Fullscreen games show only 1/4 of screen...

Discussion in 'MacBook Pro' started by Ploki, Feb 10, 2013.

  1. Ploki, Feb 10, 2013
    Last edited: Feb 10, 2013

    Ploki macrumors 68020

    Jan 21, 2008
    Why, when I try to run games, only the quarter of screen is shown?

    I.e. ioquake3 set at 2880*1800 will startup in quarter screen with four pixels on screen taking up 1 logical pixel... If i do change within the app, it shows up correctly.
    Galaxy on Fire 2 HD at fullscreen 2880*1800 shows up the same - 1/4 of screen in shown magnified by 2

    IS there any way to tell the damn graphic card to scale properly?
  2. leman macrumors G3

    Oct 14, 2008
    Well, by default OS X in HiDPI mode will upscale OpenGL views (the same way it does with images). This is done to improve performance in most applications. So I imagine that if the application requests a 2880*1800 window, the OS X gives it a 2880*1800 'logical' window if it is not coded in a proper way. I haven't actually played with that yet, so I can't tell anything more specific, but I suspect that there are some unpolished edges in the API that sometimes can lead to weird results. Or - the game is coded badly (for instance, it might query the OS for the actual hardware pixel resolution but not take pixel backing store into account).

    See also http://developer.apple.com/library/...html#//apple_ref/doc/uid/TP40012302-CH10-SW33
  3. Ploki thread starter macrumors 68020

    Jan 21, 2008
    Yeah, that's why I tried to run it native at 2880*1800, but the same phenomena occurs. I don't quite get it...
    Even if I run OS X at native res and snap a screenshot of fullscreen app, it just doesn't work.

    Windowed mode at native res does work normal though.
  4. Ploki thread starter macrumors 68020

    Jan 21, 2008
    So stupid. You just need to turn off automatic GFX switching... silly.. :)

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