Build: show draco library under extern folder in Visual Studio

And other code tweaks to make this library more consistent with others.

Differential Revision: https://developer.blender.org/D6864

build_files/cmake/macros.cmake

@@ -170,6 +170,7 @@ function(blender_include_dirs_sys
 endfunction()
 
 function(blender_source_group
+  name
   sources
   )
 
@@ -205,6 +206,13 @@ function(blender_source_group
       source_group("${GROUP_ID}" FILES ${_SRC})
     endforeach()
   endif()
+
+  # if enabled, set the FOLDER property for visual studio projects
+  if(WINDOWS_USE_VISUAL_STUDIO_PROJECT_FOLDERS)
+    get_filename_component(FolderDir ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+    string(REPLACE ${CMAKE_SOURCE_DIR} "" FolderDir ${FolderDir})
+    set_target_properties(${name} PROPERTIES FOLDER ${FolderDir})
+  endif()
 endfunction()
 
 
@@ -308,14 +316,7 @@ function(blender_add_lib__impl
 
   # works fine without having the includes
   # listed is helpful for IDE's (QtCreator/MSVC)
-  blender_source_group("${sources}")
-
-  # if enabled, set the FOLDER property for visual studio projects
-  if(WINDOWS_USE_VISUAL_STUDIO_PROJECT_FOLDERS)
-    get_filename_component(FolderDir ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
-    string(REPLACE ${CMAKE_SOURCE_DIR} "" FolderDir ${FolderDir})
-    set_target_properties(${name} PROPERTIES FOLDER ${FolderDir})
-  endif()
+  blender_source_group("${name}" "${sources}")
 
   list_assert_duplicates("${sources}")
   list_assert_duplicates("${includes}")

extern/draco/CMakeLists.txt

@@ -24,6 +24,21 @@ set(CMAKE_CXX_STANDARD 14)
 add_subdirectory(dracoenc)
 
 # Build blender-draco-exporter module.
-add_library(extern_draco SHARED src/draco-compressor.cpp src/draco-compressor.h)
-target_include_directories(extern_draco PUBLIC dracoenc/src)
-target_link_libraries(extern_draco PUBLIC dracoenc)
+set(SRC
+  src/draco-compressor.cpp
+  src/draco-compressor.h
+)
+
+set(INC
+  dracoenc/src
+)
+
+set(LIB
+  dracoenc
+)
+
+add_library(extern_draco SHARED "${SRC}")
+target_include_directories(extern_draco PUBLIC "${INC}")
+target_link_libraries(extern_draco PUBLIC "${LIB}")
+
+blender_source_group(extern_draco "${SRC}")