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Added support for drop shadows (airbnb#1860)
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100 changes: 100 additions & 0 deletions
100
lottie/src/main/java/com/airbnb/lottie/animation/keyframe/DropShadowKeyframeAnimation.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| package com.airbnb.lottie.animation.keyframe; | ||
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| import android.graphics.Color; | ||
| import android.graphics.Paint; | ||
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| import androidx.annotation.Nullable; | ||
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| import com.airbnb.lottie.model.layer.BaseLayer; | ||
| import com.airbnb.lottie.parser.DropShadowEffect; | ||
| import com.airbnb.lottie.value.LottieFrameInfo; | ||
| import com.airbnb.lottie.value.LottieValueCallback; | ||
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| public class DropShadowKeyframeAnimation implements BaseKeyframeAnimation.AnimationListener { | ||
| private static final double DEG_TO_RAD = Math.PI / 180.0; | ||
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| private final BaseKeyframeAnimation.AnimationListener listener; | ||
| private final BaseKeyframeAnimation<Integer, Integer> color; | ||
| private final BaseKeyframeAnimation<Float, Float> opacity; | ||
| private final BaseKeyframeAnimation<Float, Float> direction; | ||
| private final BaseKeyframeAnimation<Float, Float> distance; | ||
| private final BaseKeyframeAnimation<Float, Float> radius; | ||
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| private boolean isDirty = true; | ||
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| public DropShadowKeyframeAnimation(BaseKeyframeAnimation.AnimationListener listener, BaseLayer layer, DropShadowEffect dropShadowEffect) { | ||
| this.listener = listener; | ||
| color = dropShadowEffect.getColor().createAnimation(); | ||
| color.addUpdateListener(this); | ||
| layer.addAnimation(color); | ||
| opacity = dropShadowEffect.getOpacity().createAnimation(); | ||
| opacity.addUpdateListener(this); | ||
| layer.addAnimation(opacity); | ||
| direction = dropShadowEffect.getDirection().createAnimation(); | ||
| direction.addUpdateListener(this); | ||
| layer.addAnimation(direction); | ||
| distance = dropShadowEffect.getDistance().createAnimation(); | ||
| distance.addUpdateListener(this); | ||
| layer.addAnimation(distance); | ||
| radius = dropShadowEffect.getRadius().createAnimation(); | ||
| radius.addUpdateListener(this); | ||
| layer.addAnimation(radius); | ||
| } | ||
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| @Override public void onValueChanged() { | ||
| isDirty = true; | ||
| listener.onValueChanged(); | ||
| } | ||
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| public void applyTo(Paint paint) { | ||
| if (!isDirty) { | ||
| return; | ||
| } | ||
| isDirty = false; | ||
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| double directionRad = ((double) direction.getValue()) * DEG_TO_RAD; | ||
| float distance = this.distance.getValue(); | ||
| float x = ((float) Math.sin(directionRad)) * distance; | ||
| float y = ((float) Math.cos(directionRad + Math.PI)) * distance; | ||
| int baseColor = color.getValue(); | ||
| int opacity = Math.round(this.opacity.getValue()); | ||
| int color = Color.argb(opacity, Color.red(baseColor), Color.green(baseColor), Color.blue(baseColor)); | ||
| float radius = this.radius.getValue(); | ||
| paint.setShadowLayer(radius, x, y, color); | ||
| } | ||
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| public void setColorCallback(@Nullable LottieValueCallback<Integer> callback) { | ||
| color.setValueCallback(callback); | ||
| } | ||
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| public void setOpacityCallback(@Nullable final LottieValueCallback<Float> callback) { | ||
| if (callback == null) { | ||
| opacity.setValueCallback(null); | ||
| return; | ||
| } | ||
| opacity.setValueCallback(new LottieValueCallback<Float>() { | ||
| @Nullable | ||
| @Override | ||
| public Float getValue(LottieFrameInfo<Float> frameInfo) { | ||
| Float value = callback.getValue(frameInfo); | ||
| if (value == null) { | ||
| return null; | ||
| } | ||
| // Convert [0,100] to [0,255] because other dynamic properties use [0,100]. | ||
| return value * 2.55f; | ||
| } | ||
| }); | ||
| } | ||
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| public void setDirectionCallback(@Nullable LottieValueCallback<Float> callback) { | ||
| direction.setValueCallback(callback); | ||
| } | ||
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| public void setDistanceCallback(@Nullable LottieValueCallback<Float> callback) { | ||
| distance.setValueCallback(callback); | ||
| } | ||
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| public void setRadiusCallback(@Nullable LottieValueCallback<Float> callback) { | ||
| radius.setValueCallback(callback); | ||
| } | ||
| } |
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