viewport.hpp

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#pragma once
#include <kvf/rect.hpp>
#include <variant>
 
namespace le {
namespace viewport {
struct Dynamic {
    kvf::UvRect n_rect{kvf::uv_rect_v};
};
 
struct Letterbox {
    [[nodiscard]] auto fill_target_space(glm::vec2 target_size) const -> glm::vec2;
    [[nodiscard]] auto unproject_target_space(glm::vec2 target_size) const -> glm::vec2;
 
    glm::vec2 world_size{800.0f, 600.0f};
};
} // namespace viewport
 
using Viewport = std::variant<viewport::Dynamic, viewport::Letterbox>;
} // namespace le