eglGetProcAddress returns NULL for GLES functions, while those functions are actually callable

[KAAAsS]

Hi, I'm trying to port a game using PVR_PSP2, which loads GL functions dynamically but found eglGetProcAddress didn't return right address. The situation is:

init_pvr_psp2();
init_egl();
auto addr = reinterpret_cast<uint32_t>(eglGetProcAddress("glGetError"));
log("glGetError addr = %x, error = %x\n", addr, eglGetError());
// prints: glGetError addr = 0, error = 3000
log("glGetError = %d\n", glGetError());
// prints: glGetError = 0, might indicate that GLES module are loaded
addr = reinterpret_cast<uint32_t>(eglGetProcAddress("glGetError"));
log("glGetError addr = %x, error = %x\n", addr, eglGetError());
// prints: glGetError addr = 0, error = 3000

The complete test code can be found here. Additionally, loading libGLESv1_CM.suprx manually in init_pvr_psp2 would solve this problem. But I thought this might not be the correct way to use it. Anyway, thanks for developing this excellent repo! Any help will be appreciated.

[Epifanov Ivan]

You are using gles2 context. Why are you trying to load gles1 module?

[Epifanov Ivan]

Moreover, if you intend to use sdl2, like your code suggests - why not use sdl context creation funcs?

[KAAAsS]

You are using gles2 context. Why are you trying to load gles1 module?

I had tried to load libGLESv2.suprx manually, but it crashed. Also, yes, loading libGLESv1_CM.suprx did make eglGetProcAddress return a non-null value, but those functions didn't seem to work correctly.

Moreover, if you intend to use sdl2, like your code suggests - why not use sdl context creation funcs?

Actually, this is how I found this issue. Take my SDL2 + gl4es4vita code as an example. When I comment this line to let SDL2 handles context creation stuff, the program crashed during OpenGL calls. I tried to recompile gl4es4vita in debug profile and found it complains that glGetError is NULL here during SDL_GL_CreateContext. So I extracted several vital codes and managed to reproduce this.

I guess I did sth wrong while setting up the lib (SDL2 + gl4es4vita + PVR_PSP2 combo). But for the use case metioned in this issue, NULL return of eglGetProcAddress makes no sense to me (or maybe I miss sth in initialization?).

[Epifanov Ivan]

You have both gles1 and gles2 suprx-es. That leads to conflict. Leave only the one you're using

[KAAAsS]

That solves all the problems, thanks for your help!!