src/mesa/state_tracker/st_cb_bufferobjects.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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
  29 /**
  30  * Functions for pixel buffer objects and vertex/element buffer objects.
  31  */
  32
  33
  34 #include "main/imports.h"
  35 #include "main/mtypes.h"
  36 #include "main/arrayobj.h"
  37 #include "main/bufferobj.h"
  38
  39 #include "st_context.h"
  40 #include "st_cb_bufferobjects.h"
  41 #include "st_debug.h"
  42
  43 #include "pipe/p_context.h"
  44 #include "pipe/p_defines.h"
  45 #include "util/u_inlines.h"
  46
  47
  48 /**
  49  * There is some duplication between mesa's bufferobjects and our
  50  * bufmgr buffers.  Both have an integer handle and a hashtable to
  51  * lookup an opaque structure.  It would be nice if the handles and
  52  * internal structure where somehow shared.
  53  */
  54 static struct gl_buffer_object *
  55 st_bufferobj_alloc(struct gl_context *ctx, GLuint name, GLenum target)
  56 {
  57    struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
  58
  59    if (!st_obj)
  60       return NULL;
  61
  62    _mesa_initialize_buffer_object(ctx, &st_obj->Base, name, target);
  63
  64    return &st_obj->Base;
  65 }
  66
  67
  68
  69 /**
  70  * Deallocate/free a vertex/pixel buffer object.
  71  * Called via glDeleteBuffersARB().
  72  */
  73 static void
  74 st_bufferobj_free(struct gl_context *ctx, struct gl_buffer_object *obj)
  75 {
  76    struct st_buffer_object *st_obj = st_buffer_object(obj);
  77
  78    assert(obj->RefCount == 0);
  79    assert(st_obj->transfer == NULL);
  80
  81    if (st_obj->buffer)
  82       pipe_resource_reference(&st_obj->buffer, NULL);
  83
  84    free(st_obj);
  85 }
  86
  87
  88
  89 /**
  90  * Replace data in a subrange of buffer object.  If the data range
  91  * specified by size + offset extends beyond the end of the buffer or
  92  * if data is NULL, no copy is performed.
  93  * Called via glBufferSubDataARB().
  94  */
  95 static void
  96 st_bufferobj_subdata(struct gl_context *ctx,
  97                      GLintptrARB offset,
  98                      GLsizeiptrARB size,
  99                      const GLvoid * data, struct gl_buffer_object *obj)
 100 {
 101    struct st_buffer_object *st_obj = st_buffer_object(obj);
 102
 103    /* we may be called from VBO code, so double-check params here */
 104    ASSERT(offset >= 0);
 105    ASSERT(size >= 0);
 106    ASSERT(offset + size <= obj->Size);
 107
 108    if (!size)
 109       return;
 110
 111    /*
 112     * According to ARB_vertex_buffer_object specification, if data is null,
 113     * then the contents of the buffer object's data store is undefined. We just
 114     * ignore, and leave it unchanged.
 115     */
 116    if (!data)
 117       return;
 118
 119    if (!st_obj->buffer) {
 120       /* we probably ran out of memory during buffer allocation */
 121       return;
 122    }
 123
 124    /* Now that transfers are per-context, we don't have to figure out
 125     * flushing here.  Usually drivers won't need to flush in this case
 126     * even if the buffer is currently referenced by hardware - they
 127     * just queue the upload as dma rather than mapping the underlying
 128     * buffer directly.
 129     */
 130    pipe_buffer_write(st_context(ctx)->pipe,
 131                      st_obj->buffer,
 132                      offset, size, data);
 133 }
 134
 135
 136 /**
 137  * Called via glGetBufferSubDataARB().
 138  */
 139 static void
 140 st_bufferobj_get_subdata(struct gl_context *ctx,
 141                          GLintptrARB offset,
 142                          GLsizeiptrARB size,
 143                          GLvoid * data, struct gl_buffer_object *obj)
 144 {
 145    struct st_buffer_object *st_obj = st_buffer_object(obj);
 146
 147    /* we may be called from VBO code, so double-check params here */
 148    ASSERT(offset >= 0);
 149    ASSERT(size >= 0);
 150    ASSERT(offset + size <= obj->Size);
 151
 152    if (!size)
 153       return;
 154
 155    if (!st_obj->buffer) {
 156       /* we probably ran out of memory during buffer allocation */
 157       return;
 158    }
 159
 160    pipe_buffer_read(st_context(ctx)->pipe, st_obj->buffer,
 161                     offset, size, data);
 162 }
 163
 164
 165 /**
 166  * Allocate space for and store data in a buffer object.  Any data that was
 167  * previously stored in the buffer object is lost.  If data is NULL,
 168  * memory will be allocated, but no copy will occur.
 169  * Called via ctx->Driver.BufferData().
 170  * \return GL_TRUE for success, GL_FALSE if out of memory
 171  */
 172 static GLboolean
 173 st_bufferobj_data(struct gl_context *ctx,
 174                   GLenum target,
 175                   GLsizeiptrARB size,
 176                   const GLvoid * data,
 177                   GLenum usage,
 178                   struct gl_buffer_object *obj)
 179 {
 180    struct st_context *st = st_context(ctx);
 181    struct pipe_context *pipe = st->pipe;
 182    struct st_buffer_object *st_obj = st_buffer_object(obj);
 183    unsigned bind, pipe_usage;
 184
 185    st_obj->Base.Size = size;
 186    st_obj->Base.Usage = usage;
 187
 188    switch(target) {
 189    case GL_PIXEL_PACK_BUFFER_ARB:
 190    case GL_PIXEL_UNPACK_BUFFER_ARB:
 191       bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 192       break;
 193    case GL_ARRAY_BUFFER_ARB:
 194       bind = PIPE_BIND_VERTEX_BUFFER;
 195       break;
 196    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 197       bind = PIPE_BIND_INDEX_BUFFER;
 198       break;
 199    case GL_TEXTURE_BUFFER:
 200       bind = PIPE_BIND_SAMPLER_VIEW;
 201       break;
 202    case GL_TRANSFORM_FEEDBACK_BUFFER:
 203       bind = PIPE_BIND_STREAM_OUTPUT;
 204       break;
 205    case GL_UNIFORM_BUFFER:
 206       bind = PIPE_BIND_CONSTANT_BUFFER;
 207       break;
 208    default:
 209       bind = 0;
 210    }
 211
 212    switch (usage) {
 213    case GL_STATIC_DRAW:
 214    case GL_STATIC_READ:
 215    case GL_STATIC_COPY:
 216       pipe_usage = PIPE_USAGE_STATIC;
 217       break;
 218    case GL_DYNAMIC_DRAW:
 219    case GL_DYNAMIC_READ:
 220    case GL_DYNAMIC_COPY:
 221       pipe_usage = PIPE_USAGE_DYNAMIC;
 222       break;
 223    case GL_STREAM_DRAW:
 224    case GL_STREAM_READ:
 225    case GL_STREAM_COPY:
 226       pipe_usage = PIPE_USAGE_STREAM;
 227       break;
 228    default:
 229       pipe_usage = PIPE_USAGE_DEFAULT;
 230    }
 231
 232    pipe_resource_reference( &st_obj->buffer, NULL );
 233
 234    if (ST_DEBUG & DEBUG_BUFFER) {
 235       debug_printf("Create buffer size %lu bind 0x%x\n", size, bind);
 236    }
 237
 238    if (size != 0) {
 239       st_obj->buffer = pipe_buffer_create(pipe->screen, bind,
 240                                           pipe_usage, size);
 241
 242       if (!st_obj->buffer) {
 243          /* out of memory */
 244          st_obj->Base.Size = 0;
 245          return GL_FALSE;
 246       }
 247
 248       if (data)
 249          pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
 250       return GL_TRUE;
 251    }
 252
 253    return GL_TRUE;
 254 }
 255
 256
 257 /**
 258  * Called via glMapBufferRange().
 259  */
 260 static void *
 261 st_bufferobj_map_range(struct gl_context *ctx,
 262                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 263                        struct gl_buffer_object *obj)
 264 {
 265    struct pipe_context *pipe = st_context(ctx)->pipe;
 266    struct st_buffer_object *st_obj = st_buffer_object(obj);
 267    enum pipe_transfer_usage flags = 0x0;
 268
 269    if (access & GL_MAP_WRITE_BIT)
 270       flags |= PIPE_TRANSFER_WRITE;
 271
 272    if (access & GL_MAP_READ_BIT)
 273       flags |= PIPE_TRANSFER_READ;
 274
 275    if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
 276       flags |= PIPE_TRANSFER_FLUSH_EXPLICIT;
 277
 278    if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
 279       flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 280    }
 281    else if (access & GL_MAP_INVALIDATE_RANGE_BIT) {
 282       if (offset == 0 && length == obj->Size)
 283          flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 284       else
 285          flags |= PIPE_TRANSFER_DISCARD_RANGE;
 286    }
 287
 288    if (access & GL_MAP_UNSYNCHRONIZED_BIT)
 289       flags |= PIPE_TRANSFER_UNSYNCHRONIZED;
 290
 291    /* ... other flags ...
 292     */
 293
 294    if (access & MESA_MAP_NOWAIT_BIT)
 295       flags |= PIPE_TRANSFER_DONTBLOCK;
 296
 297    assert(offset >= 0);
 298    assert(length >= 0);
 299    assert(offset < obj->Size);
 300    assert(offset + length <= obj->Size);
 301
 302    obj->Pointer = pipe_buffer_map_range(pipe,
 303                                         st_obj->buffer,
 304                                         offset, length,
 305                                         flags,
 306                                         &st_obj->transfer);
 307    if (obj->Pointer) {
 308       obj->Offset = offset;
 309       obj->Length = length;
 310       obj->AccessFlags = access;
 311    }
 312    else {
 313       st_obj->transfer = NULL;
 314    }
 315
 316    return obj->Pointer;
 317 }
 318
 319
 320 static void
 321 st_bufferobj_flush_mapped_range(struct gl_context *ctx,
 322                                 GLintptr offset, GLsizeiptr length,
 323                                 struct gl_buffer_object *obj)
 324 {
 325    struct pipe_context *pipe = st_context(ctx)->pipe;
 326    struct st_buffer_object *st_obj = st_buffer_object(obj);
 327
 328    /* Subrange is relative to mapped range */
 329    assert(offset >= 0);
 330    assert(length >= 0);
 331    assert(offset + length <= obj->Length);
 332    assert(obj->Pointer);
 333
 334    if (!length)
 335       return;
 336
 337    pipe_buffer_flush_mapped_range(pipe, st_obj->transfer,
 338                                   obj->Offset + offset, length);
 339 }
 340
 341
 342 /**
 343  * Called via glUnmapBufferARB().
 344  */
 345 static GLboolean
 346 st_bufferobj_unmap(struct gl_context *ctx, struct gl_buffer_object *obj)
 347 {
 348    struct pipe_context *pipe = st_context(ctx)->pipe;
 349    struct st_buffer_object *st_obj = st_buffer_object(obj);
 350
 351    if (obj->Length)
 352       pipe_buffer_unmap(pipe, st_obj->transfer);
 353
 354    st_obj->transfer = NULL;
 355    obj->Pointer = NULL;
 356    obj->Offset = 0;
 357    obj->Length = 0;
 358    return GL_TRUE;
 359 }
 360
 361
 362 /**
 363  * Called via glCopyBufferSubData().
 364  */
 365 static void
 366 st_copy_buffer_subdata(struct gl_context *ctx,
 367                        struct gl_buffer_object *src,
 368                        struct gl_buffer_object *dst,
 369                        GLintptr readOffset, GLintptr writeOffset,
 370                        GLsizeiptr size)
 371 {
 372    struct pipe_context *pipe = st_context(ctx)->pipe;
 373    struct st_buffer_object *srcObj = st_buffer_object(src);
 374    struct st_buffer_object *dstObj = st_buffer_object(dst);
 375    struct pipe_box box;
 376
 377    if(!size)
 378       return;
 379
 380    /* buffer should not already be mapped */
 381    assert(!src->Pointer);
 382    assert(!dst->Pointer);
 383
 384    u_box_1d(readOffset, size, &box);
 385
 386    pipe->resource_copy_region(pipe, dstObj->buffer, 0, writeOffset, 0, 0,
 387                               srcObj->buffer, 0, &box);
 388 }
 389
 390
 391 /* TODO: if buffer wasn't created with appropriate usage flags, need
 392  * to recreate it now and copy contents -- or possibly create a
 393  * gallium entrypoint to extend the usage flags and let the driver
 394  * decide if a copy is necessary.
 395  */
 396 void
 397 st_bufferobj_validate_usage(struct st_context *st,
 398                             struct st_buffer_object *obj,
 399                             unsigned usage)
 400 {
 401 }
 402
 403
 404 void
 405 st_init_bufferobject_functions(struct dd_function_table *functions)
 406 {
 407    functions->NewBufferObject = st_bufferobj_alloc;
 408    functions->DeleteBuffer = st_bufferobj_free;
 409    functions->BufferData = st_bufferobj_data;
 410    functions->BufferSubData = st_bufferobj_subdata;
 411    functions->GetBufferSubData = st_bufferobj_get_subdata;
 412    functions->MapBufferRange = st_bufferobj_map_range;
 413    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 414    functions->UnmapBuffer = st_bufferobj_unmap;
 415    functions->CopyBufferSubData = st_copy_buffer_subdata;
 416
 417    /* For GL_APPLE_vertex_array_object */
 418    functions->NewArrayObject = _mesa_new_array_object;
 419    functions->DeleteArrayObject = _mesa_delete_array_object;
 420 }