From f9e56c97cfc25e535306c0122462d328136a3708 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Mon, 15 Apr 2019 03:09:31 +0200
Subject: [PATCH] [d3d11] Fix hasing of geometry shaders with stream output

The xfb struct contains pointers, but we should hash the
strings instead, otherwise the hash changes between runs.
---
 src/d3d11/d3d11_device.cpp | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/d3d11/d3d11_device.cpp b/src/d3d11/d3d11_device.cpp
index cc2fdb712..5bfffbde3 100644
--- a/src/d3d11/d3d11_device.cpp
+++ b/src/d3d11/d3d11_device.cpp
@@ -676,11 +676,22 @@ namespace dxvk {
     
     // Compute hash from both the xfb info and the source
     // code, because both influence the generated code
-    std::array<Sha1Data, 2> chunks = {{
-      { pShaderBytecode, BytecodeLength },
-      { &xfb,            sizeof(xfb)    },
+    DxbcXfbInfo hashXfb = xfb;
+
+    std::vector<Sha1Data> chunks = {{
+      { pShaderBytecode, BytecodeLength  },
+      { &hashXfb,        sizeof(hashXfb) },
     }};
 
+    for (uint32_t i = 0; i < hashXfb.entryCount; i++) {
+      const char* semantic = hashXfb.entries[i].semanticName;
+
+      if (semantic) {
+        chunks.push_back({ semantic, std::strlen(semantic) });
+        hashXfb.entries[i].semanticName = nullptr;
+      }
+    }
+
     Sha1Hash hash = Sha1Hash::compute(chunks.size(), chunks.data());
     
     // Create the actual shader module