init

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--- a/nv/html/dwv/tests/image/index.html
+++ b/nv/html/dwv/tests/image/index.html
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+<!DOCTYPE html>
+<html>
+<head>
+<title>DWV Colour Maps</title>
+<meta charset="UTF-8">
+<script type="text/javascript" src="../../src/image/luts.js"></script>
+<script type="text/javascript">
+function createImage(colourMapName, colourMap)
+{
+    // default size
+    var height = 40;
+    var width = 256;
+    // create canvas
+    var canvas = document.createElement("canvas");
+    canvas.width = width;
+    canvas.height = height;
+    var context = canvas.getContext("2d");
+    // fill in the image data
+    var imageData = context.createImageData(canvas.width, canvas.height);
+    var index = 0;
+    for( var j=0; j<canvas.height; ++j ) {
+        for( var i=0; i<canvas.width; ++i ) {
+            index = (i + j * imageData.width) * 4;
+            imageData.data[index] = colourMap.red[i];
+            imageData.data[index+1] = colourMap.green[i];
+            imageData.data[index+2] = colourMap.blue[i];
+            imageData.data[index+3] = 0xff;
+        }
+    }
+    // put the image data in the context
+    context.putImageData(imageData, 0, 0);
+
+    // html
+    var div = document.createElement("div");
+    div.id = colourMapName;
+    var paragraph = document.createElement("p");
+    var link = document.createElement("a");
+    link.href = canvas.toDataURL("image/png");
+    link.appendChild(document.createTextNode(colourMapName));
+    // put all together
+    paragraph.appendChild(link);
+    div.appendChild(paragraph);
+    div.appendChild(canvas);
+    // add to the document
+    document.body.appendChild(div);
+}
+</script>
+<style>
+body { font-family: Arial, Helvetica, sans-serif; }
+</style>
+</head>
+
+<body>
+
+<h1>The DWV colour maps</h1>
+
+<script type="text/javascript">
+window.onload = function() {
+    createImage("Plain", dwv.image.lut.plain);
+    createImage("InvPlain", dwv.image.lut.invPlain);
+    createImage("Rainbow", dwv.image.lut.rainbow);
+    createImage("Hot", dwv.image.lut.hot);
+    createImage("Hot Iron", dwv.image.lut.hot_iron);
+    createImage("Pet", dwv.image.lut.pet);
+    createImage("Hot Metal Blue", dwv.image.lut.hot_metal_blue);
+    createImage("Pet 20 step", dwv.image.lut.pet_20step);
+    createImage("Test", dwv.image.lut.test);
+}
+</script>
+
+</body>
+</html>