1 /*
2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above
9 * copyright notice, this list of conditions and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following
13 * disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include "config.h"
31
32 #include "core/rendering/RenderLayerFilterInfo.h"
33
34 #include "core/fetch/DocumentResourceReference.h"
35 #include "core/rendering/FilterEffectRenderer.h"
36 #include "core/rendering/RenderLayer.h"
37 #include "core/rendering/svg/ReferenceFilterBuilder.h"
38 #include "core/rendering/svg/RenderSVGResourceContainer.h"
39 #include "core/svg/SVGFilterElement.h"
40 #include "core/svg/SVGFilterPrimitiveStandardAttributes.h"
41 #include "core/svg/graphics/filters/SVGFilter.h"
42
43 namespace WebCore {
44
45 RenderLayerFilterInfoMap* RenderLayerFilterInfo::s_filterMap = 0;
46
filterInfoForRenderLayer(const RenderLayer * layer)47 RenderLayerFilterInfo* RenderLayerFilterInfo::filterInfoForRenderLayer(const RenderLayer* layer)
48 {
49 if (!s_filterMap)
50 return 0;
51 RenderLayerFilterInfoMap::iterator iter = s_filterMap->find(layer);
52 return (iter != s_filterMap->end()) ? iter->value : 0;
53 }
54
createFilterInfoForRenderLayerIfNeeded(RenderLayer * layer)55 RenderLayerFilterInfo* RenderLayerFilterInfo::createFilterInfoForRenderLayerIfNeeded(RenderLayer* layer)
56 {
57 if (!s_filterMap)
58 s_filterMap = new RenderLayerFilterInfoMap();
59
60 RenderLayerFilterInfoMap::iterator iter = s_filterMap->find(layer);
61 if (iter != s_filterMap->end()) {
62 ASSERT(layer->hasFilterInfo());
63 return iter->value;
64 }
65
66 RenderLayerFilterInfo* filter = new RenderLayerFilterInfo(layer);
67 s_filterMap->set(layer, filter);
68 layer->setHasFilterInfo(true);
69 return filter;
70 }
71
removeFilterInfoForRenderLayer(RenderLayer * layer)72 void RenderLayerFilterInfo::removeFilterInfoForRenderLayer(RenderLayer* layer)
73 {
74 if (!s_filterMap)
75 return;
76 RenderLayerFilterInfo* filter = s_filterMap->take(layer);
77 if (s_filterMap->isEmpty()) {
78 delete s_filterMap;
79 s_filterMap = 0;
80 }
81 if (!filter) {
82 ASSERT(!layer->hasFilterInfo());
83 return;
84 }
85 layer->setHasFilterInfo(false);
86 delete filter;
87 }
88
RenderLayerFilterInfo(RenderLayer * layer)89 RenderLayerFilterInfo::RenderLayerFilterInfo(RenderLayer* layer)
90 : m_layer(layer)
91 {
92 }
93
~RenderLayerFilterInfo()94 RenderLayerFilterInfo::~RenderLayerFilterInfo()
95 {
96 removeReferenceFilterClients();
97 }
98
setRenderer(PassRefPtr<FilterEffectRenderer> renderer)99 void RenderLayerFilterInfo::setRenderer(PassRefPtr<FilterEffectRenderer> renderer)
100 {
101 m_renderer = renderer;
102 }
103
notifyFinished(Resource *)104 void RenderLayerFilterInfo::notifyFinished(Resource*)
105 {
106 RenderObject* renderer = m_layer->renderer();
107 // FIXME: This caller of scheduleSVGFilterLayerUpdateHack() is not correct. It's using the layer update
108 // system to trigger a RenderLayer to go through the filter updating logic, but that might not
109 // even happen if this element is style sharing and RenderObject::setStyle() returns early.
110 // Filters need to find a better way to hook into the system.
111 toElement(renderer->node())->scheduleSVGFilterLayerUpdateHack();
112 renderer->paintInvalidationForWholeRenderer();
113 }
114
updateReferenceFilterClients(const FilterOperations & operations)115 void RenderLayerFilterInfo::updateReferenceFilterClients(const FilterOperations& operations)
116 {
117 removeReferenceFilterClients();
118 for (size_t i = 0; i < operations.size(); ++i) {
119 RefPtr<FilterOperation> filterOperation = operations.operations().at(i);
120 if (filterOperation->type() != FilterOperation::REFERENCE)
121 continue;
122 ReferenceFilterOperation* referenceFilterOperation = toReferenceFilterOperation(filterOperation.get());
123 DocumentResourceReference* documentReference = ReferenceFilterBuilder::documentResourceReference(referenceFilterOperation);
124 DocumentResource* cachedSVGDocument = documentReference ? documentReference->document() : 0;
125
126 if (cachedSVGDocument) {
127 // Reference is external; wait for notifyFinished().
128 cachedSVGDocument->addClient(this);
129 m_externalSVGReferences.append(cachedSVGDocument);
130 } else {
131 // Reference is internal; add layer as a client so we can trigger
132 // filter repaint on SVG attribute change.
133 Element* filter = m_layer->renderer()->node()->document().getElementById(referenceFilterOperation->fragment());
134 if (!isSVGFilterElement(filter))
135 continue;
136 if (filter->renderer())
137 toRenderSVGResourceContainer(filter->renderer())->addClientRenderLayer(m_layer);
138 else
139 toSVGFilterElement(filter)->addClient(m_layer->renderer()->node());
140 m_internalSVGReferences.append(filter);
141 }
142 }
143 }
144
removeReferenceFilterClients()145 void RenderLayerFilterInfo::removeReferenceFilterClients()
146 {
147 for (size_t i = 0; i < m_externalSVGReferences.size(); ++i)
148 m_externalSVGReferences.at(i)->removeClient(this);
149 m_externalSVGReferences.clear();
150 for (size_t i = 0; i < m_internalSVGReferences.size(); ++i) {
151 Element* filter = m_internalSVGReferences.at(i).get();
152 if (filter->renderer())
153 toRenderSVGResourceContainer(filter->renderer())->removeClientRenderLayer(m_layer);
154 else
155 toSVGFilterElement(filter)->removeClient(m_layer->renderer()->node());
156 }
157 m_internalSVGReferences.clear();
158 }
159
160 } // namespace WebCore
161
162