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