public void SetRadialGradientPaint(APaint platformPaint, RadialGradientPaint radialGradientPaint)
{
var center = radialGradientPaint.Center;
float centerX = (float)center.X;
float centerY = (float)center.Y;
float radius = (float)radialGradientPaint.Radius;
var gradientData = GetGradientPaintData(radialGradientPaint);
var radialGradientData = new RadialGradientData(gradientData.Colors, gradientData.Offsets, centerX, centerY, radius);
if (_width == 0 && _height == 0)
{
return;
}
if (radialGradientData.Colors == null || radialGradientData.Colors.Length < 2)
{
return;
}
var radialGradient = new RadialGradient(
_width * radialGradientData.CenterX,
_height * radialGradientData.CenterY,
Math.Max(_height, _width) * radialGradientData.Radius,
radialGradientData.Colors,
radialGradientData.Offsets,
Shader.TileMode.Clamp !);
platformPaint.SetShader(radialGradient);
}
public void SetPaint(RadialGradientPaint radialGradientPaint)
{
var center = radialGradientPaint.Center;
float centerX = (float)center.X;
float centerY = (float)center.Y;
float radius = (float)radialGradientPaint.Radius;
var data = GetGradientPaintData(radialGradientPaint);
var shader = new RadialGradientData(data.Colors, data.Offsets, centerX, centerY, radius);
_backgroundColor = null;
SetShaderFactory(new RadialGradientShaderFactory(shader));
}
internal static RadialGradientShaderFactory GetRadialGradientShaderFactory(RadialGradientPaint radialGradientPaint, float alpha = 1.0f)
{
var center = radialGradientPaint.Center;
float centerX = (float)center.X;
float centerY = (float)center.Y;
float radius = (float)radialGradientPaint.Radius;
var data = GetGradientPaintData(radialGradientPaint, alpha);
var shader = new RadialGradientData(data.Colors, data.Offsets, centerX, centerY, radius);
var radialGradientShaderFactory = new RadialGradientShaderFactory(shader);
return radialGradientShaderFactory;
}
internal static RadialGradientShaderFactory GetRadialGradientShaderFactory(RadialGradientPaint radialGradientPaint)
{
var center = radialGradientPaint.Center;
float centerX = (float)center.X;
float centerY = (float)center.Y;
float radius = (float)radialGradientPaint.Radius;
var data = PaintExtensions.GetGradientPaintData(radialGradientPaint);
var shader = new RadialGradientData(data.Colors, data.Offsets, centerX, centerY, radius);
var radialGradientShaderFactory = new RadialGradientShaderFactory(shader);
return(radialGradientShaderFactory);
}
public RadialGradientShaderFactory(RadialGradientData data)
{
_data = data;
}