Tony Wickham
8dd2409923
In battery saver mode, animations skip directly to the final values. For LogDecelerateInterpolator, however, an input of 1f outputs an interpolated 0.99999994. This meant that the FirstFrameAnimatorHelper didn't realize that this was the last frame, and messed things up. Since any interpolator should return 1 on an input of 1, we just short-circuit in that case for the log interpolators. Bug: 25666809 Change-Id: I60527e3758cea383fbcf50acb95460a7bd9ab43c
28 lines
845 B
Java
28 lines
845 B
Java
package com.android.launcher3;
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import android.animation.TimeInterpolator;
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public class LogAccelerateInterpolator implements TimeInterpolator {
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int mBase;
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int mDrift;
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final float mLogScale;
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public LogAccelerateInterpolator(int base, int drift) {
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mBase = base;
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mDrift = drift;
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mLogScale = 1f / computeLog(1, mBase, mDrift);
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}
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static float computeLog(float t, int base, int drift) {
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return (float) -Math.pow(base, -t) + 1 + (drift * t);
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}
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@Override
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public float getInterpolation(float t) {
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// Due to rounding issues, the interpolation doesn't quite reach 1 even though it should.
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// To account for this, we short-circuit to return 1 if the input is 1.
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return Float.compare(t, 1f) == 0 ? 1f : 1 - computeLog(1 - t, mBase, mDrift) * mLogScale;
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}
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}
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