VDR's OSD uses anti-aliasing for smoothly rendering its fonts. The same could be used to make rendering ellipses look nicer. Is there anybody who might be able to figure out how

cBitmap::DrawEllipse() cPixmapMemory::DrawEllipse()

and maybe also

cBitmap::DrawSlope() cPixmapMemory::DrawSlope()

could be modified in order to do anti-aliasing and thus make the drawings smoother?

I'm pretty sure at some point along the calculations in these functions there is enough information available to determine a value in the range 0..255 that could be used to generate a shade of foreground/background color that can be used to set intermediate pixels. Of course this would require these functions to be given both fg and bg colors, but we'll cross that bridge when we get there. For starters just assume that both colors will be available.

I would appreciate any help on this topic. If you have any suggestions, please post them here, to avoid duplicate work.

Klaus