/usr/share/perl5/SVG/Graph/Glyph/heatmap.pm is in libsvg-graph-perl 0.02-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 | package SVG::Graph::Glyph::heatmap;
use base SVG::Graph::Glyph;
use strict;
=head1 NAME
SVG::Graph::Glyph::heatmap - SVG::Graph::Glyph::heatmap object
=head1 METHODS
=head2 draw
Title : draw
Usage :
Function:
Example :
Returns :
Args :
=cut
sub draw{
my ($self,@args) = @_;
my $id = 'n'.sprintf("%07d",int(rand(9999999)));
# my $frame_transform = $self->frame_transform;
my $group = $self->svg->group(id=>"heatmap$id");
my $xscale = $self->xsize / $self->group->xrange;
my $yscale = $self->ysize / $self->group->yrange;
my($x1,$x2,$y1,$y2);
my @data = sort {$a->x <=> $b->x} $self->group->data;
my %datum = ();
foreach my $datum ($self->group->data){
$datum{$datum->x}{$datum->y} = $datum->z;
}
my %x = map {$_->x => 1} $self->group->data;
my %y = map {$_->y => 1} $self->group->data;
my @x = sort {$a<=>$b} keys %x;
my @y = sort {$a<=>$b} keys %y;
# my $zmean = $self->group->zmean;
my $zmean = $self->group->zmean;
my $zmax = $self->group->zmax;
my $zmin = $self->group->zmin;
#$zmean = ($zmean - $zmin) / ($zmax - $zmin);
$zmean = 0.5;
my($xdim,$ydim);
for(my $i = 1 ; $i <= $#x + 1; $i++){
$x1 = $x[$i-1];
$x2 = $x[$i];
$x1 = (($x1 - $self->group->xmin) * $xscale) + $self->xoffset;
$x2 = (($x2 - $self->group->xmin) * $xscale) + $self->xoffset;
$xdim ||= abs($x2-$x1);
for(my $j = 1 ; $j <= $#y + 1; $j++){
$y1 = $y[$j-1];
$y2 = $y[$j];
$y1 = ($self->ysize - ($y1 - $self->group->ymin) * $yscale) + $self->yoffset;
$y2 = ($self->ysize - ($y2 - $self->group->ymin) * $yscale) + $self->yoffset;
$ydim ||= abs($y2-$y1);
my $z = $datum{$x[$i-1]}{$y[$j-1]};
#$z = $zmean;
if(defined $z){
#my $zval = ($z - $zmean) / $zmean; #($zmax - $zmean);
my $zval = ($z - $zmin)/ ($zmax-$zmin);
my $zfp = ($zval - 0.5) / 0.5;
my $zfm = (0.5 - $zval) / 0.5;
#my $zval = $z;
#warn "$zval $zfp $zfm $zmean $zmin $zmax";
my($rm,$gm,$bm) = ($self->rgb_m->[0] , $self->rgb_m->[1] , $self->rgb_m->[2]);
#my($rm, $gm,$bm) = (0,0,0);
# 255, -255, 0
my($rhd,$ghd,$bhd) = ($self->rgb_h->[0] - $self->rgb_m->[0] , $self->rgb_h->[1] - $self->rgb_m->[1] , $self->rgb_h->[2] - $self->rgb_m->[2]);
# 0, -255, 255
my($rld,$gld,$bld) = ($self->rgb_l->[0] - $self->rgb_m->[0] , $self->rgb_l->[1] - $self->rgb_m->[1] , $self->rgb_l->[2] - $self->rgb_m->[2]);
my($r, $g, $b) = (0, 0, 0);
#warn "$rld $gld $bld";
#if value above mean and red high brighter than red mean
if($zval > $zmean && $rhd > 0){
$r = int($rm + ($rhd * $zfp));
} elsif($zval > $zmean && $rhd < 0){
$r = int($rm + ($rhd * $zfp));
}
if($zval < $zmean && $rld > 0){
$r = int($rm + ($rld * $zfm));
} elsif($zval < $zmean && $rld < 0) {
$r = int($rm + ($rld * $zfm));
}
#if value above mean and green high brighter than green mean
if($zval > $zmean && $ghd > 0){
$g = int($gm + ($ghd * $zfp));
} elsif($zval > $zmean && $ghd < 0){
$g = int($gm + ($ghd * $zfp));
}
if($zval < $zmean && $gld > 0){
$g = int($gm + ($gld * $zfm));
} elsif($zval < $zmean && $gld < 0) {
$g = int($gm + ($gld * $zfm));
}
#if value above mean and blue high brighter than blue mean
if($zval > $zmean && $bhd > 0){
$b = int($bm + ($bhd * $zfp));
} elsif($zval > $zmean && $bhd < 0){
$b = int($bm + ($bhd * $zfp));
}
if($zval < $zmean && $bld > 0){
$b = int($bm + ($bld * $zfm));
} elsif($zval < $zmean && $bld < 0) {
$b = int($bm + ($bld * $zfm));
}
#if($zval == $zmean) {
# $r = int($rm);
# $g = int($gm);
# $b = int($bm);
#}
#warn "red $r, gr $g, blu $b";
# $r = int($z > $zmean ? $self->rgb_h->[0] * ($z-$zmean)/($zmax-$zmean) :
# $self->rgb_l->[0] * ($zmean-$z)/($zmean-$zmin));
# $g = int($z > $zmean ? $self->rgb_h->[1] * ($z-$zmean)/($zmax-$zmean) :
# $self->rgb_l->[1] * ($zmean-$z)/($zmean-$zmin));
# $b = int($z > $zmean ? $self->rgb_h->[2] * ($z-$zmean)/($zmax-$zmean) :
# $self->rgb_l->[2] * ($zmean-$z)/($zmean-$zmin));
#warn "$z [$zmin,$zmean,$zmax] rgb($r,$g,$b)";
# $group->rect(x=>$x1,y=>$y1-abs($y2-$y1),width=>abs($x2-$x1),height=>abs($y2-$y1),style=>{'stroke'=>"rgb($r,$g,$b)",'fill'=>"rgb($r,$g,$b)"});
$group->rect(x=>$x1,y=>$y1-$ydim,width=>$xdim,height=>$ydim,style=>{'stroke'=>"rgb($r,$g,$b)",'fill'=>"rgb($r,$g,$b)"});
}
}
}
}
=head2 rgb_l
Title : rgb_l
Usage : $obj->rgb_l($newval)
Function:
Example :
Returns : value of rgb_l (a scalar)
Args : on set, new value (a scalar or undef, optional)
=cut
sub rgb_l{
my $self = shift;
return $self->{'rgb_l'} = shift if @_;
return $self->{'rgb_l'} || [0,0,0];
}
=head2 rgb_m
Title : rgb_m
Usage : $obj->rgb_m($newval)
Function:
Example :
Returns : value of rgb_m (a scalar)
Args : on set, new value (a scalar or undef, optional)
=cut
sub rgb_m{
my $self = shift;
return $self->{'rgb_m'} = shift if @_;
return $self->{'rgb_m'} || [128,128,128];
}
=head2 rgb_h
Title : rgb_h
Usage : $obj->rgb_h($newval)
Function:
Example :
Returns : value of rgb_h (a scalar)
Args : on set, new value (a scalar or undef, optional)
=cut
sub rgb_h{
my $self = shift;
return $self->{'rgb_h'} = shift if @_;
return $self->{'rgb_h'} || [255,255,255];
}
1;
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