1 /* 2 * Copyright (C) 2013 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef DiscardablePixelRef_h 27 #define DiscardablePixelRef_h 28 29 #include "SkBitmap.h" 30 #include "SkPixelRef.h" 31 32 #include "public/platform/WebDiscardableMemory.h" 33 #include "wtf/OwnPtr.h" 34 #include "wtf/PassOwnPtr.h" 35 36 namespace WebCore { 37 38 // Class for allocating the DiscardablePixelRef object. 39 class DiscardablePixelRefAllocator : public SkBitmap::Allocator { 40 // SkBitmap::Allocator implementation. The discardable memory allocated 41 // after this call is locked and will not be purged until next 42 // onUnlockPixels(). 43 virtual bool allocPixelRef(SkBitmap*, SkColorTable*); 44 }; 45 46 // PixelRef object whose memory can be discarded when pixels are unlocked. 47 class DiscardablePixelRef : public SkPixelRef { 48 public: 49 DiscardablePixelRef(PassOwnPtr<SkMutex>); 50 ~DiscardablePixelRef(); 51 52 static bool isDiscardable(SkPixelRef*); 53 bool allocAndLockDiscardableMemory(size_t); 54 55 SK_DECLARE_UNFLATTENABLE_OBJECT() 56 57 protected: 58 // SkPixelRef implementation. 59 virtual void* onLockPixels(SkColorTable**); 60 virtual void onUnlockPixels(); 61 62 private: 63 void* m_lockedMemory; 64 OwnPtr<WebKit::WebDiscardableMemory> m_discardable; 65 OwnPtr<SkMutex> m_mutex; 66 }; 67 68 } // namespace WebCore 69 70 #endif 71
