From aa848126cb6ceb00bd93e71d0ce53d93ee824897 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Sun, 21 Feb 2021 08:06:08 -0500
Subject: Comment about QPDFMatrix and QPDFObjectHandle::Matrix

---
 include/qpdf/QPDFObjectHandle.hh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'include')

diff --git a/include/qpdf/QPDFObjectHandle.hh b/include/qpdf/QPDFObjectHandle.hh
index 07c5b427..dc883102 100644
--- a/include/qpdf/QPDFObjectHandle.hh
+++ b/include/qpdf/QPDFObjectHandle.hh
@@ -267,7 +267,10 @@ class QPDFObjectHandle
         double ury;
     };
 
-    // Convenience object for transformation matrices
+    // Convenience object for transformation matrices. See also
+    // QPDFMatrix. Unfortunately we can't replace this with QPDFMatrix
+    // because QPDFMatrix's default constructor creates the identity
+    // transform matrix and this one is all zeroes.
     class Matrix
     {
       public:
-- 
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