I have the following code:
void error_callback(int error, const char* description)
{
fputs(description, stderr);
}
int main( void )
{
// Initialise GLFW
if( !glfwInit() )
{
fprintf( stderr, "Failed to initialize GLFW\n" );
return -1;
}
glfwWindowHint(GLFW_SAMPLES, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
//glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
// Open a window and create its OpenGL context
glfwSetErrorCallback(error_callback);
window = glfwCreateWindow( 1024, 768, "Tutorial 16 - Shadows", NULL, NULL);
if( window == NULL ){
//fprintf( stderr, "Failed to open GLFW window. If you have an Intel GPU, they are not 3.3 compatible. Try the 2.1 version of the tutorials.\n" );
glfwTerminate();
return -1;
}
glfwMakeContextCurrent(window);
// Initialize GLEW
GLenum err;
glewExperimental = GL_TRUE; // Needed for core profile
if ((err = glewInit()) != GLEW_OK) {
std::cout << glewGetErrorString(err) << std::endl;
return -1;
}
...
}
The problem is that I'm receiving the following message: https://github.com/glfw/glfw/blob/master/src/nsgl_context.m#L101
And, indeed, GLFW won't give me a OpenGL 3+ context without setting the forward-compatibility flag (in Mac OS X).
Why is that? Is there any way to get a OpenGL 3+ context in Mac OS X 10.9 without forward-compatibility? Is it a limitation of OpenGL implementation for OS X or a problem of GLFW?