index_buffer *index_buffer,
 572                                            struct gl_buffer_object **vbo_return,
 573                                            GLuint *offset_return )
 574 {
 575    GLcontext *ctx = &brw->intel.ctx;
 576    GLuint min_index = index_buffer->rebase;
 577    const void *indices = index_buffer->ptr;
 578    GLsizei count = index_buffer->count;
 579    GLenum type = index_buffer->type;
 580    GLuint size = element_size(type) * count;
 581    struct gl_buffer_object *bufferobj;
 582    GLuint offset;
 583    GLuint i;
 584
 585    get_space(brw, size, &bufferobj, &offset);
 586
 587    *vbo_return = bufferobj;
 588    *offset_return = offset;
 589
 590    if (min_index == 0) {
 591       /* Straight upload
 592        */
 593       ctx->Driver.BufferSubData( ctx,
 594                                  GL_ELEMENT_ARRAY_BUFFER_ARB,
 595                                  offset,
 596                                  size,
 597                                  indices,
 598                                  bufferobj);
 599    }
 600    else {
 601       void *map = ctx->Driver.MapBuffer(ctx,
 602                                         GL_ELEMENT_ARRAY_BUFFER_ARB,
 603                                         GL_DYNAMIC_DRAW_ARB,
 604                                         bufferobj);
 605
 606       map += offset;
 607
 608       switch (type) {
 609       case GL_UNSIGNED_INT: {
 610          GLuint *ui_map = (GLuint *)map;
 611          const GLuint *ui_indices = (const GLuint *)indices;
 612
 613          for (i = 0; i < count; i++)
 614             ui_map[i] = ui_indices[i] - min_index;
 615          break;
 616       }
 617       case GL_UNSIGNED_SHORT:  {
 618          GLushort *us_map = (GLushort *)map;
 619          const GLushort *us_indices = (const GLushort *)indices;
 620
 621          for (i = 0; i < count; i++)
 622             us_map[i] = us_indices[i] - min_index;
 623          break;
 624       }
 625       case GL_UNSIGNED_BYTE:  {
 626          GLubyte *ub_map = (GLubyte *)map;
 627          const GLubyte *ub_indices = (const GLubyte *)indices;
 628
 629          for (i = 0; i < count; i++)
 630             ub_map[i] = ub_indices[i] - min_index;
 631          break;
 632       }
 633       }
 634
 635       ctx->Driver.UnmapBuffer(ctx,
 636                               GL_ELEMENT_ARRAY_BUFFER_ARB,
 637                               bufferobj);
 638
 639    }
 640 }
 641
 642
 643
 644 void brw_upload_indices( struct brw_context *brw,
 645                          const struct brw_draw_index_buffer *index_buffer)
 646 {
 647    struct intel_context *intel = &brw->intel;
 648    GLuint ib_size = get_size(index_buffer->type) * index_buffer->count;
 649    struct gl_buffer_object *bufferobj = index_buffer->obj;
 650    GLuint offset = (GLuint)index_buffer->ptr;
 651
 652    /* Already turned into a proper VBO:
 653     */
 654    if (!index_buffer->obj->Name) {
 655       rebase_indices_to_vbo_indices(brw, index_buffer, &bufferobj, &offset );
 656    }
 657
 658    /* Emit the indexbuffer packet:
 659     */
 660    {
 661       struct brw_indexbuffer ib;
 662       struct buffer *buffer = intel_bufferobj_buffer(intel_buffer_object(bufferobj));
 663
 664       memset(&ib, 0, sizeof(ib));
 665
 666       ib.header.bits.opcode = CMD_INDEX_BUFFER;
 667       ib.header.bits.length = sizeof(ib)/4 - 2;
 668       ib.header.bits.index_format = get_index_type(index_buffer->type);
 669       ib.header.bits.cut_index_enable = 0;
 670
 671
 672       BEGIN_BATCH(4, 0);
 673       OUT_BATCH( ib.header.dword );
 674       OUT_BATCH( bmBufferOffset(intel, buffer) + offset );
 675       OUT_BATCH( bmBufferOffset(intel, buffer) + offset + ib_size );
 676       OUT_BATCH( 0 );
 677       ADVANCE_BATCH();
 678    }
 679 }