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#! perl
use strict;
use warnings;
use utf8;
-d 't' && chdir 't';
use Test::More tests => 7;
BEGIN { use_ok('HarfBuzz::Shaper') };
my $hb = HarfBuzz::Shaper->new;
$hb->set_font('/usr/share/fonts/opentype/urw-base35/NimbusRoman-Regular.otf');
$hb->set_size(36);
$hb->set_text("fiets");
my $e = $hb->get_font_extents;
ok( $e, "have font extents" );
my $result =
{ ascender => '24.588', descender => '-11.412', line_gap => '7.2' };
is_deeply( $e, $result, "font ltr extents" );
$e = $hb->get_font_extents('ttb');
ok( $e, "have ttb font extents" );
$result =
{ ascender => '18', descender => '-18', line_gap => '0' };
is_deeply( $e, $result, "font ttb extents" );
# Ligatures are ususally enabled by default.
$hb->set_features( 'liga=0' );
my $info = $hb->shaper;
$info = $hb->get_extents;
augment($info);
$result = [
{ g => 71,
x_bearing => 0.720, 'y_bearing' => 24.588,
height => -24.588, width => 13.068,
xMin => 0.720, yMin => 0.000,
xMax => 13.788, yMax => 24.588,
},
{ g => 74,
x_bearing => 0.576, 'y_bearing' => 24.588,
height => -24.588, width => 8.532,
xMin => 0.576, yMin => 0.000,
xMax => 9.108, yMax => 24.588,
},
{ g => 70,
x_bearing => 0.900, 'y_bearing' => 16.560,
height => -16.920, width => 14.364,
xMin => 0.900, yMin => -0.360,
xMax => 15.264, yMax => 16.560,
},
{ g => 85,
x_bearing => 0.468, 'y_bearing' => 20.844,
height => -21.204, width => 9.576,
xMin => 0.468, yMin => -0.360,
xMax => 10.044, yMax => 20.844,
},
{ g => 84,
x_bearing => 1.836, 'y_bearing' => 16.560,
height => -16.920, width => 10.692,
xMin => 1.836, yMin => -0.360,
xMax => 12.528, yMax => 16.560,
},
];
ok(compare( $info, $result ), "content without ligatures" );
# With ligatures.
$info = $hb->shaper( [ 'liga=1' ] );
$info = $hb->get_extents;
augment($info);
$result = [
{ g => 109,
x_bearing => 1.116, 'y_bearing' => 24.588,
height => -24.588, width => 17.640,
xMin => 1.116, yMin => 0.000,
xMax => 18.756, yMax => 24.588,
},
{ g => 70,
x_bearing => 0.900, 'y_bearing' => 16.560,
height => -16.920, width => 14.364,
xMin => 0.900, yMin => -0.360,
xMax => 15.264, yMax => 16.560,
},
{ g => 85,
x_bearing => 0.468, 'y_bearing' => 20.844,
height => -21.204, width => 9.576,
xMin => 0.468, yMin => -0.360,
xMax => 10.044, yMax => 20.844,
},
{ g => 84,
x_bearing => 1.836, 'y_bearing' => 16.560,
height => -16.920, width => 10.692,
xMin => 1.836, yMin => -0.360,
xMax => 12.528, yMax => 16.560,
},
];
ok(compare( $info, $result ), "content with ligatures" );
sub compare {
my ( $ist, $soll ) = @_;
unless ( @$ist == @$soll ) {
diag( scalar(@$ist) . " elements, must be " . scalar(@$soll) );
return;
}
for ( 0 .. @$ist-1 ) {
my $i = $ist->[$_];
my $j = $soll->[$_];
unless ( $i->{g} == $j->{g} ) {
diag( "CId $i->{g} must be $j->{g}" );
return;
}
for ( qw( x_bearing y_bearing width height ) ) {
next if $i->{$_} == $j->{$_};
unless ( abs( $i->{$_} - $j->{$_} ) <= abs($j->{$_} / 100) ) {
diag( "$_ $i->{$_} must be $j->{$_}" );
return;
}
}
for ( qw( xMin yMin xMax yMax ) ) {
last unless defined $j->{$_};
next if $i->{$_} == $j->{$_};
unless ( abs( $i->{$_} - $j->{$_} ) <= abs($j->{$_} / 100) ) {
diag( "$_ $i->{$_} must be $j->{$_}" );
return;
}
}
}
return 1;
}
sub augment {
my $info = shift;
for my $e ( @$info ) {
$e->{xMin} = $e->{x_bearing};
$e->{yMin} = $e->{y_bearing} + $e->{height}; # height is negative
$e->{xMax} = $e->{x_bearing} + $e->{width};
$e->{yMax} = $e->{y_bearing};
}
}
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