Minor fixes to Pl_PNGFilter

Fix comment, remove restriction that doesn't actually matter.

Minor fixes to Pl_PNGFilter
Fix comment, remove restriction that doesn't actually matter.
Jay Berkenbilt
1 parent be27d47b
Showing 2 changed files with 3 additions and 3 deletions
libqpdf/Pl_PNGFilter.cc
libqpdf/qpdf/Pl_PNGFilter.hh
@@ -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) ||
@@ -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