prism/engine/core/include/app.hpp

#pragma once

class GFXCommandBuffer;

namespace prism {
    class engine;

    /// The base class for any Prism application.
    class app {
    public:
        /// Called when a render context is available.
        virtual void initialize_render() {}

        /// Called when the engine is about to quit. Should be overriden if an app needs to save data before qutting.
        virtual void prepare_quit() {}

        /// Called to check whether or not an app should intervene quitting.
        virtual bool should_quit() {
            return true;
        }

        /// Called when a engine starts a new frame. Typically used for inserting new imgui windows.
        virtual void begin_frame() {}

        /** Called during the engine's update cycle.
         @param delta_time Delta time in milliseconds.
         */
        virtual void update([[maybe_unused]] const float delta_time) {}

        virtual void render([[maybe_unused]] GFXCommandBuffer* command_buffer) {}

        virtual bool wants_no_scene_rendering() { return false; }
    };
}

/// This is an app's equivalent of main(). You can check command line arguments through Engine::command_line_arguments.
void app_main(prism::engine* engine);