Messages in this thread | | | Date | Mon, 14 Oct 2002 10:30:32 +0200 (MEST) | From | Geert Uytterhoeven <> | Subject | Re: [Linux-fbdev-devel] Re: fbdev changes. |
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On Mon, 14 Oct 2002, Petr Vandrovec wrote: > On Sun, Oct 13, 2002 at 01:27:08PM -0700, James Simmons wrote: > > Second change!! We need a uiversal cursor api. I purposed some time ago a > > api but nothing happend.I like to resolve this final part to remove th > > last bit of console crude from the fbdev layer.
[...]
> And what is meaning of image when mask is 1? For b&w cursors > we need 0, 1, transparent and inverse.
Note that not all hardware supports inverse. And on some hardware the cursor palette is shared with the screen palette, that's why I had fb_fix_cursorinfo.crsr_color[12] in the original cursor API.
E.g. Amiga graphics don't have inverse. There are 8 sprites, each can have 3 colors (+ transparency). The colors are shared with the screen palette (unless your screen has at most 16 colors): - sprites 0 and 1: transparent, palette[17], palette[18], palette[19] - sprites 2 and 3: transparent, palette[21], palette[22], palette[23] - sprites 4 and 5: transparent, palette[25], palette[26], palette[27] - sprites 6 and 7: transparent, palette[29], palette[30], palette[31] There's also a special mode to combine an even an odd sprite to form a 15-color (+ transparency) sprite.
Yes, it can be difficult to find a _good_ API ;-)
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
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
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