#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "esp_log.h"
#include "esp_check.h"
#include "driver/i2c_master.h"
#include "ssd1306.h"
#include "font8x8_basic.h"
#include "display_task.h"
#include "game/jump_bird_game.h"
#include "game/jump_bird_game_input_queue.h" // For xJumpBirdGameInputQueue
#define TAG "DISPLAY_TASK"
#define I2C_SDA_GPIO 19
#define I2C_SCL_GPIO 18
#define OLED_I2C_ADDRESS 0x3C
#define I2C_PORT I2C_NUM_1
#define I2C_SPEED_HZ 400000
#define OLED_WIDTH 128
#define OLED_HEIGHT 64
#define N_DISPLAY_LINES (OLED_HEIGHT / 8)
#define MAX_LINE_LENGTH (OLED_WIDTH / 8) + 1
SSD1306_t dev;
SemaphoreHandle_t xDisplayMutex = NULL;
static char display_lines[N_DISPLAY_LINES][MAX_LINE_LENGTH];
static bool dirty_lines[N_DISPLAY_LINES] = { true }; // Track which lines changed
typedef enum {
DISPLAY_STATE_INITIAL_MESSAGE,
DISPLAY_STATE_GAME_RUNNING,
DISPLAY_STATE_GAME_OVER,
DISPLAY_STATE_OTHER_INFO
} display_state_t;
static display_state_t s_current_display_state = DISPLAY_STATE_INITIAL_MESSAGE;
static int s_game_over_score = 0;
static int s_displayed_score = -1; // New: Tracks the score currently drawn on the display
static esp_err_t display_i2c_ng_init(void) {
i2c_master_bus_config_t bus_config = {
.clk_source = I2C_CLK_SRC_DEFAULT,
.i2c_port = I2C_PORT,
.scl_io_num = I2C_SCL_GPIO,
.sda_io_num = I2C_SDA_GPIO,
.flags = {
.enable_internal_pullup = true,
}
};
ESP_RETURN_ON_ERROR(i2c_new_master_bus(&bus_config, &dev._i2c_bus_handle), TAG, "Failed to create I2C bus");
i2c_device_config_t dev_cfg = {
.dev_addr_length = I2C_ADDR_BIT_LEN_7,
.device_address = OLED_I2C_ADDRESS,
.scl_speed_hz = I2C_SPEED_HZ,
};
ESP_RETURN_ON_ERROR(i2c_master_bus_add_device(dev._i2c_bus_handle, &dev_cfg, &dev._i2c_dev_handle), TAG, "Failed to add I2C OLED device");
return ESP_OK;
}
static void display_manager_task(void *pvParameters) {
ESP_LOGI(TAG, "Display Manager Task started.");
if (display_i2c_ng_init() != ESP_OK) {
ESP_LOGE(TAG, "I2C init failed, halting task.");
vTaskDelete(NULL);
}
ssd1306_init(&dev, OLED_WIDTH, OLED_HEIGHT);
ssd1306_clear_screen(&dev, false);
ssd1306_show_buffer(&dev);
while (1) {
if (xSemaphoreTake(xDisplayMutex, portMAX_DELAY) == pdTRUE) {
switch (s_current_display_state) {
case DISPLAY_STATE_INITIAL_MESSAGE: {
bool jump_signal_peek = false;
if (xJumpBirdGameInputQueue && xQueuePeek(xJumpBirdGameInputQueue, &jump_signal_peek, 0) == pdTRUE) {
if (jump_signal_peek) {
bool jump_signal_start = false;
xQueueReceive(xJumpBirdGameInputQueue, &jump_signal_start, 0);
if (jump_signal_start) {
s_current_display_state = DISPLAY_STATE_GAME_RUNNING;
jump_bird_init_game();
jump_bird_set_active(true);
// Removed ssd1306_clear_screen here.
// The score will be drawn due to s_displayed_score = -1,
// and jump_bird_draw_game will clear the game area.
s_displayed_score = -1; // Reset score display tracker for new game
}
}
}
for (int i = 0; i < N_DISPLAY_LINES; i++) {
if (dirty_lines[i] && strlen(display_lines[i]) > 0) {
ssd1306_display_text(&dev, i, display_lines[i], strlen(display_lines[i]), false);
dirty_lines[i] = false;
}
}
break;
}
case DISPLAY_STATE_GAME_RUNNING: {
if (jump_bird_is_active()) {
jump_bird_handle_input();
bool game_over = jump_bird_update_game_state();
jump_bird_draw_game(&dev); // This now only draws game elements
// Update score display only if it has changed
int current_game_score = jump_bird_get_score();
if (current_game_score != s_displayed_score) {
char score_str[MAX_LINE_LENGTH];
snprintf(score_str, sizeof(score_str), "Score: %d", current_game_score);
// Clear the entire line 0 before drawing the new score to avoid artifacts
ssd1306_display_text(&dev, 0, " ", strlen(" "), false); // Clear line 0
ssd1306_display_text(&dev, 0, score_str, strlen(score_str), false);
s_displayed_score = current_game_score;
}
if (game_over) {
s_game_over_score = current_game_score; // Use the final score
s_current_display_state = DISPLAY_STATE_GAME_OVER;
jump_bird_set_active(false);
ssd1306_clear_screen(&dev, false); // Keep this clear for game over screen
// Mark all lines dirty for the game over screen
for (int i = 0; i < N_DISPLAY_LINES; i++) {
dirty_lines[i] = true;
}
s_displayed_score = -1; // Reset score display tracker
}
} else {
// This block handles cases where the game might become inactive externally
// or if jump_bird_is_active() becomes false for other reasons.
s_game_over_score = jump_bird_get_score(); // Get final score
s_current_display_state = DISPLAY_STATE_GAME_OVER;
ssd1306_clear_screen(&dev, false); // Keep this clear for game over screen
for (int i = 0; i < N_DISPLAY_LINES; i++) {
dirty_lines[i] = true;
}
s_displayed_score = -1; // Reset score display tracker
}
break;
}
case DISPLAY_STATE_GAME_OVER: {
char score_display[MAX_LINE_LENGTH];
snprintf(score_display, sizeof(score_display), "Score: %d", s_game_over_score);
const char *game_over_messages[] = {
" GAME OVER! ",
" ",
score_display,
" ",
" Press button ",
" to Restart ",
NULL, NULL
};
for (int i = 0; i < N_DISPLAY_LINES; i++) {
if (game_over_messages[i] && dirty_lines[i]) {
ssd1306_display_text(&dev, i, game_over_messages[i], strlen(game_over_messages[i]), false);
dirty_lines[i] = false;
}
}
bool jump_signal_restart = false;
if (xJumpBirdGameInputQueue && xQueueReceive(xJumpBirdGameInputQueue, &jump_signal_restart, 0) == pdTRUE) {
if (jump_signal_restart) {
s_current_display_state = DISPLAY_STATE_GAME_RUNNING;
jump_bird_init_game();
jump_bird_set_active(true);
// Removed ssd1306_clear_screen here.
// The score will be drawn due to s_displayed_score = -1,
// and jump_bird_draw_game will clear the game area.
s_displayed_score = -1; // Reset score display tracker for new game
}
}
break;
}
case DISPLAY_STATE_OTHER_INFO: {
for (int i = 0; i < N_DISPLAY_LINES; i++) {
if (dirty_lines[i] && strlen(display_lines[i]) > 0) {
ssd1306_display_text(&dev, i, display_lines[i], strlen(display_lines[i]), false);
dirty_lines[i] = false;
}
}
break;
}
}
ssd1306_show_buffer(&dev); // Push the entire buffer to the display
xSemaphoreGive(xDisplayMutex);
}
vTaskDelay(pdMS_TO_TICKS(5));
}
}
void display_update_text(const char *lines[], size_t num_lines) {
if (xDisplayMutex == NULL) return;
if (xSemaphoreTake(xDisplayMutex, portMAX_DELAY) == pdTRUE) {
for (size_t i = 0; i < N_DISPLAY_LINES; i++) {
const char *new_line = (i < num_lines && lines[i]) ? lines[i] : "";
if (strncmp(display_lines[i], new_line, MAX_LINE_LENGTH) != 0) {
strncpy(display_lines[i], new_line, MAX_LINE_LENGTH - 1);
display_lines[i][MAX_LINE_LENGTH - 1] = '\0';
dirty_lines[i] = true;
}
}
xSemaphoreGive(xDisplayMutex);
}
}
esp_err_t start_display_task(void) {
xDisplayMutex = xSemaphoreCreateMutex();
if (xDisplayMutex == NULL) return ESP_FAIL;
xSemaphoreGive(xDisplayMutex);
// Initialize the display with "Score: 0"
const char *initial_lines[] = {"Score: 0"};
display_update_text(initial_lines, 1);
if (xTaskCreate(display_manager_task, "Display_Manager_Task", 4096, NULL, 5, NULL) != pdPASS) {
vSemaphoreDelete(xDisplayMutex);
return ESP_FAIL;
}
return ESP_OK;
}
