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Commit 78a29672 authored by Steve Kondik's avatar Steve Kondik
Browse files

Add CPU boosting hooks 

 * Send boost hint during scrolling
 * Still relevant on even high-end hardware

Change-Id: I72f2c2851b01fbceabddead03a4c3a7a0526ca61
parent dbd3649b

core/java/android/widget/OverScroller.java

+5 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ package android.widget; 


import android.content.Context;

import android.hardware.SensorManager;

import android.os.PowerManager;

import android.util.FloatMath;

import android.util.Log;

import android.view.ViewConfiguration;
@@ -601,6 +602,8 @@ public class OverScroller { 
        private static final int CUBIC = 1;

        private static final int BALLISTIC = 2;



        private final PowerManager mPm;



        static {

            float x_min = 0.0f;

            float y_min = 0.0f;
@@ -645,6 +648,7 @@ public class OverScroller { 
                    * 39.37f // inch/meter

                    * ppi

                    * 0.84f; // look and feel tuning

            mPm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);

        }



        void updateScroll(float q) {
@@ -762,6 +766,7 @@ public class OverScroller { 
            if (velocity != 0) {

                mDuration = mSplineDuration = getSplineFlingDuration(velocity);

                totalDistance = getSplineFlingDistance(velocity);

                mPm.cpuBoost(mDuration * 1000);

            }



            mSplineDistance = (int) (totalDistance * Math.signum(velocity));

core/java/android/widget/Scroller.java

+7 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ package android.widget; 
import android.content.Context;

import android.hardware.SensorManager;

import android.os.Build;

import android.os.PowerManager;

import android.util.FloatMath;

import android.view.ViewConfiguration;

import android.view.animation.AnimationUtils;
@@ -108,6 +109,8 @@ public class Scroller { 
    private float mDeceleration;

    private final float mPpi;



    private final PowerManager mPm;



    // A context-specific coefficient adjusted to physical values.

    private float mPhysicalCoeff;
@@ -184,6 +187,8 @@ public class Scroller { 
        mFlywheel = flywheel;



        mPhysicalCoeff = computeDeceleration(0.84f); // look and feel tuning



        mPm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);

    }



    /**
@@ -407,6 +412,8 @@ public class Scroller { 
        mDeltaX = dx;

        mDeltaY = dy;

        mDurationReciprocal = 1.0f / (float) mDuration;



        mPm.cpuBoost(duration * 1000);

    }



    /**