xfig export has problems with color definitions

[westram]

Behavior (r15269, demo.arb):

• Exporting to xfig results in xfig-warnings:

  Invalid color definition: 0 4155 #00aa00, setting to black (#00000).
  Invalid color definition: 0 4156 #00aa00, setting to black (#00000).
  [... consecutive numbers removed]
  Invalid color definition: 0 4168 #00aa00, setting to black (#00000).
  Invalid color definition: 0 4169 #00aa00, setting to black (#00000).
  

• With active shader, xfig warnings change to

  Cannot locate user color 1242, using default color for line 4518.
  Cannot locate user color 1274, using default color for line 4520.
  [...]
  Cannot locate user color 1202, using default color for line 5108.
  Cannot locate user color 1202, using default color for line 5110.
  

• warnings disappear in 'export colors' is unchecked
• using print/preview causes SEGV in fig2dev (only if 'export colors' is checked!)
  • no error is forwarded to in that case

[westram]

• ok in [15053]; broken by [15054]
  • diff:trunk@15053:15054
• [15054] was merged for color-branch:
  • ok in [14932]; broken by [14936]
    • diff:branches/color@14932:14936
• [14936] just activates color-range ⇒ is only triggered here, cause lies somewhere before

[westram]

workaround:

• export to xfig (from arb)
  • warns about Invalid color definitions (see above)
• export to eps (from xfig)
• print eps (from gv) ⇒ prints correct colors

[westram]

by [17002]

[westram]

Milestone renamed