glfwCreateWindow() does not work after setting win

问题:

I'm following a tutorial which uses glfwWindowHint() to set the version of GLFW that he is using. He's on OSX and I'm on Windows. I have the exact same code as his. When I do this:

glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_COMPAT_PROFILE);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);

And then this:

GLFWwindow* window = glfwCreateWindow(640, 360, "Modern OpenGL", NULL, NULL);

It always returns NULL. But in the tutorial he said that setting the window hints was necessary to use the code that the program uses. When I take out the window hints the window is created sucessfully, but then it crashes (because of the other code that probably required the window hint changes).

I'm on Windows XP. How do I fix this?

回答1:

Interestingly, this code should always return NULL on OSX, as OSX supports OpenGL >=3 only in core profiles, while this code requests a compatibility profile.

On Windows, a compatibility profile of that version might be supported. But this will depend on the GPU and the drivers you have installed. It might very well be the case that your system does simply not support GL3.2. Make sure you are using recent drivers. And check what GL version your GPU actually supports. One thing you could try though is setting the GLFW_OPENGL_FORWARD_COMPAT hint to GL_FALSE.