CODEWITHSUNDEEP
opengllwjgl
pdid
pdid

Reputation: 347

How to tell when an OpenGL context is changed

When using opengl through lwjgl, when an opengl context is made unavailable by making no context current (using glfwMakeContextCurrent(0)), the opengl calls all return 0 as a result. This can lead to unexpected results and it is often hard to see where the problem is. Is there any way of telling when a context is switched using a callback or something, so that a proper error can be filed?

Upvotes: 0

Views: 314

Answers (1)

Sed
Sed

Reputation: 47

As far as I can tell, the lwjgl library uses several different APIs', including GLFW. If you are using the GLFW API to create contexts(or the library is, which it looks like it from their website), then you can request to receive the window that the context is currently bound to using:

glfwGetCurrentContext();

If this returns NULL, it is probably not currently bound to any window. You could implement this function in a glfwPollEvents() style callback(or something similar), and output an error message when it checks the contexts status.

Upvotes: 2

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