Android Q优化自动背光调节

1.背光曲线调节
Android Q自动背光曲线调节

Index: device/softwinner/ceres-b3/overlay/frameworks/base/core/res/res/values/config.xml
===================================================================
--- device/softwinner/ceres-b3/overlay/frameworks/base/core/res/res/values/config.xml   (revision 14239)
+++ device/softwinner/ceres-b3/overlay/frameworks/base/core/res/res/values/config.xml   (working copy)
@@ -746,13 +746,25 @@
         <item>399.81</item>
     </array>
     <array name="config_autoBrightnessDisplayValuesNits">
-        <item>11</item>
-        <item>19</item>
-        <item>31</item>
-        <item>70</item>
-        <item>100</item>
-        <item>156</item>
-        <item>255</item>
+       <item>33.07</item>         <!-- 0-16 -->
+       <item>49.81</item>         <!-- 16-32 -->
+       <item>65.02</item>         <!-- 32-50 -->
+       <item>80.2</item>          <!-- 50-100 -->
+       <item>96.75</item>         <!-- 100-140 -->
+       <item>111.8</item>         <!-- 140-180 -->
+       <item>144.3</item>         <!-- 180-240 -->
+       <item>144.3</item>         <!-- 240-300 -->
+       <item>144.3</item>         <!-- 300-600 -->
+       <item>144.3</item>         <!-- 600-800 -->
+       <item>144.3</item>         <!-- 800-1000 -->
+       <item>260.0</item>         <!-- 1000-2000 -->
+       <item>288.5</item>         <!-- 2000-3000 -->
+       <item>302.0</item>         <!-- 3000-4000 -->
+       <item>308.7</item>         <!-- 4000-5000 -->
+       <item>315.4</item>         <!-- 5000-6000 -->
+       <item>330.0</item>         <!-- 6000-8000 -->
+       <item>363.6</item>         <!-- 8000-10000 -->
+       <item>366.6</item>         <!-- 10000+ -->
    </array>
 
     <bool name="config_shutdownForceScreenOff">true</bool>
@@ -780,11 +792,24 @@
 
          Must be overridden in platform specific overlays -->
     <integer-array name="config_autoBrightnessLevels">
-        <item>20</item>
+        <item>16</item>
+        <item>32</item>
         <item>50</item>
-        <item>145</item>
-        <item>350</item>
-        <item>1250</item>
+        <item>100</item>
+        <item>140</item>
+        <item>180</item>
+        <item>240</item>
+        <item>300</item>
+        <item>600</item>
+        <item>800</item>
+        <item>1000</item>
+        <item>2000</item>
+        <item>3000</item>
+        <item>4000</item>
+        <item>5000</item>
+        <item>6000</item>
+        <item>8000</item>
+        <item>10000</item>
     </integer-array>
     <!--
     <integer-array name="config_autoBrightnessLevels">

2.配置了曲线，光感有效果了，但是效果太过突兀，添加一个过渡动画

Index: frameworks/base/services/core/java/com/android/server/display/DisplayPowerController.java
===================================================================
--- frameworks/base/services/core/java/com/android/server/display/DisplayPowerController.java   (revision 14239)
+++ frameworks/base/services/core/java/com/android/server/display/DisplayPowerController.java   (working copy)
@@ -951,7 +951,7 @@
                 // before applying the low power or dim transformations so that the slider
                 // accurately represents the full possible range, even if they range changes what
                 // it means in absolute terms.
-                putScreenBrightnessSetting(brightness);
+                //putScreenBrightnessSetting(brightness);
                 mAppliedAutoBrightness = true;
                 mBrightnessReasonTemp.setReason(BrightnessReason.REASON_AUTOMATIC);
             } else {
@@ -1055,7 +1055,9 @@
                     mAppliedTemporaryBrightness || mAppliedTemporaryAutoBrightnessAdjustment;
             if (initialRampSkip || hasBrightnessBuckets
                     || wasOrWillBeInVr || !isDisplayContentVisible || brightnessIsTemporary) {
-                animateScreenBrightness(brightness, 0);
+                //animateScreenBrightness(brightness, 0);
+                animateScreenBrightness(brightness,
+                        slowChange ? mBrightnessRampRateSlow : mBrightnessRampRateFast);
             } else {
                 animateScreenBrightness(brightness,
                         slowChange ? mBrightnessRampRateSlow : mBrightnessRampRateFast);
@@ -1297,6 +1299,7 @@
         }
         if (mScreenBrightnessRampAnimator.animateTo(target, rate)) {
             Trace.traceCounter(Trace.TRACE_TAG_POWER, "TargetScreenBrightness", target);
+            putScreenBrightnessSetting(target);
             try {
                 mBatteryStats.noteScreenBrightness(target);
             } catch (RemoteException ex) {
@@ -1613,6 +1616,7 @@
 
     private void putScreenBrightnessSetting(int brightness) {
         mCurrentScreenBrightnessSetting = brightness;
+        //android.util.Log.e(TAG,"mCurrentScreenBrightnessSetting="+mCurrentScreenBrightnessSetting);
         Settings.System.putIntForUser(mContext.getContentResolver(),
                 Settings.System.SCREEN_BRIGHTNESS, brightness, UserHandle.USER_CURRENT);
     }