From 0de664d0a886bcda45a0cd05551b6896c5c46ed0 Mon Sep 17 00:00:00 2001
From: Steven Fuller <relnev@icculus.org>
Date: Sat, 14 Feb 2015 12:00:00 +0100
Subject: Import icculus.org release (2015-02-14)

---
 CMakeLists.txt | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 75 insertions(+), 7 deletions(-)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 168f85f..a55d9cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,8 @@ ENDIF(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
 PROJECT(avp)
 
 # required dependencies
+INCLUDE(FindOpenGLES.cmake)
+INCLUDE(FindOpenGLES2.cmake)
 INCLUDE(FindSDL2.cmake)
 INCLUDE(FindSDL)
 INCLUDE(FindOpenGL)
@@ -27,6 +29,18 @@ IF(NOT SDL_TYPE STREQUAL "AUTO" AND NOT SDL_TYPE STREQUAL "SDL" AND NOT SDL_TYPE
     MESSAGE(FATAL_ERROR "Invalid SDL_TYPE setting ${SDL_TYPE}; must be one of AUTO SDL SDL2")
 ENDIF(NOT SDL_TYPE STREQUAL "AUTO" AND NOT SDL_TYPE STREQUAL "SDL" AND NOT SDL_TYPE STREQUAL "SDL2")
 
+IF(SDL_FOUND)
+    IF(SDL_VERSION_STRING VERSION_LESS "1.2.0")
+        MESSAGE(WARNING "SDL 1.2 was claimed to be found with version ${SDL_VERSION_STRING}, ignoring...")
+        UNSET(SDL_FOUND)
+    ENDIF(SDL_VERSION_STRING VERSION_LESS "1.2.0")
+
+    IF(SDL_VERSION_STRING VERSION_GREATER "1.2.99")
+        MESSAGE(WARNING "SDL 1.2 was claimed to be found with version ${SDL_VERSION_STRING}, ignoring...")
+        UNSET(SDL_FOUND)
+    ENDIF(SDL_VERSION_STRING VERSION_GREATER "1.2.99")
+ENDIF(SDL_FOUND)
+
 IF(SDL_TYPE STREQUAL "AUTO")
     IF(SDL_FOUND)
 	MESSAGE(STATUS "SDL 1.2 found; using that.")
@@ -58,12 +72,49 @@ IF(SDL_TYPE STREQUAL "SDL2")
     MESSAGE(WARNING "SDL 2.0 support is EXPERIMENTAL and INCOMPLETE.")
 ENDIF(SDL_TYPE STREQUAL "SDL2")
 
-IF(NOT OPENGL_FOUND)
-    MESSAGE(FATAL_ERROR "OpenGL is required but CMake couldn't find it")
-ENDIF(NOT OPENGL_FOUND)
+# Use Desktop OpenGL if it is available, else try OpenGL ES.
+IF(NOT OPENGL_TYPE)
+    SET(OPENGL_TYPE AUTO CACHE STRING "OpenGL Version; one of: AUTO OPENGL OPENGLES")
+    SET_PROPERTY(CACHE OPENGL_TYPE PROPERTY STRINGS "AUTO" "OPENGL" "OPENGLES")
+ENDIF(NOT OPENGL_TYPE)
+
+IF(NOT OPENGL_TYPE STREQUAL "AUTO" AND NOT OPENGL_TYPE STREQUAL "OPENGL" AND NOT OPENGL_TYPE STREQUAL "OPENGLES")
+    MESSAGE(FATAL_ERROR "Invalid OPENGL_TYPE setting ${OPENGL_TYPE}; must be one of AUTO OPENGL OPENGLES")
+ENDIF(NOT OPENGL_TYPE STREQUAL "AUTO" AND NOT OPENGL_TYPE STREQUAL "OPENGL" AND NOT OPENGL_TYPE STREQUAL "OPENGLES")
+
+IF(OPENGL_TYPE STREQUAL "AUTO")
+  IF(OPENGL_FOUND)
+    MESSAGE(STATUS "OpenGL found; using that.")
+    SET(OPENGL_TYPE "OPENGL")
+  ENDIF(OPENGL_FOUND)
+ENDIF(OPENGL_TYPE STREQUAL "AUTO")
+
+IF(OPENGL_TYPE STREQUAL "AUTO")
+  IF(OPENGLES_FOUND)
+    MESSAGE(STATUS "OpenGL ES found; using that.")
+    SET(OPENGL_TYPE "OPENGLES")
+  ENDIF(OPENGLES_FOUND)
+ENDIF(OPENGL_TYPE STREQUAL "AUTO")
+
+IF(OPENGL_TYPE STREQUAL "AUTO")
+  MESSAGE(FATAL_ERROR "OpenGL is required but CMake couldn't find it.")
+ENDIF(OPENGL_TYPE STREQUAL "AUTO")
 
+IF(OPENGL_TYPE STREQUAL "OPENGL")
+  IF(NOT OPENGL_FOUND)
+    MESAGE(FATAL_ERROR "OpenGL was requested but CMake couldn't find it.")
+  ENDIF(NOT OPENGL_FOUND)
+ENDIF(OPENGL_TYPE STREQUAL "OPENGL")
+
+IF(OPENGL_TYPE STREQUAL "OPENGLES")
+  IF(NOT OPENGLES_FOUND)
+    MESSAGE(FATAL_ERROR "OpenGL ES was requested but CMake couldn't find it.")
+  ENDIF(NOT OPENGLES_FOUND)
+ENDIF(OPENGL_TYPE STREQUAL "OPENGLES")
+
+# OpenAL
 IF(NOT OPENAL_FOUND)
-    MESSAGE(FATAL_ERROR "OpenAL is required but CMake couldn't find it")
+    MESSAGE(FATAL_ERROR "OpenAL is required but CMake couldn't find it.")
 ENDIF(NOT OPENAL_FOUND)
 
 # required source files
@@ -307,7 +358,7 @@ ENDIF(SDL_TYPE STREQUAL "SDL2")
 
 # auto-include directories with source files
 FOREACH(sourcefile IN LISTS source)
-    GET_FILENAME_COMPONENT(includedir ${sourcefile} DIRECTORY)
+    GET_FILENAME_COMPONENT(includedir ${sourcefile} PATH) # newer CMake uses DIRECTORY
     LIST(APPEND include ${includedir})
 ENDFOREACH(sourcefile)
 INCLUDE_DIRECTORIES(${include})
@@ -326,7 +377,16 @@ IF(SDL_TYPE STREQUAL "SDL2")
     INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIR})
 ENDIF(SDL_TYPE STREQUAL "SDL2")
 
-INCLUDE_DIRECTORIES(${OPENGL_INCLUDE_DIR})
+IF(OPENGL_TYPE STREQUAL "OPENGL")
+  INCLUDE_DIRECTORIES(${OPENGL_INCLUDE_DIR})
+ENDIF(OPENGL_TYPE STREQUAL "OPENGL")
+
+IF(OPENGL_TYPE STREQUAL "OPENGLES")
+  ADD_DEFINITIONS(-DUSE_OPENGL_ES=1)
+  INCLUDE_DIRECTORIES(${OPENGLES_INCLUDE_DIR})
+  INCLUDE_DIRECTORIES(${EGL_INCLUDE_DIR})
+ENDIF(OPENGL_TYPE STREQUAL "OPENGLES")
+
 INCLUDE_DIRECTORIES(${OPENAL_INCLUDE_DIR})
 
 IF(SDL_TYPE STREQUAL "SDL")
@@ -337,5 +397,13 @@ IF(SDL_TYPE STREQUAL "SDL2")
     TARGET_LINK_LIBRARIES(avp ${SDL2_LIBRARY})
 ENDIF(SDL_TYPE STREQUAL "SDL2")
 
-TARGET_LINK_LIBRARIES(avp ${OPENGL_gl_LIBRARY})
+IF(OPENGL_TYPE STREQUAL "OPENGL")
+  TARGET_LINK_LIBRARIES(avp ${OPENGL_gl_LIBRARY})
+ENDIF(OPENGL_TYPE STREQUAL "OPENGL")
+
+IF(OPENGL_TYPE STREQUAL "OPENGLES")
+  TARGET_LINK_LIBRARIES(avp ${OPENGLES_gl_LIBRARY})
+  TARGET_LINK_LIBRARIES(avp ${EGL_LIBRARIES})
+ENDIF(OPENGL_TYPE STREQUAL "OPENGLES")
+
 TARGET_LINK_LIBRARIES(avp ${OPENAL_LIBRARY})
-- 
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