#include <GL/glx.h>
#include <stdio.h>
//for assert
#include <assert.h>
int main()
{
	GLXContext glxContext = NULL, glxCopyContext = NULL;
    
    Display* display = XOpenDisplay(NULL);
	assert(display != NULL);

    int attribs[] = {
        GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
        GLX_DOUBLEBUFFER, True,
        GLX_RENDER_TYPE, GLX_RGBA_BIT,
        GLX_RED_SIZE, 1,
        GLX_GREEN_SIZE, 1,
        GLX_BLUE_SIZE, 1,
        None};
    int nelems;
    GLXFBConfig* configs = glXChooseFBConfig(display,
        DefaultScreen(display), attribs, &nelems);
    assert(configs != NULL && nelems != 0);
    GLXFBConfig config = configs[0];
    XFree(configs);

    glxContext = glXCreateNewContext(display, config, GLX_RGBA_TYPE, NULL, False);
	assert(glxContext != 0);

    glxCopyContext = glXCreateNewContext(display, config, GLX_RGBA_TYPE, NULL, False);
	assert(glxCopyContext != 0);

    
    glXCopyContext(display, glxContext, glxCopyContext, GL_ALL_ATTRIB_BITS);
	printf("Test finished.\n");
	//cleanup
	if(display)
    {
        if(glxContext) glXDestroyContext(display, glxContext);
        if(glxCopyContext) glXDestroyContext(display, glxCopyContext);
        XCloseDisplay(display);
    }
	return 0;
}