[READ-ONLY] Mirror of https://github.com/bombshell-dev/tty. Platform independent 2D layout engine for terminal applications based on Clay
ref(wasm): use brotli-11 + z85 wasm encoding
Nate Moore
(May 31, 2026, 11:51 PM -0500)
a02ffade
02754a27
+53
-7
+53
-7
tasks/bundle-wasm.ts
+53
-7
tasks/bundle-wasm.ts
···
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import { encodeBase64 } from "@std/encoding/base64";
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import { brotliCompressSync, constants } from "node:zlib";
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const Z85 =
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"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-:+=^!/*?&<>()[]{}@%$#";
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function encodeZ85(data: Uint8Array): string {
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let padLen = (4 - (data.length % 4)) % 4;
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let src = data;
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if (padLen > 0) {
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src = new Uint8Array(data.length + padLen);
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src.set(data);
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}
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let out: string[] = [];
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for (let i = 0; i < src.length; i += 4) {
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let v =
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src[i] * 16777216 +
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src[i + 1] * 65536 +
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src[i + 2] * 256 +
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src[i + 3];
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out.push(
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Z85[Math.floor(v / 52200625)],
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Z85[Math.floor(v / 614125) % 85],
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Z85[Math.floor(v / 7225) % 85],
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Z85[Math.floor(v / 85) % 85],
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Z85[v % 85],
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);
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}
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return out.join("");
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}
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const wasm = await Deno.readFile("clayterm.wasm");
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const base64 = encodeBase64(wasm);
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const compressed = new Uint8Array(
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brotliCompressSync(wasm, {
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params: {
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[constants.BROTLI_PARAM_QUALITY]: 11,
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[constants.BROTLI_PARAM_SIZE_HINT]: wasm.length,
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[constants.BROTLI_PARAM_LGWIN]: 24,
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},
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}),
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);
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const source = `const bin = atob("${base64}");
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const bytes = new Uint8Array(bin.length);
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for (let i = 0; i < bin.length; i++) bytes[i] = bin.charCodeAt(i);
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export const compiled = await WebAssembly.compile(bytes);
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const z85 = encodeZ85(compressed);
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// Decoder uses division instead of >>> to avoid 32-bit truncation on values near 0xFFFFFFFF.
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const source = `import{brotliDecompressSync}from"node:zlib";
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const Z="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-:+=^!/*?&<>()[]{}@%$#";
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const T=new Uint8Array(128);for(let i=0;i<85;i++)T[Z.charCodeAt(i)]=i;
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function d(s:string,n:number){const b=new Uint8Array(n);let o=0;for(let i=0;i<s.length&&o<n;i+=5){const v=T[s.charCodeAt(i)]*52200625+T[s.charCodeAt(i+1)]*614125+T[s.charCodeAt(i+2)]*7225+T[s.charCodeAt(i+3)]*85+T[s.charCodeAt(i+4)];if(o<n)b[o++]=Math.floor(v/16777216);if(o<n)b[o++]=Math.floor(v/65536)%256;if(o<n)b[o++]=Math.floor(v/256)%256;if(o<n)b[o++]=v%256;}return b;}
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const compressed=d(${JSON.stringify(z85)},${compressed.byteLength});
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export const compiled=await WebAssembly.compile(new Uint8Array(brotliDecompressSync(compressed)));
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`;
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await Deno.writeTextFile("wasm.ts", source);
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console.log(`wrote wasm.ts (${wasm.length} bytes encoded)`);
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console.log(
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`wrote wasm.ts (${wasm.length} → ${compressed.byteLength} bytes compressed, ${z85.length} bytes z85, ${
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Math.round(z85.length / wasm.length * 100)
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}%)`,
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);