From d2daf543795ebe8cfc259f6dbd5282315623377c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=91=D1=80=D0=B0=D0=BD=D0=B8=D0=BC=D0=B8=D1=80=20=D0=9A?=
 =?UTF-8?q?=D0=B0=D1=80=D0=B0=D1=9F=D0=B8=D1=9B?=
 <branimirkaradzic@gmail.com>
Date: Tue, 25 Dec 2018 23:20:14 -0800
Subject: [PATCH] Metal: Fixed MSAA detection.

---
 src/renderer_mtl.mm | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/renderer_mtl.mm b/src/renderer_mtl.mm
index 505c6f312..db47e58e4 100644
--- a/src/renderer_mtl.mm
+++ b/src/renderer_mtl.mm
@@ -304,7 +304,7 @@ namespace bgfx { namespace mtl
 	};
 	BX_STATIC_ASSERT(TextureFormat::Count == BX_COUNTOF(s_textureFormat) );
 
-	int s_msaa[] =
+	int32_t s_msaa[] =
 	{
 		 1,
 		 2,
@@ -600,11 +600,18 @@ namespace bgfx { namespace mtl
 				}
 			}
 
-			for (uint32_t ii = 1; ii < 5; ++ii)
+			for (uint32_t ii = 1, last = 0; ii < BX_COUNTOF(s_msaa); ++ii)
 			{
-				if (!m_device.supportsTextureSampleCount(s_msaa[ii]) )
+				const int32_t sampleCount = 1<<(ii-1);
+
+				if (!m_device.supportsTextureSampleCount(sampleCount) )
 				{
-					s_msaa[ii] = s_msaa[ii-1];
+					s_msaa[ii] = sampleCount;
+					last = ii;
+				}
+				else
+				{
+					s_msaa[ii] = s_msaa[last];
 				}
 			}