- 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
@@ -10,8 +10,9 @@
 
 using namespace Opie;
 
 
+
 OpieScreenSaver::OpieScreenSaver ( )
                 : QObject ( 0, "screensaver" ), QWSScreenSaver ( )
 {
         m_disable_suspend = 100;
@@ -26,8 +27,9 @@ OpieScreenSaver::OpieScreenSaver ( )
         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;
@@ -172,10 +174,24 @@ void OpieScreenSaver::setBacklight ( int bright )
         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 );
 }
@@ -206,9 +222,26 @@ void OpieScreenSaver::setBacklightInternal ( int 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 );
 }
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
@@ -46,8 +46,21 @@ private:
 
         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;