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 "GraphicsContext.h"
24#include "ImageBuffer.h"
25#include "IntSize.h"
26#include "RenderSVGResourceContainer.h"
27#include "SVGMaskElement.h"
28#include "SVGUnitTypes.h"
29
30#include <wtf/HashMap.h>
31
32namespace WebCore {
33
34struct MaskerData {
35    std::unique_ptr<ImageBuffer> maskImage;
36};
37
38class RenderSVGResourceMasker final : public RenderSVGResourceContainer {
39public:
40    RenderSVGResourceMasker(SVGMaskElement&, PassRef<RenderStyle>);
41    virtual ~RenderSVGResourceMasker();
42
43    SVGMaskElement& maskElement() const { return toSVGMaskElement(RenderSVGResourceContainer::element()); }
44
45    virtual void removeAllClientsFromCache(bool markForInvalidation = true) override;
46    virtual void removeClientFromCache(RenderElement&, bool markForInvalidation = true) override;
47    virtual bool applyResource(RenderElement&, const RenderStyle&, GraphicsContext*&, unsigned short resourceMode) override;
48    virtual FloatRect resourceBoundingBox(const RenderObject&) override;
49
50    SVGUnitTypes::SVGUnitType maskUnits() const { return maskElement().maskUnits(); }
51    SVGUnitTypes::SVGUnitType maskContentUnits() const { return maskElement().maskContentUnits(); }
52
53    virtual RenderSVGResourceType resourceType() const { return s_resourceType; }
54    static RenderSVGResourceType s_resourceType;
55
56private:
57    void element() const = delete;
58
59    virtual const char* renderName() const override { return "RenderSVGResourceMasker"; }
60
61    bool drawContentIntoMaskImage(MaskerData*, ColorSpace, RenderObject*);
62    void calculateMaskContentRepaintRect();
63
64    FloatRect m_maskContentBoundaries;
65    HashMap<RenderObject*, std::unique_ptr<MaskerData>> m_masker;
66};
67
68}
69
70#endif
71