RenderSVGResourceFilter.h revision 2fc2651226baac27029e38c9d6ef883fa32084db 
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
40namespace WebCore {
41
42struct FilterData {
43    FilterData()
44        : savedContext(0)
45        , builded(false)
46    {
47    }
48
49    RefPtr<SVGFilter> filter;
50    RefPtr<SVGFilterBuilder> builder;
51    OwnPtr<ImageBuffer> sourceGraphicBuffer;
52    GraphicsContext* savedContext;
53    AffineTransform shearFreeAbsoluteTransform;
54    FloatRect boundaries;
55    FloatSize scale;
56    bool builded;
57};
58
59class GraphicsContext;
60
61class RenderSVGResourceFilter : public RenderSVGResourceContainer {
62public:
63    RenderSVGResourceFilter(SVGFilterElement*);
64    virtual ~RenderSVGResourceFilter();
65
66    virtual const char* renderName() const { return "RenderSVGResourceFilter"; }
67    virtual bool isSVGResourceFilter() const { return true; }
68
69    virtual void removeAllClientsFromCache(bool markForInvalidation = true);
70    virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true);
71
72    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode);
73    virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short resourceMode, const Path*);
74
75    virtual FloatRect resourceBoundingBox(RenderObject*);
76
77    PassRefPtr<SVGFilterBuilder> buildPrimitives(Filter*);
78
79    SVGUnitTypes::SVGUnitType filterUnits() const { return toUnitType(static_cast<SVGFilterElement*>(node())->filterUnits()); }
80    SVGUnitTypes::SVGUnitType primitiveUnits() const { return toUnitType(static_cast<SVGFilterElement*>(node())->primitiveUnits()); }
81
82    void primitiveAttributeChanged(RenderObject*, const QualifiedName&);
83
84    virtual RenderSVGResourceType resourceType() const { return s_resourceType; }
85    static RenderSVGResourceType s_resourceType;
86
87private:
88    bool fitsInMaximumImageSize(const FloatSize&, FloatSize&);
89
90    HashMap<RenderObject*, FilterData*> m_filter;
91};
92
93}
94
95#endif
96#endif
97