From cccb26b92dc2361073af5645a98d451f062135c5 Mon Sep 17 00:00:00 2001
From: PrinsFrank <25006490+PrinsFrank@users.noreply.github.com>
Date: Fri, 17 Jul 2026 20:50:41 +0200
Subject: [PATCH] Don't return new TransformationMatrix when multiplying with
 identity matrix reducing memory footprint

---
 .../PositionedText/TransformationMatrix.php            | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/Document/ContentStream/PositionedText/TransformationMatrix.php b/src/Document/ContentStream/PositionedText/TransformationMatrix.php
index 96082bc9..64471905 100644
--- a/src/Document/ContentStream/PositionedText/TransformationMatrix.php
+++ b/src/Document/ContentStream/PositionedText/TransformationMatrix.php
@@ -14,6 +14,16 @@ public function __construct(
 
     /** Please note that a concatenated transformation matrix of A B !== B A */
     public function multiplyWith(self $other): self {
+        if ($other->scaleX === 1.0
+            && $other->scaleY === 1.0
+            && $other->shearX === 0.0
+            && $other->shearY === 0.0
+            && $other->offsetX === 0.0
+            && $other->offsetY === 0.0
+        ) {
+            return $this; // When multiplying with the identity matrix, the current matrix is unchanged
+        }
+
         return new self(
             $this->scaleX * $other->scaleX + $this->shearX * $other->shearY,
             $this->scaleX * $other->shearX + $this->shearX * $other->scaleY,