Doxygen: add build option to use svg instead of png files for graphs

Differential Revision: http://reviews.llvm.org/D11994

llvm-svn: 245259

clang/docs/CMakeLists.txt

@@ -47,6 +47,14 @@ if (LLVM_ENABLE_DOXYGEN)
     set(clang_doxygen_qhp_cust_filter_attrs "")
   endif()
 
+  option(LLVM_DOXYGEN_SVG
+    "Use svg instead of png files for doxygen graphs." OFF)
+  if (LLVM_DOXYGEN_SVG)
+    set(DOT_IMAGE_FORMAT "svg")
+  else()
+    set(DOT_IMAGE_FORMAT "png")
+  endif()
+
   configure_file(${CMAKE_CURRENT_SOURCE_DIR}/doxygen.cfg.in
     ${CMAKE_CURRENT_BINARY_DIR}/doxygen.cfg @ONLY)
 
@@ -64,6 +72,7 @@ if (LLVM_ENABLE_DOXYGEN)
   set(clang_doxygen_qhelpgenerator_path)
   set(clang_doxygen_qhp_cust_filter_name)
   set(clang_doxygen_qhp_cust_filter_attrs)
+  set(DOT_IMAGE_FORMAT)
 
   add_custom_target(doxygen-clang
     COMMAND ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/doxygen.cfg

clang/docs/Makefile

@@ -30,6 +30,7 @@ $(PROJ_OBJ_DIR)/doxygen.cfg: doxygen.cfg.in
 	  -e 's/@enable_server_based_search@/NO/g' \
 	  -e 's/@extra_search_mappings@//g' \
 	  -e 's/@searchengine_url@//g' \
+	  -e 's/@DOT_IMAGE_FORMAT@/png/g' \
 	  > $@
 endif
 

clang/docs/doxygen.cfg.in

@@ -2205,7 +2205,7 @@ DIRECTORY_GRAPH        = YES
 # The default value is: png.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-DOT_IMAGE_FORMAT       = png
+DOT_IMAGE_FORMAT       = @DOT_IMAGE_FORMAT@
 
 # If DOT_IMAGE_FORMAT is set to svg, then this option can be set to YES to
 # enable generation of interactive SVG images that allow zooming and panning.