src/mesa/state_tracker/st_cb_bufferobjects.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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 VMWARE 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
  29 /**
  30  * Functions for pixel buffer objects and vertex/element buffer objects.
  31  */
  32
  33
  34 #include <inttypes.h>  /* for PRId64 macro */
  35
  36 #include "main/errors.h"
  37 #include "main/imports.h"
  38 #include "main/mtypes.h"
  39 #include "main/arrayobj.h"
  40 #include "main/bufferobj.h"
  41
  42 #include "st_context.h"
  43 #include "st_cb_bufferobjects.h"
  44 #include "st_cb_memoryobjects.h"
  45 #include "st_debug.h"
  46
  47 #include "pipe/p_context.h"
  48 #include "pipe/p_defines.h"
  49 #include "util/u_inlines.h"
  50
  51
  52 /**
  53  * There is some duplication between mesa's bufferobjects and our
  54  * bufmgr buffers.  Both have an integer handle and a hashtable to
  55  * lookup an opaque structure.  It would be nice if the handles and
  56  * internal structure where somehow shared.
  57  */
  58 static struct gl_buffer_object *
  59 st_bufferobj_alloc(struct gl_context *ctx, GLuint name)
  60 {
  61    struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
  62
  63    if (!st_obj)
  64       return NULL;
  65
  66    _mesa_initialize_buffer_object(ctx, &st_obj->Base, name);
  67
  68    return &st_obj->Base;
  69 }
  70
  71
  72
  73 /**
  74  * Deallocate/free a vertex/pixel buffer object.
  75  * Called via glDeleteBuffersARB().
  76  */
  77 static void
  78 st_bufferobj_free(struct gl_context *ctx, struct gl_buffer_object *obj)
  79 {
  80    struct st_buffer_object *st_obj = st_buffer_object(obj);
  81
  82    assert(obj->RefCount == 0);
  83    _mesa_buffer_unmap_all_mappings(ctx, obj);
  84
  85    if (st_obj->buffer)
  86       pipe_resource_reference(&st_obj->buffer, NULL);
  87
  88    _mesa_delete_buffer_object(ctx, obj);
  89 }
  90
  91
  92
  93 /**
  94  * Replace data in a subrange of buffer object.  If the data range
  95  * specified by size + offset extends beyond the end of the buffer or
  96  * if data is NULL, no copy is performed.
  97  * Called via glBufferSubDataARB().
  98  */
  99 static void
 100 st_bufferobj_subdata(struct gl_context *ctx,
 101                      GLintptrARB offset,
 102                      GLsizeiptrARB size,
 103                      const void * data, struct gl_buffer_object *obj)
 104 {
 105    struct st_buffer_object *st_obj = st_buffer_object(obj);
 106
 107    /* we may be called from VBO code, so double-check params here */
 108    assert(offset >= 0);
 109    assert(size >= 0);
 110    assert(offset + size <= obj->Size);
 111
 112    if (!size)
 113       return;
 114
 115    /*
 116     * According to ARB_vertex_buffer_object specification, if data is null,
 117     * then the contents of the buffer object's data store is undefined. We just
 118     * ignore, and leave it unchanged.
 119     */
 120    if (!data)
 121       return;
 122
 123    if (!st_obj->buffer) {
 124       /* we probably ran out of memory during buffer allocation */
 125       return;
 126    }
 127
 128    /* Now that transfers are per-context, we don't have to figure out
 129     * flushing here.  Usually drivers won't need to flush in this case
 130     * even if the buffer is currently referenced by hardware - they
 131     * just queue the upload as dma rather than mapping the underlying
 132     * buffer directly.
 133     */
 134    pipe_buffer_write(st_context(ctx)->pipe,
 135                      st_obj->buffer,
 136                      offset, size, data);
 137 }
 138
 139
 140 /**
 141  * Called via glGetBufferSubDataARB().
 142  */
 143 static void
 144 st_bufferobj_get_subdata(struct gl_context *ctx,
 145                          GLintptrARB offset,
 146                          GLsizeiptrARB size,
 147                          void * data, struct gl_buffer_object *obj)
 148 {
 149    struct st_buffer_object *st_obj = st_buffer_object(obj);
 150
 151    /* we may be called from VBO code, so double-check params here */
 152    assert(offset >= 0);
 153    assert(size >= 0);
 154    assert(offset + size <= obj->Size);
 155
 156    if (!size)
 157       return;
 158
 159    if (!st_obj->buffer) {
 160       /* we probably ran out of memory during buffer allocation */
 161       return;
 162    }
 163
 164    pipe_buffer_read(st_context(ctx)->pipe, st_obj->buffer,
 165                     offset, size, data);
 166 }
 167
 168
 169 /**
 170  * Return bitmask of PIPE_BIND_x flags corresponding a GL buffer target.
 171  */
 172 static unsigned
 173 buffer_target_to_bind_flags(GLenum target)
 174 {
 175    switch (target) {
 176    case GL_PIXEL_PACK_BUFFER_ARB:
 177    case GL_PIXEL_UNPACK_BUFFER_ARB:
 178       return PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 179    case GL_ARRAY_BUFFER_ARB:
 180       return PIPE_BIND_VERTEX_BUFFER;
 181    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 182       return PIPE_BIND_INDEX_BUFFER;
 183    case GL_TEXTURE_BUFFER:
 184       return PIPE_BIND_SAMPLER_VIEW;
 185    case GL_TRANSFORM_FEEDBACK_BUFFER:
 186       return PIPE_BIND_STREAM_OUTPUT;
 187    case GL_UNIFORM_BUFFER:
 188       return PIPE_BIND_CONSTANT_BUFFER;
 189    case GL_DRAW_INDIRECT_BUFFER:
 190    case GL_PARAMETER_BUFFER_ARB:
 191       return PIPE_BIND_COMMAND_ARGS_BUFFER;
 192    case GL_ATOMIC_COUNTER_BUFFER:
 193    case GL_SHADER_STORAGE_BUFFER:
 194       return PIPE_BIND_SHADER_BUFFER;
 195    case GL_QUERY_BUFFER:
 196       return PIPE_BIND_QUERY_BUFFER;
 197    default:
 198       return 0;
 199    }
 200 }
 201
 202
 203 /**
 204  * Return bitmask of PIPE_RESOURCE_x flags corresponding to GL_MAP_x flags.
 205  */
 206 static unsigned
 207 storage_flags_to_buffer_flags(GLbitfield storageFlags)
 208 {
 209    unsigned flags = 0;
 210    if (storageFlags & GL_MAP_PERSISTENT_BIT)
 211       flags |= PIPE_RESOURCE_FLAG_MAP_PERSISTENT;
 212    if (storageFlags & GL_MAP_COHERENT_BIT)
 213       flags |= PIPE_RESOURCE_FLAG_MAP_COHERENT;
 214    if (storageFlags & GL_SPARSE_STORAGE_BIT_ARB)
 215       flags |= PIPE_RESOURCE_FLAG_SPARSE;
 216    return flags;
 217 }
 218
 219
 220 /**
 221  * From a buffer object's target, immutability flag, storage flags and
 222  * usage hint, return a pipe_resource_usage value (PIPE_USAGE_DYNAMIC,
 223  * STREAM, etc).
 224  */
 225 static const enum pipe_resource_usage
 226 buffer_usage(GLenum target, GLboolean immutable,
 227              GLbitfield storageFlags, GLenum usage)
 228 {
 229    if (immutable) {
 230       /* BufferStorage */
 231       if (storageFlags & GL_CLIENT_STORAGE_BIT) {
 232          if (storageFlags & GL_MAP_READ_BIT)
 233             return PIPE_USAGE_STAGING;
 234          else
 235             return PIPE_USAGE_STREAM;
 236       } else {
 237          return PIPE_USAGE_DEFAULT;
 238       }
 239    }
 240    else {
 241       /* BufferData */
 242       switch (usage) {
 243       case GL_DYNAMIC_DRAW:
 244       case GL_DYNAMIC_COPY:
 245          return PIPE_USAGE_DYNAMIC;
 246       case GL_STREAM_DRAW:
 247       case GL_STREAM_COPY:
 248          /* XXX: Remove this test and fall-through when we have PBO unpacking
 249           * acceleration. Right now, PBO unpacking is done by the CPU, so we
 250           * have to make sure CPU reads are fast.
 251           */
 252          if (target != GL_PIXEL_UNPACK_BUFFER_ARB) {
 253             return PIPE_USAGE_STREAM;
 254          }
 255          /* fall through */
 256       case GL_STATIC_READ:
 257       case GL_DYNAMIC_READ:
 258       case GL_STREAM_READ:
 259          return PIPE_USAGE_STAGING;
 260       case GL_STATIC_DRAW:
 261       case GL_STATIC_COPY:
 262       default:
 263          return PIPE_USAGE_DEFAULT;
 264       }
 265    }
 266 }
 267
 268
 269 static ALWAYS_INLINE GLboolean
 270 bufferobj_data(struct gl_context *ctx,
 271                GLenum target,
 272                GLsizeiptrARB size,
 273                const void *data,
 274                struct gl_memory_object *memObj,
 275                GLuint64 offset,
 276                GLenum usage,
 277                GLbitfield storageFlags,
 278                struct gl_buffer_object *obj)
 279 {
 280    struct st_context *st = st_context(ctx);
 281    struct pipe_context *pipe = st->pipe;
 282    struct pipe_screen *screen = pipe->screen;
 283    struct st_buffer_object *st_obj = st_buffer_object(obj);
 284    struct st_memory_object *st_mem_obj = st_memory_object(memObj);
 285
 286    if (target != GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD &&
 287        size && st_obj->buffer &&
 288        st_obj->Base.Size == size &&
 289        st_obj->Base.Usage == usage &&
 290        st_obj->Base.StorageFlags == storageFlags) {
 291       if (data) {
 292          /* Just discard the old contents and write new data.
 293           * This should be the same as creating a new buffer, but we avoid
 294           * a lot of validation in Mesa.
 295           */
 296          pipe->buffer_subdata(pipe, st_obj->buffer,
 297                               PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE,
 298                               0, size, data);
 299          return GL_TRUE;
 300       } else if (screen->get_param(screen, PIPE_CAP_INVALIDATE_BUFFER)) {
 301          pipe->invalidate_resource(pipe, st_obj->buffer);
 302          return GL_TRUE;
 303       }
 304    }
 305
 306    st_obj->Base.Size = size;
 307    st_obj->Base.Usage = usage;
 308    st_obj->Base.StorageFlags = storageFlags;
 309
 310    pipe_resource_reference( &st_obj->buffer, NULL );
 311
 312    const unsigned bindings = buffer_target_to_bind_flags(target);
 313
 314    if (ST_DEBUG & DEBUG_BUFFER) {
 315       debug_printf("Create buffer size %" PRId64 " bind 0x%x\n",
 316                    (int64_t) size, bindings);
 317    }
 318
 319    if (size != 0) {
 320       struct pipe_resource buffer;
 321
 322       memset(&buffer, 0, sizeof buffer);
 323       buffer.target = PIPE_BUFFER;
 324       buffer.format = PIPE_FORMAT_R8_UNORM; /* want TYPELESS or similar */
 325       buffer.bind = bindings;
 326       buffer.usage =
 327          buffer_usage(target, st_obj->Base.Immutable, storageFlags, usage);
 328       buffer.flags = storage_flags_to_buffer_flags(storageFlags);
 329       buffer.width0 = size;
 330       buffer.height0 = 1;
 331       buffer.depth0 = 1;
 332       buffer.array_size = 1;
 333
 334       if (st_mem_obj) {
 335          st_obj->buffer = screen->resource_from_memobj(screen, &buffer,
 336                                                        st_mem_obj->memory,
 337                                                        offset);
 338       }
 339       else if (target == GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD) {
 340          st_obj->buffer =
 341             screen->resource_from_user_memory(screen, &buffer, (void*)data);
 342       }
 343       else {
 344          st_obj->buffer = screen->resource_create(screen, &buffer);
 345
 346          if (st_obj->buffer && data)
 347             pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
 348       }
 349
 350       if (!st_obj->buffer) {
 351          /* out of memory */
 352          st_obj->Base.Size = 0;
 353          return GL_FALSE;
 354       }
 355    }
 356
 357    /* The current buffer may be bound, so we have to revalidate all atoms that
 358     * might be using it.
 359     */
 360    if (st_obj->Base.UsageHistory & USAGE_ARRAY_BUFFER)
 361       ctx->NewDriverState |= ST_NEW_VERTEX_ARRAYS;
 362    /* if (st_obj->Base.UsageHistory & USAGE_ELEMENT_ARRAY_BUFFER) */
 363    /*    ctx->NewDriverState |= TODO: Handle indices as gallium state; */
 364    if (st_obj->Base.UsageHistory & USAGE_UNIFORM_BUFFER)
 365       ctx->NewDriverState |= ST_NEW_UNIFORM_BUFFER;
 366    if (st_obj->Base.UsageHistory & USAGE_SHADER_STORAGE_BUFFER)
 367       ctx->NewDriverState |= ST_NEW_STORAGE_BUFFER;
 368    if (st_obj->Base.UsageHistory & USAGE_TEXTURE_BUFFER)
 369       ctx->NewDriverState |= ST_NEW_SAMPLER_VIEWS | ST_NEW_IMAGE_UNITS;
 370    if (st_obj->Base.UsageHistory & USAGE_ATOMIC_COUNTER_BUFFER)
 371       ctx->NewDriverState |= ctx->DriverFlags.NewAtomicBuffer;
 372
 373    return GL_TRUE;
 374 }
 375
 376 /**
 377  * Allocate space for and store data in a buffer object.  Any data that was
 378  * previously stored in the buffer object is lost.  If data is NULL,
 379  * memory will be allocated, but no copy will occur.
 380  * Called via ctx->Driver.BufferData().
 381  * \return GL_TRUE for success, GL_FALSE if out of memory
 382  */
 383 static GLboolean
 384 st_bufferobj_data(struct gl_context *ctx,
 385                   GLenum target,
 386                   GLsizeiptrARB size,
 387                   const void *data,
 388                   GLenum usage,
 389                   GLbitfield storageFlags,
 390                   struct gl_buffer_object *obj)
 391 {
 392    return bufferobj_data(ctx, target, size, data, NULL, 0, usage, storageFlags, obj);
 393 }
 394
 395 static GLboolean
 396 st_bufferobj_data_mem(struct gl_context *ctx,
 397                       GLenum target,
 398                       GLsizeiptrARB size,
 399                       struct gl_memory_object *memObj,
 400                       GLuint64 offset,
 401                       GLenum usage,
 402                       struct gl_buffer_object *bufObj)
 403 {
 404    return bufferobj_data(ctx, target, size, NULL, memObj, offset, usage, 0, bufObj);
 405 }
 406
 407 /**
 408  * Called via glInvalidateBuffer(Sub)Data.
 409  */
 410 static void
 411 st_bufferobj_invalidate(struct gl_context *ctx,
 412                         struct gl_buffer_object *obj,
 413                         GLintptr offset,
 414                         GLsizeiptr size)
 415 {
 416    struct st_context *st = st_context(ctx);
 417    struct pipe_context *pipe = st->pipe;
 418    struct st_buffer_object *st_obj = st_buffer_object(obj);
 419
 420    /* We ignore partial invalidates. */
 421    if (offset != 0 || size != obj->Size)
 422       return;
 423
 424    /* Nothing to invalidate. */
 425    if (!st_obj->buffer)
 426       return;
 427
 428    pipe->invalidate_resource(pipe, st_obj->buffer);
 429 }
 430
 431
 432 /**
 433  * Convert GLbitfield of GL_MAP_x flags to gallium pipe_transfer_usage flags.
 434  * \param wholeBuffer  is the whole buffer being mapped?
 435  */
 436 enum pipe_transfer_usage
 437 st_access_flags_to_transfer_flags(GLbitfield access, bool wholeBuffer)
 438 {
 439    enum pipe_transfer_usage flags = 0;
 440
 441    if (access & GL_MAP_WRITE_BIT)
 442       flags |= PIPE_TRANSFER_WRITE;
 443
 444    if (access & GL_MAP_READ_BIT)
 445       flags |= PIPE_TRANSFER_READ;
 446
 447    if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
 448       flags |= PIPE_TRANSFER_FLUSH_EXPLICIT;
 449
 450    if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
 451       flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 452    }
 453    else if (access & GL_MAP_INVALIDATE_RANGE_BIT) {
 454       if (wholeBuffer)
 455          flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 456       else
 457          flags |= PIPE_TRANSFER_DISCARD_RANGE;
 458    }
 459
 460    if (access & GL_MAP_UNSYNCHRONIZED_BIT)
 461       flags |= PIPE_TRANSFER_UNSYNCHRONIZED;
 462
 463    if (access & GL_MAP_PERSISTENT_BIT)
 464       flags |= PIPE_TRANSFER_PERSISTENT;
 465
 466    if (access & GL_MAP_COHERENT_BIT)
 467       flags |= PIPE_TRANSFER_COHERENT;
 468
 469    /* ... other flags ...
 470    */
 471
 472    if (access & MESA_MAP_NOWAIT_BIT)
 473       flags |= PIPE_TRANSFER_DONTBLOCK;
 474
 475    return flags;
 476 }
 477
 478
 479 /**
 480  * Called via glMapBufferRange().
 481  */
 482 static void *
 483 st_bufferobj_map_range(struct gl_context *ctx,
 484                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 485                        struct gl_buffer_object *obj,
 486                        gl_map_buffer_index index)
 487 {
 488    struct pipe_context *pipe = st_context(ctx)->pipe;
 489    struct st_buffer_object *st_obj = st_buffer_object(obj);
 490
 491    assert(offset >= 0);
 492    assert(length >= 0);
 493    assert(offset < obj->Size);
 494    assert(offset + length <= obj->Size);
 495
 496    const enum pipe_transfer_usage transfer_flags =
 497       st_access_flags_to_transfer_flags(access,
 498                                         offset == 0 && length == obj->Size);
 499
 500    obj->Mappings[index].Pointer = pipe_buffer_map_range(pipe,
 501                                                         st_obj->buffer,
 502                                                         offset, length,
 503                                                         transfer_flags,
 504                                                         &st_obj->transfer[index]);
 505    if (obj->Mappings[index].Pointer) {
 506       obj->Mappings[index].Offset = offset;
 507       obj->Mappings[index].Length = length;
 508       obj->Mappings[index].AccessFlags = access;
 509    }
 510    else {
 511       st_obj->transfer[index] = NULL;
 512    }
 513
 514    return obj->Mappings[index].Pointer;
 515 }
 516
 517
 518 static void
 519 st_bufferobj_flush_mapped_range(struct gl_context *ctx,
 520                                 GLintptr offset, GLsizeiptr length,
 521                                 struct gl_buffer_object *obj,
 522                                 gl_map_buffer_index index)
 523 {
 524    struct pipe_context *pipe = st_context(ctx)->pipe;
 525    struct st_buffer_object *st_obj = st_buffer_object(obj);
 526
 527    /* Subrange is relative to mapped range */
 528    assert(offset >= 0);
 529    assert(length >= 0);
 530    assert(offset + length <= obj->Mappings[index].Length);
 531    assert(obj->Mappings[index].Pointer);
 532
 533    if (!length)
 534       return;
 535
 536    pipe_buffer_flush_mapped_range(pipe, st_obj->transfer[index],
 537                                   obj->Mappings[index].Offset + offset,
 538                                   length);
 539 }
 540
 541
 542 /**
 543  * Called via glUnmapBufferARB().
 544  */
 545 static GLboolean
 546 st_bufferobj_unmap(struct gl_context *ctx, struct gl_buffer_object *obj,
 547                    gl_map_buffer_index index)
 548 {
 549    struct pipe_context *pipe = st_context(ctx)->pipe;
 550    struct st_buffer_object *st_obj = st_buffer_object(obj);
 551
 552    if (obj->Mappings[index].Length)
 553       pipe_buffer_unmap(pipe, st_obj->transfer[index]);
 554
 555    st_obj->transfer[index] = NULL;
 556    obj->Mappings[index].Pointer = NULL;
 557    obj->Mappings[index].Offset = 0;
 558    obj->Mappings[index].Length = 0;
 559    return GL_TRUE;
 560 }
 561
 562
 563 /**
 564  * Called via glCopyBufferSubData().
 565  */
 566 static void
 567 st_copy_buffer_subdata(struct gl_context *ctx,
 568                        struct gl_buffer_object *src,
 569                        struct gl_buffer_object *dst,
 570                        GLintptr readOffset, GLintptr writeOffset,
 571                        GLsizeiptr size)
 572 {
 573    struct pipe_context *pipe = st_context(ctx)->pipe;
 574    struct st_buffer_object *srcObj = st_buffer_object(src);
 575    struct st_buffer_object *dstObj = st_buffer_object(dst);
 576    struct pipe_box box;
 577
 578    if (!size)
 579       return;
 580
 581    /* buffer should not already be mapped */
 582    assert(!_mesa_check_disallowed_mapping(src));
 583    assert(!_mesa_check_disallowed_mapping(dst));
 584
 585    u_box_1d(readOffset, size, &box);
 586
 587    pipe->resource_copy_region(pipe, dstObj->buffer, 0, writeOffset, 0, 0,
 588                               srcObj->buffer, 0, &box);
 589 }
 590
 591 /**
 592  * Called via glClearBufferSubData().
 593  */
 594 static void
 595 st_clear_buffer_subdata(struct gl_context *ctx,
 596                         GLintptr offset, GLsizeiptr size,
 597                         const void *clearValue,
 598                         GLsizeiptr clearValueSize,
 599                         struct gl_buffer_object *bufObj)
 600 {
 601    struct pipe_context *pipe = st_context(ctx)->pipe;
 602    struct st_buffer_object *buf = st_buffer_object(bufObj);
 603    static const char zeros[16] = {0};
 604
 605    if (!pipe->clear_buffer) {
 606       _mesa_ClearBufferSubData_sw(ctx, offset, size,
 607                                   clearValue, clearValueSize, bufObj);
 608       return;
 609    }
 610
 611    if (!clearValue)
 612       clearValue = zeros;
 613
 614    pipe->clear_buffer(pipe, buf->buffer, offset, size,
 615                       clearValue, clearValueSize);
 616 }
 617
 618 static void
 619 st_bufferobj_page_commitment(struct gl_context *ctx,
 620                              struct gl_buffer_object *bufferObj,
 621                              GLintptr offset, GLsizeiptr size,
 622                              GLboolean commit)
 623 {
 624    struct pipe_context *pipe = st_context(ctx)->pipe;
 625    struct st_buffer_object *buf = st_buffer_object(bufferObj);
 626    struct pipe_box box;
 627
 628    u_box_1d(offset, size, &box);
 629
 630    if (!pipe->resource_commit(pipe, buf->buffer, 0, &box, commit)) {
 631       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferPageCommitmentARB(out of memory)");
 632       return;
 633    }
 634 }
 635
 636 void
 637 st_init_bufferobject_functions(struct pipe_screen *screen,
 638                                struct dd_function_table *functions)
 639 {
 640    functions->NewBufferObject = st_bufferobj_alloc;
 641    functions->DeleteBuffer = st_bufferobj_free;
 642    functions->BufferData = st_bufferobj_data;
 643    functions->BufferDataMem = st_bufferobj_data_mem;
 644    functions->BufferSubData = st_bufferobj_subdata;
 645    functions->GetBufferSubData = st_bufferobj_get_subdata;
 646    functions->MapBufferRange = st_bufferobj_map_range;
 647    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 648    functions->UnmapBuffer = st_bufferobj_unmap;
 649    functions->CopyBufferSubData = st_copy_buffer_subdata;
 650    functions->ClearBufferSubData = st_clear_buffer_subdata;
 651    functions->BufferPageCommitment = st_bufferobj_page_commitment;
 652
 653    if (screen->get_param(screen, PIPE_CAP_INVALIDATE_BUFFER))
 654       functions->InvalidateBufferSubData = st_bufferobj_invalidate;
 655 }