1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef RASTERMILL_FRAME_SEQUENCE_H 18 #define RASTERMILL_FRAME_SEQUENCE_H 19 20 #include "Stream.h" 21 #include "Color.h" 22 23 class FrameSequenceState { 24 public: 25 /** 26 * Produces a frame of animation in the output buffer, drawing (at minimum) the delta since 27 * previousFrameNr (the current contents of the buffer), or from scratch if previousFrameNr is 28 * negative 29 * 30 * Returns frame's delay time in milliseconds. 31 */ 32 virtual long drawFrame(int frameNr, 33 Color8888* outputPtr, int outputPixelStride, int previousFrameNr) = 0; ~FrameSequenceState()34 virtual ~FrameSequenceState() {} 35 }; 36 37 class FrameSequence { 38 public: 39 /** 40 * Creates a FrameSequence using data from the data stream 41 * 42 * Type determined by header information in the stream 43 */ 44 static FrameSequence* create(Stream* stream); 45 ~FrameSequence()46 virtual ~FrameSequence() {} 47 virtual int getWidth() const = 0; 48 virtual int getHeight() const = 0; 49 virtual bool isOpaque() const = 0; 50 virtual int getFrameCount() const = 0; 51 virtual int getDefaultLoopCount() const = 0; 52 virtual jobject getRawByteBuffer() const = 0; 53 54 virtual FrameSequenceState* createState() const = 0; 55 }; 56 57 #endif //RASTERMILL_FRAME_SEQUENCE_H 58