Merge "Reduce the jitter offset in dream overlay." into tm-qpr-dev

    <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>

    }

    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);