Problems using DX Surfaces draw methods

nick 0

22y2.7kGDI+

Hi I am at the final stages of a game and have just put in the score and a bit of drawing in using a Direct Draw surface and the DrawText and DrawBox methods. All works fine for a while but after a length of time I get the following exception. System.ArgumentNullException: Value cannot be null. at Microsoft.DirectX.DirectDraw.Surface.set_ForeColor(Color value) at BCQuest.GameManager.drawScores(Surface surface) in c:\documents and settings\nick\my documents\visual studio projects\bcquest\gamemanager.cs:line 273 Does anyone know what could be causing this. I can't see why this would happen as the game seems to run for a good 10 minutes before getting upset!!! The surfaces are all ok. Should I be doing a bit of memory management after using the fonts and colors to perfrom this operation?? Yours hopefully Nick James

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nick 022y ago
I've found it.!! surface.FontHandle = new Font("Arial", 12).ToHfont(); For some reason after a period the pointer seems to get corrupt. Even if its creating the font on every loop of the game, after a period of time it still seems to go. Very odd!!! Oh well, i'll just stick to the original font! Nick
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Mykonine22y ago
I've had problems occur before when I tried to draw at a the point (infinity,infinity), and also when I tried to make a new bitmap of size zero.
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nick 022y ago
I've just stripped some of the code out that was causing the initial error and now I'm getting this exception after about the same length of time: An unhandled exception of type 'System.Runtime.InteropServices.ExternalException' occurred in system.drawing.dll Additional information: A generic error occurred in GDI+. Any one got any ideas what could cause this?? Yours stuck Nick
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Mykonine22y ago
I personally don't know exactly what's happening, but I recommend you try adding some stack tracing into the area of the code where you get this problem. That should help you detect the problem, that or maybe a variable dump.
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