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package com.bumptech.glide.load.resource.gif;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.drawable.Animatable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import com.bumptech.glide.gifdecoder.GifDecoder;
import com.bumptech.glide.gifdecoder.GifHeader;
import com.bumptech.glide.load.Transformation;
/**
* An animated {@link android.graphics.drawable.Drawable} that plays the frames of an animated GIF.
*/
public class GifDrawable extends Drawable implements Animatable, GifFrameManager.FrameCallback {
private final Paint paint = new Paint();
private GifFrameManager frameManager;
private GifState state;
private int width = -1;
private int height = -1;
private GifDecoder decoder;
private boolean isRunning;
private Bitmap currentFrame;
private boolean isRecycled;
public GifDrawable(String id, GifHeader gifHeader, byte[] data, Context context,
Transformation<Bitmap> frameTransformation, int targetWidth, int targetHeight,
GifDecoder.BitmapProvider bitmapProvider) {
this(new GifState(id, gifHeader, data, context, frameTransformation, targetWidth, targetHeight,
bitmapProvider));
}
private GifDrawable(GifState state) {
this.state = state;
this.decoder = new GifDecoder(state.bitmapProvider);
decoder.setData(state.id, state.gifHeader, state.data);
frameManager = new GifFrameManager(state.context, decoder, state.frameTransformation, state.targetWidth,
state.targetHeight);
}
// For testing.
GifDrawable(GifDecoder decoder, GifFrameManager frameManager) {
this.decoder = decoder;
this.frameManager = frameManager;
this.state = new GifState(null);
}
@Override
public void start() {
if (!isRunning) {
isRunning = true;
frameManager.getNextFrame(this);
invalidateSelf();
}
}
@Override
public boolean setVisible(boolean visible, boolean restart) {
if (!visible) {
stop();
} else {
start();
}
return super.setVisible(visible, restart);
}
@Override
public int getIntrinsicWidth() {
return width;
}
@Override
public int getIntrinsicHeight() {
return height;
}
@Override
public void stop() {
isRunning = false;
}
@Override
public boolean isRunning() {
return isRunning;
}
// For testing.
void setIsRunning(boolean isRunning) {
this.isRunning = isRunning;
}
@Override
public void draw(Canvas canvas) {
if (currentFrame != null) {
canvas.drawBitmap(currentFrame, 0, 0, paint);
}
}
@Override
public void setAlpha(int i) {
paint.setAlpha(i);
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
paint.setColorFilter(colorFilter);
}
@Override
public int getOpacity() {
return decoder.isTransparent() ? PixelFormat.TRANSPARENT : PixelFormat.OPAQUE;
}
@TargetApi(11)
@Override
public void onFrameRead(Bitmap frame) {
if (Build.VERSION.SDK_INT >= 11 && getCallback() == null) {
stop();
return;
} if (!isRunning) {
return;
}
if (width == -1) {
width = frame.getWidth();
}
if (height == -1) {
height = frame.getHeight();
}
if (frame != null) {
currentFrame = frame;
invalidateSelf();
}
frameManager.getNextFrame(this);
}
@Override
public ConstantState getConstantState() {
return state;
}
/**
* Clears any resources for loading frames that are currently held on to by this object.
*/
public void recycle() {
isRecycled = true;
frameManager.clear();
}
boolean isRecycled() {
return isRecycled;
}
static class GifState extends ConstantState {
String id;
GifHeader gifHeader;
byte[] data;
Context context;
Transformation<Bitmap> frameTransformation;
int targetWidth;
int targetHeight;
GifDecoder.BitmapProvider bitmapProvider;
public GifState(String id, GifHeader header, byte[] data, Context context,
Transformation<Bitmap> frameTransformation, int targetWidth, int targetHeight,
GifDecoder.BitmapProvider provider) {
this.id = id;
gifHeader = header;
this.data = data;
this.context = context.getApplicationContext();
this.frameTransformation = frameTransformation;
this.targetWidth = targetWidth;
this.targetHeight = targetHeight;
bitmapProvider = provider;
}
public GifState(GifState original) {
if (original != null) {
id = original.id;
gifHeader = original.gifHeader;
data = original.data;
context = original.context;
frameTransformation = original.frameTransformation;
targetWidth = original.targetWidth;
targetHeight = original.targetHeight;
bitmapProvider = original.bitmapProvider;
}
}
@Override
public Drawable newDrawable(Resources res) {
return super.newDrawable(res);
}
@Override
public Drawable newDrawable() {
return new GifDrawable(this);
}
@Override
public int getChangingConfigurations() {
return 0;
}
}
}
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