1 /*

     2  * Copyright (C) 2009 Google 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 are

     6  * met:

     7  *

     8  *     * Redistributions of source code must retain the above copyright

     9  * notice, this list of conditions and the following disclaimer.

    10  *     * Redistributions in binary form must reproduce the above

    11  * copyright notice, this list of conditions and the following disclaimer

    12  * in the documentation and/or other materials provided with the

    13  * distribution.

    14  *     * Neither the name of Google Inc. nor the names of its

    15  * contributors may be used to endorse or promote products derived from

    16  * this software without specific prior written permission.

    17  *

    18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

    21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

    22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

    24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

    25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    29  */

    30 

    31 #include "config.h"

    32 #include "WebImage.h"

    33 

    34 #include "Image.h"

    35 #include "ImageSource.h"

    36 #include "SharedBuffer.h"

    37 

    38 #include "WebData.h"

    39 #include "WebSize.h"

    40 

    41 #include <CoreGraphics/CGImage.h>

    42 

    43 #include <wtf/PassRefPtr.h>

    44 #include <wtf/RetainPtr.h>

    45 

    46 using namespace WebCore;

    47 

    48 namespace WebKit {

    49 

    50 WebImage WebImage::fromData(const WebData& data, const WebSize& desiredSize)

    51 {

    52     // FIXME: Do something like what WebImageSkia.cpp does to enumerate frames.

    53     // Not sure whether the CG decoder uses the same frame ordering rules (if so

    54     // we can just use the same logic).

    55 

    56     ImageSource source;

    57     source.setData(PassRefPtr<SharedBuffer>(data).get(), true);

    58     if (!source.isSizeAvailable())

    59         return WebImage();

    60 

    61     RetainPtr<CGImageRef> frame0(AdoptCF, source.createFrameAtIndex(0));

    62     if (!frame0)

    63         return WebImage();

    64 

    65     return WebImage(frame0.get());

    66 }

    67 

    68 void WebImage::reset()

    69 {

    70     CGImageRelease(m_imageRef);

    71     m_imageRef = 0;

    72 }

    73 

    74 void WebImage::assign(const WebImage& image)

    75 {

    76     assign(image.m_imageRef);

    77 }

    78 

    79 bool WebImage::isNull() const

    80 {

    81     return !m_imageRef;

    82 }

    83 

    84 WebSize WebImage::size() const

    85 {

    86     return WebSize(CGImageGetWidth(m_imageRef), CGImageGetHeight(m_imageRef));

    87 }

    88 

    89 WebImage::WebImage(const PassRefPtr<Image>& image)

    90     : m_imageRef(0)

    91 {

    92     NativeImagePtr p;

    93     if (image.get() && (p = image->nativeImageForCurrentFrame()))

    94         assign(p);

    95 }

    96 

    97 WebImage& WebImage::operator=(const PassRefPtr<Image>& image)

    98 {

    99     NativeImagePtr p;

   100     if (image.get() && (p = image->nativeImageForCurrentFrame()))

   101         assign(p);

   102     else

   103         reset();

   104     return *this;

   105 }

   106 

   107 void WebImage::assign(CGImageRef imageRef)

   108 {

   109     // Make sure to retain the imageRef first incase m_imageRef == imageRef.

   110     CGImageRetain(imageRef);

   111     CGImageRelease(m_imageRef);

   112     m_imageRef = imageRef;

   113 }

   114 

   115 } // namespace WebKit