This file contains some possible things to do in future versions of xfig.

------------------
FORMAT 4.0 example
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#FIG 4.0
Res	1200/500	(use 1200 for inches, 500 for metric)
Bounds	300 500 3045 9302 (optional bounding box from figure compound)
Orient	Landscape
Units	Metric
Uscale	3cm=1ft		(screen ruler scale)
Pjust	Center		(page justification)
Psize	A4
Pmag	.9		(print/export magnification)
Pages	Multiple
Smag	.4		(screen magnification [zoom])
Backg	ivory		(canvas background color which is used by fig2dev too)
GIFTransp None		(GIF transparent color)
JPGQual	75		(JPEG quality)
Margin	15		(number of pixels for margin for bitmap export)

UCol 35 #440033		(User colors)

Line ...		(PolyLine separate from Box and Polygon)
Box			(three subtypes)
  Box-Arcbox ...	
  Box-Normal ...
  Box-Picture ...
Poly ...
Spline ...
Arc			(three subtypes)
   Arc-Open ...
   Arc-Pie-Wedge ...
   Arc-Elliptical ...
Text ...
Ellipse ...

Layer FirstFloor 10	(number is drawing order or depth)
....
ENDLayer FirstFloor

Compound ...
...
ENDCompound

********* NOTES about FORMAT 4.0 *********

Change line thickness to float for finer precision
Separate dash/dot length from the gap
Enhance pattern fill allow "transparent" fill so that only the pattern lines
	fill the shape, not the background color.
Enhance all objects to have cap_style type for dotted lines
Allow selecting linecap type for dotted lines for closed splines, boxes
	and ellipses
Rotatable boxes - store width, height, upper-left corner and angle only
Background color for text (or "None") to allow background (ala XDrawImageString)
	Note: need to add flag/call to text rotation code to do this
Honor fractional text sizes (float).  Currently, xfig reads the size as float
	but converts to integer internally.
No need for duplicating first point at end for polygon in file itself
Use PIX_PER_CM = 500 instead of 450 (w_setup.h)
	Need to rescale older (3.2.0 and older) metric figures by difference
Add canvas background color to Fig file
	add option to specify default color in fig2dev
Add elliptical arcs
Importing of Fig files as pictures
Add new font choices done by Ian Cameron Smith (clint@hermit.org http://www.hermit.org/)
Some kind of color pallette which is global (remains around between drawings)
   o Also library of color pallettes? 

*** END OF V4.0 IDEAS ***

----------------------------------------------------------
The following DON'T require a change to the file protocol:
----------------------------------------------------------

Have "static objects" which aren't erased when new figure is loaded.  This way
	you can have a template into which figures may be merged.
Option for grid to be constant screen-size (independent of zooming)
Allow picking of points that aren't on the positioning grid
Recursively uncompound objects with one click
Re-render imported EPS files (using gs) at new resolution when zooming LARGER
Moving object when point_posn mode is on should first move object to closest
	positioning grid position then allow movement from there.
Look in ../AppPlusS/XCC.c for code to allocate colors using any
	valid visual/depth/colormap.
Mode to rotate objects using only the mouse (requires new mode button)
Create resource for "print" command (e.g. lp, lpr, whatever) which uses meta-
	notation to place filename (e.g.  print_command: "lpr -P%p %f" where %p
	is the printer string and %f is the filename)
Allow option of vertically centering text either using the ascenders/descenders
	(the current method) or not
Allow vertically-aligned text
  "top" would mean the insertion point specifies the line over the top of the
        text
  "middle" would mean that it specifies the midline of the text (I'm not
        sure how this is defined, perhaps the average of top and base
        or top and bottom.
  "base" would mean the line under all letters which do not hang down.
        For example, g and j extend below the baseline.
  "bottom" would mean the time under the bottom of the text including
        descenders.
Change eps_bitmaps so that background is transparent; i.e. stipple
Extend smart links to work for SCALE, MOVEPT and perhaps EDIT, UPDATE.
	Could also extend them to work for arc-type links and for
	ellipse/circle objects and objects inside compound objects.
	Also, at the moment smart-links
	only work for one end of a link if both ends of the link
	happen to touch the object being operated on.  To fix this would
	require changing the F_linkinfo structure to have left_endpt,
	left_prevpt, right_endpt, right_prevpt fields instead of the current
	endpt, prevpt and two_pts fields.
Generalize align mode (like glue mode) to allow arbitrary tagged objects to be
	aligned rather than just compounds.
Make a raise/lower depth feature
A 'gravity' mode whereby points placed by aiming and clicking are brought not
	to the closest fiducial point of a figure, but to the closest continuous
	point on the figure (applies only to circles, arcs and straight lines),
	taking into account constraints of angle (like manhattan constraint).
	Example 1:  I click near the circumference of a circle.  The point is
	placed exactly on the circumference, closest to where I clicked.
	This is very useful for getting lines to touch circles exactly in points
	other than the E, W, S, or N extreme.  Example 2:  I am in manhattan
	constraint, and I click near a random-slope line.  The point is placed
	on the line in the one place consistent with the manhattan constraint.