From 3f6e52b62adcd11ee1a15f9a94c2a43547aa3a5d Mon Sep 17 00:00:00 2001
From: Sergey Lipskiy <gonetz@ngs.ru>
Date: Sat, 29 Nov 2014 19:01:27 +0600
Subject: [PATCH] Fix flicker in interlaced mode.

---
 FrameBuffer.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/FrameBuffer.cpp b/FrameBuffer.cpp
index 879c4016..fbf6551c 100644
--- a/FrameBuffer.cpp
+++ b/FrameBuffer.cpp
@@ -386,8 +386,12 @@ void FrameBufferList::renderBuffer(u32 _address)
 	vStartPrev = vStart;
 
 	srcY0 = ((_address - pBuffer->m_startAddress) << 1 >> pBuffer->m_size) / (*REG.VI_WIDTH);
-	if (isLowerField)
+	if (isLowerField) {
+		if (srcY0 > 0)
 		--srcY0;
+		if (dstY0 > 0)
+			--dstY0;
+	}
 
 	if (srcY0 + vCurrentHeight > vFullHeight) {
 		dstPartHeight = srcY0;