public SvgClipPathMaskWriterVisitor(PageWriter writer, SvgMatrix rootTransform, PdfSpotColor spotColorOverride)
{
_spotColorOverride = spotColorOverride;
_writer = writer ?? throw new ArgumentNullException(nameof(writer));
_matrixStack.Push(SvgMatrix.Identity);
PushMatrix(rootTransform);
}
public Visitor(VectorElementPdfPageViewport pageViewport, SvgGraphicsElement element, float pageHeight, PdfSpotColor spotColorOverride)
{
_spotColorOverride = spotColorOverride;
_pageViewport = pageViewport ?? throw new ArgumentNullException(nameof(pageViewport));
_element = element ?? throw new ArgumentNullException(nameof(element));
_pageHeight = pageHeight;
}
public static PdfColor ToPdfColor(this SvgColor color, PdfSpotColor spotColorOverride)
{
if (spotColorOverride != null)
{
return(spotColorOverride);
}
return(new PdfRgbColor(color.R, color.G, color.B));
}
private static GradientColorStop ConvertStop(SvgGradientPaintServerColorStop stop, PdfSpotColor spotColorOverride)
{
if (Math.Abs(stop.Opacity - 1) > float.Epsilon)
{
throw new NotSupportedException($"Gradient stop opacity is not supported, only supports value of 1 but got {stop.Opacity}");
}
return(new GradientColorStop(stop.Color.ToPdfColor(spotColorOverride), stop.Offset));
}
private static IReadOnlyCollection <GradientColorStop> ConvertStops(IEnumerable <SvgGradientPaintServerColorStop> stops, PdfSpotColor spotColorInk)
{
var result = stops.Select(s => ConvertStop(s, spotColorInk)).ToList();
if (result.Count > 1)
{
var lastStop = result[result.Count - 1];
if (lastStop.Offset < 1)
{
result.Add(new GradientColorStop(lastStop.Color, lastStop.Offset + 0.0001001f));
}
}
return(result);
}
public static Color ConvertToColor(SvgPaintServer paintServer, VectorElementPdfPageViewport pageViewport, float pageHeight, SvgGraphicsElement element, PdfSpotColor spotColorInk) => paintServer?.Accept(new Visitor(pageViewport, element, pageHeight, spotColorInk));
private static bool CheckInvalidGradientPaintServer(SvgGradientPaintServer paintServer, PdfSpotColor spotColorInk, out Color color)
{
color = null;
switch (paintServer.Stops.Count)
{
case 0:
return(true);
case 1:
color = paintServer.Stops[0].Color.ToPdfColor(spotColorInk);
return(true);
}
return(false);
}