libobs-d3d11: Add optional macro to log shader disassembly

libobs-d3d11/d3d11-shader.cpp

@@ -201,6 +201,22 @@ void gs_shader::Compile(const char *shaderString, const char *file,
 		else
 			throw HRError("Failed to compile shader", hr);
 	}
+
+#ifdef DISASSEMBLE_SHADERS
+	ComPtr<ID3D10Blob> asmBlob;
+
+	if (!device->d3dDisassemble)
+		return;
+
+	hr = device->d3dDisassemble((*shader)->GetBufferPointer(),
+			(*shader)->GetBufferSize(), 0, nullptr, &asmBlob);
+
+	if (SUCCEEDED(hr) && !!asmBlob && asmBlob->GetBufferSize()) {
+		blog(LOG_INFO, "=============================================");
+		blog(LOG_INFO, "Disassembly output for shader '%s':\n%s",
+				file, asmBlob->GetBufferPointer());
+	}
+#endif
 }
 
 inline void gs_shader::UpdateParam(vector<uint8_t> &constData,