Merge "Fix brightness curve when user sets slider to min." into rvc-dev am:... (5cbb360b) · Commits · e / os / android_frameworks_base

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) {