Add stencil reference as a supported shader builtin

renderdoc/api/replay/renderdoc_tostr.inl

@@ -518,6 +518,7 @@ std::string DoStringise(const ShaderBuiltin &el)
     STRINGISE_ENUM_CLASS_NAMED(DepthOutput, "Depth Output");
     STRINGISE_ENUM_CLASS_NAMED(DepthOutputGreaterEqual, "Depth Output (GEqual)");
     STRINGISE_ENUM_CLASS_NAMED(DepthOutputLessEqual, "Depth Output (LEqual)");
+    STRINGISE_ENUM_CLASS_NAMED(StencilReference, "Stencil Ref Value");
   }
   END_ENUM_STRINGISE();
 }

renderdoc/api/replay/replay_enums.h

@@ -744,6 +744,10 @@ to apply to multiple related things - see :data:`ClipDistance`, :data:`CullDista
 
   For indirect or multi-draw commands, the index of this draw call within the overall draw command.
 
+.. data:: StencilReference
+
+  The stencil reference to be used for stenciling operations on this fragment.
+
 )");
 enum class ShaderBuiltin : uint32_t
 {
@@ -780,6 +784,7 @@ enum class ShaderBuiltin : uint32_t
   BaseVertex,
   BaseInstance,
   DrawIndex,
+  StencilReference,
   Count,
 };
 

renderdoc/driver/d3d11/d3d11_shaderdebug.cpp

@@ -177,6 +177,8 @@ ShaderDebug::State D3D11DebugManager::CreateShaderDebugState(ShaderDebugTrace &t
         v.name = "oDepthGreaterEqual";
       else if(sig.systemValue == ShaderBuiltin::MSAACoverage)
         v.name = "oMask";
+      else if(sig.systemValue == ShaderBuiltin::StencilReference)
+        v.name = "oStencilRef";
       // if(sig.systemValue == TYPE_OUTPUT_CONTROL_POINT)							str = "oOutputControlPoint";
       else
       {

renderdoc/driver/gl/gl_shader_refl.cpp

@@ -1883,6 +1883,8 @@ void MakeShaderReflection(const GLHookSet &gl, GLenum shadType, GLuint sepProg,
           sig.systemValue = ShaderBuiltin::DepthOutput;
         if(IS_BUILTIN("gl_SampleMask"))
           sig.systemValue = ShaderBuiltin::MSAACoverage;
+        if(IS_BUILTIN("gl_FragStencilRefARB"))
+          sig.systemValue = ShaderBuiltin::StencilReference;
 
         // CS built-in inputs
         if(IS_BUILTIN("gl_NumWorkGroups"))

renderdoc/driver/shaders/spirv/spirv_disassemble.cpp

@@ -3682,6 +3682,7 @@ ShaderBuiltin BuiltInToSystemAttribute(ShaderStage stage, const spv::BuiltIn el)
     case spv::BuiltInBaseInstance: return ShaderBuiltin::BaseInstance;
     case spv::BuiltInDrawIndex: return ShaderBuiltin::DrawIndex;
     case spv::BuiltInViewIndex: return ShaderBuiltin::ViewportIndex;
+    case spv::BuiltInFragStencilRefEXT: return ShaderBuiltin::StencilReference;
     default: break;
   }