public PdfFile Convert(DxfFile source, DxfToPdfConverterOptions options)
{
// adapted from https://github.com/ixmilia/bcad/blob/master/src/IxMilia.BCad.FileHandlers/Plotting/Pdf/PdfPlotter.cs
CreateTransformations(source.ActiveViewPort, options, out Matrix4 scale, out Matrix4 affine);
var pdf = new PdfFile();
var page = new PdfPage(options.PageWidth, options.PageHeight);
pdf.Pages.Add(page);
var builder = new PdfPathBuilder();
void AddPathItemToPage(IPdfPathItem pathItem)
{
builder.Add(pathItem);
}
//void AddStreamItemToPage(PdfStreamItem streamItem)
//{
// if (builder.Items.Count > 0)
// {
// page.Items.Add(builder.ToPath());
// builder = new PdfPathBuilder();
// }
// page.Items.Add(streamItem);
//}
foreach (var layer in source.Layers)
{
foreach (var entity in source.Entities.Where(e => e.Layer == layer.Name))
{
TryConvertEntity(entity, layer, affine, scale, builder, page);
// if that failed, emit some diagnostic hint? Callback?
}
}
if (builder.Items.Count > 0)
{
page.Items.Add(builder.ToPath());
}
return(pdf);
}
public override void Plot(IWorkspace workspace)
{
var file = new PdfFile();
var font = new PdfFontType1(PdfFontType1Type.Helvetica);
foreach (var pageViewModel in ViewModel.Pages)
{
var projectedEntities = ProjectionHelper.ProjectTo2D(
workspace.Drawing,
pageViewModel.ViewPort,
pageViewModel.ViewWidth,
pageViewModel.ViewHeight,
ProjectionStyle.OriginBottomLeft);
var page = new PdfPage(
new PdfMeasurement(pageViewModel.ViewWidth, PdfMeasurementType.Inch),
new PdfMeasurement(pageViewModel.ViewHeight, PdfMeasurementType.Inch));
file.Pages.Add(page);
var builder = new PdfPathBuilder();
void AddPathItemToPage(IPdfPathItem pathItem)
{
builder.Add(pathItem);
}
void AddStreamItemToPage(PdfStreamItem streamItem)
{
if (builder.Items.Count > 0)
{
page.Items.Add(builder.ToPath());
builder = new PdfPathBuilder();
}
page.Items.Add(streamItem);
}
foreach (var group in projectedEntities.GroupBy(e => e.OriginalLayer).OrderBy(l => l.Key.Name))
{
var layer = group.Key;
foreach (var entity in group)
{
var scale = 1.0;
switch (entity.Kind)
{
case EntityKind.Arc:
var arc = (ProjectedArc)entity;
scale = arc.RadiusX / arc.OriginalArc.Radius;
AddPathItemToPage(new PdfArc(
arc.Center.ToPdfPoint(PdfMeasurementType.Inch),
new PdfMeasurement(arc.RadiusX, PdfMeasurementType.Inch),
arc.StartAngle * MathHelper.DegreesToRadians,
arc.EndAngle * MathHelper.DegreesToRadians,
state: new PdfStreamState(
strokeColor: (arc.OriginalArc.Color ?? layer.Color ?? AutoColor).ToPdfColor(),
strokeWidth: new PdfMeasurement(ApplyScaleToThickness(arc.OriginalArc.Thickness, scale), PdfMeasurementType.Inch))));
break;
case EntityKind.Circle:
var circle = (ProjectedCircle)entity;
scale = circle.RadiusX / circle.OriginalCircle.Radius;
AddPathItemToPage(new PdfCircle(
circle.Center.ToPdfPoint(PdfMeasurementType.Inch),
new PdfMeasurement(circle.RadiusX, PdfMeasurementType.Inch),
state: new PdfStreamState(
strokeColor: (circle.OriginalCircle.Color ?? layer.Color ?? AutoColor).ToPdfColor(),
strokeWidth: new PdfMeasurement(ApplyScaleToThickness(circle.OriginalCircle.Thickness, scale), PdfMeasurementType.Inch))));
break;
case EntityKind.Line:
var line = (ProjectedLine)entity;
scale = (line.P2 - line.P1).Length / (line.OriginalLine.P2 - line.OriginalLine.P1).Length;
AddPathItemToPage(new PdfLine(
line.P1.ToPdfPoint(PdfMeasurementType.Inch),
line.P2.ToPdfPoint(PdfMeasurementType.Inch),
state: new PdfStreamState(
strokeColor: (line.OriginalLine.Color ?? layer.Color ?? AutoColor).ToPdfColor(),
strokeWidth: new PdfMeasurement(ApplyScaleToThickness(line.OriginalLine.Thickness, scale), PdfMeasurementType.Inch))));
break;
case EntityKind.Text:
var text = (ProjectedText)entity;
AddStreamItemToPage(
new PdfText(
text.OriginalText.Value,
font,
new PdfMeasurement(text.Height, PdfMeasurementType.Inch),
text.Location.ToPdfPoint(PdfMeasurementType.Inch),
state: new PdfStreamState(
nonStrokeColor: (text.OriginalText.Color ?? layer.Color ?? AutoColor).ToPdfColor())));
break;
default:
// TODO:
break;
}
}
}
if (builder.Items.Count > 0)
{
page.Items.Add(builder.ToPath());
}
}
file.Save(ViewModel.Stream);
}