From 3163a5ac981816575c7dca383eba949f8eca6863 Mon Sep 17 00:00:00 2001
From: David Capello <davidcapello@gmail.com>
Date: Thu, 30 Sep 2010 17:04:32 -0300
Subject: [PATCH] Add support to link ASE with the shared versions of libjpeg,
 libpng, and zlib.

---
 CMakeLists.txt             |  5 ++++-
 src/CMakeLists.txt         | 33 ++++++++++++++++++++++++++++++++-
 third_party/CMakeLists.txt | 21 ++++++++++++++++-----
 3 files changed, 52 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 59aaa1e86..5732036ea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,8 +11,11 @@ project(aseprite)
 ######################################################################
 # Options (these can be specified in cmake command line or modifying CMakeCache.txt)
 
-option(USE_STATIC_LIBC "Use static version of C and C++ runtimes" off)
+option(USE_STATIC_LIBC    "Use static version of C and C++ runtimes" off)
 option(USE_STATIC_ALLEGRO "Use static version of Allegro library" off)
+option(USE_SHARED_JPEGLIB "Use your installed copy of jpeglib" off)
+option(USE_SHARED_ZLIB    "Use your installed copy of zlib" off)
+option(USE_SHARED_LIBPNG  "Use your installed copy of libpng" off)
 
 ######################################################################
 # Directories of third-party libraries
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index fdc54852e..1e2e966a6 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -38,7 +38,38 @@ if(MSVC)
 endif(MSVC)
 
 # Third-party libraries
-set(libs3rdparty freetype jpeg libart_lgpl libpng loadpng tinyxml zlib)
+set(libs3rdparty freetype libart_lgpl loadpng tinyxml)
+
+if(USE_SHARED_JPEGLIB)
+  find_package(JPEG)
+  if(JPEG_FOUND)
+    set(libs3rdparty ${libs3rdparty} ${JPEG_LIBRARIES})
+    include_directories(${JPEG_INCLUDE_DIR})
+  endif(JPEG_FOUND)
+else()
+  set(libs3rdparty ${libs3rdparty} jpeg)
+endif()
+
+if(USE_SHARED_ZLIB)
+  find_package(ZLIB)
+  if(ZLIB_FOUND)
+    set(libs3rdparty ${libs3rdparty} ${ZLIB_LIBRARIES})
+    include_directories(${ZLIB_INCLUDE_DIR})
+  endif(ZLIB_FOUND)
+else()
+  set(libs3rdparty ${libs3rdparty} zlib)
+endif()
+
+if(USE_SHARED_LIBPNG)
+  find_package(PNG)
+  if(PNG_FOUND)
+    set(libs3rdparty ${libs3rdparty} ${PNG_LIBRARIES})
+    add_definitions(${PNG_DEFINITIONS})
+    include_directories(${PNG_INCLUDE_DIR})
+  endif(PNG_FOUND)
+else()
+  set(libs3rdparty ${libs3rdparty} libpng)
+endif()
 
 # All libraries for .exe files
 set(all_libs aseprite-library gui-lib gfx-lib base-lib ${alleg_lib} ${libs3rdparty} ${sys_libs})
diff --git a/third_party/CMakeLists.txt b/third_party/CMakeLists.txt
index 0650b903b..4a9ba5fa2 100644
--- a/third_party/CMakeLists.txt
+++ b/third_party/CMakeLists.txt
@@ -1,17 +1,28 @@
 # ASE - Allegro Sprite Editor
 # Copyright (C) 2001-2010  David Capello
 
-include_directories(. libpng zlib)
+include_directories(.)
 
 if(MSVC)
   add_definitions(-D_CRT_SECURE_NO_WARNINGS)
 endif(MSVC)
 
+if(NOT USE_SHARED_JPEGLIB)
+  add_subdirectory(jpeg)
+endif()
+
+if(NOT USE_SHARED_ZLIB)
+  include_directories(zlib)
+  add_subdirectory(zlib)
+endif()
+
+if(NOT USE_SHARED_LIBPNG)
+  include_directories(libpng)
+  add_subdirectory(libpng)
+endif()
+
+add_subdirectory(gtest)
 add_subdirectory(freetype)
-add_subdirectory(jpeg)
 add_subdirectory(libart_lgpl)
-add_subdirectory(libpng)
 add_subdirectory(loadpng)
 add_subdirectory(tinyxml)
-add_subdirectory(zlib)
-add_subdirectory(gtest)