Allow to run xrandr instead of vidmode as an option

CMakeLists.txt

@@ -17,6 +17,7 @@ option(CHECK_ASSETS "Check if assets are installed in ../stk-assets" ON)
 
 if(UNIX)
     option(USE_CPP2011 "Activate C++ 2011 mode (GCC only)" OFF)
+    option(USE_XRANDR "Use xrandr instead of vidmode" OFF)
 endif()
 if(MSVC)
     # Normally hide the option to build wiiuse on VS, since it depends
@@ -117,6 +118,11 @@ if(USE_FRIBIDI)
     endif()
 endif()
 
+# Xrandr
+if(UNIX AND USE_XRANDR)
+    find_package(Xrandr REQUIRED)
+endif()
+
 if(UNIX)
     if(USE_CPP2011)
         add_definitions("-std=c++0x")
@@ -278,6 +284,11 @@ if(USE_WIIUSE)
 
 endif()
 
+# Xrandr
+if(UNIX AND USE_XRANDR)
+    target_link_libraries(supertuxkart ${XRANDR_LIBRARIES})
+endif()
+
 if(MSVC)
   target_link_libraries(supertuxkart iphlpapi.lib)
   add_custom_command(TARGET supertuxkart POST_BUILD

cmake/FindXrandr.cmake

@@ -0,0 +1,18 @@
+find_path(XRANDR_INCLUDE_DIR NAMES X11/extensions/Xrandr.h
+          PATH_SUFFIXES X11/extensions
+          DOC "The XRANDR include directory"
+)
+
+find_library(XRANDR_LIBRARY NAMES Xrandr
+          DOC "The XRANDR library"
+)
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(XRANDR DEFAULT_MSG XRANDR_LIBRARY XRANDR_INCLUDE_DIR)
+
+if(XRANDR_FOUND)
+  set( XRANDR_LIBRARIES ${XRANDR_LIBRARY} )
+  set( XRANDR_INCLUDE_DIRS ${XRANDR_INCLUDE_DIR} )
+endif()
+
+mark_as_advanced(XRANDR_INCLUDE_DIR XRANDR_LIBRARY)

lib/irrlicht/CMakeLists.txt

@@ -21,6 +21,12 @@ else()
   set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -Wall -pipe -O3  -fno-exceptions  -fstrict-aliasing -fexpensive-optimizations -I/usr/X11R6/include")
 endif()
 
+# Xrandr
+if(UNIX AND USE_XRANDR)
+    add_definitions(-DNO_IRR_LINUX_X11_VIDMODE_)
+    add_definitions(-D_IRR_LINUX_X11_RANDR_)
+endif()
+
 set(IRRLICHT_SOURCES
 source/Irrlicht/CTRStencilShadow.cpp
 source/Irrlicht/CGUIListBox.cpp