blob: 54097d315fb04355d6dee409b87cf6bca0f6a317 (
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
|
// Copyright 2015 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.
#ifndef COMPONENTS_EXO_BUFFER_H_
#define COMPONENTS_EXO_BUFFER_H_
#include <memory>
#include "base/callback.h"
#include "base/cancelable_callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "cc/resources/transferable_resource.h"
#include "ui/gfx/geometry/size.h"
namespace base {
namespace trace_event {
class TracedValue;
}
}
namespace gfx {
class GpuMemoryBuffer;
}
namespace exo {
class CompositorFrameSinkHolder;
// This class provides the content for a Surface. The mechanism by which a
// client provides and updates the contents is the responsibility of the client
// and not defined as part of this class.
class Buffer : public base::SupportsWeakPtr<Buffer> {
public:
explicit Buffer(std::unique_ptr<gfx::GpuMemoryBuffer> gpu_memory_buffer);
Buffer(std::unique_ptr<gfx::GpuMemoryBuffer> gpu_memory_buffer,
unsigned texture_target,
unsigned query_type,
bool use_zero_copy,
bool is_overlay_candidate);
~Buffer();
// Set the callback to run when the buffer is no longer used by the
// compositor. The client is free to re-use or destroy this buffer and
// its backing storage after this has been called.
void set_release_callback(const base::Closure& release_callback) {
release_callback_ = release_callback;
}
// This function can be used to acquire a texture mailbox for the contents of
// buffer. Returns a release callback on success. The release callback should
// be called before a new texture mailbox can be acquired unless
// |non_client_usage| is true.
bool ProduceTransferableResource(
CompositorFrameSinkHolder* compositor_frame_sink_holder,
cc::ResourceId resource_id,
bool secure_output_only,
bool client_usage,
cc::TransferableResource* resource);
// This should be called when the buffer is attached to a Surface.
void OnAttach();
// This should be called when the buffer is detached from a surface.
void OnDetach();
// Returns the size of the buffer.
gfx::Size GetSize() const;
// Returns the format of the buffer.
gfx::BufferFormat GetFormat() const;
// Returns a trace value representing the state of the buffer.
std::unique_ptr<base::trace_event::TracedValue> AsTracedValue() const;
private:
class Texture;
// This should be called when buffer is released and will notify the
// client that buffer has been released.
void Release();
// This is used by ProduceTextureMailbox() to produce a release callback
// that releases a texture so it can be destroyed or reused.
void ReleaseTexture(std::unique_ptr<Texture> texture);
// This is used by ProduceTextureMailbox() to produce a release callback
// that releases the buffer contents referenced by a texture before the
// texture is destroyed or reused.
void ReleaseContentsTexture(std::unique_ptr<Texture> texture,
const base::Closure& callback);
// Notifies the client that buffer has been released if no longer attached
// to a surface.
void ReleaseContents();
// The GPU memory buffer that contains the contents of this buffer.
std::unique_ptr<gfx::GpuMemoryBuffer> gpu_memory_buffer_;
// Texture target that must be used when creating a texture for buffer.
const unsigned texture_target_;
// Query type that must be used when releasing buffer from a texture.
const unsigned query_type_;
// True if zero copy is used when producing a texture mailbox for buffer.
const bool use_zero_copy_;
// True if this buffer is an overlay candidate.
const bool is_overlay_candidate_;
// This keeps track of how many Surfaces the buffer is attached to.
unsigned attach_count_ = 0;
// The last used texture. ProduceTransferableResource() will use this
// instead of creating a new texture when possible.
std::unique_ptr<Texture> texture_;
// The last used contents texture. ProduceTransferableResource() will use this
// instead of creating a new texture when possible.
std::unique_ptr<Texture> contents_texture_;
// The client release callback.
base::Closure release_callback_;
// Cancelable release contents callback. This is set when a release callback
// is pending.
base::CancelableClosure release_contents_callback_;
DISALLOW_COPY_AND_ASSIGN(Buffer);
};
} // namespace exo
#endif // COMPONENTS_EXO_BUFFER_H_
|
