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Graphics / OpenGL on Yosemite produces flashing screen

« on: July 22, 2018, 12:29:48 am »

Hello,
I'm trying to set up a SFML project with some OpenGL elements drawn over. I've tried following examples I've found online, but they either produce a black screen or a screen such as the one i've attached. Here is the code I'm currently using:

initialization:

    videomode =sf::VideoMode::getFullscreenModes()[resolution];
    sf::ContextSettings settings;
    settings.majorVersion = 2;
    settings.minorVersion = 1;
   
    window.create(videomode,"Opengl",fullscreen?sf::Style::Fullscreen:sf::Style::Default,settings);
    window.setFramerateLimit(60);
    sf::Image icon;
    if (!icon.loadFromFile(resourcePath() + "icon.png")) throw;
    window.setIcon(icon.getSize().x, icon.getSize().y, icon.getPixelsPtr());
    if (!starfont.loadFromFile(resourcePath() + "sansation.ttf")) throw;
    window.setVerticalSyncEnabled(true);
    glEnable(GL_TEXTURE_2D);
    glewExperimental = GL_TRUE;
    glewInit();
    glViewport(0, 0, videomode.width, videomode.height);
    window.setActive(true);
    glClearDepth(1.f);
    glClearColor(0.3f, 0.3f, 1.f, 1.f);
    glEnable(GL_DEPTH_TEST);
    glDepthMask(GL_TRUE);
 

Main loop:

    go->window.setActive(true);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    checkError();
 

My checkError() function calls glGetError() and prints the error if there is one.

Has anyone run into a similar problem?

EDIT: The code I put here originally wasn't a minimal example, so here's a more minimal example without any vbos or anything. I'm just aiming for a window with a solid fill color, but this gives me a window that flashes between my fill color and the glitchy screen.