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 #undef NDEBUG
  29
  30 #include "main/glheader.h"
  31 #include "main/bufferobj.h"
  32 #include "main/context.h"
  33 #include "main/enums.h"
  34
  35 #include "brw_draw.h"
  36 #include "brw_defines.h"
  37 #include "brw_context.h"
  38 #include "brw_state.h"
  39
  40 #include "intel_batchbuffer.h"
  41 #include "intel_buffer_objects.h"
  42
  43 static GLuint double_types[5] = {
  44    0,
  45    BRW_SURFACEFORMAT_R64_FLOAT,
  46    BRW_SURFACEFORMAT_R64G64_FLOAT,
  47    BRW_SURFACEFORMAT_R64G64B64_FLOAT,
  48    BRW_SURFACEFORMAT_R64G64B64A64_FLOAT
  49 };
  50
  51 static GLuint float_types[5] = {
  52    0,
  53    BRW_SURFACEFORMAT_R32_FLOAT,
  54    BRW_SURFACEFORMAT_R32G32_FLOAT,
  55    BRW_SURFACEFORMAT_R32G32B32_FLOAT,
  56    BRW_SURFACEFORMAT_R32G32B32A32_FLOAT
  57 };
  58
  59 static GLuint half_float_types[5] = {
  60    0,
  61    BRW_SURFACEFORMAT_R16_FLOAT,
  62    BRW_SURFACEFORMAT_R16G16_FLOAT,
  63    BRW_SURFACEFORMAT_R16G16B16A16_FLOAT,
  64    BRW_SURFACEFORMAT_R16G16B16A16_FLOAT
  65 };
  66
  67 static GLuint uint_types_norm[5] = {
  68    0,
  69    BRW_SURFACEFORMAT_R32_UNORM,
  70    BRW_SURFACEFORMAT_R32G32_UNORM,
  71    BRW_SURFACEFORMAT_R32G32B32_UNORM,
  72    BRW_SURFACEFORMAT_R32G32B32A32_UNORM
  73 };
  74
  75 static GLuint uint_types_scale[5] = {
  76    0,
  77    BRW_SURFACEFORMAT_R32_USCALED,
  78    BRW_SURFACEFORMAT_R32G32_USCALED,
  79    BRW_SURFACEFORMAT_R32G32B32_USCALED,
  80    BRW_SURFACEFORMAT_R32G32B32A32_USCALED
  81 };
  82
  83 static GLuint int_types_norm[5] = {
  84    0,
  85    BRW_SURFACEFORMAT_R32_SNORM,
  86    BRW_SURFACEFORMAT_R32G32_SNORM,
  87    BRW_SURFACEFORMAT_R32G32B32_SNORM,
  88    BRW_SURFACEFORMAT_R32G32B32A32_SNORM
  89 };
  90
  91 static GLuint int_types_scale[5] = {
  92    0,
  93    BRW_SURFACEFORMAT_R32_SSCALED,
  94    BRW_SURFACEFORMAT_R32G32_SSCALED,
  95    BRW_SURFACEFORMAT_R32G32B32_SSCALED,
  96    BRW_SURFACEFORMAT_R32G32B32A32_SSCALED
  97 };
  98
  99 static GLuint ushort_types_norm[5] = {
 100    0,
 101    BRW_SURFACEFORMAT_R16_UNORM,
 102    BRW_SURFACEFORMAT_R16G16_UNORM,
 103    BRW_SURFACEFORMAT_R16G16B16_UNORM,
 104    BRW_SURFACEFORMAT_R16G16B16A16_UNORM
 105 };
 106
 107 static GLuint ushort_types_scale[5] = {
 108    0,
 109    BRW_SURFACEFORMAT_R16_USCALED,
 110    BRW_SURFACEFORMAT_R16G16_USCALED,
 111    BRW_SURFACEFORMAT_R16G16B16_USCALED,
 112    BRW_SURFACEFORMAT_R16G16B16A16_USCALED
 113 };
 114
 115 static GLuint short_types_norm[5] = {
 116    0,
 117    BRW_SURFACEFORMAT_R16_SNORM,
 118    BRW_SURFACEFORMAT_R16G16_SNORM,
 119    BRW_SURFACEFORMAT_R16G16B16_SNORM,
 120    BRW_SURFACEFORMAT_R16G16B16A16_SNORM
 121 };
 122
 123 static GLuint short_types_scale[5] = {
 124    0,
 125    BRW_SURFACEFORMAT_R16_SSCALED,
 126    BRW_SURFACEFORMAT_R16G16_SSCALED,
 127    BRW_SURFACEFORMAT_R16G16B16_SSCALED,
 128    BRW_SURFACEFORMAT_R16G16B16A16_SSCALED
 129 };
 130
 131 static GLuint ubyte_types_norm[5] = {
 132    0,
 133    BRW_SURFACEFORMAT_R8_UNORM,
 134    BRW_SURFACEFORMAT_R8G8_UNORM,
 135    BRW_SURFACEFORMAT_R8G8B8_UNORM,
 136    BRW_SURFACEFORMAT_R8G8B8A8_UNORM
 137 };
 138
 139 static GLuint ubyte_types_scale[5] = {
 140    0,
 141    BRW_SURFACEFORMAT_R8_USCALED,
 142    BRW_SURFACEFORMAT_R8G8_USCALED,
 143    BRW_SURFACEFORMAT_R8G8B8_USCALED,
 144    BRW_SURFACEFORMAT_R8G8B8A8_USCALED
 145 };
 146
 147 static GLuint byte_types_norm[5] = {
 148    0,
 149    BRW_SURFACEFORMAT_R8_SNORM,
 150    BRW_SURFACEFORMAT_R8G8_SNORM,
 151    BRW_SURFACEFORMAT_R8G8B8_SNORM,
 152    BRW_SURFACEFORMAT_R8G8B8A8_SNORM
 153 };
 154
 155 static GLuint byte_types_scale[5] = {
 156    0,
 157    BRW_SURFACEFORMAT_R8_SSCALED,
 158    BRW_SURFACEFORMAT_R8G8_SSCALED,
 159    BRW_SURFACEFORMAT_R8G8B8_SSCALED,
 160    BRW_SURFACEFORMAT_R8G8B8A8_SSCALED
 161 };
 162
 163
 164 /**
 165  * Given vertex array type/size/format/normalized info, return
 166  * the appopriate hardware surface type.
 167  * Format will be GL_RGBA or possibly GL_BGRA for GLubyte[4] color arrays.
 168  */
 169 static GLuint get_surface_type( GLenum type, GLuint size,
 170                                 GLenum format, GLboolean normalized )
 171 {
 172    if (unlikely(INTEL_DEBUG & DEBUG_VERTS))
 173       printf("type %s size %d normalized %d\n",
 174                    _mesa_lookup_enum_by_nr(type), size, normalized);
 175
 176    if (normalized) {
 177       switch (type) {
 178       case GL_DOUBLE: return double_types[size];
 179       case GL_FLOAT: return float_types[size];
 180       case GL_HALF_FLOAT: return half_float_types[size];
 181       case GL_INT: return int_types_norm[size];
 182       case GL_SHORT: return short_types_norm[size];
 183       case GL_BYTE: return byte_types_norm[size];
 184       case GL_UNSIGNED_INT: return uint_types_norm[size];
 185       case GL_UNSIGNED_SHORT: return ushort_types_norm[size];
 186       case GL_UNSIGNED_BYTE:
 187          if (format == GL_BGRA) {
 188             /* See GL_EXT_vertex_array_bgra */
 189             assert(size == 4);
 190             return BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
 191          }
 192          else {
 193             return ubyte_types_norm[size];
 194          }
 195       default: assert(0); return 0;
 196       }
 197    }
 198    else {
 199       assert(format == GL_RGBA); /* sanity check */
 200       switch (type) {
 201       case GL_DOUBLE: return double_types[size];
 202       case GL_FLOAT: return float_types[size];
 203       case GL_HALF_FLOAT: return half_float_types[size];
 204       case GL_INT: return int_types_scale[size];
 205       case GL_SHORT: return short_types_scale[size];
 206       case GL_BYTE: return byte_types_scale[size];
 207       case GL_UNSIGNED_INT: return uint_types_scale[size];
 208       case GL_UNSIGNED_SHORT: return ushort_types_scale[size];
 209       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size];
 210       default: assert(0); return 0;
 211       }
 212    }
 213 }
 214
 215
 216 static GLuint get_size( GLenum type )
 217 {
 218    switch (type) {
 219    case GL_DOUBLE: return sizeof(GLdouble);
 220    case GL_FLOAT: return sizeof(GLfloat);
 221    case GL_HALF_FLOAT: return sizeof(GLhalfARB);
 222    case GL_INT: return sizeof(GLint);
 223    case GL_SHORT: return sizeof(GLshort);
 224    case GL_BYTE: return sizeof(GLbyte);
 225    case GL_UNSIGNED_INT: return sizeof(GLuint);
 226    case GL_UNSIGNED_SHORT: return sizeof(GLushort);
 227    case GL_UNSIGNED_BYTE: return sizeof(GLubyte);
 228    default: return 0;
 229    }
 230 }
 231
 232 static GLuint get_index_type(GLenum type)
 233 {
 234    switch (type) {
 235    case GL_UNSIGNED_BYTE:  return BRW_INDEX_BYTE;
 236    case GL_UNSIGNED_SHORT: return BRW_INDEX_WORD;
 237    case GL_UNSIGNED_INT:   return BRW_INDEX_DWORD;
 238    default: assert(0); return 0;
 239    }
 240 }
 241
 242 static void
 243 copy_array_to_vbo_array( struct brw_context *brw,
 244                          struct brw_vertex_element *element,
 245                          struct brw_vertex_buffer *buffer,
 246                          GLuint dst_stride)
 247 {
 248    GLuint size = element->count * dst_stride;
 249
 250    buffer->stride = dst_stride;
 251    if (dst_stride == element->glarray->StrideB) {
 252       intel_upload_data(&brw->intel, element->glarray->Ptr, size, dst_stride,
 253                         &buffer->bo, &buffer->offset);
 254    } else {
 255       const unsigned char *src = element->glarray->Ptr;
 256       char *dst = intel_upload_map(&brw->intel, size, dst_stride);
 257       int i;
 258
 259       for (i = 0; i < element->count; i++) {
 260          memcpy(dst, src, dst_stride);
 261          src += element->glarray->StrideB;
 262          dst += dst_stride;
 263       }
 264       intel_upload_unmap(&brw->intel, dst, size, dst_stride,
 265                          &buffer->bo, &buffer->offset);
 266    }
 267 }
 268
 269 static void brw_prepare_vertices(struct brw_context *brw)
 270 {
 271    struct gl_context *ctx = &brw->intel.ctx;
 272    struct intel_context *intel = intel_context(ctx);
 273    GLbitfield vs_inputs = brw->vs.prog_data->inputs_read;
 274    const unsigned char *ptr = NULL;
 275    GLuint interleaved = 0, total_size = 0;
 276    unsigned int min_index = brw->vb.min_index;
 277    unsigned int max_index = brw->vb.max_index;
 278    int i, j;
 279
 280    struct brw_vertex_element *upload[VERT_ATTRIB_MAX];
 281    GLuint nr_uploads = 0;
 282
 283    /* First build an array of pointers to ve's in vb.inputs_read
 284     */
 285    if (0)
 286       printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
 287
 288    /* Accumulate the list of enabled arrays. */
 289    brw->vb.nr_enabled = 0;
 290    while (vs_inputs) {
 291       GLuint i = _mesa_ffsll(vs_inputs) - 1;
 292       struct brw_vertex_element *input = &brw->vb.inputs[i];
 293
 294       vs_inputs &= ~(1 << i);
 295       brw->vb.enabled[brw->vb.nr_enabled++] = input;
 296    }
 297
 298    if (brw->vb.nr_enabled == 0)
 299       return;
 300
 301    if (brw->vb.nr_buffers)
 302       goto validate;
 303
 304    /* XXX: In the rare cases where this happens we fallback all
 305     * the way to software rasterization, although a tnl fallback
 306     * would be sufficient.  I don't know of *any* real world
 307     * cases with > 17 vertex attributes enabled, so it probably
 308     * isn't an issue at this point.
 309     */
 310    if (brw->vb.nr_enabled >= BRW_VEP_MAX) {
 311       intel->Fallback = GL_TRUE; /* boolean, not bitfield */
 312       return;
 313    }
 314
 315    for (i = j = 0; i < brw->vb.nr_enabled; i++) {
 316       struct brw_vertex_element *input = brw->vb.enabled[i];
 317       const struct gl_client_array *glarray = input->glarray;
 318       int type_size = get_size(glarray->Type);
 319
 320       input->element_size = type_size * glarray->Size;
 321
 322       if (_mesa_is_bufferobj(glarray->BufferObj)) {
 323          struct intel_buffer_object *intel_buffer =
 324             intel_buffer_object(glarray->BufferObj);
 325          int k;
 326
 327          for (k = 0; k < i; k++) {
 328             const struct gl_client_array *other = brw->vb.enabled[k]->glarray;
 329             if (glarray->BufferObj == other->BufferObj &&
 330                 glarray->StrideB == other->StrideB &&
 331                 (uintptr_t)(glarray->Ptr - other->Ptr) < glarray->StrideB)
 332             {
 333                input->buffer = brw->vb.enabled[k]->buffer;
 334                input->offset = glarray->Ptr - other->Ptr;
 335                break;
 336             }
 337          }
 338          if (k == i) {
 339             struct brw_vertex_buffer *buffer = &brw->vb.buffers[j];
 340             /* Named buffer object: Just reference its contents directly. */
 341             buffer->bo = intel_bufferobj_source(intel, intel_buffer,
 342                                                 &buffer->offset);
 343             drm_intel_bo_reference(buffer->bo);
 344             buffer->offset += (uintptr_t)glarray->Ptr;
 345             buffer->stride = glarray->StrideB;
 346
 347             input->buffer = j++;
 348             input->offset = 0;
 349          }
 350          input->count = glarray->_MaxElement;
 351
 352          /* This is a common place to reach if the user mistakenly supplies
 353           * a pointer in place of a VBO offset.  If we just let it go through,
 354           * we may end up dereferencing a pointer beyond the bounds of the
 355           * GTT.  We would hope that the VBO's max_index would save us, but
 356           * Mesa appears to hand us min/max values not clipped to the
 357           * array object's _MaxElement, and _MaxElement frequently appears
 358           * to be wrong anyway.
 359           *
 360           * The VBO spec allows application termination in this case, and it's
 361           * probably a service to the poor programmer to do so rather than
 362           * trying to just not render.
 363           */
 364          assert(input->offset < brw->vb.buffers[input->buffer].bo->size);
 365       } else {
 366          input->count = glarray->StrideB ? max_index + 1 : 1;
 367
 368          /* Queue the buffer object up to be uploaded in the next pass,
 369           * when we've decided if we're doing interleaved or not.
 370           */
 371          if (nr_uploads == 0) {
 372             /* Position array not properly enabled:
 373              */
 374             if (input->attrib == VERT_ATTRIB_POS && glarray->StrideB == 0) {
 375                intel->Fallback = GL_TRUE; /* boolean, not bitfield */
 376                return;
 377             }
 378
 379             interleaved = glarray->StrideB;
 380             ptr = glarray->Ptr;
 381          }
 382          else if (interleaved != glarray->StrideB ||
 383                   (uintptr_t)(glarray->Ptr - ptr) > interleaved)
 384          {
 385             interleaved = 0;
 386          }
 387          else if (total_size & (type_size -1))
 388          {
 389             /* enforce natural alignment (for doubles) */
 390             interleaved = 0;
 391          }
 392
 393          upload[nr_uploads++] = input;
 394          total_size += input->element_size;
 395       }
 396    }
 397
 398    /* Handle any arrays to be uploaded. */
 399    if (nr_uploads > 1) {
 400       if (interleaved && interleaved <= 2*total_size) {
 401          /* All uploads are interleaved, so upload the arrays together as
 402           * interleaved.  First, upload the contents and set up upload[0].
 403           */
 404          copy_array_to_vbo_array(brw,
 405                                  upload[0], &brw->vb.buffers[j],
 406                                  interleaved);
 407
 408          for (i = 0; i < nr_uploads; i++) {
 409             /* Then, just point upload[i] at upload[0]'s buffer. */
 410             upload[i]->offset =
 411                ((const unsigned char *)upload[i]->glarray->Ptr - ptr);
 412             upload[i]->buffer = j;
 413          }
 414          j++;
 415
 416          nr_uploads = 0;
 417       }
 418       else if (total_size < 2048) {
 419          /* Upload non-interleaved arrays into a single interleaved array */
 420          struct brw_vertex_buffer *buffer = &brw->vb.buffers[j];
 421          int count = upload[0]->count, offset;
 422          char *map;
 423
 424          map = intel_upload_map(&brw->intel, total_size * count, total_size);
 425          for (i = offset = 0; i < nr_uploads; i++) {
 426             const unsigned char *src = upload[i]->glarray->Ptr;
 427             int size = upload[i]->element_size;
 428             int stride = upload[i]->glarray->StrideB;
 429             char *dst = map + offset;
 430             int n;
 431
 432             for (n = 0; n < count; n++) {
 433                memcpy(dst, src, size);
 434                src += stride;
 435                dst += total_size;
 436             }
 437
 438             upload[i]->offset = offset;
 439             upload[i]->buffer = j;
 440
 441             offset += size;
 442          }
 443          intel_upload_unmap(&brw->intel, map, total_size * count, total_size,
 444                             &buffer->bo, &buffer->offset);
 445          buffer->stride = offset;
 446          j++;
 447
 448          nr_uploads = 0;
 449       }
 450    }
 451    /* Upload non-interleaved arrays */
 452    for (i = 0; i < nr_uploads; i++) {
 453       copy_array_to_vbo_array(brw,
 454                               upload[i], &brw->vb.buffers[j],
 455                               upload[i]->element_size);
 456       upload[i]->buffer = j++;
 457       upload[i]->offset = 0;
 458    }
 459
 460    /* can we simply extend the current vb? */
 461    brw->vb.start_vertex_bias = 0;
 462    if (j == brw->vb.nr_current_buffers) {
 463       int delta = 0;
 464       for (i = 0; i < j; i++) {
 465          int d;
 466
 467          if (brw->vb.current_buffers[i].handle != brw->vb.buffers[i].bo->handle ||
 468              brw->vb.current_buffers[i].stride != brw->vb.buffers[i].stride)
 469             break;
 470
 471          d = brw->vb.buffers[i].offset - brw->vb.current_buffers[i].offset;
 472          if (delta == 0)
 473             delta = d / brw->vb.current_buffers[i].stride;
 474          if (delta * brw->vb.current_buffers[i].stride != d)
 475             break;
 476       }
 477
 478       if (i == j) {
 479          brw->vb.start_vertex_bias = delta;
 480          while (--j >= 0)
 481             drm_intel_bo_unreference(brw->vb.buffers[j].bo);
 482          j = 0;
 483       }
 484    }
 485
 486    brw->vb.nr_buffers = j;
 487
 488 validate:
 489    brw_prepare_query_begin(brw);
 490    for (i = 0; i < brw->vb.nr_buffers; i++) {
 491       brw_add_validated_bo(brw, brw->vb.buffers[i].bo);
 492    }
 493 }
 494
 495 static void brw_emit_vertices(struct brw_context *brw)
 496 {
 497    struct gl_context *ctx = &brw->intel.ctx;
 498    struct intel_context *intel = intel_context(ctx);
 499    GLuint i;
 500
 501    brw_emit_query_begin(brw);
 502
 503    /* If the VS doesn't read any inputs (calculating vertex position from
 504     * a state variable for some reason, for example), emit a single pad
 505     * VERTEX_ELEMENT struct and bail.
 506     *
 507     * The stale VB state stays in place, but they don't do anything unless
 508     * a VE loads from them.
 509     */
 510    if (brw->vb.nr_enabled == 0) {
 511       BEGIN_BATCH(3);
 512       OUT_BATCH((CMD_VERTEX_ELEMENT << 16) | 1);
 513       if (intel->gen >= 6) {
 514          OUT_BATCH((0 << GEN6_VE0_INDEX_SHIFT) |
 515                    GEN6_VE0_VALID |
 516                    (BRW_SURFACEFORMAT_R32G32B32A32_FLOAT << BRW_VE0_FORMAT_SHIFT) |
 517                    (0 << BRW_VE0_SRC_OFFSET_SHIFT));
 518       } else {
 519          OUT_BATCH((0 << BRW_VE0_INDEX_SHIFT) |
 520                    BRW_VE0_VALID |
 521                    (BRW_SURFACEFORMAT_R32G32B32A32_FLOAT << BRW_VE0_FORMAT_SHIFT) |
 522                    (0 << BRW_VE0_SRC_OFFSET_SHIFT));
 523       }
 524       OUT_BATCH((BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_0_SHIFT) |
 525                 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_1_SHIFT) |
 526                 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_2_SHIFT) |
 527                 (BRW_VE1_COMPONENT_STORE_1_FLT << BRW_VE1_COMPONENT_3_SHIFT));
 528       CACHED_BATCH();
 529       return;
 530    }
 531
 532    /* Now emit VB and VEP state packets.
 533     */
 534
 535    if (brw->vb.nr_buffers) {
 536       BEGIN_BATCH(1 + 4*brw->vb.nr_buffers);
 537       OUT_BATCH((CMD_VERTEX_BUFFER << 16) | (4*brw->vb.nr_buffers - 1));
 538       for (i = 0; i < brw->vb.nr_buffers; i++) {
 539          struct brw_vertex_buffer *buffer = &brw->vb.buffers[i];
 540          uint32_t dw0;
 541
 542          if (intel->gen >= 6) {
 543             dw0 = GEN6_VB0_ACCESS_VERTEXDATA | (i << GEN6_VB0_INDEX_SHIFT);
 544          } else {
 545             dw0 = BRW_VB0_ACCESS_VERTEXDATA | (i << BRW_VB0_INDEX_SHIFT);
 546          }
 547
 548          OUT_BATCH(dw0 | (buffer->stride << BRW_VB0_PITCH_SHIFT));
 549          OUT_RELOC(buffer->bo, I915_GEM_DOMAIN_VERTEX, 0, buffer->offset);
 550          if (intel->gen >= 5) {
 551             OUT_RELOC(buffer->bo, I915_GEM_DOMAIN_VERTEX, 0, buffer->bo->size - 1);
 552          } else
 553             OUT_BATCH(buffer->bo->size / buffer->stride);
 554          OUT_BATCH(0); /* Instance data step rate */
 555
 556          brw->vb.current_buffers[i].handle = buffer->bo->handle;
 557          brw->vb.current_buffers[i].offset = buffer->offset;
 558          brw->vb.current_buffers[i].stride = buffer->stride;
 559       }
 560       brw->vb.nr_current_buffers = i;
 561       ADVANCE_BATCH();
 562    }
 563
 564    BEGIN_BATCH(1 + brw->vb.nr_enabled * 2);
 565    OUT_BATCH((CMD_VERTEX_ELEMENT << 16) | (2*brw->vb.nr_enabled - 1));
 566    for (i = 0; i < brw->vb.nr_enabled; i++) {
 567       struct brw_vertex_element *input = brw->vb.enabled[i];
 568       uint32_t format = get_surface_type(input->glarray->Type,
 569                                          input->glarray->Size,
 570                                          input->glarray->Format,
 571                                          input->glarray->Normalized);
 572       uint32_t comp0 = BRW_VE1_COMPONENT_STORE_SRC;
 573       uint32_t comp1 = BRW_VE1_COMPONENT_STORE_SRC;
 574       uint32_t comp2 = BRW_VE1_COMPONENT_STORE_SRC;
 575       uint32_t comp3 = BRW_VE1_COMPONENT_STORE_SRC;
 576
 577       switch (input->glarray->Size) {
 578       case 0: comp0 = BRW_VE1_COMPONENT_STORE_0;
 579       case 1: comp1 = BRW_VE1_COMPONENT_STORE_0;
 580       case 2: comp2 = BRW_VE1_COMPONENT_STORE_0;
 581       case 3: comp3 = BRW_VE1_COMPONENT_STORE_1_FLT;
 582          break;
 583       }
 584
 585       if (intel->gen >= 6) {
 586          OUT_BATCH((input->buffer << GEN6_VE0_INDEX_SHIFT) |
 587                    GEN6_VE0_VALID |
 588                    (format << BRW_VE0_FORMAT_SHIFT) |
 589                    (input->offset << BRW_VE0_SRC_OFFSET_SHIFT));
 590       } else {
 591          OUT_BATCH((input->buffer << BRW_VE0_INDEX_SHIFT) |
 592                    BRW_VE0_VALID |
 593                    (format << BRW_VE0_FORMAT_SHIFT) |
 594                    (input->offset << BRW_VE0_SRC_OFFSET_SHIFT));
 595       }
 596
 597       if (intel->gen >= 5)
 598           OUT_BATCH((comp0 << BRW_VE1_COMPONENT_0_SHIFT) |
 599                     (comp1 << BRW_VE1_COMPONENT_1_SHIFT) |
 600                     (comp2 << BRW_VE1_COMPONENT_2_SHIFT) |
 601                     (comp3 << BRW_VE1_COMPONENT_3_SHIFT));
 602       else
 603           OUT_BATCH((comp0 << BRW_VE1_COMPONENT_0_SHIFT) |
 604                     (comp1 << BRW_VE1_COMPONENT_1_SHIFT) |
 605                     (comp2 << BRW_VE1_COMPONENT_2_SHIFT) |
 606                     (comp3 << BRW_VE1_COMPONENT_3_SHIFT) |
 607                     ((i * 4) << BRW_VE1_DST_OFFSET_SHIFT));
 608    }
 609    CACHED_BATCH();
 610 }
 611
 612 const struct brw_tracked_state brw_vertices = {
 613    .dirty = {
 614       .mesa = 0,
 615       .brw = BRW_NEW_BATCH | BRW_NEW_VERTICES,
 616       .cache = 0,
 617    },
 618    .prepare = brw_prepare_vertices,
 619    .emit = brw_emit_vertices,
 620 };
 621
 622 static void brw_prepare_indices(struct brw_context *brw)
 623 {
 624    struct gl_context *ctx = &brw->intel.ctx;
 625    struct intel_context *intel = &brw->intel;
 626    const struct _mesa_index_buffer *index_buffer = brw->ib.ib;
 627    GLuint ib_size;
 628    drm_intel_bo *bo = NULL;
 629    struct gl_buffer_object *bufferobj;
 630    GLuint offset;
 631    GLuint ib_type_size;
 632
 633    if (index_buffer == NULL)
 634       return;
 635
 636    ib_type_size = get_size(index_buffer->type);
 637    ib_size = ib_type_size * index_buffer->count;
 638    bufferobj = index_buffer->obj;
 639
 640    /* Turn into a proper VBO:
 641     */
 642    if (!_mesa_is_bufferobj(bufferobj)) {
 643
 644       /* Get new bufferobj, offset:
 645        */
 646       intel_upload_data(&brw->intel, index_buffer->ptr, ib_size, ib_type_size,
 647                         &bo, &offset);
 648       brw->ib.start_vertex_offset = offset / ib_type_size;
 649       offset = 0;
 650    } else {
 651       offset = (GLuint) (unsigned long) index_buffer->ptr;
 652
 653       /* If the index buffer isn't aligned to its element size, we have to
 654        * rebase it into a temporary.
 655        */
 656        if ((get_size(index_buffer->type) - 1) & offset) {
 657            GLubyte *map = ctx->Driver.MapBuffer(ctx,
 658                                                 GL_ELEMENT_ARRAY_BUFFER_ARB,
 659                                                 GL_DYNAMIC_DRAW_ARB,
 660                                                 bufferobj);
 661            map += offset;
 662
 663            intel_upload_data(&brw->intel, map, ib_size, ib_type_size,
 664                              &bo, &offset);
 665            brw->ib.start_vertex_offset = offset / ib_type_size;
 666            offset = 0;
 667
 668            ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobj);
 669        } else {
 670           /* Use CMD_3D_PRIM's start_vertex_offset to avoid re-uploading
 671            * the index buffer state when we're just moving the start index
 672            * of our drawing.
 673            */
 674           brw->ib.start_vertex_offset = offset / ib_type_size;
 675
 676           bo = intel_bufferobj_source(intel, intel_buffer_object(bufferobj),
 677                                       &offset);
 678           drm_intel_bo_reference(bo);
 679        }
 680    }
 681
 682    if (brw->ib.bo != bo || brw->ib.offset != offset) {
 683       drm_intel_bo_unreference(brw->ib.bo);
 684       brw->ib.bo = bo;
 685       brw->ib.offset = offset;
 686
 687       brw_add_validated_bo(brw, brw->ib.bo);
 688       brw->state.dirty.brw |= BRW_NEW_INDEX_BUFFER;
 689    } else {
 690       drm_intel_bo_unreference(bo);
 691    }
 692 }
 693
 694 const struct brw_tracked_state brw_indices = {
 695    .dirty = {
 696       .mesa = 0,
 697       .brw = BRW_NEW_INDICES,
 698       .cache = 0,
 699    },
 700    .prepare = brw_prepare_indices,
 701 };
 702
 703 static void brw_emit_index_buffer(struct brw_context *brw)
 704 {
 705    struct intel_context *intel = &brw->intel;
 706    const struct _mesa_index_buffer *index_buffer = brw->ib.ib;
 707
 708    if (index_buffer == NULL)
 709       return;
 710
 711    BEGIN_BATCH(3);
 712    OUT_BATCH(CMD_INDEX_BUFFER << 16 |
 713              /* cut index enable << 10 */
 714              get_index_type(index_buffer->type) << 8 |
 715              1);
 716    OUT_RELOC(brw->ib.bo,
 717              I915_GEM_DOMAIN_VERTEX, 0,
 718              brw->ib.offset);
 719    OUT_RELOC(brw->ib.bo,
 720              I915_GEM_DOMAIN_VERTEX, 0,
 721              brw->ib.bo->size - 1);
 722    ADVANCE_BATCH();
 723 }
 724
 725 const struct brw_tracked_state brw_index_buffer = {
 726    .dirty = {
 727       .mesa = 0,
 728       .brw = BRW_NEW_BATCH | BRW_NEW_INDEX_BUFFER,
 729       .cache = 0,
 730    },
 731    .emit = brw_emit_index_buffer,
 732 };