libs: make FreeType a submodule

Author: illwieckz

.gitmodules

@@ -4,6 +4,9 @@
 [submodule "libs/crunch"]
 	path = libs/crunch
 	url = https://github.com/DaemonEngine/crunch.git
+[submodule "libs/freetype"]
+	path = libs/freetype
+	url = https://github.com/DaemonEngine/freetype.git
 [submodule "libs/googletest"]
 	path = libs/googletest
 	url = https://github.com/DaemonEngine/googletest.git

CMakeLists.txt

@@ -784,6 +784,8 @@ if (USE_BREAKPAD)
     endif()
 endif()
 
+option(USE_SYSTEM_LIBS "Tries to use system libs where possible." ON)
+
 if (BUILD_CLIENT)
     find_package(Ogg REQUIRED)
     include_directories(${OGG_INCLUDE_DIRS})
@@ -809,7 +811,12 @@ if (BUILD_CLIENT)
     include_directories(${PNG_INCLUDE_DIRS})
     set(LIBS_CLIENT ${LIBS_CLIENT} ${PNG_LIBRARIES})
 
-    find_package(Freetype REQUIRED)
+    if (USE_SYSTEM_LIBS)
+        find_package(Freetype REQUIRED)
+    else()
+        include(${DAEMON_DIR}/freetype.cmake)
+    endif()
+
     include_directories(${FREETYPE_INCLUDE_DIRS})
     set(LIBS_CLIENT ${LIBS_CLIENT} ${FREETYPE_LIBRARIES})
 

freetype.cmake

@@ -0,0 +1,18 @@
+set(FT_DISABLE_BROTLI ON CACHE STRING "Disable Brotli" FORCE)
+set(FT_DISABLE_BZIP2 ON CACHE STRING "Disable bzip2" FORCE)
+set(FT_DISABLE_HARFBUZZ ON CACHE STRING "Disable HarfBuzz" FORCE)
+set(FT_DISABLE_PNG ON CACHE STRING "Disable PNG" FORCE)
+
+if (NACL)
+	set(FREETYPE_INTERNAL_ZLIB ON)
+else()
+	set(FREETYPE_INTERNAL_ZLIB OFF)
+endif()
+
+set(FT_DISABLE_ZLIB ${FREETYPE_INTERNAL_ZLIB} CACHE STRING "Disable external zlib" FORCE)
+
+set(FREETYPE_DIR ${DAEMON_DIR}/libs/freetype)
+set(FREETYPE_INCLUDE_DIRS ${FREETYPE_DIR}/include)
+
+add_subdirectory(${FREETYPE_DIR})
+set(FREETYPE_LIBRARIES freetype)