Home | History | Annotate | Download | only in svg 
      1 /*
      2  * Copyright (C) 2006 Alexander Kellett <lypanov (at) kde.org>
      3  * Copyright (C) 2006 Apple Computer, Inc.
      4  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      5  * Copyright (C) 2007, 2008, 2009 Rob Buis <buis (at) kde.org>
      6  * Copyright (C) 2009 Google, Inc.
      7  * Copyright (C) 2009 Dirk Schulze <krit (at) webkit.org>
      8  * Copyright (C) 2010 Patrick Gansterer <paroga (at) 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 #if ENABLE(SVG)
     29 #include "RenderSVGImage.h"
     30 
     31 #include "Attr.h"
     32 #include "FloatConversion.h"
     33 #include "FloatQuad.h"
     34 #include "GraphicsContext.h"
     35 #include "PointerEventsHitRules.h"
     36 #include "RenderImageResource.h"
     37 #include "RenderLayer.h"
     38 #include "RenderSVGResourceContainer.h"
     39 #include "RenderSVGResourceFilter.h"
     40 #include "SVGImageElement.h"
     41 #include "SVGLength.h"
     42 #include "SVGPreserveAspectRatio.h"
     43 #include "SVGRenderSupport.h"
     44 #include "SVGResources.h"
     45 
     46 namespace WebCore {
     47 
     48 RenderSVGImage::RenderSVGImage(SVGImageElement* impl)
     49     : RenderSVGModelObject(impl)
     50     , m_updateCachedRepaintRect(true)
     51     , m_needsTransformUpdate(true)
     52     , m_imageResource(RenderImageResource::create())
     53 {
     54     m_imageResource->initialize(this);
     55 }
     56 
     57 RenderSVGImage::~RenderSVGImage()
     58 {
     59     m_imageResource->shutdown();
     60 }
     61 
     62 void RenderSVGImage::layout()
     63 {
     64     ASSERT(needsLayout());
     65 
     66     LayoutRepainter repainter(*this, checkForRepaintDuringLayout() && selfNeedsLayout());
     67     SVGImageElement* image = static_cast<SVGImageElement*>(node());
     68 
     69     bool transformOrBoundariesUpdate = m_needsTransformUpdate || m_updateCachedRepaintRect;
     70     if (m_needsTransformUpdate) {
     71         m_localTransform = image->animatedLocalTransform();
     72         m_needsTransformUpdate = false;
     73     }
     74 
     75     if (m_updateCachedRepaintRect) {
     76         m_repaintBoundingBox = m_objectBoundingBox;
     77         SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox);
     78         m_updateCachedRepaintRect = false;
     79     }
     80 
     81     // Invalidate all resources of this client if our layout changed.
     82     if (m_everHadLayout && selfNeedsLayout())
     83         SVGResourcesCache::clientLayoutChanged(this);
     84 
     85     // If our bounds changed, notify the parents.
     86     if (transformOrBoundariesUpdate)
     87         RenderSVGModelObject::setNeedsBoundariesUpdate();
     88 
     89     repainter.repaintAfterLayout();
     90     setNeedsLayout(false);
     91 }
     92 
     93 void RenderSVGImage::updateFromElement()
     94 {
     95     SVGImageElement* image = static_cast<SVGImageElement*>(node());
     96 
     97     FloatRect oldBoundaries = m_objectBoundingBox;
     98     m_objectBoundingBox = FloatRect(image->x().value(image), image->y().value(image), image->width().value(image), image->height().value(image));
     99     if (m_objectBoundingBox != oldBoundaries) {
    100         m_updateCachedRepaintRect = true;
    101         setNeedsLayout(true);
    102     }
    103     RenderSVGModelObject::updateFromElement();
    104 }
    105 
    106 void RenderSVGImage::paint(PaintInfo& paintInfo, int, int)
    107 {
    108     if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN || !m_imageResource->hasImage())
    109         return;
    110 
    111     FloatRect boundingBox = repaintRectInLocalCoordinates();
    112     if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(boundingBox, m_localTransform, paintInfo))
    113         return;
    114 
    115     PaintInfo childPaintInfo(paintInfo);
    116     bool drawsOutline = style()->outlineWidth() && (childPaintInfo.phase == PaintPhaseOutline || childPaintInfo.phase == PaintPhaseSelfOutline);
    117     if (drawsOutline || childPaintInfo.phase == PaintPhaseForeground) {
    118         childPaintInfo.context->save();
    119         childPaintInfo.applyTransform(m_localTransform);
    120 
    121         if (childPaintInfo.phase == PaintPhaseForeground) {
    122             PaintInfo savedInfo(childPaintInfo);
    123 
    124             if (SVGRenderSupport::prepareToRenderSVGContent(this, childPaintInfo)) {
    125                 RefPtr<Image> image = m_imageResource->image();
    126                 FloatRect destRect = m_objectBoundingBox;
    127                 FloatRect srcRect(0, 0, image->width(), image->height());
    128 
    129                 SVGImageElement* imageElement = static_cast<SVGImageElement*>(node());
    130                 if (imageElement->preserveAspectRatio().align() != SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE)
    131                     imageElement->preserveAspectRatio().transformRect(destRect, srcRect);
    132 
    133                 childPaintInfo.context->drawImage(image.get(), ColorSpaceDeviceRGB, destRect, srcRect);
    134             }
    135 
    136             SVGRenderSupport::finishRenderSVGContent(this, childPaintInfo, savedInfo.context);
    137         }
    138 
    139         if (drawsOutline)
    140             paintOutline(childPaintInfo.context, static_cast<int>(boundingBox.x()), static_cast<int>(boundingBox.y()),
    141                 static_cast<int>(boundingBox.width()), static_cast<int>(boundingBox.height()));
    142 
    143         childPaintInfo.context->restore();
    144     }
    145 }
    146 
    147 bool RenderSVGImage::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
    148 {
    149     // We only draw in the forground phase, so we only hit-test then.
    150     if (hitTestAction != HitTestForeground)
    151         return false;
    152 
    153     PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, request, style()->pointerEvents());
    154     bool isVisible = (style()->visibility() == VISIBLE);
    155     if (isVisible || !hitRules.requireVisible) {
    156         FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
    157 
    158         if (!SVGRenderSupport::pointInClippingArea(this, localPoint))
    159             return false;
    160 
    161         if (hitRules.canHitFill) {
    162             if (m_objectBoundingBox.contains(localPoint)) {
    163                 updateHitTestResult(result, roundedIntPoint(localPoint));
    164                 return true;
    165             }
    166         }
    167     }
    168 
    169     return false;
    170 }
    171 
    172 void RenderSVGImage::imageChanged(WrappedImagePtr, const IntRect*)
    173 {
    174     // The image resource defaults to nullImage until the resource arrives.
    175     // This empty image may be cached by SVG resources which must be invalidated.
    176     if (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this))
    177         resources->removeClientFromCache(this);
    178 
    179     // Eventually notify parent resources, that we've changed.
    180     RenderSVGResource::markForLayoutAndParentResourceInvalidation(this, false);
    181 
    182     repaint();
    183 }
    184 
    185 void RenderSVGImage::addFocusRingRects(Vector<IntRect>& rects, int, int)
    186 {
    187     // this is called from paint() after the localTransform has already been applied
    188     IntRect contentRect = enclosingIntRect(repaintRectInLocalCoordinates());
    189     if (!contentRect.isEmpty())
    190         rects.append(contentRect);
    191 }
    192 
    193 } // namespace WebCore
    194 
    195 #endif // ENABLE(SVG)
    196