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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef SegmentReader_h | 5 #ifndef SegmentReader_h |
6 #define SegmentReader_h | 6 #define SegmentReader_h |
7 | 7 |
8 #include "platform/SharedBuffer.h" | 8 #include "platform/SharedBuffer.h" |
9 #include "third_party/skia/include/core/SkData.h" | 9 #include "third_party/skia/include/core/SkData.h" |
10 #include "third_party/skia/include/core/SkRWBuffer.h" | 10 #include "third_party/skia/include/core/SkRWBuffer.h" |
| 11 #include "third_party/skia/include/core/SkRefCnt.h" |
11 #include "wtf/Noncopyable.h" | 12 #include "wtf/Noncopyable.h" |
12 #include "wtf/PassRefPtr.h" | 13 #include "wtf/PassRefPtr.h" |
13 #include "wtf/ThreadSafeRefCounted.h" | 14 #include "wtf/ThreadSafeRefCounted.h" |
14 | 15 |
15 namespace blink { | 16 namespace blink { |
16 | 17 |
17 // Interface that looks like SharedBuffer. Used by ImageDecoders to use various | 18 // Interface that looks like SharedBuffer. Used by ImageDecoders to use various |
18 // sources of input including: | 19 // sources of input including: |
19 // - SharedBuffer | 20 // - SharedBuffer |
20 // - for when the caller already has a SharedBuffer | 21 // - for when the caller already has a SharedBuffer |
21 // - SkData | 22 // - SkData |
22 // - for when the caller already has an SkData | 23 // - for when the caller already has an SkData |
23 // - SkROBuffer | 24 // - SkROBuffer |
24 // - for when the caller wants to read/write in different threads | 25 // - for when the caller wants to read/write in different threads |
25 // | 26 // |
26 // Unlike SharedBuffer, this is a read-only interface. There is no way to | 27 // Unlike SharedBuffer, this is a read-only interface. There is no way to |
27 // modify the underlying data source. | 28 // modify the underlying data source. |
28 class PLATFORM_EXPORT SegmentReader : public ThreadSafeRefCounted<SegmentReader>
{ | 29 class PLATFORM_EXPORT SegmentReader : public ThreadSafeRefCounted<SegmentReader>
{ |
29 WTF_MAKE_NONCOPYABLE(SegmentReader); | 30 WTF_MAKE_NONCOPYABLE(SegmentReader); |
30 public: | 31 public: |
31 // This version is thread-safe so long as no thread is modifying the | 32 // This version is thread-safe so long as no thread is modifying the |
32 // underlying SharedBuffer. This class does not modify it, so that would | 33 // underlying SharedBuffer. This class does not modify it, so that would |
33 // mean modifying it in another way. | 34 // mean modifying it in another way. |
34 static PassRefPtr<SegmentReader> createFromSharedBuffer(PassRefPtr<SharedBuf
fer>); | 35 static PassRefPtr<SegmentReader> createFromSharedBuffer(PassRefPtr<SharedBuf
fer>); |
35 | 36 |
36 // These versions use thread-safe input, so they are always thread-safe. | 37 // These versions use thread-safe input, so they are always thread-safe. |
37 static PassRefPtr<SegmentReader> createFromSkData(sk_sp<SkData>); | 38 static PassRefPtr<SegmentReader> createFromSkData(sk_sp<SkData>); |
38 static PassRefPtr<SegmentReader> createFromSkROBuffer(PassRefPtr<SkROBuffer>
); | 39 static PassRefPtr<SegmentReader> createFromSkROBuffer(sk_sp<SkROBuffer>); |
39 | 40 |
40 SegmentReader() {} | 41 SegmentReader() {} |
41 virtual ~SegmentReader() {} | 42 virtual ~SegmentReader() {} |
42 virtual size_t size() const = 0; | 43 virtual size_t size() const = 0; |
43 virtual size_t getSomeData(const char*& data, size_t position) const = 0; | 44 virtual size_t getSomeData(const char*& data, size_t position) const = 0; |
44 virtual sk_sp<SkData> getAsSkData() const = 0; | 45 virtual sk_sp<SkData> getAsSkData() const = 0; |
45 }; | 46 }; |
46 | 47 |
47 } // namespace blink | 48 } // namespace blink |
48 #endif // SegmentReader_h | 49 #endif // SegmentReader_h |
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