make the jpegquality docs clearer

[imager.git] / PNG / README

diff --git a/PNG/README b/PNG/README
index d786557896cd08d694a7290cb3fec0bd35ff7cdf..4b2fe74d6b2a9a7c963d7dce7d04abcd6c625b9a 100644 (file)
--- a/PNG/README
+++ b/PNG/README
@@ -2,6 +2,9 @@ Imager::File::PNG provides PNG file format support for Imager.
 
 It requires libpng, including development files, to be installed.
 
+libpng 1.2 or later is supported, with minor extra features with
+libpng 1.4 and libpng 1.5.3.
+
 For Linux distributions this typically requires installation of the
 associated -dev or -devel package.