From 2680bd0608b0c88225a89ce662f2292714a36136 Mon Sep 17 00:00:00 2001
From: Matthew Endsley <mendsley@gmail.com>
Date: Tue, 6 Jan 2015 11:23:50 +0000
Subject: [PATCH] D3D11 constant buffer must align ByteWidth to 16 bytes

See remarks of:
https://msdn.microsoft.com/en-us/library/windows/desktop/ff476092(v=vs.85).aspx

Most PC drivers don't seem to enforce this, but it will
crash the xb1 implementation if fed an unaligned value.
---
 src/renderer_d3d11.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/renderer_d3d11.cpp b/src/renderer_d3d11.cpp
index c208773d..50f1a972 100644
--- a/src/renderer_d3d11.cpp
+++ b/src/renderer_d3d11.cpp
@@ -2647,7 +2647,7 @@ namespace bgfx { namespace d3d11
 		if (0 < size)
 		{
 			D3D11_BUFFER_DESC desc;
-			desc.ByteWidth = size;
+			desc.ByteWidth = (size + 0xf) & ~0xf;
 			desc.Usage = D3D11_USAGE_DEFAULT;
 			desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
 			desc.CPUAccessFlags = 0;