ethonion10/v86
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Allow initializing v86.wasm as brotli compressed buffer

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Example:

// brotli decompress wasm
import { BrotliDecode } from '../webassembly/brotli_decode.js';

const wasm_buffer = require('../v86/v86.wasm.br');
const wasm_uint8Array = new Uint8Array(wasm_buffer.data);
const decompressed_wasm = BrotliDecode(wasm_uint8Array);

const emulator = new V86Starter({
  wasm_buffer: decompressed_wasm,
This commit is contained in:
Kris Henriksen 2022-11-28 17:01:29 +07:00
parent 29eecb0ac8
commit 1dabee34e3
1 changed files with 58 additions and 48 deletions
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106
src/browser/starter.js
View file

@ -160,59 +160,69 @@ function V86Starter(options)
{
wasm_fn = env =>
{
return new Promise(resolve => {
return new Promise(async (resolve) => {
let v86_bin = DEBUG ? "v86-debug.wasm" : "v86.wasm";
let v86_bin_fallback = "v86-fallback.wasm";
if(options["wasm_path"])
{
v86_bin = options["wasm_path"];
const slash = v86_bin.lastIndexOf("/");
const dir = slash === -1 ? "" : v86_bin.substr(0, slash);
v86_bin_fallback = dir + "/" + v86_bin_fallback;
}
else if(typeof window === "undefined" && typeof __dirname === "string")
{
v86_bin = __dirname + "/" + v86_bin;
v86_bin_fallback = __dirname + "/" + v86_bin_fallback;
}
else
{
v86_bin = "build/" + v86_bin;
v86_bin_fallback = "build/" + v86_bin_fallback;
}
// provide int8Array which can be compressed
// and decompressed with brotli
if (options['wasm_buffer']) {
v86util.load_file(v86_bin, {
done: async bytes =>
{
try
{
const { instance } = await WebAssembly.instantiate(bytes, env);
resolve(instance.exports);
}
catch(err)
{
v86util.load_file(v86_bin_fallback, {
done: async bytes => {
const { instance } = await WebAssembly.instantiate(bytes, env);
resolve(instance.exports);
},
});
}
},
progress: e =>
{
this.emulator_bus.send("download-progress", {
file_index: 0,
file_count: 1,
file_name: v86_bin,
const { instance } = await WebAssembly.instantiate(options['wasm_buffer'], env);
resolve(instance.exports);
}
else {
lengthComputable: e.lengthComputable,
total: e.total,
loaded: e.loaded,
});
}
});
if(options["wasm_path"])
{
v86_bin = options["wasm_path"];
const slash = v86_bin.lastIndexOf("/");
const dir = slash === -1 ? "" : v86_bin.substr(0, slash);
v86_bin_fallback = dir + "/" + v86_bin_fallback;
}
else if(typeof window === "undefined" && typeof __dirname === "string")
{
v86_bin = __dirname + "/" + v86_bin;
v86_bin_fallback = __dirname + "/" + v86_bin_fallback;
}
else
{
v86_bin = "build/" + v86_bin;
v86_bin_fallback = "build/" + v86_bin_fallback;
}
v86util.load_file(v86_bin, {
done: async bytes =>
{
try
{
const { instance } = await WebAssembly.instantiate(bytes, env);
resolve(instance.exports);
}
catch(err)
{
v86util.load_file(v86_bin_fallback, {
done: async bytes => {
const { instance } = await WebAssembly.instantiate(bytes, env);
resolve(instance.exports);
},
});
}
},
progress: e =>
{
this.emulator_bus.send("download-progress", {
file_index: 0,
file_count: 1,
file_name: v86_bin,
lengthComputable: e.lengthComputable,
total: e.total,
loaded: e.loaded,
});
}
});
}
});
};
}