GLFW unable to get OpenGL 4.1 context on Mavericks - c++

Question

I am trying to get an OpenGL context above version 2 on mac using GLFW. My configuration is Mavericks (10.9.1) + XCode and I have an Nvidia Geforce 650M GPU with OpenGL 4.1 Full Profile potentially supported. I use the following code:
static void test_error_cb (int error, const char *description)
{
fprintf(stderr, "%d: %s\n", error, description);
}
int main(void)
{
GLFWwindow* window;
glfwSetErrorCallback(test_error_cb);
// Initialise GLFW
if (!glfwInit())
{
fprintf(stderr, "Failed to initialize GLFW\n");
exit(EXIT_FAILURE);
}
//Request Specific Version
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
// Open OpenGL window
window = glfwCreateWindow(500, 500, "Split view demo", NULL, NULL);
if (!window)
{
fprintf(stderr, "Failed to open GLFW window\n");
glfwTerminate();
exit(EXIT_FAILURE);
}
// Set callback functions
glfwSetFramebufferSizeCallback(window, framebufferSizeFun);
glfwSetWindowRefreshCallback(window, windowRefreshFun);
glfwSetCursorPosCallback(window, cursorPosFun);
glfwSetMouseButtonCallback(window, mouseButtonFun);
glfwSetKeyCallback(window, key_callback);
// Enable vsync
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
glfwGetFramebufferSize(window, &width, &height);
framebufferSizeFun(window, width, height);
//Check Version
int major, minor, rev;
major = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MAJOR);
minor = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MINOR);
rev = glfwGetWindowAttrib(window, GLFW_CONTEXT_REVISION);
printf("OpenGL version recieved: %d.%d.%d\n", major, minor, rev);
printf("Supported OpenGL is %s\n", (const char*)glGetString(GL_VERSION));
printf("Supported GLSL is %s\n", (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION));
// Main loop
for (;;)
{
// Only redraw if we need to
if (do_redraw)
{
// Draw all views
drawAllViews();
// Swap buffers
glfwSwapBuffers(window);
do_redraw = 0;
}
// Wait for new events
glfwWaitEvents();
// Check if the window should be closed
if (glfwWindowShouldClose(window))
break;
}
// Close OpenGL window and terminate GLFW
glfwTerminate();
exit(EXIT_SUCCESS);
}
Currently glfwCreateWindow function fails. Without any hints (i.e. no glfwWindowHint calls) I can only have OpenGL 2.1 with glsl version at 1.20. Advise.

Answer 1

A Core context is required to access GL versions greater than 2.1 on OSX.
Uncomment your GLFW_OPENGL_PROFILE hint.

Answer 2

Try adding this before your #include <GLFW/glfw3.h> and uncomment your profile hint.
#define GLFW_INCLUDE_GLCOREARB

Answer 3

Not sure why you're disabling the core profile hint. I don't have an answer, but you might get some more information via the error callback, e.g.,
extern "C"
{
static void test_error_cb (int error, const char *description)
{
fprintf(stderr, "%d: %s\n", error, description);
}
}
...
{
glfwSetErrorCallback(test_error_cb);
if (glfwInit() != GL_TRUE)
{
....
This is a function that can be used prior to glfwInit.