I’ve started writing a very simple stylus ‘scribble’ program in C. It works. However, from on-line searches I learn that gtk + Cairo can’t produce continuous freehand lines without the program providing interpolation. This is a drag. I have searched for “gtk interpolated freehand drawing” and have…

[image] CliveMCarthy: It seems switching off event compression is nearly as good as performing interpolation. GTK3 allows app developers to disable event compression as a backward compatibility compromise. GTK4 does not allow you to do that; if you want more events, you will need to get the …

I should add that my work in on Linux with Xorg, of course. For my non-GUI graphics work I use OpenGL and write simple shaders. The platform is an i7-1165G7 which has a decent (for my purposes) integrated GPU. I only use GTK when I need a real user GUI. Even then, the simple GUIs I write are hand …

Pray tell what harm does disabling event compression do ? If it is benign why disable it ? Too late to ask that question, I guess. If one wants a simple disk drawn one has to use the Cairo primitive cairo_arc. Including starting and ending angles and then has to fill the dot as a separate call. Th…

[image] CliveMCarthy: Pray tell what harm does disabling event compression do ? If it is benign why disable it ? Too late to ask that question, I guess. The “tl;dr” answer is: the more events GTK needs to dispatch to client code, the less time is available in the frame budget. Dispatching si…

I have a quick reply here to show that event compression does do something. Well, I can remember a discussion maybe 8 years ago, in early GTK3 days, when disabling compression made no difference for some people, including me. If you should depend on disabling compression, you may ensure that it w…

Users ? I write for myself ! :wink: What I’m currently writing has one user and is on one platform. I started using GTK a while back when I wanted to make it possible for an artist collaborator to be able to use some software I had written that had NO user interface – not even a command line. To ch…

[image] CliveMCarthy: It still seems odd that GTK would drop disabling compression when it is already off by default. That’s the opposite of what is happening: GTK3 enables event compression by default, but allows you to disable it for legacy reasons. GTK4 always performs compression for moti…

Yes, I understand that. It just doesn’t make sense to take a facility away that is off by default and isn’t getting in anyone’s way. Consequently weirdos, like me, that find it useful, now cannot choose to override it. More choices are usually better, if they don’t get in anybody’s way and don’t slo…

[image] CliveMCarthy: It just doesn’t make sense to take a facility away that is off by default and isn’t getting in anyone’s way. Consequently weirdos, like me, that find it useful, now cannot choose to override it. More choices are usually better, if they don’t get in anybody’s way and don’t s…

[image] CliveMCarthy: Oh, and when I go look for the history stuff I find: https://gitlab.gnome.org/GNOME/gtk/-/issues/4809 not very encouraging. If you expect GTK to not have bugs, you’ll be sorely disappointed. :wink: That particular issue has been fixed 3 months ago.

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