Re: [Visualoberon-win32] Bitmaps

[Stewart G. <sgr...@ip...>]

Tim Teulings wrote:

> > It seems that bitmaps are not implemented in the current version of
> > VO/Win32. I will need them to do double-buffering.
> 
> > If someone has is working on this, let me know. Otherwise, I'll have an
> > attempt at it next week.
> 
> I did implement them and AFAIK I did send the relevant code. Bitmaps
> are working for me as tested with the last tab in XTest
> (VO:WriteFrame.Mod).
> 
> I'm adding the current source code to this message, perhaps the message
> got lost...

OK. I tried the bitmaps and they seem to work. Animation is certainly
smoother.

For me, colours drawn into bitmaps don't come out when copied into a
window.

For example, the attached view comes out black, white, and red when drawn
directly into the window. When drawn via a bitmap it comes out black and
grey (grey is my default background colour). Red seems to be mapped to
grey. I can't see anything obviously wrong with Display.Mod. If noone has
an obvious solution, I'll take a deeper look.

In the example, set UseBitmap in GraphView.Mod to control whether or not a
bitmap is used.

Cheers,
  Stewart