author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:28:30 +0100 | |
branch | RCL_3 |
changeset 49 | 919f36ff910f |
parent 48 | 79859ed3eea9 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
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* Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include "Image.h" |
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#include "AffineTransform.h" |
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#include "GraphicsContext.h" |
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#include "IntRect.h" |
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#include "MIMETypeRegistry.h" |
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#include <math.h> |
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#if PLATFORM(CG) |
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#include <CoreFoundation/CoreFoundation.h> |
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#endif |
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namespace WebCore { |
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Image::Image(ImageObserver* observer) |
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: m_imageObserver(observer) |
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{ |
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} |
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Image::~Image() |
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{ |
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} |
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bool Image::supportsType(const String& type) |
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{ |
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return MIMETypeRegistry::isSupportedImageResourceMIMEType(type); |
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} |
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bool Image::isNull() const |
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{ |
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return size().isEmpty(); |
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} |
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bool Image::setData(PassRefPtr<SharedBuffer> data, bool allDataReceived) |
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{ |
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m_data = data; |
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if (!m_data.get()) |
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return true; |
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int length = m_data->size(); |
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if (!length) |
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return true; |
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#ifdef kImageBytesCutoff |
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// This is a hack to help with testing display of partially-loaded images. |
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// To enable it, define kImageBytesCutoff to be a size smaller than that of the image files |
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// being loaded. They'll never finish loading. |
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if (length > kImageBytesCutoff) { |
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length = kImageBytesCutoff; |
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allDataReceived = false; |
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} |
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#endif |
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return dataChanged(allDataReceived); |
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} |
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IntRect Image::rect() const |
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{ |
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return IntRect(IntPoint(), size()); |
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} |
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int Image::width() const |
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{ |
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return size().width(); |
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} |
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int Image::height() const |
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{ |
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return size().height(); |
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} |
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void Image::fillWithSolidColor(GraphicsContext* ctxt, const FloatRect& dstRect, const Color& color, CompositeOperator op) |
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{ |
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if (color.alpha() <= 0) |
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return; |
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ctxt->save(); |
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ctxt->setCompositeOperation(!color.hasAlpha() && op == CompositeSourceOver ? CompositeCopy : op); |
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ctxt->fillRect(dstRect, color); |
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ctxt->restore(); |
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} |
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static inline FloatSize calculatePatternScale(const FloatRect& dstRect, const FloatRect& srcRect, Image::TileRule hRule, Image::TileRule vRule) |
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{ |
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float scaleX = 1.0f, scaleY = 1.0f; |
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if (hRule == Image::StretchTile) |
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scaleX = dstRect.width() / srcRect.width(); |
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if (vRule == Image::StretchTile) |
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scaleY = dstRect.height() / srcRect.height(); |
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if (hRule == Image::RepeatTile) |
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scaleX = scaleY; |
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if (vRule == Image::RepeatTile) |
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scaleY = scaleX; |
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return FloatSize(scaleX, scaleY); |
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} |
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void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& destRect, const FloatPoint& srcPoint, const FloatSize& scaledTileSize, CompositeOperator op) |
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{ |
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if (!nativeImageForCurrentFrame()) |
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return; |
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if (mayFillWithSolidColor()) { |
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fillWithSolidColor(ctxt, destRect, solidColor(), op); |
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return; |
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} |
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FloatSize intrinsicTileSize = size(); |
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FloatSize scale(scaledTileSize.width() / intrinsicTileSize.width(), |
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scaledTileSize.height() / intrinsicTileSize.height()); |
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AffineTransform patternTransform = AffineTransform().scale(scale.width(), scale.height()); |
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|
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FloatRect oneTileRect; |
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oneTileRect.setX(destRect.x() + fmodf(fmodf(-srcPoint.x(), scaledTileSize.width()) - scaledTileSize.width(), scaledTileSize.width())); |
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oneTileRect.setY(destRect.y() + fmodf(fmodf(-srcPoint.y(), scaledTileSize.height()) - scaledTileSize.height(), scaledTileSize.height())); |
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oneTileRect.setSize(scaledTileSize); |
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|
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// Check and see if a single draw of the image can cover the entire area we are supposed to tile. |
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if (oneTileRect.contains(destRect)) { |
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FloatRect visibleSrcRect; |
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visibleSrcRect.setX((destRect.x() - oneTileRect.x()) / scale.width()); |
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visibleSrcRect.setY((destRect.y() - oneTileRect.y()) / scale.height()); |
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visibleSrcRect.setWidth(destRect.width() / scale.width()); |
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visibleSrcRect.setHeight(destRect.height() / scale.height()); |
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draw(ctxt, destRect, visibleSrcRect, op); |
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return; |
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} |
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|
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FloatRect tileRect(FloatPoint(), intrinsicTileSize); |
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drawPattern(ctxt, tileRect, patternTransform, oneTileRect.location(), op, destRect); |
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|
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startAnimation(); |
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} |
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|
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// FIXME: Merge with the other drawTiled eventually, since we need a combination of both for some things. |
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void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& dstRect, const FloatRect& srcRect, TileRule hRule, TileRule vRule, CompositeOperator op) |
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{ |
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if (!nativeImageForCurrentFrame()) |
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return; |
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|
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if (mayFillWithSolidColor()) { |
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fillWithSolidColor(ctxt, dstRect, solidColor(), op); |
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return; |
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} |
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|
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// FIXME: We do not support 'round' yet. For now just map it to 'repeat'. |
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if (hRule == RoundTile) |
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hRule = RepeatTile; |
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if (vRule == RoundTile) |
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vRule = RepeatTile; |
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|
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FloatSize scale = calculatePatternScale(dstRect, srcRect, hRule, vRule); |
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AffineTransform patternTransform = AffineTransform().scale(scale.width(), scale.height()); |
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|
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// We want to construct the phase such that the pattern is centered (when stretch is not |
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// set for a particular rule). |
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float hPhase = scale.width() * srcRect.x(); |
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float vPhase = scale.height() * srcRect.y(); |
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if (hRule == Image::RepeatTile) |
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hPhase -= fmodf(dstRect.width(), scale.width() * srcRect.width()) / 2.0f; |
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if (vRule == Image::RepeatTile) |
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vPhase -= fmodf(dstRect.height(), scale.height() * srcRect.height()) / 2.0f; |
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FloatPoint patternPhase(dstRect.x() - hPhase, dstRect.y() - vPhase); |
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|
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drawPattern(ctxt, srcRect, patternTransform, patternPhase, op, dstRect); |
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|
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startAnimation(); |
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} |
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} |