Re: pngcairo: suggestion for additional option

[Ethan A M. <merritt@u.washington.edu>]

On Friday 23 November 2007 16:56, pl...@pi... wrote:
> On Sat, 24 Nov 2007 01:24:09 +0100, Allin Cottrell <cot...@wf...>  
> wrote:
> >
> > gp_cairo.h: #define GP_CAIRO_SCALE 20
> >
> 
> So you should probalby be using the named const not a number.

No core routine should be peering into the code of individual terminal
drivers, nor making terminal-specific decisions.  If it is necessary to 
get additional information from the terminal, it should either be
returned by one of the terminal entry routines term->foo()  or be
exported directly in the terminal table analogous to term->xmax and
term-ymax.

But please also think of alternative ways to accomplish this.
For instance, instead of setting these GPVAL_GRAPH_XMIN values from a
core routine, how about the driver setting them as part of the
term->text() processing?  In that case we might want to start up a 
new series of exported variable names.  We already have GPVAL_*, MOUSE_*,
and FIT_*.  These could be TERM_* or AXISCALE_* or something like that.


-- 
Ethan A Merritt