Added GLEWDEFINITIONS plugin macro.

Use openflipper_plugin( GLEWDEFINITIONS GL_BUFFER_UPDATE_BARRIER_BIT GL_SHADER_IMAGE_ACCESS_BARRIER_BIT )
to check for glew dependencies
closes #2258
closes #2353

Author: moebius

OpenFlipper/cmake/plugin.cmake

@@ -26,6 +26,7 @@
 # INCDIRS         = additional include directories
 # ADDSRC          = additional source files
 # INSTALLDATA     = directories that will be installed into the openflipper data directory
+# GLEWDEFINITIONS = Checks glew if it defines the given definitions
 #
 # TRANSLATION_LANGUAGES = language codes for translation
 # TRANSLATION_ADDFILES  = additional files that should be included into the translation files
@@ -67,7 +68,7 @@ endmacro ()
 # parse plugin macro parameter
 macro (_get_plugin_parameters _prefix)
     set (_current_var _foo)
-    set (_supported_var DIRS DEPS OPTDEPS LDFLAGSADD CFLAGSADD CDEFINITIONSADD LIBRARIES LIBDIRS INCDIRS ADDSRC INSTALLDATA TRANSLATION_LANGUAGES TRANSLATION_ADDFILES)
+    set (_supported_var DIRS DEPS OPTDEPS LDFLAGSADD CFLAGSADD CDEFINITIONSADD LIBRARIES LIBDIRS INCDIRS ADDSRC INSTALLDATA GLEWDEFINITIONS TRANSLATION_LANGUAGES TRANSLATION_ADDFILES)
     set (_supported_flags LICENSEMANAGER)
     foreach (_val ${_supported_var})
         set (${_prefix}_${_val})
@@ -367,7 +368,31 @@ macro (_plugin_licensemanagement)
   endif()
 endmacro ()
 
+#======================================================
+# check dependencies in GLEW library
+# _prefix    : prefix used ( usually the plugin name )
+#======================================================
+macro (_check_plugin_glew_deps _prefix )
+
+ foreach (_extension ${${_prefix}_GLEWDEFINITIONS})
+
+   acg_test_glew_definition( ${_extension} ${_prefix}_GLEW_HAS_DEFINITION_${_extension}  )
+
+   # If the dependency is not found, we disable the plugin
+   if(NOT ${_prefix}_GLEW_HAS_DEFINITION_${_extension} )
+      set (${_prefix}_HAS_DEPS FALSE)
+      acg_set (_${_prefix}_MISSING_DEPS "${_${_prefix}_MISSING_DEPS} GLEW extension ${_extension}")
+   endif()
+
+ endforeach()
+
+endmacro ()
+
+
+
+#======================================================
 # main function
+#======================================================
 function (_build_openflipper_plugin plugin)
 
   acg_set (OPENFLIPPER_${_PLUGIN}_BUILD "0")
@@ -394,6 +419,12 @@ function (_build_openflipper_plugin plugin)
   set (${_PLUGIN}_HAS_DEPS)
   _check_plugin_deps (${_PLUGIN} FALSE ${${_PLUGIN}_DEPS})
 
+  #============================================================================================
+  # CHECK for GLEW definitions
+  #============================================================================================
+
+  _check_plugin_glew_deps (${_PLUGIN})
+  
 
   #============================================================================================
   # Remember Lib dirs for bundle generation
@@ -727,4 +758,4 @@ macro (openflipper_plugin)
 endmacro ()
 
 # No stupid abundance of "Boost version" messages, please.
-SET (Boost_FIND_QUIETLY TRUE PARENT_SCOPE)
+SET (Boost_FIND_QUIETLY TRUE PARENT_SCOPE)

cmake/ACGCommon.cmake

@@ -957,3 +957,26 @@ function (generate_qhp_file files_loc plugin_name)
         endif()
     endforeach()
 endfunction()
+
+function(acg_test_glew_definition _def _out)
+  include(CheckCXXSourceRuns)
+  set(CMAKE_REQUIRED_INCLUDES ${GLEW_INCLUDE_DIRS})
+  set(CMAKE_REQUIRED_LIBRARIES ${GLEW_LIBRARIES})
+  set(CMAKE_REQUIRED_DEFINITIONS -DCHECKING=${_def})
+  if(GLEW_FOUND)
+    if(NOT ${_out})
+      unset(${_out} CACHE) #clear cache, if previous test failed and try again
+    endif()
+    CHECK_CXX_SOURCE_RUNS("
+      #include <GL/glew.h>
+      int main()
+      {
+      #ifdef ${_def}
+      return 0;
+      #else
+      return 1;
+      #endif
+      }"
+      ${_out})
+  endif()
+endfunction()