From 5c04aacbe2e46d082d14513cf1c7bf19f92c84b7 Mon Sep 17 00:00:00 2001
From: Ryan Oldenburg <ryan@guzba.com>
Date: Wed, 25 May 2022 18:57:33 -0500
Subject: [PATCH] better check

---
 src/pixie/fileformats/jpeg.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pixie/fileformats/jpeg.nim b/src/pixie/fileformats/jpeg.nim
index 8d0695a..43a9146 100644
--- a/src/pixie/fileformats/jpeg.nim
+++ b/src/pixie/fileformats/jpeg.nim
@@ -276,7 +276,7 @@ proc decodeSOF0(state: var DecoderState) =
     if quantizationTableId > 3:
       failInvalid("invalid quantization table id")
 
-    if vertical == 0 or vertical > 4 or horizontal == 0 or horizontal > 4:
+    if vertical notin {0, 1, 2, 4} or horizontal notin {0, 1, 2, 4}:
       failInvalid("invalid component scaling factor")
 
     component.xScale = vertical.int