Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 20c34f3f authored by Will's avatar Will
Browse files

Reduce the jitter offset in dream overlay. 

This change reduces the jitter offset in dream overlay by about half,
which should still be sufficient jitter to avoid screen burn-in effects.

Test: atest DreamOverlayContainerViewControllerTest
Bug: 229893428
Change-Id: Icdbf832b6a848c7085dda09708045e678fd2b313
parent 8c08010a

packages/SystemUI/res/values/config.xml

+1 −1
Original line number Diff line number Diff line
@@ -690,7 +690,7 @@ 
    <string name="config_communalSourceConnector" translatable="false"></string>



    <!-- How often in milliseconds to jitter the dream overlay in order to avoid burn-in. -->

    <integer name="config_dreamOverlayBurnInProtectionUpdateIntervalMillis">500</integer>

    <integer name="config_dreamOverlayBurnInProtectionUpdateIntervalMillis">1000</integer>



    <!-- How long in milliseconds before full burn-in protection is achieved. -->

    <integer name="config_dreamOverlayMillisUntilFullJitter">240000</integer>

packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayContainerViewController.java

+8 −8
Original line number Diff line number Diff line
@@ -183,22 +183,22 @@ public class DreamOverlayContainerViewController extends ViewController<DreamOve 
    }



    private void updateBurnInOffsets() {

        int burnInOffset = mMaxBurnInOffset;



        // Make sure the offset starts at zero, to avoid a big jump in the overlay when it first

        // appears.

        long millisSinceStart = System.currentTimeMillis() - mJitterStartTimeMillis;

        final long millisSinceStart = System.currentTimeMillis() - mJitterStartTimeMillis;

        final int burnInOffset;

        if (millisSinceStart < mMillisUntilFullJitter) {

            float lerpAmount = (float) millisSinceStart / (float) mMillisUntilFullJitter;

            burnInOffset = Math.round(MathUtils.lerp(0f, burnInOffset, lerpAmount));

            burnInOffset = Math.round(MathUtils.lerp(0f, mMaxBurnInOffset, lerpAmount));

        } else {

            burnInOffset = mMaxBurnInOffset;

        }



        // These translation values change slowly, and the set translation methods are idempotent,

        // so no translation occurs when the values don't change.

        int burnInOffsetX = getBurnInOffset(burnInOffset * 2, true)

                - burnInOffset;

        int burnInOffsetY = getBurnInOffset(burnInOffset * 2, false)

                - burnInOffset;

        final int halfBurnInOffset = burnInOffset / 2;

        final int burnInOffsetX = getBurnInOffset(burnInOffset, true) - halfBurnInOffset;

        final int burnInOffsetY = getBurnInOffset(burnInOffset, false) - halfBurnInOffset;

        mView.setTranslationX(burnInOffsetX);

        mView.setTranslationY(burnInOffsetY);