public GdiRadialGradientBrush(
PointF center,
float xRadius,
float yRadius,
GradientStop[] gradientStops)
{
this.gradientStops = gradientStops;
this.graphicsPath = new GraphicsPath();
RectangleF rect = new RectangleF(new PointF(center.X - xRadius, center.Y - yRadius), new SizeF(xRadius * 2f, yRadius * 2f));
if (!rect.IsEmpty)
{
this.graphicsPath.AddEllipse(rect);
this.brush = (Brush) new PathGradientBrush(this.graphicsPath)
{
CenterPoint = center,
CenterColor = gradientStops[0].Color,
InterpolationColors = GdiUtility.GetColorBlend(gradientStops)
};
}
else
{
this.brush = (Brush) new SolidBrush(Color.Transparent);
}
}
public void SetGradientStops(GradientStop[] gradientStops)
{
if (gradientStops == null || gradientStops.Length == 0)
{
throw new ArgumentException(nameof(gradientStops));
}
this.gradientStops = gradientStops;
this.rawBrush.InterpolationColors = GdiUtility.GetColorBlend(gradientStops);
}
public GdiLinearGradientBrush(RectangleF rectangle, GradientStop[] gradientStops, float angle)
{
this.angle = angle;
this.mode = RadLinearGradientMode.None;
this.gradientStops = gradientStops;
rectangle.Width = Math.Max(1f, rectangle.Width);
rectangle.Height = Math.Max(1f, rectangle.Height);
this.rawBrush = new LinearGradientBrush(rectangle, Color.Black, Color.Black, angle);
this.rawBrush.WrapMode = WrapMode.TileFlipXY;
this.rawBrush.InterpolationColors = GdiUtility.GetColorBlend(gradientStops);
}
public void SetGradientStops(GradientStop[] gradientStops)
{
if (gradientStops == null || gradientStops.Length == 0)
{
throw new ArgumentException(nameof(gradientStops));
}
this.gradientStops = gradientStops;
PathGradientBrush brush = this.brush as PathGradientBrush;
if (brush == null)
{
return;
}
brush.CenterColor = gradientStops[0].Color;
brush.InterpolationColors = GdiUtility.GetColorBlend(gradientStops);
}
public GdiLinearGradientBrush(
RectangleF rectangle,
GradientStop[] gradientStops,
RadLinearGradientMode mode)
{
if (mode == RadLinearGradientMode.None)
{
throw new NotSupportedException("The brush cannot be initialized with " + (object)mode);
}
this.mode = mode;
this.angle = 0.0f;
this.gradientStops = gradientStops;
rectangle.Width = Math.Max(1f, rectangle.Width);
rectangle.Height = Math.Max(1f, rectangle.Height);
this.rawBrush = new LinearGradientBrush(rectangle, Color.Black, Color.Black, (LinearGradientMode)this.mode);
LinearGradientBrush rawBrush = this.rawBrush;
GradientStop[] gradientStops1;
if (gradientStops.Length == 1)
{
gradientStops1 = new GradientStop[2]
{
new GradientStop(gradientStops[0].Color, 0.0f),
new GradientStop(gradientStops[0].Color, 1f)
}
}
;
else
{
gradientStops1 = gradientStops;
}
ColorBlend colorBlend = GdiUtility.GetColorBlend(gradientStops1);
rawBrush.InterpolationColors = colorBlend;
this.rawBrush.WrapMode = WrapMode.TileFlipXY;
}
