playcanvas/build/playcanvas.dbg/src/platform/graphics/webgpu/webgpu-index-buffer.js

PlayCanvas WebGL game engine

import { Debug } from '../../../core/debug.js';
import { BUFFERUSAGE_INDEX, BUFFERUSAGE_STORAGE, INDEXFORMAT_UINT8, INDEXFORMAT_UINT16 } from '../constants.js';
import { WebgpuBuffer } from './webgpu-buffer.js';

/**
 * A WebGPU implementation of the IndexBuffer.
 *
 * @ignore
 */ class WebgpuIndexBuffer extends WebgpuBuffer {
    constructor(indexBuffer, options){
        super(BUFFERUSAGE_INDEX | (options?.storage ? BUFFERUSAGE_STORAGE : 0)), this.format = null;
        Debug.assert(indexBuffer.format !== INDEXFORMAT_UINT8, 'WebGPU does not support 8-bit index buffer format');
        this.format = indexBuffer.format === INDEXFORMAT_UINT16 ? 'uint16' : 'uint32';
    }
    unlock(indexBuffer) {
        const device = indexBuffer.device;
        super.unlock(device, indexBuffer.storage);
    }
}

export { WebgpuIndexBuffer };