| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef DiscardablePixelRef_h |
| #define DiscardablePixelRef_h |
| |
| #include "SkBitmap.h" |
| #include "SkPixelRef.h" |
| |
| #include "public/platform/WebDiscardableMemory.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/PassOwnPtr.h" |
| |
| namespace WebCore { |
| |
| // Class for allocating the DiscardablePixelRef object. |
| class DiscardablePixelRefAllocator : public SkBitmap::Allocator { |
| // SkBitmap::Allocator implementation. The discardable memory allocated |
| // after this call is locked and will not be purged until next |
| // onUnlockPixels(). |
| virtual bool allocPixelRef(SkBitmap*, SkColorTable*); |
| }; |
| |
| // PixelRef object whose memory can be discarded when pixels are unlocked. |
| class DiscardablePixelRef : public SkPixelRef { |
| public: |
| DiscardablePixelRef(PassOwnPtr<SkMutex>); |
| ~DiscardablePixelRef(); |
| |
| static bool isDiscardable(SkPixelRef*); |
| bool allocAndLockDiscardableMemory(size_t); |
| |
| SK_DECLARE_UNFLATTENABLE_OBJECT() |
| |
| protected: |
| // SkPixelRef implementation. |
| virtual void* onLockPixels(SkColorTable**); |
| virtual void onUnlockPixels(); |
| |
| private: |
| void* m_lockedMemory; |
| OwnPtr<blink::WebDiscardableMemory> m_discardable; |
| OwnPtr<SkMutex> m_mutex; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif |