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[Caml-list] writing images with lablgl
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Date: -- (:)
From: Damien <Damien.Pous@e...>
Subject: Re: [Caml-list] writing images with lablgl
> You can use glReadPixels and glReadBuffer save BACK image from OpenGL
> to memory. Converting pixel data to image format is your task. 

I have done it for PPM : 

  let save_ppm s = 
    let o = open_out s in
    let w = Glut.get Glut.WINDOW_WIDTH  in
    let h = Glut.get Glut.WINDOW_HEIGHT in
      Printf.fprintf o "P6\n%d %d\n%d\n" w h 255;
      let w3 = 3*w in
      let r = GlPix.to_raw (GlPix.read 0 0 w (3*h) `rgb `ubyte) in
	for j = h-1 downto 0 do
	  output_string o (Raw.gets_string r (w3*j) w3)
	done;
	close_out o

why not to include this kind of boring function into lablgl(ut) ?
(or at least somewhere in the examples...)

damien

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