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/*
* Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "RenderHTMLCanvas.h"
#include "CanvasRenderingContext.h"
#include "Document.h"
#include "Frame.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "HTMLCanvasElement.h"
#include "HTMLNames.h"
#include "Page.h"
#include "PaintInfo.h"
#include "RenderView.h"
namespace WebCore {
using namespace HTMLNames;
RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element)
: RenderReplaced(element, element->size())
{
view()->frameView()->setIsVisuallyNonEmpty();
}
bool RenderHTMLCanvas::requiresLayer() const
{
if (RenderReplaced::requiresLayer())
return true;
HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(node());
return canvas && canvas->renderingContext() && canvas->renderingContext()->isAccelerated();
}
void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
LayoutRect rect = contentBoxRect();
rect.moveBy(paintOffset);
if (Frame* frame = this->frame()) {
if (Page* page = frame->page()) {
if (paintInfo.phase == PaintPhaseForeground)
page->addRelevantRepaintedObject(this, rect);
}
}
bool useLowQualityScale = style()->imageRendering() == ImageRenderingOptimizeContrast;
static_cast<HTMLCanvasElement*>(node())->paint(paintInfo.context, rect, useLowQualityScale);
}
void RenderHTMLCanvas::canvasSizeChanged()
{
IntSize canvasSize = static_cast<HTMLCanvasElement*>(node())->size();
IntSize zoomedSize(canvasSize.width() * style()->effectiveZoom(), canvasSize.height() * style()->effectiveZoom());
if (zoomedSize == intrinsicSize())
return;
setIntrinsicSize(zoomedSize);
if (!parent())
return;
if (!preferredLogicalWidthsDirty())
setPreferredLogicalWidthsDirty(true);
LayoutSize oldSize = size();
updateLogicalWidth();
updateLogicalHeight();
if (oldSize == size())
return;
if (!selfNeedsLayout())
setNeedsLayout(true);
}
} // namespace WebCore
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