[READ-ONLY] Mirror of https://github.com/bombshell-dev/tty. Platform independent 2D layout engine for terminal applications based on Clay
Merge pull request #50 from bombshell-dev/ref/brotli-z85
🧼 compress bundled wasm with brotli + z85 encoding
authored by
Nate Moore
and committed by
GitHub
(Jun 1, 2026, 3:23 PM EDT)
ebaf397f
02754a27
+52
-7
+52
-7
tasks/bundle-wasm.ts
+52
-7
tasks/bundle-wasm.ts
···
1
-
import { encodeBase64 } from "@std/encoding/base64";
1
+
import { brotliCompressSync, constants } from "node:zlib";
2
+
3
+
const Z85 =
4
+
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-:+=^!/*?&<>()[]{}@%$#";
5
+
6
+
function encodeZ85(data: Uint8Array): string {
7
+
let padLen = (4 - (data.length % 4)) % 4;
8
+
let src = data;
9
+
if (padLen > 0) {
10
+
src = new Uint8Array(data.length + padLen);
11
+
src.set(data);
12
+
}
13
+
let out: string[] = [];
14
+
for (let i = 0; i < src.length; i += 4) {
15
+
let v = src[i] * 16777216 +
16
+
src[i + 1] * 65536 +
17
+
src[i + 2] * 256 +
18
+
src[i + 3];
19
+
out.push(
20
+
Z85[Math.floor(v / 52200625)],
21
+
Z85[Math.floor(v / 614125) % 85],
22
+
Z85[Math.floor(v / 7225) % 85],
23
+
Z85[Math.floor(v / 85) % 85],
24
+
Z85[v % 85],
25
+
);
26
+
}
27
+
return out.join("");
28
+
}
2
29
3
30
const wasm = await Deno.readFile("clayterm.wasm");
4
-
const base64 = encodeBase64(wasm);
31
+
32
+
const compressed = new Uint8Array(
33
+
brotliCompressSync(wasm, {
34
+
params: {
35
+
[constants.BROTLI_PARAM_QUALITY]: 11,
36
+
[constants.BROTLI_PARAM_SIZE_HINT]: wasm.length,
37
+
[constants.BROTLI_PARAM_LGWIN]: 24,
38
+
},
39
+
}),
40
+
);
41
+
42
+
const z85 = encodeZ85(compressed);
5
43
6
-
const source = `const bin = atob("${base64}");
7
-
const bytes = new Uint8Array(bin.length);
8
-
for (let i = 0; i < bin.length; i++) bytes[i] = bin.charCodeAt(i);
9
-
export const compiled = await WebAssembly.compile(bytes);
44
+
// Decoder uses division instead of >>> to avoid 32-bit truncation on values near 0xFFFFFFFF.
45
+
const source = `import{brotliDecompressSync}from"node:zlib";
46
+
const Z="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-:+=^!/*?&<>()[]{}@%$#";
47
+
const T=new Uint8Array(128);for(let i=0;i<85;i++)T[Z.charCodeAt(i)]=i;
48
+
function d(s:string,n:number){const b=new Uint8Array(n);let o=0;for(let i=0;i<s.length&&o<n;i+=5){const v=T[s.charCodeAt(i)]*52200625+T[s.charCodeAt(i+1)]*614125+T[s.charCodeAt(i+2)]*7225+T[s.charCodeAt(i+3)]*85+T[s.charCodeAt(i+4)];if(o<n)b[o++]=Math.floor(v/16777216);if(o<n)b[o++]=Math.floor(v/65536)%256;if(o<n)b[o++]=Math.floor(v/256)%256;if(o<n)b[o++]=v%256;}return b;}
49
+
const compressed=d(${JSON.stringify(z85)},${compressed.byteLength});
50
+
export const compiled=await WebAssembly.compile(new Uint8Array(brotliDecompressSync(compressed)));
10
51
`;
11
52
12
53
await Deno.writeTextFile("wasm.ts", source);
13
-
console.log(`wrote wasm.ts (${wasm.length} bytes encoded)`);
54
+
console.log(
55
+
`wrote wasm.ts (${wasm.length} → ${compressed.byteLength} bytes compressed, ${z85.length} bytes z85, ${
56
+
Math.round(z85.length / wasm.length * 100)
57
+
}%)`,
58
+
);