On Tue, 30 Nov 2021, 13:54 Albrecht Schlosser wrote:

On 11/30/21 1:33 PM 'Mark' via fltk.general wrote:
> Does FLTK 1.4 support drawing gradients? If so, can someone give me
> the link to the docs please?

There's no builtin gradient support (yet).

It is possible that this will be added in the future because drawing
gradients line by line (as it is done now where gradients are used)
suffers from alignment issues with different zoom factors.

That said, you can see an example in the "gleam" scheme:
https://github.com/fltk/fltk/blob/master/src/fl_gleam.cxx

Depending on what effect you are looking to achieve, it's probably also worth looking at the fltk SVG mechanism as that can draw fairly nice gradients too.

Or something using a fltk GL surface, I suppose.

Or (being deliberately obtuse!) I suppose, since you can draw individual pixels in a fltk draw method, you can "just" colour in the gradient "by hand"...

But there's no "built-in" fltk gradient mechanism...

--
Ian
From my Fairphone FP3