static_mesh_material_subrenderer.hpp

// SPDX-License-Identifier: MIT
#ifndef LIBSBX_MODELS_STATIC_MESH_MATERIAL_SUBRENDERER_HPP_
#define LIBSBX_MODELS_STATIC_MESH_MATERIAL_SUBRENDERER_HPP_
 
#include <cstddef>
#include <filesystem>
#include <unordered_set>
#include <ranges>
#include <algorithm>
 
#include <easy/profiler.h>
 
#include <fmt/format.h>
 
#include <range/v3/view/enumerate.hpp>
 
#include <libsbx/utility/logger.hpp>
#include <libsbx/utility/enum.hpp>
 
#include <libsbx/reflection/description.hpp>
 
#include <libsbx/memory/tracking_allocator.hpp>
 
#include <libsbx/containers/octree.hpp>
 
#include <libsbx/math/color.hpp>
#include <libsbx/math/vector3.hpp>
#include <libsbx/math/matrix4x4.hpp>
#include <libsbx/math/volume.hpp>
 
#include <libsbx/utility/logger.hpp>
#include <libsbx/utility/timer.hpp>
#include <libsbx/utility/layout.hpp>
#include <libsbx/utility/iterator.hpp>
 
#include <libsbx/core/engine.hpp>
 
#include <libsbx/graphics/graphics_module.hpp>
#include <libsbx/graphics/subrenderer.hpp>
#include <libsbx/graphics/draw_list.hpp>
 
#include <libsbx/graphics/pipeline/pipeline.hpp>
#include <libsbx/graphics/pipeline/graphics_pipeline.hpp>
 
#include <libsbx/graphics/descriptor/descriptor_handler.hpp>
 
#include <libsbx/graphics/buffers/uniform_handler.hpp>
#include <libsbx/graphics/buffers/storage_handler.hpp>
#include <libsbx/graphics/buffers/storage_buffer.hpp>
 
#include <libsbx/graphics/images/image2d.hpp>
#include <libsbx/graphics/images/separate_image2d_array.hpp>
#include <libsbx/graphics/images/sampler_state.hpp>
 
#include <libsbx/assets/assets_module.hpp>
 
#include <libsbx/scenes/scenes_module.hpp>
#include <libsbx/scenes/scene.hpp>
#include <libsbx/scenes/node.hpp>
 
#include <libsbx/scenes/components/static_mesh.hpp>
#include <libsbx/scenes/components/id.hpp>
#include <libsbx/scenes/components/camera.hpp>
#include <libsbx/scenes/components/tag.hpp>
#include <libsbx/scenes/components/point_light.hpp>
#include <libsbx/scenes/components/global_transform.hpp>
 
#include <libsbx/models/vertex3d.hpp>
#include <libsbx/models/mesh.hpp>
#include <libsbx/models/material.hpp>
#include <libsbx/models/material_draw_list.hpp>
#include <libsbx/models/static_mesh_material_draw_list.hpp>
#include <libsbx/models/frustum_culling_task.hpp>
 
namespace sbx::models {
 
class static_mesh_material_subrenderer final : public graphics::subrenderer {
 
  inline static const auto pipeline_definition = graphics::pipeline_definition{
    .depth = graphics::depth::read_write,
    .uses_transparency = false,
    .rasterization_state = graphics::rasterization_state{
      .polygon_mode = graphics::polygon_mode::fill,
      .cull_mode = graphics::cull_mode::back,
      .front_face = graphics::front_face::counter_clockwise
    }
  };
 
  inline static constexpr auto default_pipeline_path = std::string_view{"engine://shaders/deferred_pbr_material"};
 
public:
 
  static_mesh_material_subrenderer(const std::vector<graphics::attachment_description>& attachments, const static_mesh_material_draw_list::bucket bucket, const std::filesystem::path& base_pipeline = default_pipeline_path);
 
  ~static_mesh_material_subrenderer() override;
 
  auto render(graphics::command_buffer& command_buffer) -> void override;
 
private:
 
  struct pipeline_data {
 
    graphics::graphics_pipeline_handle pipeline;
    graphics::push_handler push_handler;
 
    pipeline_data(const graphics::graphics_pipeline_handle& handle)
    : pipeline{handle},
      push_handler{pipeline} { }
 
  }; // struct pipeline_data
 
  struct descriptor_data {
 
    graphics::descriptor_handler scene_descriptor_handler;
    graphics::descriptor_handler sampler_descriptor_handler;
    graphics::descriptor_handler image_descriptor_handler;
 
    descriptor_data(const graphics::graphics_pipeline_handle& handle)
    : scene_descriptor_handler{handle, 0u},
      sampler_descriptor_handler{handle, 1u},
      image_descriptor_handler{handle, 2u} { }
 
  }; // struct descriptor_data
 
  auto _get_or_create_pipeline(const material_key& key) -> pipeline_data&;
 
  auto _get_or_create_descriptor_data(const graphics::graphics_pipeline_handle& handle) -> descriptor_data&;
 
  inline static const auto _entry_point = std::array<std::string, 3u>{
    "opaque_main",  // alpha_mode::opaque
    "mask_main",    // alpha_mode::mask 
    "blend_main"    // alpha_mode::blend
  };
 
  std::vector<graphics::attachment_description> _attachments;
  std::filesystem::path _base_pipeline;
  static_mesh_material_draw_list::bucket _bucket;
 
  inline static auto _pipeline_cache = std::unordered_map<material_key, pipeline_data, material_key_hash>{};
 
  std::unordered_map<graphics::graphics_pipeline_handle, descriptor_data> _descriptor_cache{};
 
}; // class static_mesh_subrenderer
 
} // namespace sbx::models
 
template<>
struct sbx::reflection::description<sbx::models::material_feature> {
 
  static constexpr auto name() -> std::string_view {
    return "material_feature";
  }
 
  static constexpr auto enumerators() {
    return std::make_tuple(
      enumerator{"cast_shadow", sbx::models::material_feature::cast_shadow},
      enumerator{"receive_shadow", sbx::models::material_feature::receive_shadow},
      enumerator{"invert_backface_normals", sbx::models::material_feature::invert_backface_normals}
    );
  }
 
}; // struct sbx::reflection::description<sbx::models::material_feature>
 
#endif // LIBSBX_MODELS_STATIC_MESH_MATERIAL_SUBRENDERER_HPP_