public static Gdi.Brush ToGdi(this IBrush brush, Position pos1, Position pos2)
{
Gdi.Brush gdiBrush = brush switch
{
SolidBrush solidBrush => new Gdi.SolidBrush(solidBrush.Color.ToGdi()),
GradientBrush gradienBrush => new Gdi.Drawing2D.LinearGradientBrush(pos1.ToGdi(), pos2.ToGdi(), gradienBrush.Color1.ToGdi(), gradienBrush.Color2.ToGdi()),
_ => throw new NotImplementedException($"Brush of type {brush.GetType().Name} not implemented"),
};
return(gdiBrush);
}
private static void InitSkiaPaintForBrush(SKPaint paint, IBrush brush, IUIElement uiElement)
{
if (brush is ISolidColorBrush solidColorBrush)
{
paint.Color = ToSkiaColor(solidColorBrush.Color);
}
else if (brush is IGradientBrush gradientBrush)
{
paint.Shader = ToSkiaShader(gradientBrush, uiElement);
}
else
{
throw new InvalidOperationException($"Brush type {brush.GetType()} isn't currently supported");
}
}
/// <summary>
/// Verifies if the given brush is the same as the otherBrush.
/// </summary>
/// <param name="brush">Brush</param>
/// <param name="otherBrush">Brush</param>
/// <returns>true if yes, otherwise false</returns>
public static bool IsEqualTo(this IBrush brush, IBrush otherBrush)
{
if (brush.GetType() != otherBrush.GetType())
{
return(false);
}
if (ReferenceEquals(brush, otherBrush))
{
return(true);
}
// Are both instances of SolidColorBrush
var solidBrushA = brush as SolidColorBrush;
var solidBrushB = otherBrush as SolidColorBrush;
if ((solidBrushA != null) && (solidBrushB != null))
{
return((solidBrushA.Color.Equals(solidBrushB.Color)) &&
solidBrushA.Opacity.IsCloseTo(solidBrushB.Opacity));
}
// Are both instances of LinearGradientBrush
var linGradBrushA = brush as LinearGradientBrush;
var linGradBrushB = otherBrush as LinearGradientBrush;
if ((linGradBrushA != null) && (linGradBrushB != null))
{
var result = //(linGradBrushA.ColorInterpolationMode == linGradBrushB.ColorInterpolationMode)
// &&
(linGradBrushA.EndPoint == linGradBrushB.EndPoint)
//&& (linGradBrushA.MappingMode == linGradBrushB.MappingMode)
&& linGradBrushA.Opacity.IsCloseTo(linGradBrushB.Opacity) &&
(linGradBrushA.StartPoint == linGradBrushB.StartPoint) &&
(linGradBrushA.SpreadMethod == linGradBrushB.SpreadMethod) &&
(linGradBrushA.GradientStops.Count == linGradBrushB.GradientStops.Count);
if (!result)
{
return(false);
}
for (var i = 0; i < linGradBrushA.GradientStops.Count; i++)
{
result = (linGradBrushA.GradientStops[i].Color.Equals(linGradBrushB.GradientStops[i].Color)) &&
linGradBrushA.GradientStops[i].Offset.IsCloseTo(linGradBrushB.GradientStops[i].Offset);
if (!result)
{
break;
}
}
return(result);
}
// Are both instances of RadialGradientBrush
var radGradBrushA = brush as RadialGradientBrush;
var radGradBrushB = otherBrush as RadialGradientBrush;
if ((radGradBrushA != null) && (radGradBrushB != null))
{
var result = //(radGradBrushA.ColorInterpolationMode == radGradBrushB.ColorInterpolationMode)
//&&
(radGradBrushA.GradientOrigin == radGradBrushB.GradientOrigin)
//&& (radGradBrushA.MappingMode == radGradBrushB.MappingMode)
&& radGradBrushA.Opacity.IsCloseTo(radGradBrushB.Opacity)
//&& radGradBrushA.RadiusX.IsCloseTo(radGradBrushB.RadiusX)
//&& radGradBrushA.RadiusY.IsCloseTo(radGradBrushB.RadiusY)
&& (radGradBrushA.SpreadMethod == radGradBrushB.SpreadMethod) &&
(radGradBrushA.GradientStops.Count == radGradBrushB.GradientStops.Count);
if (!result)
{
return(false);
}
for (var i = 0; i < radGradBrushA.GradientStops.Count; i++)
{
result = (radGradBrushA.GradientStops[i].Color.Equals(radGradBrushB.GradientStops[i].Color)) &&
radGradBrushA.GradientStops[i].Offset.IsCloseTo(radGradBrushB.GradientStops[i].Offset);
if (!result)
{
break;
}
}
return(result);
}
// Are both instances of ImageBrush
var imgBrushA = brush as ImageBrush;
var imgBrushB = otherBrush as ImageBrush;
if ((imgBrushA != null) && (imgBrushB != null))
{
var result = (imgBrushA.AlignmentX == imgBrushB.AlignmentX) &&
(imgBrushA.AlignmentY == imgBrushB.AlignmentY) &&
imgBrushA.Opacity.IsCloseTo(imgBrushB.Opacity) &&
(imgBrushA.Stretch == imgBrushB.Stretch) &&
(imgBrushA.TileMode == imgBrushB.TileMode)
//&& (imgBrushA.Viewbox == imgBrushB.Viewbox)
//&& (imgBrushA.ViewboxUnits == imgBrushB.ViewboxUnits)
//&& (imgBrushA.Viewport == imgBrushB.Viewport)
//&& (imgBrushA.ViewportUnits == imgBrushB.ViewportUnits)
//&& (imgBrushA.ImageSource == imgBrushB.ImageSource)
;
return(result);
}
return(false);
}
public static SKPaint ToSKPaint(this IBrush brush)
{
if (brush is SolidColorBrush solidColorBrush)
{
return(new SKPaint()
{
Color = solidColorBrush.Color.ToSKColor(),
IsAntialias = true,
StrokeWidth = 1
});
}
throw new NotImplementedException($"Unsupported brush type is passed in! Brush type: '{brush.GetType().FullName}'");
}