Hi all,
I’m trying to mix SDL rendering with openGL using custom shaders.
I got everything up and running, but looks like setting my custom program affects SDL and corrupts its internal state or something like that.
For example, stuff I render with SDL after my shader program appear upside down. Sometimes with wrong blending mode.
I set my program with:
glUseProgram(myProg);
I tried restoring the previous SDL program by querying the program before setting mine, using
glGetIntegerv(GL_CURRENT_PROGRAM, &_defaultProgram);
and then
glUseProgram(_defaultProgram);
when I’m done, but it didn’t help. I also tried setting null.
In all examples I found of SDL + shaders they also flip the backbuffer manually right after using their shader, but I want to mix SDL and custom shaders in the same frame without rendering to texture and without forcing the openGL rendering to go last, so its not suitable.
Is there a way to tell SDL to ‘reset’ its internal states or whatever needed to make it recover after I changed the program?
Thanks,