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#!perl -w
use strict;
use lib 't';
use Test::More tests => 68;
BEGIN { use_ok(Imager=>':all') }
require "t/testtools.pl";
Imager::init('log'=>'testout/t40scale.log');
my $img=Imager->new();
ok($img->open(file=>'testimg/scale.ppm',type=>'pnm'),
"load test image") or print "# ",$img->errstr,"\n";
my $scaleimg=$img->scale(scalefactor=>0.25)
or print "# ",$img->errstr,"\n";
ok($scaleimg, "scale it (good mode)");
ok($scaleimg->write(file=>'testout/t40scale1.ppm',type=>'pnm'),
"save scaled image") or print "# ",$img->errstr,"\n";
$scaleimg=$img->scale(scalefactor=>0.25,qtype=>'preview');
ok($scaleimg, "scale it (preview)") or print "# ",$img->errstr,"\n";
ok($scaleimg->write(file=>'testout/t40scale2.ppm',type=>'pnm'),
"write preview scaled image") or print "# ",$img->errstr,"\n";
{
# check for a warning when scale() is called in void context
my $warning;
local $SIG{__WARN__} =
sub {
$warning = "@_";
my $printed = $warning;
$printed =~ s/\n$//;
$printed =~ s/\n/\n\#/g;
print "# ",$printed, "\n";
};
$img->scale(scalefactor=>0.25);
cmp_ok($warning, '=~', qr/void/, "check warning");
cmp_ok($warning, '=~', qr/t40scale\.t/, "check filename");
$warning = '';
$img->scaleX(scalefactor=>0.25);
cmp_ok($warning, '=~', qr/void/, "check warning");
cmp_ok($warning, '=~', qr/t40scale\.t/, "check filename");
$warning = '';
$img->scaleY(scalefactor=>0.25);
cmp_ok($warning, '=~', qr/void/, "check warning");
cmp_ok($warning, '=~', qr/t40scale\.t/, "check filename");
}
{ # https://rt.cpan.org/Ticket/Display.html?id=7467
# segfault in Imager 0.43
# make sure scale() doesn't let us make an image zero pixels high or wide
# it does this by making the given axis as least 1 pixel high
my $out = $img->scale(scalefactor=>0.00001);
is($out->getwidth, 1, "min scale width");
is($out->getheight, 1, "min scale height");
$out = $img->scale(scalefactor=>0.00001, qtype => 'preview');
is($out->getwidth, 1, "min scale width (preview)");
is($out->getheight, 1, "min scale height (preview)");
}
{ # error handling - NULL image
my $im = Imager->new;
ok(!$im->scale(scalefactor => 0.5), "try to scale empty image");
is($im->errstr, "empty input image", "check error message");
# scaleX/scaleY
ok(!$im->scaleX(scalefactor => 0.5), "try to scaleX empty image");
is($im->errstr, "empty input image", "check error message");
ok(!$im->scaleY(scalefactor => 0.5), "try to scaleY empty image");
is($im->errstr, "empty input image", "check error message");
}
{ # invalid qtype value
my $im = Imager->new(xsize => 100, ysize => 100);
ok(!$im->scale(scalefactor => 0.5, qtype=>'unknown'), "unknown qtype");
is($im->errstr, "invalid value for qtype parameter", "check error message");
# invalid type value
ok(!$im->scale(xpixels => 10, ypixels=>50, type=>"unknown"), "unknown type");
is($im->errstr, "invalid value for type parameter", "check error message");
}
SKIP:
{ # Image::Math::Constrain support
eval "require Image::Math::Constrain;";
$@ and skip "optional module Image::Math::Constrain not installed", 3;
my $constrain = Image::Math::Constrain->new(20, 100);
my $im = Imager->new(xsize => 160, ysize => 96);
my $result = $im->scale(constrain => $constrain);
ok($result, "successful scale with Image::Math::Constrain");
is($result->getwidth, 20, "check result width");
is($result->getheight, 12, "check result height");
}
{ # scale size checks
my $im = Imager->new(xsize => 160, ysize => 96); # some random size
scale_test($im, 'scale', 80, 48, "48 x 48 def type",
xpixels => 48, ypixels => 48);
scale_test($im, 'scale', 80, 48, "48 x 48 max type",
xpixels => 48, ypixels => 48, type => 'max');
scale_test($im, 'scale', 80, 48, "80 x 80 min type",
xpixels => 80, ypixels => 80, type => 'min');
scale_test($im, 'scale', 80, 48, "no scale parameters (default to 0.5 scalefactor)");
scale_test($im, 'scale', 120, 72, "0.75 scalefactor",
scalefactor => 0.75);
scale_test($im, 'scale', 80, 48, "80 width",
xpixels => 80);
scale_test($im, 'scale', 120, 72, "72 height",
ypixels => 72);
# scaleX
scale_test($im, 'scaleX', 80, 96, "defaults");
scale_test($im, 'scaleX', 40, 96, "0.25 scalefactor",
scalefactor => 0.25);
scale_test($im, 'scaleX', 120, 96, "pixels 120",
pixels => 120);
# scaleY
scale_test($im, 'scaleY', 160, 48, "defaults");
scale_test($im, 'scaleY', 160, 192, "2.0 scalefactor",
scalefactor => 2.0);
scale_test($im, 'scaleY', 160, 144, "pixels 144",
pixels => 144);
}
sub scale_test {
my ($in, $method, $exp_width, $exp_height, $note, @parms) = @_;
print "# $note: @parms\n";
SKIP:
{
my $scaled = $in->$method(@parms);
ok($scaled, "$method $note")
or skip("failed to scale", 2);
is($scaled->getwidth, $exp_width, "check width");
is($scaled->getheight, $exp_height, "check height");
}
}
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