set_colour_adjustment-related improvements

src/image.cpp

@@ -557,6 +557,21 @@ void set_colour_adjustment(int r, int g, int b)
 	}
 }
 
+boost::tuple<int, int, int> get_colour_adjustment()
+{
+	return boost::make_tuple(red_adjust, green_adjust, blue_adjust);
+}
+
+colour_adjustment_resetter::colour_adjustment_resetter()
+: r_(red_adjust), g_(green_adjust), b_(blue_adjust)
+{
+}
+
+void colour_adjustment_resetter::reset()
+{
+	set_colour_adjustment(r_, g_, b_);
+}
+
 void set_team_colors(const std::vector<std::string>* colors)
 {
 	if (colors == NULL)

src/image.hpp

@@ -24,6 +24,8 @@
 #include <vector>
 #include <list>
 
+#include <boost/tuple/tuple.hpp>
+
 ///this module manages the cache of images. With an image name, you can get
 ///the surface corresponding to that image.
 //
@@ -197,6 +199,17 @@ namespace image {
 	///their pixels. i.e. add a certain colour hint to images. useful
 	///for representing day/night. Invalidates all scaled images.
 	void set_colour_adjustment(int r, int g, int b);
+	
+	boost::tuple<int, int, int> get_colour_adjustment();
+	
+	class colour_adjustment_resetter
+	{
+		public:
+			colour_adjustment_resetter();
+			void reset();
+		private:
+			int r_, g_, b_;
+	};
 
 	///set the team colors used by the TC image modification
 	///use a vector with one string for each team