Save dxf as pdf result in xref missing

[maxm199]

Hi all, I have an issue trying to save a dxf with xref inside as a pdf.

The dxf is made with ezdxf and the file is just fine, i can see it with several cad programs with the xref and print it too as a pdf from the cad program without any issue.

When I try to convert the dxf to pdf within my code, using either matplotlib or pymupdf the pdf file resulting is missing the xref part, the rest of the drawing prints just fine.

The pymupdf code:

	try:
		dxf_layout = dxf_doc.paperspace(layout_name)
	except KeyError:
		print(f"Layout '{layout_name}' not found")
	else:
		page = layout.Page.from_dxf_layout(dxf_layout)
		settings = layout.Settings(
			fit_page=False,
			scale=dxf_layout.get_plot_unit_scale_factor() * scale,
		)
        backend = pymupdf.PyMuPdfBackend()
        config = Configuration(
            min_dash_length=15,
            background_policy=BackgroundPolicy.WHITE,
            color_policy=ColorPolicy.MONOCHROME_LIGHT_BG,
            lineweight_policy=LineweightPolicy.RELATIVE,
            hatch_policy=ezdxf.addons.drawing.config.HatchPolicy.SHOW_OUTLINE,
        )
        Frontend(RenderContext(dxf_doc), backend, config=config).draw_layout(dxf_layout)
        pdf_bytes = backend.get_pdf_bytes(page, settings=settings)
        out_file.write_bytes(pdf_bytes)

The matplotlib code:

    pdf_dpi = 2400
    config = Configuration(
        lineweight_scaling=0.01,
        pdsize=1,
        pdmode=0,
        line_policy=ezdxf.addons.drawing.config.LinePolicy.ACCURATE,
        min_dash_length=15,
        hatch_policy=ezdxf.addons.drawing.config.HatchPolicy.SHOW_OUTLINE,
        image_policy=ezdxf.addons.drawing.config.ImagePolicy.DISPLAY,
        proxy_graphic_policy=ezdxf.addons.drawing.config.ProxyGraphicPolicy.SHOW
    )
    matplotlib.qsave(layout=dxf_doc.layouts.get(layout_name), filename=pdf_file, dpi=pdf_dpi, backend='pdf', config=config)

Is there any parameter I have to add to matplotlib or pymupdf so they don't skip the xref when they make the pdf?

Thanks in advance.

[mozman]

The drawing add-on does not support XREFs.