From 1056a310c938c7bc39d873c337c3fa6bf3e8a686 Mon Sep 17 00:00:00 2001
From: stollr <christian.stoller@mail.de>
Date: Mon, 11 Mar 2024 23:53:45 +0100
Subject: [PATCH] Fixed handling of transparency in PDF/A mode in addExtGState
 method

The condition allowed to add ExtGState in all PDF/A modes and disallowed
in default mode.

This fix inlines the condition with setExtGState to allow transparency
parameters for non-PDF/A and PDF/A > 1 documents.

The state condition is copied from 'setExtGState'.
---
 tcpdf.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tcpdf.php b/tcpdf.php
index 60f93c41..eae6f92c 100644
--- a/tcpdf.php
+++ b/tcpdf.php
@@ -13936,8 +13936,8 @@ public function setVisibility($v) {
 	 * @since 3.0.000 (2008-03-27)
 	 */
 	protected function addExtGState($parms) {
-		if ($this->pdfa_mode || $this->pdfa_version >= 2) {
-			// transparencies are not allowed in PDF/A mode
+		if (($this->pdfa_mode && $this->pdfa_version < 2) || ($this->state != 2)) {
+			// transparency is not allowed in PDF/A-1 mode
 			return;
 		}
 		// check if this ExtGState already exist