Re: [Linux-fbdev-devel] Supporting various depth

[Geert U. <ge...@li...>]

On Wed, 13 Jun 2001, Romain Dolbeau wrote:
> Is there a way to distinguish 15 and 16 bpp in 16bits pixels in
> the fbdev/fbcon layer ?

Yes, by looking at the fb_var_screeninfo.{red,green,blue}.length fields.

> pm3fb support RGB565 in 16bpp, and I was just asked for 15bpp
> (RGB555 + 1 bit Alpha or whatever). Do I simply reuse CFB16
> and support both internally, is there a requirement that
> CFB16 is one or the other, ... ?

Cfb16 is the memory organization: packed 16 bits per pixel. How a pixel looks
like internally doesn't matter. So both RGB555 and RGB565 use fbcon-cfb16.c.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@li...

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds