Add RealVNC's JPEG encoding
Add support for RealVNC's JPEG encoding. Add tests for JPEGDecoder. Fix the corner case of caching Huffman or quantization tables.
This commit is contained in:
pdlan
parent
bfb6ac259d
commit
7f84160147
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@ -0,0 +1,141 @@
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/*
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* noVNC: HTML5 VNC client
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* Copyright (C) 2019 The noVNC Authors
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* Licensed under MPL 2.0 (see LICENSE.txt)
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*
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* See README.md for usage and integration instructions.
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*
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*/
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export default class JPEGDecoder {
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constructor() {
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// RealVNC will reuse the quantization tables
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// and Huffman tables, so we need to cache them.
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this._quantTables = [];
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this._huffmanTables = [];
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this._cachedQuantTables = [];
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this._cachedHuffmanTables = [];
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this._jpegLength = 0;
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this._segments = [];
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}
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decodeRect(x, y, width, height, sock, display, depth) {
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// A rect of JPEG encodings is simply a JPEG file
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if (!this._parseJPEG(sock.rQslice(0))) {
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return false;
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}
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const data = sock.rQshiftBytes(this._jpegLength);
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if (this._quantTables.length != 0 && this._huffmanTables.length != 0) {
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// If there are quantization tables and Huffman tables in the JPEG
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// image, we can directly render it.
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display.imageRect(x, y, width, height, "image/jpeg", data);
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return true;
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} else {
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// Otherwise we need to insert cached tables.
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const sofIndex = this._segments.findIndex(
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x => x[1] == 0xC0 || x[1] == 0xC2
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);
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if (sofIndex == -1) {
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throw new Error("Illegal JPEG image without SOF");
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}
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let segments = this._segments.slice(0, sofIndex);
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segments = segments.concat(this._quantTables.length ?
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this._quantTables :
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this._cachedQuantTables);
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segments.push(this._segments[sofIndex]);
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segments = segments.concat(this._huffmanTables.length ?
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this._huffmanTables :
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this._cachedHuffmanTables,
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this._segments.slice(sofIndex + 1));
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let length = 0;
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for (let i = 0; i < segments.length; i++) {
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length += segments[i].length;
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}
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const data = new Uint8Array(length);
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length = 0;
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for (let i = 0; i < segments.length; i++) {
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data.set(segments[i], length);
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length += segments[i].length;
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}
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display.imageRect(x, y, width, height, "image/jpeg", data);
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return true;
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}
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}
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_parseJPEG(buffer) {
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if (this._quantTables.length != 0) {
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this._cachedQuantTables = this._quantTables;
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}
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if (this._huffmanTables.length != 0) {
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this._cachedHuffmanTables = this._huffmanTables;
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}
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this._quantTables = [];
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this._huffmanTables = [];
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this._segments = [];
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let i = 0;
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let bufferLength = buffer.length;
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while (true) {
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let j = i;
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if (j + 2 > bufferLength) {
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return false;
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}
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if (buffer[j] != 0xFF) {
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throw new Error("Illegal JPEG marker received (byte: " +
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buffer[j] + ")");
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}
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const type = buffer[j+1];
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j += 2;
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if (type == 0xD9) {
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this._jpegLength = j;
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this._segments.push(buffer.slice(i, j));
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return true;
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} else if (type == 0xDA) {
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// start of scan
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let hasFoundEndOfScan = false;
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for (let k = j + 3; k + 1 < bufferLength; k++) {
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if (buffer[k] == 0xFF && buffer[k+1] != 0x00 &&
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!(buffer[k+1] >= 0xD0 && buffer[k+1] <= 0xD7)) {
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j = k;
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hasFoundEndOfScan = true;
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break;
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}
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}
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if (!hasFoundEndOfScan) {
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return false;
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}
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this._segments.push(buffer.slice(i, j));
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i = j;
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continue;
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} else if (type >= 0xD0 && type < 0xD9 || type == 0x01) {
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// No length after marker
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this._segments.push(buffer.slice(i, j));
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i = j;
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continue;
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}
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if (j + 2 > bufferLength) {
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return false;
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}
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const length = (buffer[j] << 8) + buffer[j+1] - 2;
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if (length < 0) {
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throw new Error("Illegal JPEG length received (length: " +
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length + ")");
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}
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j += 2;
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if (j + length > bufferLength) {
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return false;
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}
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j += length;
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const segment = buffer.slice(i, j);
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if (type == 0xC4) {
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// Huffman tables
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this._huffmanTables.push(segment);
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} else if (type == 0xDB) {
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// Quantization tables
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this._quantTables.push(segment);
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}
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this._segments.push(segment);
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i = j;
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}
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}
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}
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@ -13,6 +13,7 @@ export const encodings = {
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encodingHextile: 5,
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encodingTight: 7,
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encodingTightPNG: -260,
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encodingJPEG: 21,
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pseudoEncodingQualityLevel9: -23,
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pseudoEncodingQualityLevel0: -32,
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@ -39,6 +40,7 @@ export function encodingName(num) {
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case encodings.encodingHextile: return "Hextile";
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case encodings.encodingTight: return "Tight";
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case encodings.encodingTightPNG: return "TightPNG";
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case encodings.encodingJPEG: return "JPEG";
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default: return "[unknown encoding " + num + "]";
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}
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}
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@ -33,6 +33,7 @@ import HextileDecoder from "./decoders/hextile.js";
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import TightDecoder from "./decoders/tight.js";
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import TightPNGDecoder from "./decoders/tightpng.js";
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import ZRLEDecoder from "./decoders/zrle.js";
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import JPEGDecoder from "./decoders/jpeg.js";
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// How many seconds to wait for a disconnect to finish
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const DISCONNECT_TIMEOUT = 3;
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@ -220,6 +221,7 @@ export default class RFB extends EventTargetMixin {
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this._decoders[encodings.encodingTight] = new TightDecoder();
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this._decoders[encodings.encodingTightPNG] = new TightPNGDecoder();
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this._decoders[encodings.encodingZRLE] = new ZRLEDecoder();
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this._decoders[encodings.encodingJPEG] = new JPEGDecoder();
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// NB: nothing that needs explicit teardown should be done
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// before this point, since this can throw an exception
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@ -1775,6 +1777,7 @@ export default class RFB extends EventTargetMixin {
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encs.push(encodings.encodingTight);
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encs.push(encodings.encodingTightPNG);
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encs.push(encodings.encodingZRLE);
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encs.push(encodings.encodingJPEG);
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encs.push(encodings.encodingHextile);
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encs.push(encodings.encodingRRE);
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}
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@ -0,0 +1,288 @@
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const expect = chai.expect;
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import Websock from '../core/websock.js';
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import Display from '../core/display.js';
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import JPEGDecoder from '../core/decoders/jpeg.js';
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import FakeWebSocket from './fake.websocket.js';
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function testDecodeRect(decoder, x, y, width, height, data, display, depth) {
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let sock;
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sock = new Websock;
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sock.open("ws://example.com");
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sock.on('message', () => {
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decoder.decodeRect(x, y, width, height, sock, display, depth);
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});
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// Empty messages are filtered at multiple layers, so we need to
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// do a direct call
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if (data.length === 0) {
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decoder.decodeRect(x, y, width, height, sock, display, depth);
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} else {
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sock._websocket._receiveData(new Uint8Array(data));
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}
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display.flip();
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}
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describe('JPEG Decoder', function () {
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let decoder;
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let display;
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before(FakeWebSocket.replace);
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after(FakeWebSocket.restore);
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beforeEach(function () {
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decoder = new JPEGDecoder();
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display = new Display(document.createElement('canvas'));
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display.resize(4, 4);
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});
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it('should handle JPEG rects', function (done) {
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let data = [
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// JPEG data
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0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46,
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0x49, 0x46, 0x00, 0x01, 0x01, 0x01, 0x01, 0x2c,
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0x01, 0x2c, 0x00, 0x42, 0xff, 0xdb, 0x00, 0x43,
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0x00, 0x03, 0x02, 0x02, 0x03, 0x02, 0x02, 0x03,
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0x03, 0x03, 0x03, 0x04, 0x03, 0x03, 0x04, 0x05,
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0x08, 0x05, 0x05, 0x04, 0x04, 0x05, 0x0a, 0x07,
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0x07, 0x06, 0x08, 0x0c, 0x0a, 0x0c, 0x0c, 0x0b,
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0x0a, 0x0b, 0x0b, 0x0d, 0x0e, 0x12, 0x10, 0x0d,
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0x0e, 0x11, 0x0e, 0x0b, 0x0b, 0x10, 0x16, 0x10,
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0x11, 0x13, 0x14, 0x15, 0x15, 0x15, 0x0c, 0x0f,
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0x17, 0x18, 0x16, 0x14, 0x18, 0x12, 0x14, 0x15,
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0x14, 0xff, 0xdb, 0x00, 0x43, 0x01, 0x03, 0x04,
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0x04, 0x05, 0x04, 0x05, 0x09, 0x05, 0x05, 0x09,
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0x14, 0x0d, 0x0b, 0x0d, 0x14, 0x14, 0x14, 0x14,
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0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
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0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
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0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
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0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
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0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
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0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0xff, 0xc0,
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0x00, 0x11, 0x08, 0x00, 0x04, 0x00, 0x04, 0x03,
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0x01, 0x11, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11,
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0x01, 0xff, 0xc4, 0x00, 0x1f, 0x00, 0x00, 0x01,
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0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
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0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
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0x0a, 0x0b, 0xff, 0xc4, 0x00, 0xb5, 0x10, 0x00,
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0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05,
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0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7d, 0x01,
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0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21,
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0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22,
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0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23,
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0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24,
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0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17,
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0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 0x29,
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0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a,
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0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
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0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a,
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0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a,
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0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a,
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0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a,
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0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
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0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
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0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
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0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6,
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0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5,
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0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3,
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0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1,
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0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
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0xfa, 0xff, 0xc4, 0x00, 0x1f, 0x01, 0x00, 0x03,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
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0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
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0x0a, 0x0b, 0xff, 0xc4, 0x00, 0xb5, 0x11, 0x00,
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0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07,
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0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00,
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0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31,
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0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13,
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0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1,
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0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15,
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0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1,
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0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27,
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0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39,
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0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
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0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
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0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
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0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
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0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
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0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
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0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6,
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0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5,
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0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4,
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0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3,
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0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2,
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0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
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0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
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0xfa, 0xff, 0xda, 0x00, 0x0c, 0x03, 0x01, 0x00,
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0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00, 0xf9,
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0xf7, 0xfb, 0x67, 0x56, 0xff, 0x00, 0x9f, 0xf8,
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0x3f, 0xf0, 0x51, 0xa7, 0xff, 0x00, 0xf2, 0x3d,
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0x7e, 0x6f, 0xfd, 0xab, 0x94, 0x7f, 0xd0, 0x9a,
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0x8f, 0xfe, 0x0d, 0xc7, 0x7f, 0xf3, 0x61, 0xfd,
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0xa7, 0xff, 0x00, 0x10, 0x77, 0x0d, 0xff, 0x00,
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0x43, 0xec, 0xcf, 0xff, 0x00, 0x0b, 0xab, 0x1f,
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0xff, 0xd9,
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];
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testDecodeRect(decoder, 0, 0, 4, 4, data, display, 24);
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let targetData = new Uint8Array([
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0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255,
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0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255,
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0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255,
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0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255
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]);
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// Browsers have rounding errors, so we need an approximate
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// comparing function
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function almost(a, b) {
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let diff = Math.abs(a - b);
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return diff < 5;
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}
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display.onflush = () => {
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expect(display).to.have.displayed(targetData, almost);
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done();
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};
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display.flush();
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});
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it('should handle JPEG rects without Huffman and quantification tables', function (done) {
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let data1 = [
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// JPEG data
|
||||
0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46,
|
||||
0x49, 0x46, 0x00, 0x01, 0x01, 0x01, 0x01, 0x2c,
|
||||
0x01, 0x2c, 0x00, 0x42, 0xff, 0xdb, 0x00, 0x43,
|
||||
0x00, 0x03, 0x02, 0x02, 0x03, 0x02, 0x02, 0x03,
|
||||
0x03, 0x03, 0x03, 0x04, 0x03, 0x03, 0x04, 0x05,
|
||||
0x08, 0x05, 0x05, 0x04, 0x04, 0x05, 0x0a, 0x07,
|
||||
0x07, 0x06, 0x08, 0x0c, 0x0a, 0x0c, 0x0c, 0x0b,
|
||||
0x0a, 0x0b, 0x0b, 0x0d, 0x0e, 0x12, 0x10, 0x0d,
|
||||
0x0e, 0x11, 0x0e, 0x0b, 0x0b, 0x10, 0x16, 0x10,
|
||||
0x11, 0x13, 0x14, 0x15, 0x15, 0x15, 0x0c, 0x0f,
|
||||
0x17, 0x18, 0x16, 0x14, 0x18, 0x12, 0x14, 0x15,
|
||||
0x14, 0xff, 0xdb, 0x00, 0x43, 0x01, 0x03, 0x04,
|
||||
0x04, 0x05, 0x04, 0x05, 0x09, 0x05, 0x05, 0x09,
|
||||
0x14, 0x0d, 0x0b, 0x0d, 0x14, 0x14, 0x14, 0x14,
|
||||
0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
|
||||
0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
|
||||
0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
|
||||
0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
|
||||
0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
|
||||
0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0xff, 0xc0,
|
||||
0x00, 0x11, 0x08, 0x00, 0x04, 0x00, 0x04, 0x03,
|
||||
0x01, 0x11, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11,
|
||||
0x01, 0xff, 0xc4, 0x00, 0x1f, 0x00, 0x00, 0x01,
|
||||
0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
|
||||
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
|
||||
0x0a, 0x0b, 0xff, 0xc4, 0x00, 0xb5, 0x10, 0x00,
|
||||
0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05,
|
||||
0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7d, 0x01,
|
||||
0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21,
|
||||
0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22,
|
||||
0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23,
|
||||
0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24,
|
||||
0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17,
|
||||
0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 0x29,
|
||||
0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a,
|
||||
0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
|
||||
0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a,
|
||||
0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a,
|
||||
0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a,
|
||||
0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a,
|
||||
0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
|
||||
0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
|
||||
0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
|
||||
0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6,
|
||||
0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5,
|
||||
0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3,
|
||||
0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1,
|
||||
0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
|
||||
0xfa, 0xff, 0xc4, 0x00, 0x1f, 0x01, 0x00, 0x03,
|
||||
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
|
||||
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
|
||||
0x0a, 0x0b, 0xff, 0xc4, 0x00, 0xb5, 0x11, 0x00,
|
||||
0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07,
|
||||
0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00,
|
||||
0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31,
|
||||
0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13,
|
||||
0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1,
|
||||
0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15,
|
||||
0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1,
|
||||
0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27,
|
||||
0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39,
|
||||
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
|
||||
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
|
||||
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
|
||||
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
|
||||
0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
|
||||
0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
|
||||
0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6,
|
||||
0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5,
|
||||
0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4,
|
||||
0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3,
|
||||
0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2,
|
||||
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
|
||||
0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
|
||||
0xfa, 0xff, 0xda, 0x00, 0x0c, 0x03, 0x01, 0x00,
|
||||
0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00, 0xf9,
|
||||
0xf7, 0xfb, 0x67, 0x56, 0xff, 0x00, 0x9f, 0xf8,
|
||||
0x3f, 0xf0, 0x51, 0xa7, 0xff, 0x00, 0xf2, 0x3d,
|
||||
0x7e, 0x6f, 0xfd, 0xab, 0x94, 0x7f, 0xd0, 0x9a,
|
||||
0x8f, 0xfe, 0x0d, 0xc7, 0x7f, 0xf3, 0x61, 0xfd,
|
||||
0xa7, 0xff, 0x00, 0x10, 0x77, 0x0d, 0xff, 0x00,
|
||||
0x43, 0xec, 0xcf, 0xff, 0x00, 0x0b, 0xab, 0x1f,
|
||||
0xff, 0xd9,
|
||||
];
|
||||
|
||||
testDecodeRect(decoder, 0, 0, 4, 4, data1, display, 24);
|
||||
|
||||
let data2 = [
|
||||
// JPEG data
|
||||
0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46,
|
||||
0x49, 0x46, 0x00, 0x01, 0x01, 0x01, 0x01, 0x2c,
|
||||
0x01, 0x2c, 0x00, 0x73, 0xff, 0xc0, 0x00, 0x11,
|
||||
0x08, 0x00, 0x04, 0x00, 0x04, 0x03, 0x01, 0x11,
|
||||
0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01, 0xff,
|
||||
0xda, 0x00, 0x0c, 0x03, 0x01, 0x00, 0x02, 0x11,
|
||||
0x03, 0x11, 0x00, 0x3f, 0x00, 0xf9, 0xf7, 0xfb,
|
||||
0x67, 0x56, 0xff, 0x00, 0x9f, 0xf8, 0x3f, 0xf0,
|
||||
0x51, 0xa7, 0xff, 0x00, 0xf2, 0x3d, 0x7e, 0x6f,
|
||||
0xfd, 0xab, 0x94, 0x7f, 0xd0, 0x9a, 0x8f, 0xfe,
|
||||
0x0d, 0xc7, 0x7f, 0xf3, 0x61, 0xfd, 0xa7, 0xff,
|
||||
0x00, 0x10, 0x77, 0x0d, 0xff, 0x00, 0x43, 0xec,
|
||||
0xcf, 0xff, 0x00, 0x0b, 0xab, 0x1f, 0xff, 0xd9,
|
||||
];
|
||||
|
||||
testDecodeRect(decoder, 0, 0, 4, 4, data2, display, 24);
|
||||
|
||||
let targetData = new Uint8Array([
|
||||
0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255,
|
||||
0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255,
|
||||
0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255,
|
||||
0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255
|
||||
]);
|
||||
|
||||
// Browsers have rounding errors, so we need an approximate
|
||||
// comparing function
|
||||
function almost(a, b) {
|
||||
let diff = Math.abs(a - b);
|
||||
return diff < 5;
|
||||
}
|
||||
|
||||
display.onflush = () => {
|
||||
expect(display).to.have.displayed(targetData, almost);
|
||||
done();
|
||||
};
|
||||
display.flush();
|
||||
});
|
||||
});
|
||||
Loading…
Reference in New Issue