mfek / glifrenderer.rlib Goto Github PK

Drawing TT2020 glyphs is possible, but renders on my machine at only around 15FPS. Not as bad as FontForge's 0.33FPS, but not ideal.

I think it's mostly due to how many paths we're creating. (perf backs this theory up if I'm reading it right.) I think I can solve this with a little good old fashioned indirection, by drawing every point that will be the same color/stroke width in a single path.

15 FPS:

60+ FPS:

(Also, we probably shouldn't draw selected points twice, but this isn't as big a problem as creating thousands of Paths/Paints.)

Rust iterators should make this easier. Basically the current draw_point will just add a rect/triangle/circle to a one-per-render_frame struct, then we'll draw all the points with only four or five Paths/Paints.

This might be post-1.0 as it's premature optimization, but am writing it down so don't forget.

In @eliheuer's exposition of MFEK/glif#235 he linked a cool image

I assume this is a heavily stylized Runebender (if so, good news for me, for MFEKglif is finally handily beating them in tool count, meaning we are rapidly closing the feature gap and will soon, (once we have a font overview in the form of MFEKufo) be able to declare MFEK does everything Runebender can).

So, this issue is just one of Runebender competition, we need that preview widget thing. It's also a cool feature, besides my competitive spirit, hehe.