From: ian <ian>
Date: Fri, 22 Oct 2004 00:52:26 +0000 (+0000)
Subject: it assigns colours - but layout cannot read them yet
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ijackson/git?a=commitdiff_plain;h=14abe2c439963b062eb9e02cdc8a02aaa46cc65a;p=trains.git

it assigns colours - but layout cannot read them yet
---

diff --git a/layout/segcmapassign b/layout/segcmapassign
index 3de3fd3..8ddf3ca 100755
--- a/layout/segcmapassign
+++ b/layout/segcmapassign
@@ -1,16 +1,27 @@
-#!/usr/bin/perl
+#!/usr/bin/perl -w
 # input file:
 #   lines, with one canonical subsegment specification (csss) each
 #   (need not be unique)
 # output:
 #   lines:
-#       <csss> <green> <blue> <stuff which will be ignored...>
+#
+# C <csss> <green> <blue>
 #   where <csss> is N/[MP] (see informat.txt) and <green> and <blue>
 #   contain no whitespace and are suitable for inserting like this
 #   into the PostScript output:
 #         ...code to compute and stack red in range [0,1>...
 #          <green> <blue> setrgbcolor
 #
+# S <segname> 0x<segnum>
+# F <segname> 0x<segnum> <featname> 0x<prefix> <configbits> <maxconfig>
+#      where (1<<configbits)-1 are the bits for the config
+#      and ~((1<<configbits)-1) are the bits for the prefix
+#      and maxconfig is the maximum configuration number used by the layout
+#
+# # comments for debugging segcmapassign etc.
+# E
+#     final line, always present
+#
 # Encoding is as follows (bits from MSbit to LSbit):
 #
 #  RED
@@ -23,9 +34,86 @@
 #     6 bits moveable feature and position
 #          each moveable feature has an unambiguous prefix
 #          the remainder of the bits are the position of that feature
-#       the feature all-bits-1 (0b1111111) is for fixed track
+#       the feature all-bits-1 (0b111111) is for fixed track
 #       (so every moveable feature prefix must contain at least one 0)
 #
 #  BLUE
 #     8 bits segment main
 
+use strict;
+use IO::Handle;
+
+our ($seg,$movfeat,$movconf,$si,$fi);
+our (%seg);
+
+while (<>) {
+    m,^(\w*)/([A-Za-z_]*)(\d*)$, or die;
+    ($seg,$movfeat,$movconf)=($1,$2,$3);
+    if (!length $seg) {
+	printf("C /%s%s 0 0\n",
+	       $seg, $movfeat, $movconf)
+	    or die $!;
+	next;
+    }
+    die if length $movconf && !length $movfeat;
+    exists $seg{$seg}{Num};
+    $si= $seg{$seg};
+    if (length $movfeat) {
+	exists $si->{Feat}{$movfeat}{Max};
+	$fi= $si->{Feat}{$movfeat};
+	$fi->{Max}=0 unless exists $fi->{Max};
+	$fi->{Max}=$movconf unless $fi->{Max} >= $movconf;
+    }
+}
+
+sub cssnmap ($$$$) {
+    my ($seg,$movfeatconf,$segnum,$posinfo) = @_;
+    my ($green,$blue);
+    $green= (($segnum >> 8) & 0x03)<<6;
+    $green |= $posinfo;
+    $blue= $segnum & 0xff;
+    printf("C %s/%s %.10f %.10f\n".
+	   "# %s/%s 0x%x 0x%x\n",
+	   $seg,$movfeatconf,
+	   $green/255, $blue/255,
+	   $seg,$movfeatconf,
+	   $green, $blue)
+	or die $!;
+}
+	
+our ($segnum) = 1;
+
+our ($conf,$posbit,$posbiti,$nextfree);
+
+foreach $seg (sort keys %seg) {
+    $si= $seg{$seg};
+    $si->{Num}= $segnum++;
+    die if $si->{Num} >= 1024;
+    $nextfree= 0;
+    printf("S %s 0x%x\n",
+	   $seg, $si->{Num})
+	or die $!;
+    cssnmap($seg,'', $si->{Num}, 0x3f);
+    foreach $movfeat (sort {
+	$si->{Feat}{$b}{Max} <=> $si->{Feat}{$a}{Max};
+    } keys %{ $si->{Feat} }) {
+	$fi= $si->{Feat}{$movfeat};
+	for ($posbit=1,$posbiti=0;
+	     $posbit<=$fi->{Max};
+	     $posbit<<=1,$posbiti++) { }
+	$fi->{Prefix}= $nextfree;
+	$fi->{ConfigMask}= $posbit-1;
+	$fi->{ConfigBits}= $posbiti;
+	$nextfree += $posbit;
+        printf("F %s 0x%x %s 0x%x %d 0x%x\n",
+	       $seg, $si->{Num},
+	       $movfeat, $fi->{Prefix}, $fi->{ConfigBits}, $fi->{Max});
+	foreach ($conf=0; $conf<=$fi->{Max}; $conf++) {
+	    cssnmap($seg, $movfeat.$conf, $si->{Num}, $fi->{Prefix}+$conf);
+	}
+    }
+    die "too many $seg" if $nextfree > 0x03f;
+}
+
+STDIN->error and die $!;
+print "E\n" or die $!;