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 #if ENABLE(SVG) && ENABLE(SVG_FILTERS)
23 #include "SVGResourceFilter.h"
24
25 #include "SVGRenderTreeAsText.h"
26
27 namespace WebCore
28 {
29
SVGResourceFilter()30 SVGResourceFilter::SVGResourceFilter()
31 : m_platformData(createPlatformData())
32 , m_filterBBoxMode(false)
33 , m_effectBBoxMode(false)
34 , m_xBBoxMode(false)
35 , m_yBBoxMode(false)
36 {
37 }
38
clearEffects()39 void SVGResourceFilter::clearEffects()
40 {
41 m_effects.clear();
42 }
43
addFilterEffect(SVGFilterEffect * effect)44 void SVGResourceFilter::addFilterEffect(SVGFilterEffect *effect)
45 {
46 ASSERT(effect);
47
48 if (effect) {
49 ASSERT(effect->filter() == this);
50 m_effects.append(effect);
51 }
52 }
53
filterBBoxForItemBBox(const FloatRect & itemBBox) const54 FloatRect SVGResourceFilter::filterBBoxForItemBBox(const FloatRect &itemBBox) const
55 {
56 FloatRect filterBBox = filterRect();
57
58 float xOffset = 0.0f;
59 float yOffset = 0.0f;
60
61 if (!effectBoundingBoxMode()) {
62 xOffset = itemBBox.x();
63 yOffset = itemBBox.y();
64 }
65
66 if (filterBoundingBoxMode()) {
67 filterBBox = FloatRect(xOffset + filterBBox.x() * itemBBox.width(),
68 yOffset + filterBBox.y() * itemBBox.height(),
69 filterBBox.width() * itemBBox.width(),
70 filterBBox.height() * itemBBox.height());
71 } else {
72 if (xBoundingBoxMode()) {
73 filterBBox.setX(xOffset + filterBBox.x());
74 }
75
76 if (yBoundingBoxMode()) {
77 filterBBox.setY(yOffset + filterBBox.y());
78 }
79 }
80
81 return filterBBox;
82 }
83
externalRepresentation(TextStream & ts) const84 TextStream &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 }
99 ts << "]";
100 }
101
102 if (!filterBoundingBoxMode()) { // default is true
103 ts << " [bounding box mode=" << filterBoundingBoxMode() << "]";
104 }
105 if (effectBoundingBoxMode()) { // default is false
106 ts << " [effect bounding box mode=" << effectBoundingBoxMode() << "]";
107 }
108 if (m_effects.size() > 0) {
109 ts << " [effects=" << m_effects << "]";
110 }
111
112 return ts;
113 }
114
getFilterById(Document * document,const AtomicString & id)115 SVGResourceFilter *getFilterById(Document *document, const AtomicString &id)
116 {
117 SVGResource *resource = getResourceById(document, id);
118 if (resource && resource->isFilter()) {
119 return static_cast<SVGResourceFilter *>(resource);
120 }
121
122 return 0;
123 }
124
125 } // namespace WebCore
126
127 #endif // ENABLE(SVG)
128