private RadialGradientBrush GetRadialGradientBrush(Rect elementBounds,
SvgRadialGradientElement res)
{
double centerX = res.Cx.AnimVal.Value;
double centerY = res.Cy.AnimVal.Value;
double focusX = res.Fx.AnimVal.Value;
double focusY = res.Fy.AnimVal.Value;
double radius = res.R.AnimVal.Value;
GradientStopCollection gradientStops = GetGradientStops(res.Stops);
RadialGradientBrush brush = new RadialGradientBrush(gradientStops);
brush.RadiusX = radius;
brush.RadiusY = radius;
brush.Center = new Point(centerX, centerY);
brush.GradientOrigin = new Point(focusX, focusY);
if (res.SpreadMethod != null)
{
SvgSpreadMethod spreadMethod = (SvgSpreadMethod)res.SpreadMethod.AnimVal;
if (spreadMethod != SvgSpreadMethod.None)
{
brush.SpreadMethod = WpfConvert.ToSpreadMethod(spreadMethod);
}
}
if (res.GradientUnits != null)
{
SvgUnitType mappingMode = (SvgUnitType)res.GradientUnits.AnimVal;
if (mappingMode == SvgUnitType.ObjectBoundingBox)
{
brush.MappingMode = BrushMappingMode.RelativeToBoundingBox;
}
else if (mappingMode == SvgUnitType.UserSpaceOnUse)
{
brush.MappingMode = BrushMappingMode.Absolute;
}
}
MatrixTransform transform = GetTransformMatrix(res);
if (transform != null && !transform.Matrix.IsIdentity)
{
brush.Transform = transform;
}
else
{
}
string colorInterpolation = res.GetPropertyValue("color-interpolation");
if (!String.IsNullOrEmpty(colorInterpolation))
{
if (colorInterpolation == "linearRGB")
{
brush.ColorInterpolationMode = ColorInterpolationMode.SRgbLinearInterpolation;
}
else
{
brush.ColorInterpolationMode = ColorInterpolationMode.ScRgbLinearInterpolation;
}
}
return brush;
}
private PathGradientBrush GetRadialGradientBrush(SvgRadialGradientElement res, RectangleF bounds)
{
float fCenterX = (float)res.Cx.AnimVal.Value;
float fCenterY = (float)res.Cy.AnimVal.Value;
float fFocusX = (float)res.Fx.AnimVal.Value;
float fFocusY = (float)res.Fy.AnimVal.Value;
float fRadius = (float)res.R.AnimVal.Value;
float fEffectiveCX = fCenterX;
float fEffectiveCY = fCenterY;
float fEffectiveFX = fFocusX;
float fEffectiveFY = fFocusY;
float fEffectiveRadiusX = fRadius;
float fEffectiveRadiusY = fRadius;
if (res.GradientUnits.AnimVal.Equals(SvgUnitType.ObjectBoundingBox))
{
fEffectiveCX = bounds.Left + fCenterX * (bounds.Width);
fEffectiveCY = bounds.Top + fCenterY * (bounds.Height);
fEffectiveFX = bounds.Left + fFocusX * (bounds.Width);
fEffectiveFY = bounds.Top + fFocusY * (bounds.Height);
fEffectiveRadiusX = fRadius * bounds.Width;
fEffectiveRadiusY = fRadius * bounds.Height;
}
GraphicsPath gp = new GraphicsPath();
gp.AddEllipse(fEffectiveCX - fEffectiveRadiusX,
fEffectiveCY - fEffectiveRadiusY, 2 * fEffectiveRadiusX, 2 * fEffectiveRadiusY);
PathGradientBrush brush = new PathGradientBrush(gp);
brush.CenterPoint = new PointF(fEffectiveFX, fEffectiveFY);
XmlNodeList stops = res.Stops;
ColorBlend cb = new ColorBlend();
List<Color> adjcolors = new List<Color>();
List<float> adjpositions = new List<float>();
GetColorsAndPositions(stops, adjpositions, adjcolors);
// Need to invert the colors for some bizarre reason
adjcolors.Reverse();
adjpositions.Reverse();
for (int i = 0; i < adjpositions.Count; i++)
{
adjpositions[i] = 1 - adjpositions[i];
}
cb.Colors = adjcolors.ToArray();
cb.Positions = adjpositions.ToArray();
brush.InterpolationColors = cb;
// ISvgTransformable transElm = (ISvgTransformable)res;
// SvgTransformList svgTList = (SvgTransformList)transElm.transform.AnimVal;
// brush.Transform = svgTList.matrix.matrix;
if (res.GetPropertyValue("color-interpolation") == "linearRGB")
{
//GdipSetPathGradientGammaCorrection(brush, true);
}
else
{
//GdipSetPathGradientGammaCorrection(brush, false);
}
/*
* How to do brush.GammaCorrection = true on a PathGradientBrush? / nikgus
* */
return brush;
}