1/*
2 * Copyright (C) 2010 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
6 * are met:
7 *
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.
13 * 3. Neither the name of Apple Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#pragma once
30
31#include "ScalableImageDecoder.h"
32
33#if USE(WEBP)
34
35#include "webp/decode.h"
36#include "webp/demux.h"
37
38namespace WebCore {
39
40class WEBPImageDecoder final : public ScalableImageDecoder {
41public:
42 static Ref<ScalableImageDecoder> create(AlphaOption alphaOption, GammaAndColorProfileOption gammaAndColorProfileOption)
43 {
44 return adoptRef(*new WEBPImageDecoder(alphaOption, gammaAndColorProfileOption));
45 }
46
47 virtual ~WEBPImageDecoder();
48
49 String filenameExtension() const override { return "webp"_s; }
50 void setData(SharedBuffer&, bool) final;
51 ScalableImageDecoderFrame* frameBufferAtIndex(size_t index) override;
52 RepetitionCount repetitionCount() const override;
53 size_t frameCount() const override { return m_frameCount; }
54 void clearFrameBufferCache(size_t) override;
55
56private:
57 WEBPImageDecoder(AlphaOption, GammaAndColorProfileOption);
58 void tryDecodeSize(bool) override { parseHeader(); }
59 void decode(size_t, bool);
60 void decodeFrame(size_t, WebPDemuxer*);
61 void parseHeader();
62 bool initFrameBuffer(size_t, const WebPIterator*);
63 void applyPostProcessing(size_t, WebPIDecoder*, WebPDecBuffer&, bool);
64 size_t findFirstRequiredFrameToDecode(size_t, WebPDemuxer*);
65
66 int m_repetitionCount { 0 };
67 size_t m_frameCount { 0 };
68 int m_formatFlags { 0 };
69 bool m_headerParsed { false };
70};
71
72} // namespace WebCore
73
74#endif
75