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gaia/apps/camera/js/lib/create-thumbnail-image.js

@@ -0,0 +1,35 @@
+define(function(require, exports, module) {
+'use strict';
+
+var cropResizeRotate = require('cropResizeRotate');
+
+/**
+ * Create a thumbnail size canvas,
+ * copy the <img> or <video> into it
+ * cropping the edges as needed to
+ * make it fit, and then extract the
+ * thumbnail image as a blob and pass
+ * it to the callback.
+ *
+ * @param  {Blob}     imageBlob     [description]
+ * @param  {Object}   metadata      [description]
+ * @param  {Object}   thumbnailSize [description]
+ * @param  {Function} done          [description]
+ */
+module.exports = function(imageBlob, metadata, thumbnailSize, done) {
+  cropResizeRotate(imageBlob, null, thumbnailSize, null, metadata,
+    function(error, resizedBlob) {
+
+      // If we couldn't resize or rotate it, use the original
+      if (error) {
+        console.error('Error while resizing image: ' + error);
+        done(imageBlob);
+        return;
+      }
+
+      done(resizedBlob);
+    }
+  );
+};
+
+});