From 955d6f7bc1bfb154bac79d7357e55d720aa95e69 Mon Sep 17 00:00:00 2001
From: Dmitry Marakasov <amdmi3@amdmi3.ru>
Date: Fri, 5 Sep 2014 04:57:32 +0400
Subject: [PATCH] Add SDL_image2 support to cmake

---
 CMakeLists.txt             | 22 ++++++++++++++++------
 cmake/FindSDL2_image.cmake | 27 +++++++++++++++++++++++++++
 2 files changed, 43 insertions(+), 6 deletions(-)
 create mode 100644 cmake/FindSDL2_image.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a2e3ffd..292a325 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,8 +5,19 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 SET(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 
+OPTION(SDL2PP_WITH_IMAGE "Enable SDL2_image support" ON)
+
 # depends
 FIND_PACKAGE(SDL2 REQUIRED)
+SET(SDL2_ALL_INCLUDE_DIRS ${SDL2_INCLUDE_DIR})
+SET(SDL2_ALL_LIBRARIES ${SDL2_LIBRARY})
+IF(SDL2PP_WITH_IMAGE)
+	FIND_PACKAGE(SDL2_image REQUIRED)
+	SET(SDL2_ALL_INCLUDE_DIRS ${SDL2_ALL_INCLUDE_DIRS} ${SDL2_IMAGE_INCLUDE_DIR})
+	SET(SDL2_ALL_LIBRARIES ${SDL2_ALL_LIBRARIES} ${SDL2_IMAGE_LIBRARY})
+ELSE(SDL2PP_WITH_IMAGE)
+	MESSAGE(STATUS "SDL2_image support disabled")
+ENDIF(SDL2PP_WITH_IMAGE)
 
 # compiler flags & definitions
 IF(MSVC)
@@ -17,8 +28,8 @@ ELSE(MSVC)
 	SET(WERROR_FLAG "-Werror")
 ENDIF(MSVC)
 
-INCLUDE_DIRECTORIES(${PROJECT_SOURCE_DIR})
-INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIR})
+INCLUDE_DIRECTORIES(BEFORE ${PROJECT_SOURCE_DIR})
+INCLUDE_DIRECTORIES(${SDL2_ALL_INCLUDE_DIRS})
 
 # sources
 SET(LIBRARY_SOURCES
@@ -52,7 +63,7 @@ IF(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
 
 	# library
 	ADD_LIBRARY(SDL2pp SHARED ${LIBRARY_SOURCES} ${LIBRARY_HEADERS})
-	TARGET_LINK_LIBRARIES(SDL2pp ${SDL2_LIBRARY})
+	TARGET_LINK_LIBRARIES(SDL2pp ${SDL2_ALL_LIBRARIES})
 
 	# demos and tests
 	OPTION(RUN_GUI_TESTS "Run GUI tests (requires X11 display)" ON)
@@ -67,7 +78,6 @@ ELSE(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
 	ADD_LIBRARY(SDL2pp STATIC ${LIBRARY_SOURCES} ${LIBRARY_HEADERS})
 
 	# provide variables to parent
-	SET(SDL2PP_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR} ${SDL2_INCLUDE_DIR} PARENT_SCOPE)
-	SET(SDL2PP_LIBRARIES SDL2pp ${SDL2_LIBRARY} PARENT_SCOPE)
+	SET(SDL2PP_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR} ${SDL2_ALL_INCLUDE_DIRS} PARENT_SCOPE)
+	SET(SDL2PP_LIBRARIES SDL2pp ${SDL2_ALL_LIBRARIES} PARENT_SCOPE)
 ENDIF(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
-
diff --git a/cmake/FindSDL2_image.cmake b/cmake/FindSDL2_image.cmake
new file mode 100644
index 0000000..ce91f56
--- /dev/null
+++ b/cmake/FindSDL2_image.cmake
@@ -0,0 +1,27 @@
+# - Try to locate SDL2_image
+# This module defines:
+#
+#  SDL2_IMAGE_INCLUDE_DIR
+#  SDL2_IMAGE_LIBRARY
+#  SDL2_IMAGE_FOUND
+#
+
+FIND_PATH(SDL2_IMAGE_INCLUDE_DIR NAMES SDL2/SDL_image.h)
+
+FIND_LIBRARY(SDL2_IMAGE_LIBRARY NAMES SDL2_image)
+
+IF(SDL2_IMAGE_INCLUDE_DIR AND SDL2_IMAGE_LIBRARY)
+	SET(SDL2_IMAGE_FOUND TRUE)
+ENDIF(SDL2_IMAGE_INCLUDE_DIR AND SDL2_IMAGE_LIBRARY)
+
+IF(SDL2_IMAGE_FOUND)
+	IF(NOT SDL2_IMAGE_FIND_QUIETLY)
+		MESSAGE(STATUS "Found SDL2_image: -I${SDL2_IMAGE_INCLUDE_DIR}, ${SDL2_IMAGE_LIBRARY}")
+	ENDIF(NOT SDL2_IMAGE_FIND_QUIETLY)
+ELSE(SDL2_IMAGE_FOUND)
+	IF(SDL2_IMAGE_FIND_REQUIRED)
+		MESSAGE(FATAL_ERROR "Could not find SDL2")
+	ENDIF(SDL2_IMAGE_FIND_REQUIRED)
+ENDIF(SDL2_IMAGE_FOUND)
+
+MARK_AS_ADVANCED(SDL2_IMAGE_INCLUDE_DIR SDL2_IMAGE_LIBRARY SDL2_IMAGE_FOUND)