From 6e4012550cd8130bd17a92671489097662642948 Mon Sep 17 00:00:00 2001
From: Alexei Podtelezhnikov <apodtele@gmail.com>
Date: Wed, 23 Nov 2022 04:12:08 +0000
Subject: [PATCH] * src/base/ftlcdfil.c (FT_SHIFTCLAMP): Cancel clamping.

Without clamping, we might get garbage output for unnormalized weights.
So what? Garbage in, garbage out - but filtering becomes noticeably faster.
---
 src/base/ftlcdfil.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/base/ftlcdfil.c b/src/base/ftlcdfil.c
index e72f6d668..f3072f2ca 100644
--- a/src/base/ftlcdfil.c
+++ b/src/base/ftlcdfil.c
@@ -28,7 +28,12 @@
 /* define USE_LEGACY to implement the legacy filter */
 #define  USE_LEGACY
 
+#if 1
+#define FT_SHIFTCLAMP( x )  (FT_Byte)( x >> 8 )
+#else
 #define FT_SHIFTCLAMP( x )  ( x >>= 8, (FT_Byte)( x > 255 ? 255 : x ) )
+#endif
+
 
 
   /* add padding according to filter weights */