Welcome, Guest. Please login or register. Did you miss your activation email?

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Jaberwocky

Pages: [1]
1
Hello everyone,

I encounter a weird problem when using two RenderWindows in different threads.
I'm not sure how to explain it correctly, so I will go throw it step by step.

When I boot my application a DLL (Prototari.dll) will be loaded, which is using the SFML 2.5.1 - it creates a window and loads a texture to use - but it does not render yet!

After this a second DLL (SplashScreen.dll) is loaded which will also use the SFML 2.5.1. to display a SplashScreen. While the Prototari-RenderWindow was created by the MainThread, the SplashScreen-RenderWindow will be created in a new Thread. Then, the SplashScreen-RenderWindow will run its event loop and render an image for like 2 seconds. Then the window will be closed, the thread will terminated and the SplashScreen.dll gets unloaded.

NOW the Prototari-RenderWindow starts rendering. After hitting "Enter" a new thread will load Textures, but this will fail with the message "Failed to activate OpenGL context" because the "handle is invalid".

When I dont execute the SplashScreen, everything will work. If I keep the SplashScreen active while the Prototari Window starts rendering, it will crash.



I then created a new DLL which will just open a RenderWindow (instead of using Prototari) and then close it after the SplashScreen is done.
Now I will get this message when the destructor of the RenderWindow was called.

So.... What might be the problem?

Edit: Turns out I mistook the order or the different RenderWindows. The SplashScreen-RenderWindow will be the first one, then the Prototari-RenderWindow is created.


Solution:

So.... I tried something different now, since the order for the 2 RenderWindows was:
1.) Creation in Non-MainThread
2.) Creation in MainThread

I decided to swap the order - now it is working! Yeah!

But I wonder: Why? Is it important that the first RenderWindow was created by the MainThread?

Pages: [1]
anything