title: per pixel drawing in OpenGL
body: <p>I used to write small games with 'per pixel' drawing, 
  I mean with some SetPixel(x,y,color) function or such.</p>
  
  <p>I am also interested in OpenGL but do not know it much.</p>
  
  <p>Is it a good (fast) way to do a per pixel drawing in OpenGL ?</p>
  
  <p>It would be good for example to use textured quads as a sprites,
  or whole application background screen, with possibility to 
  set distinct pixel with some kind of my own SetPixel routine
  i would write... or any other way - but it should be efficient
  as much as it cans</p>
  
  <p>(especialy im interested in basic fundamenta 1.0 version of OGL)</p>