1/*
2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
5 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
6 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB.  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24#ifndef RenderSVGResourceFilter_h
25#define RenderSVGResourceFilter_h
26
27#if ENABLE(FILTERS)
28#include "ImageBuffer.h"
29#include "RenderSVGResourceContainer.h"
30#include "SVGFilter.h"
31#include "SVGFilterBuilder.h"
32#include "SVGFilterElement.h"
33#include "SVGUnitTypes.h"
34
35#include <wtf/RefPtr.h>
36
37namespace WebCore {
38
39struct FilterData {
40    WTF_MAKE_FAST_ALLOCATED;
41    WTF_MAKE_NONCOPYABLE(FilterData);
42public:
43    enum FilterDataState { PaintingSource, Applying, Built, CycleDetected, MarkedForRemoval };
44
45    FilterData()
46        : savedContext(0)
47        , state(PaintingSource)
48    {
49    }
50
51    RefPtr<SVGFilter> filter;
52    std::unique_ptr<SVGFilterBuilder> builder;
53    std::unique_ptr<ImageBuffer> sourceGraphicBuffer;
54    GraphicsContext* savedContext;
55    AffineTransform shearFreeAbsoluteTransform;
56    FloatRect boundaries;
57    FloatRect drawingRegion;
58    FloatSize scale;
59    FilterDataState state;
60};
61
62class GraphicsContext;
63
64class RenderSVGResourceFilter final : public RenderSVGResourceContainer {
65public:
66    RenderSVGResourceFilter(SVGFilterElement&, PassRef<RenderStyle>);
67    virtual ~RenderSVGResourceFilter();
68
69    SVGFilterElement& filterElement() const { return toSVGFilterElement(RenderSVGResourceContainer::element()); }
70
71    virtual void removeAllClientsFromCache(bool markForInvalidation = true) override;
72    virtual void removeClientFromCache(RenderElement&, bool markForInvalidation = true) override;
73
74    virtual bool applyResource(RenderElement&, const RenderStyle&, GraphicsContext*&, unsigned short resourceMode) override;
75    virtual void postApplyResource(RenderElement&, GraphicsContext*&, unsigned short resourceMode, const Path*, const RenderSVGShape*) override;
76
77    virtual FloatRect resourceBoundingBox(const RenderObject&) override;
78
79    std::unique_ptr<SVGFilterBuilder> buildPrimitives(SVGFilter*) const;
80
81    SVGUnitTypes::SVGUnitType filterUnits() const { return filterElement().filterUnits(); }
82    SVGUnitTypes::SVGUnitType primitiveUnits() const { return filterElement().primitiveUnits(); }
83
84    void primitiveAttributeChanged(RenderObject*, const QualifiedName&);
85
86    virtual RenderSVGResourceType resourceType() const { return s_resourceType; }
87    static RenderSVGResourceType s_resourceType;
88
89    FloatRect drawingRegion(RenderObject*) const;
90private:
91    void element() const = delete;
92
93    virtual const char* renderName() const override { return "RenderSVGResourceFilter"; }
94    virtual bool isSVGResourceFilter() const override { return true; }
95
96    bool fitsInMaximumImageSize(const FloatSize&, FloatSize&);
97
98    HashMap<RenderObject*, std::unique_ptr<FilterData>> m_filter;
99};
100
101RENDER_OBJECT_TYPE_CASTS(RenderSVGResourceFilter, isSVGResourceFilter())
102
103}
104
105#endif
106#endif
107