Some issues with DisplaySystem

Troubleshooting General Help
1

have a few issues where I cant create a window or I get weird results if I do. I have moved the display options from the default dialog to an ingame menu so I can change options ingame instead of only before the game



card: radeon 9800pro, latest ati drivers, jme from cvs



substituted eight for 8 so its not a smiley  :slight_smile:



first case in windowsXP: if I use display.setMinAlphaBits(eight); my alpha images look right but if I try to create a window in fullscreen mode with 16bpp color I get error below. if I remove setMinAlphaBits it runs but it looks terrible.

May 20, 2007 9:37:37 PM com.jme.system.lwjgl.LWJGLDisplaySystem initDisplay
SEVERE: Cannot create window
com.jme.system.JmeException: Cannot create window: Could not find a valid pixel format
   at com.jme.system.lwjgl.LWJGLDisplaySystem.initDisplay(LWJGLDisplaySystem.java:421)
   at com.jme.system.lwjgl.LWJGLDisplaySystem.createWindow(LWJGLDisplaySystem.java:141)
   at com.XMDGames.main.MainBowlingGame.initSystem(MainBowlingGame.java:45)
   at com.XMDGames.main.MainBowlingGame.start(MainBowlingGame.java:85)
   at com.XMDGames.main.MainBowlingGame.main(MainBowlingGame.java:192)



issue2 in WindowsXP in TestRecreateWindow if I start app with 640x480 16bpp window creates fine but if I switch to fullscreen I get this:



issue3: in Linux, I get slower fps when recreating a window. for example if I switch from 640x480 windowed to 1280x1024 fullscreen itll run at 35 fps but if I close game and run again itll run at 45fps 1280x1024 fullscreen.

I tried closing the display and creating a new one (instead of recreate) but it just comes up a black window  :? not sure where to go from here , these are just some of the issuses and all in all Im getting very unpredictable results changing the resolution ingame, sometimes I do the same thing and get different results. Im thinking I may have to require a game restart for resolution changes and no 16bpp for windows users  :(
2

Lucky boy, in my case restarting the game in Linux causes a native crash, recreating a window causes:



INFO [sims.limbsim.project.LimbSimProjectFactory]: Recreating display:

SCHWERWIEGEND [jme]: Cannot recreate window

SCHWERWIEGEND [jme]: Main game loop broken by uncaught exception

java.lang.Error: Cannot recreate window: X Error - serial: 16945, error_code: BadWindow (invalid Window parameter), request_code: 20, minor_code: 0

        at com.jme.system.lwjgl.LWJGLDisplaySystem.reinitDisplay(Unknown Source)

        at com.jme.system.lwjgl.LWJGLDisplaySystem.recreateWindow(Unknown Source)

        at com.jmex.game.StandardGame.reinit(Unknown Source)

        at com.jmex.game.StandardGame$1.call(Unknown Source)

        at com.jme.util.GameTask.invoke(Unknown Source)

        at com.jme.util.GameTaskQueue.execute(Unknown Source)

        at com.jmex.game.StandardGame.update(Unknown Source)

        at com.jmex.game.StandardGame.run(Unknown Source)

[catch] at java.lang.Thread.run(Thread.java:619)

INFO [jme]: Child removed.



…which is followed by a JVM crash the next time one tries to open the window. Restarting and recreating seems to be quite fragile (probably depending on the graphics chip?).

3
Restarting and recreating seems to be quite fragile


i agree, in my game I decided to take out the option to change the resolution ingame.
4

Out of interest, what startiing settings have you fixed ??