103 lines
2.9 KiB
JavaScript
103 lines
2.9 KiB
JavaScript
"use strict";
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class ViewableBuffer {
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constructor(sizeOrBuffer) {
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if (typeof sizeOrBuffer === "number") {
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this.rawBinaryData = new ArrayBuffer(sizeOrBuffer);
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} else if (sizeOrBuffer instanceof Uint8Array) {
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this.rawBinaryData = sizeOrBuffer.buffer;
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} else {
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this.rawBinaryData = sizeOrBuffer;
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}
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this.uint32View = new Uint32Array(this.rawBinaryData);
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this.float32View = new Float32Array(this.rawBinaryData);
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this.size = this.rawBinaryData.byteLength;
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}
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/** View on the raw binary data as a `Int8Array`. */
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get int8View() {
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if (!this._int8View) {
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this._int8View = new Int8Array(this.rawBinaryData);
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}
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return this._int8View;
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}
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/** View on the raw binary data as a `Uint8Array`. */
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get uint8View() {
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if (!this._uint8View) {
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this._uint8View = new Uint8Array(this.rawBinaryData);
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}
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return this._uint8View;
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}
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/** View on the raw binary data as a `Int16Array`. */
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get int16View() {
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if (!this._int16View) {
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this._int16View = new Int16Array(this.rawBinaryData);
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}
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return this._int16View;
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}
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/** View on the raw binary data as a `Int32Array`. */
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get int32View() {
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if (!this._int32View) {
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this._int32View = new Int32Array(this.rawBinaryData);
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}
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return this._int32View;
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}
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/** View on the raw binary data as a `Float64Array`. */
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get float64View() {
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if (!this._float64Array) {
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this._float64Array = new Float64Array(this.rawBinaryData);
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}
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return this._float64Array;
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}
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/** View on the raw binary data as a `BigUint64Array`. */
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get bigUint64View() {
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if (!this._bigUint64Array) {
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this._bigUint64Array = new BigUint64Array(this.rawBinaryData);
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}
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return this._bigUint64Array;
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}
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/**
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* Returns the view of the given type.
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* @param type - One of `int8`, `uint8`, `int16`,
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* `uint16`, `int32`, `uint32`, and `float32`.
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* @returns - typed array of given type
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*/
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view(type) {
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return this[`${type}View`];
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}
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/** Destroys all buffer references. Do not use after calling this. */
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destroy() {
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this.rawBinaryData = null;
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this._int8View = null;
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this._uint8View = null;
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this._int16View = null;
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this.uint16View = null;
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this._int32View = null;
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this.uint32View = null;
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this.float32View = null;
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}
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/**
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* Returns the size of the given type in bytes.
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* @param type - One of `int8`, `uint8`, `int16`,
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* `uint16`, `int32`, `uint32`, and `float32`.
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* @returns - size of the type in bytes
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*/
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static sizeOf(type) {
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switch (type) {
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case "int8":
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case "uint8":
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return 1;
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case "int16":
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case "uint16":
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return 2;
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case "int32":
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case "uint32":
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case "float32":
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return 4;
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default:
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throw new Error(`${type} isn't a valid view type`);
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}
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}
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}
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export { ViewableBuffer };
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//# sourceMappingURL=ViewableBuffer.mjs.map
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