From fc947f5985faf846a9a7a84b1e9c0db6723f0799 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Sun, 4 Feb 2018 23:36:00 +0100
Subject: [PATCH] [dxbc] Implemented Geometry SV RenderTargetId

---
 src/dxbc/dxbc_compiler.cpp | 19 +++++++++++++++++++
 src/dxbc/dxbc_compiler.h   |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/src/dxbc/dxbc_compiler.cpp b/src/dxbc/dxbc_compiler.cpp
index 1f7dd9b41..1db046416 100644
--- a/src/dxbc/dxbc_compiler.cpp
+++ b/src/dxbc/dxbc_compiler.cpp
@@ -4598,6 +4598,25 @@ namespace dxvk {
         emitVsSystemValueStore(sv, mask, value);
         break;
       
+      case DxbcSystemValue::RenderTargetId: {
+        if (m_gs.builtinLayer == 0) {
+          m_gs.builtinLayer = emitNewBuiltinVariable({
+            { DxbcScalarType::Uint32, 1, 0 },
+            spv::StorageClassOutput },
+            spv::BuiltInLayer,
+            "gs_layer");
+        }
+        
+        DxbcRegisterPointer ptr;
+        ptr.type.ctype   = DxbcScalarType::Uint32;
+        ptr.type.ccount  = 1;
+        ptr.id = m_gs.builtinLayer;
+        
+        emitValueStore(
+          ptr, emitRegisterExtract(value, mask),
+          DxbcRegMask(true, false, false, false));
+      } break;
+      
       default:
         Logger::warn(str::format(
           "DxbcCompiler: Unhandled GS SV output: ", sv));
diff --git a/src/dxbc/dxbc_compiler.h b/src/dxbc/dxbc_compiler.h
index 7ab0172e3..6c42abfe5 100644
--- a/src/dxbc/dxbc_compiler.h
+++ b/src/dxbc/dxbc_compiler.h
@@ -116,6 +116,8 @@ namespace dxvk {
     DxbcPrimitiveTopology outputTopology      = DxbcPrimitiveTopology::Undefined;
     uint32_t              outputVertexCount   = 0;
     uint32_t              functionId          = 0;
+    
+    uint32_t              builtinLayer        = 0;
   };