'set palette maxcolors' for x11

[Petr M. <mi...@ph...>]

Using a code like

set pal maxcolor 5
set pm3d map
splot x
set out 'a.png'; set term png; replot
set out 'a.ps'; set term post color; replot
set out 'a.pdf'; set term pdf; replot
set out 'a.svg'; set term svg; replot
set out 'a.fig'; set term fig; replot

I have noticed that:

1. X11 draws (maps) one color less.

2. pdf, svg give wrong mapping -- I've just fixed this, together with
aquaterm.

3. postscript makes one color wrong only for 'set pal maxcolor 3'.


The fix of 2. consists of using new routines rgb1maxcolors_from_gray() and
rgb255maxcolors_from_gray() instead of rgb1_from_gray() and
rgb255_from_gray().


Please somebody fix X11 terminal so that:
  - it maps correct number of colors,
  - the color mapping is exactly as in png.

--
PM