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Commit 44a28444 authored by Fiona Campbell's avatar Fiona Campbell Committed by Automerger Merge Worker
Browse files

Merge "Fix brightness curve when user sets slider to min." into rvc-dev am: 4736a082 

Change-Id: I43a00bd95d1f21091456afc04f6618c2762981b4
parents 85d6bd2b 4736a082

services/core/java/com/android/server/display/BrightnessMappingStrategy.java

+8 −1
Original line number Diff line number Diff line
@@ -51,6 +51,11 @@ public abstract class BrightnessMappingStrategy { 
    private static final float MAX_GRAD = 1.0f;

    private static final float SHORT_TERM_MODEL_THRESHOLD_RATIO = 0.6f;



    // Constant that ensures that each step of the curve can increase by up to at least

    // MIN_PERMISSABLE_INCREASE. Otherwise when the brightness is set to 0, the curve will never

    // increase and will always be 0.

    private static final float MIN_PERMISSABLE_INCREASE =  0.004f;



    protected boolean mLoggingEnabled;



    private static final Plog PLOG = Plog.createSystemPlog(TAG);
@@ -400,7 +405,9 @@ public abstract class BrightnessMappingStrategy { 
        for (int i = idx+1; i < lux.length; i++) {

            float currLux = lux[i];

            float currBrightness = brightness[i];

            float maxBrightness = prevBrightness * permissibleRatio(currLux, prevLux);

            float maxBrightness = MathUtils.max(

                    prevBrightness * permissibleRatio(currLux, prevLux),

                    prevBrightness + MIN_PERMISSABLE_INCREASE);

            float newBrightness = MathUtils.constrain(

                    currBrightness, prevBrightness, maxBrightness);

            if (newBrightness == currBrightness) {