hunter: add package OpenEXR

Author: rbsheth

cmake/OpenCVFindLibsGrfmt.cmake

@@ -345,6 +345,7 @@ if(WITH_OPENEXR)
   ocv_clear_vars(HAVE_OPENEXR)
   if(NOT BUILD_OPENEXR)
     ocv_clear_internal_cache_vars(OPENEXR_INCLUDE_PATHS OPENEXR_LIBRARIES OPENEXR_ILMIMF_LIBRARY OPENEXR_VERSION)
+    hunter_add_package(OpenEXR)
     include("${OpenCV_SOURCE_DIR}/cmake/OpenCVFindOpenEXR.cmake")
   endif()
 

cmake/OpenCVFindOpenEXR.cmake

@@ -10,7 +10,11 @@
 #
 
 if(NOT OPENCV_SKIP_OPENEXR_FIND_PACKAGE)
+  if(HUNTER_ENABLED)
+    find_package(OpenEXR CONFIG QUIET)
+  else() # no-indent for less diffs
   find_package(OpenEXR 3 QUIET)
+  endif()
   #ocv_cmake_dump_vars(EXR)
   if(OpenEXR_FOUND)
     if(TARGET OpenEXR::OpenEXR)  # OpenEXR 3+

cmake/templates/OpenCVConfig.cmake.in

@@ -383,3 +383,7 @@ endif()
 if("@Eigen3_FOUND@")
   find_dependency(Eigen3 CONFIG)
 endif()
+
+if("@OPENEXR_FOUND@")
+  find_dependency(OpenEXR CONFIG)
+endif()