The 1001 questions about vbRichClient5 (2020-07-21)

[The trick]

Qustion 001: The min line width of Cairo.LineTo

I found a problem. The min line width of CC.LineTo is 2 instead of 1, which means I can't use CC.LineTo to draw a line with a line-width of 1. Did I miss something?

That's because cairo coordinates are centered on the pixels boundaries. To solve the issue just add 0.5 to each coordinate like:

x = 50.5: y = 50.5