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
|
// Copyright 2014 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 "content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h"
#include "base/bind.h"
#include "base/numerics/safe_math.h"
#include "ui/gl/gl_bindings.h"
namespace content {
GpuMemoryBufferImplSharedMemory::GpuMemoryBufferImplSharedMemory(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
const DestructionCallback& callback,
scoped_ptr<base::SharedMemory> shared_memory)
: GpuMemoryBufferImpl(id, size, format, callback),
shared_memory_(shared_memory.Pass()) {
DCHECK(IsFormatSupported(format));
DCHECK(IsSizeValidForFormat(size, format));
}
GpuMemoryBufferImplSharedMemory::~GpuMemoryBufferImplSharedMemory() {
}
// static
scoped_ptr<GpuMemoryBufferImpl> GpuMemoryBufferImplSharedMemory::Create(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
const DestructionCallback& callback) {
size_t buffer_size = 0u;
if (!BufferSizeInBytes(size, format, &buffer_size))
return scoped_ptr<GpuMemoryBufferImpl>();
scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory());
if (!shared_memory->CreateAndMapAnonymous(buffer_size))
return scoped_ptr<GpuMemoryBufferImpl>();
return make_scoped_ptr(new GpuMemoryBufferImplSharedMemory(
id, size, format, callback, shared_memory.Pass()));
}
// static
gfx::GpuMemoryBufferHandle
GpuMemoryBufferImplSharedMemory::AllocateForChildProcess(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
base::ProcessHandle child_process) {
size_t buffer_size = 0u;
if (!BufferSizeInBytes(size, format, &buffer_size))
return gfx::GpuMemoryBufferHandle();
base::SharedMemory shared_memory;
if (!shared_memory.CreateAnonymous(buffer_size))
return gfx::GpuMemoryBufferHandle();
gfx::GpuMemoryBufferHandle handle;
handle.type = gfx::SHARED_MEMORY_BUFFER;
handle.id = id;
shared_memory.GiveToProcess(child_process, &handle.handle);
return handle;
}
// static
scoped_ptr<GpuMemoryBufferImpl>
GpuMemoryBufferImplSharedMemory::CreateFromHandle(
const gfx::GpuMemoryBufferHandle& handle,
const gfx::Size& size,
gfx::BufferFormat format,
const DestructionCallback& callback) {
if (!base::SharedMemory::IsHandleValid(handle.handle))
return scoped_ptr<GpuMemoryBufferImpl>();
size_t buffer_size = 0u;
if (!BufferSizeInBytes(size, format, &buffer_size))
return scoped_ptr<GpuMemoryBufferImpl>();
scoped_ptr<base::SharedMemory> shared_memory(
new base::SharedMemory(handle.handle, false));
if (!shared_memory->Map(buffer_size))
return scoped_ptr<GpuMemoryBufferImpl>();
return make_scoped_ptr<GpuMemoryBufferImpl>(
new GpuMemoryBufferImplSharedMemory(
handle.id,
size,
format,
callback,
shared_memory.Pass()));
}
// static
bool GpuMemoryBufferImplSharedMemory::IsFormatSupported(
gfx::BufferFormat format) {
switch (format) {
case gfx::BufferFormat::ATC:
case gfx::BufferFormat::ATCIA:
case gfx::BufferFormat::DXT1:
case gfx::BufferFormat::DXT5:
case gfx::BufferFormat::ETC1:
case gfx::BufferFormat::R_8:
case gfx::BufferFormat::RGBA_4444:
case gfx::BufferFormat::RGBA_8888:
case gfx::BufferFormat::BGRA_8888:
case gfx::BufferFormat::YUV_420:
return true;
case gfx::BufferFormat::RGBX_8888:
return false;
}
NOTREACHED();
return false;
}
// static
bool GpuMemoryBufferImplSharedMemory::IsUsageSupported(gfx::BufferUsage usage) {
switch (usage) {
case gfx::BufferUsage::MAP:
case gfx::BufferUsage::PERSISTENT_MAP:
return true;
case gfx::BufferUsage::SCANOUT:
return false;
}
NOTREACHED();
return false;
}
// static
bool GpuMemoryBufferImplSharedMemory::IsSizeValidForFormat(
const gfx::Size& size,
gfx::BufferFormat format) {
switch (format) {
case gfx::BufferFormat::ATC:
case gfx::BufferFormat::ATCIA:
case gfx::BufferFormat::DXT1:
case gfx::BufferFormat::DXT5:
case gfx::BufferFormat::ETC1:
// Compressed images must have a width and height that's evenly divisible
// by the block size.
return size.width() % 4 == 0 && size.height() % 4 == 0;
case gfx::BufferFormat::R_8:
case gfx::BufferFormat::RGBA_4444:
case gfx::BufferFormat::RGBA_8888:
case gfx::BufferFormat::BGRA_8888:
case gfx::BufferFormat::RGBX_8888:
return true;
case gfx::BufferFormat::YUV_420: {
size_t num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format);
for (size_t i = 0; i < num_planes; ++i) {
size_t factor = SubsamplingFactor(format, i);
if (size.width() % factor || size.height() % factor)
return false;
}
return true;
}
}
NOTREACHED();
return false;
}
bool GpuMemoryBufferImplSharedMemory::Map(void** data) {
DCHECK(!mapped_);
size_t offset = 0;
size_t num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format_);
for (size_t i = 0; i < num_planes; ++i) {
data[i] = reinterpret_cast<uint8*>(shared_memory_->memory()) + offset;
size_t row_size_in_bytes = 0;
bool valid_row_size =
RowSizeInBytes(size_.width(), format_, i, &row_size_in_bytes);
DCHECK(valid_row_size);
offset +=
row_size_in_bytes * (size_.height() / SubsamplingFactor(format_, i));
}
mapped_ = true;
return true;
}
void GpuMemoryBufferImplSharedMemory::Unmap() {
DCHECK(mapped_);
mapped_ = false;
}
void GpuMemoryBufferImplSharedMemory::GetStride(int* stride) const {
size_t num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format_);
for (size_t i = 0; i < num_planes; ++i) {
size_t row_size_in_bytes = 0;
bool valid_row_size =
RowSizeInBytes(size_.width(), format_, i, &row_size_in_bytes);
DCHECK(valid_row_size);
stride[i] = row_size_in_bytes;
}
}
gfx::GpuMemoryBufferHandle GpuMemoryBufferImplSharedMemory::GetHandle() const {
gfx::GpuMemoryBufferHandle handle;
handle.type = gfx::SHARED_MEMORY_BUFFER;
handle.id = id_;
handle.handle = shared_memory_->handle();
return handle;
}
} // namespace content
|