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 SkStream; 17 18 class SkMovie : public SkRefCnt { 19 public: 20 /** Try to create a movie from the stream. If the stream format is not 21 supported, return NULL. 22 */ 23 static SkMovie* DecodeStream(SkStream*); 24 /** Try to create a movie from the specified file path. If the file is not 25 found, or the format is not supported, return NULL. If a movie is 26 returned, the stream may be retained by the movie (via ref()) until 27 the movie is finished with it (by calling unref()). 28 */ 29 static SkMovie* DecodeFile(const char path[]); 30 /** Try to create a movie from the specified memory. 31 If the format is not supported, return NULL. If a movie is returned, 32 the data will have been read or copied, and so the caller may free 33 it. 34 */ 35 static SkMovie* DecodeMemory(const void* data, size_t length); 36 37 SkMSec duration(); 38 int width(); 39 int height(); 40 int isOpaque(); 41 42 /** Specify the time code (between 0...duration) to sample a bitmap 43 from the movie. Returns true if this time code generated a different 44 bitmap/frame from the previous state (i.e. true means you need to 45 redraw). 46 */ 47 bool setTime(SkMSec); 48 49 // return the right bitmap for the current time code 50 const SkBitmap& bitmap(); 51 52 protected: 53 struct Info { 54 SkMSec fDuration; 55 int fWidth; 56 int fHeight; 57 bool fIsOpaque; 58 }; 59 60 virtual bool onGetInfo(Info*) = 0; 61 virtual bool onSetTime(SkMSec) = 0; 62 virtual bool onGetBitmap(SkBitmap*) = 0; 63 64 // visible for subclasses 65 SkMovie(); 66 67 private: 68 Info fInfo; 69 SkMSec fCurrTime; 70 SkBitmap fBitmap; 71 bool fNeedBitmap; 72 73 void ensureInfo(); 74 }; 75 76 #endif 77