diff -r 000000000000 -r 4f2f89ce4247 WebCore/css/CSSCanvasValue.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/css/CSSCanvasValue.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2008 Apple Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "CSSCanvasValue.h"
+
+#include "ImageBuffer.h"
+#include "RenderObject.h"
+
+namespace WebCore {
+
+CSSCanvasValue::~CSSCanvasValue()
+{
+    if (m_element)
+        m_element->setObserver(0);
+}
+
+String CSSCanvasValue::cssText() const
+{
+    String result = "-webkit-canvas(";
+    result += m_name  + ")";
+    return result;
+}
+
+void CSSCanvasValue::canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect)
+{
+    IntRect imageChangeRect = enclosingIntRect(changedRect);
+    RenderObjectSizeCountMap::const_iterator end = m_clients.end();
+    for (RenderObjectSizeCountMap::const_iterator curr = m_clients.begin(); curr != end; ++curr)
+        curr->first->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect);
+}
+
+void CSSCanvasValue::canvasResized(HTMLCanvasElement*)
+{
+    RenderObjectSizeCountMap::const_iterator end = m_clients.end();
+    for (RenderObjectSizeCountMap::const_iterator curr = m_clients.begin(); curr != end; ++curr)
+        curr->first->imageChanged(static_cast<WrappedImagePtr>(this));
+}
+
+void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement* element)
+{
+    ASSERT(element == m_element);
+    if (element == m_element)
+        m_element = 0;
+}
+
+IntSize CSSCanvasValue::fixedSize(const RenderObject* renderer)
+{
+    if (HTMLCanvasElement* elt = element(renderer->document()))
+        return IntSize(elt->width(), elt->height());
+    return IntSize();
+}
+
+HTMLCanvasElement* CSSCanvasValue::element(Document* document)
+{
+     if (!m_element) {
+        m_element = document->getCSSCanvasElement(m_name);
+        if (!m_element)
+            return 0;
+        m_element->setObserver(this);
+    }
+    return m_element;
+}
+
+Image* CSSCanvasValue::image(RenderObject* renderer, const IntSize& /*size*/)
+{
+    ASSERT(m_clients.contains(renderer));
+    HTMLCanvasElement* elt = element(renderer->document());
+    if (!elt || !elt->buffer())
+        return 0;
+    return elt->buffer()->image();
+}
+
+} // namespace WebCore