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1 | |
2 /* | |
3 * Copyright 2008 The Android Open Source Project | |
4 * | |
5 * Use of this source code is governed by a BSD-style license that can be | |
6 * found in the LICENSE file. | |
7 */ | |
8 | |
9 | |
10 #ifndef SkMovie_DEFINED | |
11 #define SkMovie_DEFINED | |
12 | |
13 #include "SkRefCnt.h" | |
14 #include "SkCanvas.h" | |
15 | |
16 class SkStreamRewindable; | |
17 | |
18 class SkMovie : public SkRefCnt { | |
19 public: | |
20 | |
21 | |
22 /** Try to create a movie from the stream. If the stream format is not | |
23 supported, return NULL. | |
24 */ | |
25 static SkMovie* DecodeStream(SkStreamRewindable*); | |
26 /** Try to create a movie from the specified file path. If the file is not | |
27 found, or the format is not supported, return NULL. If a movie is | |
28 returned, the stream may be retained by the movie (via ref()) until | |
29 the movie is finished with it (by calling unref()). | |
30 */ | |
31 static SkMovie* DecodeFile(const char path[]); | |
32 /** Try to create a movie from the specified memory. | |
33 If the format is not supported, return NULL. If a movie is returned, | |
34 the data will have been read or copied, and so the caller may free | |
35 it. | |
36 */ | |
37 static SkMovie* DecodeMemory(const void* data, size_t length); | |
38 | |
39 SkMSec duration(); | |
40 int width(); | |
41 int height(); | |
42 int isOpaque(); | |
43 | |
44 /** Specify the time code (between 0...duration) to sample a bitmap | |
45 from the movie. Returns true if this time code generated a different | |
46 bitmap/frame from the previous state (i.e. true means you need to | |
47 redraw). | |
48 */ | |
49 bool setTime(SkMSec); | |
50 | |
51 // return the right bitmap for the current time code | |
52 const SkBitmap& bitmap(); | |
53 | |
54 protected: | |
55 struct Info { | |
56 SkMSec fDuration; | |
57 int fWidth; | |
58 int fHeight; | |
59 bool fIsOpaque; | |
60 }; | |
61 | |
62 virtual bool onGetInfo(Info*) = 0; | |
63 virtual bool onSetTime(SkMSec) = 0; | |
64 virtual bool onGetBitmap(SkBitmap*) = 0; | |
65 | |
66 // visible for subclasses | |
67 SkMovie(); | |
68 | |
69 private: | |
70 Info fInfo; | |
71 SkMSec fCurrTime; | |
72 SkBitmap fBitmap; | |
73 bool fNeedBitmap; | |
74 | |
75 void ensureInfo(); | |
76 | |
77 typedef SkRefCnt INHERITED; | |
78 }; | |
79 | |
80 #endif | |
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