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 SK_DECLARE_INST_COUNT(SkMovie) 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 81
