changed rounding behavior of float to int color conversion from floor() to round().

This is huge especially for the low values because human eyes distinguish darker colors much better.

Source/Painting/SvgColourConverter.cs

@@ -63,20 +63,20 @@ namespace Svg
 
                                 if (alphaDecimal <= 1)
                                 {
-                                    alphaValue = (int)(alphaDecimal * 255);
+                                    alphaValue = (int)Math.Round(alphaDecimal * 255);
                                 }
                                 else
                                 {
-                                    alphaValue = (int)alphaDecimal;
+                                    alphaValue = (int)Math.Round(alphaDecimal);
                                 }
                             }
 
                             Color colorpart;
                             if (values[0].Trim().EndsWith("%"))
                             {
-                                colorpart = System.Drawing.Color.FromArgb(alphaValue, (int)(255 * float.Parse(values[0].Trim().TrimEnd('%')) / 100f),
-                                                                                      (int)(255 * float.Parse(values[1].Trim().TrimEnd('%')) / 100f),
-                                                                                      (int)(255 * float.Parse(values[2].Trim().TrimEnd('%')) / 100f));
+                                colorpart = System.Drawing.Color.FromArgb(alphaValue, (int)Math.Round(255 * float.Parse(values[0].Trim().TrimEnd('%')) / 100f),
+                                                                                      (int)Math.Round(255 * float.Parse(values[1].Trim().TrimEnd('%')) / 100f),
+                                                                                      (int)Math.Round(255 * float.Parse(values[2].Trim().TrimEnd('%')) / 100f));
                             }
                             else
                             {
@@ -260,7 +260,7 @@ namespace Svg
                               break;
                   }
             }
-            Color rgb = Color.FromArgb( (int)( r * 255.0 ), (int)( g * 255.0 ), (int)( b * 255.0f ) );
+            Color rgb = Color.FromArgb( (int)Math.Round( r * 255.0 ), (int)Math.Round( g * 255.0 ), (int)Math.Round( b * 255.0 ) );
             return rgb;        
         }
 

Source/Painting/SvgColourServer.cs

@@ -40,7 +40,7 @@ namespace Svg
             //is none?
             if (this == SvgPaintServer.None) return new SolidBrush(System.Drawing.Color.Transparent);
                 
-            int alpha = (int)((opacity * (this.Colour.A/255.0f) ) * 255);
+            int alpha = (int)Math.Round((opacity * (this.Colour.A/255.0) ) * 255);
             Color colour = System.Drawing.Color.FromArgb(alpha, this.Colour);
 
             return new SolidBrush(colour);

Source/Painting/SvgGradientServer.cs

@@ -185,7 +185,7 @@ namespace Svg
                     radial
                     ? 1 - (currentStop.Offset.ToDeviceValue(renderer, UnitRenderingType.Horizontal, this) / boundWidth)
                     : (currentStop.Offset.ToDeviceValue(renderer, UnitRenderingType.Horizontal, this) / boundWidth);
-                colour = System.Drawing.Color.FromArgb((int)(mergedOpacity * 255), currentStop.GetColor(this));
+                colour = System.Drawing.Color.FromArgb((int)Math.Round(mergedOpacity * 255), currentStop.GetColor(this));
 
                 actualStops++;
 

Source/Painting/SvgLinearGradientServer.cs

@@ -87,7 +87,7 @@ namespace Svg
             if (this.Stops.Count == 1) 
             {
                 var stopColor = this.Stops[0].GetColor(renderingElement); 
-                int alpha = (int)((opacity * (stopColor.A/255.0f) ) * 255);
+                int alpha = (int)Math.Round((opacity * (stopColor.A/255.0f) ) * 255);
                 Color colour = System.Drawing.Color.FromArgb(alpha, stopColor);
                 return new SolidBrush(colour);
             }

Source/Painting/SvgRadialGradientServer.cs

@@ -147,7 +147,7 @@ namespace Svg
                 {
                     var stop = Stops.Last();
                     var origColor = stop.GetColor(renderingElement);
-                    var renderColor = System.Drawing.Color.FromArgb((int)(opacity * stop.Opacity * 255), origColor);
+                    var renderColor = System.Drawing.Color.FromArgb((int)Math.Round(opacity * stop.Opacity * 255), origColor);
 
                     var origClip = renderer.GetClip();
                     try