split out image ajax utility

1 files changed, 47 insertions, 0 deletions

diff --git a/js/images.js b/js/images.js
new file mode 100644
index 0000000..ffb7dad
--- /dev/null
+++ b/js/images.js
@@ -0,0 +1,47 @@
+function loadImage(imageURL, callback) {
+  var imageURL = proxify( imageURL );
+
+  window.gif = window.img = null
+
+  if (imageURL.substr(-3) === "gif") {
+    window.gif = GIF(imageURL);
+    // gif.on("error", tryToLoadNextImage);
+    // gif.on("rendered", trackLoadTime);
+    gif.on("rendered", callback);
+    return gif.render();
+  } else {
+    window.img = new Image();
+    // img.addEventListener("error", tryToLoadNextImage);
+    img.addEventListener("load", callback);
+    img.crossOrigin = "anonymous";
+    return img.src = imageURL;
+  }
+}
+
+function giveImage(t) {
+  if (window.gif) {
+    return gif.frames[gif.currentFrame(t)];
+  } else {
+    return img;
+  }
+}
+
+function proxify (url) {
+  if (url.indexOf("http") == 0)
+    return "/cgi-bin/proxy?" + url // .replace(/^https?:\/\//, "");
+  else
+    return url
+}
+
+function filesize(n) {
+  if (n < 1e3) return n + " bytes"
+  if (n < 1e6) return decimalString(n/1e3) + " kb"
+  if (n < 1e9) return decimalString(n/1e6) + " mb"
+  return "WAY TOO BIG DUDE"
+}
+function decimalString(n){
+  var m = Math.floor(n);
+  return m + "." + Math.round((n-m)*10)
+}
+
+