@antmjs/vantui/lib/image-cropper/utils.js

一套适用于Taro3及React的vantui组件库

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.rotateImage = rotateImage;
var _taro = require("@tarojs/taro");
function rotateImage(params) {
  return new Promise(function (resove) {
    var imageHeight = params.imageHeight,
      imageWidth = params.imageWidth,
      rotate = params.rotate,
      ctx = params.ctx,
      imagePath = params.imagePath,
      canvasId = params.canvasId;
    var canvasWidth, canvasHeight;
    if (rotate === 90 || rotate === 270) {
      canvasWidth = imageHeight;
      canvasHeight = imageWidth;
    } else {
      canvasWidth = imageWidth;
      canvasHeight = imageHeight;
    }
    ctx.clearRect(0, 0, canvasWidth, canvasHeight);
    ctx.translate(canvasWidth / 2, canvasHeight / 2);
    ctx.rotate(rotate * Math.PI / 180);
    ctx.drawImage(imagePath, -imageWidth / 2, -imageHeight / 2, imageWidth, imageHeight);
    ctx.translate(-canvasWidth / 2, -canvasHeight / 2);
    ctx.rotate(-rotate * Math.PI / 180);
    ctx.draw(false, function () {
      (0, _taro.canvasToTempFilePath)({
        canvasId: canvasId,
        success: function success(res) {
          resove(res.tempFilePath);
        },
        fail: function fail(err) {
          (0, _taro.hideLoading)();
          console.error('rotateImage fail', err);
        }
      });
    });
  });
}