From 887cf9966526487dbe62d5628d52023059040a0f Mon Sep 17 00:00:00 2001
From: Matei George-Daniel <matei.georged@outlook.com>
Date: Sat, 18 Feb 2023 19:58:59 +0200
Subject: [PATCH] make dpfa lines mark safer

---
 rtengine/pdaflinesfilter.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/rtengine/pdaflinesfilter.cc b/rtengine/pdaflinesfilter.cc
index b5c72f7f4..60f2abcb6 100644
--- a/rtengine/pdaflinesfilter.cc
+++ b/rtengine/pdaflinesfilter.cc
@@ -275,7 +275,11 @@ int PDAFLinesFilter::mark(const array2D<float> &rawData, PixelsMap &bpMap)
     for (int y = 1; y < H_-1; ++y) {
         int yy = pattern_[idx] + off;
         if (y == yy) {
-            int n = markLine(rawData, bpMap, y) + markLine(rawData, bpMap, y-1) + markLine(rawData, bpMap, y+1);
+            int n = 0;
+            n += markLine(rawData, bpMap, y);
+            n += (y-1 <= 0   ) ? 0 : markLine(rawData, bpMap, y-1);
+            n += (y+1 >= H_-1) ? 0 : markLine(rawData, bpMap, y+1);
+            
             if (n) {
                 found += n;
                 if (settings->verbose) {