Replace spirv-helper stuff with a library that combines everything

backends/include/pd_system/spirv-helper.hpp

@@ -1,34 +0,0 @@
-#pragma once
-
-#include <pd/common.hpp>
-
-struct TBuiltInResource;
-namespace PD {
-class SpirvHelper {
- public:
-  enum class Format {
-    GLSL,
-    HLSL,
-    MSL,  // Not supported yet
-    SPIRV,
-  };
-
-  enum class Stage {
-    Vertex = 0,
-    Geometry = 3,
-    Fragment = 4,
-  };
-
-  SpirvHelper() = default;
-  ~SpirvHelper() = default;
-
-  static void Init();
-  static void Finalize();
-  static void SetupResources(TBuiltInResource& resources);
-  static std::vector<PD::u32> GLSL2SPV(Stage stage, const char* code,
-                                       bool vulkan_mode = false);
-  static std::string SPV2GLSL(const std::vector<PD::u32>& spirv, int version,
-                              bool es = false);
-  static std::string SPV2HLSL(const std::vector<PD::u32>& spirv, int version);
-};
-}  // namespace PD