- OpieScreenSaver now uses the calibration data for the light sensor

2 files changed, 48 insertions, 2 deletions

diff --git a/core/launcher/screensaver.cpp b/core/launcher/screensaver.cpp
index 9e823ff..741591e 100644
--- a/core/launcher/screensaver.cpp
+++ b/core/launcher/screensaver.cpp
@@ -2,40 +2,42 @@
 #include "screensaver.h"
 
 #include <qpe/config.h>
 #include <qpe/power.h>
 #include <qpe/network.h>
 
 #include <opie/odevice.h>
 
 
 using namespace Opie;
 
 
+
 OpieScreenSaver::OpieScreenSaver ( )
 		: QObject ( 0, "screensaver" ), QWSScreenSaver ( )
 {
 	m_disable_suspend = 100;
 	m_enable_dim = false;
 	m_enable_lightoff = false;
 	m_enable_suspend = false;
 	m_onlylcdoff = false;
 
 	m_enable_dim_ac = false;
 	m_enable_lightoff_ac = false;
 	m_enable_suspend_ac = false;
 	m_onlylcdoff_ac = false;
 
 	m_use_light_sensor = false;
 	m_backlight_sensor = -1;
+	::memset ( m_sensordata, 0xff, LS_Count * sizeof( m_sensordata [0] ));
 
 	m_lcd_status = true;
 
 	m_backlight_normal = -1;
 	m_backlight_current = -1;
 	m_backlight_forcedoff = false;
 
 	m_on_ac = false;
 
 	m_level = -1;
 
 	// Make sure the LCD is in fact on, (if opie was killed while the LCD is off it would still be off)
@@ -164,26 +166,40 @@ void OpieScreenSaver::setBacklight ( int bright )
 {
 	// Read from config
 	Config config ( "apm" );
 	config. setGroup ( m_on_ac ? "AC" : "Battery" );
 	m_backlight_normal = config. readNumEntry ( "Brightness", 255 );
 
 	m_use_light_sensor = config. readBoolEntry ( "LightSensor", false );
 
 	qDebug ( "setBacklight: %d (ls: %d)", m_backlight_normal, m_use_light_sensor ? 1 : 0 );
 
 	killTimers ( );
 	if ( m_use_light_sensor ) {
+		QStringList sl = config. readListEntry ( "LightSensorData", ';' );
+		
+		m_sensordata [LS_SensorMin] = 40;
+		m_sensordata [LS_SensorMax] = 215;
+		m_sensordata [LS_LightMin] = 1;
+		m_sensordata [LS_LightMax] = 255;
+		m_sensordata [LS_Steps] = 12;
+		m_sensordata [LS_Interval] = 2000;		
+		
+		for ( uint i = 0; i < LS_Count; i++ ) {
+			if ( i < sl. count ( ))
+				m_sensordata [i] = sl [i]. toInt ( );
+		}
+
 		timerEvent ( 0 );
-		startTimer ( 2000 );
+		startTimer ( m_sensordata [LS_Interval] );
 	}
 
 	setBacklightInternal ( bright );
 }
 
 
 void OpieScreenSaver::setBacklightInternal ( int bright )
 {
 	if ( bright == -3 ) {
 		// Forced on
 		m_backlight_forcedoff = false;
 		bright = -1;
@@ -198,25 +214,42 @@ void OpieScreenSaver::setBacklightInternal ( int bright )
 	if ( bright == -1 )
 		bright = m_use_light_sensor ? m_backlight_sensor : m_backlight_normal;
 
 	if ( bright != m_backlight_current ) {
 		ODevice::inst ( )-> setDisplayBrightness ( bright );
 		m_backlight_current = bright;
 	}
 }
 
 
 void OpieScreenSaver::timerEvent ( QTimerEvent * )
 {
-	m_backlight_sensor = (( 255 - ODevice::inst ( )-> readLightSensor ( )) * m_backlight_normal ) / 255;
+	int s = ODevice::inst ( )-> readLightSensor ( );
+	
+	if ( s < m_sensordata [LS_SensorMin] )
+		m_backlight_sensor = m_sensordata [LS_LightMax];
+	else if ( s >= m_sensordata [LS_SensorMax] )
+		m_backlight_sensor = m_sensordata [LS_LightMin];
+	else {
+		int dx = m_sensordata [LS_SensorMax] - m_sensordata [LS_SensorMin];
+		int dy = m_sensordata [LS_LightMax] - m_sensordata [LS_LightMin];
+		
+		int stepno = ( s - m_sensordata [LS_SensorMin] ) * m_sensordata [LS_Steps] / dx;
+		
+		m_backlight_sensor = m_sensordata [LS_LightMax] - dy * stepno / ( m_sensordata [LS_Steps] - 1 );
+	}
+	if ( !m_backlight_sensor )
+		m_backlight_sensor = 1;
+
+	// qDebug ( "f(%d) = %d [%d - %d] -> [%d - %d] / %d", s, m_backlight_sensor, m_sensordata [LS_SensorMin], m_sensordata [LS_SensorMax], m_sensordata [LS_LightMin], m_sensordata [LS_LightMax], m_sensordata [LS_Steps] );
 
 	if ( m_level <= 0 )
 		setBacklightInternal ( -1 );
 }
 
 
 void OpieScreenSaver::setDisplayState ( bool on )
 {
 	if ( m_lcd_status != on ) {
 		ODevice::inst ( ) -> setDisplayStatus ( on );
 		m_lcd_status = on;
 	}
diff --git a/core/launcher/screensaver.h b/core/launcher/screensaver.h
index 9126f33..da10a8d 100644
--- a/core/launcher/screensaver.h
+++ b/core/launcher/screensaver.h
@@ -38,24 +38,37 @@ private:
 	bool m_enable_lightoff;
 	bool m_enable_suspend;
 	bool m_onlylcdoff;
 
 	bool m_enable_dim_ac;
 	bool m_enable_lightoff_ac;
 	bool m_enable_suspend_ac;
 	bool m_onlylcdoff_ac;
 
 	bool m_use_light_sensor;
 	int m_backlight_sensor;
 
+	enum {
+		LS_Interval = 0,
+		LS_Steps,
+		LS_SensorMin,
+		LS_SensorMax,
+		LS_LightMin,
+		LS_LightMax,
+	
+		LS_Count
+	};
+
+	int m_sensordata [LS_Count];
+
 	bool m_lcd_status;
 
 	int m_backlight_normal;
 	int m_backlight_current;
 	bool m_backlight_forcedoff;
 
 	bool m_on_ac;
 	
 	int m_level;
 };
 
 #endif