Support automatic width and height calculation of HEIC images

[djarran]

Description: When passing an HEIC image to Image without specifying the width and height of the image, it will fail.

In this part of the Image method, we use getimagesize, which returns false as it does not support HEIC. Since $imsize is false, and so are $w and $h, we get the error.

TCPDF/tcpdf.php

Line 6979 in 14ffa0e

if (!empty($imgdata)) {

if (!empty($imgdata)) {
	// copy image to cache
	$original_file = $file;
	$file = TCPDF_STATIC::getObjFilename('img', $this->file_id);
	$fp = TCPDF_STATIC::fopenLocal($file, 'w');
	if (!$fp) {
		$this->Error('Unable to write file: '.$file);
	}
	fwrite($fp, $imgdata);
	fclose($fp);
	unset($imgdata);
	$imsize = @getimagesize($file);
	if ($imsize === FALSE) {
		unlink($file);
		$file = $original_file;
	}
}
if ($imsize === FALSE) {
	if (($w > 0) AND ($h > 0)) {
		// get measures from specified data
		$pw = $this->getHTMLUnitToUnits($w, 0, $this->pdfunit, true) * $this->imgscale * $this->k;
		$ph = $this->getHTMLUnitToUnits($h, 0, $this->pdfunit, true) * $this->imgscale * $this->k;
		$imsize = array($pw, $ph);
	} else {
		$this->Error('[Image] Unable to get the size of the image: '.$file);
	}
}