Add off-screen rendering through EGL

CMakeLists.txt

@@ -48,6 +48,8 @@ SET(ICET_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})
 
 # Options controlling support libraries
 OPTION(ICET_USE_OPENGL "Build OpenGL support layer for IceT." ON)
+OPTION(ICET_USE_OSMESA "Use OffScreen Mesa" OFF)
+OPTION(ICET_USE_OFFSCREEN_EGL "Use OffScreen rendering through EGL" OFF)
 OPTION(ICET_USE_MPI "Build MPI communication layer for IceT." ON)
 
 # Option to set the preferred K value to use in the radix-k algorithm
@@ -96,19 +98,19 @@ ENDIF (UNIX)
 
 # Configure OpenGL support.
 IF (ICET_USE_OPENGL)
-  FIND_PACKAGE(OpenGL)
-  IF (OPENGL_FOUND)
+  IF (ICET_USE_OSMESA)
+    FIND_PACKAGE(OSMesa REQUIRED)
+    INCLUDE_DIRECTORIES(${OSMESA_INCLUDE_DIR})
+    SET(ICET_OPENGL_LIBRARIES ${OSMESA_LIBRARY})
+  ELSEIF (ICET_USE_OFFSCREEN_EGL)
+    FIND_PACKAGE(EGL REQUIRED)
+    INCLUDE_DIRECTORIES(${EGL_INCLUDE_DIR})
+    SET(ICET_OPENGL_LIBRARIES ${EGL_LIBRARIES})
+  ELSE()
+    FIND_PACKAGE(OpenGL REQUIRED)
     INCLUDE_DIRECTORIES(${OPENGL_INCLUDE_DIR})
     SET(ICET_OPENGL_LIBRARIES ${OPENGL_LIBRARIES})
-  ELSE (OPENGL_FOUND)
-    FIND_PACKAGE(OSMesa)
-    IF (OSMESA_INCLUDE_DIR AND OSMESA_LIBRARY)
-      INCLUDE_DIRECTORIES(${OSMESA_INCLUDE_DIR})
-      SET(ICET_OPENGL_LIBRARIES ${OSMESA_LIBRARY})
-    ELSE(OSMESA_INCLUDE_DIR AND OSMESA_LIBRARY)
-      MESSAGE(SEND_ERROR "Could not find OpenGL or OSMesa, which is required when ICET_USE_OPENGL is ON.")
-    ENDIF (OSMESA_INCLUDE_DIR AND OSMESA_LIBRARY)
-  ENDIF (OPENGL_FOUND)
+  ENDIF()
 ENDIF (ICET_USE_OPENGL)
 
 # Configure MPI support.
@@ -331,7 +333,7 @@ IF (NOT ICET_INSTALL_NO_DEVELOPMENT)
 ENDIF (NOT ICET_INSTALL_NO_DEVELOPMENT)
 
 # Enable CPack packaging.
-SET(CPACK_PACKAGE_DESCRIPTION_FILE ${ICET_SOURCE_DIR}/README)
+SET(CPACK_PACKAGE_DESCRIPTION_FILE ${ICET_SOURCE_DIR}/README.md)
 SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "The Image Composition Engine for Tiles")
 SET(CPACK_PACKAGE_NAME "IceT")
 SET(CPACK_PACKAGE_VENDOR "Sandia National Laboratories")

tests/CMakeLists.txt

@@ -5,7 +5,7 @@
 ## This source code is released under the New BSD License.
 #
 
-IF (ICET_USE_OPENGL)
+IF (ICET_USE_OPENGL AND NOT ICET_USE_OFFSCREEN_EGL)
   SET(ICET_OPENGL_WINDOW_LIBRARY GLUT
     CACHE STRING
     "The name of the library the IceT tests will use to create windows for
@@ -36,7 +36,7 @@ OpenGL contexts. Supported values are GLUT and GLFW."
   ELSE ()
     MESSAGE(SEND_ERROR "Invalid value for ICET_OPENGL_WINDOW_LIBRARY: ${ICET_OPENGL_WINDOW_LIBRARY}")
   ENDIF ()
-ENDIF (ICET_USE_OPENGL)
+ENDIF ()
 
 IF (NOT ICET_TESTS_USE_OPENGL)
   MESSAGE(STATUS "Most tests require ICET_USE_OPENGL and GLUT or GLFW. Those tests are disabled.")