4 use Test::More tests => 13;
5 # Before `make install' is performed this script should be runnable with
6 # `make test'. After `make install' it should work as `perl test.pl'
8 ######################### We start with some black magic to print on failure.
10 # Change 1..1 below to 1..last_test_to_print .
11 # (It may become useful if the test is moved to ./t subdirectory.)
12 use lib qw(blib/lib blib/arch);
14 BEGIN { require 't/testtools.pl'; }
15 BEGIN { use_ok('Imager', ':all') }
16 init_log("testout/t102png.log",1);
18 i_has_format("png") && print "# has png\n";
20 my $green = i_color_new(0, 255, 0, 255);
21 my $blue = i_color_new(0, 0, 255, 255);
22 my $red = i_color_new(255, 0, 0, 255);
24 my $img = Imager::ImgRaw::new(150, 150, 3);
26 i_box_filled($img, 70, 25, 130, 125, $green);
27 i_box_filled($img, 20, 25, 80, 125, $blue);
28 i_arc($img, 75, 75, 30, 0, 361, $red);
29 i_conv($img,[0.1, 0.2, 0.4, 0.2, 0.1]);
31 my $timg = Imager::ImgRaw::new(20, 20, 4);
32 my $trans = i_color_new(255, 0, 0, 127);
33 i_box_filled($timg, 0, 0, 20, 20, $green);
34 i_box_filled($timg, 2, 2, 18, 18, $trans);
36 if (!i_has_format("png")) {
40 ok(!$im->read(file=>"testimg/palette.png"), "should fail to read png");
41 is($im->errstr, "format 'png' not supported", "check no png message");
42 $im = Imager->new(xsize=>2, ysize=>2);
43 ok(!$im->write(file=>"testout/nopng.png"), "should fail to write png");
44 is($im->errstr, 'format not supported', "check no png message");
45 skip("no png support", 8);
48 Imager::i_tags_add($img, "i_xres", 0, "300", 0);
49 Imager::i_tags_add($img, "i_yres", 0, undef, 200);
50 # the following confuses the GIMP
51 #Imager::i_tags_add($img, "i_aspect_only", 0, undef, 1);
52 open(FH,">testout/t102.png") || die "cannot open testout/t102.png for writing\n";
54 my $IO = Imager::io_new_fd(fileno(FH));
55 ok(i_writepng_wiol($img, $IO), "write");
58 open(FH,"testout/t102.png") || die "cannot open testout/t102.png\n";
60 $IO = Imager::io_new_fd(fileno(FH));
61 my $cmpimg = i_readpng_wiol($IO, -1);
63 ok($cmpimg, "read png");
65 print "# png average mean square pixel difference: ",sqrt(i_img_diff($img,$cmpimg))/150*150,"\n";
66 is(i_img_diff($img, $cmpimg), 0, "compare saved and original images");
68 my %tags = map { Imager::i_tags_get($cmpimg, $_) }
69 0..Imager::i_tags_count($cmpimg) - 1;
70 ok(abs($tags{i_xres} - 300) < 1, "i_xres: $tags{i_xres}");
71 ok(abs($tags{i_yres} - 200) < 1, "i_yres: $tags{i_yres}");
72 is($tags{i_format}, "png", "i_format: $tags{i_format}");
74 open FH, "> testout/t102_trans.png"
75 or die "Cannot open testout/t102_trans.png: $!";
77 $IO = Imager::io_new_fd(fileno(FH));
78 ok(i_writepng_wiol($timg, $IO), "write tranparent");
81 open FH,"testout/t102_trans.png"
82 or die "cannot open testout/t102_trans.png\n";
84 $IO = Imager::io_new_fd(fileno(FH));
85 $cmpimg = i_readpng_wiol($IO, -1);
86 ok($cmpimg, "read transparent");
89 print "# png average mean square pixel difference: ",sqrt(i_img_diff($timg,$cmpimg))/150*150,"\n";
90 is(i_img_diff($timg, $cmpimg), 0, "compare saved and original transparent");
93 # png.c 1.1 would produce an incorrect image when loading images with
94 # less than 8 bits/pixel with a transparent palette entry
95 open FH, "< testimg/palette.png"
96 or die "cannot open testimg/palette.png: $!\n";
98 $IO = Imager::io_new_fd(fileno(FH));
99 # 1.1 may segfault here (it does with libefence)
100 my $pimg = i_readpng_wiol($IO,-1);
101 ok($pimg, "read transparent paletted image");
104 open FH, "< testimg/palette_out.png"
105 or die "cannot open testimg/palette_out.png: $!\n";
107 $IO = Imager::io_new_fd(fileno(FH));
108 my $poimg = i_readpng_wiol($IO, -1);
109 ok($poimg, "read palette_out image");
111 if (!is(i_img_diff($pimg, $poimg), 0, "images the same")) {
113 # this tests a bug in Imager's png.c v1.1
114 # if also tickles a bug in libpng before 1.0.5, so you may need to