blob: a0016a3be33663c71691b2cefc240b36f1213e16 (
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
|
// Copyright 2016 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 CC_TILES_DECODED_IMAGE_TRACKER_H_
#define CC_TILES_DECODED_IMAGE_TRACKER_H_
#include <utility>
#include <vector>
#include "base/bind.h"
#include "cc/base/cc_export.h"
#include "cc/tiles/image_controller.h"
class SkImage;
namespace cc {
// This class is the main interface for the rest of the system to request
// decodes. It is responsible for keeping the decodes locked for a number of
// frames, specified as |kNumFramesToLock| in the implementation file.
//
// Note that it is safe to replace ImageController's cache without doing
// anything special with this class, since it retains only ids to the decode
// requests. When defunct ids are then used to try and unlock the image, they
// are silently ignored.
class CC_EXPORT DecodedImageTracker {
public:
DecodedImageTracker();
~DecodedImageTracker();
// Request that the given image be decoded. This issues a callback upon
// completion. The callback takes a bool indicating whether the decode was
// successful or not.
void QueueImageDecode(sk_sp<const SkImage> image,
const base::Callback<void(bool)>& callback);
void NotifyFrameFinished();
private:
friend class TileManager;
friend class DecodedImageTrackerTest;
void set_image_controller(ImageController* controller) {
image_controller_ = controller;
}
void ImageDecodeFinished(const base::Callback<void(bool)>& callback,
ImageController::ImageDecodeRequestId id,
ImageController::ImageDecodeResult result);
ImageController* image_controller_ = nullptr;
std::vector<std::pair<ImageController::ImageDecodeRequestId, int>>
locked_images_;
DISALLOW_COPY_AND_ASSIGN(DecodedImageTracker);
};
} // namespace cc
#endif // CC_TILES_DECODED_IMAGE_TRACKER_H_
|
