1 /*
2 * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
3 * Copyright (C) 2006 Apple Computer, Inc.
4 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
5 * Copyright (C) 2007, 2008, 2009 Rob Buis <buis@kde.org>
6 * Copyright (C) 2009 Google, Inc.
7 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
8 * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
19 *
20 * You should have received a copy of the GNU Library General Public License
21 * along with this library; see the file COPYING.LIB. If not, write to
22 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
24 */
25
26 #include "config.h"
27
28 #include "core/rendering/svg/RenderSVGImage.h"
29
30 #include "core/rendering/GraphicsContextAnnotator.h"
31 #include "core/rendering/ImageQualityController.h"
32 #include "core/rendering/LayoutRectRecorder.h"
33 #include "core/rendering/LayoutRepainter.h"
34 #include "core/rendering/PointerEventsHitRules.h"
35 #include "core/rendering/RenderImageResource.h"
36 #include "core/rendering/svg/RenderSVGResource.h"
37 #include "core/rendering/svg/SVGRenderingContext.h"
38 #include "core/rendering/svg/SVGResources.h"
39 #include "core/rendering/svg/SVGResourcesCache.h"
40 #include "core/svg/SVGImageElement.h"
41 #include "platform/graphics/GraphicsContextStateSaver.h"
42
43 namespace WebCore {
44
RenderSVGImage(SVGImageElement * impl)45 RenderSVGImage::RenderSVGImage(SVGImageElement* impl)
46 : RenderSVGModelObject(impl)
47 , m_needsBoundariesUpdate(true)
48 , m_needsTransformUpdate(true)
49 , m_imageResource(RenderImageResource::create())
50 {
51 m_imageResource->initialize(this);
52 }
53
~RenderSVGImage()54 RenderSVGImage::~RenderSVGImage()
55 {
56 ImageQualityController::remove(this);
57 m_imageResource->shutdown();
58 }
59
updateImageViewport()60 bool RenderSVGImage::updateImageViewport()
61 {
62 SVGImageElement* image = toSVGImageElement(element());
63 FloatRect oldBoundaries = m_objectBoundingBox;
64 bool updatedViewport = false;
65
66 SVGLengthContext lengthContext(image);
67 m_objectBoundingBox = FloatRect(image->xCurrentValue().value(lengthContext), image->yCurrentValue().value(lengthContext), image->widthCurrentValue().value(lengthContext), image->heightCurrentValue().value(lengthContext));
68
69 // Images with preserveAspectRatio=none should force non-uniform scaling. This can be achieved
70 // by setting the image's container size to its intrinsic size.
71 // See: http://www.w3.org/TR/SVG/single-page.html, 7.8 The ‘preserveAspectRatio’ attribute.
72 if (image->preserveAspectRatioCurrentValue().align() == SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE) {
73 if (ImageResource* cachedImage = m_imageResource->cachedImage()) {
74 LayoutSize intrinsicSize = cachedImage->imageSizeForRenderer(0, style()->effectiveZoom());
75 if (intrinsicSize != m_imageResource->imageSize(style()->effectiveZoom())) {
76 m_imageResource->setContainerSizeForRenderer(roundedIntSize(intrinsicSize));
77 updatedViewport = true;
78 }
79 }
80 }
81
82 if (oldBoundaries != m_objectBoundingBox) {
83 if (!updatedViewport)
84 m_imageResource->setContainerSizeForRenderer(enclosingIntRect(m_objectBoundingBox).size());
85 updatedViewport = true;
86 m_needsBoundariesUpdate = true;
87 }
88
89 return updatedViewport;
90 }
91
layout()92 void RenderSVGImage::layout()
93 {
94 ASSERT(needsLayout());
95
96 LayoutRectRecorder recorder(*this);
97 LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) && selfNeedsLayout());
98 updateImageViewport();
99
100 bool transformOrBoundariesUpdate = m_needsTransformUpdate || m_needsBoundariesUpdate;
101 if (m_needsTransformUpdate) {
102 m_localTransform = toSVGImageElement(element())->animatedLocalTransform();
103 m_needsTransformUpdate = false;
104 }
105
106 if (m_needsBoundariesUpdate) {
107 m_repaintBoundingBox = m_objectBoundingBox;
108 SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox);
109
110 m_needsBoundariesUpdate = false;
111 }
112
113 // Invalidate all resources of this client if our layout changed.
114 if (everHadLayout() && selfNeedsLayout())
115 SVGResourcesCache::clientLayoutChanged(this);
116
117 // If our bounds changed, notify the parents.
118 if (transformOrBoundariesUpdate)
119 RenderSVGModelObject::setNeedsBoundariesUpdate();
120
121 repainter.repaintAfterLayout();
122 clearNeedsLayout();
123 }
124
paint(PaintInfo & paintInfo,const LayoutPoint &)125 void RenderSVGImage::paint(PaintInfo& paintInfo, const LayoutPoint&)
126 {
127 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this);
128
129 if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN || !m_imageResource->hasImage())
130 return;
131
132 FloatRect boundingBox = repaintRectInLocalCoordinates();
133 if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(boundingBox, m_localTransform, paintInfo))
134 return;
135
136 PaintInfo childPaintInfo(paintInfo);
137 bool drawsOutline = style()->outlineWidth() && (childPaintInfo.phase == PaintPhaseOutline || childPaintInfo.phase == PaintPhaseSelfOutline);
138 if (drawsOutline || childPaintInfo.phase == PaintPhaseForeground) {
139 GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
140 childPaintInfo.applyTransform(m_localTransform);
141
142 if (childPaintInfo.phase == PaintPhaseForeground && !m_objectBoundingBox.isEmpty()) {
143 SVGRenderingContext renderingContext(this, childPaintInfo);
144
145 if (renderingContext.isRenderingPrepared()) {
146 if (style()->svgStyle()->bufferedRendering() == BR_STATIC && renderingContext.bufferForeground(m_bufferedForeground))
147 return;
148
149 paintForeground(childPaintInfo);
150 }
151 }
152
153 if (drawsOutline)
154 paintOutline(childPaintInfo, IntRect(boundingBox));
155 }
156 }
157
paintForeground(PaintInfo & paintInfo)158 void RenderSVGImage::paintForeground(PaintInfo& paintInfo)
159 {
160 RefPtr<Image> image = m_imageResource->image();
161 FloatRect destRect = m_objectBoundingBox;
162 FloatRect srcRect(0, 0, image->width(), image->height());
163
164 SVGImageElement* imageElement = toSVGImageElement(element());
165 imageElement->preserveAspectRatioCurrentValue().transformRect(destRect, srcRect);
166
167 bool useLowQualityScaling = false;
168 if (style()->svgStyle()->bufferedRendering() != BR_STATIC)
169 useLowQualityScaling = ImageQualityController::imageQualityController()->shouldPaintAtLowQuality(paintInfo.context, this, image.get(), image.get(), LayoutSize(destRect.size()));
170
171 paintInfo.context->drawImage(image.get(), destRect, srcRect, CompositeSourceOver, DoNotRespectImageOrientation, useLowQualityScaling);
172 }
173
invalidateBufferedForeground()174 void RenderSVGImage::invalidateBufferedForeground()
175 {
176 m_bufferedForeground.clear();
177 }
178
nodeAtFloatPoint(const HitTestRequest & request,HitTestResult & result,const FloatPoint & pointInParent,HitTestAction hitTestAction)179 bool RenderSVGImage::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
180 {
181 // We only draw in the forground phase, so we only hit-test then.
182 if (hitTestAction != HitTestForeground)
183 return false;
184
185 PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, request, style()->pointerEvents());
186 bool isVisible = (style()->visibility() == VISIBLE);
187 if (isVisible || !hitRules.requireVisible) {
188 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
189
190 if (!SVGRenderSupport::pointInClippingArea(this, localPoint))
191 return false;
192
193 if (hitRules.canHitFill || hitRules.canHitBoundingBox) {
194 if (m_objectBoundingBox.contains(localPoint)) {
195 updateHitTestResult(result, roundedLayoutPoint(localPoint));
196 return true;
197 }
198 }
199 }
200
201 return false;
202 }
203
imageChanged(WrappedImagePtr,const IntRect *)204 void RenderSVGImage::imageChanged(WrappedImagePtr, const IntRect*)
205 {
206 // The image resource defaults to nullImage until the resource arrives.
207 // This empty image may be cached by SVG resources which must be invalidated.
208 if (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this))
209 resources->removeClientFromCache(this);
210
211 // Eventually notify parent resources, that we've changed.
212 RenderSVGResource::markForLayoutAndParentResourceInvalidation(this, false);
213
214 // Update the SVGImageCache sizeAndScales entry in case image loading finished after layout.
215 // (https://bugs.webkit.org/show_bug.cgi?id=99489)
216 m_objectBoundingBox = FloatRect();
217 updateImageViewport();
218
219 invalidateBufferedForeground();
220
221 repaint();
222 }
223
addFocusRingRects(Vector<IntRect> & rects,const LayoutPoint &,const RenderLayerModelObject *)224 void RenderSVGImage::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&, const RenderLayerModelObject*)
225 {
226 // this is called from paint() after the localTransform has already been applied
227 IntRect contentRect = enclosingIntRect(repaintRectInLocalCoordinates());
228 if (!contentRect.isEmpty())
229 rects.append(contentRect);
230 }
231
232 } // namespace WebCore
233