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gaia/apps/camera/js/lib/resize-image-and-save.js

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+define(function(require, exports, module) {
+'use strict';
+
+var Storage = require('lib/storage');
+var cropResizeRotate = require('cropResizeRotate');
+
+/**
+ * Exports
+ */
+
+module.exports = function(options, done) {
+  var blob = options.blob;
+  var outputSize = options.width && options.height ?
+    {
+      width: options.width,
+      height: options.height
+    } : options.size || null;
+
+  cropResizeRotate(blob, null, outputSize, 'image/jpeg+exif',
+                   function(error, resizedBlob) {
+
+    // If we couldn't resize or rotate it, use the original
+    if (error) {
+      console.error('Error while resizing image: ' + error);
+      done(blob);
+      return;
+    }
+
+    // We need to send a file-backed blob as the result of a pick activity
+    // (see bug 975599) so we'll overwrite the old blob with the new one.
+    // This means that the image stored will actually match the one passed
+    // to the app that initiated the pick activity. We delete the old file,
+    // then save the new blob with the same name. Then we read the file and
+    // pass that to the callback.
+    if (resizedBlob === blob) {
+      done(blob);
+      return;
+    }
+
+    var storage = new Storage();
+    // We first delete the full resolution picture
+    storage.deletePicture(blob.name, addPicture);
+    // We save the scaled down image
+    function addPicture(error) {
+      if (error) {
+        done(blob);
+        return;
+      }
+      storage.addPicture(resizedBlob, {
+        filepath: blob.name
+      }, onSavedPicture);
+    }
+
+    function onSavedPicture(error, filepath, absolutePath, fileBlob) {
+      done(fileBlob);
+    }
+
+  });
+};
+
+});