| New file |
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| 0,0 → 1,104 |
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| <html> |
| <head> |
| <title>Compress colors</title> |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> |
| <style type="text/css"> |
| @import "../../../dojo/resources/dojo.css"; |
| @import "../../../dijit/tests/css/dijitTests.css"; |
| |
| .pane { margin-top: 2em; } |
| </style> |
| <script type="text/javascript" src="../../../dojo/dojo.js" djConfig="isDebug: true"></script> |
| <script type="text/javascript"> |
| dojo.require("dojox.encoding.tests.colors"); |
| dojo.require("dojox.encoding.easy64"); |
| dojo.require("dojox.encoding.bits"); |
| dojo.require("dojox.encoding.splay"); |
| dojo.require("dojox.encoding.lzw"); |
| |
| var dc = dojox.encoding, colors = dc.tests.colors; |
| |
| var run = function(){ |
| var empty = {}, names = []; |
| for(var i in colors){ |
| if(i in empty){ continue; } |
| names.push(i); |
| } |
| names.sort(); |
| var output = new dc.bits.OutputStream(), result = []; |
| // encode names |
| var s = names.join("{"), encoder = new dc.lzw.Encoder(27); |
| result.push("<div>Input is " + s.length + " bytes long.</div>"); |
| result.push("<div>Input: " + s + ".</div>"); |
| for(var i = 0; i < s.length; ++i){ |
| var v = s.charCodeAt(i) - 97; |
| if(v < 0 || v > 26) console.debug("error!", v); |
| encoder.encode(v, output); |
| } |
| encoder.flush(output); |
| var w = output.getWidth(); |
| result.push("<div>Output is " + Math.ceil(w / 8) + " bytes (" + w + " bits) long.</div>"); |
| var buf = output.getBuffer(); |
| { |
| var input = new dc.bits.InputStream(buf, buf.length * 8), decoder = new dc.lzw.Decoder(27); |
| var t = []; |
| for(var w = 0; w < s.length;){ |
| var v = decoder.decode(input); |
| t.push(v); |
| w += v.length; |
| } |
| t = t.join(""); |
| var p = []; |
| for(var i = 0; i < t.length; ++i){ |
| p.push(String.fromCharCode(t.charCodeAt(i) + 97)); |
| } |
| p = p.join(""); |
| result.push("<div>Control: " + p + ".</div>"); |
| } |
| while(buf.length % 3){ buf.push(0); } |
| var e64 = dc.easy64.encode(buf); |
| result.push("<div>Encoded output is " + e64.length + " bytes.</div>"); |
| result.push("<div><textarea>" + e64 + "</textarea></div>"); |
| // test |
| { |
| var buf = dc.easy64.decode(e64); |
| var input = new dc.bits.InputStream(buf, buf.length * 8), decoder = new dc.lzw.Decoder(27); |
| var t = []; |
| for(var w = 0; w < s.length;){ |
| var v = decoder.decode(input); |
| t.push(v); |
| w += v.length; |
| } |
| t = t.join(""); |
| var p = []; |
| for(var i = 0; i < t.length; ++i){ |
| p.push(String.fromCharCode(t.charCodeAt(i) + 97)); |
| } |
| p = p.join(""); |
| result.push("<div>Control: " + p + ".</div>"); |
| } |
| // encode values |
| buf = []; |
| for(var i = 0; i < names.length; ++i){ |
| var c = colors[names[i]]; |
| buf.push(c[0], c[1], c[2]); |
| } |
| result.push("<div>Output is " + buf.length + " bytes long.</div>"); |
| while(buf.length % 4){ buf.push(0); } |
| e64 = dc.easy64.encode(buf); |
| result.push("<div>Encoded output is " + e64.length + " bytes.</div>"); |
| result.push("<div><textarea>" + e64 + "</textarea></div>"); |
| dojo.byId("status").innerHTML = result.join("\n"); |
| }; |
| |
| dojo.addOnLoad(function(){ |
| dojo.connect(dojo.byId("run"), "onclick", run); |
| }); |
| </script> |
| </head> |
| <body> |
| <h1>Compress colors</h1> |
| <p><button id="run">Run</button></p> |
| <div id="status" class="pane"><em>No status yet.</em></div> |
| </body> |
| </html> |