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/*
* noVNC: HTML5 VNC client
* Copyright (C) 2020 The noVNC Authors
* Licensed under MPL 2.0 (see LICENSE.txt)
*
* See README.md for usage and integration instructions.
*/
import { inflateInit, inflate, inflateReset } from "../vendor/pako/lib/zlib/inflate.js";
import ZStream from "../vendor/pako/lib/zlib/zstream.js";
export default class Inflate {
constructor() {
this.strm = new ZStream();
this.chunkSize = 1024 * 10 * 10;
this.strm.output = new Uint8Array(this.chunkSize);
this.windowBits = 5;
inflateInit(this.strm, this.windowBits);
}
inflate(data, expected) {
this.strm.input = data;
this.strm.avail_in = this.strm.input.length;
this.strm.next_in = 0;
this.strm.next_out = 0;
// resize our output buffer if it's too small
// (we could just use multiple chunks, but that would cause an extra
// allocation each time to flatten the chunks)
if (expected > this.chunkSize) {
this.chunkSize = expected;
this.strm.output = new Uint8Array(this.chunkSize);
}
this.strm.avail_out = this.chunkSize;
let ret = inflate(this.strm, 0); // Flush argument not used.
if (ret < 0) {
throw new Error("zlib inflate failed");
}
if (this.strm.next_out != expected) {
throw new Error("Incomplete zlib block");
}
return new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
}
reset() {
inflateReset(this.strm);
}
}
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