1/* 2 * Copyright (C) 2011 Apple 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 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 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 PlatformCALayerClient_h 27#define PlatformCALayerClient_h 28 29#include "GraphicsLayer.h" 30 31namespace WebCore { 32 33class FloatRect; 34class GraphicsContext; 35class PlatformCALayer; 36 37class PlatformCALayerClient { 38public: 39 virtual void platformCALayerLayoutSublayersOfLayer(PlatformCALayer*) { } 40 virtual bool platformCALayerRespondsToLayoutChanges() const { return false; } 41 42 virtual void platformCALayerAnimationStarted(CFTimeInterval) { } 43 virtual GraphicsLayer::CompositingCoordinatesOrientation platformCALayerContentsOrientation() const { return GraphicsLayer::CompositingCoordinatesTopDown; } 44 virtual void platformCALayerPaintContents(PlatformCALayer*, GraphicsContext&, const FloatRect& inClip) = 0; 45 virtual bool platformCALayerShowDebugBorders() const { return false; } 46 virtual bool platformCALayerShowRepaintCounter(PlatformCALayer*) const { return false; } 47 virtual int platformCALayerIncrementRepaintCount(PlatformCALayer*) { return 0; } 48 49 virtual bool platformCALayerContentsOpaque() const = 0; 50 virtual bool platformCALayerDrawsContent() const = 0; 51 virtual void platformCALayerLayerDidDisplay(PlatformCALayer*) { } 52 53 virtual void platformCALayerSetNeedsToRevalidateTiles() { } 54 virtual float platformCALayerDeviceScaleFactor() const = 0; 55 virtual float platformCALayerContentsScaleMultiplierForNewTiles(PlatformCALayer*) const { return 1; } 56 57 virtual bool platformCALayerShouldAggressivelyRetainTiles(PlatformCALayer*) const { return false; } 58 virtual bool platformCALayerShouldTemporarilyRetainTileCohorts(PlatformCALayer*) const { return true; } 59 60 virtual bool isCommittingChanges() const { return false; } 61 62protected: 63 virtual ~PlatformCALayerClient() {} 64}; 65 66} 67 68#endif // PlatformCALayerClient_h 69