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Commit a5dcc6c2 authored by Teng-Hui Zhu's avatar Teng-Hui Zhu
Browse files

LUTInterpolator needs to have 2 frame at minimal 

Otherwise, it could be having invalid data, here NAN.
Fix:27343522

Change-Id: I5bb17f04c62f268ec633675015ef589be2413338
parent af64f634

core/java/com/android/internal/view/animation/FallbackLUTInterpolator.java

+2 −1
Original line number Diff line number Diff line
@@ -45,7 +45,8 @@ public class FallbackLUTInterpolator implements NativeInterpolatorFactory, TimeI 
    private static float[] createLUT(TimeInterpolator interpolator, long duration) {

        long frameIntervalNanos = Choreographer.getInstance().getFrameIntervalNanos();

        int animIntervalMs = (int) (frameIntervalNanos / TimeUtils.NANOS_PER_MS);

        int numAnimFrames = (int) Math.ceil(((double) duration) / animIntervalMs);

        // We need 2 frame values as the minimal.

        int numAnimFrames = Math.max(2, (int) Math.ceil(((double) duration) / animIntervalMs));

        float values[] = new float[numAnimFrames];

        float lastFrame = numAnimFrames - 1;

        for (int i = 0; i < numAnimFrames; i++) {