1/*
2 Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public
6 License as published by the Free Software Foundation; either
7 version 2 of the License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public License
15 along with this library; see the file COPYING.LIB.  If not, write to
16 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 Boston, MA 02110-1301, USA.
18 */
19
20#ifndef TextureMapperBackingStore_h
21#define TextureMapperBackingStore_h
22
23#if USE(TEXTURE_MAPPER)
24
25#include "FloatRect.h"
26#include "Image.h"
27#include "TextureMapper.h"
28#include "TextureMapperPlatformLayer.h"
29#include <wtf/RefPtr.h>
30
31#if USE(GRAPHICS_SURFACE)
32#include "GraphicsSurface.h"
33#endif
34
35namespace WebCore {
36
37class GraphicsLayer;
38
39class TextureMapperBackingStore : public TextureMapperPlatformLayer, public RefCounted<TextureMapperBackingStore> {
40public:
41    virtual PassRefPtr<BitmapTexture> texture() const = 0;
42    virtual void paintToTextureMapper(TextureMapper*, const FloatRect&, const TransformationMatrix&, float) = 0;
43    virtual void drawRepaintCounter(TextureMapper*, int /* repaintCount */, const Color&, const FloatRect&, const TransformationMatrix&) { }
44    virtual ~TextureMapperBackingStore() { }
45
46protected:
47    static unsigned calculateExposedTileEdges(const FloatRect& totalRect, const FloatRect& tileRect);
48};
49
50}
51#endif
52
53#endif // TextureMapperBackingStore_h
54