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 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 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 "RenderElement.h"
30
31namespace WebCore {
32
33CSSCanvasValue::~CSSCanvasValue()
34{
35 if (m_element)
36 m_element->removeObserver(m_canvasObserver);
37}
38
39String CSSCanvasValue::customCSSText() const
40{
41 return makeString("-webkit-canvas(", m_name, ')');
42}
43
44void CSSCanvasValue::canvasChanged(HTMLCanvasElement&, const FloatRect& changedRect)
45{
46 IntRect imageChangeRect = enclosingIntRect(changedRect);
47 for (auto it = clients().begin(), end = clients().end(); it != end; ++it)
48 it->key->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect);
49}
50
51void CSSCanvasValue::canvasResized(HTMLCanvasElement&)
52{
53 for (auto it = clients().begin(), end = clients().end(); it != end; ++it)
54 it->key->imageChanged(static_cast<WrappedImagePtr>(this));
55}
56
57void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement& element)
58{
59 ASSERT_UNUSED(&element, &element == m_element);
60 m_element = nullptr;
61}
62
63FloatSize CSSCanvasValue::fixedSize(const RenderElement* renderer)
64{
65 if (HTMLCanvasElement* elt = element(renderer->document()))
66 return FloatSize(elt->width(), elt->height());
67 return FloatSize();
68}
69
70HTMLCanvasElement* CSSCanvasValue::element(Document& document)
71{
72 if (!m_element) {
73 m_element = document.getCSSCanvasElement(m_name);
74 if (!m_element)
75 return nullptr;
76 m_element->addObserver(m_canvasObserver);
77 }
78 return m_element;
79}
80
81RefPtr<Image> CSSCanvasValue::image(RenderElement* renderer, const FloatSize& /*size*/)
82{
83 ASSERT(clients().contains(renderer));
84 HTMLCanvasElement* element = this->element(renderer->document());
85 if (!element || !element->buffer())
86 return nullptr;
87 return element->copiedImage();
88}
89
90bool CSSCanvasValue::equals(const CSSCanvasValue& other) const
91{
92 return m_name == other.m_name;
93}
94
95} // namespace WebCore
96