On 24 Feb 2021, at 17:59, Manolo wrote:
>
> The possibility to draw using an unscaled context is already present in FLTK 1.4.
> The key is to call Fl_Graphics_Driver::scale(float s) to change the scaling factor
> and set it to 1. I attach a small example program that redraws a button label
> using an unscaled setting. The result is that lines have a constant width, set to 1, 2 and 3
> with growing scale factor values.

Neat, didn’t know that worked.

Can you change the scale factor during a draw() method? I wonder if you could use this technique to, for example, have the text scale “normally” with the DPI, but force lines always to be scale 1.0, or etc...?