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fix: Lazy buffer views in bitcast to allow for polyfill #2769

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fix: Lazy buffer views in bitcast to allow for polyfill #2769

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22 changes: 18 additions & 4 deletions packages/typegpu/src/std/bitcast.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -201,11 +201,25 @@ const bitcastAllowedSchemas = [
type BitcastAllowedTypes = (typeof bitcastAllowedSchemas)[number];

const buffer = new ArrayBuffer(16);
const bufViewCache = {
f32: undefined as Float32Array | undefined,
u32: undefined as Uint32Array | undefined,
i32: undefined as Int32Array | undefined,
f16: undefined as Float16Array | undefined,
};
const bufViews = {
f32: new Float32Array(buffer),
u32: new Uint32Array(buffer),
i32: new Int32Array(buffer),
f16: new Float16Array(buffer),
get f32() {
return (bufViewCache['f32'] ??= new Float32Array(buffer));
},
get u32() {
return (bufViewCache['u32'] ??= new Uint32Array(buffer));
},
get i32() {
return (bufViewCache['i32'] ??= new Int32Array(buffer));
},
get f16() {
return (bufViewCache['f16'] ??= new Float16Array(buffer));
},
};

function writeToBuffer(
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