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 #include "st_util.h"
  47
  48 #include "pipe/p_context.h"
  49 #include "pipe/p_defines.h"
  50 #include "util/u_inlines.h"
  51
  52
  53 /**
  54  * There is some duplication between mesa's bufferobjects and our
  55  * bufmgr buffers.  Both have an integer handle and a hashtable to
  56  * lookup an opaque structure.  It would be nice if the handles and
  57  * internal structure where somehow shared.
  58  */
  59 static struct gl_buffer_object *
  60 st_bufferobj_alloc(struct gl_context *ctx, GLuint name)
  61 {
  62    struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
  63
  64    if (!st_obj)
  65       return NULL;
  66
  67    _mesa_initialize_buffer_object(ctx, &st_obj->Base, name);
  68
  69    return &st_obj->Base;
  70 }
  71
  72
  73
  74 /**
  75  * Deallocate/free a vertex/pixel buffer object.
  76  * Called via glDeleteBuffersARB().
  77  */
  78 static void
  79 st_bufferobj_free(struct gl_context *ctx, struct gl_buffer_object *obj)
  80 {
  81    struct st_buffer_object *st_obj = st_buffer_object(obj);
  82
  83    assert(obj->RefCount == 0);
  84    _mesa_buffer_unmap_all_mappings(ctx, obj);
  85
  86    if (st_obj->buffer)
  87       pipe_resource_reference(&st_obj->buffer, NULL);
  88
  89    _mesa_delete_buffer_object(ctx, obj);
  90 }
  91
  92
  93
  94 /**
  95  * Replace data in a subrange of buffer object.  If the data range
  96  * specified by size + offset extends beyond the end of the buffer or
  97  * if data is NULL, no copy is performed.
  98  * Called via glBufferSubDataARB().
  99  */
 100 static void
 101 st_bufferobj_subdata(struct gl_context *ctx,
 102                      GLintptrARB offset,
 103                      GLsizeiptrARB size,
 104                      const void * data, struct gl_buffer_object *obj)
 105 {
 106    struct st_buffer_object *st_obj = st_buffer_object(obj);
 107
 108    /* we may be called from VBO code, so double-check params here */
 109    assert(offset >= 0);
 110    assert(size >= 0);
 111    assert(offset + size <= obj->Size);
 112
 113    if (!size)
 114       return;
 115
 116    /*
 117     * According to ARB_vertex_buffer_object specification, if data is null,
 118     * then the contents of the buffer object's data store is undefined. We just
 119     * ignore, and leave it unchanged.
 120     */
 121    if (!data)
 122       return;
 123
 124    if (!st_obj->buffer) {
 125       /* we probably ran out of memory during buffer allocation */
 126       return;
 127    }
 128
 129    /* Now that transfers are per-context, we don't have to figure out
 130     * flushing here.  Usually drivers won't need to flush in this case
 131     * even if the buffer is currently referenced by hardware - they
 132     * just queue the upload as dma rather than mapping the underlying
 133     * buffer directly.
 134     */
 135    pipe_buffer_write(st_context(ctx)->pipe,
 136                      st_obj->buffer,
 137                      offset, size, data);
 138 }
 139
 140
 141 /**
 142  * Called via glGetBufferSubDataARB().
 143  */
 144 static void
 145 st_bufferobj_get_subdata(struct gl_context *ctx,
 146                          GLintptrARB offset,
 147                          GLsizeiptrARB size,
 148                          void * data, struct gl_buffer_object *obj)
 149 {
 150    struct st_buffer_object *st_obj = st_buffer_object(obj);
 151
 152    /* we may be called from VBO code, so double-check params here */
 153    assert(offset >= 0);
 154    assert(size >= 0);
 155    assert(offset + size <= obj->Size);
 156
 157    if (!size)
 158       return;
 159
 160    if (!st_obj->buffer) {
 161       /* we probably ran out of memory during buffer allocation */
 162       return;
 163    }
 164
 165    pipe_buffer_read(st_context(ctx)->pipe, st_obj->buffer,
 166                     offset, size, data);
 167 }
 168
 169
 170 /**
 171  * Return bitmask of PIPE_BIND_x flags corresponding a GL buffer target.
 172  */
 173 static unsigned
 174 buffer_target_to_bind_flags(GLenum target)
 175 {
 176    switch (target) {
 177    case GL_PIXEL_PACK_BUFFER_ARB:
 178    case GL_PIXEL_UNPACK_BUFFER_ARB:
 179       return PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 180    case GL_ARRAY_BUFFER_ARB:
 181       return PIPE_BIND_VERTEX_BUFFER;
 182    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 183       return PIPE_BIND_INDEX_BUFFER;
 184    case GL_TEXTURE_BUFFER:
 185       return PIPE_BIND_SAMPLER_VIEW;
 186    case GL_TRANSFORM_FEEDBACK_BUFFER:
 187       return PIPE_BIND_STREAM_OUTPUT;
 188    case GL_UNIFORM_BUFFER:
 189       return PIPE_BIND_CONSTANT_BUFFER;
 190    case GL_DRAW_INDIRECT_BUFFER:
 191    case GL_PARAMETER_BUFFER_ARB:
 192       return PIPE_BIND_COMMAND_ARGS_BUFFER;
 193    case GL_ATOMIC_COUNTER_BUFFER:
 194    case GL_SHADER_STORAGE_BUFFER:
 195       return PIPE_BIND_SHADER_BUFFER;
 196    case GL_QUERY_BUFFER:
 197       return PIPE_BIND_QUERY_BUFFER;
 198    default:
 199       return 0;
 200    }
 201 }
 202
 203
 204 /**
 205  * Return bitmask of PIPE_RESOURCE_x flags corresponding to GL_MAP_x flags.
 206  */
 207 static unsigned
 208 storage_flags_to_buffer_flags(GLbitfield storageFlags)
 209 {
 210    unsigned flags = 0;
 211    if (storageFlags & GL_MAP_PERSISTENT_BIT)
 212       flags |= PIPE_RESOURCE_FLAG_MAP_PERSISTENT;
 213    if (storageFlags & GL_MAP_COHERENT_BIT)
 214       flags |= PIPE_RESOURCE_FLAG_MAP_COHERENT;
 215    if (storageFlags & GL_SPARSE_STORAGE_BIT_ARB)
 216       flags |= PIPE_RESOURCE_FLAG_SPARSE;
 217    return flags;
 218 }
 219
 220
 221 /**
 222  * From a buffer object's target, immutability flag, storage flags and
 223  * usage hint, return a pipe_resource_usage value (PIPE_USAGE_DYNAMIC,
 224  * STREAM, etc).
 225  */
 226 static enum pipe_resource_usage
 227 buffer_usage(GLenum target, GLboolean immutable,
 228              GLbitfield storageFlags, GLenum usage)
 229 {
 230    if (immutable) {
 231       /* BufferStorage */
 232       if (storageFlags & GL_CLIENT_STORAGE_BIT) {
 233          if (storageFlags & GL_MAP_READ_BIT)
 234             return PIPE_USAGE_STAGING;
 235          else
 236             return PIPE_USAGE_STREAM;
 237       } else {
 238          return PIPE_USAGE_DEFAULT;
 239       }
 240    }
 241    else {
 242       /* BufferData */
 243       switch (usage) {
 244       case GL_DYNAMIC_DRAW:
 245       case GL_DYNAMIC_COPY:
 246          return PIPE_USAGE_DYNAMIC;
 247       case GL_STREAM_DRAW:
 248       case GL_STREAM_COPY:
 249          /* XXX: Remove this test and fall-through when we have PBO unpacking
 250           * acceleration. Right now, PBO unpacking is done by the CPU, so we
 251           * have to make sure CPU reads are fast.
 252           */
 253          if (target != GL_PIXEL_UNPACK_BUFFER_ARB) {
 254             return PIPE_USAGE_STREAM;
 255          }
 256          /* fall through */
 257       case GL_STATIC_READ:
 258       case GL_DYNAMIC_READ:
 259       case GL_STREAM_READ:
 260          return PIPE_USAGE_STAGING;
 261       case GL_STATIC_DRAW:
 262       case GL_STATIC_COPY:
 263       default:
 264          return PIPE_USAGE_DEFAULT;
 265       }
 266    }
 267 }
 268
 269
 270 static ALWAYS_INLINE GLboolean
 271 bufferobj_data(struct gl_context *ctx,
 272                GLenum target,
 273                GLsizeiptrARB size,
 274                const void *data,
 275                struct gl_memory_object *memObj,
 276                GLuint64 offset,
 277                GLenum usage,
 278                GLbitfield storageFlags,
 279                struct gl_buffer_object *obj)
 280 {
 281    struct st_context *st = st_context(ctx);
 282    struct pipe_context *pipe = st->pipe;
 283    struct pipe_screen *screen = pipe->screen;
 284    struct st_buffer_object *st_obj = st_buffer_object(obj);
 285    struct st_memory_object *st_mem_obj = st_memory_object(memObj);
 286
 287    if (target != GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD &&
 288        size && st_obj->buffer &&
 289        st_obj->Base.Size == size &&
 290        st_obj->Base.Usage == usage &&
 291        st_obj->Base.StorageFlags == storageFlags) {
 292       if (data) {
 293          /* Just discard the old contents and write new data.
 294           * This should be the same as creating a new buffer, but we avoid
 295           * a lot of validation in Mesa.
 296           */
 297          pipe->buffer_subdata(pipe, st_obj->buffer,
 298                               PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE,
 299                               0, size, data);
 300          return GL_TRUE;
 301       } else if (screen->get_param(screen, PIPE_CAP_INVALIDATE_BUFFER)) {
 302          pipe->invalidate_resource(pipe, st_obj->buffer);
 303          return GL_TRUE;
 304       }
 305    }
 306
 307    st_obj->Base.Size = size;
 308    st_obj->Base.Usage = usage;
 309    st_obj->Base.StorageFlags = storageFlags;
 310
 311    pipe_resource_reference( &st_obj->buffer, NULL );
 312
 313    const unsigned bindings = buffer_target_to_bind_flags(target);
 314
 315    if (ST_DEBUG & DEBUG_BUFFER) {
 316       debug_printf("Create buffer size %" PRId64 " bind 0x%x\n",
 317                    (int64_t) size, bindings);
 318    }
 319
 320    if (size != 0) {
 321       struct pipe_resource buffer;
 322
 323       memset(&buffer, 0, sizeof buffer);
 324       buffer.target = PIPE_BUFFER;
 325       buffer.format = PIPE_FORMAT_R8_UNORM; /* want TYPELESS or similar */
 326       buffer.bind = bindings;
 327       buffer.usage =
 328          buffer_usage(target, st_obj->Base.Immutable, storageFlags, usage);
 329       buffer.flags = storage_flags_to_buffer_flags(storageFlags);
 330       buffer.width0 = size;
 331       buffer.height0 = 1;
 332       buffer.depth0 = 1;
 333       buffer.array_size = 1;
 334
 335       if (st_mem_obj) {
 336          st_obj->buffer = screen->resource_from_memobj(screen, &buffer,
 337                                                        st_mem_obj->memory,
 338                                                        offset);
 339       }
 340       else if (target == GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD) {
 341          st_obj->buffer =
 342             screen->resource_from_user_memory(screen, &buffer, (void*)data);
 343       }
 344       else {
 345          st_obj->buffer = screen->resource_create(screen, &buffer);
 346
 347          if (st_obj->buffer && data)
 348             pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
 349       }
 350
 351       if (!st_obj->buffer) {
 352          /* out of memory */
 353          st_obj->Base.Size = 0;
 354          return GL_FALSE;
 355       }
 356    }
 357
 358    /* The current buffer may be bound, so we have to revalidate all atoms that
 359     * might be using it.
 360     */
 361    if (st_obj->Base.UsageHistory & USAGE_ARRAY_BUFFER)
 362       ctx->NewDriverState |= ST_NEW_VERTEX_ARRAYS;
 363    /* if (st_obj->Base.UsageHistory & USAGE_ELEMENT_ARRAY_BUFFER) */
 364    /*    ctx->NewDriverState |= TODO: Handle indices as gallium state; */
 365    if (st_obj->Base.UsageHistory & USAGE_UNIFORM_BUFFER)
 366       ctx->NewDriverState |= ST_NEW_UNIFORM_BUFFER;
 367    if (st_obj->Base.UsageHistory & USAGE_SHADER_STORAGE_BUFFER)
 368       ctx->NewDriverState |= ST_NEW_STORAGE_BUFFER;
 369    if (st_obj->Base.UsageHistory & USAGE_TEXTURE_BUFFER)
 370       ctx->NewDriverState |= ST_NEW_SAMPLER_VIEWS | ST_NEW_IMAGE_UNITS;
 371    if (st_obj->Base.UsageHistory & USAGE_ATOMIC_COUNTER_BUFFER)
 372       ctx->NewDriverState |= ctx->DriverFlags.NewAtomicBuffer;
 373
 374    return GL_TRUE;
 375 }
 376
 377 /**
 378  * Allocate space for and store data in a buffer object.  Any data that was
 379  * previously stored in the buffer object is lost.  If data is NULL,
 380  * memory will be allocated, but no copy will occur.
 381  * Called via ctx->Driver.BufferData().
 382  * \return GL_TRUE for success, GL_FALSE if out of memory
 383  */
 384 static GLboolean
 385 st_bufferobj_data(struct gl_context *ctx,
 386                   GLenum target,
 387                   GLsizeiptrARB size,
 388                   const void *data,
 389                   GLenum usage,
 390                   GLbitfield storageFlags,
 391                   struct gl_buffer_object *obj)
 392 {
 393    return bufferobj_data(ctx, target, size, data, NULL, 0, usage, storageFlags, obj);
 394 }
 395
 396 static GLboolean
 397 st_bufferobj_data_mem(struct gl_context *ctx,
 398                       GLenum target,
 399                       GLsizeiptrARB size,
 400                       struct gl_memory_object *memObj,
 401                       GLuint64 offset,
 402                       GLenum usage,
 403                       struct gl_buffer_object *bufObj)
 404 {
 405    return bufferobj_data(ctx, target, size, NULL, memObj, offset, usage, 0, bufObj);
 406 }
 407
 408 /**
 409  * Called via glInvalidateBuffer(Sub)Data.
 410  */
 411 static void
 412 st_bufferobj_invalidate(struct gl_context *ctx,
 413                         struct gl_buffer_object *obj,
 414                         GLintptr offset,
 415                         GLsizeiptr size)
 416 {
 417    struct st_context *st = st_context(ctx);
 418    struct pipe_context *pipe = st->pipe;
 419    struct st_buffer_object *st_obj = st_buffer_object(obj);
 420
 421    /* We ignore partial invalidates. */
 422    if (offset != 0 || size != obj->Size)
 423       return;
 424
 425    /* Nothing to invalidate. */
 426    if (!st_obj->buffer)
 427       return;
 428
 429    pipe->invalidate_resource(pipe, st_obj->buffer);
 430 }
 431
 432
 433 /**
 434  * Convert GLbitfield of GL_MAP_x flags to gallium pipe_transfer_usage flags.
 435  * \param wholeBuffer  is the whole buffer being mapped?
 436  */
 437 enum pipe_transfer_usage
 438 st_access_flags_to_transfer_flags(GLbitfield access, bool wholeBuffer)
 439 {
 440    enum pipe_transfer_usage flags = 0;
 441
 442    if (access & GL_MAP_WRITE_BIT)
 443       flags |= PIPE_TRANSFER_WRITE;
 444
 445    if (access & GL_MAP_READ_BIT)
 446       flags |= PIPE_TRANSFER_READ;
 447
 448    if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
 449       flags |= PIPE_TRANSFER_FLUSH_EXPLICIT;
 450
 451    if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
 452       flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 453    }
 454    else if (access & GL_MAP_INVALIDATE_RANGE_BIT) {
 455       if (wholeBuffer)
 456          flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 457       else
 458          flags |= PIPE_TRANSFER_DISCARD_RANGE;
 459    }
 460
 461    if (access & GL_MAP_UNSYNCHRONIZED_BIT)
 462       flags |= PIPE_TRANSFER_UNSYNCHRONIZED;
 463
 464    if (access & GL_MAP_PERSISTENT_BIT)
 465       flags |= PIPE_TRANSFER_PERSISTENT;
 466
 467    if (access & GL_MAP_COHERENT_BIT)
 468       flags |= PIPE_TRANSFER_COHERENT;
 469
 470    /* ... other flags ...
 471    */
 472
 473    if (access & MESA_MAP_NOWAIT_BIT)
 474       flags |= PIPE_TRANSFER_DONTBLOCK;
 475
 476    return flags;
 477 }
 478
 479
 480 /**
 481  * Called via glMapBufferRange().
 482  */
 483 static void *
 484 st_bufferobj_map_range(struct gl_context *ctx,
 485                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 486                        struct gl_buffer_object *obj,
 487                        gl_map_buffer_index index)
 488 {
 489    struct pipe_context *pipe = st_context(ctx)->pipe;
 490    struct st_buffer_object *st_obj = st_buffer_object(obj);
 491
 492    assert(offset >= 0);
 493    assert(length >= 0);
 494    assert(offset < obj->Size);
 495    assert(offset + length <= obj->Size);
 496
 497    const enum pipe_transfer_usage transfer_flags =
 498       st_access_flags_to_transfer_flags(access,
 499                                         offset == 0 && length == obj->Size);
 500
 501    obj->Mappings[index].Pointer = pipe_buffer_map_range(pipe,
 502                                                         st_obj->buffer,
 503                                                         offset, length,
 504                                                         transfer_flags,
 505                                                         &st_obj->transfer[index]);
 506    if (obj->Mappings[index].Pointer) {
 507       obj->Mappings[index].Offset = offset;
 508       obj->Mappings[index].Length = length;
 509       obj->Mappings[index].AccessFlags = access;
 510    }
 511    else {
 512       st_obj->transfer[index] = NULL;
 513    }
 514
 515    return obj->Mappings[index].Pointer;
 516 }
 517
 518
 519 static void
 520 st_bufferobj_flush_mapped_range(struct gl_context *ctx,
 521                                 GLintptr offset, GLsizeiptr length,
 522                                 struct gl_buffer_object *obj,
 523                                 gl_map_buffer_index index)
 524 {
 525    struct pipe_context *pipe = st_context(ctx)->pipe;
 526    struct st_buffer_object *st_obj = st_buffer_object(obj);
 527
 528    /* Subrange is relative to mapped range */
 529    assert(offset >= 0);
 530    assert(length >= 0);
 531    assert(offset + length <= obj->Mappings[index].Length);
 532    assert(obj->Mappings[index].Pointer);
 533
 534    if (!length)
 535       return;
 536
 537    pipe_buffer_flush_mapped_range(pipe, st_obj->transfer[index],
 538                                   obj->Mappings[index].Offset + offset,
 539                                   length);
 540 }
 541
 542
 543 /**
 544  * Called via glUnmapBufferARB().
 545  */
 546 static GLboolean
 547 st_bufferobj_unmap(struct gl_context *ctx, struct gl_buffer_object *obj,
 548                    gl_map_buffer_index index)
 549 {
 550    struct pipe_context *pipe = st_context(ctx)->pipe;
 551    struct st_buffer_object *st_obj = st_buffer_object(obj);
 552
 553    if (obj->Mappings[index].Length)
 554       pipe_buffer_unmap(pipe, st_obj->transfer[index]);
 555
 556    st_obj->transfer[index] = NULL;
 557    obj->Mappings[index].Pointer = NULL;
 558    obj->Mappings[index].Offset = 0;
 559    obj->Mappings[index].Length = 0;
 560    return GL_TRUE;
 561 }
 562
 563
 564 /**
 565  * Called via glCopyBufferSubData().
 566  */
 567 static void
 568 st_copy_buffer_subdata(struct gl_context *ctx,
 569                        struct gl_buffer_object *src,
 570                        struct gl_buffer_object *dst,
 571                        GLintptr readOffset, GLintptr writeOffset,
 572                        GLsizeiptr size)
 573 {
 574    struct pipe_context *pipe = st_context(ctx)->pipe;
 575    struct st_buffer_object *srcObj = st_buffer_object(src);
 576    struct st_buffer_object *dstObj = st_buffer_object(dst);
 577    struct pipe_box box;
 578
 579    if (!size)
 580       return;
 581
 582    /* buffer should not already be mapped */
 583    assert(!_mesa_check_disallowed_mapping(src));
 584    assert(!_mesa_check_disallowed_mapping(dst));
 585
 586    u_box_1d(readOffset, size, &box);
 587
 588    pipe->resource_copy_region(pipe, dstObj->buffer, 0, writeOffset, 0, 0,
 589                               srcObj->buffer, 0, &box);
 590 }
 591
 592 /**
 593  * Called via glClearBufferSubData().
 594  */
 595 static void
 596 st_clear_buffer_subdata(struct gl_context *ctx,
 597                         GLintptr offset, GLsizeiptr size,
 598                         const void *clearValue,
 599                         GLsizeiptr clearValueSize,
 600                         struct gl_buffer_object *bufObj)
 601 {
 602    struct pipe_context *pipe = st_context(ctx)->pipe;
 603    struct st_buffer_object *buf = st_buffer_object(bufObj);
 604    static const char zeros[16] = {0};
 605
 606    if (!pipe->clear_buffer) {
 607       _mesa_ClearBufferSubData_sw(ctx, offset, size,
 608                                   clearValue, clearValueSize, bufObj);
 609       return;
 610    }
 611
 612    if (!clearValue)
 613       clearValue = zeros;
 614
 615    pipe->clear_buffer(pipe, buf->buffer, offset, size,
 616                       clearValue, clearValueSize);
 617 }
 618
 619 static void
 620 st_bufferobj_page_commitment(struct gl_context *ctx,
 621                              struct gl_buffer_object *bufferObj,
 622                              GLintptr offset, GLsizeiptr size,
 623                              GLboolean commit)
 624 {
 625    struct pipe_context *pipe = st_context(ctx)->pipe;
 626    struct st_buffer_object *buf = st_buffer_object(bufferObj);
 627    struct pipe_box box;
 628
 629    u_box_1d(offset, size, &box);
 630
 631    if (!pipe->resource_commit(pipe, buf->buffer, 0, &box, commit)) {
 632       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferPageCommitmentARB(out of memory)");
 633       return;
 634    }
 635 }
 636
 637 void
 638 st_init_bufferobject_functions(struct pipe_screen *screen,
 639                                struct dd_function_table *functions)
 640 {
 641    functions->NewBufferObject = st_bufferobj_alloc;
 642    functions->DeleteBuffer = st_bufferobj_free;
 643    functions->BufferData = st_bufferobj_data;
 644    functions->BufferDataMem = st_bufferobj_data_mem;
 645    functions->BufferSubData = st_bufferobj_subdata;
 646    functions->GetBufferSubData = st_bufferobj_get_subdata;
 647    functions->MapBufferRange = st_bufferobj_map_range;
 648    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 649    functions->UnmapBuffer = st_bufferobj_unmap;
 650    functions->CopyBufferSubData = st_copy_buffer_subdata;
 651    functions->ClearBufferSubData = st_clear_buffer_subdata;
 652    functions->BufferPageCommitment = st_bufferobj_page_commitment;
 653
 654    if (screen->get_param(screen, PIPE_CAP_INVALIDATE_BUFFER))
 655       functions->InvalidateBufferSubData = st_bufferobj_invalidate;
 656 }