WasmGPU.compute.createStorageBuffer(...).canReadback¶

Summary¶

WasmGPU.compute.createStorageBuffer(...).canReadback reports whether a storage buffer can be copied back to CPU memory. This is true only when the buffer usage includes GPUBufferUsage.COPY_SRC. For buffers created through WasmGPU, that typically means copySrc: true in the descriptor. Use this as a quick guard before calling read or readAs.

Syntax¶

WasmGPU.compute.createStorageBuffer(...).canReadback: boolean
const ok = storage.canReadback;

Parameters¶

This API does not take parameters.

Returns¶

boolean - true when readback is supported for this storage buffer.

Example¶

const canvas = document.querySelector("canvas");
const wgpu = await WasmGPU.create(canvas);

const readable = wgpu.compute.createStorageBuffer({ data: new Float32Array(16), copySrc: true });
const writeOnly = wgpu.compute.createStorageBuffer({ data: new Float32Array(16), copySrc: false });

console.log(readable.canReadback, writeOnly.canReadback);