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/frame/FrameView.h"
32 #include "core/frame/LocalFrame.h"
33 #include "core/page/Page.h"
34 #include "core/paint/HTMLCanvasPainter.h"
35 #include "core/rendering/PaintInfo.h"
36 #include "core/rendering/RenderView.h"
37
38 namespace blink {
39
40 using namespace HTMLNames;
41
RenderHTMLCanvas(HTMLCanvasElement * element)42 RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element)
43 : RenderReplaced(element, element->size())
44 {
45 view()->frameView()->setIsVisuallyNonEmpty();
46 }
47
layerTypeRequired() const48 LayerType RenderHTMLCanvas::layerTypeRequired() const
49 {
50 return NormalLayer;
51 }
52
paintReplaced(PaintInfo & paintInfo,const LayoutPoint & paintOffset)53 void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
54 {
55 HTMLCanvasPainter(*this).paintReplaced(paintInfo, paintOffset);
56 }
57
canvasSizeChanged()58 void RenderHTMLCanvas::canvasSizeChanged()
59 {
60 IntSize canvasSize = toHTMLCanvasElement(node())->size();
61 LayoutSize zoomedSize(canvasSize.width() * style()->effectiveZoom(), canvasSize.height() * style()->effectiveZoom());
62
63 if (zoomedSize == intrinsicSize())
64 return;
65
66 setIntrinsicSize(zoomedSize);
67
68 if (!parent())
69 return;
70
71 if (!preferredLogicalWidthsDirty())
72 setPreferredLogicalWidthsDirty();
73
74 LayoutSize oldSize = size();
75 updateLogicalWidth();
76 updateLogicalHeight();
77 if (oldSize == size())
78 return;
79
80 if (!selfNeedsLayout())
81 setNeedsLayout();
82 }
83
additionalCompositingReasons() const84 CompositingReasons RenderHTMLCanvas::additionalCompositingReasons() const
85 {
86 HTMLCanvasElement* canvas = toHTMLCanvasElement(node());
87 if (canvas->renderingContext() && canvas->renderingContext()->isAccelerated())
88 return CompositingReasonCanvas;
89
90 return CompositingReasonNone;
91 }
92
93 } // namespace blink
94