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 34 CSSCanvasValue::~CSSCanvasValue() 35 { 36 if (m_element) 37 m_element->removeObserver(this); 38 } 39 40 String CSSCanvasValue::cssText() const 41 { 42 String result = "-webkit-canvas("; 43 result += m_name + ")"; 44 return result; 45 } 46 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 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 62 void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement* element) 63 { 64 ASSERT_UNUSED(element, element == m_element); 65 m_element = 0; 66 } 67 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 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 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