blockies-npm - npm Package Compare versions

Comparing version 0.0.0 to 0.0.1

index.js

@@ -1,22 +0,33 @@
-(function() {
-  // The output is pretty uniform, so it's probably fine
-  var randseed = 0;
-  function seedrand(s) {
-    randseed = 0;
-    for(var i = 0; i < s.length; i += 2) {
-      var h = (s.charCodeAt(i) << 8) | s.charCodeAt(i + 1);
-      randseed ^= h;
+module.exports = (function() {
+  // The random number is a js implementation of the Xorshift PRNG
+  var randseed = new Array(4); // Xorshift: [x, y, z, w] 32 bit values
+
+  function seedrand(seed) {
+    for (var i = 0; i < randseed.length; i++) {
+      randseed[i] = 0;
     }
+    for (var i = 0; i < seed.length; i++) {
+      randseed[i%4] = ((randseed[i%4] << 5) - randseed[i%4]) + seed.charCodeAt(i);
+    }
   }
+
   function rand() {
-    var n = (Math.sin(randseed++) + 1) / 2; // Move range from -1 - 1 to 0 - 1
-    var r = n * 10000; // Remove first few digits since they tend to have low entropy
-    n = r - Math.floor(r);
-    return n;
+    // based on Java's String.hashCode(), expanded to 4 32bit values
+    var t = randseed[0] ^ (randseed[0] << 11);
+
+    randseed[0] = randseed[1];
+    randseed[1] = randseed[2];
+    randseed[2] = randseed[3];
+    randseed[3] = (randseed[3] ^ (randseed[3] >> 19) ^ t ^ (t >> 8));
+
+    return (randseed[3]>>>0) / ((1 << 31)>>>0);
   }
 
   function createColor() {
+    //saturation is the whole color spectrum
     var h = Math.floor(rand() * 360);
-    var s = ((rand() * 50) + 50) + '%';
-    var l = ((rand() * 60) + 20) + '%';
+    //saturation goes from 40 to 100, it avoids greyish colors
+    var s = ((rand() * 60) + 40) + '%';
+    //lightness can be anything from 0 to 100, but probabilities are a bell curve around 50%
+    var l = ((rand()+rand()+rand()+rand()) * 25) + '%';
 
@@ -38,3 +49,5 @@ var color = 'hsl(' + h + ',' + s + ',' + l + ')';
       for(var x = 0; x < dataWidth; x++) {
-        row[x] = rand() >= 0.5;
+        // this makes foreground and background color to have a 43% (1/2.3) probability
+        // spot color has 13% chance
+        row[x] = Math.floor(rand()*2.3);
       }
@@ -53,3 +66,3 @@ var r = row.slice(0, mirrorWidth);
 
-  function createCanvas(imageData, color, scale, bgcolor) {
+  function createCanvas(imageData, color, scale, bgcolor, spotcolor) {
     var c = document.createElement('canvas');
@@ -67,3 +80,6 @@ var width = Math.sqrt(imageData.length);
       var col = i % width;
+      // if data is 2, choose spot color, if 1 choose foreground
+      cc.fillStyle = (imageData[i] == 1) ? color : spotcolor;
 
+      // if data is 0, leave the background
       if(imageData[i]) {
@@ -79,6 +95,5 @@ cc.fillRect(col * scale, row * scale, scale, scale);
     opts = opts || {};
-    var size = opts.size || 10;
-    var scale = opts.scale || 5;
-    var seed = opts.seed || Math.random().toString(36).substr(2);
-    var bgcolor = opts.bgcolor || '#fff';
+    var size = opts.size || 8;
+    var scale = opts.scale || 4;
+    var seed = opts.seed || Math.floor((Math.random()*Math.pow(10,16))).toString(16);
 
@@ -88,4 +103,6 @@ seedrand(seed);
     var color = opts.color || createColor();
+    var bgcolor = opts.bgcolor || createColor();
+    var spotcolor = opts.spotcolor || createColor();
     var imageData = createImageData(size);
-    var canvas = createCanvas(imageData, color, scale, bgcolor);
+    var canvas = createCanvas(imageData, color, scale, bgcolor, spotcolor);
 
@@ -96,2 +113,2 @@ return canvas;
   return createIcon;
-})();
+})();

package.json

 {
   "name": "blockies-npm",
-  "version": "0.0.0",
-  "description": "npm package for blockies https://github.com/download13/blockies",
-  "main": "index.js",
+  "version": "0.0.1",
+  "description": "npm package for blockies https://github.com/alexvandesande/blockies",
+  "main": "build/index.js",
   "scripts": {
@@ -17,3 +17,3 @@ "test": "echo \"Error: no test specified\" && exit 1"
   ],
-  "author": "goldylucks <[e-mail]>",
+  "author": "goldylucks",
   "license": "GPL-3.0",
@@ -20,0 +20,0 @@ "bugs": {

README.md

 # blockies-npm
-npm package for blockies https://github.com/download13/blockies
+npm package for blockies https://github.com/alexvandesande/blockies

No alert changes

Improved metrics

Total package byte prevSize

40143

5.29%

Lines of code

86

16.22%

No dependency changes