From ffaf4d5da4baf4ab4bcd8b2b819c72034ba81c89 Mon Sep 17 00:00:00 2001
From: Ruslan Garnov <ruslan.garnov@intel.com>
Date: Fri, 26 Apr 2019 17:34:44 +0300
Subject: [PATCH] Fixed incorrect first window setting for fluid FilterAgent

---
 modules/gapi/src/backends/fluid/gfluidbackend.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/gapi/src/backends/fluid/gfluidbackend.cpp b/modules/gapi/src/backends/fluid/gfluidbackend.cpp
index 52a9a497ff..d9c91e476d 100644
--- a/modules/gapi/src/backends/fluid/gfluidbackend.cpp
+++ b/modules/gapi/src/backends/fluid/gfluidbackend.cpp
@@ -371,7 +371,8 @@ std::pair<int,int> cv::gimpl::FluidUpscaleMapper::linesReadAndNextWindow(int out
 
 int cv::gimpl::FluidFilterAgent::firstWindow(std::size_t) const
 {
-    return k.m_window + k.m_lpi - 1;
+    int lpi = std::min(k.m_lpi, m_outputLines - m_producedLines);
+    return k.m_window + lpi - 1;
 }
 
 std::pair<int,int> cv::gimpl::FluidFilterAgent::linesReadAndnextWindow(std::size_t) const