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 "RenderHTMLCanvas.h"
28
29 #include "Document.h"
30 #include "GraphicsContext.h"
31 #include "HTMLCanvasElement.h"
32 #include "HTMLNames.h"
33 #include "RenderView.h"
34 #include "FrameView.h"
35
36 namespace WebCore {
37
38 using namespace HTMLNames;
39
RenderHTMLCanvas(HTMLCanvasElement * element)40 RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element)
41 : RenderReplaced(element, element->size())
42 {
43 view()->frameView()->setIsVisuallyNonEmpty();
44 }
45
requiresLayer() const46 bool RenderHTMLCanvas::requiresLayer() const
47 {
48 if (RenderReplaced::requiresLayer())
49 return true;
50
51 #if ENABLE(3D_CANVAS)
52 HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(node());
53 return canvas && canvas->is3D();
54 #else
55 return false;
56 #endif
57 }
58
paintReplaced(PaintInfo & paintInfo,int tx,int ty)59 void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, int tx, int ty)
60 {
61 IntRect rect = contentBoxRect();
62 rect.move(tx, ty);
63 static_cast<HTMLCanvasElement*>(node())->paint(paintInfo.context, rect);
64 }
65
canvasSizeChanged()66 void RenderHTMLCanvas::canvasSizeChanged()
67 {
68 IntSize canvasSize = static_cast<HTMLCanvasElement*>(node())->size();
69 IntSize zoomedSize(canvasSize.width() * style()->effectiveZoom(), canvasSize.height() * style()->effectiveZoom());
70
71 if (zoomedSize == intrinsicSize())
72 return;
73
74 setIntrinsicSize(zoomedSize);
75
76 if (!parent())
77 return;
78
79 if (!prefWidthsDirty())
80 setPrefWidthsDirty(true);
81
82 IntSize oldSize = size();
83 calcWidth();
84 calcHeight();
85 if (oldSize == size())
86 return;
87
88 if (!selfNeedsLayout())
89 setNeedsLayout(true);
90 }
91
92 } // namespace WebCore
93