From f6fa8451057bd5eb872810b5564e8f92e2871a41 Mon Sep 17 00:00:00 2001
From: Curtis McEnroe <june@causal.agency>
Date: Fri, 7 Sep 2018 20:58:09 -0400
Subject: Add pngo.1

---
 bin/pngo.1 | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 bin/pngo.1

diff --git a/bin/pngo.1 b/bin/pngo.1
new file mode 100644
index 00000000..12e34efa
--- /dev/null
+++ b/bin/pngo.1
@@ -0,0 +1,49 @@
+.Dd $Mdocdate$
+.Dt PNGO 1
+.Os "Causal Agency"
+.Sh NAME
+.Nm pngo
+.Nd PNG optimizer
+.Sh SYNOPSIS
+.Nm
+.Op Fl cv
+.Op Fl o Ar file
+.Op Ar
+.Sh DESCRIPTION
+.Nm
+optimizes PNG files for size.
+.Pp
+The arguments are as follows:
+.Bl -tag -width Ds
+.It Fl c
+Write to standard output.
+.It Fl o Ar file
+Write to
+.Ar file .
+.It Fl v
+Output PNG header information.
+.El
+.Pp
+.Nm
+performs the following optimizations:
+.Bl -bullet
+.It
+Discard ancillary chunks.
+.It
+Discard unnecessary alpha channel.
+.It
+Convert unnecessary truecolor to grayscale.
+.It
+Palletize color if possible.
+.It
+Reduce bit depth if possible.
+.It
+Apply a simple filter heuristic.
+.It
+Apply zlib's best compresion.
+.El
+.Sh SEE ALSO
+.Xr glitch 1
+.Sh CAVEATS
+.Nm
+does not support interlaced PNGs.
-- 
cgit 1.4.1