| /* |
| Copyright (C) 2006 Alexander Kellett <lypanov@kde.org> |
| Copyright (C) 2006 Apple Computer, Inc. |
| Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org> |
| Copyright (C) 2007 Rob Buis <buis@kde.org> |
| |
| This file is part of the WebKit project |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public License |
| along with this library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(SVG) |
| #include "RenderSVGImage.h" |
| |
| #include "Attr.h" |
| #include "FloatConversion.h" |
| #include "GraphicsContext.h" |
| #include "PointerEventsHitRules.h" |
| #include "SVGImageElement.h" |
| #include "SVGLength.h" |
| #include "SVGPreserveAspectRatio.h" |
| #include "SVGRenderSupport.h" |
| #include "SVGResourceClipper.h" |
| #include "SVGResourceFilter.h" |
| #include "SVGResourceMasker.h" |
| |
| namespace WebCore { |
| |
| RenderSVGImage::RenderSVGImage(SVGImageElement* impl) |
| : RenderImage(impl) |
| { |
| } |
| |
| RenderSVGImage::~RenderSVGImage() |
| { |
| } |
| |
| void RenderSVGImage::adjustRectsForAspectRatio(FloatRect& destRect, FloatRect& srcRect, SVGPreserveAspectRatio* aspectRatio) |
| { |
| float origDestWidth = destRect.width(); |
| float origDestHeight = destRect.height(); |
| if (aspectRatio->meetOrSlice() == SVGPreserveAspectRatio::SVG_MEETORSLICE_MEET) { |
| float widthToHeightMultiplier = srcRect.height() / srcRect.width(); |
| if (origDestHeight > (origDestWidth * widthToHeightMultiplier)) { |
| destRect.setHeight(origDestWidth * widthToHeightMultiplier); |
| switch(aspectRatio->align()) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| destRect.setY(destRect.y() + origDestHeight / 2.0f - destRect.height() / 2.0f); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setY(destRect.y() + origDestHeight - destRect.height()); |
| break; |
| } |
| } |
| if (origDestWidth > (origDestHeight / widthToHeightMultiplier)) { |
| destRect.setWidth(origDestHeight / widthToHeightMultiplier); |
| switch(aspectRatio->align()) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| destRect.setX(destRect.x() + origDestWidth / 2.0f - destRect.width() / 2.0f); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setX(destRect.x() + origDestWidth - destRect.width()); |
| break; |
| } |
| } |
| } else if (aspectRatio->meetOrSlice() == SVGPreserveAspectRatio::SVG_MEETORSLICE_SLICE) { |
| float widthToHeightMultiplier = srcRect.height() / srcRect.width(); |
| // if the destination height is less than the height of the image we'll be drawing |
| if (origDestHeight < (origDestWidth * widthToHeightMultiplier)) { |
| float destToSrcMultiplier = srcRect.width() / destRect.width(); |
| srcRect.setHeight(destRect.height() * destToSrcMultiplier); |
| switch(aspectRatio->align()) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| srcRect.setY(destRect.y() + image()->height() / 2.0f - srcRect.height() / 2.0f); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| srcRect.setY(destRect.y() + image()->height() - srcRect.height()); |
| break; |
| } |
| } |
| // if the destination width is less than the width of the image we'll be drawing |
| if (origDestWidth < (origDestHeight / widthToHeightMultiplier)) { |
| float destToSrcMultiplier = srcRect.height() / destRect.height(); |
| srcRect.setWidth(destRect.width() * destToSrcMultiplier); |
| switch(aspectRatio->align()) { |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| srcRect.setX(destRect.x() + image()->width() / 2.0f - srcRect.width() / 2.0f); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| srcRect.setX(destRect.x() + image()->width() - srcRect.width()); |
| break; |
| } |
| } |
| } |
| } |
| |
| bool RenderSVGImage::calculateLocalTransform() |
| { |
| AffineTransform oldTransform = m_localTransform; |
| m_localTransform = static_cast<SVGStyledTransformableElement*>(element())->animatedLocalTransform(); |
| return (m_localTransform != oldTransform); |
| } |
| |
| void RenderSVGImage::layout() |
| { |
| ASSERT(needsLayout()); |
| |
| IntRect oldBounds; |
| IntRect oldOutlineBox; |
| bool checkForRepaint = checkForRepaintDuringLayout(); |
| if (checkForRepaint) { |
| oldBounds = absoluteClippedOverflowRect(); |
| oldOutlineBox = absoluteOutlineBox(); |
| } |
| |
| calculateLocalTransform(); |
| |
| // minimum height |
| m_height = errorOccurred() ? intrinsicSize().height() : 0; |
| |
| calcWidth(); |
| calcHeight(); |
| |
| SVGImageElement* image = static_cast<SVGImageElement*>(node()); |
| m_localBounds = FloatRect(image->x().value(), image->y().value(), image->width().value(), image->height().value()); |
| |
| calculateAbsoluteBounds(); |
| |
| if (checkForRepaint) |
| repaintAfterLayoutIfNeeded(oldBounds, oldOutlineBox); |
| |
| setNeedsLayout(false); |
| } |
| |
| void RenderSVGImage::paint(PaintInfo& paintInfo, int, int) |
| { |
| if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN) |
| return; |
| |
| paintInfo.context->save(); |
| paintInfo.context->concatCTM(localTransform()); |
| |
| if (paintInfo.phase == PaintPhaseForeground) { |
| SVGResourceFilter* filter = 0; |
| |
| PaintInfo savedInfo(paintInfo); |
| |
| prepareToRenderSVGContent(this, paintInfo, m_localBounds, filter); |
| |
| FloatRect destRect = m_localBounds; |
| FloatRect srcRect(0, 0, image()->width(), image()->height()); |
| |
| SVGImageElement* imageElt = static_cast<SVGImageElement*>(node()); |
| if (imageElt->preserveAspectRatio()->align() != SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE) |
| adjustRectsForAspectRatio(destRect, srcRect, imageElt->preserveAspectRatio()); |
| |
| paintInfo.context->drawImage(image(), destRect, srcRect); |
| |
| finishRenderSVGContent(this, paintInfo, m_localBounds, filter, savedInfo.context); |
| } |
| |
| paintInfo.context->restore(); |
| } |
| |
| bool RenderSVGImage::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int _x, int _y, int, int, HitTestAction hitTestAction) |
| { |
| // We only draw in the forground phase, so we only hit-test then. |
| if (hitTestAction != HitTestForeground) |
| return false; |
| |
| PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, style()->svgStyle()->pointerEvents()); |
| |
| bool isVisible = (style()->visibility() == VISIBLE); |
| if (isVisible || !hitRules.requireVisible) { |
| double localX, localY; |
| absoluteTransform().inverse().map(_x, _y, &localX, &localY); |
| |
| if (hitRules.canHitFill) { |
| if (m_localBounds.contains(narrowPrecisionToFloat(localX), narrowPrecisionToFloat(localY))) { |
| updateHitTestResult(result, IntPoint(_x, _y)); |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| bool RenderSVGImage::requiresLayer() |
| { |
| return false; |
| } |
| |
| FloatRect RenderSVGImage::relativeBBox(bool) const |
| { |
| return m_localBounds; |
| } |
| |
| void RenderSVGImage::imageChanged(CachedImage* image) |
| { |
| RenderImage::imageChanged(image); |
| |
| // We override to invalidate a larger rect, since SVG images can draw outside their "bounds" |
| repaintRectangle(absoluteClippedOverflowRect()); |
| } |
| |
| void RenderSVGImage::calculateAbsoluteBounds() |
| { |
| FloatRect absoluteRect = absoluteTransform().mapRect(relativeBBox(true)); |
| |
| #if ENABLE(SVG_FILTERS) |
| // Filters can expand the bounding box |
| SVGResourceFilter* filter = getFilterById(document(), SVGURIReference::getTarget(style()->svgStyle()->filter())); |
| if (filter) |
| absoluteRect.unite(filter->filterBBoxForItemBBox(absoluteRect)); |
| #endif |
| |
| if (!absoluteRect.isEmpty()) |
| absoluteRect.inflate(1); // inflate 1 pixel for antialiasing |
| |
| m_absoluteBounds = enclosingIntRect(absoluteRect); |
| } |
| |
| IntRect RenderSVGImage::absoluteClippedOverflowRect() |
| { |
| return m_absoluteBounds; |
| } |
| |
| void RenderSVGImage::addFocusRingRects(GraphicsContext* graphicsContext, int tx, int ty) |
| { |
| // this is called from paint() after the localTransform has already been applied |
| IntRect contentRect = enclosingIntRect(relativeBBox()); |
| graphicsContext->addFocusRingRect(contentRect); |
| } |
| |
| void RenderSVGImage::absoluteRects(Vector<IntRect>& rects, int, int, bool) |
| { |
| rects.append(absoluteClippedOverflowRect()); |
| } |
| |
| } |
| |
| #endif // ENABLE(SVG) |
