Re: [Gnome-print] RGBA & DPI

[Damien Diederen <dash linuxbe org>]

Hello !

> > Doesn't postscript support some of these operations?  Perhaps we should
> > add them to the api with a implementation of rendering in the rgb like
> > drivers?
> 
> It was about 5 years ago when I programmed in real PS language.
> As much, as I remember - yes - PS allows to specify arbitrary fill
> behaviour, but this is specified as cell-filling function in PS language.
> So I am afraid, we cannot export this to gnome-print API easily.
> 
> Actually I've thought about a callback system, a la:
> 
> buf = xxx_print_prepare_buffer (gint width, gint height, gpointer data);
> xxx_print_get_pixel (buf, gint x, gint y, gpointer data);
> xxx_print_release_buffer (buf);
> 
> Use code can decide, if it allocates buffer & fills it once, or calculates
> pixel value every time.
> 
> The fill can then be specified, as
> 
> gnome_print_eofill_full (pc, prepare_func, pixel_func, release_func, 
>                          data);

I'm afraid this is not network transparent, and cannot be used by non-local
Bonobo components :(

> Regards,
> Lauris
> 

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-- 
Damien Diederen
dash@linuxbe.org
http://users.swing.be/diederen/