X-Git-Url: http://git.imager.perl.org/imager.git/blobdiff_plain/34b3f7e677dad923311b69d88e176e09686957ff..a6eb1f94b51a50d11ec7435d1a8f680ec4fb8689:/t/t01introvert.t

diff --git a/t/t01introvert.t b/t/t01introvert.t
index e6dce3b6..4a1e4b51 100644
--- a/t/t01introvert.t
+++ b/t/t01introvert.t
@@ -3,22 +3,35 @@
 # to make sure we get expected values
 
 use strict;
-use lib 't';
-use Test::More tests=>95;
+use Test::More tests => 466;
 
 BEGIN { use_ok(Imager => qw(:handy :all)) }
 
-require "t/testtools.pl";
+use Imager::Test qw(image_bounds_checks is_color3 is_color4 is_fcolor4 color_cmp mask_tests is_fcolor3);
 
-init_log("testout/t01introvert.log",1);
+-d "testout" or mkdir "testout";
+
+Imager->open_log(log => "testout/t01introvert.log");
 
 my $im_g = Imager::ImgRaw::new(100, 101, 1);
 
+my $red = NC(255, 0, 0);
+my $green = NC(0, 255, 0);
+my $blue = NC(0, 0, 255);
+
+use Imager::Color::Float;
+my $f_black = Imager::Color::Float->new(0, 0, 0);
+my $f_red = Imager::Color::Float->new(1.0, 0, 0);
+my $f_green = Imager::Color::Float->new(0, 1.0, 0);
+my $f_blue = Imager::Color::Float->new(0, 0, 1.0);
+
 is(Imager::i_img_getchannels($im_g), 1, "1 channel image channel count");
 ok(Imager::i_img_getmask($im_g) & 1, "1 channel image mask");
 ok(!Imager::i_img_virtual($im_g), "1 channel image not virtual");
 is(Imager::i_img_bits($im_g), 8, "1 channel image has 8 bits/sample");
 is(Imager::i_img_type($im_g), 0, "1 channel image is direct");
+is(Imager::i_img_get_width($im_g), 100, "100 pixels wide");
+is(Imager::i_img_get_height($im_g), 101, "101 pixels high");
 
 my @ginfo = Imager::i_img_info($im_g);
 is($ginfo[0], 100, "1 channel image width");
@@ -42,10 +55,6 @@ is(Imager::i_img_getchannels($im_pal), 3, "pal img channel count");
 is(Imager::i_img_bits($im_pal), 8, "pal img bits");
 is(Imager::i_img_type($im_pal), 1, "pal img is paletted");
 
-my $red = NC(255, 0, 0);
-my $green = NC(0, 255, 0);
-my $blue = NC(0, 0, 255);
-
 my $red_idx = check_add($im_pal, $red, 0);
 my $green_idx = check_add($im_pal, $green, 1);
 my $blue_idx = check_add($im_pal, $blue, 2);
@@ -64,21 +73,21 @@ ok(!grep($_ != $red_idx, @pals[0..49]), "check for red");
 ok(!grep($_ != $blue_idx, @pals[50..99]), "check for blue");
 is(Imager::i_gpal($im_pal, 0, 100, 0), "\0" x 50 . "\2" x 50, 
    "gpal in scalar context");
-my @samp = Imager::i_gsamp($im_pal, 0, 100, 0, 0, 1, 2);
+my @samp = Imager::i_gsamp($im_pal, 0, 100, 0, [ 0, 1, 2 ]);
 is(@samp, 300, "gsamp count in list context");
 my @samp_exp = ((255, 0, 0) x 50, (0, 0, 255) x 50);
 is_deeply(\@samp, \@samp_exp, "gsamp list deep compare");
-my $samp = Imager::i_gsamp($im_pal, 0, 100, 0, 0, 1, 2);
+my $samp = Imager::i_gsamp($im_pal, 0, 100, 0, [ 0, 1, 2 ]);
 is(length($samp), 300, "gsamp scalar length");
 is($samp, "\xFF\0\0" x 50 . "\0\0\xFF" x 50, "gsamp scalar bytes");
 
 # reading indicies as colors
 my $c_red = Imager::i_get_pixel($im_pal, 0, 0);
 ok($c_red, "got the red pixel");
-ok(color_cmp($red, $c_red) == 0, "and it's red");
+is_color3($c_red, 255, 0, 0, "and it's red");
 my $c_blue = Imager::i_get_pixel($im_pal, 50, 0);
 ok($c_blue, "got the blue pixel");
-ok(color_cmp($blue, $c_blue) == 0, "and it's blue");
+is_color3($c_blue, 0, 0, 255, "and it's blue");
 
 # drawing with colors
 ok(Imager::i_ppix($im_pal, 0, 0, $green) == 0, "draw with color in palette");
@@ -87,7 +96,7 @@ is(Imager::i_img_type($im_pal), 1, "image still paletted");
 
 my $c_green = Imager::i_get_pixel($im_pal, 0, 0);
 ok($c_green, "got green pixel");
-ok(color_cmp($green, $c_green) == 0, "and it's green");
+is_color3($c_green, 0, 255, 0, "and it's green");
 
 is(Imager::i_colorcount($im_pal), 3, "still 3 colors in palette");
 is(Imager::i_findcolor($im_pal, $green), 1, "and green is the second");
@@ -97,24 +106,51 @@ my $black = NC(0, 0, 0);
 ok(Imager::i_ppix($im_pal, 1, 0, $black) == 0, "draw with black (not in palette)");
 is(Imager::i_img_type($im_pal), 0, "pal img shouldn't be paletted now");
 
-my %quant =
-  (
-   colors => [$red, $green, $blue, $black],
-   makemap => 'none',
-  );
-my $im_pal2 = Imager::i_img_to_pal($im_pal, \%quant);
-ok($im_pal2, "got an image from quantizing");
-is(@{$quant{colors}}, 4, "has the right number of colours");
-is(Imager::i_gsamp($im_pal2, 0, 100, 0, 0, 1, 2),
-  "\0\xFF\0\0\0\0"."\xFF\0\0" x 48 . "\0\0\xFF" x 50,
-   "colors are still correct");
+{
+  my %quant =
+    (
+     colors => [$red, $green, $blue, $black],
+     make_colors => 'none',
+    );
+  my $im_pal2 = Imager::i_img_to_pal($im_pal, \%quant);
+  ok($im_pal2, "got an image from quantizing");
+  is(@{$quant{colors}}, 4, "quant has the right number of colours");
+  is(Imager::i_colorcount($im_pal2), 4, "and so does the image");
+  my @colors = Imager::i_getcolors($im_pal2, 0, 4);
+  my ($first) = Imager::i_getcolors($im_pal2, 0);
+  my @first = $colors[0]->rgba;
+  is_color3($first, $first[0], $first[1], $first[2],
+	   "check first color is first for multiple or single fetch");
+  is_color3($colors[0], 255, 0, 0, "still red");
+  is_color3($colors[1], 0, 255, 0, "still green");
+  is_color3($colors[2], 0, 0, 255, "still blue");
+  is_color3($colors[3], 0, 0, 0, "still black");
+  my @samples = Imager::i_gsamp($im_pal2, 0, 100, 0, [ 0, 1, 2 ]);
+  my @expect = unpack("C*", "\0\xFF\0\0\0\0"."\xFF\0\0" x 48 . "\0\0\xFF" x 50);
+  my $match_list = is_deeply(\@samples, \@expect, "colors are still correct");
+  my $samples = Imager::i_gsamp($im_pal2, 0, 100, 0, [ 0, 1, 2 ]);
+  my $match_scalar = is_deeply([ unpack("C*", $samples) ],
+			       \@expect, "colors are still correct (scalar)");
+  unless ($match_list && $match_scalar) {
+    # this has been failing on a particular smoker, provide more
+    # diagnostic information
+    print STDERR "Pallete:\n";
+    print STDERR "  $_: ", join(",", $colors[$_]->rgba), "\n" for 0..$#colors;
+    print STDERR "Samples (list): ", join(",", @samples), "\n";
+    print STDERR "Samples (scalar): ", join(",", unpack("C*", $samples)), "\n";
+    print STDERR "Indexes: ", join(",", Imager::i_gpal($im_pal2, 0, 100, 0)), "\n";
+  }
+}
 
 # test the OO interfaces
 my $impal2 = Imager->new(type=>'pseudo', xsize=>200, ysize=>201);
-ok($impal2, "make paletted via OO");
+ok($impal2, "make paletted via OO")
+  or diag(Imager->errstr);
 is($impal2->getchannels, 3, "check channels");
 is($impal2->bits, 8, "check bits");
 is($impal2->type, 'paletted', "check type");
+is($impal2->getwidth, 200, "check width");
+is($impal2->getheight, 201, "check height");
 
 {
   my $red_idx = $impal2->addcolors(colors=>[$red]);
@@ -125,7 +161,7 @@ is($impal2->type, 'paletted', "check type");
   is($blue_idx, 1, "and it's expected index for blue");
   my $green_idx = $blue_idx + 1;
   my $c = $impal2->getcolors(start=>$green_idx);
-  ok(color_cmp($green, $c) == 0, "found green where expected");
+  is_color3($c, 0, 255, 0, "found green where expected");
   my @cols = $impal2->getcolors;
   is(@cols, 3, "got 3 colors");
   my @exp = ( $red, $blue, $green );
@@ -144,7 +180,8 @@ is($impal2->type, 'paletted', "check type");
      "we can setcolors");
 
   # make an rgb version
-  my $imrgb2 = $impal2->to_rgb8();
+  my $imrgb2 = $impal2->to_rgb8()
+    or diag($impal2->errstr);
   is($imrgb2->type, 'direct', "converted is direct");
 
   # and back again, specifying the palette
@@ -160,6 +197,47 @@ is($impal2->type, 'paletted', "check type");
   is($impal3->type, 'paletted', "and is paletted");
 }
 
+{
+  my $im = Imager->new;
+  ok($im, "make empty image");
+  ok(!$im->to_rgb8, "convert to rgb8");
+  is($im->errstr, "to_rgb8: empty input image", "check message");
+  is($im->bits, undef, "can't call bits on an empty image");
+  is($im->errstr, "bits: empty input image", "check message");
+  is($im->type, undef, "can't call type on an empty image");
+  is($im->errstr, "type: empty input image", "check message");
+  is($im->virtual, undef, "can't call virtual on an empty image");
+  is($im->errstr, "virtual: empty input image", "check message");
+  is($im->is_bilevel, undef, "can't call virtual on an empty image");
+  is($im->errstr, "is_bilevel: empty input image", "check message");
+  ok(!$im->getscanline(y => 0), "can't call getscanline on an empty image");
+  is($im->errstr, "getscanline: empty input image", "check message");
+  ok(!$im->setscanline(y => 0, pixels => [ $red, $blue ]),
+     "can't call setscanline on an empty image");
+  is($im->errstr, "setscanline: empty input image", "check message");
+  ok(!$im->getsamples(y => 0), "can't call getsamples on an empty image");
+  is($im->errstr, "getsamples: empty input image", "check message");
+  is($im->getwidth, undef, "can't get width of empty image");
+  is($im->errstr, "getwidth: empty input image", "check message");
+  is($im->getheight, undef, "can't get height of empty image");
+  is($im->errstr, "getheight: empty input image", "check message");
+  is($im->getchannels, undef, "can't get channels of empty image");
+  is($im->errstr, "getchannels: empty input image", "check message");
+  is($im->getmask, undef, "can't get mask of empty image");
+  is($im->errstr, "getmask: empty input image", "check message");
+  is($im->setmask, undef, "can't set mask of empty image");
+  is($im->errstr, "setmask: empty input image", "check message");
+}
+
+{ # basic checks, 8-bit direct images
+  my $im = Imager->new(xsize => 2, ysize => 3);
+  ok($im, 'create 8-bit direct image');
+  is($im->bits, 8, '8 bits');
+  ok(!$im->virtual, 'not virtual');
+  is($im->type, 'direct', 'direct image');
+  ok(!$im->is_bilevel, 'not mono');
+}
+
 ok(!Imager->new(xsize=>0, ysize=>1), "fail to create 0 height image");
 cmp_ok(Imager->errstr, '=~', qr/Image sizes must be positive/,
        "0 height error message check");
@@ -195,7 +273,7 @@ cmp_ok(Imager->errstr, '=~', qr/channels must be between 1 and 4/,
  SKIP:
   {
     use Config;
-    skip("don't want to allocate 4Gb", 8) unless $Config{intsize} == 4;
+    skip("don't want to allocate 4Gb", 8) unless $Config{ptrsize} == 4;
 
     my $uint_range = 256 ** $Config{intsize};
     print "# range $uint_range\n";
@@ -244,6 +322,809 @@ cmp_ok(Imager->errstr, '=~', qr/channels must be between 1 and 4/,
   cmp_ok($warning, '=~', 't01introvert\\.t', "correct file");
 }
 
+{ # http://rt.cpan.org/NoAuth/Bug.html?id=11860
+  my $im = Imager->new(xsize=>2, ysize=>2);
+  $im->setpixel(x=>0, 'y'=>0, color=>$red);
+  $im->setpixel(x=>1, 'y'=>0, color=>$blue);
+
+  my @row = Imager::i_glin($im->{IMG}, 0, 2, 0);
+  is(@row, 2, "got 2 pixels from i_glin");
+  is_color3($row[0], 255, 0, 0, "red first");
+  is_color3($row[1], 0, 0, 255, "then blue");
+}
+
+{ # general tag tests
+  
+  # we don't care much about the image itself
+  my $im = Imager::ImgRaw::new(10, 10, 1);
+
+  ok(Imager::i_tags_addn($im, 'alpha', 0, 101), "i_tags_addn(...alpha, 0, 101)");
+  ok(Imager::i_tags_addn($im, undef, 99, 102), "i_tags_addn(...undef, 99, 102)");
+  is(Imager::i_tags_count($im), 2, "should have 2 tags");
+  ok(Imager::i_tags_addn($im, undef, 99, 103), "i_tags_addn(...undef, 99, 103)");
+  is(Imager::i_tags_count($im), 3, "should have 3 tags, despite the dupe");
+  is(Imager::i_tags_find($im, 'alpha', 0), '0 but true', "find alpha");
+  is(Imager::i_tags_findn($im, 99, 0), 1, "find 99");
+  is(Imager::i_tags_findn($im, 99, 2), 2, "find 99 again");
+  is(Imager::i_tags_get($im, 0), 101, "check first");
+  is(Imager::i_tags_get($im, 1), 102, "check second");
+  is(Imager::i_tags_get($im, 2), 103, "check third");
+
+  ok(Imager::i_tags_add($im, 'beta', 0, "hello", 0), 
+     "add string with string key");
+  ok(Imager::i_tags_add($im, 'gamma', 0, "goodbye", 0),
+     "add another one");
+  ok(Imager::i_tags_add($im, undef, 199, "aloha", 0),
+     "add one keyed by number");
+  is(Imager::i_tags_find($im, 'beta', 0), 3, "find beta");
+  is(Imager::i_tags_find($im, 'gamma', 0), 4, "find gamma");
+  is(Imager::i_tags_findn($im, 199, 0), 5, "find 199");
+  ok(Imager::i_tags_delete($im, 2), "delete");
+  is(Imager::i_tags_find($im, 'beta', 0), 2, 'find beta after deletion');
+  ok(Imager::i_tags_delbyname($im, 'beta'), 'delete beta by name');
+  is(Imager::i_tags_find($im, 'beta', 0), undef, 'beta not there now');
+  is(Imager::i_tags_get_string($im, "gamma"), "goodbye", 
+     'i_tags_get_string() on a string');
+  is(Imager::i_tags_get_string($im, 99), 102, 
+     'i_tags_get_string() on a number entry');
+  ok(Imager::i_tags_delbycode($im, 99), 'delete by code');
+  is(Imager::i_tags_findn($im, 99, 0), undef, '99 not there now');
+  is(Imager::i_tags_count($im), 3, 'final count of 3');
+}
+
+{ 
+  print "# low-level scan line function tests\n";
+  my $im = Imager::ImgRaw::new(10, 10, 4);
+  Imager::i_ppix($im, 5, 0, $red);
+
+  # i_glin/i_glinf
+  my @colors = Imager::i_glin($im, 0, 10, 0);
+  is_deeply([ (0) x 20, (255, 0, 0, 255), (0) x 16 ], 
+	    [ map $_->rgba, @colors ],
+	    "i_glin - list context");
+  my $colors = Imager::i_glin($im, 0, 10, 0);
+  is("00" x 20 . "FF0000FF" . "00" x 16, 
+     uc unpack("H*", $colors), "i_glin - scalar context");
+  my @fcolors = Imager::i_glinf($im, 0, 10, 0);
+  is_deeply([ (0.0) x 20, (1.0, 0, 0, 1.0) , (0) x 16 ],
+	    [ map $_->rgba, @fcolors ],
+	    "i_glinf - list context");
+  my $fcolors = Imager::i_glinf($im, 0, 10, 0);
+  is_deeply([ (0.0) x 20, (1.0, 0, 0, 1.0) , (0) x 16 ],
+	    [ unpack "d*", $fcolors ],
+	    "i_glinf - scalar context");
+
+  # i_plin/i_plinf
+  my @plin_colors = (($black) x 4, $red, $blue, ($black) x 4);
+  is(Imager::i_plin($im, 0, 1, @plin_colors),
+     10, "i_plin - pass in a list");
+  # make sure we get it back
+  is_deeply([ map [ $_->rgba ], @plin_colors ],
+	    [ map [ $_->rgba ], Imager::i_glin($im, 0, 10, 1) ],
+	    "check i_plin wrote to the image");
+  my @scalar_plin = 
+    (
+     (0,0,0,0) x 4, 
+     (0, 255, 0, 255),
+     (0, 0, 255, 255), 
+     (0, 0, 0, 0) x 4,
+    );
+  is(Imager::i_plin($im, 0, 2, pack("C*", @scalar_plin)),
+     10, "i_plin - pass in a scalar");
+  is_deeply(\@scalar_plin,
+	    [ map $_->rgba , Imager::i_glin($im, 0, 10, 2) ],
+	    "check i_plin scalar wrote to the image");
+
+  my @plinf_colors = # Note: only 9 pixels
+    ( 
+     ($f_blue) x 4, 
+     $f_red, 
+     ($f_black) x 3, 
+     $f_black
+    );
+  is(Imager::i_plinf($im, 0, 3, @plinf_colors), 9,
+     "i_plinf - list");
+  is_deeply([ map $_->rgba, Imager::i_glinf($im, 0, 9, 3) ],
+	    [ map $_->rgba, @plinf_colors ],
+	    "check colors were written");
+  my @scalar_plinf =
+    (
+     ( 1.0, 1.0,   0, 1.0 ) x 3,
+     (   0, 1.0, 1.0, 1.0 ) x 2,
+     (   0,   0,   0,   0 ),
+     ( 1.0,   0, 1.0, 1.0 ),
+    );
+  is(Imager::i_plinf($im, 2, 4, pack("d*", @scalar_plinf)),
+     7, "i_plinf - scalar");
+  is_deeply(\@scalar_plinf,
+	    [ map $_->rgba, Imager::i_glinf($im, 2, 9, 4) ],
+	    "check colors were written");
+
+  is_deeply([ Imager::i_gsamp($im, 0, 10, 0, [ 0, 3 ]) ],
+	    [ (0, 0) x 5, (255, 255), (0, 0) x 4 ],
+	    "i_gsamp list context");
+  is("0000" x 5 . "FFFF" . "0000" x 4,
+     uc unpack("H*", Imager::i_gsamp($im, 0, 10, 0, [ 0, 3 ])),
+     "i_gsamp scalar context");
+  is_deeply([ Imager::i_gsampf($im, 2, 9, 4, [ 0, 2, 3 ]) ],
+	    [ (1.0, 0, 1.0) x 3, (0, 1.0, 1.0) x 2, (0, 0, 0),
+	      (1.0, 1.0, 1.0) ], "i_gsampf - list context");
+  is_deeply([ unpack("d*", Imager::i_gsampf($im, 2, 9, 4, [ 0, 2, 3 ])) ],
+	    [ (1.0, 0, 1.0) x 3, (0, 1.0, 1.0) x 2, (0, 0, 0),
+              (1.0, 1.0, 1.0) ], "i_gsampf - scalar context");
+  print "# end low-level scan-line function tests\n";
+}
+
+my $psamp_outside_error = "Image position outside of image";
+{ # psamp
+  print "# psamp\n";
+  my $imraw = Imager::ImgRaw::new(10, 20, 3);
+  {
+    is(Imager::i_psamp($imraw, 0, 2, undef, [ 255, 128, 64 ]), 3,
+       "i_psamp def channels, 3 samples");
+    is_color3(Imager::i_get_pixel($imraw, 0, 2), 255, 128, 64,
+	      "check color written");
+    Imager::i_img_setmask($imraw, 5);
+    is(Imager::i_psamp($imraw, 1, 3, undef, [ 64, 128, 192 ]), 3,
+       "i_psamp def channels, 3 samples, masked");
+    is_color3(Imager::i_get_pixel($imraw, 1, 3), 64, 0, 192,
+	      "check color written");
+    is(Imager::i_psamp($imraw, 1, 7, [ 0, 1, 2 ], [ 64, 128, 192 ]), 3,
+       "i_psamp channels listed, 3 samples, masked");
+    is_color3(Imager::i_get_pixel($imraw, 1, 7), 64, 0, 192,
+	      "check color written");
+    Imager::i_img_setmask($imraw, ~0);
+    is(Imager::i_psamp($imraw, 2, 4, [ 0, 1 ], [ 255, 128, 64, 32 ]), 4,
+       "i_psamp channels [0, 1], 4 samples");
+    is_color3(Imager::i_get_pixel($imraw, 2, 4), 255, 128, 0,
+	      "check first color written");
+    is_color3(Imager::i_get_pixel($imraw, 3, 4), 64, 32, 0,
+	      "check second color written");
+    is(Imager::i_psamp($imraw, 0, 5, [ 0, 1, 2 ], [ (128, 63, 32) x 10 ]), 30,
+       "write a full row");
+    is_deeply([ Imager::i_gsamp($imraw, 0, 10, 5, [ 0, 1, 2 ]) ],
+	      [ (128, 63, 32) x 10 ],
+	      "check full row");
+    is(Imager::i_psamp($imraw, 8, 8, [ 0, 1, 2 ],
+		       [ 255, 128, 32, 64, 32, 16, 32, 16, 8 ]),
+       6, "i_psamp channels [0, 1, 2], 9 samples, but room for 6");
+    is(Imager::i_psamp($imraw, 4, 6, undef, [ 0 .. 18 ], 1), 18,
+       "psamp with offset");
+    is_deeply([ Imager::i_gsamp($imraw, 0, 10, 6, undef) ],
+	      [ (0) x 12, 1 .. 18 ],
+	      "check result");
+    is(Imager::i_psamp($imraw, 4, 11, undef, [ 0 .. 18 ], 1, 3), 9,
+       "psamp with offset and width");
+    is_deeply([ Imager::i_gsamp($imraw, 0, 10, 11, undef) ],
+	      [ (0) x 12, 1 .. 9, (0) x 9 ],
+	      "check result");
+  }
+  { # errors we catch
+    is(Imager::i_psamp($imraw, 6, 8, [ 0, 1, 3 ], [ 255, 128, 32 ]),
+       undef, "i_psamp channels [0, 1, 3], 3 samples (invalid channel number)");
+    is(_get_error(), "No channel 3 in this image",
+       "check error message");
+    is(Imager::i_psamp($imraw, 6, 8, [ 0, 1, -1 ], [ 255, 128, 32 ]),
+       undef, "i_psamp channels [0, 1, -1], 3 samples (invalid channel number)");
+    is(_get_error(), "No channel -1 in this image",
+       "check error message");
+    is(Imager::i_psamp($imraw, 0, -1, undef, [ 0, 0, 0 ]), undef,
+       "negative y");
+    is(_get_error(), $psamp_outside_error,
+       "check error message");
+    is(Imager::i_psamp($imraw, 0, 20, undef, [ 0, 0, 0 ]), undef,
+       "y overflow");
+    is(_get_error(), $psamp_outside_error,
+       "check error message");
+    is(Imager::i_psamp($imraw, -1, 0, undef, [ 0, 0, 0 ]), undef,
+       "negative x");
+    is(_get_error(), $psamp_outside_error,
+       "check error message");
+    is(Imager::i_psamp($imraw, 10, 0, undef, [ 0, 0, 0 ]), undef,
+       "x overflow");
+    is(_get_error(), $psamp_outside_error,
+       "check error message");
+  }
+  { # test the im_sample_list typemap
+    ok(!eval { Imager::i_psamp($imraw, 9, 9, [ 0 ], undef); 1 },
+       "pass undef as the sample list");
+    like($@, qr/data must be a scalar or an arrayref/,
+	 "check message");
+    ok(!eval { Imager::i_psamp($imraw, 9, 9, [ 0 ], { a => 1 }); 1 },
+       "hashref as the sample list");
+    like($@, qr/data must be a scalar or an arrayref/,
+	 "check message");
+    ok(!eval { Imager::i_psamp($imraw, 9, 9, [ 0 ], []); 1 },
+       "empty sample list");
+    like($@, qr/i_psamp: no samples provided in data/,
+	 "check message");
+    ok(!eval { Imager::i_psamp($imraw, 9, 9, [ 0 ], ""); 1 },
+       "empty scalar sample list");
+    like($@, qr/i_psamp: no samples provided in data/,
+	 "check message");
+
+    # not the typemap
+    is(Imager::i_psamp($imraw, 0, 8, undef, [ (0) x 3 ], -1), undef,
+       "negative offset");
+    is(_get_error(), "offset must be non-negative",
+       "check message");
+
+    is(Imager::i_psamp($imraw, 0, 8, undef, [ (0) x 3 ], 4), undef,
+       "too high offset");
+    is(_get_error(), "offset greater than number of samples supplied",
+       "check message");
+  }
+  print "# end psamp tests\n";
+}
+
+{ # psampf
+  print "# psampf\n";
+  my $imraw = Imager::ImgRaw::new(10, 20, 3);
+  {
+    is(Imager::i_psampf($imraw, 0, 2, undef, [ 1, 0.5, 0.25 ]), 3,
+       "i_psampf def channels, 3 samples");
+    is_color3(Imager::i_get_pixel($imraw, 0, 2), 255, 128, 64,
+	      "check color written");
+    Imager::i_img_setmask($imraw, 5);
+    is(Imager::i_psampf($imraw, 1, 3, undef, [ 0.25, 0.5, 0.75 ]), 3,
+       "i_psampf def channels, 3 samples, masked");
+    is_color3(Imager::i_get_pixel($imraw, 1, 3), 64, 0, 191,
+	      "check color written");
+    is(Imager::i_psampf($imraw, 1, 7, [ 0, 1, 2 ], [ 0.25, 0.5, 0.75 ]), 3,
+       "i_psampf channels listed, 3 samples, masked");
+    is_color3(Imager::i_get_pixel($imraw, 1, 7), 64, 0, 191,
+	      "check color written");
+    Imager::i_img_setmask($imraw, ~0);
+    is(Imager::i_psampf($imraw, 2, 4, [ 0, 1 ], [ 1, 0.5, 0.25, 0.125 ]), 4,
+       "i_psampf channels [0, 1], 4 samples");
+    is_color3(Imager::i_get_pixel($imraw, 2, 4), 255, 128, 0,
+	      "check first color written");
+    is_color3(Imager::i_get_pixel($imraw, 3, 4), 64, 32, 0,
+	      "check second color written");
+    is(Imager::i_psampf($imraw, 0, 5, [ 0, 1, 2 ], [ (0.5, 0.25, 0.125) x 10 ]), 30,
+       "write a full row");
+    is_deeply([ Imager::i_gsamp($imraw, 0, 10, 5, [ 0, 1, 2 ]) ],
+	      [ (128, 64, 32) x 10 ],
+	      "check full row");
+    is(Imager::i_psampf($imraw, 8, 8, [ 0, 1, 2 ],
+			[ 1.0, 0.5, 0.125, 0.25, 0.125, 0.0625, 0.125, 0, 1 ]),
+       6, "i_psampf channels [0, 1, 2], 9 samples, but room for 6");
+    is(Imager::i_psampf($imraw, 4, 6, undef, [ map $_/254.9, 0 .. 18 ], 1), 18,
+       "psampf with offset");
+    is_deeply([ Imager::i_gsamp($imraw, 0, 10, 6, undef) ],
+	      [ (0) x 12, 1 .. 18 ],
+	      "check result");
+    is(Imager::i_psampf($imraw, 4, 11, undef, [ map $_/254.9, 0 .. 18 ], 1, 3), 9,
+       "psampf with offset and width");
+    is_deeply([ Imager::i_gsamp($imraw, 0, 10, 11, undef) ],
+	      [ (0) x 12, 1 .. 9, (0) x 9 ],
+	      "check result");
+  }
+  { # errors we catch
+    is(Imager::i_psampf($imraw, 6, 8, [ 0, 1, 3 ], [ 1, 0.5, 0.125 ]),
+       undef, "i_psampf channels [0, 1, 3], 3 samples (invalid channel number)");
+    is(_get_error(), "No channel 3 in this image",
+       "check error message");
+    is(Imager::i_psampf($imraw, 6, 8, [ 0, 1, -1 ], [ 1, 0.5, 0.125 ]),
+       undef, "i_psampf channels [0, 1, -1], 3 samples (invalid channel number)");
+    is(_get_error(), "No channel -1 in this image",
+       "check error message");
+    is(Imager::i_psampf($imraw, 0, -1, undef, [ 0, 0, 0 ]), undef,
+       "negative y");
+    is(_get_error(), $psamp_outside_error,
+       "check error message");
+    is(Imager::i_psampf($imraw, 0, 20, undef, [ 0, 0, 0 ]), undef,
+       "y overflow");
+    is(_get_error(), $psamp_outside_error,
+       "check error message");
+    is(Imager::i_psampf($imraw, -1, 0, undef, [ 0, 0, 0 ]), undef,
+       "negative x");
+    is(_get_error(), $psamp_outside_error,
+       "check error message");
+    is(Imager::i_psampf($imraw, 10, 0, undef, [ 0, 0, 0 ]), undef,
+       "x overflow");
+    is(_get_error(), $psamp_outside_error,
+       "check error message");
+  }
+  { # test the im_fsample_list typemap
+    ok(!eval { Imager::i_psampf($imraw, 9, 9, [ 0 ], undef); 1 },
+       "pass undef as the sample list");
+    like($@, qr/data must be a scalar or an arrayref/,
+	 "check message");
+    ok(!eval { Imager::i_psampf($imraw, 9, 9, [ 0 ], { a => 1 }); 1 },
+       "hashref as the sample list");
+    like($@, qr/data must be a scalar or an arrayref/,
+	 "check message");
+    ok(!eval { Imager::i_psampf($imraw, 9, 9, [ 0 ], []); 1 },
+       "empty sample list");
+    like($@, qr/i_psampf: no samples provided in data/,
+	 "check message");
+    ok(!eval { Imager::i_psampf($imraw, 9, 9, [ 0 ], ""); 1 },
+       "empty scalar sample list");
+    like($@, qr/i_psampf: no samples provided in data/,
+	 "check message");
+
+    # not the typemap
+    is(Imager::i_psampf($imraw, 0, 8, undef, [ (0) x 3 ], -1), undef,
+       "negative offset");
+    is(_get_error(), "offset must be non-negative",
+       "check message");
+
+    is(Imager::i_psampf($imraw, 0, 8, undef, [ (0) x 3 ], 4), undef,
+       "too high offset");
+    is(_get_error(), "offset greater than number of samples supplied",
+       "check message");
+  }
+  print "# end psampf tests\n";
+}
+
+{
+  print "# OO level scanline function tests\n";
+  my $im = Imager->new(xsize=>10, ysize=>10, channels=>4);
+  $im->setpixel(color=>$red, 'x'=>5, 'y'=>0);
+  ok(!$im->getscanline(), "getscanline() - supply nothing, get nothing");
+  is($im->errstr, "missing y parameter", "check message");
+  is_deeply([ map [ $_->rgba ], $im->getscanline('y'=>0) ],
+	    [ ([ 0,0,0,0]) x 5, [ 255, 0, 0, 255 ], ([ 0,0,0,0]) x 4 ],
+	    "getscanline, list context, default x, width");
+  is_deeply([ map [ $_->rgba ], $im->getscanline('y'=>0, 'x'=>3) ],
+	    [ ([0,0,0,0]) x 2, [ 255, 0, 0, 255 ], ([0,0,0,0]) x 4 ],
+	    "getscanline, list context, default width");
+  is_deeply([ map [ $_->rgba ], $im->getscanline('y'=>0, 'x'=>4, width=>4) ],
+	    [ [0,0,0,0], [ 255, 0, 0, 255 ], ([0,0,0,0]) x 2 ],
+	    "getscanline, list context, no defaults");
+  is(uc unpack("H*",  $im->getscanline('y'=>0)),
+     "00000000" x 5 .  "FF0000FF" . "00000000" x 4,
+     "getscanline, scalar context, default x, width");
+  is_deeply([ map [ $_->rgba ], 
+	      $im->getscanline('y'=>0, 'x'=>4, width=>4, type=>'float') ],
+	    [ [0,0,0,0], [ 1.0, 0, 0, 1.0 ], ([0,0,0,0]) x 2 ],
+	    "getscanline float, list context, no defaults");
+  is_deeply([ unpack "d*",
+	      $im->getscanline('y'=>0, 'x'=>4, width=>4, type=>'float') ],
+	    [ (0,0,0,0), ( 1.0, 0, 0, 1.0 ), (0,0,0,0) x 2 ],
+	    "getscanline float, scalar context, no defaults");
+
+  ok(!$im->getscanline('y'=>0, type=>'invalid'),
+     "check invalid type checking");
+  like($im->errstr, qr/invalid type parameter/, 
+       "check message for invalid type");
+
+  my @plin_colors = (($black) x 4, $red, $blue, ($green) x 4);
+  is($im->setscanline('y'=>1, pixels=>\@plin_colors), 10,
+     "setscanline - arrayref, default x");
+  is_deeply([ map [ $_->rgba ], @plin_colors ],
+	    [ map [ $_->rgba ], $im->getscanline('y'=>1) ],
+	    "check colors were written");
+
+  my @plin_colors2 = ( $green, $red, $blue, $red );
+  is($im->setscanline('y'=>2, 'x'=>3, pixels=>\@plin_colors2), 4,
+     "setscanline - arrayref");
+
+  # using map instead of x here due to a bug in some versions of Test::More
+  # fixed in the latest Test::More
+  is_deeply([ ( map [ 0,0,0,0 ], 1..3), (map [ $_->rgba ], @plin_colors2),
+	      ( map [ 0,0,0,0 ], 1..3) ],
+	    [ map [ $_->rgba ], $im->getscanline('y'=>2) ],
+	    "check write to middle of line");
+  
+  my $raw_colors = pack "H*", "FF00FFFF"."FF0000FF"."FFFFFFFF";
+  is($im->setscanline('y'=>3, 'x'=>2, pixels=>$raw_colors), 3,
+     "setscanline - scalar, default raw type")
+    or print "# ",$im->errstr,"\n";
+  is(uc unpack("H*", $im->getscanline('y'=>3, 'x'=>1, 'width'=>5)),
+     "00000000".uc(unpack "H*", $raw_colors)."00000000",
+     "check write");
+
+  # float colors
+  my @fcolors = ( $f_red, $f_blue, $f_black, $f_green );
+  is($im->setscanline('y'=>4, 'x'=>3, pixels=>\@fcolors), 4,
+     "setscanline - float arrayref");
+  is_deeply([ map [ $_->rgba ], @fcolors ],
+	    [ map [ $_->rgba ], $im->getscanline('y'=>4, 'x'=>3, width=>4, type=>'float') ],
+	    "check write");
+  # packed
+  my $packed_fcolors = pack "d*", map $_->rgba, @fcolors;
+  is($im->setscanline('y'=>5, 'x'=>4, pixels=>$packed_fcolors, type=>'float'), 4,
+     "setscanline - float scalar");
+  is_deeply([ map [ $_->rgba ], @fcolors ],
+	    [ map [ $_->rgba ], $im->getscanline('y'=>5, 'x'=>4, width=>4, type=>'float') ],
+	    "check write");
+
+  # get samples
+  is_deeply([ $im->getsamples('y'=>1, channels=>[ 0 ]) ],
+	    [ map +($_->rgba)[0], @plin_colors ],
+	    "get channel 0, list context, default x, width");
+  is_deeply([ unpack "C*", $im->getsamples('y'=>1, channels=>[0, 2]) ],
+	    [ map { ($_->rgba)[0, 2] } @plin_colors ],
+	    "get channel 0, 1, scalar context");
+  is_deeply([ $im->getsamples('y'=>4, 'x'=>3, width=>4, type=>'float',
+			      channels=>[1,3]) ],
+	    [ map { ($_->rgba)[1,3] } @fcolors ],
+	    "get channels 1,3, list context, float samples");
+  is_deeply([ unpack "d*", 
+	      $im->getsamples('y'=>4, 'x'=>3, width=>4,
+			      type=>'float', channels=>[3,2,1,0]) ],
+	    [ map { ($_->rgba)[3,2,1,0] } @fcolors ],
+	    "get channels 3..0 as scalar, float samples");
+  
+  print "# end OO level scanline function tests\n";
+}
+
+{ # RT 74882
+  # for the non-gsamp_bits case with a target parameter it was
+  # treating the target parameter as a hashref
+  {
+    my $im = Imager->new(xsize => 10, ysize => 10);
+    my $c1 = NC(0, 63, 255);
+    my $c2 = NC(255, 128, 255);
+    is($im->setscanline(y => 1, pixels => [ ( $c1, $c2 ) x 5 ]),
+       10, "set some test data")
+      or diag "setscanline: ", $im->errstr;
+    my @target;
+    is($im->getsamples(y => 1, x => 1, target => \@target, width => 3),
+       9, "getsamples to target");
+    is_deeply(\@target, [ 255, 128, 255, 0, 63, 255, 255, 128, 255 ],
+	      "check result");
+  }
+  {
+    my $im = Imager->new(xsize => 10, ysize => 10, bits => "double");
+    my $c1 = NCF(0, 0.25, 1.0);
+    my $c2 = NCF(1.0, 0.5, 1.0);
+    is($im->setscanline(y => 1, pixels => [ ( $c1, $c2 ) x 5 ]),
+       10, "set some test data")
+      or diag "setscanline: ", $im->errstr;
+    my @target;
+    is($im->getsamples(y => 1, x => 1, target => \@target, width => 3, type => "float"),
+       9, "getsamples to target");
+    is_deeply(\@target, [ 1.0, 0.5, 1.0, 0, 0.25, 1.0, 1.0, 0.5, 1.0 ],
+	      "check result");
+  }
+}
+
+{ # to avoid confusion, i_glin/i_glinf modified to return 0 in unused
+  # channels at the perl level
+  my $im = Imager->new(xsize => 4, ysize => 4, channels => 2);
+  my $fill = Imager::Color->new(128, 255, 0, 0);
+  ok($im->box(filled => 1, color => $fill), 'fill it up');
+  my $data = $im->getscanline('y' => 0);
+  is(unpack("H*", $data), "80ff000080ff000080ff000080ff0000",
+     "check we get zeros");
+  my @colors = $im->getscanline('y' => 0);
+  is_color4($colors[0], 128, 255, 0, 0, "check object interface[0]");
+  is_color4($colors[1], 128, 255, 0, 0, "check object interface[1]");
+  is_color4($colors[2], 128, 255, 0, 0, "check object interface[2]");
+  is_color4($colors[3], 128, 255, 0, 0, "check object interface[3]");
+  
+  my $dataf = $im->getscanline('y' => 0, type => 'float');
+  # the extra pack/unpack is to force double precision rather than long
+  # double, otherwise the test fails
+  is_deeply([ unpack("d*", $dataf) ],
+	    [ unpack("d*", pack("d*", ( 128.0 / 255.0, 1.0, 0, 0, ) x 4)) ],
+	    "check we get zeroes (double)");
+  my @fcolors = $im->getscanline('y' => 0, type => 'float');
+  is_fcolor4($fcolors[0], 128.0/255.0, 1.0, 0, 0, "check object interface[0]");
+  is_fcolor4($fcolors[1], 128.0/255.0, 1.0, 0, 0, "check object interface[1]");
+  is_fcolor4($fcolors[2], 128.0/255.0, 1.0, 0, 0, "check object interface[2]");
+  is_fcolor4($fcolors[3], 128.0/255.0, 1.0, 0, 0, "check object interface[3]");
+}
+
+{ # check the channel mask function
+  
+  my $im = Imager->new(xsize => 10, ysize=>10, bits=>8);
+
+  mask_tests($im, 0.005);
+}
+
+{ # check bounds checking
+  my $im = Imager->new(xsize => 10, ysize => 10);
+
+  image_bounds_checks($im);
+}
+
+{ # setsamples() interface to psamp()
+  my $im = Imager->new(xsize => 10, ysize => 10);
+  is($im->setsamples(y => 1, x => 2, data => [ 1 .. 6 ]), 6,
+     "simple put (array), default channels");
+  is_deeply([ $im->getsamples(y => 1, x => 0) ],
+	    [ (0) x 6, 1 .. 6, (0) x 18 ], "check they were stored");
+  is($im->setsamples(y => 3, x => 3, data => pack("C*", 2 .. 10 )), 9,
+     "simple put (scalar), default channels")
+    or diag $im->errstr;
+  is_deeply([ $im->getsamples(y => 3, x => 0) ],
+	    [ (0) x 9, 2 .. 10, (0) x 12 ], "check they were stored");
+  is($im->setsamples(y => 4, x => 4, data => [ map $_ / 254.5, 1 .. 6 ], type => 'float'),
+     6, "simple put (float array), default channels");
+  is_deeply([ $im->getsamples(y => 4, x => 0) ],
+	    [ (0) x 12, 1 .. 6, (0) x 12 ], "check they were stored");
+
+  is($im->setsamples(y => 5, x => 3, data => pack("d*", map $_ / 254.5, 1 .. 6), type => 'float'),
+     6, "simple put (float scalar), default channels");
+  is_deeply([ $im->getsamples(y => 5, x => 0) ],
+	    [ (0) x 9, 1 .. 6, (0) x 15 ], "check they were stored");
+
+  is($im->setsamples(y => 7, x => 3, data => [ 0 .. 18 ], offset => 1), 18,
+     "setsamples offset");
+  is_deeply([ $im->getsamples(y => 7) ],
+	    [ (0) x 9, 1 .. 18, (0) x 3 ],
+	    "check result");
+
+  is($im->setsamples(y => 8, x => 3, data => [ map $_ / 254.9, 0 .. 18 ],
+		     offset => 1, type => 'float'),
+     18, "setsamples offset (float)");
+  is_deeply([ $im->getsamples(y => 8) ],
+	    [ (0) x 9, 1 .. 18, (0) x 3 ],
+	    "check result");
+
+  is_deeply([ $im->setsamples(y => 6, x => 10, data => [ (0) x 3 ]) ],
+	    [], "check out of range result (8bit)");
+  is($im->errstr, $psamp_outside_error, "check error message");
+
+  is_deeply([ $im->setsamples(y => 6, x => 10, data => [ (0) x 3 ], type => "float") ],
+	    [], "check out of range result (float)");
+  is($im->errstr, $psamp_outside_error, "check error message");
+
+  is_deeply([ $im->setsamples(y => 6, x => 2, channels => [0, 1, 3 ],
+			      data => [ (0) x 3 ]) ],
+	    [], "check bad channels (8bit)");
+  is($im->errstr, "No channel 3 in this image",
+     "check error message");
+  
+  is_deeply([ $im->setsamples(y => 6, x => 2, channels => [0, 1, 3 ], 
+			      data => [ (0) x 3 ], type => "float") ],
+	    [], "check bad channels (float)");
+  is($im->errstr, "No channel 3 in this image",
+     "check error message");
+
+  is($im->setsamples(y => 5, data => [ (0) x 3 ], type => "bad"),
+     undef, "setsamples with bad type");
+  is($im->errstr, "setsamples: type parameter invalid",
+     "check error message");
+  is($im->setsamples(y => 5),
+     undef, "setsamples with no data");
+  is($im->errstr, "setsamples: data parameter missing",
+     "check error message");
+
+  is($im->setsamples(y => 5, data => undef),
+     undef, "setsamples with undef data");
+  is($im->errstr, "setsamples: data parameter not defined",
+     "check error message");
+
+  my $imempty = Imager->new;
+  is($imempty->setsamples(y => 0, data => [ (0) x 3 ]), undef,
+     "setsamples to empty image");
+  is($imempty->errstr, "setsamples: empty input image",
+     "check error message");
+}
+
+{ # getpixel parameters
+  my $im = Imager->new(xsize => 10, ysize => 10);
+  $im->box(filled => 1, xmax => 4, color => NC(255, 0, 0));
+  $im->box(filled => 1, xmin => 5, ymax => 4, color => NC(0, 255, 255));
+  $im->box(filled => 1, xmin => 5, ymin => 5, color => NC(255, 0, 255));
+  { # error handling
+    my $empty = Imager->new;
+    ok(!$empty->getpixel(x => 0, y => 0), "getpixel empty image");
+    is($empty->errstr, "getpixel: empty input image", "check message");
+
+    ok(!$im->getpixel(y => 0), "missing x");
+    is($im->errstr, "getpixel: missing x or y parameter", "check message");
+
+    $im->_set_error("something different");
+    ok(!$im->getpixel(x => 0), "missing y");
+    is($im->errstr, "getpixel: missing x or y parameter", "check message");
+
+    ok(!$im->getpixel(x => [], y => 0), "empty x array ref");
+    is($im->errstr, "getpixel: x is a reference to an empty array",
+       "check message");
+
+    ok(!$im->getpixel(x => 0, y => []), "empty y array ref");
+    is($im->errstr, "getpixel: y is a reference to an empty array",
+       "check message");
+
+    ok(!$im->getpixel(x => 0, y => 0, type => "bad"), "bad type (scalar path)");
+    is($im->errstr, "getpixel: type must be '8bit' or 'float'",
+      "check message");
+
+    $im->_set_error("something different");
+    ok(!$im->getpixel(x => [ 0 ], y => [ 0 ], type => "bad"),
+       "bad type (array path)");
+    is($im->errstr, "getpixel: type must be '8bit' or 'float'",
+      "check message");
+  }
+
+  # simple calls
+  is_color3($im->getpixel(x => 1, y => 0), 255, 0, 0,
+	    "getpixel(1, 0)");
+  is_color3($im->getpixel(x => 8, y => 1), 0, 255, 255,
+	    "getpixel(8, 1)");
+  is_color3($im->getpixel(x => 8, y => 7), 255, 0, 255,
+	    "getpixel(8, 7)");
+
+  {
+    # simple arrayrefs
+    my @colors = $im->getpixel(x => [ 0, 8, 7 ], y => [ 0, 7, 3 ]);
+    is(@colors, 3, "getpixel 2 3 element array refs");
+    is_color3($colors[0], 255, 0, 0, "check first color");
+    is_color3($colors[1], 255, 0, 255, "check second color");
+    is_color3($colors[2], 0, 255, 255, "check third color");
+  }
+  
+  # array and scalar
+  {
+    my @colors = $im->getpixel(x => 5, y => [ 4, 5, 9 ]);
+    is(@colors, 3, "getpixel x scalar, y arrayref of 3");
+    is_color3($colors[0], 0, 255, 255, "check first color");
+    is_color3($colors[1], 255, 0, 255, "check second color");
+    is_color3($colors[2], 255, 0, 255, "check third color");
+  }
+
+  {
+    my @colors = $im->getpixel(x => [ 0, 4, 5 ], y => 2);
+    is(@colors, 3, "getpixel y scalar, x arrayref of 3");
+    is_color3($colors[0], 255, 0, 0, "check first color");
+    is_color3($colors[1], 255, 0, 0, "check second color");
+    is_color3($colors[2], 0, 255, 255, "check third color");
+  }
+
+  { # float
+    is_fcolor3($im->getpixel(x => 1, y => 0, type => 'float'),
+	       1.0, 0, 0, "getpixel(1,0) float");
+    is_fcolor3($im->getpixel(x => 8, y => 1, type => 'float'),
+	       0, 1.0, 1.0, "getpixel(8,1) float");
+    is_fcolor3($im->getpixel(x => 8, y => 7, type => 'float'),
+	       1.0, 0, 1.0, "getpixel(8,7) float");
+
+    my @colors = $im->getpixel(x => [ 0, 8, 7 ], y => [ 0, 7, 3 ], type => 'float');
+    is(@colors, 3, "getpixel 2 3 element array refs (float)");
+    is_fcolor3($colors[0], 1, 0, 0, "check first color");
+    is_fcolor3($colors[1], 1, 0, 1, "check second color");
+    is_fcolor3($colors[2], 0, 1, 1, "check third color");
+  }
+
+  { # out of bounds
+    my @colors = $im->getpixel(x => [ 0, -1, 5, 10 ], y => 0);
+    is(@colors, 4, "should be 4 entries")
+      or diag $im->errstr;
+    is_color3($colors[0], 255, 0, 0, "first red");
+    is($colors[1], undef, "second undef");
+    is_color3($colors[2], 0, 255, 255, "third cyan");
+    is($colors[3], undef, "fourth undef");
+  }
+
+  { # out of bounds
+    my @colors = $im->getpixel(x => [ 0, -1, 5, 10 ], y => 0, type => "float");
+    is(@colors, 4, "should be 4 entries")
+      or diag $im->errstr;
+    is_fcolor3($colors[0], 1.0, 0, 0, "first red");
+    is($colors[1], undef, "second undef");
+    is_fcolor3($colors[2], 0, 1.0, 1.0, "third cyan");
+    is($colors[3], undef, "fourth undef");
+  }
+}
+
+{ # setpixel
+  my $im = Imager->new(xsize => 10, ysize => 10);
+  { # errors
+    my $empty = Imager->new;
+    ok(!$empty->setpixel(x => 0, y => 0, color => $red),
+       "setpixel on empty image");
+    is($empty->errstr, "setpixel: empty input image", "check message");
+
+    ok(!$im->setpixel(y => 0, color => $red), "missing x");
+    is($im->errstr, "setpixel: missing x or y parameter", "check message");
+
+    $im->_set_error("something different");
+    ok(!$im->setpixel(x => 0, color => $red), "missing y");
+    is($im->errstr, "setpixel: missing x or y parameter", "check message");
+
+    ok(!$im->setpixel(x => [], y => 0, color => $red), "empty x array ref");
+    is($im->errstr, "setpixel: x is a reference to an empty array",
+       "check message");
+
+    ok(!$im->setpixel(x => 0, y => [], color => $red), "empty y array ref");
+    is($im->errstr, "setpixel: y is a reference to an empty array",
+       "check message");
+
+    ok(!$im->setpixel(x => 0, y => 0, color => "not really a color"),
+       "color not a color");
+    is($im->errstr, "setpixel: No color named not really a color found",
+       "check message");
+  }
+
+  # simple set
+  is($im->setpixel(x => 0, y => 0, color => $red), $im,
+     "simple setpixel")
+    or diag "simple set float: ", $im->errstr;
+  is_color3($im->getpixel(x => 0, y => 0), 255, 0, 0, "check stored pixel");
+
+  is($im->setpixel(x => 1, y => 2, color => $f_red), $im,
+     "simple setpixel (float)")
+    or diag "simple set float: ", $im->errstr;
+  is_color3($im->getpixel(x => 1, y => 2), 255, 0, 0, "check stored pixel");
+
+  is($im->setpixel(x => -1, y => 0, color => $red), undef,
+     "simple setpixel outside of image");
+  is($im->setpixel(x => 0, y => -1, color => $f_red), undef,
+     "simple setpixel (float) outside of image");
+
+  # simple arrayrefs
+  is($im->setpixel( x => [ 0, 8, 7 ], y => [ 0, 7, 3 ], color => $blue),
+     3, "setpixel with 3 element array refs");
+  my @colors = $im->getpixel(x => [ 8, 7, 0 ], y => [ 7, 3, 0 ]);
+  is_color3($colors[0], 0, 0, 255, "check first color");
+  is_color3($colors[1], 0, 0, 255, "check second color");
+  is_color3($colors[2], 0, 0, 255, "check third color");
+
+  # array and scalar
+  {
+    is($im->setpixel(x => 5, y => [ 4, 5, 9 ], color => $green), 3,
+       "setpixel with x scalar, y arrayref of 3");
+    my @colors = $im->getpixel(x => [ 5, 5, 5 ], y => [ 4, 5, 9 ]);
+    is_color3($colors[0], 0, 255, 0, "check first color");
+    is_color3($colors[1], 0, 255, 0, "check second color");
+    is_color3($colors[2], 0, 255, 0, "check third color");
+  }
+
+  {
+    is($im->setpixel(x => [ 0, 4, 5 ], y => 2, color => $blue), 3,
+       "setpixel with y scalar, x arrayref of 3");
+    my @colors = $im->getpixel(x => [ 0, 4, 5 ], y => [ 2, 2, 2 ]);
+    is_color3($colors[0], 0, 0, 255, "check first color");
+    is_color3($colors[1], 0, 0, 255, "check second color");
+    is_color3($colors[2], 0, 0, 255, "check third color");
+  }
+
+  {
+    is($im->setpixel(x => [ 0, -1, 10, 5, 0 ], y => [ 0, 1, 2, 3, 1 ], color => $blue), 3,
+       "set array with two bad locations")
+      or diag "set array bad locations: ", $im->errstr;
+    my @colors = $im->getpixel(x => [ 0, 5, 0 ], y => [ 0, 3, 1 ]);
+    is_color3($colors[0], 0, 0, 255, "check first color");
+    is_color3($colors[1], 0, 0, 255, "check second color");
+    is_color3($colors[2], 0, 0, 255, "check third color");
+  }
+  {
+    is($im->setpixel(x => [ 0, -1, 10, 5, 0 ], y => [ 0, 1, 2, 3, 1 ], color => $f_green), 3,
+       "set array with two bad locations (float)")
+      or diag "set array bad locations (float): ", $im->errstr;
+    my @colors = $im->getpixel(x => [ 0, 5, 0 ], y => [ 0, 3, 1 ]);
+    is_color3($colors[0], 0, 255, 0, "check first color");
+    is_color3($colors[1], 0, 255, 0, "check second color");
+    is_color3($colors[2], 0, 255, 0, "check third color");
+  }
+  { # default color
+    is($im->setpixel(x => 0, y => 9), $im, "setpixel() default color")
+      or diag "setpixel default color: ", $im->errstr;
+    is_color3($im->getpixel(x => 0, y => 9), 255, 255, 255,
+	      "check color set");
+  }
+}
+
+{
+  my $empty = Imager->new;
+  ok(!$empty->addtag(name => "foo", value => 1),
+     "can't addtag on an empty image");
+  is($empty->errstr, "addtag: empty input image",
+    "check error message");
+  ok(!$empty->settag(name => "foo", value => 1),
+     "can't settag on an empty image");
+  is($empty->errstr, "settag: empty input image",
+    "check error message");
+  ok(!$empty->deltag(name => "foo"), "can't deltag on an empty image");
+  is($empty->errstr, "deltag: empty input image",
+     "check error message");
+  ok(!$empty->tags(name => "foo"), "can't tags on an empty image");
+  is($empty->errstr, "tags: empty input image",
+     "check error message");
+}
+
+Imager->close_log();
+
+unless ($ENV{IMAGER_KEEP_FILES}) {
+  unlink "testout/t01introvert.log";
+}
+
 sub check_add {
   my ($im, $color, $expected) = @_;
   my $index = Imager::i_addcolors($im, $color);
@@ -257,15 +1138,6 @@ sub check_add {
   $index;
 }
 
-sub color_cmp {
-  my ($l, $r) = @_;
-  my @l = $l->rgba;
-  my @r = $r->rgba;
-  return $l[0] <=> $r[0]
-    || $l[1] <=> $r[1]
-      || $l[2] <=> $r[2];
-}
-
 # sub array_ncmp {
 #   my ($a1, $a2) = @_;
 #   my $len = @$a1 < @$a2 ? @$a1 : @$a2;
@@ -281,3 +1153,8 @@ sub dump_colors {
     print "# ", map(sprintf("%02X", $_), ($col->rgba)[0..2]),"\n";
   }
 }
+
+sub _get_error {
+  my @errors = Imager::i_errors();
+  return join(": ", map $_->[0], @errors);
+}