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CLOSED  Bug report #176  -  OpenGL - low FPS
Posted Oct 25, 2015 - updated Sep 18, 2017
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icon_info.png This issue has been closed with status "Closed" and resolution "WON'T FIX".
Issue details
  • Type of issue
    Bug report
  • Status
     
    Closed
  • Assigned to
    Not assigned to anyone
  • Progress
       
  • Type of bug
    Not triaged
  • Likelihood
    Not triaged
  • Effect
    Not triaged
  • Posted by
     Bren
  • Owned by
    Not owned by anyone
  • Estimated time
    Not estimated
  • Time spent
    No time spent
  • Category
    Not determined
  • Resolution
    WON'T FIX
  • Priority
    Not determined
  • Reproducability
    Not determined
  • Severity
    Not determined
  • Targetted for
    icon_milestones.png Not determined
Issue description
In higher resolutions, like 1680x1050, I'm experiencing low FPS (below 20). In 1200x1080, problem isn't such bad (30-40). In DirectDraw, I don't have such issues (FPS much above 100). Windows 7x64, AMD Radeon HD 6800, Intel Core 2 Duo.
Steps to reproduce this issue
Turn higher resolution and OpenGL on.

#1
Comment posted by
 Stucuk
Oct 26, 14:39
Just in the menus, in the main game? If its just in the menus then turning off Single Resolution may fix it (Geforce 5's don't like PBuffers, though they are old cards). What version are you using?
#2
Comment posted by
 Bren
icon_reply.pngOct 26, 16:31, in reply to comment #1


Stucuk wrote:
Just in the menus, in the main game? If its just in the menus then turning
off Single Resolution may fix it (Geforce 5's don't like PBuffers, though
they are old cards). What version are you using?
I had a little more time, so I've measured FPS in both versions (DD and OGL) more accurate. In main menu (very low resolution): DD ~400, OGL ~900. In main game(1680x1050): DD ~140, OGL ~30, but drops to ~20 when I'm trying to move across the map. FPS are the same for severall maps and multiplayer games (LAN ones). Version: 2.0.2.31 There is one more issue: OGL takes years to launch comparing to DD (15 seconds to nearly instantly).

#3
Comment posted by
 Stucuk
icon_reply.pngOct 28, 05:19, in reply to comment #2
Something very wrong if your getting that much difference(OGL isn't actually doing the main game rendering, thats still done on your CPU and then sent to the graphics card as a texture). Have you tried updating your cards drivers? Also could you use This System Information tool (Which i made) and list what it sais about your system?

OpenGL shouldn't add any time to the loading. When testing they both take the same amount of time on my pc. Direct Draw will always give more FPS because of how its implemented(It only draws stuff when something has changed, OpenGL re-draws the menu each frame). but you should get at least 60FPS with OpenGL in-game.