Baji_Rtc_Toy/main/dzbj/bg_gif_demo.c

/**
 * bg_gif_demo.c — 背景图 + 透明 GIF 叠加（方案 C 实现）
 */
#include "bg_gif_demo.h"
#include "fatfs.h"
#include "esp_log.h"
#include "esp_heap_caps.h"
#include "esp_lvgl_port.h"
#include "esp_spiffs.h"
#include "lvgl.h"
#include "jpeg_decoder.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

static const char *TAG = "BG_GIF";

// 运行时状态
static lv_obj_t    *g_bg_img = NULL;
static lv_obj_t    *g_gif_obj = NULL;
static uint8_t     *g_bg_data = NULL;       // 背景图解码后的 RGB565 buffer (PSRAM)
static uint8_t     *g_gif_data = NULL;      // GIF 文件二进制 (PSRAM)
static lv_img_dsc_t g_bg_dsc;
static lv_img_dsc_t g_gif_dsc;
static bool         g_running = false;

// 确保 SPIFFS 已挂载
static esp_err_t ensure_spiffs_mounted(void) {
    size_t total = 0, used = 0;
    if (esp_spiffs_info("storage", &total, &used) == ESP_OK) {
        return ESP_OK;
    }
    ESP_LOGI(TAG, "SPIFFS 未挂载，自动挂载...");
    esp_vfs_spiffs_conf_t conf = {
        .base_path = "/spiflash",
        .partition_label = "storage",
        .max_files = 5,
        .format_if_mount_failed = false,
    };
    return esp_vfs_spiffs_register(&conf);
}

// 加载 GIF 文件到 PSRAM
static esp_err_t load_gif_to_psram(const char *path) {
    FILE *f = fopen(path, "rb");
    if (!f) {
        ESP_LOGE(TAG, "GIF 打开失败: %s", path);
        return ESP_FAIL;
    }
    fseek(f, 0, SEEK_END);
    size_t sz = ftell(f);
    fseek(f, 0, SEEK_SET);

    g_gif_data = heap_caps_malloc(sz, MALLOC_CAP_SPIRAM);
    if (!g_gif_data) {
        ESP_LOGE(TAG, "GIF PSRAM 分配失败: %d bytes", (int)sz);
        fclose(f);
        return ESP_ERR_NO_MEM;
    }
    if (fread(g_gif_data, 1, sz, f) != sz) {
        heap_caps_free(g_gif_data);
        g_gif_data = NULL;
        fclose(f);
        return ESP_FAIL;
    }
    fclose(f);

    // 构造 GIF 的 lv_img_dsc_t（CF_RAW，由 LVGL gifdec 解码）
    memset(&g_gif_dsc, 0, sizeof(g_gif_dsc));
    g_gif_dsc.header.cf = LV_IMG_CF_RAW;
    g_gif_dsc.data_size = sz;
    g_gif_dsc.data = g_gif_data;

    ESP_LOGI(TAG, "GIF 已加载到 PSRAM: %s (%.1f KB)", path, sz / 1024.0);
    return ESP_OK;
}

// 加载并解码背景 JPG 到 RGB565 buffer
static esp_err_t load_bg_jpg(const char *path) {
    esp_jpeg_image_output_t outdata;
    esp_err_t ret = DecodeImg((char *)path, &g_bg_data, &outdata);
    if (ret != ESP_OK || !g_bg_data) {
        ESP_LOGE(TAG, "背景图解码失败: %s, err=%s", path, esp_err_to_name(ret));
        return ESP_FAIL;
    }

    // 构造 lv_img_dsc_t（TRUE_COLOR，已解码 RGB565）
    memset(&g_bg_dsc, 0, sizeof(g_bg_dsc));
    g_bg_dsc.header.cf = LV_IMG_CF_TRUE_COLOR;
    g_bg_dsc.header.w = outdata.width;
    g_bg_dsc.header.h = outdata.height;
    g_bg_dsc.data_size = outdata.width * outdata.height * 2;
    g_bg_dsc.data = g_bg_data;

    ESP_LOGI(TAG, "背景图已解码: %dx%d (%.1f KB RGB565)",
             outdata.width, outdata.height, g_bg_dsc.data_size / 1024.0);
    return ESP_OK;
}

esp_err_t bg_gif_demo_start(const char *bg_jpg_path, const char *gif_path) {
    if (g_running) {
        ESP_LOGW(TAG, "已在运行，先 stop");
        return ESP_ERR_INVALID_STATE;
    }

    if (ensure_spiffs_mounted() != ESP_OK) {
        ESP_LOGE(TAG, "SPIFFS 挂载失败");
        return ESP_FAIL;
    }

    // 1. 加载背景图（一次性，常驻）
    if (load_bg_jpg(bg_jpg_path) != ESP_OK) {
        return ESP_FAIL;
    }

    // 2. 加载 GIF
    if (load_gif_to_psram(gif_path) != ESP_OK) {
        free(g_bg_data);
        g_bg_data = NULL;
        return ESP_FAIL;
    }

    // 3. 在 LVGL 任务中创建图层
    if (!lvgl_port_lock(200)) {
        ESP_LOGE(TAG, "lvgl_port_lock 失败");
        return ESP_FAIL;
    }

    // 底层：背景图（lv_img）
    g_bg_img = lv_img_create(lv_scr_act());
    lv_img_set_src(g_bg_img, &g_bg_dsc);
    lv_obj_align(g_bg_img, LV_ALIGN_CENTER, 0, 0);

    // 上层：透明 GIF（lv_gif，自动叠加在 bg_img 之上）
    g_gif_obj = lv_gif_create(lv_scr_act());
    lv_gif_set_src(g_gif_obj, &g_gif_dsc);
    // 240×360 GIF 在 360×360 屏幕中居中显示
    lv_obj_align(g_gif_obj, LV_ALIGN_CENTER, 0, 0);

    lvgl_port_unlock();

    g_running = true;
    ESP_LOGI(TAG, "✓ 背景 + GIF 叠加显示启动");
    return ESP_OK;
}

void bg_gif_demo_stop(void) {
    if (!g_running) return;
    g_running = false;

    if (lvgl_port_lock(200)) {
        if (g_gif_obj) {
            lv_obj_del(g_gif_obj);
            g_gif_obj = NULL;
        }
        if (g_bg_img) {
            lv_obj_del(g_bg_img);
            g_bg_img = NULL;
        }
        lvgl_port_unlock();
    }

    if (g_bg_data) {
        free(g_bg_data);
        g_bg_data = NULL;
    }
    if (g_gif_data) {
        heap_caps_free(g_gif_data);
        g_gif_data = NULL;
    }
    ESP_LOGI(TAG, "已停止并释放资源");
}

bool bg_gif_demo_is_running(void) {
    return g_running;
}