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block_filler_example.html
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<!DOCTYPE html>
<html>
<head>
<title>metaworker examples - block filler</title>
</head>
<script src='http://www.google.com/jsapi'></script>
<script> google.load("jquery", "1.3.2"); </script>
<body style="background-color:#fff">
<h1>metaworker examples - block filler</h1>
<pre id="counter"></pre>
<div id="images"></div>
<canvas id="canv" width="500" height="500" style="border:7px solid black; background-color:#111111;"></canvas>
</body>
<script type="text/javascript" src="metaworker_lib.js"></script>
<script type="text/javascript">
var drawBox = function(box){
var canvas = document.getElementById('canv');
if (canvas.getContext){
var ctx = canvas.getContext('2d');
for (var i = 0; i < box.length; i ++) {
ctx.fillStyle = box[i].color;
ctx.fillRect(box[i].x * 10, box[i].y * 10, 10, 10);
}
}
};
var work = [];
for (var x = 0; x < 500; x+=10) {
for (var y = 0; y < 500; y+= 10) {
work.push({
x: x / 10,
y: y / 10
});
}
}
var counter = 0;
setInterval(function(){
document.getElementById("counter").innerHTML = (new Date()).toString();
counter++;
},1000);
var w = metaworker({
workerType:(document.location.href.indexOf("workerType=ajax")>-1)?"ajax":"local",
// this is only used if workerType=="ajax"
servers: ["http://127.0.0.1:8000/", "http://129.97.9.230:8000/"],
maxWorkers: 6,
partitionSize: 3,
randomize: true,
mapper: function(work) {
for(var i = 0; i < work.length; i ++) {
if ( process.platform == 'darwin' ) {
work[i].color = 'red';
} else if ( process.platform == 'linux2' ) {
work[i].color = 'blue';
} else {
work[i].color = 'green';
}
}
return work;
},
onIntermediateResults: function(intermediate_results){
for(var i=0;i<intermediate_results.length;i++){
drawBox(intermediate_results[i]);
}
},
reducer: function(existing_results, intermediate_results){
for(var i=0;i<intermediate_results.length;i++){
if(intermediate_results[i].length > 0){
for(var ir=0;ir<intermediate_results[i].length;ir++){
existing_results.push(intermediate_results[i][ir]);
}
}
}
return existing_results;
},
parallel: true,
work: work,
callback:function(result){
}
});
w.start();
</script>
</html>