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27
static/core/decoders/copyrect.js
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27
static/core/decoders/copyrect.js
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@@ -0,0 +1,27 @@
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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 CopyRectDecoder {
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decodeRect(x, y, width, height, sock, display, depth) {
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if (sock.rQwait("COPYRECT", 4)) {
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return false;
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}
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let deltaX = sock.rQshift16();
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let deltaY = sock.rQshift16();
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if ((width === 0) || (height === 0)) {
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return true;
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}
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display.copyImage(deltaX, deltaY, x, y, width, height);
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return true;
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}
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}
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191
static/core/decoders/hextile.js
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191
static/core/decoders/hextile.js
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@@ -0,0 +1,191 @@
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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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import * as Log from '../util/logging.js';
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export default class HextileDecoder {
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constructor() {
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this._tiles = 0;
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this._lastsubencoding = 0;
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this._tileBuffer = new Uint8Array(16 * 16 * 4);
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}
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decodeRect(x, y, width, height, sock, display, depth) {
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if (this._tiles === 0) {
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this._tilesX = Math.ceil(width / 16);
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this._tilesY = Math.ceil(height / 16);
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this._totalTiles = this._tilesX * this._tilesY;
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this._tiles = this._totalTiles;
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}
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while (this._tiles > 0) {
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let bytes = 1;
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if (sock.rQwait("HEXTILE", bytes)) {
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return false;
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}
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let rQ = sock.rQ;
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let rQi = sock.rQi;
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let subencoding = rQ[rQi]; // Peek
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if (subencoding > 30) { // Raw
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throw new Error("Illegal hextile subencoding (subencoding: " +
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subencoding + ")");
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}
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const currTile = this._totalTiles - this._tiles;
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const tileX = currTile % this._tilesX;
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const tileY = Math.floor(currTile / this._tilesX);
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const tx = x + tileX * 16;
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const ty = y + tileY * 16;
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const tw = Math.min(16, (x + width) - tx);
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const th = Math.min(16, (y + height) - ty);
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// Figure out how much we are expecting
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if (subencoding & 0x01) { // Raw
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bytes += tw * th * 4;
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} else {
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if (subencoding & 0x02) { // Background
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bytes += 4;
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}
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if (subencoding & 0x04) { // Foreground
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bytes += 4;
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}
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if (subencoding & 0x08) { // AnySubrects
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bytes++; // Since we aren't shifting it off
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if (sock.rQwait("HEXTILE", bytes)) {
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return false;
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}
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let subrects = rQ[rQi + bytes - 1]; // Peek
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if (subencoding & 0x10) { // SubrectsColoured
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bytes += subrects * (4 + 2);
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} else {
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bytes += subrects * 2;
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}
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}
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}
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if (sock.rQwait("HEXTILE", bytes)) {
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return false;
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}
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// We know the encoding and have a whole tile
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rQi++;
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if (subencoding === 0) {
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if (this._lastsubencoding & 0x01) {
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// Weird: ignore blanks are RAW
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Log.Debug(" Ignoring blank after RAW");
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} else {
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display.fillRect(tx, ty, tw, th, this._background);
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}
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} else if (subencoding & 0x01) { // Raw
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let pixels = tw * th;
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// Max sure the image is fully opaque
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for (let i = 0;i < pixels;i++) {
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rQ[rQi + i * 4 + 3] = 255;
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}
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display.blitImage(tx, ty, tw, th, rQ, rQi);
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rQi += bytes - 1;
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} else {
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if (subencoding & 0x02) { // Background
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this._background = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]];
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rQi += 4;
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}
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if (subencoding & 0x04) { // Foreground
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this._foreground = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]];
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rQi += 4;
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}
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this._startTile(tx, ty, tw, th, this._background);
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if (subencoding & 0x08) { // AnySubrects
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let subrects = rQ[rQi];
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rQi++;
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for (let s = 0; s < subrects; s++) {
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let color;
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if (subencoding & 0x10) { // SubrectsColoured
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color = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]];
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rQi += 4;
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} else {
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color = this._foreground;
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}
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const xy = rQ[rQi];
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rQi++;
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const sx = (xy >> 4);
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const sy = (xy & 0x0f);
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const wh = rQ[rQi];
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rQi++;
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const sw = (wh >> 4) + 1;
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const sh = (wh & 0x0f) + 1;
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this._subTile(sx, sy, sw, sh, color);
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}
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}
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this._finishTile(display);
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}
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sock.rQi = rQi;
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this._lastsubencoding = subencoding;
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this._tiles--;
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}
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return true;
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}
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// start updating a tile
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_startTile(x, y, width, height, color) {
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this._tileX = x;
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this._tileY = y;
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this._tileW = width;
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this._tileH = height;
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const red = color[0];
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const green = color[1];
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const blue = color[2];
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const data = this._tileBuffer;
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for (let i = 0; i < width * height * 4; i += 4) {
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data[i] = red;
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data[i + 1] = green;
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data[i + 2] = blue;
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data[i + 3] = 255;
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}
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}
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// update sub-rectangle of the current tile
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_subTile(x, y, w, h, color) {
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const red = color[0];
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const green = color[1];
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const blue = color[2];
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const xend = x + w;
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const yend = y + h;
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const data = this._tileBuffer;
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const width = this._tileW;
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for (let j = y; j < yend; j++) {
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for (let i = x; i < xend; i++) {
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const p = (i + (j * width)) * 4;
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data[p] = red;
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data[p + 1] = green;
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data[p + 2] = blue;
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data[p + 3] = 255;
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}
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}
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}
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// draw the current tile to the screen
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_finishTile(display) {
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display.blitImage(this._tileX, this._tileY,
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this._tileW, this._tileH,
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this._tileBuffer, 0);
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}
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}
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66
static/core/decoders/raw.js
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66
static/core/decoders/raw.js
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@@ -0,0 +1,66 @@
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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 RawDecoder {
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constructor() {
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this._lines = 0;
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}
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decodeRect(x, y, width, height, sock, display, depth) {
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if ((width === 0) || (height === 0)) {
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return true;
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}
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if (this._lines === 0) {
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this._lines = height;
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}
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const pixelSize = depth == 8 ? 1 : 4;
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const bytesPerLine = width * pixelSize;
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if (sock.rQwait("RAW", bytesPerLine)) {
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return false;
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}
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const curY = y + (height - this._lines);
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const currHeight = Math.min(this._lines,
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Math.floor(sock.rQlen / bytesPerLine));
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const pixels = width * currHeight;
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let data = sock.rQ;
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let index = sock.rQi;
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// Convert data if needed
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if (depth == 8) {
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const newdata = new Uint8Array(pixels * 4);
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for (let i = 0; i < pixels; i++) {
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newdata[i * 4 + 0] = ((data[index + i] >> 0) & 0x3) * 255 / 3;
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newdata[i * 4 + 1] = ((data[index + i] >> 2) & 0x3) * 255 / 3;
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newdata[i * 4 + 2] = ((data[index + i] >> 4) & 0x3) * 255 / 3;
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newdata[i * 4 + 3] = 255;
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}
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data = newdata;
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index = 0;
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}
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// Max sure the image is fully opaque
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for (let i = 0; i < pixels; i++) {
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data[i * 4 + 3] = 255;
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}
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display.blitImage(x, curY, width, currHeight, data, index);
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sock.rQskipBytes(currHeight * bytesPerLine);
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this._lines -= currHeight;
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if (this._lines > 0) {
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return false;
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}
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return true;
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}
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}
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44
static/core/decoders/rre.js
Normal file
44
static/core/decoders/rre.js
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@@ -0,0 +1,44 @@
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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 RREDecoder {
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constructor() {
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this._subrects = 0;
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}
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decodeRect(x, y, width, height, sock, display, depth) {
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if (this._subrects === 0) {
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if (sock.rQwait("RRE", 4 + 4)) {
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return false;
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}
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this._subrects = sock.rQshift32();
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let color = sock.rQshiftBytes(4); // Background
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display.fillRect(x, y, width, height, color);
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}
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while (this._subrects > 0) {
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if (sock.rQwait("RRE", 4 + 8)) {
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return false;
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}
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let color = sock.rQshiftBytes(4);
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let sx = sock.rQshift16();
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let sy = sock.rQshift16();
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let swidth = sock.rQshift16();
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let sheight = sock.rQshift16();
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display.fillRect(x + sx, y + sy, swidth, sheight, color);
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this._subrects--;
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}
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return true;
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}
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}
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331
static/core/decoders/tight.js
Normal file
331
static/core/decoders/tight.js
Normal file
@@ -0,0 +1,331 @@
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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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* (c) 2012 Michael Tinglof, Joe Balaz, Les Piech (Mercuri.ca)
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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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import * as Log from '../util/logging.js';
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import Inflator from "../inflator.js";
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export default class TightDecoder {
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constructor() {
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this._ctl = null;
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this._filter = null;
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this._numColors = 0;
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this._palette = new Uint8Array(1024); // 256 * 4 (max palette size * max bytes-per-pixel)
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this._len = 0;
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this._zlibs = [];
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for (let i = 0; i < 4; i++) {
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this._zlibs[i] = new Inflator();
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}
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}
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decodeRect(x, y, width, height, sock, display, depth) {
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if (this._ctl === null) {
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if (sock.rQwait("TIGHT compression-control", 1)) {
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return false;
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}
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this._ctl = sock.rQshift8();
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// Reset streams if the server requests it
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for (let i = 0; i < 4; i++) {
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if ((this._ctl >> i) & 1) {
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this._zlibs[i].reset();
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Log.Info("Reset zlib stream " + i);
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}
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}
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// Figure out filter
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this._ctl = this._ctl >> 4;
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}
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let ret;
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if (this._ctl === 0x08) {
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ret = this._fillRect(x, y, width, height,
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sock, display, depth);
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} else if (this._ctl === 0x09) {
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ret = this._jpegRect(x, y, width, height,
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sock, display, depth);
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} else if (this._ctl === 0x0A) {
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ret = this._pngRect(x, y, width, height,
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sock, display, depth);
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} else if ((this._ctl & 0x08) == 0) {
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ret = this._basicRect(this._ctl, x, y, width, height,
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sock, display, depth);
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} else {
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throw new Error("Illegal tight compression received (ctl: " +
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this._ctl + ")");
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}
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if (ret) {
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this._ctl = null;
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}
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return ret;
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}
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_fillRect(x, y, width, height, sock, display, depth) {
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if (sock.rQwait("TIGHT", 3)) {
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return false;
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}
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const rQi = sock.rQi;
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const rQ = sock.rQ;
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display.fillRect(x, y, width, height,
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[rQ[rQi], rQ[rQi + 1], rQ[rQi + 2]], false);
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sock.rQskipBytes(3);
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return true;
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}
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_jpegRect(x, y, width, height, sock, display, depth) {
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let data = this._readData(sock);
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if (data === null) {
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return false;
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}
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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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_pngRect(x, y, width, height, sock, display, depth) {
|
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throw new Error("PNG received in standard Tight rect");
|
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}
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|
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_basicRect(ctl, x, y, width, height, sock, display, depth) {
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if (this._filter === null) {
|
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if (ctl & 0x4) {
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if (sock.rQwait("TIGHT", 1)) {
|
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return false;
|
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}
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|
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this._filter = sock.rQshift8();
|
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} else {
|
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// Implicit CopyFilter
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this._filter = 0;
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}
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}
|
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let streamId = ctl & 0x3;
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let ret;
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switch (this._filter) {
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case 0: // CopyFilter
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ret = this._copyFilter(streamId, x, y, width, height,
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sock, display, depth);
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break;
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case 1: // PaletteFilter
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ret = this._paletteFilter(streamId, x, y, width, height,
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sock, display, depth);
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break;
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case 2: // GradientFilter
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ret = this._gradientFilter(streamId, x, y, width, height,
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sock, display, depth);
|
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break;
|
||||
default:
|
||||
throw new Error("Illegal tight filter received (ctl: " +
|
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this._filter + ")");
|
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}
|
||||
|
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if (ret) {
|
||||
this._filter = null;
|
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}
|
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|
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return ret;
|
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}
|
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|
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_copyFilter(streamId, x, y, width, height, sock, display, depth) {
|
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const uncompressedSize = width * height * 3;
|
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let data;
|
||||
|
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if (uncompressedSize === 0) {
|
||||
return true;
|
||||
}
|
||||
|
||||
if (uncompressedSize < 12) {
|
||||
if (sock.rQwait("TIGHT", uncompressedSize)) {
|
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return false;
|
||||
}
|
||||
|
||||
data = sock.rQshiftBytes(uncompressedSize);
|
||||
} else {
|
||||
data = this._readData(sock);
|
||||
if (data === null) {
|
||||
return false;
|
||||
}
|
||||
|
||||
this._zlibs[streamId].setInput(data);
|
||||
data = this._zlibs[streamId].inflate(uncompressedSize);
|
||||
this._zlibs[streamId].setInput(null);
|
||||
}
|
||||
|
||||
let rgbx = new Uint8Array(width * height * 4);
|
||||
for (let i = 0, j = 0; i < width * height * 4; i += 4, j += 3) {
|
||||
rgbx[i] = data[j];
|
||||
rgbx[i + 1] = data[j + 1];
|
||||
rgbx[i + 2] = data[j + 2];
|
||||
rgbx[i + 3] = 255; // Alpha
|
||||
}
|
||||
|
||||
display.blitImage(x, y, width, height, rgbx, 0, false);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
_paletteFilter(streamId, x, y, width, height, sock, display, depth) {
|
||||
if (this._numColors === 0) {
|
||||
if (sock.rQwait("TIGHT palette", 1)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const numColors = sock.rQpeek8() + 1;
|
||||
const paletteSize = numColors * 3;
|
||||
|
||||
if (sock.rQwait("TIGHT palette", 1 + paletteSize)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
this._numColors = numColors;
|
||||
sock.rQskipBytes(1);
|
||||
|
||||
sock.rQshiftTo(this._palette, paletteSize);
|
||||
}
|
||||
|
||||
const bpp = (this._numColors <= 2) ? 1 : 8;
|
||||
const rowSize = Math.floor((width * bpp + 7) / 8);
|
||||
const uncompressedSize = rowSize * height;
|
||||
|
||||
let data;
|
||||
|
||||
if (uncompressedSize === 0) {
|
||||
return true;
|
||||
}
|
||||
|
||||
if (uncompressedSize < 12) {
|
||||
if (sock.rQwait("TIGHT", uncompressedSize)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
data = sock.rQshiftBytes(uncompressedSize);
|
||||
} else {
|
||||
data = this._readData(sock);
|
||||
if (data === null) {
|
||||
return false;
|
||||
}
|
||||
|
||||
this._zlibs[streamId].setInput(data);
|
||||
data = this._zlibs[streamId].inflate(uncompressedSize);
|
||||
this._zlibs[streamId].setInput(null);
|
||||
}
|
||||
|
||||
// Convert indexed (palette based) image data to RGB
|
||||
if (this._numColors == 2) {
|
||||
this._monoRect(x, y, width, height, data, this._palette, display);
|
||||
} else {
|
||||
this._paletteRect(x, y, width, height, data, this._palette, display);
|
||||
}
|
||||
|
||||
this._numColors = 0;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
_monoRect(x, y, width, height, data, palette, display) {
|
||||
// Convert indexed (palette based) image data to RGB
|
||||
// TODO: reduce number of calculations inside loop
|
||||
const dest = this._getScratchBuffer(width * height * 4);
|
||||
const w = Math.floor((width + 7) / 8);
|
||||
const w1 = Math.floor(width / 8);
|
||||
|
||||
for (let y = 0; y < height; y++) {
|
||||
let dp, sp, x;
|
||||
for (x = 0; x < w1; x++) {
|
||||
for (let b = 7; b >= 0; b--) {
|
||||
dp = (y * width + x * 8 + 7 - b) * 4;
|
||||
sp = (data[y * w + x] >> b & 1) * 3;
|
||||
dest[dp] = palette[sp];
|
||||
dest[dp + 1] = palette[sp + 1];
|
||||
dest[dp + 2] = palette[sp + 2];
|
||||
dest[dp + 3] = 255;
|
||||
}
|
||||
}
|
||||
|
||||
for (let b = 7; b >= 8 - width % 8; b--) {
|
||||
dp = (y * width + x * 8 + 7 - b) * 4;
|
||||
sp = (data[y * w + x] >> b & 1) * 3;
|
||||
dest[dp] = palette[sp];
|
||||
dest[dp + 1] = palette[sp + 1];
|
||||
dest[dp + 2] = palette[sp + 2];
|
||||
dest[dp + 3] = 255;
|
||||
}
|
||||
}
|
||||
|
||||
display.blitImage(x, y, width, height, dest, 0, false);
|
||||
}
|
||||
|
||||
_paletteRect(x, y, width, height, data, palette, display) {
|
||||
// Convert indexed (palette based) image data to RGB
|
||||
const dest = this._getScratchBuffer(width * height * 4);
|
||||
const total = width * height * 4;
|
||||
for (let i = 0, j = 0; i < total; i += 4, j++) {
|
||||
const sp = data[j] * 3;
|
||||
dest[i] = palette[sp];
|
||||
dest[i + 1] = palette[sp + 1];
|
||||
dest[i + 2] = palette[sp + 2];
|
||||
dest[i + 3] = 255;
|
||||
}
|
||||
|
||||
display.blitImage(x, y, width, height, dest, 0, false);
|
||||
}
|
||||
|
||||
_gradientFilter(streamId, x, y, width, height, sock, display, depth) {
|
||||
throw new Error("Gradient filter not implemented");
|
||||
}
|
||||
|
||||
_readData(sock) {
|
||||
if (this._len === 0) {
|
||||
if (sock.rQwait("TIGHT", 3)) {
|
||||
return null;
|
||||
}
|
||||
|
||||
let byte;
|
||||
|
||||
byte = sock.rQshift8();
|
||||
this._len = byte & 0x7f;
|
||||
if (byte & 0x80) {
|
||||
byte = sock.rQshift8();
|
||||
this._len |= (byte & 0x7f) << 7;
|
||||
if (byte & 0x80) {
|
||||
byte = sock.rQshift8();
|
||||
this._len |= byte << 14;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (sock.rQwait("TIGHT", this._len)) {
|
||||
return null;
|
||||
}
|
||||
|
||||
let data = sock.rQshiftBytes(this._len);
|
||||
this._len = 0;
|
||||
|
||||
return data;
|
||||
}
|
||||
|
||||
_getScratchBuffer(size) {
|
||||
if (!this._scratchBuffer || (this._scratchBuffer.length < size)) {
|
||||
this._scratchBuffer = new Uint8Array(size);
|
||||
}
|
||||
return this._scratchBuffer;
|
||||
}
|
||||
}
|
||||
27
static/core/decoders/tightpng.js
Normal file
27
static/core/decoders/tightpng.js
Normal file
@@ -0,0 +1,27 @@
|
||||
/*
|
||||
* noVNC: HTML5 VNC client
|
||||
* Copyright (C) 2019 The noVNC Authors
|
||||
* Licensed under MPL 2.0 (see LICENSE.txt)
|
||||
*
|
||||
* See README.md for usage and integration instructions.
|
||||
*
|
||||
*/
|
||||
|
||||
import TightDecoder from './tight.js';
|
||||
|
||||
export default class TightPNGDecoder extends TightDecoder {
|
||||
_pngRect(x, y, width, height, sock, display, depth) {
|
||||
let data = this._readData(sock);
|
||||
if (data === null) {
|
||||
return false;
|
||||
}
|
||||
|
||||
display.imageRect(x, y, width, height, "image/png", data);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
_basicRect(ctl, x, y, width, height, sock, display, depth) {
|
||||
throw new Error("BasicCompression received in TightPNG rect");
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user