From 2babc79d5cdcd2d97ef2dc7453dd2945580a56af Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bla=C5=BE=20Toma=C5=BEi=C4=8D?= <blaz.tomazic@gmail.com>
Date: Fri, 28 Dec 2018 10:57:41 +0100
Subject: [PATCH] Use swapchain's m_num only when attachment array has valid
 content

---
 src/renderer_mtl.mm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/renderer_mtl.mm b/src/renderer_mtl.mm
index 453b6fb59..a99d84168 100644
--- a/src/renderer_mtl.mm
+++ b/src/renderer_mtl.mm
@@ -1465,7 +1465,7 @@ namespace bgfx { namespace mtl
 
 			uint32_t numMrt = 1;
 			FrameBufferHandle fbh = m_fbh;
-			if (isValid(fbh) )
+			if (isValid(fbh) && m_frameBuffers[fbh.idx].m_swapChain == NULL)
 			{
 				const FrameBufferMtl& fb = m_frameBuffers[fbh.idx];
 				numMrt = bx::uint32_max(1, fb.m_num);