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SVGResourceFilter.cpp
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1/*
2 Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 2004, 2005 Rob Buis <buis@kde.org>
4 2005 Eric Seidel <eric@webkit.org>
5
6 This library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
10
11 This library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
15
16 You should have received a copy of the GNU Library General Public License
17 aint with this library; see the file COPYING.LIB. If not, write to
18 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 Boston, MA 02110-1301, USA.
20*/
21
22#include "config.h"
23
24#if ENABLE(SVG) && ENABLE(SVG_FILTERS)
25#include "SVGResourceFilter.h"
26
27#include "SVGRenderTreeAsText.h"
28#include "SVGFilterEffect.h"
29
30namespace WebCore {
31
32SVGResourceFilter::SVGResourceFilter()
33 : m_platformData(createPlatformData())
34 , m_filterBBoxMode(false)
35 , m_effectBBoxMode(false)
36 , m_xBBoxMode(false)
37 , m_yBBoxMode(false)
38{
39}
40
41void SVGResourceFilter::clearEffects()
42{
43 m_effects.clear();
44}
45
46void SVGResourceFilter::addFilterEffect(SVGFilterEffect* effect)
47{
48 ASSERT(effect);
49
50 if (effect) {
51 ASSERT(effect->filter() == this);
52 m_effects.append(effect);
53 }
54}
55
56FloatRect SVGResourceFilter::filterBBoxForItemBBox(const FloatRect& itemBBox) const
57{
58 FloatRect filterBBox = filterRect();
59
60 float xOffset = 0.0f;
61 float yOffset = 0.0f;
62
63 if (!effectBoundingBoxMode()) {
64 xOffset = itemBBox.x();
65 yOffset = itemBBox.y();
66 }
67
68 if (filterBoundingBoxMode()) {
69 filterBBox = FloatRect(xOffset + filterBBox.x() * itemBBox.width(),
70 yOffset + filterBBox.y() * itemBBox.height(),
71 filterBBox.width() * itemBBox.width(),
72 filterBBox.height() * itemBBox.height());
73 } else {
74 if (xBoundingBoxMode())
75 filterBBox.setX(xOffset + filterBBox.x());
76
77 if (yBoundingBoxMode())
78 filterBBox.setY(yOffset + filterBBox.y());
79 }
80
81 return filterBBox;
82}
83
84TextStream& SVGResourceFilter::externalRepresentation(TextStream& ts) const
85{
86 ts << "[type=FILTER] ";
87
88 FloatRect bbox = filterRect();
89 static FloatRect defaultFilterRect(0, 0, 1, 1);
90
91 if (!filterBoundingBoxMode() || bbox != defaultFilterRect) {
92 ts << " [bounding box=";
93 if (filterBoundingBoxMode()) {
94 bbox.scale(100.f);
95 ts << "at (" << bbox.x() << "%," << bbox.y() << "%) size " << bbox.width() << "%x" << bbox.height() << "%";
96 } else
97 ts << filterRect();
98 ts << "]";
99 }
100
101 if (!filterBoundingBoxMode()) // default is true
102 ts << " [bounding box mode=" << filterBoundingBoxMode() << "]";
103 if (effectBoundingBoxMode()) // default is false
104 ts << " [effect bounding box mode=" << effectBoundingBoxMode() << "]";
105 if (m_effects.size() > 0)
106 ts << " [effects=" << m_effects << "]";
107
108 return ts;
109}
110
111SVGResourceFilter* getFilterById(Document* document, const AtomicString& id)
112{
113 SVGResource* resource = getResourceById(document, id);
114 if (resource && resource->isFilter())
115 return static_cast<SVGResourceFilter*>(resource);
116
117 return 0;
118}
119
120
121} // namespace WebCore
122
123#endif // ENABLE(SVG)
SVGFilterEffect.h
SVGResourceFilter.h
WebCore
Definition: CSSHelper.h:7
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