/
GradientFillContent.java
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/
GradientFillContent.java
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package com.airbnb.lottie.animation.content;
import static com.airbnb.lottie.utils.MiscUtils.clamp;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PointF;
import android.graphics.RadialGradient;
import android.graphics.RectF;
import android.graphics.Shader;
import androidx.annotation.NonNull;
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.LPaint;
import com.airbnb.lottie.animation.keyframe.BaseKeyframeAnimation;
import com.airbnb.lottie.animation.keyframe.DropShadowKeyframeAnimation;
import com.airbnb.lottie.animation.keyframe.ValueCallbackKeyframeAnimation;
import com.airbnb.lottie.model.KeyPath;
import com.airbnb.lottie.model.content.GradientColor;
import com.airbnb.lottie.model.content.GradientFill;
import com.airbnb.lottie.model.content.GradientType;
import com.airbnb.lottie.model.layer.BaseLayer;
import com.airbnb.lottie.utils.MiscUtils;
import com.airbnb.lottie.value.LottieValueCallback;
import java.util.ArrayList;
import java.util.List;
public class GradientFillContent
implements DrawingContent, BaseKeyframeAnimation.AnimationListener, KeyPathElementContent {
/**
* Cache the gradients such that it runs at 30fps.
*/
private static final int CACHE_STEPS_MS = 32;
@NonNull private final String name;
private final boolean hidden;
private final BaseLayer layer;
private final LongSparseArray<LinearGradient> linearGradientCache = new LongSparseArray<>();
private final LongSparseArray<RadialGradient> radialGradientCache = new LongSparseArray<>();
private final Path path = new Path();
private final Paint paint = new LPaint(Paint.ANTI_ALIAS_FLAG);
private final RectF boundsRect = new RectF();
private final List<PathContent> paths = new ArrayList<>();
private final GradientType type;
private final BaseKeyframeAnimation<GradientColor, GradientColor> colorAnimation;
private final BaseKeyframeAnimation<Integer, Integer> opacityAnimation;
private final BaseKeyframeAnimation<PointF, PointF> startPointAnimation;
private final BaseKeyframeAnimation<PointF, PointF> endPointAnimation;
@Nullable private BaseKeyframeAnimation<ColorFilter, ColorFilter> colorFilterAnimation;
@Nullable private ValueCallbackKeyframeAnimation colorCallbackAnimation;
private final LottieDrawable lottieDrawable;
private final int cacheSteps;
@Nullable private BaseKeyframeAnimation<Float, Float> blurAnimation;
float blurMaskFilterRadius = 0f;
@Nullable private DropShadowKeyframeAnimation dropShadowAnimation;
public GradientFillContent(final LottieDrawable lottieDrawable, LottieComposition composition, BaseLayer layer, GradientFill fill) {
this.layer = layer;
name = fill.getName();
hidden = fill.isHidden();
this.lottieDrawable = lottieDrawable;
type = fill.getGradientType();
path.setFillType(fill.getFillType());
cacheSteps = (int) (composition.getDuration() / CACHE_STEPS_MS);
colorAnimation = fill.getGradientColor().createAnimation();
colorAnimation.addUpdateListener(this);
layer.addAnimation(colorAnimation);
opacityAnimation = fill.getOpacity().createAnimation();
opacityAnimation.addUpdateListener(this);
layer.addAnimation(opacityAnimation);
startPointAnimation = fill.getStartPoint().createAnimation();
startPointAnimation.addUpdateListener(this);
layer.addAnimation(startPointAnimation);
endPointAnimation = fill.getEndPoint().createAnimation();
endPointAnimation.addUpdateListener(this);
layer.addAnimation(endPointAnimation);
if (layer.getBlurEffect() != null) {
blurAnimation = layer.getBlurEffect().getBlurriness().createAnimation();
blurAnimation.addUpdateListener(this);
layer.addAnimation(blurAnimation);
}
if (layer.getDropShadowEffect() != null) {
dropShadowAnimation = new DropShadowKeyframeAnimation(this, layer, layer.getDropShadowEffect());
}
}
@Override public void onValueChanged() {
lottieDrawable.invalidateSelf();
}
@Override public void setContents(List<Content> contentsBefore, List<Content> contentsAfter) {
for (int i = 0; i < contentsAfter.size(); i++) {
Content content = contentsAfter.get(i);
if (content instanceof PathContent) {
paths.add((PathContent) content);
}
}
}
@Override public void draw(Canvas canvas, Matrix parentMatrix, int parentAlpha) {
if (hidden) {
return;
}
if (L.isTraceEnabled()) {
L.beginSection("GradientFillContent#draw");
}
path.reset();
for (int i = 0; i < paths.size(); i++) {
path.addPath(paths.get(i).getPath(), parentMatrix);
}
path.computeBounds(boundsRect, false);
Shader shader;
if (type == GradientType.LINEAR) {
shader = getLinearGradient();
} else {
shader = getRadialGradient();
}
shader.setLocalMatrix(parentMatrix);
paint.setShader(shader);
if (colorFilterAnimation != null) {
paint.setColorFilter(colorFilterAnimation.getValue());
}
if (blurAnimation != null) {
float blurRadius = blurAnimation.getValue();
if (blurRadius == 0f) {
paint.setMaskFilter(null);
} else if (blurRadius != blurMaskFilterRadius){
BlurMaskFilter blur = new BlurMaskFilter(blurRadius, BlurMaskFilter.Blur.NORMAL);
paint.setMaskFilter(blur);
}
blurMaskFilterRadius = blurRadius;
}
if (dropShadowAnimation != null) {
dropShadowAnimation.applyTo(paint);
}
int alpha = (int) ((parentAlpha / 255f * opacityAnimation.getValue() / 100f) * 255);
paint.setAlpha(clamp(alpha, 0, 255));
canvas.drawPath(path, paint);
if (L.isTraceEnabled()) {
L.endSection("GradientFillContent#draw");
}
}
@Override public void getBounds(RectF outBounds, Matrix parentMatrix, boolean applyParents) {
path.reset();
for (int i = 0; i < paths.size(); i++) {
path.addPath(paths.get(i).getPath(), parentMatrix);
}
path.computeBounds(outBounds, false);
// Add padding to account for rounding errors.
outBounds.set(
outBounds.left - 1,
outBounds.top - 1,
outBounds.right + 1,
outBounds.bottom + 1
);
}
@Override public String getName() {
return name;
}
private LinearGradient getLinearGradient() {
int gradientHash = getGradientHash();
LinearGradient gradient = linearGradientCache.get(gradientHash);
if (gradient != null) {
return gradient;
}
PointF startPoint = startPointAnimation.getValue();
PointF endPoint = endPointAnimation.getValue();
GradientColor gradientColor = colorAnimation.getValue();
int[] colors = applyDynamicColorsIfNeeded(gradientColor.getColors());
float[] positions = gradientColor.getPositions();
gradient = new LinearGradient(startPoint.x, startPoint.y, endPoint.x, endPoint.y, colors,
positions, Shader.TileMode.CLAMP);
linearGradientCache.put(gradientHash, gradient);
return gradient;
}
private RadialGradient getRadialGradient() {
int gradientHash = getGradientHash();
RadialGradient gradient = radialGradientCache.get(gradientHash);
if (gradient != null) {
return gradient;
}
PointF startPoint = startPointAnimation.getValue();
PointF endPoint = endPointAnimation.getValue();
GradientColor gradientColor = colorAnimation.getValue();
int[] colors = applyDynamicColorsIfNeeded(gradientColor.getColors());
float[] positions = gradientColor.getPositions();
float x0 = startPoint.x;
float y0 = startPoint.y;
float x1 = endPoint.x;
float y1 = endPoint.y;
float r = (float) Math.hypot(x1 - x0, y1 - y0);
if (r <= 0) {
r = 0.001f;
}
gradient = new RadialGradient(x0, y0, r, colors, positions, Shader.TileMode.CLAMP);
radialGradientCache.put(gradientHash, gradient);
return gradient;
}
private int getGradientHash() {
int startPointProgress = Math.round(startPointAnimation.getProgress() * cacheSteps);
int endPointProgress = Math.round(endPointAnimation.getProgress() * cacheSteps);
int colorProgress = Math.round(colorAnimation.getProgress() * cacheSteps);
int hash = 17;
if (startPointProgress != 0) {
hash = hash * 31 * startPointProgress;
}
if (endPointProgress != 0) {
hash = hash * 31 * endPointProgress;
}
if (colorProgress != 0) {
hash = hash * 31 * colorProgress;
}
return hash;
}
private int[] applyDynamicColorsIfNeeded(int[] colors) {
if (colorCallbackAnimation != null) {
Integer[] dynamicColors = (Integer[]) colorCallbackAnimation.getValue();
if (colors.length == dynamicColors.length) {
for (int i = 0; i < colors.length; i++) {
colors[i] = dynamicColors[i];
}
} else {
colors = new int[dynamicColors.length];
for (int i = 0; i < dynamicColors.length; i++) {
colors[i] = dynamicColors[i];
}
}
}
return colors;
}
@Override public void resolveKeyPath(
KeyPath keyPath, int depth, List<KeyPath> accumulator, KeyPath currentPartialKeyPath) {
MiscUtils.resolveKeyPath(keyPath, depth, accumulator, currentPartialKeyPath, this);
}
@SuppressWarnings("unchecked")
@Override
public <T> void addValueCallback(T property, @Nullable LottieValueCallback<T> callback) {
if (property == LottieProperty.OPACITY) {
opacityAnimation.setValueCallback((LottieValueCallback<Integer>) callback);
} else if (property == LottieProperty.COLOR_FILTER) {
if (colorFilterAnimation != null) {
layer.removeAnimation(colorFilterAnimation);
}
if (callback == null) {
colorFilterAnimation = null;
} else {
colorFilterAnimation =
new ValueCallbackKeyframeAnimation<>((LottieValueCallback<ColorFilter>) callback);
colorFilterAnimation.addUpdateListener(this);
layer.addAnimation(colorFilterAnimation);
}
} else if (property == LottieProperty.GRADIENT_COLOR) {
if (colorCallbackAnimation != null) {
layer.removeAnimation(colorCallbackAnimation);
}
if (callback == null) {
colorCallbackAnimation = null;
} else {
linearGradientCache.clear();
radialGradientCache.clear();
colorCallbackAnimation = new ValueCallbackKeyframeAnimation<>(callback);
colorCallbackAnimation.addUpdateListener(this);
layer.addAnimation(colorCallbackAnimation);
}
} else if (property == LottieProperty.BLUR_RADIUS) {
if (blurAnimation != null) {
blurAnimation.setValueCallback((LottieValueCallback<Float>) callback);
} else {
blurAnimation =
new ValueCallbackKeyframeAnimation<>((LottieValueCallback<Float>) callback);
blurAnimation.addUpdateListener(this);
layer.addAnimation(blurAnimation);
}
} else if (property == LottieProperty.DROP_SHADOW_COLOR && dropShadowAnimation != null) {
dropShadowAnimation.setColorCallback((LottieValueCallback<Integer>) callback);
} else if (property == LottieProperty.DROP_SHADOW_OPACITY && dropShadowAnimation != null) {
dropShadowAnimation.setOpacityCallback((LottieValueCallback<Float>) callback);
} else if (property == LottieProperty.DROP_SHADOW_DIRECTION && dropShadowAnimation != null) {
dropShadowAnimation.setDirectionCallback((LottieValueCallback<Float>) callback);
} else if (property == LottieProperty.DROP_SHADOW_DISTANCE && dropShadowAnimation != null) {
dropShadowAnimation.setDistanceCallback((LottieValueCallback<Float>) callback);
} else if (property == LottieProperty.DROP_SHADOW_RADIUS && dropShadowAnimation != null) {
dropShadowAnimation.setRadiusCallback((LottieValueCallback<Float>) callback);
}
}
}