From a36f5a3af3c2a084e866485acbcea978d667da5c Mon Sep 17 00:00:00 2001
From: Eliot Jones <elioty@hotmail.co.uk>
Date: Tue, 14 Jan 2020 14:52:51 +0000
Subject: [PATCH] handle missing embedded cid font for type 0 fonts

all font file entries in the font descriptor for type 0 fonts are optional. if the font is missing we default to returning the default bounding box.
---
 src/UglyToad.PdfPig/PdfFonts/CidFonts/Type0CidFont.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/UglyToad.PdfPig/PdfFonts/CidFonts/Type0CidFont.cs b/src/UglyToad.PdfPig/PdfFonts/CidFonts/Type0CidFont.cs
index a8324b45..a6a282d8 100644
--- a/src/UglyToad.PdfPig/PdfFonts/CidFonts/Type0CidFont.cs
+++ b/src/UglyToad.PdfPig/PdfFonts/CidFonts/Type0CidFont.cs
@@ -90,6 +90,11 @@
             {
                 throw new ArgumentException($"The provided character identifier was negative: {characterIdentifier}.");
             }
+
+            if (fontProgram == null)
+            {
+                return Descriptor?.BoundingBox ?? new PdfRectangle(0, 0, 1000, 0);
+            }
             
             if (fontProgram.TryGetBoundingBox(characterIdentifier, out var boundingBox))
             {