From f20e1602d64b03397bc54425ff7f5be2e3214aff Mon Sep 17 00:00:00 2001
From: Owen Thompson <oxt3479@rit.edu>
Date: Mon, 30 Mar 2020 14:04:07 -0400
Subject: [PATCH] Implementation of operator << on Matrix22 for stream output.

Signed-off-by: Owen Thompson <oxt3479@rit.edu>
---
 IlmBase/Imath/ImathMatrix.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/IlmBase/Imath/ImathMatrix.h b/IlmBase/Imath/ImathMatrix.h
index d458d4fcf8..0c74404156 100644
--- a/IlmBase/Imath/ImathMatrix.h
+++ b/IlmBase/Imath/ImathMatrix.h
@@ -4076,6 +4076,35 @@ Matrix44<T>::shear (const Shear6<S> &h)
 // Implementation of stream output
 //--------------------------------
 
+template <class T>
+std::ostream &
+operator << (std::ostream &s, const Matrix22<T> &m)
+{
+    std::ios_base::fmtflags oldFlags = s.flags();
+    int width;
+
+    if (s.flags() & std::ios_base::fixed)
+    {
+        s.setf (std::ios_base::showpoint);
+        width = static_cast<int>(s.precision()) + 5;
+    }
+    else
+    {
+        s.setf (std::ios_base::scientific);
+        s.setf (std::ios_base::showpoint);
+        width = static_cast<int>(s.precision()) + 8;
+    }
+
+    s << "(" << std::setw (width) << m[0][0] <<
+         " " << std::setw (width) << m[0][1] << "\n" <<
+
+         " " << std::setw (width) << m[1][0] <<
+         " " << std::setw (width) << m[1][1] << ")\n";
+
+    s.flags (oldFlags);
+    return s;
+}
+
 template <class T>
 std::ostream &
 operator << (std::ostream &s, const Matrix33<T> &m)