Re: [PATCH] Hooks for new fbdev api

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

On Wed, 28 Nov 2001, James Simmons wrote:
> > > +struct fbcursor {
> > > +   __u16 set;      /* what to set */
> > > +   __u16 enable;/* cursor on/off */
> > > +   struct fbcurpos pos;/* cursor position */
> > > +   struct fbcurpos hot;/* cursor hot spot */
> > > +   struct fb_cmap cmap;/* color map info */
> > > +   struct fbcurpos size;/* cursor bit map size */
> > > +   char *image;/* cursor image bits */
> > > +   char *mask;/* cursor mask bits */
> > > +};
> > 
> > Any details about contents of image and mask? 
> 
> Depends on what color depth you use for the cursor.
> 
> > Or is it just monochromatic
> > 1bpp image? There is hardware which can do 16color hardware cursors (+
> > transparent+inverse).
> 
> I know. That is why we have a colormap for the cursor. This allows for
> much more for the cursor than a mono color map.
> 
> > And if it is 1bpp image, is it 0/1/transparent/invert (XGA), or 
> > transp./transp./0/1 (X)?
> 
> Should be able to support that as well. I haven't added any flags for
> that. Hm. 

Just add a field to contain the color index for an inverting color (e.g. 3 for
XGA) or -1 if not supported.

For transparency, use the alpha in the cmap.

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