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