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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->setObserver(0);
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(element == m_element);
65     if (element == m_element)
66         m_element = 0;
67 }
68 
fixedSize(const RenderObject * renderer)69 IntSize CSSCanvasValue::fixedSize(const RenderObject* renderer)
70 {
71     if (HTMLCanvasElement* elt = element(renderer->document()))
72         return IntSize(elt->width(), elt->height());
73     return IntSize();
74 }
75 
element(Document * document)76 HTMLCanvasElement* CSSCanvasValue::element(Document* document)
77 {
78      if (!m_element) {
79         m_element = document->getCSSCanvasElement(m_name);
80         if (!m_element)
81             return 0;
82         m_element->setObserver(this);
83     }
84     return m_element;
85 }
86 
image(RenderObject * renderer,const IntSize &)87 Image* CSSCanvasValue::image(RenderObject* renderer, const IntSize& /*size*/)
88 {
89     ASSERT(m_clients.contains(renderer));
90     HTMLCanvasElement* elt = element(renderer->document());
91     if (!elt || !elt->buffer())
92         return 0;
93     return elt->buffer()->image();
94 }
95 
96 } // namespace WebCore
97