1 /*
2 * Copyright (C) 2008 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 "CSSCanvasValue.h"
28
29 #include "ImageBuffer.h"
30 #include "RenderObject.h"
31
32 namespace WebCore {
33
~CSSCanvasValue()34 CSSCanvasValue::~CSSCanvasValue()
35 {
36 if (m_element)
37 m_element->removeObserver(this);
38 }
39
cssText() const40 String CSSCanvasValue::cssText() const
41 {
42 String result = "-webkit-canvas(";
43 result += m_name + ")";
44 return result;
45 }
46
canvasChanged(HTMLCanvasElement *,const FloatRect & changedRect)47 void CSSCanvasValue::canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect)
48 {
49 IntRect imageChangeRect = enclosingIntRect(changedRect);
50 RenderObjectSizeCountMap::const_iterator end = m_clients.end();
51 for (RenderObjectSizeCountMap::const_iterator curr = m_clients.begin(); curr != end; ++curr)
52 curr->first->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect);
53 }
54
canvasResized(HTMLCanvasElement *)55 void CSSCanvasValue::canvasResized(HTMLCanvasElement*)
56 {
57 RenderObjectSizeCountMap::const_iterator end = m_clients.end();
58 for (RenderObjectSizeCountMap::const_iterator curr = m_clients.begin(); curr != end; ++curr)
59 curr->first->imageChanged(static_cast<WrappedImagePtr>(this));
60 }
61
canvasDestroyed(HTMLCanvasElement * element)62 void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement* element)
63 {
64 ASSERT_UNUSED(element, element == m_element);
65 m_element = 0;
66 }
67
fixedSize(const RenderObject * renderer)68 IntSize CSSCanvasValue::fixedSize(const RenderObject* renderer)
69 {
70 if (HTMLCanvasElement* elt = element(renderer->document()))
71 return IntSize(elt->width(), elt->height());
72 return IntSize();
73 }
74
element(Document * document)75 HTMLCanvasElement* CSSCanvasValue::element(Document* document)
76 {
77 if (!m_element) {
78 m_element = document->getCSSCanvasElement(m_name);
79 if (!m_element)
80 return 0;
81 m_element->addObserver(this);
82 }
83 return m_element;
84 }
85
image(RenderObject * renderer,const IntSize &)86 PassRefPtr<Image> CSSCanvasValue::image(RenderObject* renderer, const IntSize& /*size*/)
87 {
88 ASSERT(m_clients.contains(renderer));
89 HTMLCanvasElement* elt = element(renderer->document());
90 if (!elt || !elt->buffer())
91 return 0;
92 return elt->copiedImage();
93 }
94
95 } // namespace WebCore
96