diff --git a/glue/core.py b/glue/core.py
index 05fd691..fbe31bf 100644
--- a/glue/core.py
+++ b/glue/core.py
@@ -45,6 +45,8 @@ def __init__(self, path, config):
 
         self.x = self.y = None
         self.original_width = self.original_height = 0
+        # Cocos2dx offset
+        self.offsetX = self.offsetY = 0
 
         with open(self.path, "rb") as img:
             self._image_data = img.read()
@@ -77,7 +79,10 @@ def image(self):
         # without losing any non-transparent pixel.
         # This crop is only used if the crop flag is set in the config.
         if self.config['crop']:
-            img = img.crop(img.split()[-1].getbbox())
+            croppedBox = img.split()[-1].getbbox()
+            img = img.crop(croppedBox)
+            self.offsetX = croppedBox[0] + (img.size[0]/2) - (self.original_width/2)
+            self.offsetY = (self.original_height/2) - croppedBox[1] - (img.size[1]/2)
         return img
 
     @property
diff --git a/glue/formats/base.py b/glue/formats/base.py
index 81fa8fd..4c8f509 100644
--- a/glue/formats/base.py
+++ b/glue/formats/base.py
@@ -111,6 +111,10 @@ def get_context(self, *args, **kwargs):
                                           y=round_up(base_y / self.sprite.max_ratio * r),
                                           abs_x=round_up(base_abs_x / self.sprite.max_ratio * r),
                                           abs_y=round_up(base_abs_y / self.sprite.max_ratio * r),
+                                          original_width=round_up(img.original_width / r),
+                                          original_height=round_up(img.original_height / r),
+                                          offsetX=round_up(img.offsetX / r),
+                                          offsetY=round_up(img.offsetY / r),
                                           height=round_up((img.height + img.padding[0] + img.padding[2]) / self.sprite.max_ratio * r),
                                           width=round_up((img.width + img.padding[1] + img.padding[3]) / self.sprite.max_ratio * r))
 
diff --git a/glue/formats/cocos2d.py b/glue/formats/cocos2d.py
index ccbeaf6..24f56cb 100644
--- a/glue/formats/cocos2d.py
+++ b/glue/formats/cocos2d.py
@@ -34,12 +34,18 @@ def get_context(self, ratio, *args, **kwargs):
                              'textureFileName': ratio_context['sprite_filename']
                 }
         }
+
+        # frame: sprite location within the sprite-sheet as position and size values
+        # offset: difference between the original center of the sprite and the center of the cropped sprite
+        # rotated: whether or not the sprite has been rotated within the sprite-sheet
+        # sourceColorRect: rectangle with actual color information inside your source sprite
+        # sourceSize: size of the original sprite
         for i in context['images']:
             image_context = i['ratios'][ratio]
             rect = '{{{{{abs_x}, {abs_y}}}, {{{width}, {height}}}}}'.format(**image_context)
             data['frames'][i['filename']] = {'frame': rect,
-                                             'offset': '{0,0}',
+                                             'offset': '{{{offsetX},{offsetY}}}'.format(**image_context),
                                              'rotated': False,
                                              'sourceColorRect': rect,
-                                             'sourceSize': '{{{width}, {height}}}'.format(**image_context)}
+                                             'sourceSize': '{{{original_width}, {original_height}}}'.format(**image_context)}
         return data