Difference in the rendering of Chinese characters between autocad and "ezdxf view"

[maslke]

Hello everyone, I have a question I'd like to ask.

Regarding a same dxf file, when viewed through AutoCAD software and the "ezdxf view" method, there is a noticeable difference in the rendering of Chinese characters.

Here is a simple demo dfx file. When viewed in AutoCAD software, the effect is as follows. It can be observed that the text does not exceed the outer rectangle.

When viewed using the "ezdxf view" method, the effect is as follows. The rendered text exceeds the rectangle.

What is the cause of this discrepancy, and is there a way to control this behavior?

Thank you all for your suggestions.

123.zip

[maslke]

I hava just found issue #733 and I found this:

All text rendering in ezdxf is done by the Matplotlib package which does not render fonts the same way as AutoCAD or BricsCAD. That's a fact you have to live with.

I want to convert dxf file with Chinese characters to pdf file using drawing addon. Does this process also depends on Matplotlib?

backend = pymupdf.PyMuPdfBackend()
Frontend(RenderContext(doc), backend, config=cfg).draw_layout(dxf_layout)
pdf_bytes = backend.get_pdf_bytes(page, settings=settings)

Is there a way to control this?

[mozman]

Text is rendered by fontTools since version v1.1.0, the result is now closer to AutoCAD than rendered by Matplotlib but will never be perfect.

[maslke]

I noticed another issue, which may be related to ODAFileConverter.
In ezdxf, create a text entity and set the alignment to MIDDLE_LEFT.
After generating the dxf, when converted to dwg file through ODAFileConverter, the alignment of this text will change to BOTTOM_LEFT.