summaryrefslogtreecommitdiffstats
path: root/src/mesa/state_tracker/st_cb_bufferobjects.c
blob: 347dc90b26988e3223ab95668933d35a1f7003ee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
/**************************************************************************
 *
 * Copyright 2007 VMware, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/


/**
 * Functions for pixel buffer objects and vertex/element buffer objects.
 */


#include "main/imports.h"
#include "main/mtypes.h"
#include "main/arrayobj.h"
#include "main/bufferobj.h"

#include "st_context.h"
#include "st_cb_bufferobjects.h"
#include "st_debug.h"

#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "util/u_inlines.h"


/**
 * There is some duplication between mesa's bufferobjects and our
 * bufmgr buffers.  Both have an integer handle and a hashtable to
 * lookup an opaque structure.  It would be nice if the handles and
 * internal structure where somehow shared.
 */
static struct gl_buffer_object *
st_bufferobj_alloc(struct gl_context *ctx, GLuint name, GLenum target)
{
   struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);

   if (!st_obj)
      return NULL;

   _mesa_initialize_buffer_object(ctx, &st_obj->Base, name, target);

   return &st_obj->Base;
}



/**
 * Deallocate/free a vertex/pixel buffer object.
 * Called via glDeleteBuffersARB().
 */
static void
st_bufferobj_free(struct gl_context *ctx, struct gl_buffer_object *obj)
{
   struct st_buffer_object *st_obj = st_buffer_object(obj);

   assert(obj->RefCount == 0);
   assert(st_obj->transfer == NULL);

   if (st_obj->buffer)
      pipe_resource_reference(&st_obj->buffer, NULL);

   free(st_obj->Base.Label);
   free(st_obj);
}



/**
 * Replace data in a subrange of buffer object.  If the data range
 * specified by size + offset extends beyond the end of the buffer or
 * if data is NULL, no copy is performed.
 * Called via glBufferSubDataARB().
 */
static void
st_bufferobj_subdata(struct gl_context *ctx,
		     GLintptrARB offset,
		     GLsizeiptrARB size,
		     const GLvoid * data, struct gl_buffer_object *obj)
{
   struct st_buffer_object *st_obj = st_buffer_object(obj);

   /* we may be called from VBO code, so double-check params here */
   ASSERT(offset >= 0);
   ASSERT(size >= 0);
   ASSERT(offset + size <= obj->Size);

   if (!size)
      return;

   /*
    * According to ARB_vertex_buffer_object specification, if data is null,
    * then the contents of the buffer object's data store is undefined. We just
    * ignore, and leave it unchanged.
    */
   if (!data)
      return;

   if (!st_obj->buffer) {
      /* we probably ran out of memory during buffer allocation */
      return;
   }

   /* Now that transfers are per-context, we don't have to figure out
    * flushing here.  Usually drivers won't need to flush in this case
    * even if the buffer is currently referenced by hardware - they
    * just queue the upload as dma rather than mapping the underlying
    * buffer directly.
    */
   pipe_buffer_write(st_context(ctx)->pipe,
		     st_obj->buffer,
		     offset, size, data);
}


/**
 * Called via glGetBufferSubDataARB().
 */
static void
st_bufferobj_get_subdata(struct gl_context *ctx,
                         GLintptrARB offset,
                         GLsizeiptrARB size,
                         GLvoid * data, struct gl_buffer_object *obj)
{
   struct st_buffer_object *st_obj = st_buffer_object(obj);

   /* we may be called from VBO code, so double-check params here */
   ASSERT(offset >= 0);
   ASSERT(size >= 0);
   ASSERT(offset + size <= obj->Size);

   if (!size)
      return;

   if (!st_obj->buffer) {
      /* we probably ran out of memory during buffer allocation */
      return;
   }

   pipe_buffer_read(st_context(ctx)->pipe, st_obj->buffer,
                    offset, size, data);
}


/**
 * Allocate space for and store data in a buffer object.  Any data that was
 * previously stored in the buffer object is lost.  If data is NULL,
 * memory will be allocated, but no copy will occur.
 * Called via ctx->Driver.BufferData().
 * \return GL_TRUE for success, GL_FALSE if out of memory
 */
static GLboolean
st_bufferobj_data(struct gl_context *ctx,
		  GLenum target,
		  GLsizeiptrARB size,
		  const GLvoid * data,
		  GLenum usage,
                  GLbitfield storageFlags,
		  struct gl_buffer_object *obj)
{
   struct st_context *st = st_context(ctx);
   struct pipe_context *pipe = st->pipe;
   struct st_buffer_object *st_obj = st_buffer_object(obj);
   unsigned bind, pipe_usage;

   if (size && data && st_obj->buffer &&
       st_obj->Base.Size == size &&
       st_obj->Base.Usage == usage &&
       st_obj->Base.StorageFlags == storageFlags) {
      /* Just discard the old contents and write new data.
       * This should be the same as creating a new buffer, but we avoid
       * a lot of validation in Mesa.
       */
      struct pipe_box box;

      u_box_1d(0, size, &box);
      pipe->transfer_inline_write(pipe, st_obj->buffer, 0,
                                  PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE,
                                  &box, data, 0, 0);
      return GL_TRUE;
   }

   st_obj->Base.Size = size;
   st_obj->Base.Usage = usage;
   st_obj->Base.StorageFlags = storageFlags;

   switch (target) {
   case GL_PIXEL_PACK_BUFFER_ARB:
   case GL_PIXEL_UNPACK_BUFFER_ARB:
      bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
      break;
   case GL_ARRAY_BUFFER_ARB:
      bind = PIPE_BIND_VERTEX_BUFFER;
      break;
   case GL_ELEMENT_ARRAY_BUFFER_ARB:
      bind = PIPE_BIND_INDEX_BUFFER;
      break;
   case GL_TEXTURE_BUFFER:
      bind = PIPE_BIND_SAMPLER_VIEW;
      break;
   case GL_TRANSFORM_FEEDBACK_BUFFER:
      bind = PIPE_BIND_STREAM_OUTPUT;
      break;
   case GL_UNIFORM_BUFFER:
      bind = PIPE_BIND_CONSTANT_BUFFER;
      break;
   default:
      bind = 0;
   }

   switch (usage) {
   case GL_STATIC_DRAW:
   case GL_STATIC_READ:
   case GL_STATIC_COPY:
   default:
      pipe_usage = PIPE_USAGE_DEFAULT;
      break;
   case GL_DYNAMIC_DRAW:
   case GL_DYNAMIC_READ:
   case GL_DYNAMIC_COPY:
      pipe_usage = PIPE_USAGE_DYNAMIC;
      break;
   case GL_STREAM_DRAW:
   case GL_STREAM_READ:
   case GL_STREAM_COPY:
      pipe_usage = PIPE_USAGE_STREAM;
      break;
   }

   pipe_resource_reference( &st_obj->buffer, NULL );

   if (ST_DEBUG & DEBUG_BUFFER) {
      debug_printf("Create buffer size %td bind 0x%x\n", size, bind);
   }

   if (size != 0) {
      st_obj->buffer = pipe_buffer_create(pipe->screen, bind,
                                          pipe_usage, size);

      if (!st_obj->buffer) {
         /* out of memory */
         st_obj->Base.Size = 0;
         return GL_FALSE;
      }

      if (data)
         pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
   }

   /* BufferData may change an array or uniform buffer, need to update it */
   st->dirty.st |= ST_NEW_VERTEX_ARRAYS | ST_NEW_UNIFORM_BUFFER;

   return GL_TRUE;
}


/**
 * Called via glMapBufferRange().
 */
static void *
st_bufferobj_map_range(struct gl_context *ctx,
                       GLintptr offset, GLsizeiptr length, GLbitfield access,
                       struct gl_buffer_object *obj)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;
   struct st_buffer_object *st_obj = st_buffer_object(obj);
   enum pipe_transfer_usage flags = 0x0;

   if (access & GL_MAP_WRITE_BIT)
      flags |= PIPE_TRANSFER_WRITE;

   if (access & GL_MAP_READ_BIT)
      flags |= PIPE_TRANSFER_READ;

   if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
      flags |= PIPE_TRANSFER_FLUSH_EXPLICIT;

   if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
      flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
   }
   else if (access & GL_MAP_INVALIDATE_RANGE_BIT) {
      if (offset == 0 && length == obj->Size)
         flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
      else
         flags |= PIPE_TRANSFER_DISCARD_RANGE;
   }

   if (access & GL_MAP_UNSYNCHRONIZED_BIT)
      flags |= PIPE_TRANSFER_UNSYNCHRONIZED;

   /* ... other flags ...
    */

   if (access & MESA_MAP_NOWAIT_BIT)
      flags |= PIPE_TRANSFER_DONTBLOCK;

   assert(offset >= 0);
   assert(length >= 0);
   assert(offset < obj->Size);
   assert(offset + length <= obj->Size);

   obj->Pointer = pipe_buffer_map_range(pipe,
                                        st_obj->buffer,
                                        offset, length,
                                        flags,
                                        &st_obj->transfer);
   if (obj->Pointer) {
      obj->Offset = offset;
      obj->Length = length;
      obj->AccessFlags = access;
   }
   else {
      st_obj->transfer = NULL;
   }

   return obj->Pointer;
}


static void
st_bufferobj_flush_mapped_range(struct gl_context *ctx,
                                GLintptr offset, GLsizeiptr length,
                                struct gl_buffer_object *obj)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;
   struct st_buffer_object *st_obj = st_buffer_object(obj);

   /* Subrange is relative to mapped range */
   assert(offset >= 0);
   assert(length >= 0);
   assert(offset + length <= obj->Length);
   assert(obj->Pointer);

   if (!length)
      return;

   pipe_buffer_flush_mapped_range(pipe, st_obj->transfer,
                                  obj->Offset + offset, length);
}


/**
 * Called via glUnmapBufferARB().
 */
static GLboolean
st_bufferobj_unmap(struct gl_context *ctx, struct gl_buffer_object *obj)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;
   struct st_buffer_object *st_obj = st_buffer_object(obj);

   if (obj->Length)
      pipe_buffer_unmap(pipe, st_obj->transfer);

   st_obj->transfer = NULL;
   obj->Pointer = NULL;
   obj->Offset = 0;
   obj->Length = 0;
   return GL_TRUE;
}


/**
 * Called via glCopyBufferSubData().
 */
static void
st_copy_buffer_subdata(struct gl_context *ctx,
                       struct gl_buffer_object *src,
                       struct gl_buffer_object *dst,
                       GLintptr readOffset, GLintptr writeOffset,
                       GLsizeiptr size)
{
   struct pipe_context *pipe = st_context(ctx)->pipe;
   struct st_buffer_object *srcObj = st_buffer_object(src);
   struct st_buffer_object *dstObj = st_buffer_object(dst);
   struct pipe_box box;

   if (!size)
      return;

   /* buffer should not already be mapped */
   assert(!src->Pointer);
   assert(!dst->Pointer);

   u_box_1d(readOffset, size, &box);

   pipe->resource_copy_region(pipe, dstObj->buffer, 0, writeOffset, 0, 0,
                              srcObj->buffer, 0, &box);
}


/* TODO: if buffer wasn't created with appropriate usage flags, need
 * to recreate it now and copy contents -- or possibly create a
 * gallium entrypoint to extend the usage flags and let the driver
 * decide if a copy is necessary.
 */
void
st_bufferobj_validate_usage(struct st_context *st,
			    struct st_buffer_object *obj,
			    unsigned usage)
{
}


void
st_init_bufferobject_functions(struct dd_function_table *functions)
{
   /* plug in default driver fallbacks (such as for ClearBufferSubData) */
   _mesa_init_buffer_object_functions(functions);

   functions->NewBufferObject = st_bufferobj_alloc;
   functions->DeleteBuffer = st_bufferobj_free;
   functions->BufferData = st_bufferobj_data;
   functions->BufferSubData = st_bufferobj_subdata;
   functions->GetBufferSubData = st_bufferobj_get_subdata;
   functions->MapBufferRange = st_bufferobj_map_range;
   functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
   functions->UnmapBuffer = st_bufferobj_unmap;
   functions->CopyBufferSubData = st_copy_buffer_subdata;

   /* For GL_APPLE_vertex_array_object */
   functions->NewArrayObject = _mesa_new_vao;
   functions->DeleteArrayObject = _mesa_delete_vao;
}