From c49b0360966da9cdbdbafd0ce926269e777bc774 Mon Sep 17 00:00:00 2001 From: Lars Kiesow Date: Sat, 25 Jan 2014 15:34:23 +0100 Subject: [PATCH] Documentation for scale filter factor --- doc/filters.texi | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/doc/filters.texi b/doc/filters.texi index 9e67db4888..28e7a24af9 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -6911,6 +6911,11 @@ maintains the aspect ratio of the input image, calculated from the other specified dimension. If both of them are -1, the input size is used +If one of the values is -n with n > 1, the scale filter will also use a value +that maintains the aspect ratio of the input image, calculated from the other +specified dimension. After that it will, however, make sure that the calculated +dimension is divisible by n and adjust the value if necessary. + See below for the list of accepted constants for use in the dimension expression.