#!perl -w
use strict;
-use lib 't';
-use Test::More tests => 16;
+use Test::More tests => 232;
BEGIN { use_ok(Imager=>':all') }
+use Imager::Test qw(is_image is_color4 is_image_similar);
-require "t/testtools.pl";
+-d "testout" or mkdir "testout";
Imager::init('log'=>'testout/t40scale.log');
my $img=Imager->new();
ok($scaleimg->write(file=>'testout/t40scale2.ppm',type=>'pnm'),
"write preview scaled image") or print "# ",$img->errstr,"\n";
+$scaleimg = $img->scale(scalefactor => 0.25, qtype => 'mixing');
+ok($scaleimg, "scale it (mixing)") or print "# ", $img->errstr, "\n";
+ok($scaleimg->write(file=>'testout/t40scale3.ppm', type=>'pnm'),
+ "write mixing scaled image") or print "# ", $img->errstr, "\n";
+
+{ # double image scaling with mixing, since it has code to handle it
+ my $dimg = Imager->new(xsize => $img->getwidth, ysize => $img->getheight,
+ channels => $img->getchannels,
+ bits => 'double');
+ ok($dimg, "create double/sample image");
+ $dimg->paste(src => $img);
+ $scaleimg = $dimg->scale(scalefactor => 0.25, qtype => 'mixing');
+ ok($scaleimg, "scale it (mixing, double)");
+ ok($scaleimg->write(file => 'testout/t40mixdbl.ppm', type => 'pnm'),
+ "write double/mixing scaled image");
+ is($scaleimg->bits, 'double', "got the right image type as output");
+
+ # hscale only, mixing
+ $scaleimg = $dimg->scale(xscalefactor => 0.33, yscalefactor => 1.0,
+ qtype => 'mixing');
+ ok($scaleimg, "scale it (hscale, mixing, double)");
+ is($scaleimg->getheight, $dimg->getheight, "same height");
+ ok($scaleimg->write(file => 'testout/t40hscdmix.ppm', type => 'pnm'),
+ "save it");
+
+ # vscale only, mixing
+ $scaleimg = $dimg->scale(xscalefactor => 1.0, yscalefactor => 0.33,
+ qtype => 'mixing');
+ ok($scaleimg, "scale it (vscale, mixing, double)");
+ is($scaleimg->getwidth, $dimg->getwidth, "same width");
+ ok($scaleimg->write(file => 'testout/t40vscdmix.ppm', type => 'pnm'),
+ "save it");
+}
+
{
# check for a warning when scale() is called in void context
my $warning;
$out = $img->scale(scalefactor=>0.00001, qtype => 'preview');
is($out->getwidth, 1, "min scale width (preview)");
is($out->getheight, 1, "min scale height (preview)");
+
+ $out = $img->scale(scalefactor=>0.00001, qtype => 'mixing');
+ is($out->getwidth, 1, "min scale width (mixing)");
+ is($out->getheight, 1, "min scale height (mixing)");
+}
+
+{ # 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);
+
+ # new scaling parameters in 0.54
+ scale_test($im, 'scale', 80, 48, "xscale 0.5",
+ xscalefactor => 0.5);
+ scale_test($im, 'scale', 80, 48, "yscale 0.5",
+ yscalefactor => 0.5);
+ scale_test($im, 'scale', 40, 48, "xscale 0.25 yscale 0.5",
+ xscalefactor => 0.25, yscalefactor => 0.5);
+ scale_test($im, 'scale', 160, 48, "xscale 1.0 yscale 0.5",
+ xscalefactor => 1.0, yscalefactor => 0.5);
+ scale_test($im, 'scale', 160, 48, "xpixels 160 ypixels 48 type nonprop",
+ xpixels => 160, ypixels => 48, type => 'nonprop');
+ scale_test($im, 'scale', 160, 96, "xpixels 160 ypixels 96",
+ xpixels => 160, ypixels => 96);
+ scale_test($im, 'scale', 80, 96, "xpixels 80 ypixels 96 type nonprop",
+ xpixels => 80, ypixels => 96, type => 'nonprop');
+
+ # scaleX
+ scale_test($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);
+}
+
+{ # check proper alpha handling for mixing
+ my $im = Imager->new(xsize => 40, ysize => 40, channels => 4);
+ $im->box(filled => 1, color => 'C0C0C0');
+ my $rot = $im->rotate(degrees => -4)
+ or die;
+ $rot = $rot->to_rgb16;
+ my $sc = $rot->scale(qtype => 'mixing', xpixels => 40);
+ my $out = Imager->new(xsize => $sc->getwidth, ysize => $sc->getheight);
+ $out->box(filled => 1, color => 'C0C0C0');
+ my $cmp = $out->copy;
+ $out->rubthrough(src => $sc);
+ is_image($out, $cmp, "check we get the right image after scaling (mixing)");
+
+ # we now set alpha=0 pixels to zero on scaling
+ is_color4($sc->getpixel('x' => 39, 'y' => 39), 0, 0, 0, 0,
+ "check we set alpha=0 pixels to zero on scaling");
+}
+
+{ # check proper alpha handling for default scaling
+ my $im = Imager->new(xsize => 40, ysize => 40, channels => 4);
+ $im->box(filled => 1, color => 'C0C0C0');
+ my $rot = $im->rotate(degrees => -4)
+ or die;
+ my $sc = $rot->scale(qtype => "normal", xpixels => 40);
+ my $out = Imager->new(xsize => $sc->getwidth, ysize => $sc->getheight);
+ $out->box(filled => 1, color => 'C0C0C0');
+ my $cmp = $out->copy;
+ $out->rubthrough(src => $sc);
+ is_image_similar($out, $cmp, 100, "check we get the right image after scaling (normal)");
+
+ # we now set alpha=0 pixels to zero on scaling
+ is_color4($sc->getpixel('x' => 39, 'y' => 39), 0, 0, 0, 0,
+ "check we set alpha=0 pixels to zero on scaling");
+}
+
+{ # scale_calculate
+ my $im = Imager->new(xsize => 100, ysize => 120);
+ is_deeply([ $im->scale_calculate(scalefactor => 0.5) ],
+ [ 0.5, 0.5, 50, 60 ],
+ "simple scale_calculate");
+ is_deeply([ Imager->scale_calculate(scalefactor => 0.5) ],
+ [], "failed scale_calculate");
+ is_deeply([ Imager->scale_calculate(width => 120, height => 150,
+ xpixels => 240) ],
+ [ 2.0, 2.0, 240, 300 ],
+ "class method scale_factor");
+}
+
+{ # passing a reference for scaling parameters should fail
+ # RT #35172
+ my $im = Imager->new(xsize => 100, ysize => 100);
+ ok(!$im->scale(xpixels => {}), "can't use a reference as a size");
+ cmp_ok($im->errstr, '=~', "xpixels parameter cannot be a reference",
+ "check error message");
+}
+
+sub scale_test {
+ my ($in, $method, $exp_width, $exp_height, $note, @parms) = @_;
+
+ print "# $note: @parms\n";
+ for my $qtype (qw(normal preview mixing)) {
+ SKIP:
+ {
+ my $scaled = $in->$method(@parms, qtype => $qtype);
+ ok($scaled, "$method $note qtype $qtype")
+ or skip("failed to scale", 2);
+ is($scaled->getwidth, $exp_width, "check width");
+ is($scaled->getheight, $exp_height, "check height");
+ }
+ }
}
projects / imager.git / blobdiff