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/LayoutRepainter.h"
33 #include "core/rendering/PointerEventsHitRules.h"
34 #include "core/rendering/RenderImageResource.h"
35 #include "core/rendering/svg/RenderSVGResource.h"
36 #include "core/rendering/svg/SVGRenderSupport.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->x()->currentValue()->value(lengthContext), image->y()->currentValue()->value(lengthContext), image->width()->currentValue()->value(lengthContext), image->height()->currentValue()->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->preserveAspectRatio()->currentValue()->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 LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) && selfNeedsLayout());
97 updateImageViewport();
98
99 bool transformOrBoundariesUpdate = m_needsTransformUpdate || m_needsBoundariesUpdate;
100 if (m_needsTransformUpdate) {
101 m_localTransform = toSVGImageElement(element())->animatedLocalTransform();
102 m_needsTransformUpdate = false;
103 }
104
105 if (m_needsBoundariesUpdate) {
106 m_repaintBoundingBox = m_objectBoundingBox;
107 SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox);
108
109 m_needsBoundariesUpdate = false;
110 }
111
112 // Invalidate all resources of this client if our layout changed.
113 if (everHadLayout() && selfNeedsLayout())
114 SVGResourcesCache::clientLayoutChanged(this);
115
116 // If our bounds changed, notify the parents.
117 if (transformOrBoundariesUpdate)
118 RenderSVGModelObject::setNeedsBoundariesUpdate();
119
120 repainter.repaintAfterLayout();
121 clearNeedsLayout();
122 }
123
paint(PaintInfo & paintInfo,const LayoutPoint &)124 void RenderSVGImage::paint(PaintInfo& paintInfo, const LayoutPoint&)
125 {
126 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this);
127
128 if (paintInfo.context->paintingDisabled()
129 || paintInfo.phase != PaintPhaseForeground
130 || style()->visibility() == HIDDEN
131 || !m_imageResource->hasImage())
132 return;
133
134 FloatRect boundingBox = paintInvalidationRectInLocalCoordinates();
135 if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(boundingBox, m_localTransform, paintInfo))
136 return;
137
138 PaintInfo childPaintInfo(paintInfo);
139 GraphicsContextStateSaver stateSaver(*childPaintInfo.context, false);
140
141 if (!m_localTransform.isIdentity()) {
142 stateSaver.save();
143 childPaintInfo.applyTransform(m_localTransform, false);
144 }
145 if (!m_objectBoundingBox.isEmpty()) {
146 // SVGRenderingContext may taint the state - make sure we're always saving.
147 SVGRenderingContext renderingContext(this, childPaintInfo, stateSaver.saved() ?
148 SVGRenderingContext::DontSaveGraphicsContext : SVGRenderingContext::SaveGraphicsContext);
149
150 if (renderingContext.isRenderingPrepared()) {
151 if (style()->svgStyle()->bufferedRendering() == BR_STATIC && renderingContext.bufferForeground(m_bufferedForeground))
152 return;
153
154 paintForeground(childPaintInfo);
155 }
156 }
157
158 if (style()->outlineWidth())
159 paintOutline(childPaintInfo, IntRect(boundingBox));
160 }
161
paintForeground(PaintInfo & paintInfo)162 void RenderSVGImage::paintForeground(PaintInfo& paintInfo)
163 {
164 RefPtr<Image> image = m_imageResource->image();
165 FloatRect destRect = m_objectBoundingBox;
166 FloatRect srcRect(0, 0, image->width(), image->height());
167
168 SVGImageElement* imageElement = toSVGImageElement(element());
169 imageElement->preserveAspectRatio()->currentValue()->transformRect(destRect, srcRect);
170
171 InterpolationQuality interpolationQuality = InterpolationDefault;
172 if (style()->svgStyle()->bufferedRendering() != BR_STATIC)
173 interpolationQuality = ImageQualityController::imageQualityController()->chooseInterpolationQuality(paintInfo.context, this, image.get(), image.get(), LayoutSize(destRect.size()));
174
175 InterpolationQuality previousInterpolationQuality = paintInfo.context->imageInterpolationQuality();
176 paintInfo.context->setImageInterpolationQuality(interpolationQuality);
177 paintInfo.context->drawImage(image.get(), destRect, srcRect, CompositeSourceOver);
178 paintInfo.context->setImageInterpolationQuality(previousInterpolationQuality);
179 }
180
invalidateBufferedForeground()181 void RenderSVGImage::invalidateBufferedForeground()
182 {
183 m_bufferedForeground.clear();
184 }
185
nodeAtFloatPoint(const HitTestRequest & request,HitTestResult & result,const FloatPoint & pointInParent,HitTestAction hitTestAction)186 bool RenderSVGImage::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
187 {
188 // We only draw in the forground phase, so we only hit-test then.
189 if (hitTestAction != HitTestForeground)
190 return false;
191
192 PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, request, style()->pointerEvents());
193 bool isVisible = (style()->visibility() == VISIBLE);
194 if (isVisible || !hitRules.requireVisible) {
195 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
196
197 if (!SVGRenderSupport::pointInClippingArea(this, localPoint))
198 return false;
199
200 if (hitRules.canHitFill || hitRules.canHitBoundingBox) {
201 if (m_objectBoundingBox.contains(localPoint)) {
202 updateHitTestResult(result, roundedLayoutPoint(localPoint));
203 return true;
204 }
205 }
206 }
207
208 return false;
209 }
210
imageChanged(WrappedImagePtr,const IntRect *)211 void RenderSVGImage::imageChanged(WrappedImagePtr, const IntRect*)
212 {
213 // The image resource defaults to nullImage until the resource arrives.
214 // This empty image may be cached by SVG resources which must be invalidated.
215 if (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this))
216 resources->removeClientFromCache(this);
217
218 // Eventually notify parent resources, that we've changed.
219 RenderSVGResource::markForLayoutAndParentResourceInvalidation(this, false);
220
221 // Update the SVGImageCache sizeAndScales entry in case image loading finished after layout.
222 // (https://bugs.webkit.org/show_bug.cgi?id=99489)
223 m_objectBoundingBox = FloatRect();
224 updateImageViewport();
225
226 invalidateBufferedForeground();
227
228 paintInvalidationForWholeRenderer();
229 }
230
addFocusRingRects(Vector<IntRect> & rects,const LayoutPoint &,const RenderLayerModelObject *)231 void RenderSVGImage::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&, const RenderLayerModelObject*)
232 {
233 // this is called from paint() after the localTransform has already been applied
234 IntRect contentRect = enclosingIntRect(paintInvalidationRectInLocalCoordinates());
235 if (!contentRect.isEmpty())
236 rects.append(contentRect);
237 }
238
239 } // namespace WebCore
240