hi, hardcore coders,
I think this is more a SDL question rather than a OpenGL one.

I'm aware SDL doc says "Don't use any library functions in separate threads".
But I don't see any other way to do this :


bool loading;

void loading_message ( void* data) {
float x=0;
while (loading) {
// do some drawing with opengl
// for example : draw a message moving from left to right
glBindTexture ( texture_WeAreLoading_PleaseWait );
glBegin ();
glVertex3f ( x, ... )
...
glEnd ();
x += 0.1;
if (x>100) x=0;
}
}


main
{
loading = true;

SDL_CreateThread ( loading_message , NULL );

// meanwhile I do the loading

bla bla bla
// but in order to create some textures I need to use opengl functions like
glGenTextures(1, &a_new_texture);
glBindTexture(GL_TEXTURE_2D, a_new_texture);
glTexImage2D(GL_TEXTURE_2D, 0, pixelSize, width, height, 0, format, GL_UNSIGNED_BYTE, pixel);

// tell the thread to exit because it's done
loading = false;
}

What's the solution ?
I saw some PlayStation load part of a game whie displaying animation, but i can't remember a PC game doing this.
That's why I'm wondering is there even a solution ?

Ryan Clark :

No it didn't help much but thanks for taking time to answer.

Plus, I played bounce !



teamonkey :

I'm going deeper with mutex ( never used this before )



I forgot to say that I tried the two opposite ways ( display in the main and load in the thread, and load in the main and display in the thread ). Each time some textures seemed to be freed ( they were all white ) and/or I had a strange message I had never seen before involving the name of my video card ( "bla bla bla radeon bla bla bla" ).

This message made me put an end to my random guessing with threads :

Don't mess with the driver, ask for help instead !