[vdr] Re: fonts

[Alessio Sangalli <alesan@manoweb.com>]

Klaus Schmidinger wrote:

> Actually the large center part of the OSD has 2 bpp.

mh... I didn't explained well.

How many colors are avaiable at a time on a OSD page? let's call this n, 
and I think to understand we have n=4 (2bpp).

Now each character is coded in a bitmap that can contain 1 or 0: if it's 
0 the background color will be used, if it's 1 the foreground. We can 
choose bkg and frg from those n (4) colors.

To have antialiasing for the fonts we should have few different degrees 
of the foreground color when we render a character; for subpixel 
rendering we should have direct access to each rgb component of the pixel.


> OSD memory is ************EXTREMELY************** limited.
> You won't be able to use a decent sized OSD with even 4bpp.

mh...
in another post you say they only put 2MB (so much? is it perhaps Mbits? 
2MB would be enough to have a 800x600 true color display) on the board. 
Is there a DVB-board hacker that can find out if we can change the 
memory modules to relase the full potential of the board?



bye
as