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#!/usr/local/bin/perl
##############################################################################
# Time-stamp: <Wed Jul 24 1996 22:19:02 Stardate: [-31]7859.44 hwloidl>
#
# Usage: ps-scale-y [options] <file>
#
# It is assumed that the last line of <file> is of the format:
# %% y_scaling: <f> max: <n>
# where <f> is a floating point number determining the amount of scaling of
# the y-axis of the graph that is necessary. <n> is the real maximal number
# of tasks in the program (needed to rebuild y-axis). This script replaces the
# definitions of the PostScript functions scale-y and unscale-y in <file> by
# new definitions that do the right amount of scaling.
# The y-axis is rebuilt (using the above maximal number of tasks and a copy
# of the print_y_axis routine from qp2ps).
# If the above line doesn't exist, <file> is unchanged.
# This script is typically called from gr2ps.
#
##############################################################################
require "getopts.pl";
&Getopts('hv');
do process_options();
$tmpfile = ",t";
$debug = 0;
# NB: This must be the same as in qp2ps!!
$xmin = 100;
$xmax = 790;
$scalex = $xmin;
$labelx = $scalex - 45;
$markx = $scalex - 30;
$major = $scalex - 5;
$majorticks = 10;
$mmax = 1;
$amax = 0;
$ymin = 50;
$ymax = 500;
# E
open (GET_SCALING,"cat $file | tail -1 |") || die "Can't open pipe: $file | tail -1 |\n";
$y_scaling = 1.0;
while (<GET_SCALING>){
# print STDERR $_;
if (/^\%\%\s+y_scaling:\s+([0-9\.]+)\s+max:\s+(\d+)/) {
$y_scaling = $1;
$pmax = $2;
$y_translate = 1.0 - $y_scaling;
}
}
close (GET_SCALING);
if ( $y_scaling != 1.0 ) {
print STDERR "Scaling $file ($y_scaling; $pmax tasks) ...\n" if $opt_v;
# print STDERR "SCALING NECESSARY: y_scaling = $y_scaling; y_translate = $y_translate !\n";
} else {
# No scaling necessary!!
exit 0;
}
open (IN,"<$file") || die "Can't open file $file\n";
open (OUT,">$tmpfile") || die "Can't open file $tmpfile\n";
$skip = 0;
while (<IN>) {
$skip = 0 if $skip && /^% End Y-Axis.$/;
next if $skip;
if (/\/scale\-y/) {
print OUT "/scale-y { gsave\n" .
" 0 50 $y_translate mul translate\n" .
" 1 $y_scaling scale } def\n";
}
elsif (/\/unscale\-y/) {
print OUT "/unscale-y { grestore } def \n";
} else {
print OUT $_;
}
if (/^% Y-Axis:$/) {
$skip = 1;
do print_y_axis();
}
}
close (IN);
close (OUT);
rename($tmpfile,$file);
exit 0;
# ###########################################################################
# Same as in qp2ps (but printing to OUT)!
# ###########################################################################
sub print_y_axis {
local ($i);
local ($y, $smax,$majormax, $majorint);
# Y-axis label
print OUT "% " . ("-" x 75) . "\n";
print OUT "% Y-Axis (scaled):\n";
print OUT "% " . ("-" x 75) . "\n";
print OUT ("%scale-y % y-axis outside scaled area if ps-scale-y rebuilds it!\n");
print OUT ("gsave\n");
print OUT ("HE12 setfont\n");
print OUT ("(tasks)\n");
print OUT ("dup stringwidth pop\n");
print OUT ("$ymax\n");
print OUT ("exch sub\n");
print OUT ("$labelx exch\n");
print OUT ("translate\n");
print OUT ("90 rotate\n");
print OUT ("0 0 moveto\n");
print OUT ("show\n");
print OUT ("grestore\n");
# Scale
if ($pmax < $majorticks) {
$majorticks = $pmax;
}
print OUT ("HE12 setfont\n$scalex $ymin moveto\n$scalex $ymax lineto\n");
print OUT ("% Max number of tasks: $pmax\n");
print OUT ("% Number of ticks: $majorticks\n");
print OUT "0.5 setlinewidth\n";
$y = $ymax; # (($pmax - $ymin)/$majorticks) * ($majorticks-$i) + $ymin;
print OUT ("$scalex $y moveto\n$major $y lineto\n");
print OUT ("$markx $y moveto\n($pmax) show\n");
$majormax = int($pmax/$majorticks)*$majorticks;
$smax = $majormax*(($ymax-$ymin)/$pmax)+$ymin;
$majorint = $majormax/$majorticks;
for($i=1; $i <= $majorticks; ++$i) {
$y = (($smax - $ymin)/$majorticks) * ($majorticks-$i) + $ymin;
$majorval = int($majorint * ($majormax/$majorint-$i));
print OUT ("$scalex $y moveto\n$major $y lineto\n");
print OUT ("$markx $y moveto\n($majorval) show\n");
}
# print OUT ("$xmin $ymax moveto\n10 0 rlineto\n10 0 rmoveto\n($pmax) show\n");
print OUT " stroke\n";
print OUT "1 setlinewidth\n";
print OUT ("%unscale-y\n");
print OUT ("% End Y-Axis (scaled).\n");
print OUT "% " . ("-" x 75) . "\n";
}
# ----------------------------------------------------------------------------
sub process_options {
if ( $opt_h ) {
open(ME,$0) || die "Can't open myself ($0): $!\n";
$n = 0;
while (<ME>) {
last if $_ =~ /^$/;
print $_;
$n++;
}
close(ME);
exit ;
}
if ( $#ARGV != 0 ) {
print "Usage: $0 [options] <file>\n";
print "Use -h option to get details\n";
exit 1;
}
$file = $ARGV[0];
}
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