extracted png tests from t10formats.t and adjusted tests slightly

diff --git a/t/t102png.t b/t/t102png.t
new file mode 100644 (file)
index 0000000..f868b84
--- /dev/null
+++ b/t/t102png.t
@@ -0,0 +1,82 @@
+# Before `make install' is performed this script should be runnable with
+# `make test'. After `make install' it should work as `perl test.pl'
+
+######################### We start with some black magic to print on failure.
+
+# Change 1..1 below to 1..last_test_to_print .
+# (It may become useful if the test is moved to ./t subdirectory.)
+use lib qw(blib/lib blib/arch);
+
+BEGIN { $| = 1; print "1..7\n"; }
+END {print "not ok 1\n" unless $loaded;}
+use Imager qw(:all);
+
+$loaded = 1;
+print "ok 1\n";
+
+init_log("testout/t10formats.log",1);
+
+i_has_format("png") && print "# has png\n";
+
+$green=i_color_new(0,255,0,255);
+$blue=i_color_new(0,0,255,255);
+$red=i_color_new(255,0,0,255);
+
+$img=Imager::ImgRaw::new(150,150,3);
+$cmpimg=Imager::ImgRaw::new(150,150,3);
+
+i_box_filled($img,70,25,130,125,$green);
+i_box_filled($img,20,25,80,125,$blue);
+i_arc($img,75,75,30,0,361,$red);
+i_conv($img,[0.1, 0.2, 0.4, 0.2, 0.1]);
+
+my $timg = Imager::ImgRaw::new(20, 20, 4);
+my $trans = i_color_new(255, 0, 0, 127);
+i_box_filled($timg, 0, 0, 20, 20, $green);
+i_box_filled($timg, 2, 2, 18, 18, $trans);
+
+if (!i_has_format("png")) {
+  print "ok 2 # skip no png support\n";
+  print "ok 3 # skip no png support\n";
+  print "ok 4 # skip no png support\n";
+  print "ok 5 # skip no png support\n";
+} else {
+  open(FH,">testout/t12.png") || die "cannot open testout/t12.png for writing\n";
+  binmode(FH);
+  i_writepng($img,fileno(FH)) || print "not ";
+  close(FH);
+
+  print "ok 2\n";
+
+  open(FH,"testout/t12.png") || die "cannot open testout/t12.png\n";
+  binmode(FH);
+  $cmpimg=i_readpng(fileno(FH)) || print "not ";
+  close(FH);
+
+  print "ok 3\n";
+  print "# png average mean square pixel difference: ",sqrt(i_img_diff($img,$cmpimg))/150*150,"\n";
+  print i_img_diff($img, $cmpimg) 
+       ? "not ok 4 # saved image different\n" : "ok 4\n";
+
+  open FH, "> testout/t12_trans.png" 
+    or die "Cannot open testout/t12_trans.png: $!";
+  binmode FH;
+  if (i_writepng($timg, fileno(FH))) {
+    print "ok 5\n";
+  }
+  else {
+    print "ok 5 # skip - png transparency not yet implemented\n";
+  }
+  close FH;
+
+  open FH,"testout/t12_trans.png" 
+    or die "cannot open testout/t12_trans.png\n";
+  binmode(FH);
+  $cmpimg=i_readpng(fileno(FH)) || print "not ";
+  close(FH);
+
+  print "ok 6\n";
+  print "# png average mean square pixel difference: ",sqrt(i_img_diff($timg,$cmpimg))/150*150,"\n";
+  print i_img_diff($timg, $cmpimg) 
+       ? "not ok 7 # saved image different\n" : "ok 7\n";
+}