export module ra3.webgpu;

import std;

export import ra3.core;
export import ra3.render;
export import ra3.client;

/**
 * Fallback WebGPU backend for builds without Emscripten. `init` fails so the
 * caller can select another display; the class name matches the real
 * `ra3.webgpu` module so the backend factory in `ra3.display` compiles
 * unchanged.
 */
export namespace ra3::webgpu {
    class webgpu_display final : public ra3::client::display {
    public:
        [[nodiscard]] auto init(const ra3::client::display_options &) -> bool override { return false; }
        [[nodiscard]] auto present(const ra3::render::image &, const ra3::render::view_rect &, bool) -> bool override { return false; }
        [[nodiscard]] auto poll_event(ra3::render::ui_event &) -> bool override { return false; }
        [[nodiscard]] auto window_size() const -> std::pair<int, int> override { return {0, 0}; }
        [[nodiscard]] auto key_down(ra3::render::ui_key) const -> bool override { return false; }
        auto shutdown() -> void override {}
        [[nodiscard]] auto name() const -> std::string_view override { return "webgpu(null)"; }
    };
}