Improve diagnostics on GLFW failure

diff --git a/src/client/window.c b/src/client/window.c
index f335ed2d7bb70ee29cc7803685a30354cf47c0e6..ce053daa8b4077f05c607c84fd31b820473b51ff 100644 (file)
--- a/src/client/window.c
+++ b/src/client/window.c
@@ -56,6 +56,11 @@ static void mouse_button_callback(__attribute__((unused)) GLFWwindow *handle, in
                input_click(button == GLFW_MOUSE_BUTTON_LEFT);
 }
 
+static void error_callback(__attribute__((unused)) int error, const char *description)
+{
+       fprintf(stderr, "[warning] GLFW error: %s\n", description);
+}
+
 void window_enter_fullscreen()
 {
        window.fullscreen = true;
@@ -81,6 +86,8 @@ void window_init()
                abort();
        }
 
+       glfwSetErrorCallback(&error_callback);
+
        glfwWindowHint(GLFW_SAMPLES, client_config.antialiasing);
        glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
        glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
@@ -97,7 +104,7 @@ void window_init()
        small_height = window.height;
 
        if (!window.handle) {
-               fprintf(stderr, "[error] failed to create window\n");
+               fprintf(stderr, "[error] failed to create window (does your machine support OpenGL 3.3?)\n");
                glfwTerminate();
                abort();
        }