1/* 2 * Copyright (C) 2012 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 * 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. 13 * 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. 24 */ 25 26#ifndef Canvas2DLayerBridge_h 27#define Canvas2DLayerBridge_h 28 29#include "SkDeferredCanvas.h" 30#include "SkImage.h" 31#include "platform/PlatformExport.h" 32#include "platform/geometry/IntSize.h" 33#include "platform/graphics/ImageBufferSurface.h" 34#include "public/platform/WebExternalTextureLayer.h" 35#include "public/platform/WebExternalTextureLayerClient.h" 36#include "public/platform/WebExternalTextureMailbox.h" 37#include "third_party/khronos/GLES2/gl2.h" 38#include "wtf/DoublyLinkedList.h" 39#include "wtf/PassOwnPtr.h" 40#include "wtf/RefCounted.h" 41#include "wtf/RefPtr.h" 42 43class Canvas2DLayerBridgeTest; 44 45namespace blink { 46 47class ImageBuffer; 48class WebGraphicsContext3D; 49class WebGraphicsContext3DProvider; 50 51class PLATFORM_EXPORT Canvas2DLayerBridge : public WebExternalTextureLayerClient, public SkDeferredCanvas::NotificationClient, public DoublyLinkedListNode<Canvas2DLayerBridge>, public RefCounted<Canvas2DLayerBridge> { 52 WTF_MAKE_NONCOPYABLE(Canvas2DLayerBridge); 53public: 54 static PassRefPtr<Canvas2DLayerBridge> create(const IntSize&, OpacityMode, int msaaSampleCount); 55 56 virtual ~Canvas2DLayerBridge(); 57 58 // WebExternalTextureLayerClient implementation. 59 virtual bool prepareMailbox(WebExternalTextureMailbox*, WebExternalBitmap*) OVERRIDE; 60 virtual void mailboxReleased(const WebExternalTextureMailbox&, bool lostResource) OVERRIDE; 61 62 // SkDeferredCanvas::NotificationClient implementation 63 virtual void prepareForDraw() OVERRIDE; 64 virtual void storageAllocatedForRecordingChanged(size_t) OVERRIDE; 65 virtual void flushedDrawCommands() OVERRIDE; 66 virtual void skippedPendingDrawCommands() OVERRIDE; 67 68 // ImageBufferSurface implementation 69 void finalizeFrame(const FloatRect &dirtyRect); 70 void willAccessPixels(); 71 SkCanvas* canvas() const { return m_canvas.get(); } 72 bool checkSurfaceValid(); 73 bool restoreSurface(); 74 WebLayer* layer() const; 75 Platform3DObject getBackingTexture(); 76 bool isAccelerated() const { return true; } 77 void setIsHidden(bool); 78 void setImageBuffer(ImageBuffer* imageBuffer) { m_imageBuffer = imageBuffer; } 79 80 // Methods used by Canvas2DLayerManager 81 virtual size_t freeMemoryIfPossible(size_t); // virtual for mocking 82 virtual void flush(); // virtual for mocking 83 virtual size_t storageAllocatedForRecording(); // virtual for faking 84 size_t bytesAllocated() const { return m_bytesAllocated; } 85 void limitPendingFrames(); 86 void freeReleasedMailbox(); 87 bool hasReleasedMailbox() const; 88 void freeTransientResources(); 89 bool hasTransientResources() const; 90 bool isHidden() { return m_isHidden; } 91 92 void beginDestruction(); 93 94protected: 95 Canvas2DLayerBridge(PassOwnPtr<WebGraphicsContext3DProvider>, PassOwnPtr<SkDeferredCanvas>, PassRefPtr<SkSurface>, int, OpacityMode); 96 void setRateLimitingEnabled(bool); 97 bool releasedMailboxHasExpired(); 98 WebGraphicsContext3D* context(); 99 100 OwnPtr<SkDeferredCanvas> m_canvas; 101 RefPtr<SkSurface> m_surface; 102 OwnPtr<WebExternalTextureLayer> m_layer; 103 OwnPtr<WebGraphicsContext3DProvider> m_contextProvider; 104 ImageBuffer* m_imageBuffer; 105 int m_msaaSampleCount; 106 size_t m_bytesAllocated; 107 bool m_didRecordDrawCommand; 108 bool m_isSurfaceValid; 109 int m_framesPending; 110 int m_framesSinceMailboxRelease; 111 bool m_destructionInProgress; 112 bool m_rateLimitingEnabled; 113 bool m_isHidden; 114 115 friend class WTF::DoublyLinkedListNode<Canvas2DLayerBridge>; 116 friend class ::Canvas2DLayerBridgeTest; 117 Canvas2DLayerBridge* m_next; 118 Canvas2DLayerBridge* m_prev; 119 120 enum MailboxStatus { 121 MailboxInUse, 122 MailboxReleased, 123 MailboxAvailable, 124 }; 125 126 struct MailboxInfo { 127 WebExternalTextureMailbox m_mailbox; 128 RefPtr<SkImage> m_image; 129 MailboxStatus m_status; 130 RefPtr<Canvas2DLayerBridge> m_parentLayerBridge; 131 132 MailboxInfo(const MailboxInfo&); 133 MailboxInfo() {} 134 }; 135 MailboxInfo* createMailboxInfo(); 136 MailboxInfo* releasedMailboxInfo(); 137 138 uint32_t m_lastImageId; 139 Vector<MailboxInfo> m_mailboxes; 140 int m_releasedMailboxInfoIndex; 141}; 142 143} // namespace blink 144 145#endif 146