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