From 15969fbe19441425573b4edb468bfe1749d2fdaa Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Thu, 2 Jul 2026 15:06:57 +0200
Subject: [PATCH] Add basic support for non-embedded TrebuchetMS fonts (issue
 21523)

---
 src/core/standard_fonts.js    | 4 ++++
 test/pdfs/issue21523.pdf.link | 1 +
 test/test_manifest.json       | 9 +++++++++
 3 files changed, 14 insertions(+)
 create mode 100644 test/pdfs/issue21523.pdf.link

diff --git a/src/core/standard_fonts.js b/src/core/standard_fonts.js
index 88f22a4a6..4c0241a66 100644
--- a/src/core/standard_fonts.js
+++ b/src/core/standard_fonts.js
@@ -171,6 +171,10 @@ const getNonStdFontMap = getLookupTableFactory(function (t) {
   t["MS-PMincho-Italic"] = "MS PMincho-Italic";
   t.NuptialScript = "Times-Italic";
   t.SegoeUISymbol = "Helvetica";
+  t.TrebuchetMS = "Helvetica";
+  t["TrebuchetMS-Bold"] = "Helvetica-Bold";
+  t["TrebuchetMS-BoldItalic"] = "Helvetica-BoldOblique";
+  t["TrebuchetMS-Italic"] = "Helvetica-Oblique";
 });
 
 const getSerifFonts = getLookupTableFactory(function (t) {
diff --git a/test/pdfs/issue21523.pdf.link b/test/pdfs/issue21523.pdf.link
new file mode 100644
index 000000000..e0a5a0fd1
--- /dev/null
+++ b/test/pdfs/issue21523.pdf.link
@@ -0,0 +1 @@
+https://github.com/user-attachments/files/29594283/Zavrnitev.-.dopis.-.71634.-.SI_CL_26_001893.-.71634.-.331459.-.2026070113544.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 3021e95eb..b64418498 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -12450,6 +12450,15 @@
     "disableFontFace": true,
     "type": "eq"
   },
+  {
+    "id": "issue21523",
+    "file": "pdfs/issue21523.pdf",
+    "md5": "7d21cf443ec7490b50089a1eb7d6e6a1",
+    "rounds": 1,
+    "link": true,
+    "lastPage": 1,
+    "type": "eq"
+  },
   {
     "id": "issue19281",
     "file": "pdfs/issue19281.pdf",