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
|
// 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.
// This class is an implementation of the ChromotingView for Pepper. It is
// callable only on the Pepper thread.
#ifndef REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_
#define REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_
#include <list>
#include "base/memory/weak_ptr.h"
#include "ppapi/cpp/graphics_2d.h"
#include "ppapi/cpp/view.h"
#include "ppapi/cpp/point.h"
#include "remoting/client/frame_consumer.h"
namespace base {
class Time;
} // namespace base
namespace remoting {
class ChromotingInstance;
class ClientContext;
class FrameProducer;
class PepperView : public FrameConsumer,
public base::SupportsWeakPtr<PepperView> {
public:
// Constructs a PepperView for the |instance|. The |instance|, |context|
// and |producer| must outlive this class.
PepperView(ChromotingInstance* instance,
ClientContext* context,
FrameProducer* producer);
virtual ~PepperView();
// FrameConsumer implementation.
virtual void ApplyBuffer(const SkISize& view_size,
const SkIRect& clip_area,
pp::ImageData* buffer,
const SkRegion& region) OVERRIDE;
virtual void ReturnBuffer(pp::ImageData* buffer) OVERRIDE;
virtual void SetSourceSize(const SkISize& source_size,
const SkIPoint& dpi) OVERRIDE;
// Updates the PepperView's size & clipping area, taking into account the
// DIP-to-device scale factor.
void SetView(const pp::View& view);
// Returns the dimensions of the most recently displayed frame, in pixels.
const SkISize& get_source_size() const {
return source_size_;
}
// Return the dimensions of the view in Density Independent Pixels (DIPs).
// Note that there may be multiple device pixels per DIP.
const SkISize& get_view_size_dips() const {
return dips_size_;
}
private:
// Allocates a new frame buffer to supply to the FrameProducer to render into.
// Returns NULL if the maximum number of buffers has already been allocated.
pp::ImageData* AllocateBuffer();
// Frees a frame buffer previously allocated by AllocateBuffer.
void FreeBuffer(pp::ImageData* buffer);
// Allocates buffers and passes them to the FrameProducer to render into until
// the maximum number of buffers are in-flight.
void InitiateDrawing();
// Renders the parts of |buffer| identified by |region| to the view. If the
// clip area of the view has changed since the buffer was generated then
// FrameProducer is supplied the missed parts of |region|. The FrameProducer
// will be supplied a new buffer when FlushBuffer() completes.
void FlushBuffer(const SkIRect& clip_area,
pp::ImageData* buffer,
const SkRegion& region);
// Handles completion of FlushBuffer(), triggering a new buffer to be
// returned to FrameProducer for rendering.
void OnFlushDone(base::Time paint_start, pp::ImageData* buffer, int result);
// Reference to the creating plugin instance. Needed for interacting with
// pepper. Marking explicitly as const since it must be initialized at
// object creation, and never change.
ChromotingInstance* const instance_;
// Context should be constant for the lifetime of the plugin.
ClientContext* const context_;
pp::Graphics2D graphics2d_;
FrameProducer* producer_;
// List of allocated image buffers.
std::list<pp::ImageData*> buffers_;
// Queued buffer to paint, with clip area and dirty region in device pixels.
pp::ImageData* merge_buffer_;
SkIRect merge_clip_area_;
SkRegion merge_region_;
// View size in Density Independent Pixels (DIPs).
SkISize dips_size_;
// Scale factor from DIPs to device pixels.
float dips_to_device_scale_;
// View size in output pixels. This is the size at which FrameProducer must
// render frames. It usually matches the DIPs size of the view, but may match
// the size in device pixels when scaling is in effect, to reduce artefacts.
SkISize view_size_;
// Scale factor from output pixels to device pixels.
float dips_to_view_scale_;
// Visible area of the view, in output pixels.
SkIRect clip_area_;
// Size of the most recent source frame in pixels.
SkISize source_size_;
// Resolution of the most recent source frame dots-per-inch.
SkIPoint source_dpi_;
// True if there is already a Flush() pending on the Graphics2D context.
bool flush_pending_;
// True after Initialize() has been called, until TearDown().
bool is_initialized_;
// True after the first call to ApplyBuffer().
bool frame_received_;
DISALLOW_COPY_AND_ASSIGN(PepperView);
};
} // namespace remoting
#endif // REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_
|
