| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef RASTERMILL_FRAMESQUENCE_GIF_H |
| #define RASTERMILL_FRAMESQUENCE_GIF_H |
| |
| #include "config.h" |
| #include "gif_lib.h" |
| |
| #include "Stream.h" |
| #include "Color.h" |
| #include "FrameSequence.h" |
| |
| class FrameSequence_gif : public FrameSequence { |
| public: |
| FrameSequence_gif(Stream* stream); |
| virtual ~FrameSequence_gif(); |
| |
| virtual int getWidth() const { |
| return mGif ? mGif->SWidth : 0; |
| } |
| |
| virtual int getHeight() const { |
| return mGif ? mGif->SHeight : 0; |
| } |
| |
| virtual bool isOpaque() const { |
| return (mBgColor & COLOR_8888_ALPHA_MASK) == COLOR_8888_ALPHA_MASK; |
| } |
| |
| virtual int getFrameCount() const { |
| return mGif ? mGif->ImageCount : 0; |
| } |
| |
| virtual int getDefaultLoopCount() const { |
| return mLoopCount; |
| } |
| |
| virtual FrameSequenceState* createState() const; |
| |
| GifFileType* getGif() const { return mGif; } |
| Color8888 getBackgroundColor() const { return mBgColor; } |
| bool getPreservedFrame(int frameIndex) const { return mPreservedFrames[frameIndex]; } |
| int getRestoringFrame(int frameIndex) const { return mRestoringFrames[frameIndex]; } |
| |
| private: |
| GifFileType* mGif; |
| int mLoopCount; |
| Color8888 mBgColor; |
| |
| // array of bool per frame - if true, frame data is used by a later DISPOSE_PREVIOUS frame |
| bool* mPreservedFrames; |
| |
| // array of ints per frame - if >= 0, points to the index of the preserve that frame needs |
| int* mRestoringFrames; |
| }; |
| |
| class FrameSequenceState_gif : public FrameSequenceState { |
| public: |
| FrameSequenceState_gif(const FrameSequence_gif& frameSequence); |
| virtual ~FrameSequenceState_gif(); |
| |
| // returns frame's delay time in ms |
| virtual long drawFrame(int frameNr, |
| Color8888* outputPtr, int outputPixelStride, int previousFrameNr); |
| |
| private: |
| void savePreserveBuffer(Color8888* outputPtr, int outputPixelStride, int frameNr); |
| void restorePreserveBuffer(Color8888* outputPtr, int outputPixelStride); |
| |
| const FrameSequence_gif& mFrameSequence; |
| Color8888* mPreserveBuffer; |
| int mPreserveBufferFrame; |
| }; |
| |
| #endif //RASTERMILL_FRAMESQUENCE_GIF_H |