image-in-browser/lib/exif/ifd-value/ifd-sshort-value.js

Package for encoding / decoding images, transforming images, applying filters, drawing primitives on images on the client side (no need for server Node.js)

import { IfdValue } from './ifd-value.js';
import { IfdValueType } from '../ifd-value-type.js';
import { ArrayUtils } from '../../common/array-utils.js';
export class IfdSShortValue extends IfdValue {
    get type() {
        return IfdValueType.sShort;
    }
    get length() {
        return this._value.length;
    }
    constructor(value) {
        super();
        if (typeof value === 'number') {
            this._value = new Int16Array(1);
            this._value[0] = value;
        }
        else {
            this._value = Int16Array.from(value);
        }
    }
    static data(data, length) {
        const array = new Int16Array(length);
        for (let i = 0; i < length; ++i) {
            array[i] = data.readInt16();
        }
        return new IfdSShortValue(array);
    }
    toInt(index = 0) {
        return this._value[index];
    }
    toData() {
        return new Uint8Array(this._value.buffer);
    }
    write(out) {
        const v = new Int16Array(1);
        const vb = new Uint16Array(v.buffer);
        for (let i = 0, l = this._value.length; i < l; ++i) {
            v[0] = this._value[i];
            out.writeUint16(vb[0]);
        }
    }
    setInt(v, index = 0) {
        this._value[index] = v;
    }
    equals(other) {
        return (other instanceof IfdSShortValue &&
            this.length === other.length &&
            ArrayUtils.equals(this._value, other._value));
    }
    clone() {
        return new IfdSShortValue(this._value);
    }
    toString() {
        return `${this.constructor.name} (${this._value.length === 1 ? `${this._value[0]}` : `${this._value}`})`;
    }
}
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