playcanvas/build/playcanvas/src/platform/graphics/webgl/webgl-index-buffer.js

Open-source WebGL/WebGPU 3D engine for the web

import { INDEXFORMAT_UINT8, INDEXFORMAT_UINT16, INDEXFORMAT_UINT32 } from '../constants.js';
import { WebglBuffer } from './webgl-buffer.js';

class WebglIndexBuffer extends WebglBuffer {
		unlock(indexBuffer) {
				const device = indexBuffer.device;
				super.unlock(device, indexBuffer.usage, device.gl.ELEMENT_ARRAY_BUFFER, indexBuffer.storage);
		}
		constructor(indexBuffer){
				super();
				const gl = indexBuffer.device.gl;
				const format = indexBuffer.format;
				if (format === INDEXFORMAT_UINT8) {
						this.glFormat = gl.UNSIGNED_BYTE;
				} else if (format === INDEXFORMAT_UINT16) {
						this.glFormat = gl.UNSIGNED_SHORT;
				} else if (format === INDEXFORMAT_UINT32) {
						this.glFormat = gl.UNSIGNED_INT;
				}
		}
}

export { WebglIndexBuffer };