From 518e090045c871531cf32d33da06e671517390f8 Mon Sep 17 00:00:00 2001
From: Jacob Su <suzp1984@gmail.com>
Date: Thu, 22 Apr 2021 15:30:16 +0800
Subject: [PATCH] fix freetype library link error for 7.2 text rendering

---
 CMakeLists.txt                    |  4 +++-
 cmake/modules/FindFreeType2.cmake | 34 +++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 cmake/modules/FindFreeType2.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a60f028d3..1cfd2f37f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,8 +47,10 @@ elseif(APPLE)
   FIND_LIBRARY(IOKit_LIBRARY IOKit)
   FIND_LIBRARY(CoreVideo_LIBRARY CoreVideo)
   MARK_AS_ADVANCED(COCOA_LIBRARY OpenGL_LIBRARY)
+  find_package(FreeType2 REQUIRED)
+  message(STATUS "Found FreeType2 in ${FREETYPE2_INCLUDE_DIR}")
   SET(APPLE_LIBS ${COCOA_LIBRARY} ${IOKit_LIBRARY} ${OpenGL_LIBRARY} ${CoreVideo_LIBRARY})
-  SET(APPLE_LIBS ${APPLE_LIBS} ${GLFW3_LIBRARY} ${ASSIMP_LIBRARY})
+  SET(APPLE_LIBS ${APPLE_LIBS} ${GLFW3_LIBRARY} ${ASSIMP_LIBRARY} ${FREETYPE2_LIBRARY})
   set(LIBS ${LIBS} ${APPLE_LIBS})
 else()
   set(LIBS )
diff --git a/cmake/modules/FindFreeType2.cmake b/cmake/modules/FindFreeType2.cmake
new file mode 100644
index 000000000..61f4f8316
--- /dev/null
+++ b/cmake/modules/FindFreeType2.cmake
@@ -0,0 +1,34 @@
+# - Try to find FreeType2
+# Once done, this will define
+#
+# FreeType2_FOUND - system has FreeType2
+# FreeType2_INCLUDE_DIR - the FreeType2 include directories
+# FreeType2_LIBRARIES - link these to use FreeType2
+FIND_PATH( FREETYPE2_INCLUDE_DIR freetype2/ft2build.h
+	/usr/include
+	/usr/local/include
+	/opt/local/include
+    /usr/local/opt/freetype/include
+	${CMAKE_SOURCE_DIR}/includes
+)
+FIND_LIBRARY( FREETYPE2_LIBRARY freetype
+	/usr/lib64
+	/usr/lib
+	/usr/local/lib
+	/opt/local/lib
+    /usr/local/opt/freetype/lib
+	${CMAKE_SOURCE_DIR}/lib
+)
+IF(FREETYPE2_INCLUDE_DIR AND FREETYPE2_LIBRARY)
+	SET( FREETYPE2_FOUND TRUE )
+	SET( FREETYPE2_LIBRARIES ${FREETYPE2_LIBRARY} )
+ENDIF(FREETYPE2_INCLUDE_DIR AND FREETYPE2_LIBRARY)
+IF(FREETYPE2_FOUND)
+	IF(NOT FREETYPE2_FIND_QUIETLY)
+	MESSAGE(STATUS "Found FREETYPE2: ${FREETYPE2_LIBRARY}")
+	ENDIF(NOT FREETYPE2_FIND_QUIETLY)
+ELSE(FREETYPE2_FOUND)
+	IF(FREETYPE2_FIND_REQUIRED)
+	MESSAGE(FATAL_ERROR "Could not find libfreetype")
+	ENDIF(FREETYPE2_FIND_REQUIRED)
+ENDIF(FREETYPE2_FOUND)