title: Deprecated OpenGL features
body: <p>I recently read <a href="http://www.opengl.org/wiki/History_of_OpenGL#Deprecation_Model" rel="nofollow">this</a> list and I noticed that almost everything I studied from the OpenGL Red Book is considered deprecated.
  I'm talking about pixel transfer operations, pixel drawings, accumulation buffer, Begin/End functions (!?), automatic mipmap generation and current raster position.</p>
  
  <p>Why did they flag these features as deprecated? Will it be okay to still use them? What are the workarounds?</p>