1/*
2 Large image displaying library.
3
4 Copyright (C) 2004 Maks Orlovich (maksim@kde.org)
5
6 Permission is hereby granted, free of charge, to any person obtaining a copy
7 of this software and associated documentation files (the "Software"), to deal
8 in the Software without restriction, including without limitation the rights
9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 copies of the Software, and to permit persons to whom the Software is
11 furnished to do so, subject to the following conditions:
12
13 The above copyright notice and this permission notice shall be included in
14 all copies or substantial portions of the Software.
15
16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
20 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22
23*/
24
25#ifndef IMAGE_LOADER_PROVIDER_H
26#define IMAGE_LOADER_PROVIDER_H
27
28#include <QByteArray>
29
30namespace khtmlImLoad
31{
32
33class ImageLoader;
34/**
35To register new image formats, new copies of ImageLoaderProvider's must be
36created and registered with ImageManager::loaderDatabase().
37*/
38class ImageLoaderProvider
39{
40public:
41 virtual ~ImageLoaderProvider() {}
42 enum Type {
43 Efficient,
44 Foreign
45 };
46
47 /**
48 Returns the type of the loader. An "efficient" loader does not duplicate any data, and will therefore be preferred;
49 while a "foreign" loader has to duplicate a large amount of image data to fit in w/the original
50 framework, and should therefore only be used when a better loader is not available
51 */
52 virtual Type type() = 0;
53
54 /**
55 Creates a loader for an image format that can decode a file starting with given data, or 0 if that's not possible.
56 */
57 virtual ImageLoader *loaderFor(const QByteArray &prefix) = 0;
58};
59
60}
61
62#endif
63