ng7-pica/esm5/lib/ngx-pica-exif.service.js

Angular module to resize images files in browser

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,uselessCode} checked by tsc
 */
import { Injectable } from '@angular/core';
import * as EXIF from 'exif-js';
var NgxPicaExifService = /** @class */ (function () {
    function NgxPicaExifService() {
    }
    /**
     * @param {?} image
     * @return {?}
     */
    NgxPicaExifService.prototype.getExifOrientedImage = /**
     * @param {?} image
     * @return {?}
     */
    function (image) {
        return new Promise(function (resolve, reject) {
            EXIF.getData((/** @type {?} */ (image)), function () {
                /** @type {?} */
                var allExifMetaData = EXIF.getAllTags(image);
                /** @type {?} */
                var exifOrientation = allExifMetaData.Orientation;
                if (exifOrientation) {
                    if (!/^[1-8]$/.test(exifOrientation)) {
                        throw new Error('orientation should be [1-8]');
                    }
                    /** @type {?} */
                    var canvas = document.createElement('canvas');
                    /** @type {?} */
                    var ctx = canvas.getContext('2d');
                    /** @type {?} */
                    var deg = 0;
                    /** @type {?} */
                    var cx = 0;
                    /** @type {?} */
                    var cy = 0;
                    /** @type {?} */
                    var width = image.width;
                    /** @type {?} */
                    var height = image.height;
                    if ([5, 6, 7, 8].indexOf(exifOrientation) > -1) {
                        width = image.height;
                        height = image.width;
                    }
                    canvas.width = width;
                    canvas.height = height;
                    switch (exifOrientation) {
                        case 3:
                        case 4:
                            cx = -image.width;
                            cy = -image.height;
                            deg = 180;
                            break;
                        case 5:
                        case 6:
                            cy = -image.height;
                            deg = 90;
                            break;
                        case 7:
                        case 8:
                            cx = -image.width;
                            deg = 270;
                            break;
                        default:
                            break;
                    }
                    if ([2, 4, 5, 7].indexOf(exifOrientation) > -1) {
                        ctx.translate(width, 0);
                        ctx.scale(-1, 1);
                    }
                    ctx.rotate(deg / 180 * Math.PI);
                    ctx.drawImage(image, cx, cy);
                    /** @type {?} */
                    var img_1 = new Image();
                    img_1.width = width;
                    img_1.height = height;
                    img_1.onload = function () {
                        resolve(img_1);
                    };
                    img_1.src = canvas.toDataURL();
                }
                else {
                    resolve(image);
                }
            });
        });
    };
    NgxPicaExifService.decorators = [
        { type: Injectable }
    ];
    return NgxPicaExifService;
}());
export { NgxPicaExifService };

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