[GRASS5] Driver Update

[Glynn Clements]

Glynn Clements wrote:

> > thanks for your fixes. Now color quality is as expected (no more odd
> > dithering). However, unfortunately the "output" option is gone which
> > is needed - or do you know a different way to store such images?
> > 
> > An example, where this is needed: If you want to create shaded maps
> > (as done in my example from yesterday), you need the "output" parameter
> > to store the result. This feature is also implemented in "tcltkgrass"
> > (Display -> shaded map).
> 
> In a previous message I did say that I'd look into producing an r.his
> program (there's no reason why generating raster layers should require
> a monitor to be running).

OK; I've committed "r.his". In short:

	r.his h=... i=... s=... r=R g=G b=B
	d.rgb r=R g=G b=B

produces the same results as

	d.his h=... i=... s=... 

> If this "colour image" kludge is deemed sufficiently important, there
> should be a single r.rgb.to.cell (or whatever) program which takes
> separate R,G,B layers and produces a CELL map according to
> user-specified settings

I'll do this next.

-- 
Glynn Clements <glynn.clements at virgin.net>