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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 "third_party/skia/include/core/SkStream.h" |
| 11 #include "wtf/RefPtr.h" |
| 12 |
| 13 namespace blink { |
| 14 |
| 15 class PLATFORM_EXPORT SegmentStream : public SkStream { |
| 16 public: |
| 17 SegmentStream(); |
| 18 virtual ~SegmentStream() {} |
| 19 |
| 20 void SetReader(SegmentReader*, bool all_contents_received); |
| 21 bool IsCleared() const { return is_cleared_; } |
| 22 |
| 23 // From SkStream: |
| 24 size_t read(void* buffer, size_t) override; |
| 25 size_t peek(void* buffer, size_t) const override; |
| 26 bool isAtEnd() const override { return has_read_all_contents_; } |
| 27 bool rewind() override; |
| 28 bool hasPosition() const override { return true; } |
| 29 size_t getPosition() const override { return position_; } |
| 30 bool seek(size_t position) override; |
| 31 bool move(long offset) override; |
| 32 bool hasLength() const override { return true; } |
| 33 size_t getLength() const override { |
| 34 if (reader_) |
| 35 return reader_->size(); |
| 36 |
| 37 return 0; |
| 38 } |
| 39 |
| 40 private: |
| 41 WTF::RefPtr<SegmentReader> reader_; |
| 42 size_t position_; |
| 43 bool has_read_all_contents_; |
| 44 bool is_cleared_; |
| 45 }; |
| 46 |
| 47 } // namespace blink |
| 48 |
| 49 #endif |
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