Add support for linking OpenSceneGraph statically

Added some basic support for linking to OpenSceneGraph and its plugins
statically. Also added a library necessary to statically link MyGUI
(previously Ogre pulled it in).

CMakeLists.txt

@@ -56,6 +56,8 @@ configure_file ("${OpenMW_SOURCE_DIR}/docs/mainpage.hpp.cmake" "${OpenMW_BINARY_
 option(MYGUI_STATIC "Link static build of Mygui into the binaries" FALSE)
 option(BOOST_STATIC "Link static build of Boost into the binaries" FALSE)
 option(SDL2_STATIC "Link static build of SDL into the binaries" FALSE)
+option(OSG_STATIC "Link static build of OpenSceneGraph into the binaries" FALSE)
+option(QT_STATIC "Link static build of QT into the binaries" FALSE)
 
 option(OPENMW_UNITY_BUILD "Use fewer compilation units to speed up compile time" FALSE)
 
@@ -199,9 +201,67 @@ IF(BOOST_STATIC)
     set(Boost_USE_STATIC_LIBS   ON)
 endif()
 
-find_package(OpenSceneGraph 3.2.0 REQUIRED osgDB osgViewer osgGA osgAnimation osgParticle osgQt osgUtil osgFX)
+find_package(OpenSceneGraph 3.2.0 REQUIRED osgDB osgViewer osgText osgGA osgAnimation osgParticle osgQt osgUtil osgFX)
 include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS})
 
+if(OSG_STATIC)
+   macro(use_static_osg_plugin_library PLUGIN_NAME)
+      set(PLUGIN_NAME_DBG ${PLUGIN_NAME}d ${PLUGIN_NAME}D ${PLUGIN_NAME}_d ${PLUGIN_NAME}_D ${PLUGIN_NAME}_debug ${PLUGIN_NAME})
+
+      # For now, users wishing to do a static build will need to pass the path to where the plugins reside
+      # More clever logic would need to deduce the path, probably installed under <OpenSceneGraph>/lib/osgPlugins-<X.X.X>
+      find_library(${PLUGIN_NAME}_LIBRARY_REL NAMES ${PLUGIN_NAME} HINTS ${OSG_PLUGIN_LIB_SEARCH_PATH})
+      find_library(${PLUGIN_NAME}_LIBRARY_DBG NAMES ${PLUGIN_NAME_DBG} HINTS ${OSG_PLUGIN_LIB_SEARCH_PATH})
+      make_library_set(${PLUGIN_NAME}_LIBRARY)
+
+      if("${${PLUGIN_NAME}_LIBRARY}" STREQUAL "")
+         message(FATAL_ERROR "Unable to find static OpenSceneGraph plugin: ${PLUGIN_NAME}")
+      endif()
+
+      set(OPENSCENEGRAPH_LIBRARIES ${OPENSCENEGRAPH_LIBRARIES} ${${PLUGIN_NAME}_LIBRARY})
+   endmacro()
+
+   macro(use_static_osg_plugin_dep DEPENDENCY)
+      find_package(${DEPENDENCY} REQUIRED)
+
+      set(OPENSCENEGRAPH_LIBRARIES ${OPENSCENEGRAPH_LIBRARIES} ${${DEPENDENCY}_LIBRARIES})
+   endmacro()
+
+   add_definitions(-DOSG_LIBRARY_STATIC)
+
+   set(PLUGIN_LIST
+       osgdb_png # depends on libpng, zlib
+       osgdb_tga
+       osgdb_dds
+       osgdb_jpeg # depends on libjpeg
+       )
+
+   foreach(PLUGIN ${PLUGIN_LIST})
+      use_static_osg_plugin_library(${PLUGIN})
+   endforeach()
+
+   # OSG static plugins need to linked against their respective dependencies
+   set(PLUGIN_DEPS_LIST
+       PNG # needed by osgdb_png
+       ZLIB # needed by osgdb_png
+       JPEG # needed by osgdb_jpeg
+       )
+
+   foreach(DEPENDENCY ${PLUGIN_DEPS_LIST})
+      use_static_osg_plugin_dep(${DEPENDENCY})
+   endforeach()
+endif()
+
+if(QT_STATIC)
+   if(WIN32)
+      if(DESIRED_QT_VERSION MATCHES 4)
+         # QtCore needs WSAAsyncSelect from Ws2_32.lib
+         set(QT_QTCORE_LIBRARY ${QT_QTCORE_LIBRARY} Ws2_32.lib)
+         message("QT_QTCORE_LIBRARY: ${QT_QTCORE_LIBRARY}")
+      endif()
+   endif()
+endif()
+
 find_package(MyGUI REQUIRED)
 if (${MYGUI_VERSION} VERSION_LESS "3.2.1")
     message(FATAL_ERROR "OpenMW requires MyGUI 3.2.1 or later, please install the latest version from http://mygui.info")

cmake/FindMyGUI.cmake

@@ -54,6 +54,7 @@ IF (WIN32) #Windows
 
         if ( MYGUI_STATIC )
            set(LIB_SUFFIX "Static")
+           find_package(freetype)
         endif ( MYGUI_STATIC )
 
         find_library ( MYGUI_LIBRARIES_REL NAMES MyGUIEngine${LIB_SUFFIX}.lib HINTS ${MYGUI_LIB_DIR} PATH_SUFFIXES "" release relwithdebinfo minsizerel )

components/resource/texturemanager.cpp

@@ -1,11 +1,24 @@
 #include "texturemanager.hpp"
 
 #include <osgDB/Registry>
+#include <osgViewer/GraphicsWindow>
 
 #include <stdexcept>
 
 #include <components/vfs/manager.hpp>
 
+#ifdef OSG_LIBRARY_STATIC
+// This list of plugins should match with the list in the top-level CMakelists.txt.
+USE_OSGPLUGIN(png)
+USE_OSGPLUGIN(tga)
+USE_OSGPLUGIN(dds)
+USE_OSGPLUGIN(jpeg)
+
+// Sets the default windowing system interface according to the OS.
+// Necessary for OpenSceneGraph to do some things, like decompression.
+USE_GRAPHICSWINDOW()
+#endif
+
 namespace
 {