1.3 now works also on a t.fen file

bin/fen2img

@@ -5,20 +5,20 @@
 --  This script is free software; you can redistribute it and/or   --
 --         modify it under the same terms as Lua5 itself.          --
 ---------------------------------------------------------------------
-local Version = '1.2  for Lua5'
-local VersionDate  = '27jun2018';
+local Version = '1.3  for Lua5'
+local VersionDate  = '28jun2018';
 local Synopsis = [[
 fen2img [-w 350] \
   'rnb1k1nr/pppp1ppp/8/4p3/3b3q/4PPP1/PPP2K1P/RNBQ1BNR b KQkq - 0 5' \
    output.png
-# default width is 400 pixels
+# default width is 500 pixels
 # output file can be a .jpg or .png or .eps
 perldoc fen2img     # read the manual :-)
 ]]
 
 local FEN = require 'chess.fen'
 
-Width  = 400;
+Width  = 500;
 Flip   = 'false'
 
 local function which(s)
@@ -61,6 +61,13 @@ Dx     = round(Width * 0.1)
 
 Fenstr  = arg[iarg]
 if not Fenstr then die('must specify FEN string') end
+-- if Fenstr ends in .fen and exists as a file then it should be read as a file
+if string.match(Fenstr, '%.fen$') then
+	local fenfh = assert(io.open(Fenstr, 'r'))
+	Fenstr = string.gsub(fenfh:read('a'), '%s+$', '')
+	io.close(fenfh)
+end
+
 Output  = arg[iarg+1]
 if not Output then die('must specify output file') end
 -- 20180627 must be able to pipe into display, so if no output file
@@ -406,7 +413,7 @@ fen2img - Creates a .png or .jpg diagram of a chess position in FEN
  fen2img -w 500 "$FEN" /tmp/t.png
  fen2img -w 500 "$FEN" /tmp/t.eps
  fen2img -w 500 "$FEN" - | display -   # pipes into display as a .png
- fen2img -w 500 "$FEN" -f - | display -   # flip the display
+ fen2img -f -w 500 "$FEN" - | display -   # flip the display
 
 =head1 DESCRIPTION
 
@@ -425,10 +432,11 @@ to convert into C<.jpg> or C<.png> format.
 
 The board will be displayed B<F>lipped, ie: from Black's point of view.
 
-=item I<-w 500>
+=item I<-w 700>
 
 This option sets the B<W>idth in pixels of the C<.jpg> or C<.png> image,
 or the width in points of C<.eps> files.
+The default width is 500.
 
 =item I<-v>
 
@@ -463,6 +471,7 @@ which you move into C</usr/share/fonts/truetype/>
 
 =head1 CHANGES
 
+ 20180628 1.3 now works also on a t.fen file
  20180627 1.2 introduce the -f Flip option
  20180627 1.1 allows output on stdout, for piping into display
  20180411 1.0 first working version

html/fen2img.html

@@ -43,17 +43,17 @@ CONTENT="PostScript, chess, FEN, pgn, jpg">
 
 <H3 id="SYNOPSIS">SYNOPSIS</H3>
 
-<pre><code> fen2img -w 500 \
+<pre><code> fen2img -w 800 \
    'rnb1k1nr/pppp1ppp/8/4p3/3b3q/4PPP1/PPP2K1P/RNBQ1BNR b KQkq - 0 5' \
    /tmp/hammerschlag.png
  display /tmp/hammerschlag.png
 
  FEN=`pgn2fen '1.f3 e5 2. Kf2 Bc5+ 3.d4 Qh4+ 4. g3 Bxd4+ 5.e3'`
- fen2img -w 500 "$FEN" /tmp/t.jpg
- fen2img -w 500 "$FEN" /tmp/t.png
- fen2img -w 500 "$FEN" /tmp/t.eps
- fen2img -w 500 "$FEN" - | display -   # pipes a .png into display
- fen2img -w 500 "$FEN" -f - | display -   # flip the display</code></pre>
+ fen2img "$FEN" /tmp/t.jpg
+ fen2img "$FEN" /tmp/t.png
+ fen2img "$FEN" /tmp/t.eps
+ fen2img -w 800 "$FEN" - | display -   # pipes a .png into display
+ fen2img -f -w 800 "$FEN" - | display -   # flip the display</code></pre>
 
 <H3 id="DESCRIPTION">DESCRIPTION</H3>
 
@@ -74,10 +74,11 @@ to convert into <code>.jpg</code> or <code>.png</code> format.</p>
 ie: from Black's point of view.</p>
 </dd>
 
-<dt id="w-500"><i>-w 500</i></dt> <dd>
+<dt id="w-700"><i>-w 700</i></dt> <dd>
 <p>This option sets the <b>W</b>idth in pixels of the <code>.jpg</code>
 or <code>.png</code> image, or the width in points of <code>.eps</code>
-files.</p>
+files.
+The default width is 500</p>
 </dd>
 
 <dt id="v"><i>-v</i></dt> <dd>
@@ -105,7 +106,8 @@ It also needs a particular TrueType font:</p>
 </p>
 
 <H3 id="CHANGES">CHANGES</H3>
-<PRE> 20180627 1.2 introduce the -f Flip option
+<PRE> 20180628 1.3 now works also on a t.fen file
+ 20180627 1.2 introduce the -f Flip option
  20180627 1.1 allows output on stdout, for piping into display
  20180411 1.0 first working version
 </PRE>