New to cairo, some questions
Simon Lipp <[email protected]>
| Newsgroups | gmane.comp.lib.cairo |
|---|---|
| Message-ID | <20140124175128.26c15cfc@an-arch-ist> |
Hello, I’m trying to learn cairo, and there’s some thinks I don’t quite understand. First, let’s begin with this simple program : https://gist.github.com/anonymous/8600647 It is a simple animation where an arc rotates around the center. Now my questions are : * If I move cairo_create() and cairo_destroy() out of the loop, the result is still the same. However, most cairo examples on the web (like http://en.literateprograms.org/Hello_World_%28C,_Cairo%29) puts these call outside the loop. Why ? What’s the difference ? * Now if I just move cairo_paint() (and the first cairo_set_source_rgba call) outside the loop, I expect the result to be an animation of a circle being drawn. But that’s not what I get : I get no animation at all. Why ? * The same programe using EGL (https://gist.github.com/anonymous/8600771) instead of plain X surface doesn't draw anything. What am I doing wrong ? Cheers -- cairo mailing list [email protected] http://lists.cairographics.org/mailman/listinfo/cairo