Add SetTapMaximumAllowedTime
[platform/core/uifw/dali-adaptor.git] / dali / internal / system / common / environment-options.cpp
index 1d00be7..6de61e0 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2021 Samsung Electronics Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
 #include <dali/internal/system/common/environment-options.h>
 
 // EXTERNAL INCLUDES
-#include <cstdlib>
 #include <dali/integration-api/render-controller.h>
 #include <dali/public-api/math/math-utils.h>
+#include <cstdlib>
+#include <functional>
 
 // INTERNAL INCLUDES
-#include <dali/internal/trace/common/trace-factory.h>
 #include <dali/internal/system/common/environment-variables.h>
+#include <dali/internal/trace/common/trace-factory.h>
 
 namespace Dali
 {
-
 namespace Internal
 {
-
 namespace Adaptor
 {
-
 namespace
 {
-const unsigned int DEFAULT_STATISTICS_LOG_FREQUENCY = 2;
-const int DEFAULT_MULTI_SAMPLING_LEVEL = -1;
-const bool DEFAULT_DEPTH_BUFFER_REQUIRED_SETTING = true;
-const bool DEFAULT_STENCIL_BUFFER_REQUIRED_SETTING = true;
-const bool DEFAULT_PARTIAL_UPDATE_REQUIRED_SETTING = false;
+const unsigned int DEFAULT_STATISTICS_LOG_FREQUENCY        = 2;
+const int          DEFAULT_MULTI_SAMPLING_LEVEL            = -1;
+const bool         DEFAULT_DEPTH_BUFFER_REQUIRED_SETTING   = true;
+const bool         DEFAULT_STENCIL_BUFFER_REQUIRED_SETTING = true;
+const bool         DEFAULT_PARTIAL_UPDATE_REQUIRED_SETTING = true;
 
-unsigned int GetIntegerEnvironmentVariable( const char* variable, unsigned int defaultValue )
+unsigned int GetEnvironmentVariable(const char* variable, unsigned int defaultValue)
 {
   const char* variableParameter = std::getenv(variable);
 
@@ -53,11 +51,11 @@ unsigned int GetIntegerEnvironmentVariable( const char* variable, unsigned int d
   return intValue;
 }
 
-bool GetIntegerEnvironmentVariable( const char* variable, int& intValue )
+bool GetEnvironmentVariable(const char* variable, int& intValue)
 {
   const char* variableParameter = std::getenv(variable);
 
-  if( !variableParameter )
+  if(!variableParameter)
   {
     return false;
   }
@@ -66,11 +64,11 @@ bool GetIntegerEnvironmentVariable( const char* variable, int& intValue )
   return true;
 }
 
-bool GetFloatEnvironmentVariable( const char* variable, float& floatValue )
+bool GetEnvironmentVariable(const char* variable, float& floatValue)
 {
   const char* variableParameter = std::getenv(variable);
 
-  if( !variableParameter )
+  if(!variableParameter)
   {
     return false;
   }
@@ -79,60 +77,175 @@ bool GetFloatEnvironmentVariable( const char* variable, float& floatValue )
   return true;
 }
 
-const char * GetCharEnvironmentVariable( const char * variable )
+void SetFromEnvironmentVariable(const char* variable, std::string& stringValue)
 {
-  return std::getenv( variable );
+  const char* charValue = std::getenv(variable);
+  if(charValue)
+  {
+    stringValue = charValue;
+  }
 }
 
+template<typename Type>
+void SetFromEnvironmentVariable(const char* variable, Type& memberVariable)
+{
+  Type envVarValue = -1;
+  if(GetEnvironmentVariable(variable, envVarValue))
+  {
+    memberVariable = envVarValue;
+  }
+}
+
+template<typename Type>
+void SetFromEnvironmentVariable(const char* variable, std::function<void(Type)> function)
+{
+  Type envVarValue = -1;
+  if(GetEnvironmentVariable(variable, envVarValue))
+  {
+    function(envVarValue);
+  }
+}
+
+/// Provides a functor which ensures a non-negative number is set for the given member variable
+struct MinimumZero
+{
+  MinimumZero(int& memberValue)
+  : mMemberValue(memberValue)
+  {
+  }
+
+  void operator()(int value)
+  {
+    // Negative Amounts do not make sense
+    mMemberValue = std::max(0, value);
+  }
+
+  int& mMemberValue;
+};
+
+/// Provides a functor which clamps the environment variable between 0.0f and 1.0f
+struct ClampBetweenZeroAndOne
+{
+  ClampBetweenZeroAndOne(float& memberValue)
+  : mMemberValue(memberValue)
+  {
+  }
+
+  void operator()(float value)
+  {
+    value        = Clamp(value, 0.0f, 1.0f);
+    mMemberValue = value;
+  }
+
+  float& mMemberValue;
+};
+
+/// Provides a functor which only sets the member variable if the environment variable value is greater than the specified constant
+struct GreaterThan
+{
+  GreaterThan(unsigned int& memberValue, int greaterThanValue)
+  : mMemberValue(memberValue),
+    mGreaterThanValue(greaterThanValue)
+  {
+  }
+
+  void operator()(int value)
+  {
+    if(value > mGreaterThanValue)
+    {
+      mMemberValue = value;
+    }
+  }
+
+  unsigned int& mMemberValue;
+  const int     mGreaterThanValue;
+};
+
+/// Provides a functor which sets the member to 1 if if the environment variable value is not zero
+struct EnableIfNonZero
+{
+  EnableIfNonZero(int& memberValue)
+  : mMemberValue(memberValue)
+  {
+  }
+
+  void operator()(int value)
+  {
+    mMemberValue = (value == 0) ? 0 : 1;
+  }
+
+  int& mMemberValue;
+};
+
+/// Provides a functor which sets the member to false if the environment variable value is not zero
+struct DisableIfNonZero
+{
+  DisableIfNonZero(bool& memberValue)
+  : mMemberValue(memberValue)
+  {
+  }
+
+  void operator()(int value)
+  {
+    if(value > 0)
+    {
+      mMemberValue = false;
+    }
+  }
+
+  bool& mMemberValue;
+};
+
 } // unnamed namespace
 
 EnvironmentOptions::EnvironmentOptions()
-: mLogFunction( NULL ),
+: mLogFunction(NULL),
   mWindowName(),
   mWindowClassName(),
-  mNetworkControl( 0 ),
-  mFpsFrequency( 0 ),
-  mUpdateStatusFrequency( 0 ),
-  mObjectProfilerInterval( 0 ),
-  mPerformanceStatsLevel( 0 ),
-  mPerformanceStatsFrequency( DEFAULT_STATISTICS_LOG_FREQUENCY ),
-  mPerformanceTimeStampOutput( 0 ),
-  mPanGestureLoggingLevel( 0 ),
-  mWindowWidth( 0u ),
-  mWindowHeight( 0u ),
-  mRenderRefreshRate( 1u ),
-  mMaxTextureSize( 0 ),
-  mRenderToFboInterval( 0u ),
-  mPanGesturePredictionMode( -1 ),
-  mPanGesturePredictionAmount( -1 ), ///< only sets value in pan gesture if greater than 0
-  mPanGestureMaxPredictionAmount( -1 ),
-  mPanGestureMinPredictionAmount( -1 ),
-  mPanGesturePredictionAmountAdjustment( -1 ),
-  mPanGestureSmoothingMode( -1 ),
-  mPanGestureSmoothingAmount( -1.0f ),
-  mPanGestureUseActualTimes( -1 ),
-  mPanGestureInterpolationTimeRange( -1 ),
-  mPanGestureScalarOnlyPredictionEnabled( -1 ),
-  mPanGestureTwoPointPredictionEnabled( -1 ),
-  mPanGestureTwoPointInterpolatePastTime( -1 ),
-  mPanGestureTwoPointVelocityBias( -1.0f ),
-  mPanGestureTwoPointAccelerationBias( -1.0f ),
-  mPanGestureMultitapSmoothingRange( -1 ),
-  mPanMinimumDistance( -1 ),
-  mPanMinimumEvents( -1 ),
-  mPinchMinimumDistance( -1.0f ),
-  mPinchMinimumTouchEvents( -1 ),
-  mPinchMinimumTouchEventsAfterStart( -1 ),
-  mRotationMinimumTouchEvents( -1 ),
-  mRotationMinimumTouchEventsAfterStart( -1 ),
-  mLongPressMinimumHoldingTime( -1 ),
-  mGlesCallTime( 0 ),
-  mMultiSamplingLevel( DEFAULT_MULTI_SAMPLING_LEVEL ),
-  mThreadingMode( ThreadingMode::COMBINED_UPDATE_RENDER ),
-  mGlesCallAccumulate( false ),
-  mDepthBufferRequired( DEFAULT_DEPTH_BUFFER_REQUIRED_SETTING ),
-  mStencilBufferRequired( DEFAULT_STENCIL_BUFFER_REQUIRED_SETTING ),
-  mPartialUpdateRequired( DEFAULT_PARTIAL_UPDATE_REQUIRED_SETTING )
+  mNetworkControl(0),
+  mFpsFrequency(0),
+  mUpdateStatusFrequency(0),
+  mObjectProfilerInterval(0),
+  mPerformanceStatsLevel(0),
+  mPerformanceStatsFrequency(DEFAULT_STATISTICS_LOG_FREQUENCY),
+  mPerformanceTimeStampOutput(0),
+  mPanGestureLoggingLevel(0),
+  mWindowWidth(0u),
+  mWindowHeight(0u),
+  mRenderRefreshRate(1u),
+  mMaxTextureSize(0),
+  mRenderToFboInterval(0u),
+  mPanGesturePredictionMode(-1),
+  mPanGesturePredictionAmount(-1), ///< only sets value in pan gesture if greater than 0
+  mPanGestureMaxPredictionAmount(-1),
+  mPanGestureMinPredictionAmount(-1),
+  mPanGesturePredictionAmountAdjustment(-1),
+  mPanGestureSmoothingMode(-1),
+  mPanGestureSmoothingAmount(-1.0f),
+  mPanGestureUseActualTimes(-1),
+  mPanGestureInterpolationTimeRange(-1),
+  mPanGestureScalarOnlyPredictionEnabled(-1),
+  mPanGestureTwoPointPredictionEnabled(-1),
+  mPanGestureTwoPointInterpolatePastTime(-1),
+  mPanGestureTwoPointVelocityBias(-1.0f),
+  mPanGestureTwoPointAccelerationBias(-1.0f),
+  mPanGestureMultitapSmoothingRange(-1),
+  mPanMinimumDistance(-1),
+  mPanMinimumEvents(-1),
+  mPinchMinimumDistance(-1.0f),
+  mPinchMinimumTouchEvents(-1),
+  mPinchMinimumTouchEventsAfterStart(-1),
+  mRotationMinimumTouchEvents(-1),
+  mRotationMinimumTouchEventsAfterStart(-1),
+  mLongPressMinimumHoldingTime(-1),
+  mTapMaximumAllowedTime(-1),
+  mGlesCallTime(0),
+  mMultiSamplingLevel(DEFAULT_MULTI_SAMPLING_LEVEL),
+  mThreadingMode(ThreadingMode::COMBINED_UPDATE_RENDER),
+  mGlesCallAccumulate(false),
+  mDepthBufferRequired(DEFAULT_DEPTH_BUFFER_REQUIRED_SETTING),
+  mStencilBufferRequired(DEFAULT_STENCIL_BUFFER_REQUIRED_SETTING),
+  mPartialUpdateRequired(DEFAULT_PARTIAL_UPDATE_REQUIRED_SETTING)
 {
   ParseEnvironmentOptions();
 }
@@ -141,27 +254,27 @@ EnvironmentOptions::~EnvironmentOptions()
 {
 }
 
-void EnvironmentOptions::CreateTraceManager( PerformanceInterface* performanceInterface )
+void EnvironmentOptions::CreateTraceManager(PerformanceInterface* performanceInterface)
 {
-  mTraceManager = TraceManagerFactory::CreateTraceFactory( performanceInterface );
+  mTraceManager = TraceManagerFactory::CreateTraceFactory(performanceInterface);
 }
 
 void EnvironmentOptions::InstallTraceFunction() const
 {
-  if( mTraceManager )
+  if(mTraceManager)
   {
     mTraceManager->Initialise();
   }
 }
 
-void EnvironmentOptions::SetLogFunction( const Dali::Integration::Log::LogFunction& logFunction )
+void EnvironmentOptions::SetLogFunction(const Dali::Integration::Log::LogFunction& logFunction)
 {
   mLogFunction = logFunction;
 }
 
 void EnvironmentOptions::InstallLogFunction() const
 {
-  Dali::Integration::Log::InstallLogFunction( mLogFunction );
+  Dali::Integration::Log::InstallLogFunction(mLogFunction);
 }
 
 void EnvironmentOptions::UnInstallLogFunction() const
@@ -321,6 +434,11 @@ int EnvironmentOptions::GetLongPressMinimumHoldingTime() const
   return mLongPressMinimumHoldingTime;
 }
 
+int EnvironmentOptions::GetTapMaximumAllowedTime() const
+{
+  return mTapMaximumAllowedTime;
+}
+
 unsigned int EnvironmentOptions::GetWindowWidth() const
 {
   return mWindowWidth;
@@ -378,9 +496,9 @@ unsigned int EnvironmentOptions::GetRenderToFboInterval() const
 
 bool EnvironmentOptions::PerformanceServerRequired() const
 {
-  return ( ( GetPerformanceStatsLoggingOptions() > 0) ||
-           ( GetPerformanceTimeStampOutput() > 0 ) ||
-           ( GetNetworkControlMode() > 0) );
+  return ((GetPerformanceStatsLoggingOptions() > 0) ||
+          (GetPerformanceTimeStampOutput() > 0) ||
+          (GetNetworkControlMode() > 0));
 }
 
 bool EnvironmentOptions::DepthBufferRequired() const
@@ -401,285 +519,98 @@ bool EnvironmentOptions::PartialUpdateRequired() const
 void EnvironmentOptions::ParseEnvironmentOptions()
 {
   // get logging options
-  mFpsFrequency = GetIntegerEnvironmentVariable( DALI_ENV_FPS_TRACKING, 0 );
-  mUpdateStatusFrequency = GetIntegerEnvironmentVariable( DALI_ENV_UPDATE_STATUS_INTERVAL, 0 );
-  mObjectProfilerInterval = GetIntegerEnvironmentVariable( DALI_ENV_OBJECT_PROFILER_INTERVAL, 0 );
-  mPerformanceStatsLevel = GetIntegerEnvironmentVariable( DALI_ENV_LOG_PERFORMANCE_STATS, 0 );
-  mPerformanceStatsFrequency = GetIntegerEnvironmentVariable( DALI_ENV_LOG_PERFORMANCE_STATS_FREQUENCY, 0 );
-  mPerformanceTimeStampOutput = GetIntegerEnvironmentVariable( DALI_ENV_PERFORMANCE_TIMESTAMP_OUTPUT, 0 );
-  mNetworkControl = GetIntegerEnvironmentVariable( DALI_ENV_NETWORK_CONTROL, 0 );
-  mPanGestureLoggingLevel = GetIntegerEnvironmentVariable( DALI_ENV_LOG_PAN_GESTURE, 0 );
-
-  int predictionMode;
-  if( GetIntegerEnvironmentVariable(DALI_ENV_PAN_PREDICTION_MODE, predictionMode) )
-  {
-    mPanGesturePredictionMode = predictionMode;
-  }
-  int predictionAmount(-1);
-  if( GetIntegerEnvironmentVariable(DALI_ENV_PAN_PREDICTION_AMOUNT, predictionAmount) )
-  {
-    if( predictionAmount < 0 )
-    {
-      // do not support times in the past
-      predictionAmount = 0;
-    }
-    mPanGesturePredictionAmount = predictionAmount;
-  }
-  int minPredictionAmount(-1);
-  if( GetIntegerEnvironmentVariable(DALI_ENV_PAN_MIN_PREDICTION_AMOUNT, minPredictionAmount) )
-  {
-    if( minPredictionAmount < 0 )
-    {
-      // do not support times in the past
-      minPredictionAmount = 0;
-    }
-    mPanGestureMinPredictionAmount = minPredictionAmount;
-  }
-  int maxPredictionAmount(-1);
-  if( GetIntegerEnvironmentVariable(DALI_ENV_PAN_MAX_PREDICTION_AMOUNT, maxPredictionAmount) )
-  {
-    if( minPredictionAmount > -1 && maxPredictionAmount < minPredictionAmount )
-    {
-      // maximum amount should not be smaller than minimum amount
-      maxPredictionAmount = minPredictionAmount;
-    }
-    mPanGestureMaxPredictionAmount = maxPredictionAmount;
-  }
-  int predictionAmountAdjustment(-1);
-  if( GetIntegerEnvironmentVariable(DALI_ENV_PAN_PREDICTION_AMOUNT_ADJUSTMENT, predictionAmountAdjustment) )
-  {
-    if( predictionAmountAdjustment < 0 )
-    {
-      // negative amount doesn't make sense
-      predictionAmountAdjustment = 0;
-    }
-    mPanGesturePredictionAmountAdjustment = predictionAmountAdjustment;
-  }
-  int smoothingMode;
-  if( GetIntegerEnvironmentVariable(DALI_ENV_PAN_SMOOTHING_MODE, smoothingMode) )
-  {
-    mPanGestureSmoothingMode = smoothingMode;
-  }
-  float smoothingAmount = 1.0f;
-  if( GetFloatEnvironmentVariable(DALI_ENV_PAN_SMOOTHING_AMOUNT, smoothingAmount) )
-  {
-    smoothingAmount = Clamp(smoothingAmount, 0.0f, 1.0f);
-    mPanGestureSmoothingAmount = smoothingAmount;
-  }
-
-  int useActualTimes( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_PAN_USE_ACTUAL_TIMES, useActualTimes ) )
-  {
-    mPanGestureUseActualTimes = useActualTimes == 0 ? 0 : 1;
-  }
-
-  int interpolationTimeRange( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_PAN_INTERPOLATION_TIME_RANGE, interpolationTimeRange ) )
-  {
-    if( interpolationTimeRange < 0 )
-    {
-      interpolationTimeRange = 0;
-    }
-    mPanGestureInterpolationTimeRange = interpolationTimeRange;
-  }
-
-  int scalarOnlyPredictionEnabled( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_PAN_SCALAR_ONLY_PREDICTION_ENABLED, scalarOnlyPredictionEnabled ) )
-  {
-    mPanGestureScalarOnlyPredictionEnabled = scalarOnlyPredictionEnabled == 0 ? 0 : 1;
-  }
-
-  int twoPointPredictionEnabled( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_PAN_TWO_POINT_PREDICTION_ENABLED, twoPointPredictionEnabled ) )
-  {
-    mPanGestureTwoPointPredictionEnabled = twoPointPredictionEnabled == 0 ? 0 : 1;
-  }
-
-  int twoPointPastInterpolateTime( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_PAN_TWO_POINT_PAST_INTERPOLATE_TIME, twoPointPastInterpolateTime ) )
-  {
-    if( twoPointPastInterpolateTime < 0 )
-    {
-      twoPointPastInterpolateTime = 0;
-    }
-    mPanGestureTwoPointInterpolatePastTime = twoPointPastInterpolateTime;
-  }
-
-  float twoPointVelocityBias = -1.0f;
-  if( GetFloatEnvironmentVariable( DALI_ENV_PAN_TWO_POINT_VELOCITY_BIAS, twoPointVelocityBias ) )
-  {
-    twoPointVelocityBias = Clamp( twoPointVelocityBias, 0.0f, 1.0f );
-    mPanGestureTwoPointVelocityBias = twoPointVelocityBias;
-  }
-
-  float twoPointAccelerationBias = -1.0f;
-  if( GetFloatEnvironmentVariable( DALI_ENV_PAN_TWO_POINT_ACCELERATION_BIAS, twoPointAccelerationBias ) )
-  {
-    twoPointAccelerationBias = Clamp( twoPointAccelerationBias, 0.0f, 1.0f );
-    mPanGestureTwoPointAccelerationBias = twoPointAccelerationBias;
-  }
-
-  int multitapSmoothingRange( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_PAN_MULTITAP_SMOOTHING_RANGE, multitapSmoothingRange ) )
-  {
-    if( multitapSmoothingRange < 0 )
-    {
-      multitapSmoothingRange = 0;
-    }
-    mPanGestureMultitapSmoothingRange = multitapSmoothingRange;
-  }
-
-  int minimumDistance(-1);
-  if ( GetIntegerEnvironmentVariable(DALI_ENV_PAN_MINIMUM_DISTANCE, minimumDistance ))
-  {
-    mPanMinimumDistance = minimumDistance;
-  }
-
-  int minimumEvents(-1);
-  if ( GetIntegerEnvironmentVariable(DALI_ENV_PAN_MINIMUM_EVENTS, minimumEvents ))
-  {
-    mPanMinimumEvents = minimumEvents;
-  }
-
-  float pinchMinimumDistance = -1.0f;
-  if( GetFloatEnvironmentVariable( DALI_ENV_PINCH_MINIMUM_DISTANCE, pinchMinimumDistance ) )
-  {
-    mPinchMinimumDistance = pinchMinimumDistance;
-  }
-
-  int pinchMinimumTouchEvents = -1;
-  if( GetIntegerEnvironmentVariable( DALI_ENV_PINCH_MINIMUM_TOUCH_EVENTS, pinchMinimumTouchEvents ) )
-  {
-    mPinchMinimumTouchEvents = pinchMinimumTouchEvents;
-  }
-
-  int pinchMinimumTouchEventsAfterStart = -1;
-  if( GetIntegerEnvironmentVariable( DALI_ENV_PINCH_MINIMUM_TOUCH_EVENTS_AFTER_START, pinchMinimumTouchEventsAfterStart ) )
-  {
-    mPinchMinimumTouchEventsAfterStart = pinchMinimumTouchEventsAfterStart;
-  }
-
-  int rotationMinimumTouchEvents = -1;
-  if( GetIntegerEnvironmentVariable( DALI_ENV_ROTATION_MINIMUM_TOUCH_EVENTS, rotationMinimumTouchEvents ) )
-  {
-    mRotationMinimumTouchEvents = rotationMinimumTouchEvents;
-  }
-
-  int rotationMinimumTouchEventsAfterStart = -1;
-  if( GetIntegerEnvironmentVariable( DALI_ENV_ROTATION_MINIMUM_TOUCH_EVENTS_AFTER_START, rotationMinimumTouchEventsAfterStart ) )
-  {
-    mRotationMinimumTouchEventsAfterStart = rotationMinimumTouchEventsAfterStart;
-  }
-
-  int longPressMinimumHoldingTime = -1;
-  if( GetIntegerEnvironmentVariable( DALI_ENV_LONG_PRESS_MINIMUM_HOLDING_TIME, longPressMinimumHoldingTime ) )
-  {
-    mLongPressMinimumHoldingTime = longPressMinimumHoldingTime;
-  }
-
-  int glesCallTime(0);
-  if ( GetIntegerEnvironmentVariable(DALI_GLES_CALL_TIME, glesCallTime ))
-  {
-    mGlesCallTime = glesCallTime;
-  }
-
-  int glesCallAccumulate( 0 );
-  if ( GetIntegerEnvironmentVariable( DALI_GLES_CALL_ACCUMULATE, glesCallAccumulate ) )
-  {
-    mGlesCallAccumulate = glesCallAccumulate != 0;
-  }
+  mFpsFrequency               = GetEnvironmentVariable(DALI_ENV_FPS_TRACKING, 0);
+  mUpdateStatusFrequency      = GetEnvironmentVariable(DALI_ENV_UPDATE_STATUS_INTERVAL, 0);
+  mObjectProfilerInterval     = GetEnvironmentVariable(DALI_ENV_OBJECT_PROFILER_INTERVAL, 0);
+  mPerformanceStatsLevel      = GetEnvironmentVariable(DALI_ENV_LOG_PERFORMANCE_STATS, 0);
+  mPerformanceStatsFrequency  = GetEnvironmentVariable(DALI_ENV_LOG_PERFORMANCE_STATS_FREQUENCY, 0);
+  mPerformanceTimeStampOutput = GetEnvironmentVariable(DALI_ENV_PERFORMANCE_TIMESTAMP_OUTPUT, 0);
+  mNetworkControl             = GetEnvironmentVariable(DALI_ENV_NETWORK_CONTROL, 0);
+  mPanGestureLoggingLevel     = GetEnvironmentVariable(DALI_ENV_LOG_PAN_GESTURE, 0);
+
+  SetFromEnvironmentVariable(DALI_ENV_PAN_PREDICTION_MODE, mPanGesturePredictionMode);
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_PREDICTION_AMOUNT, MinimumZero(mPanGesturePredictionAmount));
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_MIN_PREDICTION_AMOUNT, MinimumZero(mPanGestureMinPredictionAmount));
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_MAX_PREDICTION_AMOUNT,
+                                  [&](int maxPredictionAmount) {
+                                    if(mPanGestureMinPredictionAmount > -1 && maxPredictionAmount < mPanGestureMinPredictionAmount)
+                                    {
+                                      // maximum amount should not be smaller than minimum amount
+                                      maxPredictionAmount = mPanGestureMinPredictionAmount;
+                                    }
+                                    mPanGestureMaxPredictionAmount = maxPredictionAmount;
+                                  });
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_PREDICTION_AMOUNT_ADJUSTMENT, MinimumZero(mPanGesturePredictionAmountAdjustment));
+  SetFromEnvironmentVariable(DALI_ENV_PAN_SMOOTHING_MODE, mPanGestureSmoothingMode);
+  SetFromEnvironmentVariable<float>(DALI_ENV_PAN_SMOOTHING_AMOUNT, ClampBetweenZeroAndOne(mPanGestureSmoothingAmount));
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_USE_ACTUAL_TIMES, EnableIfNonZero(mPanGestureUseActualTimes));
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_INTERPOLATION_TIME_RANGE, MinimumZero(mPanGestureInterpolationTimeRange));
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_SCALAR_ONLY_PREDICTION_ENABLED, EnableIfNonZero(mPanGestureScalarOnlyPredictionEnabled));
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_TWO_POINT_PREDICTION_ENABLED, EnableIfNonZero(mPanGestureTwoPointPredictionEnabled));
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_TWO_POINT_PAST_INTERPOLATE_TIME, MinimumZero(mPanGestureTwoPointInterpolatePastTime));
+  SetFromEnvironmentVariable<float>(DALI_ENV_PAN_TWO_POINT_VELOCITY_BIAS, ClampBetweenZeroAndOne(mPanGestureTwoPointVelocityBias));
+  SetFromEnvironmentVariable<float>(DALI_ENV_PAN_TWO_POINT_ACCELERATION_BIAS, ClampBetweenZeroAndOne(mPanGestureTwoPointAccelerationBias));
+  SetFromEnvironmentVariable<int>(DALI_ENV_PAN_MULTITAP_SMOOTHING_RANGE, MinimumZero(mPanGestureMultitapSmoothingRange));
+  SetFromEnvironmentVariable(DALI_ENV_PAN_MINIMUM_DISTANCE, mPanMinimumDistance);
+  SetFromEnvironmentVariable(DALI_ENV_PAN_MINIMUM_EVENTS, mPanMinimumEvents);
+
+  SetFromEnvironmentVariable(DALI_ENV_PINCH_MINIMUM_DISTANCE, mPinchMinimumDistance);
+  SetFromEnvironmentVariable(DALI_ENV_PINCH_MINIMUM_TOUCH_EVENTS, mPinchMinimumTouchEvents);
+  SetFromEnvironmentVariable(DALI_ENV_PINCH_MINIMUM_TOUCH_EVENTS_AFTER_START, mPinchMinimumTouchEventsAfterStart);
+
+  SetFromEnvironmentVariable(DALI_ENV_ROTATION_MINIMUM_TOUCH_EVENTS, mRotationMinimumTouchEvents);
+  SetFromEnvironmentVariable(DALI_ENV_ROTATION_MINIMUM_TOUCH_EVENTS_AFTER_START, mRotationMinimumTouchEventsAfterStart);
+
+  SetFromEnvironmentVariable(DALI_ENV_LONG_PRESS_MINIMUM_HOLDING_TIME, mLongPressMinimumHoldingTime);
+  SetFromEnvironmentVariable(DALI_ENV_TAP_MAXIMUM_ALLOWED_TIME, mTapMaximumAllowedTime);
+
+  SetFromEnvironmentVariable(DALI_GLES_CALL_TIME, mGlesCallTime);
+  SetFromEnvironmentVariable<int>(DALI_GLES_CALL_ACCUMULATE, [&](int glesCallAccumulate) { mGlesCallAccumulate = glesCallAccumulate != 0; });
 
   int windowWidth(0), windowHeight(0);
-  if ( GetIntegerEnvironmentVariable( DALI_WINDOW_WIDTH, windowWidth ) && GetIntegerEnvironmentVariable( DALI_WINDOW_HEIGHT, windowHeight ) )
+  if(GetEnvironmentVariable(DALI_WINDOW_WIDTH, windowWidth) && GetEnvironmentVariable(DALI_WINDOW_HEIGHT, windowHeight))
   {
-    mWindowWidth = windowWidth;
+    mWindowWidth  = windowWidth;
     mWindowHeight = windowHeight;
   }
+  SetFromEnvironmentVariable(DALI_WINDOW_NAME, mWindowName);
+  SetFromEnvironmentVariable(DALI_WINDOW_CLASS_NAME, mWindowClassName);
 
-  const char * windowName = GetCharEnvironmentVariable( DALI_WINDOW_NAME );
-  if ( windowName )
-  {
-    mWindowName = windowName;
-  }
+  SetFromEnvironmentVariable<int>(DALI_THREADING_MODE,
+                                  [&](int threadingMode) {
+                                    switch(threadingMode)
+                                    {
+                                      case ThreadingMode::COMBINED_UPDATE_RENDER:
+                                      {
+                                        mThreadingMode = static_cast<ThreadingMode::Type>(threadingMode);
+                                        break;
+                                      }
+                                    }
+                                  });
 
-  const char * windowClassName = GetCharEnvironmentVariable( DALI_WINDOW_CLASS_NAME );
-  if ( windowClassName )
-  {
-    mWindowClassName = windowClassName;
-  }
+  SetFromEnvironmentVariable<int>(DALI_REFRESH_RATE, GreaterThan(mRenderRefreshRate, 1));
 
-  int threadingMode(0);
-  if ( GetIntegerEnvironmentVariable( DALI_THREADING_MODE, threadingMode ) )
-  {
-    switch( threadingMode )
-    {
-      case ThreadingMode::COMBINED_UPDATE_RENDER:
-      {
-        mThreadingMode = static_cast< ThreadingMode::Type >( threadingMode );
-        break;
-      }
-    }
-  }
+  SetFromEnvironmentVariable(DALI_ENV_MULTI_SAMPLING_LEVEL, mMultiSamplingLevel);
 
-  int renderRefreshRate(0);
-  if ( GetIntegerEnvironmentVariable( DALI_REFRESH_RATE, renderRefreshRate ) )
-  {
-    // Only change it if it's valid
-    if( renderRefreshRate > 1 )
-    {
-      mRenderRefreshRate = renderRefreshRate;
-    }
-  }
+  SetFromEnvironmentVariable<int>(DALI_ENV_MAX_TEXTURE_SIZE, GreaterThan(mMaxTextureSize, 0));
 
-  int multiSamplingLevel( 0 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_MULTI_SAMPLING_LEVEL, multiSamplingLevel ) )
-  {
-    mMultiSamplingLevel = multiSamplingLevel;
-  }
-
-  int maxTextureSize( 0 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_MAX_TEXTURE_SIZE, maxTextureSize ) )
-  {
-    if( maxTextureSize > 0 )
-    {
-      mMaxTextureSize = maxTextureSize;
-    }
-  }
-
-  mRenderToFboInterval = GetIntegerEnvironmentVariable( DALI_RENDER_TO_FBO, 0u );
-
-
-  int depthBufferRequired( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_DISABLE_DEPTH_BUFFER, depthBufferRequired ) )
-  {
-    if( depthBufferRequired > 0 )
-    {
-      mDepthBufferRequired = false;
-      mStencilBufferRequired = false; // Disable stencil buffer as well
-    }
-  }
+  mRenderToFboInterval = GetEnvironmentVariable(DALI_RENDER_TO_FBO, 0u);
 
-  int stencilBufferRequired( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_DISABLE_STENCIL_BUFFER, stencilBufferRequired ) )
-  {
-    if( stencilBufferRequired > 0 )
-    {
-      mStencilBufferRequired = false;
-    }
-  }
+  SetFromEnvironmentVariable<int>(DALI_ENV_DISABLE_DEPTH_BUFFER,
+                                  [&](int depthBufferRequired) {
+                                    if(depthBufferRequired > 0)
+                                    {
+                                      mDepthBufferRequired   = false;
+                                      mStencilBufferRequired = false; // Disable stencil buffer as well
+                                    }
+                                  });
+  SetFromEnvironmentVariable<int>(DALI_ENV_DISABLE_STENCIL_BUFFER, DisableIfNonZero(mStencilBufferRequired));
 
-  int partialUpdateRequired( -1 );
-  if( GetIntegerEnvironmentVariable( DALI_ENV_ENABLE_PARTIAL_UPDATE, partialUpdateRequired ) )
-  {
-    if( partialUpdateRequired > 0 )
-    {
-      mPartialUpdateRequired = true;
-    }
-  }
+  SetFromEnvironmentVariable<int>(DALI_ENV_DISABLE_PARTIAL_UPDATE, DisableIfNonZero(mPartialUpdateRequired));
 }
 
-} // Adaptor
+} // namespace Adaptor
 
-} // Internal
+} // namespace Internal
 
-} // Dali
+} // namespace Dali