Momentum-Apps/jetpack.c

#include <stdlib.h>

#include <furi.h>
#include <gui/gui.h>
#include <gui/icon_animation.h>
#include <input/input.h>

#define TAG "Jetpack Joyride"

typedef enum {
    GameStateLife,
    GameStateGameOver,
} State;

typedef struct {
    int points;
    State state;
    FuriMutex* mutex;
} GameState;

typedef enum {
    EventTypeTick,
    EventTypeKey,
} EventType;

typedef struct {
    EventType type;
    InputEvent input;
} GameEvent;

static void jetpack_game_state_init(GameState* const game_state) {
    UNUSED(game_state);
}

static void jetpack_game_state_free(GameState* const game_state) {
    free(game_state);
}

static void jetpack_game_tick(GameState* const game_state) {
    if(game_state->state == GameStateLife) {
        // Do jetpack things
    }
}

static void jetpack_game_render_callback(Canvas* const canvas, void* ctx) {
    furi_assert(ctx);
    const GameState* game_state = ctx;
    furi_mutex_acquire(game_state->mutex, FuriWaitForever);

    canvas_draw_frame(canvas, 0, 0, 128, 64);

    if(game_state->state == GameStateLife) {
        // Draw scene
    }

    if(game_state->state == GameStateGameOver) {
        // Show highscore
    }

    furi_mutex_release(game_state->mutex);
}

static void jetpack_game_input_callback(InputEvent* input_event, FuriMessageQueue* event_queue) {
    furi_assert(event_queue);

    GameEvent event = {.type = EventTypeKey, .input = *input_event};
    furi_message_queue_put(event_queue, &event, FuriWaitForever);
}

static void jetpack_game_update_timer_callback(FuriMessageQueue* event_queue) {
    furi_assert(event_queue);

    GameEvent event = {.type = EventTypeTick};
    furi_message_queue_put(event_queue, &event, 0);
}

int32_t jetpack_game_app(void* p) {
    UNUSED(p);
    int32_t return_code = 0;

    FuriMessageQueue* event_queue = furi_message_queue_alloc(8, sizeof(GameEvent));

    GameState* game_state = malloc(sizeof(GameState));
    jetpack_game_state_init(game_state);

    game_state->mutex = furi_mutex_alloc(FuriMutexTypeNormal);
    if(!game_state->mutex) {
        FURI_LOG_E(TAG, "cannot create mutex\r\n");
        return_code = 255;
        goto free_and_exit;
    }

    // Set system callbacks
    ViewPort* view_port = view_port_alloc();
    view_port_draw_callback_set(view_port, jetpack_game_render_callback, game_state);
    view_port_input_callback_set(view_port, jetpack_game_input_callback, event_queue);

    FuriTimer* timer =
        furi_timer_alloc(jetpack_game_update_timer_callback, FuriTimerTypePeriodic, event_queue);
    furi_timer_start(timer, furi_kernel_get_tick_frequency() / 25);

    // Open GUI and register view_port
    Gui* gui = furi_record_open(RECORD_GUI);
    gui_add_view_port(gui, view_port, GuiLayerFullscreen);

    GameEvent event;
    for(bool processing = true; processing;) {
        FuriStatus event_status = furi_message_queue_get(event_queue, &event, 100);
        furi_mutex_acquire(game_state->mutex, FuriWaitForever);

        if(event_status == FuriStatusOk) {
            // press events
            if(event.type == EventTypeKey) {
                if(event.input.type == InputTypePress) {
                    switch(event.input.key) {
                    case InputKeyUp:
                        break;
                    case InputKeyDown:
                        break;
                    case InputKeyRight:
                        break;
                    case InputKeyLeft:
                        break;
                    case InputKeyOk:
                        if(game_state->state == GameStateGameOver) {
                            jetpack_game_state_init(game_state);
                        }

                        if(game_state->state == GameStateLife) {
                            // Do something
                        }

                        break;
                    case InputKeyBack:
                        processing = false;
                        break;
                    default:
                        break;
                    }
                }
            } else if(event.type == EventTypeTick) {
                jetpack_game_tick(game_state);
            }
        }

        view_port_update(view_port);
        furi_mutex_release(game_state->mutex);
    }

    furi_timer_free(timer);
    view_port_enabled_set(view_port, false);
    gui_remove_view_port(gui, view_port);
    furi_record_close(RECORD_GUI);
    view_port_free(view_port);
    furi_mutex_free(game_state->mutex);

free_and_exit:
    jetpack_game_state_free(game_state);
    furi_message_queue_free(event_queue);

    return return_code;
}