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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(SVG) && ENABLE(FILTERS)
28 #include "FloatRect.h"
29 #include "ImageBuffer.h"
30 #include "RenderSVGResourceContainer.h"
31 #include "SVGFilter.h"
32 #include "SVGFilterBuilder.h"
33 #include "SVGFilterElement.h"
34 #include "SVGUnitTypes.h"
35 
36 #include <wtf/OwnPtr.h>
37 #include <wtf/PassOwnPtr.h>
38 #include <wtf/RefPtr.h>
39 
40 namespace WebCore {
41 
42 struct FilterData {
FilterDataFilterData43     FilterData()
44         : savedContext(0)
45         , builded(false)
46         , markedForRemoval(false)
47     {
48     }
49 
50     RefPtr<SVGFilter> filter;
51     RefPtr<SVGFilterBuilder> builder;
52     OwnPtr<ImageBuffer> sourceGraphicBuffer;
53     GraphicsContext* savedContext;
54     AffineTransform shearFreeAbsoluteTransform;
55     FloatRect boundaries;
56     FloatSize scale;
57     bool builded : 1;
58     bool markedForRemoval : 1;
59 };
60 
61 class GraphicsContext;
62 
63 class RenderSVGResourceFilter : public RenderSVGResourceContainer {
64 public:
65     RenderSVGResourceFilter(SVGFilterElement*);
66     virtual ~RenderSVGResourceFilter();
67 
renderName()68     virtual const char* renderName() const { return "RenderSVGResourceFilter"; }
isSVGResourceFilter()69     virtual bool isSVGResourceFilter() const { return true; }
70 
71     virtual void removeAllClientsFromCache(bool markForInvalidation = true);
72     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true);
73 
74     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode);
75     virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short resourceMode, const Path*);
76 
77     virtual FloatRect resourceBoundingBox(RenderObject*);
78 
79     PassRefPtr<SVGFilterBuilder> buildPrimitives(Filter*);
80 
filterUnits()81     SVGUnitTypes::SVGUnitType filterUnits() const { return toUnitType(static_cast<SVGFilterElement*>(node())->filterUnits()); }
primitiveUnits()82     SVGUnitTypes::SVGUnitType primitiveUnits() const { return toUnitType(static_cast<SVGFilterElement*>(node())->primitiveUnits()); }
83 
84     void primitiveAttributeChanged(RenderObject*, const QualifiedName&);
85 
resourceType()86     virtual RenderSVGResourceType resourceType() const { return s_resourceType; }
87     static RenderSVGResourceType s_resourceType;
88 
89 private:
90     bool fitsInMaximumImageSize(const FloatSize&, FloatSize&);
91 
92     HashMap<RenderObject*, FilterData*> m_filter;
93 };
94 
95 }
96 
97 #endif
98 #endif
99