MacOS X / Allegro 5.2.3 incorrect OpenGL version

calteran

TL;DR: I'm not getting the correct OpenGL version from Allegro.

On my iMac, using an OpenGL profile viewer, I have the following specs:

#SelectExpand
 1<System>Mac OS X 10.13.4 (17E139j)</System>
 2<Device>iMac16,2</Device>
 3<CPU>2.8 GHz Intel(R) Core(TM) i5-5575R CPU @ 2.80GHz x 4</CPU>
 4<Vendor>Intel Inc.</Vendor>
 5<Version>4.1 INTEL-10.32.28</Version>
 6<GLSLVersion>4.10</GLSLVersion>
 7<Renderer>Intel(R) Iris(TM) Pro Graphics 6200</Renderer>

Relevant code:

#SelectExpand
  al_set_new_display_flags(ALLEGRO_FULLSCREEN_WINDOW | ALLEGRO_OPENGL | ALLEGRO_OPENGL_3_0);
  al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 1, ALLEGRO_SUGGEST);
  al_set_new_display_option(ALLEGRO_SAMPLES, 4, ALLEGRO_SUGGEST);
  al_set_new_display_option(ALLEGRO_OPENGL_MAJOR_VERSION, 4, ALLEGRO_REQUIRE);
  al_set_new_display_option(ALLEGRO_OPENGL_MINOR_VERSION, 1, ALLEGRO_REQUIRE);
  al_set_new_display_refresh_rate(60);
  
  display = al_create_display(screen_width, screen_height);
  if(!display) {
      std::cerr << "failed to create display!" << std::endl;
      return -1;
  }
  
  std::cout << "OpenGL version: " << glGetString(GL_VERSION) << std::endl;

I'm only getting version "2.1 INTEL-10.32.28" instead of 3.0 or 4.1 (either of which would seem correct to me).

I've experimented with both the ALLGRO_FULLSCREEN and ALLEGRO_FULLSCREEN_WINDOW flags as well as including ALLEGRO_OPENGL_FORWARD_COMPATIBLE, neither of which has affected the version of my context. Any ideas?

SiegeLord

Bad news: those flags and settings are ignored, you'll always get OpenGL 2.1.
Good news: maybe I can implement this. I tried today, and got as far as creating OpenGL 4.1 context, but bitmap creation didn't work... presumably you want that working .

calteran

SiegeLord said:

Bad news: those flags and settings are ignored, you'll always get OpenGL 2.1.

Is that documented anywhere? I was under the impression that a display/context wouldn't be created at all if an ALLEGRO_REQUIRE condition failed.

In all honesty, you shouldn't put any special effort into updating the library for me, but I appreciate your willingness to.

Thread #617350. Printed from Allegro.cc