[rcore] Use FLAG_* macros where possible

[JohnnyCena123]

No description provided.

[raysan5]

@JohnnyCena123 I've been thinking about this update and I'm merging it but I'm concerned about the macro FLAG_CHECK(), I think it's not clear enough and when implemented it could lead to confusions. I think it could be replaced by FLAG_IS_SET() macro, checking directly if the requested flag is set (or not).

So, code needs to be updated from:

if (FLAG_CHECK(CORE.Window.flags, FLAG_WINDOW_MINIMIZED) > 0) { }

to

if (FLAG_IS_SET(CORE.Window.flags, FLAG_WINDOW_MINIMIZED)) { }

or depending the case

if (!FLAG_IS_SET(CORE.Window.flags, FLAG_WINDOW_MINIMIZED)) { }

Please, could you review it?

[raysan5]

@JohnnyCena123 Did you see my previous message? I can implement it if you can't.

[JohnnyCena123]

@JohnnyCena123 Did you saw my previous message? I can implement it if you can't.

sorry, I must've missed it. I will do that tomorrow if I remember

[JohnnyCena123]

@raysan5 i remembered!

[raysan5]

@JohnnyCena123 Added some code reviews. Did you test the changes? There is a windows_config_flags example to test some of them...

[raysan5]

@JohnnyCena123 Added some point to review, did you check them?

[orcmid]

These changes are excessive and impose extensive challenges on reviewers. Also, it is not clear how any of these are related to the subject of the #5169.

Break it into smaller changes all with specific stated purposes.

[raysan5]

@orcmid Agree, this is a big change that could potentially break things, this time I'm merging it and reviewing myself carefully but definitely the last time I'm accepting this kinf of PR. Hopefully everything will be ok and hopefully contributor tested everu¡ything works as expected...

@JohnnyCena123 Thanks for the reeview, I'm merging it.

[JeffM2501]

This PR breaks IsWindowFocused in GLFW.
The inital focus state is correct, but after that the state will be inverted.
This video shows the problem.
I did A/B testing and found that this PR is the culprit.

This PR makes rlImGui non functional in head. It should be fixed or reverted.

Recording.2025-11-03.113813.mp4