WinPhoto works fine here. It sounds like a Fedora bug. Are you using the latest Tk, or the binary one provided by Fedora? This script works fine here.

#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use Tk::WinPhoto;
use Tk::JPEG;

my $image = shift || 'zen16.jpg';  #test image colors

my $mw = tkinit;
$mw->geometry("200x400+100+100");

my  $canv;

my $mainbutton = $mw->Button(-text=>'MainWindow Capture',
                             -command => \&mw_capture,
                )->pack; 
      
my $canvbutton = $mw->Button(-text=>'Canvas Capture',
                             -command => sub{
                                          &canv_capture},
                 )->pack; 


$canv = $mw->Scrolled('Canvas',
                      -width=>2400,
                      -height=>3400,
                      -scrollregion=>[0,0,2400,3400],
                      -scrollbars=>'osoe')
                      ->pack(-fill=>'both',
                      -expand=>1);


my $img = $mw->Photo(-file => $image );
$canv->createImage( 0, 0, -image => $img, -anchor => 'nw' );
 
# Create line inside the canvas upper area 
$canv->create ('line',1, 1, 3000, 3400, -fill=>'red');
$canv->createRectangle(10,20,30,40, -fill=>'blue' );

# Create line inside the lower  area 
$canv->createRectangle(400,400,800,800, -fill=>'blue' );

# Create line inside the lower  right area 
$canv->createRectangle(2000,3000,3000,3400, -fill=>'blue' );

MainLoop;    

#########################################################
sub mw_capture{

my $image = $mw->Photo(-format => 'Window', 
                        -data => oct($mw->id)
#                    #  -data =>  oct('0xa00022')
             #  -data =>  oct($id)
               );

my $pathname = $0.'-mainwindow.'.time.'.jpg';
$image->write($pathname, -format => 'JPEG');

}
##########################################################

sub canv_capture{

#$canv->configure(-height=>2400, -width =>3400);
#$mw->update;

my $image = $mw->Photo(-format => 'Window', 
                        -data => oct($canv->id)
               );

my $pathname = $0.'-canvas.'.time.'.jpg';
$image->write($pathname, -format => 'JPEG');

}
##############################################################
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