From 5c4e290d720b0aa68bf1cd158e7780a05abeb522 Mon Sep 17 00:00:00 2001
From: Guy1524 <35645466+Guy1524@users.noreply.github.com>
Date: Sat, 20 Jan 2018 21:20:45 -0500
Subject: [PATCH] Check if shader in READ_PATH exists before using it

Make sure that the replacement shader in the DXVK_SHADER_READ_PATH exists, if not use the generated shader.
---
 src/d3d11/d3d11_shader.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/d3d11/d3d11_shader.cpp b/src/d3d11/d3d11_shader.cpp
index 4e6a5901..f44f8536 100644
--- a/src/d3d11/d3d11_shader.cpp
+++ b/src/d3d11/d3d11_shader.cpp
@@ -46,9 +46,13 @@ namespace dxvk {
     // If requested by the user, replace
     // the shader with another file.
     if (readPath.size() != 0) {
-      m_shader->read(std::ifstream(
+      // Check whether the file exists
+      std::ifstream readStream(
         str::format(readPath, "/", m_name, ".spv"),
-        std::ios_base::binary));
+        std::ios_base::binary);
+      
+      if (readStream)
+        m_shader->read(std::move(readStream));
     }
   }