wxmini/pages/piano/wallpaper/wallpaper.js

// pages/piano/wallpaper/wallpaper.js
const { deviceWallPaper } = require('../../../request/deviceListRequest')
// const sharp = require('sharp');
// const fs = require('fs');
const {
  BtHelper
} = require('../../../devices/bt_helper');
const { BtCmd } = require('../../../devices/bluetooth/bt_cmd');
import EventManager from '../../../utils/event_bus'
import { EnumCmdEvent, CmdEvent } from '../../../devices/cmd_key_event';

// import EventManager from '../../utils/event_bus'


Page({

  /**
   * 页面的初始数据
   */
  data: {
    topImg:
     {
//      pic: "",
//      id: "",
//      name: ""
    },
    imageList: [

    ],
    selectIndex: 0,
    nvabarData: {
      showCapsule: 1, //是否显示左上角图标   1表示显示    0表示不显示
      title: '壁纸设置', //导航栏 中间的标题
    },
    src: '',
    width: 250,//宽度
    height: 250,//高度
    _imageBuffer: null,

  }, footerTap() {
    const that = this;
    wx.chooseImage({
      count: 1, // 最多可以选择的图片张数
      sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有
      sourceType: ['album'], // 从相册选择
      success: function (res) {
        const tempFilePaths = res.tempFilePaths;
//         console.log('获取图片信息成功', res);
        // wx.cropImage({
        //   src: tempFilePaths[0], // 图片路径
        //   cropScale: '1:1', // 裁剪比例
        //   success: (res) => {
        //     console.log('裁剪成功', res);

        //     that.setData({
        //       src: res.tempFilePath
        //     })
        //   }
        // })

        wx.getImageInfo({
          src: tempFilePaths[0],
          success: function (imageInfo) {
            console.log('获取图片信息成功', imageInfo);
            //获取到image-cropper实例
            //开始裁剪
            that.setData({
              src: imageInfo.path,//要裁剪的图片
            })

          },
          fail: function (err) {
            console.error('获取图片信息失败', err);
          }
        });
      },
      fail: function (err) {
        console.error('选择图片失败', err);
      }
    });
  },


  async convertToRGB565(inputPath, outputPath) {
    try {
      // todo
      let sharp = null
      const metadata = await sharp(inputPath).metadata();
      const { width, height } = metadata;

      const buffer = await sharp(inputPath)
        .raw()
        .toBuffer();

      const outputBuffer = Buffer.alloc(width * height * 2); // 2 bytes per pixel for RGB565

      for (let y = 0; y < height; y++) {
        for (let x = 0; x < width; x++) {
          const index = (y * width + x) * 4; // RGBA
          const r = buffer[index];
          const g = buffer[index + 1];
          const b = buffer[index + 2];

          const r5 = (r >> 3) & 0x1F; // 5 bits for red
          const g6 = (g >> 2) & 0x3F; // 6 bits for green
          const b5 = (b >> 3) & 0x1F; // 5 bits for blue

          const rgb565 = (r5 << 11) | (g6 << 5) | b5;

          const outputIndex = (y * width + x) * 2;
          outputBuffer[outputIndex] = (rgb565 >> 8) & 0xFF; // High byte
          outputBuffer[outputIndex + 1] = rgb565 & 0xFF; // Low byte
        }
      }
      _this.data._imageBuffer = outputBuffer;
      _this.startImage()
      // fs.writeFileSync(outputPath, outputBuffer);
      console.log(`Conversion successful: ${outputPath}`);
    } catch (error) {
      console.error('Error converting image:', error);
    }
  },

  imageTap(e) {
    // console.log(e)
    // wxfile://tmp_d3e57489ead39c698676ff860df9cb8a37f66ee1a4777dbb.jpg
    let image = e.currentTarget.dataset.image;
    _this.setData({
      topImg: image ?? {}
    })
  }, wallpaperList() {
    let _this = this;
    deviceWallPaper().then(res => {
      console.log("壁纸列表", res);
      let data = res.data ?? []
      if (data.length == 0) {
        _this.setData({
          imageList: [],
          topImg: {},
        })
        return;
      }
      topImg = data[0];

      _this.setData({
        imageList: data ?? [],
        topImg: data[0] ?? {}
      })

    })
  },

  startImage() {
    BtHelper.sendData(BtCmd.wallPaper(1));
  },
  sendImage(imageBuffer) {
    let chunkSize = 20;
    for (let i = 0; i < imageBuffer.length; i += chunkSize) {
      const chunk = imageBuffer.slice(i, i + chunkSize);
      // this.sendImage(chunk);
      BtHelper.wallPaperData(chunk)
    }
  },
  endImage() {
    BtHelper.sendData(BtCmd.wallPaper(0));
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad(options) {
    let param = JSON.parse(options.param)
    console.log(param)
    this.wallpaperList();

    let _this = this;
    EventManager.addNotification(CmdEvent.eventName, function (event) {
      let name = event.cmdEvent;
      console.log("壁纸页：", event)
      switch (name) {
        case EnumCmdEvent.wallPaper:
          let otaCmd = event.wallPaper;
          let kind = event.kind;
          if (otaCmd === 1 && kind == 1) {
            // 开始发送
            _this.sendOtaData()
          } else if (otaCmd === 0 && kind == 1) {
            // 发送结束
            _this.endEnd()
          }
          break;
      }
    }, this)

  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady() {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow() {

  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide() {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload() {
    EventManager.removeNotification(CmdEvent.eventName, this);
  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh() {

  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom() {

  },

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage() {

  }
})