title: How to calculate RAM usage of a image when decoded
body: <p>How do I can determine the ammount of RAM used by a image when loaded?</p>
  
  <p>For standard I think that a image size on RAM will be width * height * PIXEL_FORMAT, where PIXEL_FORMAT will be RGB (3 bits) or ARGB (4 bits)</p>
  
  <p>But for my calc, a 64*64(ARGB) image will have 2MB of memory usage, that I'm pretty sure is a wrong result.</p>
  
  <p>Is a decoded image loaded as a compressed image and decompressed for drawing/drawed compressed through decompressers algorithms?</p>