ShaderGen: Split HW shadergen from base

src/core/shadergen.h

@@ -0,0 +1,44 @@
+#pragma once
+#include "gpu_hw.h"
+#include "host_display.h"
+#include <sstream>
+#include <string>
+
+class ShaderGen
+{
+public:
+  ShaderGen(HostDisplay::RenderAPI render_api, bool supports_dual_source_blend);
+  ~ShaderGen();
+
+  static bool UseGLSLBindingLayout();
+
+  std::string GenerateScreenQuadVertexShader();
+  std::string GenerateFillFragmentShader();
+  std::string GenerateCopyFragmentShader();
+
+protected:
+  ALWAYS_INLINE bool IsVulkan() const { return (m_render_api == HostDisplay::RenderAPI::Vulkan); }
+
+  void SetGLSLVersionString();
+  void DefineMacro(std::stringstream& ss, const char* name, bool enabled);
+  void WriteHeader(std::stringstream& ss);
+  void DeclareUniformBuffer(std::stringstream& ss, const std::initializer_list<const char*>& members,
+                            bool push_constant_on_vulkan);
+  void DeclareTexture(std::stringstream& ss, const char* name, u32 index);
+  void DeclareTextureBuffer(std::stringstream& ss, const char* name, u32 index, bool is_int, bool is_unsigned);
+  void DeclareVertexEntryPoint(std::stringstream& ss, const std::initializer_list<const char*>& attributes,
+                               u32 num_color_outputs, u32 num_texcoord_outputs,
+                               const std::initializer_list<std::pair<const char*, const char*>>& additional_outputs,
+                               bool declare_vertex_id = false, const char* output_block_suffix = "");
+  void DeclareFragmentEntryPoint(std::stringstream& ss, u32 num_color_inputs, u32 num_texcoord_inputs,
+                                 const std::initializer_list<std::pair<const char*, const char*>>& additional_inputs,
+                                 bool declare_fragcoord = false, u32 num_color_outputs = 1, bool depth_output = false);
+
+  HostDisplay::RenderAPI m_render_api;
+  bool m_glsl;
+  bool m_supports_dual_source_blend;
+  bool m_use_glsl_interface_blocks;
+  bool m_use_glsl_binding_layout;
+
+  std::string m_glsl_version_string;
+};