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#! /usr/bin/perl -w
#
# Testing dvi2bitmap specials
#
# Create a TeX file with strut and mark specials in it, use
# --query=bitmaps, and check that the correct stuff is reported.
sub compare_bitmaps($$\@);
$texbin='@TEX@';
if ($texbin eq 'NO_TEX') {
print STDERR "No TeX binary available. Can't run t8, so assume success\n";
exit 0;
}
$prefix = 'temp-t8';
$texfile = "$prefix.tex";
$m = 2; # magnification factor
open (TEX, ">$texfile") || die "Can't open $texfile for output";
$newpage = "\n\n\\vfill\\eject\n\n";
$nerrors = 0;
@expected = ();
print TEX <<'EOD';
%\hoffset=0pt
%\voffset=0pt
%\leftskip=0pt % default
%\topskip=0pt
%\parindent=0pt
%\parskip=0pt
\nopagenumbers
EOD
print TEX "\\special{dvi2bitmap default unit bp}\n\n";
print TEX '\vrule width 20bp height 10bp';
print TEX $newpage;
push(@expected, [20*$m, 10*$m]);
print TEX '\vrule width 20bp height 10bp \special{dvi2bitmap strut 10 4 5 6}';
print TEX $newpage;
push(@expected, [24*$m, 16*$m]);
print TEX '\vrule width 10bp height 10bp \special{dvi2bitmap strut 12 0 15 0}';
print TEX $newpage;
push(@expected, [12*$m, 15*$m]);
print TEX '\vrule width 20bp height 10bp \special{dvi2bitmap mark}';
print TEX $newpage;
push(@expected, [20*$m, 10*$m, 20*$m, 10*$m]);
print TEX "\\bye\n";
close(TEX);
system("$texbin $prefix") == 0
|| die "Command 'tex $prefix' failed";
########## test 1
#
# Basic use
$cmd = sprintf("../dvi2bitmap --output=%s-%%d --query=bitmaps --resolution=%d --verbose=quiet %s.dvi",
$prefix, 72*$m, $prefix);
$nerrors += compare_bitmaps("Test 1", $cmd, @expected);
########## test 2
#
# Same, but with a --magnification of 2, so that the expected values
# must be doubled
@texpected = ();
foreach my $ev (@expected) {
my @t = ();
foreach my $tt (@$ev) {
push (@t, $tt*2);
}
push (@texpected, \@t);
}
$cmd = sprintf("../dvi2bitmap --output=%s-%%d --query=bitmaps --resolution=%d --verbose=quiet --magnification=2 %s.dvi",
$prefix, 72*$m, $prefix);
$nerrors += compare_bitmaps("Test 2", $cmd, @texpected);
########## test 3
#
# Same, but with a --magnification of 5, so that the expected values
# must be multiplied by 5. This should show up more straightforward
# rounding errors
@texpected = ();
foreach my $ev (@expected) {
my @t = ();
foreach my $tt (@$ev) {
push (@t, $tt*5);
}
push (@texpected, \@t);
}
$cmd = sprintf("../dvi2bitmap --output=%s-%%d --query=bitmaps --resolution=%d --verbose=quiet --magnification=5 %s.dvi",
$prefix, 72*$m, $prefix);
$nerrors += compare_bitmaps("Test 3", $cmd, @texpected);
########## test 4
#
# Same, but with a --magnification of 3 and --scaledown of 2. This
# seems to stress roundings. In DviFilePosition::DviFilePosition, the
# initialised positions are offset by one to avoid a failure here (and
# are otherwise unmotivated). [there's a reference to this text there,
# so change both together]
@texpected = ();
foreach my $ev (@expected) {
my @t = ();
foreach my $tt (@$ev) {
push (@t, $tt*1.5);
}
push (@texpected, \@t);
}
$cmd = sprintf("../dvi2bitmap --output=%s-%%d --query=bitmaps --resolution=%d --verbose=quiet --magnification=3 --scaledown=2 %s.dvi",
$prefix, 72*$m, $prefix);
$nerrors += compare_bitmaps("Test 4", $cmd, @texpected);
########## That's all....
exit($nerrors);
sub compare_bitmaps ($$\@) {
my $testlabel = shift;
my $cmd = shift;
my $exref = shift;
my $nerr = 0;
my @exp = @$exref;
open (DB, "$cmd |") || die "Can't open $cmd in a pipe";
my $ntests = 0;
while (<DB>) {
chomp;
s/^Qbitmaps \S*\s*//;
my @a = split;
if ($#expected < 0) {
print STDERR "More actual than expected\n";
$nerr++;
last;
}
my @e = @{$exp[$ntests]};
$ntests++;
my $isok = 1;
my $i = 0;
while (1) {
if (! (defined($e[$i]) && defined($a[$i]))) { # one list has ended
$isok = !(defined($e[$i]) || defined($a[$i]));
# false unless both undef
last;
}
if ($e[$i] != $a[$i]) {
$isok = 0;
last;
}
$i++;
}
if (!$isok) {
print STDERR "$testlabel, page $ntests: expected [";
foreach $i (0..$#e) {
printf STDERR " %.1f", $e[$i];
}
print STDERR " ], got [";
foreach $i (0..$#a) {
printf STDERR " %.1f", $a[$i];
}
print " ]\n";
$nerr++;
}
}
close(DB);
return $nerr;
}
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