The antialias setting can be set for all meters.

Library/Meter.cpp

@@ -61,6 +61,7 @@ CMeter::CMeter(CMeterWindow* meterWindow)
 	m_MeterWindow = NULL;
 	m_SolidAngle = 0.0;
 	m_MeterWindow = meterWindow;
+	m_AntiAlias = false;
 }
 
 /*
@@ -257,6 +258,7 @@ void CMeter::ReadConfig(const WCHAR* section)
 
 	m_UpdateDivider = parser.ReadInt(section, L"UpdateDivider", 1);
 	m_UpdateCounter = m_UpdateDivider;
+	m_AntiAlias = 0!=parser.ReadInt(section, L"AntiAlias", 0);
 
 	std::vector<Gdiplus::REAL> matrix = parser.ReadFloats(section, L"TransformationMatrix");
 	if (matrix.size() == 6)
@@ -382,6 +384,17 @@ bool CMeter::Draw(Graphics& graphics)
 {
 	if (IsHidden()) return false;
 
+	if (m_AntiAlias)
+	{
+		graphics.SetInterpolationMode(InterpolationModeBicubic);
+		graphics.SetSmoothingMode(SmoothingModeAntiAlias);
+	}
+	else
+	{
+		graphics.SetInterpolationMode(InterpolationModeDefault);
+		graphics.SetSmoothingMode(SmoothingModeNone);
+	}
+
 	if (m_SolidColor.GetA() != 0 || m_SolidColor2.GetA() != 0)
 	{
 		int x = GetX();

Library/Meter.h

@@ -122,6 +122,7 @@ protected:
 	Gdiplus::Color m_SolidColor;
 	Gdiplus::Color m_SolidColor2;
 	Gdiplus::REAL m_SolidAngle;
+	bool m_AntiAlias;								// If true, the line is antialiased
 
 	CMeterWindow* m_MeterWindow;
 };

Library/MeterLine.cpp

@@ -36,7 +36,6 @@ using namespace Gdiplus;
 CMeterLine::CMeterLine(CMeterWindow* meterWindow) : CMeter(meterWindow)
 {
 	m_Autoscale = false;
-	m_AntiAlias = false;
 	m_HorizontalLines = false;
 	m_HorizontalColor = 0;
 	m_CurrentPos = 0;
@@ -122,7 +121,6 @@ void CMeterLine::ReadConfig(const WCHAR* section)
 
 	m_Flip = 0!=parser.ReadInt(section, L"Flip", 0);
 	m_Autoscale = 0!=parser.ReadInt(section, L"AutoScale", 0);
-	m_AntiAlias = 0!=parser.ReadInt(section, L"AntiAlias", 0);
 	m_LineWidth = parser.ReadFloat(section, L"LineWidth", 1.0);
 	m_HorizontalLines = 0!=parser.ReadInt(section, L"HorizontalLines", 0);
 	m_HorizontalColor = parser.ReadColor(section, L"HorizontalColor", Color::Black);			// This is left here for backwards compatibility
@@ -235,12 +233,6 @@ bool CMeterLine::Draw(Graphics& graphics)
 	{
 		maxValue = 1.0;
 	}
-
-	SmoothingMode mode = graphics.GetSmoothingMode();
-	if (m_AntiAlias)
-	{
-		graphics.SetSmoothingMode(SmoothingModeAntiAlias);
-	}
 	
 	int x = GetX();
 	int y = GetY();
@@ -322,11 +314,6 @@ bool CMeterLine::Draw(Graphics& graphics)
 		counter++;
 	}
 
-	if (m_AntiAlias)
-	{
-		graphics.SetSmoothingMode(mode);
-	}
-
 	return true;
 }
 

Library/MeterLine.h

@@ -42,7 +42,6 @@ private:
 	std::vector<double> m_ScaleValues;				// The scale values for the measures
 
 	bool m_Autoscale;								// If true, the meter is automatically adjusted to show all values
-	bool m_AntiAlias;								// If true, the line is antialiased
 	bool m_HorizontalLines;							// If true, horizontal lines will ba drawn on the meter
 	bool m_Flip;
 	double m_LineWidth;

Library/MeterRoundLine.cpp

@@ -36,7 +36,6 @@ using namespace Gdiplus;
 */
 CMeterRoundLine::CMeterRoundLine(CMeterWindow* meterWindow) : CMeter(meterWindow)
 {
-	m_AntiAlias = false;
 	m_LineWidth = 1.0;
 	m_LineLength = 20;
 	m_LineStart = -1.0;
@@ -80,7 +79,6 @@ void CMeterRoundLine::ReadConfig(const WCHAR* section)
 	m_LineStart = parser.ReadFloat(section, L"LineStart", -1.0);
 	m_StartAngle = parser.ReadFloat(section, L"StartAngle", 0.0);
 	m_RotationAngle = parser.ReadFloat(section, L"RotationAngle", 6.2832);
-	m_AntiAlias = 0!=parser.ReadInt(section, L"AntiAlias", 0);
 	m_ValueRemainder = parser.ReadInt(section, L"ValueReminder", 0);		// Typo
 	m_ValueRemainder = parser.ReadInt(section, L"ValueRemainder", m_ValueRemainder);
 	m_LineColor = parser.ReadColor(section, L"LineColor", Color::Black);
@@ -130,12 +128,6 @@ bool CMeterRoundLine::Draw(Graphics& graphics)
 {
 	if(!CMeter::Draw(graphics)) return false;
 
-	SmoothingMode mode = graphics.GetSmoothingMode();
-	if (m_AntiAlias)
-	{
-		graphics.SetSmoothingMode(SmoothingModeAntiAlias);
-	}
-
 	// Calculate the center of for the line
 	int x = GetX();
 	int y = GetY();
@@ -166,9 +158,6 @@ bool CMeterRoundLine::Draw(Graphics& graphics)
 			{
 				lineLength = m_LineLengthShift * m_Value + m_LineLength;
 			}
-
-			
-
 			
 			SolidBrush solidBrush(m_LineColor);
 
@@ -213,10 +202,5 @@ bool CMeterRoundLine::Draw(Graphics& graphics)
 		graphics.DrawLine(&pen, cx, cy, x, y);
 	}
 
-	if (m_AntiAlias)
-	{
-		graphics.SetSmoothingMode(mode);
-	}
-
 	return true;
 }

Library/MeterRoundLine.h

@@ -33,7 +33,6 @@ public:
 	virtual bool Draw(Gdiplus::Graphics& graphics);
 
 private:
-	bool m_AntiAlias;								// If true, the line is antialiased
 	bool m_Solid;
 	double m_LineWidth;
 	double m_LineLength;

Library/MeterString.cpp

@@ -44,7 +44,6 @@ CMeterString::CMeterString(CMeterWindow* meterWindow) : CMeter(meterWindow)
 	m_Scale = 1.0;
 	m_NoDecimals = true;
 	m_Percentual = true;
-	m_AntiAlias = false;
 	m_ClipString = false;
 	m_NumOfDecimals = -1;
 	m_DimensionsDefined = false;
@@ -192,7 +191,6 @@ void CMeterString::ReadConfig(const WCHAR* section)
 	m_Postfix = parser.ReadString(section, L"Postfix", L"");
 	m_Text = parser.ReadString(section, L"Text", L"");
 
-	m_AntiAlias = 0!=parser.ReadInt(section, L"AntiAlias", 0);
 	m_Percentual = 0!=parser.ReadInt(section, L"Percentual", 0);
 	m_AutoScale = 0!=parser.ReadInt(section, L"AutoScale", 0);
 	m_ClipString = 0!=parser.ReadInt(section, L"ClipString", 0);

Library/MeterString.h

@@ -63,7 +63,6 @@ private:
 	double m_Scale;				// Scaling if autoscale is not used
 	bool m_NoDecimals;			// Number of decimals to use
 	bool m_Percentual;			// True, if the value should be given as %
-	bool m_AntiAlias;			// True, the text is antialiased
 	bool m_ClipString;			// True, the text is clipped in borders (adds ellipsis to the end of the string)
 	Gdiplus::Font* m_Font;		// The font
 	Gdiplus::FontFamily* m_FontFamily;		// The font family