From 21252d9d89a5e158a8b67631f24dceb7f7e4200c Mon Sep 17 00:00:00 2001
From: Pirmin Kalberer <pka@sourcepole.ch>
Date: Fri, 16 Dec 2022 23:21:26 +0100
Subject: [PATCH] Fix padding when image size is multiple of chunk size

---
 src/decoder/image.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/decoder/image.rs b/src/decoder/image.rs
index 6d82d7f..6f97b01 100644
--- a/src/decoder/image.rs
+++ b/src/decoder/image.rs
@@ -32,12 +32,11 @@ impl TileAttributes {
         (self.image_height + self.tile_length - 1) / self.tile_length
     }
     fn padding_right(&self) -> usize {
-        self.tile_width - self.image_width % self.tile_width
+        (self.tile_width - self.image_width % self.tile_width) % self.tile_width
     }
     fn padding_down(&self) -> usize {
-        self.tile_length - self.image_height % self.tile_length
+        (self.tile_length - self.image_height % self.tile_length) % self.tile_length
     }
-
     pub fn get_padding(&self, tile: usize) -> (usize, usize) {
         let row = tile / self.tiles_across();
         let column = tile % self.tiles_across();