1/*
2 * Copyright (C) 2004, 2005, 2006 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 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 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#pragma once
27
28#include "ImageTypes.h"
29
30namespace WebCore {
31
32class Image;
33class IntRect;
34
35// Interface for notification about changes to an image, including decoding,
36// drawing, and animating.
37class ImageObserver {
38protected:
39 virtual ~ImageObserver() = default;
40public:
41 virtual URL sourceUrl() const = 0;
42 virtual String mimeType() const = 0;
43 virtual long long expectedContentLength() const = 0;
44
45 virtual void encodedDataStatusChanged(const Image&, EncodedDataStatus) { };
46 virtual void decodedSizeChanged(const Image&, long long delta) = 0;
47
48 virtual void didDraw(const Image&) = 0;
49
50 virtual bool canDestroyDecodedData(const Image&) = 0;
51 virtual void imageFrameAvailable(const Image&, ImageAnimatingState, const IntRect* changeRect = nullptr, DecodingStatus = DecodingStatus::Invalid) = 0;
52 virtual void changedInRect(const Image&, const IntRect* changeRect = nullptr) = 0;
53};
54
55}
56