options for using OpenGLES (not functional yet)

CMakeLists.txt

@@ -8,12 +8,23 @@ OPTION(USE_PCH "Use precompiled header" ON)
 OPTION(NO_CONSOLE "Disable console window on Windows" OFF)
 OPTION(HANDLE_EXCEPTIONS "Generate crash reports" OFF)
 OPTION(FORBIDDEN_FUNCTIONS "Enable forbidden lua functions" ON)
+OPTION(USE_GLES "Use OpenGLES (for mobiles devices)" OFF)
 
 # find needed packages
 SET(Boost_USE_STATIC_LIBS ON)
 SET(Boost_USE_MULTITHREADED OFF)
 FIND_PACKAGE(Boost COMPONENTS system REQUIRED)
-FIND_PACKAGE(OpenGL REQUIRED)
+
+IF(USE_GLES)
+    FIND_PACKAGE(OpenGLES REQUIRED)
+    FIND_PACKAGE(EGL REQUIRED)
+    SET(OPENGL_INCLUDE_DIR ${OPENGLES_INCLUDE_DIR} ${EGL_INCLUDE_DIR})
+    SET(OPENGL_LIBRARIES ${OPENGLES_LIBRARY} ${EGL_LIBRARY})
+    ADD_DEFINITIONS(-DGLES -DEGL)
+ELSE(USE_GLES)
+    FIND_PACKAGE(OpenGL REQUIRED)
+ENDIF(USE_GLES)
+
 FIND_PACKAGE(Lua REQUIRED)
 FIND_PACKAGE(PhysFS REQUIRED)
 FIND_PACKAGE(GMP REQUIRED)

cmake/FindEGL.cmake

@@ -0,0 +1,10 @@
+# Try to find the EGL librairy
+#  EGL_FOUND - system has EGL
+#  EGL_INCLUDE_DIR - the EGL include directory
+#  EGL_LIBRARY - the EGL library
+
+FIND_PATH(EGL_INCLUDE_DIR egl.h PATH_SUFFIXES EGL)
+FIND_LIBRARY(EGL_LIBRARY NAMES EGL)
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(EGL DEFAULT_MSG EGL_LIBRARY EGL_INCLUDE_DIR)
+MARK_AS_ADVANCED(EGL_LIBRARY EGL_INCLUDE_DIR)

cmake/FindOpenGLES.cmake

@@ -0,0 +1,10 @@
+# Try to find the OpenGLES librairy
+#  OPENGLES_FOUND - system has OpenGLES
+#  OPENGLES_INCLUDE_DIR - the OpenGLES include directory
+#  OPENGLES_LIBRARY - the OpenGLES library
+
+FIND_PATH(OPENGLES_INCLUDE_DIR gl2.h PATH_SUFFIXES GLES2)
+FIND_LIBRARY(OPENGLES_LIBRARY NAMES GLESv2)
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenGLES DEFAULT_MSG OPENGLES_LIBRARY OPENGLES_INCLUDE_DIR)
+MARK_AS_ADVANCED(OPENGLES_LIBRARY OPENGLES_INCLUDE_DIR)