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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 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 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 "GraphicsContext.h"
#include "HTMLCanvasElement.h"
#include "HTMLNames.h"
#include "ImageQualityController.h"
#include "LocalFrame.h"
#include "LocalFrameView.h"
#include "Page.h"
#include "PaintInfo.h"
#include "RenderBoxInlines.h"
#include "RenderBoxModelObjectInlines.h"
#include "RenderLayer.h"
#include "RenderLayerBacking.h"
#include "RenderStyleInlines.h"
#include "RenderView.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
using namespace HTMLNames;
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(RenderHTMLCanvas);
RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement& element, RenderStyle&& style)
: RenderReplaced(Type::HTMLCanvas, element, WTFMove(style), element.size())
{
ASSERT(isRenderHTMLCanvas());
}
RenderHTMLCanvas::~RenderHTMLCanvas() = default;
HTMLCanvasElement& RenderHTMLCanvas::canvasElement() const
{
return downcast<HTMLCanvasElement>(nodeForNonAnonymous());
}
bool RenderHTMLCanvas::requiresLayer() const
{
if (RenderReplaced::requiresLayer())
return true;
return canvasCompositingStrategy(*this) != CanvasPaintedToEnclosingLayer;
}
void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
GraphicsContext& context = paintInfo.context();
LayoutRect contentBoxRect = this->contentBoxRect();
if (context.detectingContentfulPaint()) {
if (!context.contentfulPaintDetected() && canvasElement().renderingContext())
context.setContentfulPaintDetected();
return;
}
contentBoxRect.moveBy(paintOffset);
LayoutRect replacedContentRect = this->replacedContentRect();
replacedContentRect.moveBy(paintOffset);
// Not allowed to overflow the content box.
bool clip = !contentBoxRect.contains(replacedContentRect);
GraphicsContextStateSaver stateSaver(paintInfo.context(), clip);
if (clip)
paintInfo.context().clip(snappedIntRect(contentBoxRect));
if (paintInfo.phase == PaintPhase::Foreground)
page().addRelevantRepaintedObject(*this, intersection(replacedContentRect, contentBoxRect));
InterpolationQualityMaintainer interpolationMaintainer(context, ImageQualityController::interpolationQualityFromStyle(style()));
canvasElement().setIsSnapshotting(paintInfo.paintBehavior.contains(PaintBehavior::Snapshotting));
canvasElement().paint(context, replacedContentRect);
canvasElement().setIsSnapshotting(false);
}
void RenderHTMLCanvas::canvasSizeChanged()
{
IntSize canvasSize = canvasElement().size();
LayoutSize zoomedSize(canvasSize.width() * style().usedZoom(), canvasSize.height() * style().usedZoom());
if (zoomedSize == intrinsicSize())
return;
setIntrinsicSize(zoomedSize);
if (!parent())
return;
setNeedsLayoutIfNeededAfterIntrinsicSizeChange();
}
} // namespace WebCore
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