| /* |
| Copyright (C) 2006 Alexander Kellett <lypanov@kde.org> |
| Copyright (C) 2006 Apple Computer, Inc. |
| Copyright (C) 2007 Nikolas Zimmermann <zimmermann@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., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, 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 "SVGImageElement.h" |
| #include "SVGLength.h" |
| #include "SVGPreserveAspectRatio.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(origDestHeight / 2 - destRect.height() / 2); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setY(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(origDestWidth / 2 - destRect.width() / 2); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| destRect.setX(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(image()->height() / 2 - srcRect.height() / 2); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| srcRect.setY(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(image()->width() / 2 - srcRect.width() / 2); |
| break; |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID: |
| case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX: |
| srcRect.setX(image()->width() - srcRect.width()); |
| break; |
| } |
| } |
| } |
| } |
| |
| void RenderSVGImage::paint(PaintInfo& paintInfo, int parentX, int parentY) |
| { |
| if (paintInfo.context->paintingDisabled() || (paintInfo.phase != PaintPhaseForeground) || style()->visibility() == HIDDEN) |
| return; |
| |
| paintInfo.context->save(); |
| paintInfo.context->concatCTM(AffineTransform().translate(parentX, parentY)); |
| paintInfo.context->concatCTM(localTransform()); |
| paintInfo.context->concatCTM(translationForAttributes()); |
| |
| FloatRect boundingBox = FloatRect(0, 0, width(), height()); |
| |
| SVGElement* svgElement = static_cast<SVGElement*>(element()); |
| ASSERT(svgElement && svgElement->document() && svgElement->isStyled()); |
| |
| SVGStyledElement* styledElement = static_cast<SVGStyledElement*>(svgElement); |
| const SVGRenderStyle* svgStyle = style()->svgStyle(); |
| |
| AtomicString filterId(SVGURIReference::getTarget(svgStyle->filter())); |
| AtomicString clipperId(SVGURIReference::getTarget(svgStyle->clipPath())); |
| AtomicString maskerId(SVGURIReference::getTarget(svgStyle->maskElement())); |
| |
| #if ENABLE(SVG_EXPERIMENTAL_FEATURES) |
| SVGResourceFilter* filter = getFilterById(document(), filterId); |
| #endif |
| SVGResourceClipper* clipper = getClipperById(document(), clipperId); |
| SVGResourceMasker* masker = getMaskerById(document(), maskerId); |
| |
| #if ENABLE(SVG_EXPERIMENTAL_FEATURES) |
| if (filter) |
| filter->prepareFilter(paintInfo.context, boundingBox); |
| else if (!filterId.isEmpty()) |
| svgElement->document()->accessSVGExtensions()->addPendingResource(filterId, styledElement); |
| #endif |
| |
| if (clipper) { |
| clipper->addClient(styledElement); |
| clipper->applyClip(paintInfo.context, boundingBox); |
| } else if (!clipperId.isEmpty()) |
| svgElement->document()->accessSVGExtensions()->addPendingResource(clipperId, styledElement); |
| |
| if (masker) { |
| masker->addClient(styledElement); |
| masker->applyMask(paintInfo.context, boundingBox); |
| } else if (!maskerId.isEmpty()) |
| svgElement->document()->accessSVGExtensions()->addPendingResource(maskerId, styledElement); |
| |
| float opacity = style()->opacity(); |
| if (opacity < 1.0f) { |
| paintInfo.context->clip(enclosingIntRect(boundingBox)); |
| paintInfo.context->beginTransparencyLayer(opacity); |
| } |
| |
| PaintInfo pi(paintInfo); |
| pi.rect = absoluteTransform().inverse().mapRect(pi.rect); |
| |
| SVGImageElement* imageElt = static_cast<SVGImageElement*>(node()); |
| |
| FloatRect destRect(m_x, m_y, contentWidth(), contentHeight()); |
| FloatRect srcRect(0, 0, image()->width(), image()->height()); |
| |
| if (imageElt->preserveAspectRatio()->align() != SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE) |
| adjustRectsForAspectRatio(destRect, srcRect, imageElt->preserveAspectRatio()); |
| |
| paintInfo.context->drawImage(image(), destRect, srcRect); |
| |
| #if ENABLE(SVG_EXPERIMENTAL_FEATURES) |
| if (filter) |
| filter->applyFilter(paintInfo.context, boundingBox); |
| #endif |
| |
| if (opacity < 1.0f) |
| paintInfo.context->endTransparencyLayer(); |
| |
| paintInfo.context->restore(); |
| } |
| |
| bool RenderSVGImage::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int _x, int _y, int _tx, int _ty, 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); |
| translationForAttributes().inverse().map(localX, localY, &localX, &localY); |
| |
| if (hitRules.canHitFill) { |
| if (FloatRect(0.0f, 0.0f, m_width, m_height).contains(narrowPrecisionToFloat(localX), narrowPrecisionToFloat(localY))) { |
| updateHitTestResult(result, IntPoint(_x, _y)); |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| bool RenderSVGImage::requiresLayer() |
| { |
| return false; |
| } |
| |
| FloatRect RenderSVGImage::relativeBBox(bool includeStroke) const |
| { |
| SVGImageElement* image = static_cast<SVGImageElement*>(node()); |
| return FloatRect(image->x().value(), image->y().value(), width(), height()); |
| } |
| |
| 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()); |
| } |
| |
| IntRect RenderSVGImage::absoluteClippedOverflowRect() |
| { |
| FloatRect repaintRect = relativeBBox(true); |
| repaintRect = absoluteTransform().mapRect(repaintRect); |
| |
| #if ENABLE(SVG_EXPERIMENTAL_FEATURES) |
| // Filters can expand the bounding box |
| SVGResourceFilter* filter = getFilterById(document(), SVGURIReference::getTarget(style()->svgStyle()->filter())); |
| if (filter) |
| repaintRect.unite(filter->filterBBoxForItemBBox(repaintRect)); |
| #endif |
| |
| if (!repaintRect.isEmpty()) |
| repaintRect.inflate(1); // inflate 1 pixel for antialiasing |
| |
| return enclosingIntRect(repaintRect); |
| } |
| |
| void RenderSVGImage::absoluteRects(Vector<IntRect>& rects, int, int, bool) |
| { |
| rects.append(absoluteClippedOverflowRect()); |
| } |
| |
| AffineTransform RenderSVGImage::translationForAttributes() |
| { |
| SVGImageElement *image = static_cast<SVGImageElement*>(node()); |
| return AffineTransform().translate(image->x().value(), image->y().value()); |
| } |
| |
| } |
| |
| #endif // ENABLE(SVG) |
