created ShadeMyCanvas (smc)

www/js/smc/util.js

@@ -0,0 +1,24 @@
+export { hexToRgba, hexToRgbaNormal };
+
+/* Converts a string of the form "#XXXXXX"
+ * 
+*/
+function hexToRgba(hex) {
+  var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})?$/i.exec(hex.toLowerCase());
+  return result ? {
+    r: parseInt(result[1], 16),
+    g: parseInt(result[2], 16),
+    b: parseInt(result[3], 16),
+    a: result.length == 4 ? parseInt(result[4], 16) : 255.,
+  } : null;
+}
+
+function hexToRgbaNormal(hex) {
+  var result = hexToRgba(hex);
+  return result ? {
+    r: result.r / 255.,
+    g: result.g / 255.,
+    b: result.b / 255.,
+    a: result.a / 255.,
+  } : null;
+}