vendor: OpenCV 5.0.0 snapshot at 40738fb16ceddb5fb3fea747585f7ce6abb0605b

modules/highgui/cmake/detect_gtk.cmake

@@ -0,0 +1,49 @@
+# --- GTK ---
+ocv_clear_vars(HAVE_GTK HAVE_GTK2 HAVE_GTK3 HAVE_GTKGLEXT)
+if(WITH_GTK)
+  if(NOT WITH_GTK_2_X)
+    ocv_check_modules(GTK3 gtk+-3.0)
+    if(HAVE_GTK3)
+      ocv_add_external_target(gtk3 "${GTK3_INCLUDE_DIRS}" "${GTK3_LIBRARIES}" "HAVE_GTK3;HAVE_GTK")
+      set(HAVE_GTK TRUE)
+    endif()
+  endif()
+  if((PROJECT_NAME STREQUAL "OpenCV" AND HIGHGUI_ENABLE_PLUGINS) OR NOT HAVE_GTK3)
+    ocv_check_modules(GTK2 gtk+-2.0)
+    if(HAVE_GTK2)
+      set(MIN_VER_GTK "2.18.0")
+      if(GTK2_VERSION VERSION_LESS MIN_VER_GTK)
+        message(FATAL_ERROR "GTK support requires a minimum version of ${MIN_VER_GTK} (${GTK2_VERSION} found)")
+      else()
+        ocv_add_external_target(gtk2 "${GTK2_INCLUDE_DIRS}" "${GTK2_LIBRARIES}" "HAVE_GTK2;HAVE_GTK")
+        set(HAVE_GTK TRUE)
+      endif()
+    endif()
+  endif()
+  if((WITH_OPENGL OR HAVE_OPENGL) AND (HAVE_GTK2 OR HAVE_GTK3))
+    if(HAVE_GTK2)
+      ocv_check_modules(GTKGLEXT gtkglext-1.0)
+      if(HAVE_GTKGLEXT)
+        # HACK for https://github.com/opencv/opencv/issues/20850
+        # pkg-config reports some include directories that do not exist. Just filter them out.
+        set(GTKGLEXT_INCLUDE_DIRS_EXISTS "")
+        foreach(p ${GTKGLEXT_INCLUDE_DIRS})
+          if (EXISTS "${p}")
+            list(APPEND GTKGLEXT_INCLUDE_DIRS_EXISTS "${p}")
+          endif()
+        endforeach()
+        ocv_add_external_target(gtkglext "${GTKGLEXT_INCLUDE_DIRS}" "${GTKGLEXT_LIBRARIES}" "HAVE_GTKGLEXT")
+      endif()
+    endif()
+  endif()
+elseif(HAVE_GTK)
+  ocv_add_external_target(gtk "${GTK_INCLUDE_DIRS}" "${GTK_LIBRARIES}" "${GTK_DEFINES};HAVE_GTK")
+endif()
+
+if(WITH_OPENGL)
+  find_package(OpenGL QUIET)
+  if(OPENGL_FOUND)
+    set(HAVE_OPENGL TRUE)
+    ocv_add_external_target(gtk_opengl "${OPENGL_INCLUDE_DIRS}" "${OPENGL_LIBRARIES}" "HAVE_OPENGL")
+  endif()
+endif()