2 * Copyright (C) 2012 Google Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #ifndef LazyDecodingPixelRef_h
27 #define LazyDecodingPixelRef_h
29 #include "SkFlattenableBuffers.h"
30 #include "SkPixelRef.h"
34 #include "platform/PlatformInstrumentation.h"
35 #include "skia/ext/lazy_pixel_ref.h"
37 #include "wtf/RefPtr.h"
39 using skia::LazyPixelRef;
45 class ImageFrameGenerator;
46 class ScaledImageFragment;
48 class LazyDecodingPixelRef FINAL : public LazyPixelRef {
50 LazyDecodingPixelRef(const SkImageInfo&, PassRefPtr<ImageFrameGenerator>, size_t index);
51 virtual ~LazyDecodingPixelRef();
53 SK_DECLARE_UNFLATTENABLE_OBJECT()
55 PassRefPtr<ImageFrameGenerator> frameGenerator() const { return m_frameGenerator; }
56 size_t frameIndex() const { return m_frameIndex; }
58 // Returns true if the image might already be decoded in the cache.
59 // Optimistic version of PrepareToDecode; requires less locking.
60 virtual bool MaybeDecoded() OVERRIDE;
61 virtual bool PrepareToDecode(const LazyPixelRef::PrepareParams&) OVERRIDE;
62 virtual void Decode() OVERRIDE;
65 // SkPixelRef implementation.
66 virtual bool onNewLockPixels(LockRec*) OVERRIDE;
67 virtual void onUnlockPixels() OVERRIDE;
68 virtual bool onLockPixelsAreWritable() const OVERRIDE;
70 virtual SkData* onRefEncodedData() OVERRIDE;
73 RefPtr<ImageFrameGenerator> m_frameGenerator;
76 const ScaledImageFragment* m_lockedImageResource;
77 PlatformInstrumentation::LazyPixelRefTracker m_objectTracker;
80 } // namespace WebCore
82 #endif // LazyDecodingPixelRef_h_