From a3754d662652e12da290e504692ac08538bc1dd8 Mon Sep 17 00:00:00 2001 From: Alexei Podtelezhnikov Date: Wed, 1 Feb 2017 22:36:16 -0500 Subject: [PATCH] Comment. --- src/smooth/ftgrays.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c index c590cce9f..349af7f83 100644 --- a/src/smooth/ftgrays.c +++ b/src/smooth/ftgrays.c @@ -341,7 +341,8 @@ typedef ptrdiff_t FT_PtrDist; /* Compute `dividend / divisor' and return both its quotient and */ /* remainder, cast to a specific type. This macro also ensures that */ - /* the remainder is always positive. */ + /* the remainder is always positive. We use the remainder to keep */ + /* track of accumulating errors and compensate for them. */ #define FT_DIV_MOD( type, dividend, divisor, quotient, remainder ) \ FT_BEGIN_STMNT \ (quotient) = (type)( (dividend) / (divisor) ); \