The window whose callback to set.
The new callback, or null to remove the currently set callback.
The previously set callback, or null if no callback was set or the library had not been initialized.
@callback_signature
void function_name(GLFWwindow* window, int width, int height)
For more information about the callback parameters, see the function pointer type.
Errors: Possible errors include @ref GLFW_NOT_INITIALIZED.
This function must only be called from the main thread.
@sa @ref window_size
Added in version 1.0. @glfw3 Added window handle parameter and return value.
Ingroup: window
Sets the size callback for the specified window.
This function sets the size callback of the specified window, which is called when the window is resized. The callback is provided with the size, in screen coordinates, of the content area of the window.