From 34e1a2ae5680b9dad24b153a5ed36c813ae946e6 Mon Sep 17 00:00:00 2001
From: Benjamin Eikel <cmake@eikel.org>
Date: Tue, 4 Sep 2012 11:40:06 +0200
Subject: [PATCH] FindSDL: Version support for FindSDL_image

---
 Modules/FindSDL_image.cmake | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/Modules/FindSDL_image.cmake b/Modules/FindSDL_image.cmake
index 8c9e89153..ae2bc69ad 100644
--- a/Modules/FindSDL_image.cmake
+++ b/Modules/FindSDL_image.cmake
@@ -3,6 +3,7 @@
 # SDLIMAGE_LIBRARY, the name of the library to link against
 # SDLIMAGE_FOUND, if false, do not try to link to SDL
 # SDLIMAGE_INCLUDE_DIR, where to find SDL/SDL.h
+# SDLIMAGE_VERSION_STRING - human-readable string containing the version of SDL_image
 #
 # $SDLDIR is an environment variable that would
 # correspond to the ./configure --prefix=$SDLDIR
@@ -58,7 +59,24 @@ find_library(SDLIMAGE_LIBRARY
   /opt
 )
 
+if(SDLIMAGE_INCLUDE_DIR AND EXISTS "${SDLIMAGE_INCLUDE_DIR}/SDL_image.h")
+  file(STRINGS "${SDLIMAGE_INCLUDE_DIR}/SDL_image.h" SDLIMAGE_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_IMAGE_MAJOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDLIMAGE_INCLUDE_DIR}/SDL_image.h" SDLIMAGE_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_IMAGE_MINOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDLIMAGE_INCLUDE_DIR}/SDL_image.h" SDLIMAGE_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_IMAGE_PATCHLEVEL[ \t]+[0-9]+$")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDLIMAGE_VERSION_MAJOR "${SDLIMAGE_VERSION_MAJOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDLIMAGE_VERSION_MINOR "${SDLIMAGE_VERSION_MINOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDLIMAGE_VERSION_PATCH "${SDLIMAGE_VERSION_PATCH_LINE}")
+  set(SDLIMAGE_VERSION_STRING ${SDLIMAGE_VERSION_MAJOR}.${SDLIMAGE_VERSION_MINOR}.${SDLIMAGE_VERSION_PATCH})
+  unset(SDLIMAGE_VERSION_MAJOR_LINE)
+  unset(SDLIMAGE_VERSION_MINOR_LINE)
+  unset(SDLIMAGE_VERSION_PATCH_LINE)
+  unset(SDLIMAGE_VERSION_MAJOR)
+  unset(SDLIMAGE_VERSION_MINOR)
+  unset(SDLIMAGE_VERSION_PATCH)
+endif()
+
 include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDLIMAGE
-                                  REQUIRED_VARS SDLIMAGE_LIBRARY SDLIMAGE_INCLUDE_DIR)
+                                  REQUIRED_VARS SDLIMAGE_LIBRARY SDLIMAGE_INCLUDE_DIR
+                                  VERSION_VAR SDLIMAGE_VERSION_STRING)