cmake doxygen support improved

CMakeConf.cmake

@@ -27,6 +27,10 @@ if(NOT DEFINED MAKE_DOXYGEN)
 	message("MAKE_DOXYGEN was not defined, defaulting to FALSE")
 endif()
 
+if(NOT DEFINED DOXYGEN_OUTPUT_DIRECTORY)
+	set(DOXYGEN_OUTPUT_DIRECTORY "." CACHE FILEPATH "Doxygen output directory (relative to <build>/fmwk)")
+endif()
+
 if(MAKE_DOXYGEN)
 	find_package(Doxygen REQUIRED dot)
 endif()
@@ -174,6 +178,8 @@ endfunction()
 
 function(DOXYGEN TARGET)
 	if(MAKE_DOXYGEN)
+		set(DOXYGEN_DOT_IMAGE_FORMAT svg)
+		#set(DOXYGEN_GENERATE_TAGFILE "fmwk.tag")
 		doxygen_add_docs("${TARGET}" ${ARGN} ALL)
 	endif()
 endfunction()
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