From d2f9cc7e8c378e07f9077d5d74d6069479cae50c Mon Sep 17 00:00:00 2001
From: ISSOtm <eldredhabert0@gmail.com>
Date: Sat, 12 Mar 2022 14:23:21 +0100
Subject: [PATCH] Document accepted number formats

---
 man/rgbgfx.1 | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/man/rgbgfx.1 b/man/rgbgfx.1
index 5cec72d6..8ddb658b 100644
--- a/man/rgbgfx.1
+++ b/man/rgbgfx.1
@@ -51,8 +51,28 @@ but
 is invalid because it could also be
 .Fl Fl version .
 .Pp
-TODO: describe what number formats are accepted.
+.Nm
+accepts decimal, binary, and hexadecimal numbers in option arguments.
+Decimal numbers are written as usual; binary numbers must be prefixed with either
+.Ql %
+or
+.Ql 0b ,
+and hexadecimal numbers must be prefixed with either
+.Ql $
+(which will likely need escaping or quoting to avoid being interpreted by the shell), or
+.Ql 0x .
+Leading zeros (after the base prefix, if any) are accepted, and letters are not case-sensitive.
+All of these are equivalent:
+.Ql 42 ,
+.Ql 042 ,
+.Ql 0b00101010 ,
+.Ql 0B101010 ,
+.Ql 0x2A ,
+.Ql 0X2A ,
+.Ql 0x2a .
+.Pp
 TODO: add "palette map" output.
+TODO: implement "at-files", and document them.
 .Pp
 The following options are accepted:
 .Bl -tag -width Ds