2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
3 * Copyright (C) 2008-2009 Torch Mobile, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #ifndef JPEGImageDecoder_h
28 #define JPEGImageDecoder_h
30 #include "platform/image-decoders/ImageDecoder.h"
32 #include "wtf/Noncopyable.h"
33 #include "wtf/OwnPtr.h"
37 class JPEGImageReader;
39 // This class decodes the JPEG image format.
40 class PLATFORM_EXPORT JPEGImageDecoder : public ImageDecoder {
41 WTF_MAKE_NONCOPYABLE(JPEGImageDecoder);
43 JPEGImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption, size_t maxDecodedBytes);
44 virtual ~JPEGImageDecoder();
47 virtual String filenameExtension() const OVERRIDE { return "jpg"; }
48 virtual bool isSizeAvailable() OVERRIDE;
49 virtual bool hasColorProfile() const OVERRIDE { return m_hasColorProfile; }
50 virtual IntSize decodedSize() const OVERRIDE { return m_decodedSize; }
51 virtual bool setSize(unsigned width, unsigned height) OVERRIDE;
52 virtual ImageFrame* frameBufferAtIndex(size_t) OVERRIDE;
53 // CAUTION: setFailed() deletes |m_reader|. Be careful to avoid
54 // accessing deleted memory, especially when calling this from inside
56 virtual bool setFailed() OVERRIDE;
58 bool outputScanlines();
59 unsigned desiredScaleNumerator() const;
62 void setOrientation(ImageOrientation orientation) { m_orientation = orientation; }
63 void setHasColorProfile(bool hasColorProfile) { m_hasColorProfile = hasColorProfile; }
64 void setDecodedSize(unsigned width, unsigned height);
67 // Decodes the image. If |onlySize| is true, stops decoding after
68 // calculating the image size. If decoding fails but there is no more
69 // data coming, sets the "decode failure" flag.
70 void decode(bool onlySize);
72 OwnPtr<JPEGImageReader> m_reader;
73 IntSize m_decodedSize;
74 bool m_hasColorProfile;
77 } // namespace WebCore