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 

     9     This library is free software; you can redistribute it and/or

    10     modify it under the terms of the GNU Library General Public

    11     License as published by the Free Software Foundation; either

    12     version 2 of the License, or (at your option) any later version.

    13 

    14     This library is distributed in the hope that it will be useful,

    15     but WITHOUT ANY WARRANTY; without even the implied warranty of

    16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    17     Library General Public License for more details.

    18 

    19     You should have received a copy of the GNU Library General Public License

    20     along with this library; see the file COPYING.LIB.  If not, write to

    21     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    22     Boston, MA 02110-1301, USA.

    23 */

    24 

    25 #include "config.h"

    26 

    27 #if ENABLE(SVG)

    28 #include "RenderSVGImage.h"

    29 

    30 #include "Attr.h"

    31 #include "FloatConversion.h"

    32 #include "FloatQuad.h"

    33 #include "GraphicsContext.h"

    34 #include "PointerEventsHitRules.h"

    35 #include "RenderLayer.h"

    36 #include "RenderSVGResourceContainer.h"

    37 #include "RenderSVGResourceFilter.h"

    38 #include "SVGImageElement.h"

    39 #include "SVGLength.h"

    40 #include "SVGPreserveAspectRatio.h"

    41 #include "SVGRenderSupport.h"

    42 

    43 namespace WebCore {

    44 

    45 RenderSVGImage::RenderSVGImage(SVGImageElement* impl)

    46     : RenderImage(impl)

    47     , m_needsTransformUpdate(true)

    48 {

    49 }

    50 

    51 void RenderSVGImage::layout()

    52 {

    53     ASSERT(needsLayout());

    54 

    55     LayoutRepainter repainter(*this, m_everHadLayout && checkForRepaintDuringLayout());

    56     SVGImageElement* image = static_cast<SVGImageElement*>(node());

    57 

    58     if (m_needsTransformUpdate) {

    59         m_localTransform = image->animatedLocalTransform();

    60         m_needsTransformUpdate = false;

    61     }

    62 

    63     // minimum height

    64     setHeight(errorOccurred() ? intrinsicSize().height() : 0);

    65 

    66     calcWidth();

    67     calcHeight();

    68 

    69     // FIXME: Optimize caching the repaint rects.

    70     m_localBounds = FloatRect(image->x().value(image), image->y().value(image), image->width().value(image), image->height().value(image));

    71     m_cachedLocalRepaintRect = FloatRect();

    72 

    73     // Invalidate all resources of this client, if we changed something.

    74     if (m_everHadLayout && selfNeedsLayout())

    75         RenderSVGResource::invalidateAllResourcesOfRenderer(this);

    76 

    77     repainter.repaintAfterLayout();

    78     setNeedsLayout(false);

    79 }

    80 

    81 void RenderSVGImage::paint(PaintInfo& paintInfo, int, int)

    82 {

    83     if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN)

    84         return;

    85 

    86     paintInfo.context->save();

    87     paintInfo.context->concatCTM(localToParentTransform());

    88 

    89     if (paintInfo.phase == PaintPhaseForeground) {

    90         PaintInfo savedInfo(paintInfo);

    91 

    92         if (SVGRenderSupport::prepareToRenderSVGContent(this, paintInfo)) {

    93             FloatRect destRect = m_localBounds;

    94             FloatRect srcRect(0, 0, image()->width(), image()->height());

    95 

    96             SVGImageElement* imageElt = static_cast<SVGImageElement*>(node());

    97             if (imageElt->preserveAspectRatio().align() != SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE)

    98                 imageElt->preserveAspectRatio().transformRect(destRect, srcRect);

    99 

   100             paintInfo.context->drawImage(image(), DeviceColorSpace, destRect, srcRect);

   101         }

   102         SVGRenderSupport::finishRenderSVGContent(this, paintInfo, savedInfo.context);

   103     }

   104 

   105     if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())

   106         paintOutline(paintInfo.context, 0, 0, width(), height());

   107 

   108     paintInfo.context->restore();

   109 }

   110 

   111 void RenderSVGImage::destroy()

   112 {

   113     RenderSVGResource::invalidateAllResourcesOfRenderer(this);

   114     RenderImage::destroy();

   115 }

   116 

   117 bool RenderSVGImage::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)

   118 {

   119     // We only draw in the forground phase, so we only hit-test then.

   120     if (hitTestAction != HitTestForeground)

   121         return false;

   122 

   123     PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, request, style()->pointerEvents());

   124     bool isVisible = (style()->visibility() == VISIBLE);

   125     if (isVisible || !hitRules.requireVisible) {

   126         FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);

   127             

   128         if (!SVGRenderSupport::pointInClippingArea(this, localPoint))

   129             return false;

   130 

   131         if (hitRules.canHitFill) {

   132             if (m_localBounds.contains(localPoint)) {

   133                 updateHitTestResult(result, roundedIntPoint(localPoint));

   134                 return true;

   135             }

   136         }

   137     }

   138 

   139     return false;

   140 }

   141 

   142 bool RenderSVGImage::nodeAtPoint(const HitTestRequest&, HitTestResult&, int, int, int, int, HitTestAction)

   143 {

   144     ASSERT_NOT_REACHED();

   145     return false;

   146 }

   147 

   148 FloatRect RenderSVGImage::repaintRectInLocalCoordinates() const

   149 {

   150     // If we already have a cached repaint rect, return that

   151     if (!m_cachedLocalRepaintRect.isEmpty())

   152         return m_cachedLocalRepaintRect;

   153 

   154     m_cachedLocalRepaintRect = m_localBounds;

   155     SVGRenderSupport::intersectRepaintRectWithResources(this, m_cachedLocalRepaintRect);

   156 

   157     return m_cachedLocalRepaintRect;

   158 }

   159 

   160 void RenderSVGImage::imageChanged(WrappedImagePtr image, const IntRect* rect)

   161 {

   162     RenderImage::imageChanged(image, rect);

   163 #if ENABLE(FILTERS)

   164     // The image resource defaults to nullImage until the resource arrives.

   165     // This empty image may be cached by SVG filter effects which must be invalidated.

   166     if (RenderSVGResourceFilter* filter = getRenderSVGResourceById<RenderSVGResourceFilter>(document(), style()->svgStyle()->filterResource()))

   167         filter->invalidateClient(this);

   168 #endif

   169     repaint();

   170 }

   171 

   172 IntRect RenderSVGImage::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)

   173 {

   174     return SVGRenderSupport::clippedOverflowRectForRepaint(this, repaintContainer);

   175 }

   176 

   177 void RenderSVGImage::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed)

   178 {

   179     SVGRenderSupport::computeRectForRepaint(this, repaintContainer, repaintRect, fixed);

   180 }

   181 

   182 void RenderSVGImage::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState) const

   183 {

   184     SVGRenderSupport::mapLocalToContainer(this, repaintContainer, fixed, useTransforms, transformState);

   185 }

   186 

   187 void RenderSVGImage::addFocusRingRects(Vector<IntRect>& rects, int, int)

   188 {

   189     // this is called from paint() after the localTransform has already been applied

   190     IntRect contentRect = enclosingIntRect(repaintRectInLocalCoordinates());

   191     if (!contentRect.isEmpty())

   192         rects.append(contentRect);

   193 }

   194 

   195 void RenderSVGImage::absoluteRects(Vector<IntRect>&, int, int)

   196 {

   197     // This code path should never be taken for SVG, as we're assuming useTransforms=true everywhere, absoluteQuads should be used.

   198     ASSERT_NOT_REACHED();

   199 }

   200 

   201 void RenderSVGImage::absoluteQuads(Vector<FloatQuad>& quads)

   202 {

   203     quads.append(localToAbsoluteQuad(strokeBoundingBox()));

   204 }

   205 

   206 }

   207 

   208 #endif // ENABLE(SVG)