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->setObserver(0);

    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(element == m_element);

    65     if (element == m_element)

    66         m_element = 0;

    67 }

    68 

    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 

    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 

    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