diff --git a/src/video/video_driver.hpp b/src/video/video_driver.hpp
--- a/src/video/video_driver.hpp
+++ b/src/video/video_driver.hpp
@@ -15,20 +15,47 @@
 #include "../driver.h"
 #include "../core/geometry_type.hpp"
 
+/** The base of all video drivers. */
 class VideoDriver: public Driver {
 public:
+	/**
+	 * Mark a particular area dirty.
+	 * @param left   The left most line of the dirty area.
+	 * @param top    The top most line of the dirty area.
+	 * @param width  The width of the dirty area.
+	 * @param height The height of the dirty area.
+	 */
 	virtual void MakeDirty(int left, int top, int width, int height) = 0;
 
+	/**
+	 * Perform the actual drawing.
+	 */
 	virtual void MainLoop() = 0;
 
+	/**
+	 * Change the resolution of the window.
+	 * @param w The new width.
+	 * @param h The new height.
+	 * @return True if the change succeeded.
+	 */
 	virtual bool ChangeResolution(int w, int h) = 0;
 
+	/**
+	 * Change the full screen setting.
+	 * @param fullscreen The new setting.
+	 * @return True if the change succeeded.
+	 */
 	virtual bool ToggleFullscreen(bool fullscreen) = 0;
 };
 
+/** Base of the factory for the video drivers. */
 class VideoDriverFactoryBase: public DriverFactoryBase {
 };
 
+/**
+ * Factory for the video drivers.
+ * @tparam T The type of the video factory to register.
+ */
 template <class T>
 class VideoDriverFactory: public VideoDriverFactoryBase {
 public: