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CompositionLayer.java
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CompositionLayer.java
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package com.airbnb.lottie.model.layer;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.RectF;
import androidx.annotation.FloatRange;
import androidx.annotation.Nullable;
import androidx.collection.LongSparseArray;
import com.airbnb.lottie.L;
import com.airbnb.lottie.LottieComposition;
import com.airbnb.lottie.LottieDrawable;
import com.airbnb.lottie.LottieProperty;
import com.airbnb.lottie.animation.keyframe.BaseKeyframeAnimation;
import com.airbnb.lottie.animation.keyframe.ValueCallbackKeyframeAnimation;
import com.airbnb.lottie.model.KeyPath;
import com.airbnb.lottie.model.animatable.AnimatableFloatValue;
import com.airbnb.lottie.utils.Utils;
import com.airbnb.lottie.value.LottieValueCallback;
import java.util.ArrayList;
import java.util.List;
public class CompositionLayer extends BaseLayer {
@Nullable private BaseKeyframeAnimation<Float, Float> timeRemapping;
private final List<BaseLayer> layers = new ArrayList<>();
private final RectF rect = new RectF();
private final RectF newClipRect = new RectF();
private final Paint layerPaint = new Paint();
@Nullable private Boolean hasMatte;
@Nullable private Boolean hasMasks;
public CompositionLayer(LottieDrawable lottieDrawable, Layer layerModel, List<Layer> layerModels,
LottieComposition composition) {
super(lottieDrawable, layerModel);
AnimatableFloatValue timeRemapping = layerModel.getTimeRemapping();
if (timeRemapping != null) {
this.timeRemapping = timeRemapping.createAnimation();
addAnimation(this.timeRemapping);
//noinspection ConstantConditions
this.timeRemapping.addUpdateListener(this);
} else {
this.timeRemapping = null;
}
LongSparseArray<BaseLayer> layerMap =
new LongSparseArray<>(composition.getLayers().size());
BaseLayer mattedLayer = null;
for (int i = layerModels.size() - 1; i >= 0; i--) {
Layer lm = layerModels.get(i);
BaseLayer layer = BaseLayer.forModel(this, lm, lottieDrawable, composition);
if (layer == null) {
continue;
}
layerMap.put(layer.getLayerModel().getId(), layer);
if (mattedLayer != null) {
mattedLayer.setMatteLayer(layer);
mattedLayer = null;
} else {
layers.add(0, layer);
switch (lm.getMatteType()) {
case ADD:
case INVERT:
mattedLayer = layer;
break;
}
}
}
for (int i = 0; i < layerMap.size(); i++) {
long key = layerMap.keyAt(i);
BaseLayer layerView = layerMap.get(key);
// This shouldn't happen but it appears as if sometimes on pre-lollipop devices when
// compiled with d8, layerView is null sometimes.
// https://github.com/airbnb/lottie-android/issues/524
if (layerView == null) {
continue;
}
BaseLayer parentLayer = layerMap.get(layerView.getLayerModel().getParentId());
if (parentLayer != null) {
layerView.setParentLayer(parentLayer);
}
}
}
@Override public void setOutlineMasksAndMattes(boolean outline) {
super.setOutlineMasksAndMattes(outline);
for (BaseLayer layer : layers) {
layer.setOutlineMasksAndMattes(outline);
}
}
@Override void drawLayer(Canvas canvas, Matrix parentMatrix, int parentAlpha) {
L.beginSection("CompositionLayer#draw");
newClipRect.set(0, 0, layerModel.getPreCompWidth(), layerModel.getPreCompHeight());
parentMatrix.mapRect(newClipRect);
// Apply off-screen rendering only when needed in order to improve rendering performance.
boolean isDrawingWithOffScreen = lottieDrawable.isApplyingOpacityToLayersEnabled() && layers.size() > 1 && parentAlpha != 255;
if (isDrawingWithOffScreen) {
layerPaint.setAlpha(parentAlpha);
Utils.saveLayerCompat(canvas, newClipRect, layerPaint);
} else {
canvas.save();
}
int childAlpha = isDrawingWithOffScreen ? 255 : parentAlpha;
for (int i = layers.size() - 1; i >= 0; i--) {
boolean nonEmptyClip = true;
if (lottieDrawable.getClipToCompositionBounds() && !newClipRect.isEmpty()) {
nonEmptyClip = canvas.clipRect(newClipRect);
}
if (nonEmptyClip) {
BaseLayer layer = layers.get(i);
layer.draw(canvas, parentMatrix, childAlpha);
}
}
canvas.restore();
L.endSection("CompositionLayer#draw");
}
@Override public void getBounds(RectF outBounds, Matrix parentMatrix, boolean applyParents) {
super.getBounds(outBounds, parentMatrix, applyParents);
for (int i = layers.size() - 1; i >= 0; i--) {
rect.set(0, 0, 0, 0);
layers.get(i).getBounds(rect, boundsMatrix, true);
outBounds.union(rect);
}
}
@Override public void setProgress(@FloatRange(from = 0f, to = 1f) float progress) {
super.setProgress(progress);
if (timeRemapping != null) {
// The duration has 0.01 frame offset to show end of animation properly.
// https://github.com/airbnb/lottie-android/pull/766
// Ignore this offset for calculating time-remapping because time-remapping value is based on original duration.
float durationFrames = lottieDrawable.getComposition().getDurationFrames() + 0.01f;
float compositionDelayFrames = layerModel.getComposition().getStartFrame();
float remappedFrames = timeRemapping.getValue() * layerModel.getComposition().getFrameRate() - compositionDelayFrames;
progress = remappedFrames / durationFrames;
}
if (timeRemapping == null) {
progress -= layerModel.getStartProgress();
}
//Time stretch needs to be divided if is not "__container"
if (layerModel.getTimeStretch() != 0 && !"__container".equals(layerModel.getName())) {
progress /= layerModel.getTimeStretch();
}
for (int i = layers.size() - 1; i >= 0; i--) {
layers.get(i).setProgress(progress);
}
}
public boolean hasMasks() {
if (hasMasks == null) {
for (int i = layers.size() - 1; i >= 0; i--) {
BaseLayer layer = layers.get(i);
if (layer instanceof ShapeLayer) {
if (layer.hasMasksOnThisLayer()) {
hasMasks = true;
return true;
}
} else if (layer instanceof CompositionLayer && ((CompositionLayer) layer).hasMasks()) {
hasMasks = true;
return true;
}
}
hasMasks = false;
}
return hasMasks;
}
public boolean hasMatte() {
if (hasMatte == null) {
if (hasMatteOnThisLayer()) {
hasMatte = true;
return true;
}
for (int i = layers.size() - 1; i >= 0; i--) {
if (layers.get(i).hasMatteOnThisLayer()) {
hasMatte = true;
return true;
}
}
hasMatte = false;
}
return hasMatte;
}
@Override
protected void resolveChildKeyPath(KeyPath keyPath, int depth, List<KeyPath> accumulator,
KeyPath currentPartialKeyPath) {
for (int i = 0; i < layers.size(); i++) {
layers.get(i).resolveKeyPath(keyPath, depth, accumulator, currentPartialKeyPath);
}
}
@SuppressWarnings("unchecked")
@Override
public <T> void addValueCallback(T property, @Nullable LottieValueCallback<T> callback) {
super.addValueCallback(property, callback);
if (property == LottieProperty.TIME_REMAP) {
if (callback == null) {
if (timeRemapping != null) {
timeRemapping.setValueCallback(null);
}
} else {
timeRemapping = new ValueCallbackKeyframeAnimation<>((LottieValueCallback<Float>) callback);
timeRemapping.addUpdateListener(this);
addAnimation(timeRemapping);
}
}
}
}