From a774aa439fc3e9833e8db12bf2d31ca893278acf Mon Sep 17 00:00:00 2001
From: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
Date: Tue, 9 Mar 2021 09:23:43 +0100
Subject: [PATCH] fix(mask) fix off by one pixel issue with horizontal line
 masks

---
 src/lv_draw/lv_draw_mask.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lv_draw/lv_draw_mask.c b/src/lv_draw/lv_draw_mask.c
index 41929c19f..9d55622ff 100644
--- a/src/lv_draw/lv_draw_mask.c
+++ b/src/lv_draw/lv_draw_mask.c
@@ -190,6 +190,11 @@ void lv_draw_mask_line_points_init(lv_draw_mask_line_param_t * param, lv_coord_t
 {
     lv_memset_00(param, sizeof(lv_draw_mask_line_param_t));
 
+    if(p1y == p2y && side == LV_DRAW_MASK_LINE_SIDE_BOTTOM) {
+        p1y--;
+        p2y--;
+    }
+
     if(p1y > p2y) {
         lv_coord_t t;
         t = p2x;