From 835b5ffddd8a5c0cfa7f1fbf7a7a6c15a48bacaa Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Mon, 27 Jul 2020 13:00:24 +0200
Subject: [PATCH] Only check `isType3Font` the first time that
 `TranslatedFont.loadType3Data` is called

If the `TranslatedFont.type3Loaded` property exists, then you already know that the font must be a Type3 one.
---
 src/core/evaluator.js | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/core/evaluator.js b/src/core/evaluator.js
index cee0da3d7..dd69ef65e 100644
--- a/src/core/evaluator.js
+++ b/src/core/evaluator.js
@@ -3378,13 +3378,12 @@ class TranslatedFont {
   }
 
   loadType3Data(evaluator, resources, task) {
-    if (!this.font.isType3Font) {
-      throw new Error("Must be a Type3 font.");
-    }
-
     if (this.type3Loaded) {
       return this.type3Loaded;
     }
+    if (!this.font.isType3Font) {
+      throw new Error("Must be a Type3 font.");
+    }
     // When parsing Type3 glyphs, always ignore them if there are errors.
     // Compared to the parsing of e.g. an entire page, it doesn't really
     // make sense to only be able to render a Type3 glyph partially.