Hide header and footer in custom pdf Prestashop - pdf-generation

Question

I made method to print custom pdf in my module in Prestashop 1.7.4.1. Everything works fine, but it print header with shop logo and footer with information about electronic invoice on every page. How can I hide them that my template take all size of the printed page?
I've tried to add to my pdf object code from tcpdf example but it seems I don't use TCPDF in presta:
$pdf->setPrintHeader(false);
$pdf->setPrintFooter(false);
This is my class:
class HTMLTemplateCustomPdf extends HTMLTemplate
{
public $custom_model;
public function __construct($custom_object, $smarty)
{
$this->custom_model = $custom_object;
$this->smarty = $smarty;
}
/**
* Returns the template's HTML content
* #return string HTML content
*/
public function getContent()
{
//here I get content
return $this->smarty->fetch(_PS_MODULE_DIR_ . 'ps_first_module/views/templates/hook/pdf.tpl');
}
/**
* Returns the template filename
* #return string filename
*/
public function getFilename()
{
return 'custom_pdf.pdf';
}
/**
* Returns the template filename when using bulk rendering
* #return string filename
*/
public function getBulkFilename()
{
return 'custom_pdf.pdf';
}
This is where I create pdf object:
if (Tools::isSubmit('print')) {
if (Shop::getContext() != Shop::CONTEXT_GROUP && Shop::getContext() != Shop::CONTEXT_ALL) {
require_once _PS_MODULE_DIR_ . 'ps_first_module/HTMLTemplateCustomPdf.php';
$orientation = 'L';
$pdf = new PDF($custom_object, 'CustomPdf', Context::getContext()->smarty, $orientation);
$pdf->render();
}
}
EDIT:
This is my PDFGenerator.php override. Should I put this in root/override/classes/pdf or my_module/override/classes/pdf?
<?php
class PDFGenerator extends PDFGeneratorCore
{
/**
* #param bool $use_cache
* #param string $orientation
*/
public function __construct($use_cache = false, $orientation = 'L')
{
parent::__construct($orientation, 'mm', 'A4', true, 'UTF-8', $use_cache, false);
$this->setRTL(Context::getContext()->language->is_rtl);
}
/**
* Write a PDF page
*/
public function writePage()
{
if(!$this->header){
$this->SetHeaderMargin(0);
}
else{
$this->SetHeaderMargin(5);
}
if(!$this->footer){
$this->SetFooterMargin(0);
}
else{
$this->SetFooterMargin(21);
}
$this->setMargins(10, 10, 10);
$this->AddPage();
$this->writeHTML($this->content, true, false, true, false, '');
}
}

Answer 1

I've tried in version 1.7.2 and file properties mention Producer: TCPDF 6.2.12 (http://www.tcpdf.org). Also, class Pdf in function render() as:
$this->pdf_renderer->createHeader($template->getHeader());
$this->pdf_renderer->createFooter($template->getFooter());
So, the best way would be your class HTMLTemplateCustomPdf to include the functions getHeader() and getFooter() to return false (or empty) otherwise it will use those from HTMLTemplateCore.
In the override for PDFGenerator, you can do something like:
public function writePage()
{
if(!$this->header){
$this->SetHeaderMargin(0);
}
else{
$this->SetHeaderMargin(5);
}
if(!$this->footer){
$this->SetFooterMargin(0);
}
else{
$this->SetFooterMargin(21);
}
$this->setMargins(10, 40, 10);
$this->AddPage();
$this->writeHTML($this->content, true, false, true, false, '');
}
You can also set different margins if needed in $this->setMargins(10, 40, 10);