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# t/gd_tests.t - tests functions in the PDL::IO::GD module
# Judd Taylor, USF IMaRS
# 13 March 2003
use strict;
use warnings;
use PDL;
use Test::More;
use Test::PDL;
use File::Temp qw(tempdir);
use PDL::IO::GD;
# Test Files:
my $tempdir = tempdir( CLEANUP=>1 );
my $lutfile = "$tempdir/default.rcols";
my $testfile1 = "$tempdir/test.png";
my $testfile2 = "$tempdir/test_true.png";
my $testfile3 = "$tempdir/test_comp.png";
my $testfile4 = "$tempdir/test_nocomp.png";
# Write out the lutfile below, so we don't have to include it in the distro:
write_lut($lutfile);
my $lut = load_lut( $lutfile );
ok( ($lut->dim(0) == 3 && $lut->dim(1) == 256) );
eval {write_png( sequence(16,16), sequence(255)->dummy(0,3), $testfile1 )};
like $@, qr/exceeded LUT size/, 'too-short LUT throws exception';
my $pdl = sequence(byte, 30, 30);
write_png( $pdl, $lut, $testfile1 );
is_pdl read_png($testfile1), $pdl->long;
eval {read_true_png($testfile1)};
like $@, qr/Tried to read a non-truecolour/, 'right error instead of segfault';
is_pdl read_png_lut( $testfile1 ), $lut;
my $tc_pdl = sequence(byte, 100, 100, 3);
write_true_png( $tc_pdl, $testfile2 );
is_pdl read_true_png( $testfile2 ), $tc_pdl;
$pdl = sequence(byte, 30, 30);
write_png_ex($pdl, $lut, $testfile3, 0);
write_png_ex($pdl, $lut, $testfile3, 9);
write_png_best($pdl, $lut, $testfile3);
$pdl = sequence(100, 100, 3);
write_true_png_ex($pdl, $testfile4, 0);
write_true_png_ex($pdl, $testfile3, 9);
write_true_png_best($pdl, $testfile3 );
recompress_png_best( $testfile3 );
is_pdl read_png( $testfile4 ), read_png( $testfile3 );
done_testing;
sub write_lut {
my $filename = shift;
open my $fh, ">", $filename or die "Can't write $filename: $!\n";
print $fh <<'ENDLUT';
2 0 4
9 0 7
22 0 19
36 0 32
50 0 48
61 0 63
69 0 77
77 0 91
82 0 104
84 0 118
88 0 132
87 0 145
84 0 159
83 0 173
77 0 186
70 0 200
60 0 214
53 0 227
40 0 241
25 0 255
12 0 255
0 4 255
0 21 255
0 38 255
0 55 255
0 72 255
0 89 255
0 106 255
0 119 255
0 135 255
0 152 255
0 165 255
0 187 255
0 195 255
0 203 255
0 208 255
0 220 255
0 225 255
0 233 255
0 242 255
0 250 255
0 255 255
0 255 242
0 255 238
0 255 225
0 255 220
0 255 212
0 255 203
0 255 195
0 255 187
0 255 174
0 255 165
0 255 152
0 255 144
0 255 131
0 255 114
0 255 102
0 255 84
0 255 67
0 255 55
0 255 38
0 255 21
0 255 8
8 255 0
25 255 0
42 255 0
55 255 0
76 255 0
97 255 0
119 255 0
140 255 0
161 255 0
182 255 0
203 255 0
225 255 0
246 255 0
255 242 0
255 242 0
255 242 0
255 242 0
255 238 0
255 238 0
255 238 0
255 233 0
255 233 0
255 233 0
255 233 0
255 229 0
255 229 0
255 229 0
255 221 0
255 221 0
255 221 0
255 221 0
255 216 0
255 216 0
255 216 0
255 212 0
255 212 0
255 212 0
255 208 0
255 208 0
255 199 0
255 199 0
255 199 0
255 195 0
255 195 0
255 191 0
255 191 0
255 191 0
255 187 0
255 187 0
255 178 0
255 178 0
255 178 0
255 174 0
255 174 0
255 170 0
255 170 0
255 165 0
255 165 0
255 165 0
255 161 0
255 161 0
255 153 0
255 153 0
255 153 0
255 148 0
255 148 0
255 144 0
255 144 0
255 144 0
255 140 0
255 140 0
255 131 0
255 131 0
255 127 0
255 127 0
255 127 0
255 123 0
255 123 0
255 123 0
255 119 0
255 119 0
255 110 0
255 110 0
255 110 0
255 106 0
255 106 0
255 106 0
255 102 0
255 102 0
255 97 0
255 97 0
255 97 0
255 89 0
255 89 0
255 85 0
255 85 0
255 85 0
255 80 0
255 80 0
255 76 0
255 76 0
255 72 0
255 72 0
255 72 0
255 63 0
255 63 0
255 59 0
255 59 0
255 55 0
255 55 0
255 51 0
255 51 0
255 42 0
255 42 0
255 38 0
255 38 0
255 34 0
255 34 0
255 29 0
255 29 0
255 21 0
255 21 0
255 17 0
255 17 0
255 17 0
255 17 0
255 17 0
255 17 0
255 17 0
255 17 0
255 12 0
255 12 0
255 12 0
255 12 0
255 12 0
255 12 0
255 12 0
255 12 0
255 8 0
255 8 0
255 8 0
255 8 0
255 8 0
255 8 0
255 8 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 0 0
255 29 0
170 170 170
0 255 0
255 250 0
0 0 0
255 255 255
ENDLUT
} # End of write_lut()...
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