| /* |
| * 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 "core/rendering/RenderHTMLCanvas.h" |
| |
| #include "core/html/HTMLCanvasElement.h" |
| #include "core/html/canvas/CanvasRenderingContext.h" |
| #include "core/frame/FrameView.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/page/Page.h" |
| #include "core/rendering/PaintInfo.h" |
| #include "core/rendering/RenderView.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element) |
| : RenderReplaced(element, element->size()) |
| { |
| view()->frameView()->setIsVisuallyNonEmpty(); |
| } |
| |
| LayerType RenderHTMLCanvas::layerTypeRequired() const |
| { |
| return NormalLayer; |
| } |
| |
| void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| { |
| GraphicsContext* context = paintInfo.context; |
| |
| LayoutRect contentRect = contentBoxRect(); |
| contentRect.moveBy(paintOffset); |
| LayoutRect paintRect = replacedContentRect(); |
| paintRect.moveBy(paintOffset); |
| |
| bool clip = !contentRect.contains(paintRect); |
| if (clip) { |
| // Not allowed to overflow the content box. |
| paintInfo.context->save(); |
| paintInfo.context->clip(pixelSnappedIntRect(contentRect)); |
| } |
| |
| // FIXME: InterpolationNone should be used if ImageRenderingOptimizeContrast is set. |
| // See bug for more details: crbug.com/353716. |
| InterpolationQuality interpolationQuality = style()->imageRendering() == ImageRenderingOptimizeContrast ? InterpolationLow : CanvasDefaultInterpolationQuality; |
| InterpolationQuality previousInterpolationQuality = context->imageInterpolationQuality(); |
| context->setImageInterpolationQuality(interpolationQuality); |
| toHTMLCanvasElement(node())->paint(context, paintRect); |
| context->setImageInterpolationQuality(previousInterpolationQuality); |
| |
| if (clip) |
| context->restore(); |
| } |
| |
| void RenderHTMLCanvas::canvasSizeChanged() |
| { |
| IntSize canvasSize = toHTMLCanvasElement(node())->size(); |
| LayoutSize zoomedSize(canvasSize.width() * style()->effectiveZoom(), canvasSize.height() * style()->effectiveZoom()); |
| |
| if (zoomedSize == intrinsicSize()) |
| return; |
| |
| setIntrinsicSize(zoomedSize); |
| |
| if (!parent()) |
| return; |
| |
| if (!preferredLogicalWidthsDirty()) |
| setPreferredLogicalWidthsDirty(); |
| |
| LayoutSize oldSize = size(); |
| updateLogicalWidth(); |
| updateLogicalHeight(); |
| if (oldSize == size()) |
| return; |
| |
| if (!selfNeedsLayout()) |
| setNeedsLayoutAndFullPaintInvalidation(); |
| } |
| |
| CompositingReasons RenderHTMLCanvas::additionalCompositingReasons(CompositingTriggerFlags triggers) const |
| { |
| if (!(triggers & CanvasTrigger)) |
| return CompositingReasonNone; |
| |
| HTMLCanvasElement* canvas = toHTMLCanvasElement(node()); |
| if (canvas->renderingContext() && canvas->renderingContext()->isAccelerated()) |
| return CompositingReasonCanvas; |
| |
| return CompositingReasonNone; |
| } |
| |
| } // namespace WebCore |