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    SubjectRe: [Linux-fbdev-devel] Re: fbdev changes.
    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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