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
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/client/share_group.h"
#include <stack>
#include <vector>
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/synchronization/lock.h"
#include "gpu/command_buffer/client/gles2_cmd_helper.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "gpu/command_buffer/client/program_info_manager.h"
#include "gpu/command_buffer/common/id_allocator.h"
namespace gpu {
namespace gles2 {
ShareGroupContextData::IdHandlerData::IdHandlerData() : flush_generation_(0) {}
ShareGroupContextData::IdHandlerData::~IdHandlerData() {}
static_assert(gpu::kInvalidResource == 0,
"GL expects kInvalidResource to be 0");
// The standard id handler.
class IdHandler : public IdHandlerInterface {
public:
IdHandler() { }
~IdHandler() override {}
// Overridden from IdHandlerInterface.
void MakeIds(GLES2Implementation* /* gl_impl */,
GLuint id_offset,
GLsizei n,
GLuint* ids) override {
base::AutoLock auto_lock(lock_);
if (id_offset == 0) {
for (GLsizei ii = 0; ii < n; ++ii) {
ids[ii] = id_allocator_.AllocateID();
}
} else {
for (GLsizei ii = 0; ii < n; ++ii) {
ids[ii] = id_allocator_.AllocateIDAtOrAbove(id_offset);
id_offset = ids[ii] + 1;
}
}
}
// Overridden from IdHandlerInterface.
bool FreeIds(GLES2Implementation* gl_impl,
GLsizei n,
const GLuint* ids,
DeleteFn delete_fn) override {
base::AutoLock auto_lock(lock_);
for (GLsizei ii = 0; ii < n; ++ii) {
id_allocator_.FreeID(ids[ii]);
}
(gl_impl->*delete_fn)(n, ids);
// We need to ensure that the delete call is evaluated on the service side
// before any other contexts issue commands using these client ids.
gl_impl->helper()->CommandBufferHelper::OrderingBarrier();
return true;
}
// Overridden from IdHandlerInterface.
bool MarkAsUsedForBind(GLES2Implementation* gl_impl,
GLenum target,
GLuint id,
BindFn bind_fn) override {
base::AutoLock auto_lock(lock_);
bool result = id ? id_allocator_.MarkAsUsed(id) : true;
(gl_impl->*bind_fn)(target, id);
return result;
}
bool MarkAsUsedForBind(GLES2Implementation* gl_impl,
GLenum target,
GLuint index,
GLuint id,
BindIndexedFn bind_fn) override {
base::AutoLock auto_lock(lock_);
bool result = id ? id_allocator_.MarkAsUsed(id) : true;
(gl_impl->*bind_fn)(target, index, id);
return result;
}
bool MarkAsUsedForBind(GLES2Implementation* gl_impl,
GLenum target,
GLuint index,
GLuint id,
GLintptr offset,
GLsizeiptr size,
BindIndexedRangeFn bind_fn) override {
base::AutoLock auto_lock(lock_);
bool result = id ? id_allocator_.MarkAsUsed(id) : true;
(gl_impl->*bind_fn)(target, index, id, offset, size);
return result;
}
void FreeContext(GLES2Implementation* gl_impl) override {}
private:
base::Lock lock_;
IdAllocator id_allocator_;
};
// An id handler that requires Gen before Bind.
class StrictIdHandler : public IdHandlerInterface {
public:
explicit StrictIdHandler(int id_namespace) : id_namespace_(id_namespace) {}
~StrictIdHandler() override {}
// Overridden from IdHandler.
void MakeIds(GLES2Implementation* gl_impl,
GLuint /* id_offset */,
GLsizei n,
GLuint* ids) override {
base::AutoLock auto_lock(lock_);
// Collect pending FreeIds from other flush_generation.
CollectPendingFreeIds(gl_impl);
for (GLsizei ii = 0; ii < n; ++ii) {
if (!free_ids_.empty()) {
// Allocate a previously freed Id.
ids[ii] = free_ids_.top();
free_ids_.pop();
// Record kIdInUse state.
DCHECK(id_states_[ids[ii] - 1] == kIdFree);
id_states_[ids[ii] - 1] = kIdInUse;
} else {
// Allocate a new Id.
id_states_.push_back(kIdInUse);
ids[ii] = id_states_.size();
}
}
}
// Overridden from IdHandler.
bool FreeIds(GLES2Implementation* gl_impl,
GLsizei n,
const GLuint* ids,
DeleteFn delete_fn) override {
// Delete stub must run before CollectPendingFreeIds.
(gl_impl->*delete_fn)(n, ids);
{
base::AutoLock auto_lock(lock_);
// Collect pending FreeIds from other flush_generation.
CollectPendingFreeIds(gl_impl);
// Save Ids to free in a later flush_generation.
ShareGroupContextData::IdHandlerData* ctxt_data =
gl_impl->share_group_context_data()->id_handler_data(id_namespace_);
for (GLsizei ii = 0; ii < n; ++ii) {
GLuint id = ids[ii];
if (id != 0) {
// Save freed Id for later.
DCHECK(id_states_[id - 1] == kIdInUse);
id_states_[id - 1] = kIdPendingFree;
ctxt_data->freed_ids_.push_back(id);
}
}
}
return true;
}
// Overridden from IdHandler.
bool MarkAsUsedForBind(GLES2Implementation* gl_impl,
GLenum target,
GLuint id,
BindFn bind_fn) override {
#ifndef NDEBUG
if (id != 0) {
base::AutoLock auto_lock(lock_);
DCHECK(id_states_[id - 1] == kIdInUse);
}
#endif
// StrictIdHandler is used if |bind_generates_resource| is false. In that
// case, |bind_fn| will not use Flush() after helper->Bind*(), so it is OK
// to call |bind_fn| without holding the lock.
(gl_impl->*bind_fn)(target, id);
return true;
}
bool MarkAsUsedForBind(GLES2Implementation* gl_impl,
GLenum target,
GLuint index,
GLuint id,
BindIndexedFn bind_fn) override {
#ifndef NDEBUG
if (id != 0) {
base::AutoLock auto_lock(lock_);
DCHECK(id_states_[id - 1] == kIdInUse);
}
#endif
// StrictIdHandler is used if |bind_generates_resource| is false. In that
// case, |bind_fn| will not use Flush() after helper->Bind*(), so it is OK
// to call |bind_fn| without holding the lock.
(gl_impl->*bind_fn)(target, index, id);
return true;
}
bool MarkAsUsedForBind(GLES2Implementation* gl_impl,
GLenum target,
GLuint index,
GLuint id,
GLintptr offset,
GLsizeiptr size,
BindIndexedRangeFn bind_fn) override {
#ifndef NDEBUG
if (id != 0) {
base::AutoLock auto_lock(lock_);
DCHECK(id_states_[id - 1] == kIdInUse);
}
#endif
// StrictIdHandler is used if |bind_generates_resource| is false. In that
// case, |bind_fn| will not use Flush() after helper->Bind*(), so it is OK
// to call |bind_fn| without holding the lock.
(gl_impl->*bind_fn)(target, index, id, offset, size);
return true;
}
// Overridden from IdHandlerInterface.
void FreeContext(GLES2Implementation* gl_impl) override {
base::AutoLock auto_lock(lock_);
CollectPendingFreeIds(gl_impl);
}
private:
enum IdState { kIdFree, kIdPendingFree, kIdInUse };
void CollectPendingFreeIds(GLES2Implementation* gl_impl) {
uint32 flush_generation = gl_impl->helper()->flush_generation();
ShareGroupContextData::IdHandlerData* ctxt_data =
gl_impl->share_group_context_data()->id_handler_data(id_namespace_);
if (ctxt_data->flush_generation_ != flush_generation) {
ctxt_data->flush_generation_ = flush_generation;
for (uint32 ii = 0; ii < ctxt_data->freed_ids_.size(); ++ii) {
const GLuint id = ctxt_data->freed_ids_[ii];
DCHECK(id_states_[id - 1] == kIdPendingFree);
id_states_[id - 1] = kIdFree;
free_ids_.push(id);
}
ctxt_data->freed_ids_.clear();
}
}
int id_namespace_;
base::Lock lock_;
std::vector<uint8> id_states_;
std::stack<uint32> free_ids_;
};
// An id handler for ids that are never reused.
class NonReusedIdHandler : public IdHandlerInterface {
public:
NonReusedIdHandler() : last_id_(0) {}
~NonReusedIdHandler() override {}
// Overridden from IdHandlerInterface.
void MakeIds(GLES2Implementation* /* gl_impl */,
GLuint id_offset,
GLsizei n,
GLuint* ids) override {
base::AutoLock auto_lock(lock_);
for (GLsizei ii = 0; ii < n; ++ii) {
ids[ii] = ++last_id_ + id_offset;
}
}
// Overridden from IdHandlerInterface.
bool FreeIds(GLES2Implementation* gl_impl,
GLsizei n,
const GLuint* ids,
DeleteFn delete_fn) override {
// Ids are never freed.
(gl_impl->*delete_fn)(n, ids);
return true;
}
// Overridden from IdHandlerInterface.
bool MarkAsUsedForBind(GLES2Implementation* /* gl_impl */,
GLenum /* target */,
GLuint /* id */,
BindFn /* bind_fn */) override {
// This is only used for Shaders and Programs which have no bind.
return false;
}
bool MarkAsUsedForBind(GLES2Implementation* /* gl_impl */,
GLenum /* target */,
GLuint /* index */,
GLuint /* id */,
BindIndexedFn /* bind_fn */) override {
// This is only used for Shaders and Programs which have no bind.
return false;
}
bool MarkAsUsedForBind(GLES2Implementation* /* gl_impl */,
GLenum /* target */,
GLuint /* index */,
GLuint /* id */,
GLintptr /* offset */,
GLsizeiptr /* size */,
BindIndexedRangeFn /* bind_fn */) override {
// This is only used for Shaders and Programs which have no bind.
return false;
}
void FreeContext(GLES2Implementation* gl_impl) override {}
private:
base::Lock lock_;
GLuint last_id_;
};
class RangeIdHandler : public RangeIdHandlerInterface {
public:
RangeIdHandler() {}
void MakeIdRange(GLES2Implementation* /*gl_impl*/,
GLsizei n,
GLuint* first_id) override {
base::AutoLock auto_lock(lock_);
*first_id = id_allocator_.AllocateIDRange(n);
}
void FreeIdRange(GLES2Implementation* gl_impl,
const GLuint first_id,
GLsizei range,
DeleteRangeFn delete_fn) override {
base::AutoLock auto_lock(lock_);
DCHECK(range > 0);
id_allocator_.FreeIDRange(first_id, range);
(gl_impl->*delete_fn)(first_id, range);
gl_impl->helper()->CommandBufferHelper::OrderingBarrier();
}
void FreeContext(GLES2Implementation* gl_impl) override {}
private:
base::Lock lock_;
IdAllocator id_allocator_;
};
ShareGroup::ShareGroup(bool bind_generates_resource)
: bind_generates_resource_(bind_generates_resource) {
if (bind_generates_resource) {
for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
if (i == id_namespaces::kProgramsAndShaders) {
id_handlers_[i].reset(new NonReusedIdHandler());
} else {
id_handlers_[i].reset(new IdHandler());
}
}
} else {
for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
if (i == id_namespaces::kProgramsAndShaders) {
id_handlers_[i].reset(new NonReusedIdHandler());
} else {
id_handlers_[i].reset(new StrictIdHandler(i));
}
}
}
program_info_manager_.reset(new ProgramInfoManager);
for (auto& range_id_handler : range_id_handlers_) {
range_id_handler.reset(new RangeIdHandler());
}
}
void ShareGroup::set_program_info_manager(ProgramInfoManager* manager) {
program_info_manager_.reset(manager);
}
ShareGroup::~ShareGroup() {}
} // namespace gles2
} // namespace gpu
|