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#!perl -w
use strict;
use Test::More tests => 76;
use Imager qw(:all :handy);
use Imager::Test qw(is_image);
-d "testout" or mkdir "testout";
init_log("testout/t69rubthru.log", 1);
my $src_height = 80;
my $src_width = 80;
# raw interface
my $targ = Imager::ImgRaw::new(100, 100, 3);
my $src = Imager::ImgRaw::new($src_height, $src_width, 4);
my $halfred = NC(255, 0, 0, 128);
i_box_filled($src, 20, 20, 60, 60, $halfred);
ok(i_rubthru($targ, $src, 10, 10, 0, 0, $src_width, $src_height),
"low level rubthrough");
my $c = Imager::i_get_pixel($targ, 10, 10);
ok($c, "get pixel at (10, 10)");
ok(color_cmp($c, NC(0, 0, 0)) == 0, "check for correct color");
$c = Imager::i_get_pixel($targ, 30, 30);
ok($c, "get pixel at (30, 30)");
ok(color_cmp($c, NC(128, 0, 0)) == 0, "check color");
my $black = NC(0, 0, 0);
# reset the target and try a grey+alpha source
i_box_filled($targ, 0, 0, 100, 100, $black);
my $gsrc = Imager::ImgRaw::new($src_width, $src_height, 2);
my $halfwhite = NC(255, 128, 0);
i_box_filled($gsrc, 20, 20, 60, 60, $halfwhite);
ok(i_rubthru($targ, $gsrc, 10, 10, 0, 0, $src_width, $src_height),
"low level with grey/alpha source");
$c = Imager::i_get_pixel($targ, 15, 15);
ok($c, "get at (15, 15)");
ok(color_cmp($c, NC(0, 0, 0)) == 0, "check color");
$c = Imager::i_get_pixel($targ, 30, 30);
ok($c, "get pixel at (30, 30)");
ok(color_cmp($c, NC(128, 128, 128)) == 0, "check color");
# try grey target and grey alpha source
my $gtarg = Imager::ImgRaw::new(100, 100, 1);
ok(i_rubthru($gtarg, $gsrc, 10, 10, 0, 0, $src_width, $src_height),
"low level with grey target and gray/alpha source");
$c = Imager::i_get_pixel($gtarg, 10, 10);
ok($c, "get pixel at 10, 10");
is(($c->rgba)[0], 0, "check grey level");
is((Imager::i_get_pixel($gtarg, 30, 30)->rgba)[0], 128,
"check grey level at 30, 30");
# simple test for 16-bit/sample images
my $targ16 = Imager::i_img_16_new(100, 100, 3);
ok(i_rubthru($targ16, $src, 10, 10, 0, 0, $src_width, $src_height),
"smoke test vs 16-bit/sample image");
$c = Imager::i_get_pixel($targ16, 30, 30);
ok($c, "get pixel at 30, 30");
ok(color_cmp($c, NC(128, 0, 0)) == 0, "check color");
# check the OO interface
my $ootarg = Imager->new(xsize=>100, ysize=>100);
my $oosrc = Imager->new(xsize=>80, ysize=>80, channels=>4);
$oosrc->box(color=>$halfred, xmin=>20, ymin=>20, xmax=>60, ymax=>60,
filled=>1);
ok($ootarg->rubthrough(src=>$oosrc, tx=>10, ty=>10),
"oo rubthrough");
ok(color_cmp(Imager::i_get_pixel($ootarg->{IMG}, 10, 10), NC(0, 0, 0)) == 0,
"check pixel at 10, 10");
ok(color_cmp(Imager::i_get_pixel($ootarg->{IMG}, 30, 30), NC(128, 0, 0)) == 0,
"check pixel at 30, 30");
my $oogtarg = Imager->new(xsize=>100, ysize=>100, channels=>1);
{ # check empty image errors
my $empty = Imager->new;
ok(!$empty->rubthrough(src => $oosrc), "check empty target");
is($empty->errstr, 'empty input image', "check error message");
ok(!$oogtarg->rubthrough(src=>$empty), "check empty source");
is($oogtarg->errstr, 'empty input image for src',
"check error message");
}
{
# alpha source and target
for my $method (qw/rubthrough compose/) {
my $src = Imager->new(xsize => 10, ysize => 1, channels => 4);
my $targ = Imager->new(xsize => 10, ysize => 2, channels => 4);
# simple initialization
$targ->setscanline('y' => 1, x => 1,
pixels =>
[
NC(255, 128, 0, 255),
NC(255, 128, 0, 128),
NC(255, 128, 0, 0),
NC(255, 128, 0, 255),
NC(255, 128, 0, 128),
NC(255, 128, 0, 0),
NC(255, 128, 0, 255),
NC(255, 128, 0, 128),
NC(255, 128, 0, 0),
]);
$src->setscanline('y' => 0,
pixels =>
[
NC(0, 128, 255, 0),
NC(0, 128, 255, 0),
NC(0, 128, 255, 0),
NC(0, 128, 255, 128),
NC(0, 128, 255, 128),
NC(0, 128, 255, 128),
NC(0, 128, 255, 255),
NC(0, 128, 255, 255),
NC(0, 128, 255, 255),
]);
ok($targ->$method(src => $src, combine => 'normal',
tx => 1, ty => 1), "do 4 on 4 $method");
iscolora($targ->getpixel(x => 1, 'y' => 1), NC(255, 128, 0, 255),
"check at zero source coverage on full targ coverage");
iscolora($targ->getpixel(x => 2, 'y' => 1), NC(255, 128, 0, 128),
"check at zero source coverage on half targ coverage");
iscolora($targ->getpixel(x => 3, 'y' => 1), NC(255, 128, 0, 0),
"check at zero source coverage on zero targ coverage");
iscolora($targ->getpixel(x => 4, 'y' => 1), NC(127, 128, 128, 255),
"check at half source_coverage on full targ coverage");
iscolora($targ->getpixel(x => 5, 'y' => 1), NC(85, 128, 170, 191),
"check at half source coverage on half targ coverage");
iscolora($targ->getpixel(x => 6, 'y' => 1), NC(0, 128, 255, 128),
"check at half source coverage on zero targ coverage");
iscolora($targ->getpixel(x => 7, 'y' => 1), NC(0, 128, 255, 255),
"check at full source_coverage on full targ coverage");
iscolora($targ->getpixel(x => 8, 'y' => 1), NC(0, 128, 255, 255),
"check at full source coverage on half targ coverage");
iscolora($targ->getpixel(x => 9, 'y' => 1), NC(0, 128, 255, 255),
"check at full source coverage on zero targ coverage");
}
}
{ # https://rt.cpan.org/Ticket/Display.html?id=30908
# we now adapt the source channels to the target
# check each combination works as expected
# various source images
my $src1 = Imager->new(xsize => 50, ysize => 50, channels => 1);
my $g_grey_full = Imager::Color->new(128, 255, 0, 0);
my $g_white_50 = Imager::Color->new(255, 128, 0, 0);
$src1->box(filled => 1, xmax => 24, color => $g_grey_full);
my $src2 = Imager->new(xsize => 50, ysize => 50, channels => 2);
$src2->box(filled => 1, xmax => 24, color => $g_grey_full);
$src2->box(filled => 1, xmin => 25, color => $g_white_50);
my $c_red_full = Imager::Color->new(255, 0, 0);
my $c_blue_full = Imager::Color->new(0, 0, 255);
my $src3 = Imager->new(xsize => 50, ysize => 50, channels => 3);
$src3->box(filled => 1, xmax => 24, color => $c_red_full);
$src3->box(filled => 1, xmin => 25, color => $c_blue_full);
my $c_green_50 = Imager::Color->new(0, 255, 0, 127);
my $src4 = Imager->new(xsize => 50, ysize => 50, channels => 4);
$src4->box(filled => 1, xmax => 24, color => $c_blue_full);
$src4->box(filled => 1, xmin => 25, color => $c_green_50);
my @left_box = ( box => [ 25, 25, 49, 74 ] );
my @right_box = ( box => [ 50, 25, 74, 74 ] );
{ # 1 channel output
my $base = Imager->new(xsize => 100, ysize => 100, channels => 1);
$base->box(filled => 1, color => Imager::Color->new(64, 255, 0, 0));
my $work = $base->copy;
ok($work->rubthrough(left => 25, top => 25, src => $src1), "rubthrough 1 to 1");
my $comp = $base->copy;
$comp->box(filled => 1, color => $g_grey_full, @left_box);
$comp->box(filled => 1, color => [ 0, 0, 0, 0 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(left => 25, top => 25, src => $src2), "rubthrough 2 to 1");
$comp = $base->copy;
$comp->box(filled => 1, @left_box, color => $g_grey_full);
$comp->box(filled => 1, @right_box, color => [ 159, 0, 0, 0 ]);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(left => 25, top => 25, src => $src3), "rubthrough 3 to 1");
$comp = $base->copy;
$comp->box(filled => 1, @left_box, color => [ 57, 255, 0, 0 ]);
$comp->box(filled => 1, @right_box, color => [ 18, 255, 0, 0 ]);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(left => 25, top => 25, src => $src4), "rubthrough 4 to 1");
$comp = $base->copy;
$comp->box(filled => 1, color => [ 18, 255, 0, 0 ], @left_box);
$comp->box(filled => 1, color => [ 121, 255, 0, 0 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
}
{ # 2 channel output
my $base = Imager->new(xsize => 100, ysize => 100, channels => 2);
$base->box(filled => 1, color => [ 128, 128, 0, 0 ]);
my $work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src1), "rubthrough 1 to 2");
my $comp = $base->copy;
$comp->box(filled => 1, color => $g_grey_full, @left_box);
$comp->box(filled => 1, color => [ 0, 255, 0, 0 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src2), "rubthrough 2 to 2");
$comp = $base->copy;
$comp->box(filled => 1, color => $g_grey_full, @left_box);
$comp->box(filled => 1, color => [ 213, 191, 0, 0 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src3), "rubthrough 3 to 2");
$comp = $base->copy;
$comp->box(filled => 1, color => [ 57, 255, 0, 0 ], @left_box);
$comp->box(filled => 1, color => [ 18, 255, 0, 0 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src4), "rubthrough 4 to 2");
$comp = $base->copy;
$comp->box(filled => 1, color => [ 18, 255, 0, 0 ], @left_box);
$comp->box(filled => 1, color => [ 162, 191, 0, 0 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
}
{ # 3 channel output
my $base = Imager->new(xsize => 100, ysize => 100, channels => 3);
$base->box(filled => 1, color => [ 128, 255, 0, 0 ]);
my $work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src1), "rubthrough 1 to 3");
my $comp = $base->copy;
$comp->box(filled => 1, color => [ 128, 128, 128, 255 ], @left_box);
$comp->box(filled => 1, color => [ 0, 0, 0, 0 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src2), "rubthrough 2 to 3");
$comp = $base->copy;
$comp->box(filled => 1, color => [ 128, 128, 128, 255 ], @left_box);
$comp->box(filled => 1, color => [ 191, 255, 128, 255 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src3), "rubthrough 3 to 3");
$comp = $base->copy;
$comp->box(filled => 1, color => [ 255, 0, 0 ], @left_box);
$comp->box(filled => 1, color => [ 0, 0, 255 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src4), "rubthrough 4 to 3");
$comp = $base->copy;
$comp->box(filled => 1, color => [ 0, 0, 255 ], @left_box);
$comp->box(filled => 1, color => [ 64, 255, 0 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
}
{ # 4 channel output
my $base = Imager->new(xsize => 100, ysize => 100, channels => 4);
$base->box(filled => 1, color => [ 128, 255, 64, 128 ]);
my $work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src1), "rubthrough 1 to 4");
my $comp = $base->copy;
$comp->box(filled => 1, color => [ 128, 128, 128, 255 ], @left_box);
$comp->box(filled => 1, color => [ 0, 0, 0, 255 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src2), "rubthrough 2 to 4");
$comp = $base->copy;
$comp->box(filled => 1, color => [ 128, 128, 128, 255 ], @left_box);
$comp->box(filled => 1, color => [ 213, 255, 192, 191 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src3), "rubthrough 3 to 4");
$comp = $base->copy;
$comp->box(filled => 1, color => [ 255, 0, 0 ], @left_box);
$comp->box(filled => 1, color => [ 0, 0, 255 ], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
$work = $base->copy;
ok($work->rubthrough(top => 25, left => 25, src => $src4), "rubthrough 4 to 4");
$comp = $base->copy;
$comp->box(filled => 1, color => $c_blue_full, @left_box);
$comp->box(filled => 1, color => [ 43, 255, 21, 191], @right_box);
is_image($work, $comp, "compare rubthrough target to expected");
}
}
sub color_cmp {
my ($l, $r) = @_;
my @l = $l->rgba;
my @r = $r->rgba;
print "# (",join(",", @l[0..2]),") <=> (",join(",", @r[0..2]),")\n";
return $l[0] <=> $r[0]
|| $l[1] <=> $r[1]
|| $l[2] <=> $r[2];
}
sub iscolora {
my ($c1, $c2, $msg) = @_;
my $builder = Test::Builder->new;
my @c1 = $c1->rgba;
my @c2 = $c2->rgba;
if (!$builder->ok($c1[0] == $c2[0] && $c1[1] == $c2[1] && $c1[2] == $c2[2]
&& $c1[3] == $c2[3],
$msg)) {
$builder->diag(<<DIAG);
got color: [ @c1 ]
expected color: [ @c2 ]
DIAG
}
}
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