1/*
2 * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
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 RenderSVGResourceMasker_h
21#define RenderSVGResourceMasker_h
22
23#include "core/rendering/svg/RenderSVGResourceContainer.h"
24#include "core/svg/SVGMaskElement.h"
25#include "core/svg/SVGUnitTypes.h"
26#include "platform/geometry/FloatRect.h"
27#include "platform/geometry/IntSize.h"
28#include "platform/graphics/ImageBuffer.h"
29
30#include "wtf/HashMap.h"
31#include "wtf/OwnPtr.h"
32
33namespace WebCore {
34
35class DisplayList;
36class GraphicsContext;
37
38class RenderSVGResourceMasker FINAL : public RenderSVGResourceContainer {
39public:
40    explicit RenderSVGResourceMasker(SVGMaskElement*);
41    virtual ~RenderSVGResourceMasker();
42
43    virtual const char* renderName() const OVERRIDE { return "RenderSVGResourceMasker"; }
44
45    virtual void removeAllClientsFromCache(bool markForInvalidation = true) OVERRIDE;
46    virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) OVERRIDE;
47    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) OVERRIDE;
48    virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short, const Path*, const RenderSVGShape*) OVERRIDE;
49    FloatRect resourceBoundingBox(const RenderObject*);
50
51    SVGUnitTypes::SVGUnitType maskUnits() const { return toSVGMaskElement(element())->maskUnits()->currentValue()->enumValue(); }
52    SVGUnitTypes::SVGUnitType maskContentUnits() const { return toSVGMaskElement(element())->maskContentUnits()->currentValue()->enumValue(); }
53
54    virtual RenderSVGResourceType resourceType() const OVERRIDE { return s_resourceType; }
55    static const RenderSVGResourceType s_resourceType;
56
57private:
58    void calculateMaskContentRepaintRect();
59    void drawMaskForRenderer(GraphicsContext*, const FloatRect& targetBoundingBox);
60    PassRefPtr<DisplayList> asDisplayList(GraphicsContext*, const AffineTransform&);
61
62    RefPtr<DisplayList> m_maskContentDisplayList;
63    FloatRect m_maskContentBoundaries;
64};
65
66DEFINE_RENDER_SVG_RESOURCE_TYPE_CASTS(RenderSVGResourceMasker, MaskerResourceType);
67
68}
69
70#endif
71