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Move backlight brightness from HardwareService to PowerManager

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to prevent apps from changing the hardware behind its back.
Fixes b/2041941 Lock screen flashes the screen very bright before dimming

Change-Id: Ice757f7ae87902bdfb3634471cf44f020ebfaae4
Signed-off-by: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Mike Lockwood
2009-09-15 14:42:16 -04:00
parent f02c0740d3
commit 237a29923a
9 changed files with 85 additions and 61 deletions
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36
services/java/com/android/server/PowerManagerService.java
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@@ -2061,6 +2061,42 @@ class PowerManagerService extends IPowerManager.Stub
return result;
}
public void setBacklightBrightness(int brightness) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
// Don't let applications turn the screen all the way off
brightness = Math.max(brightness, Power.BRIGHTNESS_DIM);
mHardware.setLightBrightness_UNCHECKED(HardwareService.LIGHT_ID_BACKLIGHT, brightness);
mHardware.setLightBrightness_UNCHECKED(HardwareService.LIGHT_ID_KEYBOARD, brightness);
mHardware.setLightBrightness_UNCHECKED(HardwareService.LIGHT_ID_BUTTONS, brightness);
long identity = Binder.clearCallingIdentity();
try {
mBatteryStats.noteScreenBrightness(brightness);
} catch (RemoteException e) {
Log.w(TAG, "RemoteException calling noteScreenBrightness on BatteryStatsService", e);
} finally {
Binder.restoreCallingIdentity(identity);
}
// update our animation state
if (ANIMATE_SCREEN_LIGHTS) {
mScreenBrightness.curValue = brightness;
mScreenBrightness.animating = false;
}
if (ANIMATE_KEYBOARD_LIGHTS) {
mKeyboardBrightness.curValue = brightness;
mKeyboardBrightness.animating = false;
}
if (ANIMATE_BUTTON_LIGHTS) {
mButtonBrightness.curValue = brightness;
mButtonBrightness.animating = false;
}
}
public void setAutoBrightness(boolean on) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
mHardware.setAutoBrightness_UNCHECKED(on);
}
private SensorManager getSensorManager() {
if (mSensorManager == null) {
mSensorManager = new SensorManager(mHandlerThread.getLooper());