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1 // Copyright (c) 2017 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef SegmentStream_h | |
6 #define SegmentStream_h | |
7 | |
8 #include <algorithm> | |
9 #include "platform/image-decoders/SegmentReader.h" | |
10 #include "platform/wtf/RefPtr.h" | |
11 #include "third_party/skia/include/core/SkStream.h" | |
12 | |
13 namespace blink { | |
14 | |
15 class PLATFORM_EXPORT SegmentStream : public SkStream { | |
16 public: | |
17 SegmentStream(); | |
18 SegmentStream(SegmentStream&& rhs); | |
19 virtual ~SegmentStream() {} | |
20 | |
21 SegmentStream& operator=(SegmentStream&& rhs); | |
22 | |
23 void SetReader(WTF::PassRefPtr<SegmentReader>); | |
24 bool IsCleared() const { return is_cleared_; } | |
scroggo_chromium
2017/07/18 21:10:09
Add a comment describing what this means?
cblume
2017/07/19 23:27:04
Done.
| |
25 | |
26 // From SkStream: | |
27 size_t read(void* buffer, size_t) override; | |
28 size_t peek(void* buffer, size_t) const override; | |
29 bool isAtEnd() const override { return has_read_all_contents_; } | |
30 bool rewind() override; | |
31 bool hasPosition() const override { return true; } | |
32 size_t getPosition() const override { return position_; } | |
33 bool seek(size_t position) override; | |
34 bool move(long offset) override; | |
35 bool hasLength() const override { return true; } | |
36 size_t getLength() const override { | |
37 if (reader_) | |
38 return reader_->size(); | |
39 | |
40 return 0; | |
41 } | |
42 | |
43 private: | |
44 void SetPositionState(size_t new_position); | |
45 | |
46 WTF::RefPtr<SegmentReader> reader_; | |
47 size_t position_ = 0; | |
48 bool has_read_all_contents_ = true; | |
49 bool is_cleared_ = true; | |
50 }; | |
51 | |
52 } // namespace blink | |
53 | |
54 #endif | |
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