Merge commit 'd38db74a'

Conflicts:
	README.md

README.md

@@ -26,6 +26,7 @@ their products including: [Ganeti Web Manager](http://code.osuosl.org/projects/g
 * Easy site integration and theming (3 example themes included)
 * Licensed under the [LGPLv3](http://www.gnu.org/licenses/lgpl.html)
 
+* Support for tight encoding (contributed by Mercuri.ca)
 
 ### Screenshots
 

include/display.js

@@ -20,7 +20,7 @@ var that           = {},  // Public API methods
     c_forceCanvas  = false,
 
     // Predefine function variables (jslint)
-    imageDataGet, bgrxImageData, cmapImageData,
+    imageDataGet, rgbImageData, bgrxImageData, cmapImageData,
     setFillColor, rescale,
 
     // The full frame buffer (logical canvas) size
@@ -497,6 +497,26 @@ that.finishTile = function() {
     // else: No-op, if not prefer_js then already done by setSubTile
 };
 
+rgbImageData = function(x, y, width, height, arr, offset) {
+    var img, i, j, data, v = viewport;
+    /*
+    if ((x - v.x >= v.w) || (y - v.y >= v.h) ||
+        (x - v.x + width < 0) || (y - v.y + height < 0)) {
+        // Skipping because outside of viewport
+        return;
+    }
+    */
+    img = c_ctx.createImageData(width, height);
+    data = img.data;
+    for (i=0, j=offset; i < (width * height * 4); i=i+4, j=j+3) {
+        data[i    ] = arr[j    ];
+        data[i + 1] = arr[j + 1];
+        data[i + 2] = arr[j + 2];
+        data[i + 3] = 255; // Set Alpha
+    }
+    c_ctx.putImageData(img, x - v.x, y - v.y);
+};
+
 bgrxImageData = function(x, y, width, height, arr, offset) {
     var img, i, j, data, v = viewport;
     /*
@@ -540,6 +560,15 @@ that.blitImage = function(x, y, width, height, arr, offset) {
     }
 };
 
+that.blitRgbImage = function(x, y, width, height, arr, offset) {
+    if (conf.true_color) {
+        rgbImageData(x, y, width, height, arr, offset);
+    } else {
+        // prolly wrong...
+        cmapImageData(x, y, width, height, arr, offset);
+    }
+};
+
 that.blitStringImage = function(str, x, y) {
     var img = new Image();
     img.onload = function () {

include/jsunzip.js

+/*
+ * JSUnzip
+ *
+ * Copyright (c) 2011 by Erik Moller
+ * All Rights Reserved
+ *
+ * This software is provided 'as-is', without any express
+ * or implied warranty.  In no event will the authors be
+ * held liable for any damages arising from the use of
+ * this software.
+ *
+ * Permission is granted to anyone to use this software
+ * for any purpose, including commercial applications,
+ * and to alter it and redistribute it freely, subject to
+ * the following restrictions:
+ *
+ * 1. The origin of this software must not be
+ *    misrepresented; you must not claim that you
+ *    wrote the original software. If you use this
+ *    software in a product, an acknowledgment in
+ *    the product documentation would be appreciated
+ *    but is not required.
+ *
+ * 2. Altered source versions must be plainly marked
+ *    as such, and must not be misrepresented as
+ *    being the original software.
+ *
+ * 3. This notice may not be removed or altered from
+ *    any source distribution.
+ */
+ 
+var tinf;
+
+function JSUnzip() {
+
+    this.getInt = function(offset, size) {
+        switch (size) {
+        case 4:
+            return  (this.data.charCodeAt(offset + 3) & 0xff) << 24 | 
+                    (this.data.charCodeAt(offset + 2) & 0xff) << 16 | 
+                    (this.data.charCodeAt(offset + 1) & 0xff) << 8 | 
+                    (this.data.charCodeAt(offset + 0) & 0xff);
+            break;
+        case 2:
+            return  (this.data.charCodeAt(offset + 1) & 0xff) << 8 | 
+                    (this.data.charCodeAt(offset + 0) & 0xff);
+            break;
+        default:
+            return this.data.charCodeAt(offset) & 0xff;
+            break;
+        }
+    };
+
+    this.getDOSDate = function(dosdate, dostime) {
+        var day = dosdate & 0x1f;
+        var month = ((dosdate >> 5) & 0xf) - 1;
+        var year = 1980 + ((dosdate >> 9) & 0x7f)
+        var second = (dostime & 0x1f) * 2;
+        var minute = (dostime >> 5) & 0x3f;
+        hour = (dostime >> 11) & 0x1f;
+        return new Date(year, month, day, hour, minute, second);
+    }
+
+    this.open = function(data) {
+        this.data = data;
+        this.files = [];
+
+        if (this.data.length < 22)
+            return { 'status' : false, 'error' : 'Invalid data' };
+        var endOfCentralDirectory = this.data.length - 22;
+        while (endOfCentralDirectory >= 0 && this.getInt(endOfCentralDirectory, 4) != 0x06054b50)
+            --endOfCentralDirectory;
+        if (endOfCentralDirectory < 0)
+            return { 'status' : false, 'error' : 'Invalid data' };
+        if (this.getInt(endOfCentralDirectory + 4, 2) != 0 || this.getInt(endOfCentralDirectory + 6, 2) != 0)
+            return { 'status' : false, 'error' : 'No multidisk support' };
+
+        var entriesInThisDisk = this.getInt(endOfCentralDirectory + 8, 2);
+        var centralDirectoryOffset = this.getInt(endOfCentralDirectory + 16, 4);
+        var globalCommentLength = this.getInt(endOfCentralDirectory + 20, 2);
+        this.comment = this.data.slice(endOfCentralDirectory + 22, endOfCentralDirectory + 22 + globalCommentLength);
+
+        var fileOffset = centralDirectoryOffset;
+
+        for (var i = 0; i < entriesInThisDisk; ++i) {
+            if (this.getInt(fileOffset + 0, 4) != 0x02014b50)
+                return { 'status' : false, 'error' : 'Invalid data' };
+            if (this.getInt(fileOffset + 6, 2) > 20)
+                return { 'status' : false, 'error' : 'Unsupported version' };
+            if (this.getInt(fileOffset + 8, 2) & 1)
+                return { 'status' : false, 'error' : 'Encryption not implemented' };
+
+            var compressionMethod = this.getInt(fileOffset + 10, 2);
+            if (compressionMethod != 0 && compressionMethod != 8)
+                return { 'status' : false, 'error' : 'Unsupported compression method' };
+
+            var lastModFileTime = this.getInt(fileOffset + 12, 2);
+            var lastModFileDate = this.getInt(fileOffset + 14, 2);
+            var lastModifiedDate = this.getDOSDate(lastModFileDate, lastModFileTime);
+
+            var crc = this.getInt(fileOffset + 16, 4);
+            // TODO: crc
+
+            var compressedSize = this.getInt(fileOffset + 20, 4);
+            var uncompressedSize = this.getInt(fileOffset + 24, 4);
+
+            var fileNameLength = this.getInt(fileOffset + 28, 2);
+            var extraFieldLength = this.getInt(fileOffset + 30, 2);
+            var fileCommentLength = this.getInt(fileOffset + 32, 2);
+
+            var relativeOffsetOfLocalHeader = this.getInt(fileOffset + 42, 4);
+
+            var fileName = this.data.slice(fileOffset + 46, fileOffset + 46 + fileNameLength);
+            var fileComment = this.data.slice(fileOffset + 46 + fileNameLength + extraFieldLength, fileOffset + 46 + fileNameLength + extraFieldLength + fileCommentLength);
+
+            if (this.getInt(relativeOffsetOfLocalHeader + 0, 4) != 0x04034b50)
+                return { 'status' : false, 'error' : 'Invalid data' };
+            var localFileNameLength = this.getInt(relativeOffsetOfLocalHeader + 26, 2);
+            var localExtraFieldLength = this.getInt(relativeOffsetOfLocalHeader + 28, 2);
+            var localFileContent = relativeOffsetOfLocalHeader + 30 + localFileNameLength + localExtraFieldLength;
+
+            this.files[fileName] = 
+            {
+                'fileComment' : fileComment,
+                'compressionMethod' : compressionMethod,
+                'compressedSize' : compressedSize,
+                'uncompressedSize' : uncompressedSize,
+                'localFileContent' : localFileContent,
+                'lastModifiedDate' : lastModifiedDate
+            };
+
+            fileOffset += 46 + fileNameLength + extraFieldLength + fileCommentLength;
+        }
+        return { 'status' : true }
+    };     
+    
+
+    this.read = function(fileName) {
+        var fileInfo = this.files[fileName];
+        if (fileInfo) {
+            if (fileInfo.compressionMethod == 8) {
+                if (!tinf) {
+                    tinf = new TINF();
+                    tinf.init();
+                }
+                var result = tinf.uncompress(this.data, fileInfo.localFileContent);
+                if (result.status == tinf.OK)
+                    return { 'status' : true, 'data' : result.data };
+                else
+                    return { 'status' : false, 'error' : result.error };
+            } else {
+                return { 'status' : true, 'data' : this.data.slice(fileInfo.localFileContent, fileInfo.localFileContent + fileInfo.uncompressedSize) };
+            }
+        }
+        return { 'status' : false, 'error' : "File '" + fileName + "' doesn't exist in zip" };
+    };
+    
+};
+
+
+
+/*
+ * tinflate  -  tiny inflate
+ *
+ * Copyright (c) 2003 by Joergen Ibsen / Jibz
+ * All Rights Reserved
+ *
+ * http://www.ibsensoftware.com/
+ *
+ * This software is provided 'as-is', without any express
+ * or implied warranty.  In no event will the authors be
+ * held liable for any damages arising from the use of
+ * this software.
+ *
+ * Permission is granted to anyone to use this software
+ * for any purpose, including commercial applications,
+ * and to alter it and redistribute it freely, subject to
+ * the following restrictions:
+ *
+ * 1. The origin of this software must not be
+ *    misrepresented; you must not claim that you
+ *    wrote the original software. If you use this
+ *    software in a product, an acknowledgment in
+ *    the product documentation would be appreciated
+ *    but is not required.
+ *
+ * 2. Altered source versions must be plainly marked
+ *    as such, and must not be misrepresented as
+ *    being the original software.
+ *
+ * 3. This notice may not be removed or altered from
+ *    any source distribution.
+ */
+
+/*
+ * tinflate javascript port by Erik Moller in May 2011.
+ * emoller@opera.com
+ * 
+ * read_bits() patched by mike@imidio.com to allow
+ * reading more then 8 bits (needed in some zlib streams)
+ */
+
+"use strict";
+
+function TINF() {
+    
+this.OK = 0;
+this.DATA_ERROR = (-3);
+this.WINDOW_SIZE = 32768;
+
+/* ------------------------------ *
+ * -- internal data structures -- *
+ * ------------------------------ */
+
+this.TREE = function() {
+   this.table = new Array(16);  /* table of code length counts */
+   this.trans = new Array(288); /* code -> symbol translation table */
+};
+
+this.DATA = function(that) {
+   this.source = '';
+   this.sourceIndex = 0;
+   this.tag = 0;
+   this.bitcount = 0;
+
+   this.dest = [];
+   
+   this.history = [];
+
+   this.ltree = new that.TREE(); /* dynamic length/symbol tree */
+   this.dtree = new that.TREE(); /* dynamic distance tree */
+};
+
+/* --------------------------------------------------- *
+ * -- uninitialized global data (static structures) -- *
+ * --------------------------------------------------- */
+
+this.sltree = new this.TREE(); /* fixed length/symbol tree */
+this.sdtree = new this.TREE(); /* fixed distance tree */
+
+/* extra bits and base tables for length codes */
+this.length_bits = new Array(30);
+this.length_base = new Array(30);
+
+/* extra bits and base tables for distance codes */
+this.dist_bits = new Array(30);
+this.dist_base = new Array(30);
+
+/* special ordering of code length codes */
+this.clcidx = [
+   16, 17, 18, 0, 8, 7, 9, 6,
+   10, 5, 11, 4, 12, 3, 13, 2,
+   14, 1, 15
+];
+
+/* ----------------------- *
+ * -- utility functions -- *
+ * ----------------------- */
+
+/* build extra bits and base tables */
+this.build_bits_base = function(bits, base, delta, first)
+{
+   var i, sum;
+
+   /* build bits table */
+   for (i = 0; i < delta; ++i) bits[i] = 0;
+   for (i = 0; i < 30 - delta; ++i) bits[i + delta] = Math.floor(i / delta);
+
+   /* build base table */
+   for (sum = first, i = 0; i < 30; ++i)
+   {
+      base[i] = sum;
+      sum += 1 << bits[i];
+   }
+}
+
+/* build the fixed huffman trees */
+this.build_fixed_trees = function(lt, dt)
+{
+   var i;
+
+   /* build fixed length tree */
+   for (i = 0; i < 7; ++i) lt.table[i] = 0;
+
+   lt.table[7] = 24;
+   lt.table[8] = 152;
+   lt.table[9] = 112;
+
+   for (i = 0; i < 24; ++i) lt.trans[i] = 256 + i;
+   for (i = 0; i < 144; ++i) lt.trans[24 + i] = i;
+   for (i = 0; i < 8; ++i) lt.trans[24 + 144 + i] = 280 + i;
+   for (i = 0; i < 112; ++i) lt.trans[24 + 144 + 8 + i] = 144 + i;
+
+   /* build fixed distance tree */
+   for (i = 0; i < 5; ++i) dt.table[i] = 0;
+
+   dt.table[5] = 32;
+
+   for (i = 0; i < 32; ++i) dt.trans[i] = i;
+}
+
+/* given an array of code lengths, build a tree */
+this.build_tree = function(t, lengths, loffset, num)
+{
+   var offs = new Array(16);
+   var i, sum;
+
+   /* clear code length count table */
+   for (i = 0; i < 16; ++i) t.table[i] = 0;
+
+   /* scan symbol lengths, and sum code length counts */
+   for (i = 0; i < num; ++i) t.table[lengths[loffset + i]]++;
+
+   t.table[0] = 0;
+
+   /* compute offset table for distribution sort */
+   for (sum = 0, i = 0; i < 16; ++i)
+   {
+      offs[i] = sum;
+      sum += t.table[i];
+   }
+
+   /* create code->symbol translation table (symbols sorted by code) */
+   for (i = 0; i < num; ++i)
+   {
+      if (lengths[loffset + i]) t.trans[offs[lengths[loffset + i]]++] = i;
+   }
+}
+
+/* ---------------------- *
+ * -- decode functions -- *
+ * ---------------------- */
+
+/* get one bit from source stream */
+this.getbit = function(d)
+{
+   var bit;
+
+   /* check if tag is empty */
+   if (!d.bitcount--)
+   {
+      /* load next tag */
+      d.tag = d.source[d.sourceIndex++] & 0xff;
+      d.bitcount = 7;
+   }
+
+   /* shift bit out of tag */
+   bit = d.tag & 0x01;
+   d.tag >>= 1;
+
+   return bit;
+}
+
+/* read a num bit value from a stream and add base */
+this.read_bits = function(d, num, base)
+{
+    if (!num)
+        return base;
+
+    var val = 0;
+    while (d.bitcount < 24) {
+        d.tag = d.tag | (d.source[d.sourceIndex++] & 0xff) << d.bitcount;
+        d.bitcount += 8;
+    }
+    val = d.tag & (0xffff >> (16 - num));
+    d.tag >>= num;
+    d.bitcount -= num;
+    return val + base;
+}
+
+/* given a data stream and a tree, decode a symbol */
+this.decode_symbol = function(d, t)
+{
+    while (d.bitcount < 16) {
+        d.tag = d.tag | (d.source[d.sourceIndex++] & 0xff) << d.bitcount;
+        d.bitcount += 8;
+    }
+    
+    var sum = 0, cur = 0, len = 0;
+    do {
+        cur = 2 * cur + ((d.tag & (1 << len)) >> len);
+
+        ++len;
+
+        sum += t.table[len];
+        cur -= t.table[len];
+
+    } while (cur >= 0);
+
+    d.tag >>= len;
+    d.bitcount -= len;
+
+    return t.trans[sum + cur];
+}
+
+/* given a data stream, decode dynamic trees from it */
+this.decode_trees = function(d, lt, dt)
+{
+   var code_tree = new this.TREE();
+   var lengths = new Array(288+32);
+   var hlit, hdist, hclen;
+   var i, num, length;
+
+   /* get 5 bits HLIT (257-286) */
+   hlit = this.read_bits(d, 5, 257);
+
+   /* get 5 bits HDIST (1-32) */
+   hdist = this.read_bits(d, 5, 1);
+
+   /* get 4 bits HCLEN (4-19) */
+   hclen = this.read_bits(d, 4, 4);
+
+   for (i = 0; i < 19; ++i) lengths[i] = 0;
+
+   /* read code lengths for code length alphabet */
+   for (i = 0; i < hclen; ++i)
+   {
+      /* get 3 bits code length (0-7) */
+      var clen = this.read_bits(d, 3, 0);
+
+      lengths[this.clcidx[i]] = clen;
+   }
+
+   /* build code length tree */
+   this.build_tree(code_tree, lengths, 0, 19);
+
+   /* decode code lengths for the dynamic trees */
+   for (num = 0; num < hlit + hdist; )
+   {
+      var sym = this.decode_symbol(d, code_tree);
+
+      switch (sym)
+      {
+      case 16:
+         /* copy previous code length 3-6 times (read 2 bits) */
+         {
+            var prev = lengths[num - 1];
+            for (length = this.read_bits(d, 2, 3); length; --length)
+            {
+               lengths[num++] = prev;
+            }
+         }
+         break;
+      case 17:
+         /* repeat code length 0 for 3-10 times (read 3 bits) */
+         for (length = this.read_bits(d, 3, 3); length; --length)
+         {
+            lengths[num++] = 0;
+         }
+         break;
+      case 18:
+         /* repeat code length 0 for 11-138 times (read 7 bits) */
+         for (length = this.read_bits(d, 7, 11); length; --length)
+         {
+            lengths[num++] = 0;
+         }
+         break;
+      default:
+         /* values 0-15 represent the actual code lengths */
+         lengths[num++] = sym;
+         break;
+      }
+   }
+
+   /* build dynamic trees */
+   this.build_tree(lt, lengths, 0, hlit);
+   this.build_tree(dt, lengths, hlit, hdist);
+}
+
+/* ----------------------------- *
+ * -- block inflate functions -- *
+ * ----------------------------- */
+
+/* given a stream and two trees, inflate a block of data */
+this.inflate_block_data = function(d, lt, dt)
+{
+   // js optimization.
+   var ddest = d.dest;
+   var ddestlength = ddest.length;
+
+   while (1)
+   {
+      var sym = this.decode_symbol(d, lt);
+
+      /* check for end of block */
+      if (sym == 256)
+      {
+         return this.OK;
+      }
+
+      if (sym < 256)
+      {
+         ddest[ddestlength++] = sym; // ? String.fromCharCode(sym);
+         d.history.push(sym);
+      } else {
+
+         var length, dist, offs;
+         var i;
+
+         sym -= 257;
+
+         /* possibly get more bits from length code */
+         length = this.read_bits(d, this.length_bits[sym], this.length_base[sym]);
+
+         dist = this.decode_symbol(d, dt);
+
+         /* possibly get more bits from distance code */
+         offs = d.history.length - this.read_bits(d, this.dist_bits[dist], this.dist_base[dist]);
+
+         if (offs < 0)
+             throw ("Invalid zlib offset " + offs);
+         
+         /* copy match */
+         for (i = offs; i < offs + length; ++i) {
+            //ddest[ddestlength++] = ddest[i];
+            ddest[ddestlength++] = d.history[i];
+            d.history.push(d.history[i]);
+         }
+      }
+   }
+}
+
+/* inflate an uncompressed block of data */
+this.inflate_uncompressed_block = function(d)
+{
+   var length, invlength;
+   var i;
+
+   if (d.bitcount > 7) {
+       var overflow = Math.floor(d.bitcount / 8);
+       d.sourceIndex -= overflow;
+       d.bitcount = 0;
+       d.tag = 0;
+   }
+   
+   /* get length */
+   length = d.source[d.sourceIndex+1];
+   length = 256*length + d.source[d.sourceIndex];
+
+   /* get one's complement of length */
+   invlength = d.source[d.sourceIndex+3];
+   invlength = 256*invlength + d.source[d.sourceIndex+2];
+
+   /* check length */
+   if (length != (~invlength & 0x0000ffff)) return this.DATA_ERROR;
+
+   d.sourceIndex += 4;
+
+   /* copy block */
+   for (i = length; i; --i) {
+       d.history.push(d.source[d.sourceIndex]);
+       d.dest[d.dest.length] = d.source[d.sourceIndex++];
+   }
+
+   /* make sure we start next block on a byte boundary */
+   d.bitcount = 0;
+
+   return this.OK;
+}
+
+/* inflate a block of data compressed with fixed huffman trees */
+this.inflate_fixed_block = function(d)
+{
+   /* decode block using fixed trees */
+   return this.inflate_block_data(d, this.sltree, this.sdtree);
+}
+
+/* inflate a block of data compressed with dynamic huffman trees */
+this.inflate_dynamic_block = function(d)
+{
+   /* decode trees from stream */
+   this.decode_trees(d, d.ltree, d.dtree);
+
+   /* decode block using decoded trees */
+   return this.inflate_block_data(d, d.ltree, d.dtree);
+}
+
+/* ---------------------- *
+ * -- public functions -- *
+ * ---------------------- */
+
+/* initialize global (static) data */
+this.init = function()
+{
+   /* build fixed huffman trees */
+   this.build_fixed_trees(this.sltree, this.sdtree);
+
+   /* build extra bits and base tables */
+   this.build_bits_base(this.length_bits, this.length_base, 4, 3);
+   this.build_bits_base(this.dist_bits, this.dist_base, 2, 1);
+
+   /* fix a special case */
+   this.length_bits[28] = 0;
+   this.length_base[28] = 258;
+
+   this.reset();   
+}
+
+this.reset = function()
+{
+   this.d = new this.DATA(this);
+   delete this.header;
+}
+
+/* inflate stream from source to dest */
+this.uncompress = function(source, offset)
+{
+
+   var d = this.d;
+   var bfinal;
+
+   /* initialise data */
+   d.source = source;
+   d.sourceIndex = offset;
+   d.bitcount = 0;
+
+   d.dest = [];
+
+   // Skip zlib header at start of stream
+   if (typeof this.header == 'undefined') {
+       this.header = this.read_bits(d, 16, 0);
+       /* byte 0: 0x78, 7 = 32k window size, 8 = deflate */
+       /* byte 1: check bits for header and other flags */
+   }
+
+   var blocks = 0;
+   
+   do {
+
+      var btype;
+      var res;
+
+      /* read final block flag */
+      bfinal = this.getbit(d);
+
+      /* read block type (2 bits) */
+      btype = this.read_bits(d, 2, 0);
+
+      /* decompress block */
+      switch (btype)
+      {
+      case 0:
+         /* decompress uncompressed block */
+         res = this.inflate_uncompressed_block(d);
+         break;
+      case 1:
+         /* decompress block with fixed huffman trees */
+         res = this.inflate_fixed_block(d);
+         break;
+      case 2:
+         /* decompress block with dynamic huffman trees */
+         res = this.inflate_dynamic_block(d);
+         break;
+      default:
+         return { 'status' : this.DATA_ERROR };
+      }
+
+      if (res != this.OK) return { 'status' : this.DATA_ERROR };
+      blocks++;
+      
+   } while (!bfinal && d.sourceIndex < d.source.length);
+
+   d.history = d.history.slice(-this.WINDOW_SIZE);
+   
+   return { 'status' : this.OK, 'data' : d.dest };
+}
+
+};

include/rfb.js

@@ -4,6 +4,9 @@
  * Licensed under LGPL-3 (see LICENSE.txt)
  *
  * See README.md for usage and integration instructions.
+ *
+ * TIGHT decoder portion:
+ * (c) 2012 Michael Tinglof, Joe Balaz, Les Piech (Mercuri.ca)
  */
 
 /*jslint white: false, browser: true, bitwise: false, plusplus: false */
@@ -46,6 +49,7 @@ var that           = {},  // Public API methods
     // In preference order
     encodings      = [
         ['COPYRECT',         0x01 ],
+        ['TIGHT',            0x07 ],
         ['TIGHT_PNG',        -260 ],
         ['HEXTILE',          0x05 ],
         ['RRE',              0x02 ],
@@ -54,10 +58,12 @@ var that           = {},  // Public API methods
         ['Cursor',           -239 ],
 
         // Psuedo-encoding settings
-        ['JPEG_quality_lo',   -32 ],
+        //['JPEG_quality_lo',   -32 ],
+        ['JPEG_quality_med',    -26 ],
         //['JPEG_quality_hi',   -23 ],
-        ['compress_lo',      -255 ]
-        //['compress_hi',      -247 ]
+        //['compress_lo',      -255 ],
+        ['compress_hi',        -247 ],
+        ['last_rect',          -224 ]
         ],
 
     encHandlers    = {},
@@ -87,7 +93,9 @@ var that           = {},  // Public API methods
         encoding       : 0,
         subencoding    : -1,
         background     : null,
-        imgQ           : []   // TIGHT_PNG image queue
+        imgQ           : [],  // TIGHT_PNG image queue
+        zlibs          : [],  // TIGHT zlib streams
+        palette        : null
     },
 
     fb_Bpp         = 4,
@@ -270,14 +278,18 @@ function constructor() {
 
 function connect() {
     Util.Debug(">> RFB.connect");
+    var uri;
     
-    var uri = "";
+    if (typeof UsingSocketIO !== "undefined") {
+        uri = "http://" + rfb_host + ":" + rfb_port + "/" + rfb_path;
+    } else {
         if (conf.encrypt) {
             uri = "wss://";
         } else {
             uri = "ws://";
         }
         uri += rfb_host + ":" + rfb_port + "/" + rfb_path;
+    }
     Util.Info("connecting to " + uri);
     ws.open(uri);
 
@@ -296,6 +308,7 @@ init_vars = function() {
     FBU.lines        = 0;  // RAW
     FBU.tiles        = 0;  // HEXTILE
     FBU.imgQ         = []; // TIGHT_PNG image queue
+    FBU.zlibs        = []; // TIGHT zlib encoders
     mouse_buttonMask = 0;
     mouse_arr        = [];
 
@@ -303,6 +316,12 @@ init_vars = function() {
     for (i=0; i < encodings.length; i+=1) {
         encStats[encodings[i][1]][0] = 0;
     }
+    
+    for (i=0; i < 4; i++) {
+        //FBU.zlibs[i] = new InflateStream();
+        FBU.zlibs[i] = new TINF();
+        FBU.zlibs[i].init();
+    }
 };
 
 // Print statistics
@@ -976,6 +995,11 @@ framebufferUpdate = function() {
                      'encoding': FBU.encoding,
                      'encodingName': encNames[FBU.encoding]});
 
+            if (encNames[FBU.encoding] == 'last_rect') {
+                FBU.rects = 0;
+                break;
+            }
+            
             if (encNames[FBU.encoding]) {
                 // Debug:
                 /*
@@ -1257,6 +1281,248 @@ encHandlers.HEXTILE = function display_hextile() {
 };
 
 
+encHandlers.TIGHT = function display_tight() {
+    Util.Debug(">> display_tight");
+
+    if (fb_depth == 1) {
+        fail("Tight protocol handler only implements true color mode");
+    }
+
+    var ctl, cmode, clength, getCLength, color, img, data;
+    var filterId = -1, resetStreams = 0, streamId = -1;
+    var rQ = ws.get_rQ(), rQi = ws.get_rQi(); 
+
+    FBU.bytes = 1; // compression-control byte
+    if (ws.rQwait("TIGHT compression-control", FBU.bytes)) { return false; }
+    
+    // Get 'compact length' header and data size
+    getCLength = function (arr) {
+        var header = 1, data = 0;
+        data += arr[0] & 0x7f;
+        if (arr[0] & 0x80) {
+            header += 1;
+            data += (arr[1] & 0x7f) << 7;
+            if (arr[1] & 0x80) {
+                header += 1;
+                data += arr[2] << 14;
+            }
+        }
+        return [header, data];
+    };
+
+    var checksum = function(data) {
+        var sum=0, i;
+        for (i=0; i<data.length;i++) {
+            sum += data[i];
+            if (sum > 65536) sum -= 65536;
+        }
+        return sum;
+    }
+    
+    var decompress = function(data) {
+        for (var i=0; i<4; i++) {
+            if ((resetStreams >> i) & 1) {
+                FBU.zlibs[i].reset();
+                Util.Info("Reset zlib stream " + i);
+            }
+        }
+        var uncompressed = FBU.zlibs[streamId].uncompress(data, 0);
+        if (uncompressed.status !== 0)
+            Util.Error("Invalid data in zlib stream");
+        //Util.Warn("Decompressed " + data.length + " to " + uncompressed.data.length + " checksums " + 
+        //    checksum(data) + ":" + checksum(uncompressed.data));
+        
+        return uncompressed.data;
+    }
+
+    var handlePalette = function() {
+        var numColors = rQ[rQi + 2] + 1;
+        var paletteSize = numColors * fb_depth; 
+        FBU.bytes += paletteSize;
+        if (ws.rQwait("TIGHT palette " + cmode, FBU.bytes)) { return false; }
+
+        var bpp = (numColors <= 2) ? 1 : 8;
+        var rowSize = Math.floor((FBU.width * bpp + 7) / 8);
+        var raw = false;
+        if (rowSize * FBU.height < 12) {
+            raw = true;
+            clength = [0, rowSize * FBU.height];
+        }
+        else
+            clength = getCLength(ws.rQslice(3 + paletteSize, 3 + paletteSize + 3));
+        FBU.bytes += clength[0] + clength[1];
+        if (ws.rQwait("TIGHT " + cmode, FBU.bytes)) { return false; }
+
+        // Shift ctl, filter id, num colors, palette entries, and clength off
+        ws.rQshiftBytes(3); 
+        FBU.palette = ws.rQshiftBytes(paletteSize);
+        ws.rQshiftBytes(clength[0]);
+        
+        if (raw)
+            data = ws.rQshiftBytes(clength[1]);
+        else
+            data = decompress(ws.rQshiftBytes(clength[1]));
+
+        // Convert indexed (palette based) image data to RGB
+        // TODO: reduce number of calculations inside loop
+        var dest = [];
+        var x, y, b;
+        if (numColors == 2) {
+          var w = Math.floor((FBU.width + 7) / 8);
+          var w1 = Math.floor(FBU.width / 8);
+          for (y = 0; y < FBU.height; y++) {
+            for (x = 0; x < w1; x++) {
+              for (b = 7; b >= 0; b--) {
+                  var dp = (y*FBU.width + x*8 + 7-b) * 3;
+                  var sp = (data[y*w + x] >> b & 1) * 3;
+                  dest[dp  ] = FBU.palette[sp  ];    
+                  dest[dp+1] = FBU.palette[sp+1];    
+                  dest[dp+2] = FBU.palette[sp+2];    
+              }
+            }
+            for (b = 7; b >= 8 - FBU.width % 8; b--) {
+              var dp = (y*FBU.width + x*8 + 7-b) * 3;
+              var sp = (data[y*w + x] >> b & 1) * 3;
+              dest[dp  ] = FBU.palette[sp  ];    
+              dest[dp+1] = FBU.palette[sp+1];    
+              dest[dp+2] = FBU.palette[sp+2];    
+            }
+          }
+        } else {
+          for (y = 0; y < FBU.height; y++) {
+            for (x = 0; x < FBU.width; x++) {
+              var dp = (y*FBU.width + x) * 3;
+              var sp = data[y*FBU.width + x] * 3;
+              dest[dp  ] = FBU.palette[sp  ];
+              dest[dp+1] = FBU.palette[sp+1];    
+              dest[dp+2] = FBU.palette[sp+2];    
+            }
+          }
+        }
+  
+        FBU.imgQ.push({
+                'type': 'rgb',
+                'img':  {'complete': true, 'data': dest},
+                'x': FBU.x,
+                'y': FBU.y,
+                'width': FBU.width,
+                'height': FBU.height});
+        return true;
+    }
+
+    var handleCopy = function() {
+        var raw = false;
+        var uncompressedSize = FBU.width * FBU.height * fb_depth;
+        if (uncompressedSize < 12) {
+            raw = true;
+            clength = [0, uncompressedSize];
+        }
+        else
+            clength = getCLength(ws.rQslice(1, 4));
+        FBU.bytes = 1 + clength[0] + clength[1];
+        if (ws.rQwait("TIGHT " + cmode, FBU.bytes)) { return false; }
+
+        // Shift ctl, clength off
+        ws.rQshiftBytes(1 + clength[0]);
+
+        if (raw)
+            data = ws.rQshiftBytes(clength[1]);
+        else
+            data = decompress(ws.rQshiftBytes(clength[1]));
+
+        FBU.imgQ.push({
+                'type': 'rgb',
+                'img':  {'complete': true, 'data': data},
+                'x': FBU.x,
+                'y': FBU.y,
+                'width': FBU.width,
+                'height': FBU.height});
+        return true;
+    }
+    
+    ctl = ws.rQpeek8();
+    
+    // Keep tight reset bits
+    resetStreams = ctl & 0xF;
+    
+    // Figure out filter
+    ctl = ctl >> 4; 
+    streamId = ctl & 0x3;
+
+    if (ctl == 0x08) cmode = "fill";
+    else if (ctl == 0x09) cmode = "jpeg";
+    else if (ctl & 0x04) cmode = "filter";
+    else if (ctl < 0x04) cmode = "copy";
+    else throw("Illegal tight compression received, ctl: " + ctl);
+    
+    switch (cmode) {
+        // fill uses fb_depth because TPIXELs drop the padding byte
+        case "fill": FBU.bytes += fb_depth; break; // TPIXEL
+        case "jpeg": FBU.bytes += 3;        break; // max clength
+        case "filter": FBU.bytes += 2;      break; // filter id + num colors if palette
+        case "copy":                        break;
+    }
+
+    if (ws.rQwait("TIGHT " + cmode, FBU.bytes)) { return false; }
+
+    //Util.Debug("   ws.rQslice(0,20): " + ws.rQslice(0,20) + " (" + ws.rQlen() + ")");
+    //Util.Debug("   cmode: " + cmode);
+
+    // Determine FBU.bytes
+    switch (cmode) {
+    case "fill":
+        ws.rQshift8(); // shift off ctl
+        color = ws.rQshiftBytes(fb_depth);
+        FBU.imgQ.push({
+                'type': 'fill',
+                'img': {'complete': true},
+                'x': FBU.x,
+                'y': FBU.y,
+                'width': FBU.width,
+                'height': FBU.height,
+                'color': [color[2], color[1], color[0]] });
+        break;
+    case "jpeg":
+        clength = getCLength(ws.rQslice(1, 4));
+        FBU.bytes = 1 + clength[0] + clength[1]; // ctl + clength size + jpeg-data
+        if (ws.rQwait("TIGHT " + cmode, FBU.bytes)) { return false; }
+
+        // We have everything, render it
+        //Util.Debug("   png, ws.rQlen(): " + ws.rQlen() + ", clength[0]: " + clength[0] + ", clength[1]: " + clength[1]);
+        ws.rQshiftBytes(1 + clength[0]); // shift off ctl + compact length
+        img = new Image();
+        //img.onload = scan_tight_imgQ;
+        FBU.imgQ.push({
+                'type': 'img',
+                'img': img,
+                'x': FBU.x,
+                'y': FBU.y});
+        img.src = "data:image/" + cmode +
+            extract_data_uri(ws.rQshiftBytes(clength[1]));
+        img = null;
+        break;
+    case "filter":
+        filterId = rQ[rQi + 1];
+        if (filterId == 1) {
+            if (!handlePalette()) { return false; }
+        } else {
+            // Filter 0, Copy could be valid here, but servers don't send it as an explicit filter
+            // Filter 2, Gradient is valid but not used if jpeg is enabled
+            throw("Unsupported tight subencoding received, filter: " + filterId);                
+        }
+        break;
+    case "copy":
+        if (!handleCopy()) { return false; }
+        break;
+    }
+    
+    FBU.bytes = 0;
+    FBU.rects -= 1;
+    //Util.Debug("   ending ws.rQslice(0,20): " + ws.rQslice(0,20) + " (" + ws.rQlen() + ")");
+    //Util.Debug("<< display_tight_png");
+    return true;
+};
+
 encHandlers.TIGHT_PNG = function display_tight_png() {
     //Util.Debug(">> display_tight_png");
     var ctl, cmode, clength, getCLength, color, img;
@@ -1360,6 +1626,8 @@ scan_tight_imgQ = function() {
             data = imgQ.shift();
             if (data.type === 'fill') {
                 display.fillRect(data.x, data.y, data.width, data.height, data.color);
+            } else if (data.type === 'rgb') {
+                display.blitRgbImage(data.x, data.y, data.width, data.height, data.img.data, 0);
             } else {
                 ctx.drawImage(data.img, data.x, data.y);
             }

include/vnc.js

@@ -32,10 +32,13 @@ function get_INCLUDE_URI() {
     extra += start + "webutil.js" + end;
     extra += start + "base64.js" + end;
     extra += start + "websock.js" + end;
+    // extra += start + "socketio.js" + end;
     extra += start + "des.js" + end;
     extra += start + "input.js" + end;
     extra += start + "display.js" + end;
+    extra += start + "blowfish.js" + end;
     extra += start + "rfb.js" + end;
+    extra += start + "jsunzip.js" + end;
 
     document.write(extra);
 }());