public virtual void PaintShading(PdfShading shading)
{
writer.AddSimpleShading(shading);
PageResources prs = PageResources;
PdfName name = prs.AddShading(shading.ShadingName, shading.ShadingReference);
content.Append(name.GetBytes()).Append(" sh").Append_i(separator);
ColorDetails details = shading.ColorDetails;
if (details != null)
prs.AddColor(details.ColorName, details.IndirectReference);
}