renderer.hpp

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#pragma once
#include "le2d/primitive.hpp"
#include "le2d/render_instance.hpp"
#include "le2d/render_stats.hpp"
#include "le2d/resource/shader.hpp"
#include "le2d/unprojector.hpp"
#include "le2d/user_draw_data.hpp"
#include "le2d/viewport.hpp"
#include <klib/base_types.hpp>
#include <kvf/rect.hpp>
#include <kvf/render_pass_fwd.hpp>
#include <kvf/render_target.hpp>
 
namespace le {
class IRenderer : public klib::Polymorphic {
  public:
    static constexpr auto min_size_v{32};
    static constexpr auto max_size_v{4 * 4096};
 
    using UserData = UserDrawData;
 
    [[nodiscard]] virtual auto command_buffer() const -> vk::CommandBuffer = 0;
    [[nodiscard]] virtual auto get_stats() const -> RenderStats const& = 0;
 
    [[nodiscard]] auto is_rendering() const -> bool { return command_buffer() != vk::CommandBuffer{}; }
 
    virtual auto begin_render(vk::CommandBuffer command_buffer, glm::ivec2 size, kvf::Color clear = kvf::black_v) -> bool = 0;
    virtual auto end_render() -> kvf::RenderTarget const& = 0;
 
    [[nodiscard]] virtual auto framebuffer_size() const -> glm::ivec2 = 0;
 
    virtual void set_line_width(float width) = 0;
    virtual void set_shader(IShader const& shader) = 0;
    virtual void set_user_data(UserDrawData const& user_data) = 0;
 
    virtual void draw(Primitive const& primitive, std::span<RenderInstance const> instances) = 0;
 
    [[nodiscard]] virtual auto unprojector() const -> Unprojector = 0;
 
    Transform view{};
    vk::PolygonMode polygon_mode{vk::PolygonMode::eFill};
    Viewport viewport{viewport::Dynamic{}};
    kvf::UvRect scissor_rect{kvf::uv_rect_v};
};
} // namespace le