From 661ed1d28ef03bc61739e4998b8d60005f1f2ee3 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Sat, 13 Jan 2018 13:21:23 -0500
Subject: [PATCH] Minor fixes to Pl_PNGFilter

---
 libqpdf/Pl_PNGFilter.cc      | 4 ++--
 libqpdf/qpdf/Pl_PNGFilter.hh | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/libqpdf/Pl_PNGFilter.cc b/libqpdf/Pl_PNGFilter.cc
index 35ab03f..730d6d9 100644
--- a/libqpdf/Pl_PNGFilter.cc
+++ b/libqpdf/Pl_PNGFilter.cc
@@ -16,10 +16,10 @@ Pl_PNGFilter::Pl_PNGFilter(char const* identifier, Pipeline* next,
     buf2(0),
     pos(0)
 {
-    if ((samples_per_pixel < 1) || (samples_per_pixel > 4))
+    if (samples_per_pixel < 1)
     {
         throw std::runtime_error(
-            "PNGFilter created with invalid samples_per_pixel not from 1 to 4");
+            "PNGFilter created with invalid samples_per_pixel");
     }
     if (! ((bits_per_sample == 1) ||
            (bits_per_sample == 2) ||
diff --git a/libqpdf/qpdf/Pl_PNGFilter.hh b/libqpdf/qpdf/Pl_PNGFilter.hh
index b5fcf53..f167c67 100644
--- a/libqpdf/qpdf/Pl_PNGFilter.hh
+++ b/libqpdf/qpdf/Pl_PNGFilter.hh
@@ -12,7 +12,7 @@
 class Pl_PNGFilter: public Pipeline
 {
   public:
-    // Encoding is not presently supported
+    // Encoding is only partially supported
     enum action_e { a_encode, a_decode };
 
     QPDF_DLL
--
libgit2 0.21.4