compute.readback.readF32¶
Summary¶
compute.readback.readF32 reads f32 elements from a GPU source and returns a Float32Array.
Offsets and counts are specified in elements, not bytes.
Use this for common float-result readback after compute dispatches.
Syntax¶
WasmGPU.compute.readback.readF32(src: ReadbackSource, elemOffset?: number, elemCount?: number, opts?: { label?: string }): Promise<Float32Array>
const out = await wgpu.compute.readback.readF32(src, elemOffset, elemCount, opts);
Parameters¶
| Name | Type | Required | Description |
|---|---|---|---|
src |
ReadbackSource |
Yes | Source GPU buffer to read from. |
elemOffset |
number |
No | Element offset within the source (default 0). |
elemCount |
number |
No | Number of f32 elements to read (default reads remaining elements). |
opts |
{ label?: string } |
No | Optional debug label for copy instrumentation. |
Returns¶
Promise<Float32Array> - Resolves to float data read from GPU memory.
Example¶
const canvas = document.querySelector("canvas");
const wgpu = await WasmGPU.create(canvas);
const storage = wgpu.compute.createStorageBuffer({ data: new Float32Array([5, 10, 15, 20]), copySrc: true });
const out = await wgpu.compute.readback.readF32(storage, 1, 2);
console.log(Array.from(out));