/* -*- mesa-c++  -*-
 * Copyright 2022 Collabora LTD
 * Author: Gert Wollny <gert.wollny@collabora.com>
 * SPDX-License-Identifier: MIT
 */

#ifndef SFN_TESS_SHADER_H
#define SFN_TESS_SHADER_H

#include "sfn_shader_vs.h"

namespace r600 {

class VertexExportStage;

class TCSShader : public Shader {
public:
   TCSShader(const r600_shader_key& key);

private:
   bool do_scan_instruction(nir_instr *instr) override;
   int do_allocate_reserved_registers() override;

   bool process_stage_intrinsic(nir_intrinsic_instr *intr) override;
   void do_get_shader_info(r600_shader *sh_info) override;
   bool store_tess_factor(nir_intrinsic_instr *instr);

   bool load_input(UNUSED nir_intrinsic_instr *intr) override
   {
      unreachable("load_input must be lowered in TCS");
   };
   bool store_output(UNUSED nir_intrinsic_instr *intr) override
   {
      unreachable("load_output must be lowered in TCS");
   };

   bool read_prop(std::istream& is) override;
   void do_print_properties(std::ostream& os) const override;

   PRegister m_tess_factor_base;
   PRegister m_rel_patch_id;
   PRegister m_invocation_id;
   PRegister m_primitive_id;

   unsigned m_tcs_prim_mode{0};
};

class TESShader : public VertexStageShader {
public:
   TESShader(const pipe_stream_output_info *so_info,
             const r600_shader *gs_shader,
             const r600_shader_key& key);

private:
   bool do_scan_instruction(nir_instr *instr) override;
   int do_allocate_reserved_registers() override;

   bool process_stage_intrinsic(nir_intrinsic_instr *intr) override;
   void do_get_shader_info(r600_shader *sh_info) override;

   bool load_input(UNUSED nir_intrinsic_instr *intr) override
   {
      unreachable("load_input must be lowered in TES");
   };
   bool store_output(UNUSED nir_intrinsic_instr *intr) override
   {
      unreachable("load_output must be lowered in TES");
   };

   bool read_prop(std::istream& is) override;
   void do_print_properties(std::ostream& os) const override;

   void do_finalize() override;

   PRegister m_tess_coord[2] = {nullptr, nullptr};
   PRegister m_rel_patch_id{nullptr};
   PRegister m_primitive_id{nullptr};

   VertexExportStage *m_export_processor{nullptr};

   int m_tcs_vertices_out{0};
   bool m_vs_as_gs_a{false};
   bool m_tes_as_es{false};
};

} // namespace r600

#endif // TCS_H