Posted by HamudHaa on Feb 07, 2024; 1:12pm
URL: https://forum.jogamp.org/When-rendering-to-framebuffer-that-is-not-the-default-one-there-ll-be-error-GL-INVALID-FRAMEBUFFER-O-tp4043294.html

I designed a constructor function that will run when init method of the implemented GLEventListener is called. Then I have glGetError in display method .
Inside the constructor function I designed , I have glBindFramebuffer which binds a user-defined fbo to GL_FRAMEBUFFER .
The problem is , when my program is launched :
1.If I bind that fbo to GL_FRAMEBUFFER . The glGetError in display will output GL_INVALID_FRAMEBUFFER_OPERATION error .
2.If I bind 0 to GL_FRAMEBUFFER( I guess it means default ?) , then no error
I'm sure the user-defined FBO is okay . Because even if I had it to firstly execute glBindFramebuffer( not the 0 one)  then secondly execute glBindFramebuffer( the 0 one)  there's no error.
So I wonder if you really have to render things into the default frame buffer when the program is initialized