1/* 2 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "core/rendering/RenderHTMLCanvas.h" 28 29#include "core/html/HTMLCanvasElement.h" 30#include "core/html/canvas/CanvasRenderingContext.h" 31#include "core/page/Frame.h" 32#include "core/page/FrameView.h" 33#include "core/page/Page.h" 34#include "core/rendering/PaintInfo.h" 35#include "core/rendering/RenderView.h" 36 37namespace WebCore { 38 39using namespace HTMLNames; 40 41RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element) 42 : RenderReplaced(element, element->size()) 43{ 44 view()->frameView()->setIsVisuallyNonEmpty(); 45} 46 47bool RenderHTMLCanvas::requiresLayer() const 48{ 49 if (RenderReplaced::requiresLayer()) 50 return true; 51 52 HTMLCanvasElement* canvas = toHTMLCanvasElement(node()); 53 return canvas && canvas->renderingContext() && canvas->renderingContext()->isAccelerated(); 54} 55 56void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset) 57{ 58 LayoutRect rect = contentBoxRect(); 59 rect.moveBy(paintOffset); 60 61 if (Frame* frame = this->frame()) { 62 if (Page* page = frame->page()) { 63 if (paintInfo.phase == PaintPhaseForeground) 64 page->addRelevantRepaintedObject(this, rect); 65 } 66 } 67 68 bool useLowQualityScale = style()->imageRendering() == ImageRenderingOptimizeContrast; 69 toHTMLCanvasElement(node())->paint(paintInfo.context, rect, useLowQualityScale); 70} 71 72void RenderHTMLCanvas::canvasSizeChanged() 73{ 74 IntSize canvasSize = toHTMLCanvasElement(node())->size(); 75 LayoutSize zoomedSize(canvasSize.width() * style()->effectiveZoom(), canvasSize.height() * style()->effectiveZoom()); 76 77 if (zoomedSize == intrinsicSize()) 78 return; 79 80 setIntrinsicSize(zoomedSize); 81 82 if (!parent()) 83 return; 84 85 if (!preferredLogicalWidthsDirty()) 86 setPreferredLogicalWidthsDirty(true); 87 88 LayoutSize oldSize = size(); 89 updateLogicalWidth(); 90 updateLogicalHeight(); 91 if (oldSize == size()) 92 return; 93 94 if (!selfNeedsLayout()) 95 setNeedsLayout(); 96} 97 98} // namespace WebCore 99