Fixed mingw build

modules/highgui/CMakeLists.txt

@@ -244,6 +244,11 @@ if(IOS)
   set(HIGHGUI_LIBRARIES ${HIGHGUI_LIBRARIES} bz2 "-framework QuartzCore" "-framework CoreFoundation" "-framework ImageIO" "-framework CoreGraphics" "-framework AVFoundation")
 endif()
 
+if(MINGW)
+  link_directories("${CMAKE_CURRENT_SOURCE_DIR}/../../3rdparty/lib")
+  include_directories("${CMAKE_CURRENT_SOURCE_DIR}/../../3rdparty/include")#for directshow
+endif()
+
 source_group("Src" FILES ${highgui_srcs} ${highgui_hdrs})
 source_group("Include" FILES ${highgui_ext_hdrs})
 ocv_set_module_sources(HEADERS ${highgui_ext_hdrs} SOURCES ${highgui_srcs} ${highgui_hdrs} ${grfmt_srcs} ${grfmt_hdrs})