On 11.03.2008, at 22:15, Evan Laforge wrote: > In line with the recent discussion about "modernising" fltk to do > things like transparency, what's the current best way to go about > drawing a translucent rectangle?
What you are doing is currently the only way, unless you go with OpenGL. FLTK positions itself very low in graphics interface and does not use any system-provided transparency functions (yet). > Can I call the OS-level drawing functions directly? Yes, you can do that. Everything you need should be in the docs under system-specific calls. Basically, we use fl_gc to hold the graphics context in an OS dependent way. > I'm also interested in anti-aliased lines, curves, and shapes. If you are on OS X and configure FLTK with --enable-quartz, you already have antialiased line drawing. > Anyone else dealt with these issues in fltk and came up with a nice > solution? I'm hoping a cross platform rectf with alpha wouldn't be > too hard to write, as well as anti-aliased versions of the various > line drawing primitives. In a world with alpha channel, there is no big difference between drawing a rectangle and drawing an image. It has to be composited in a pixl-by-pixel manner anyways. We will look into this eventually, but it does not hae priority right now. If you would like to contribute (at this point, we would still need an API), you are very welcome. Matthias ---- http://robowerk.com/ _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
