Merge pull request #26678 from Kumataro:fix26673

OpenEXR 2.2 or earlier cannot be used with C++17 or later #26678

Close https://github.com/opencv/opencv/issues/26673
Close https://github.com/opencv/opencv/issues/25313

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

cmake/OpenCVDetectCXXCompiler.cmake

@@ -214,6 +214,9 @@ if(NOT OPENCV_SKIP_CMAKE_CXX_STANDARD)
   if(CMAKE_CXX11_COMPILE_FEATURES)
     set(HAVE_CXX11 ON)
   endif()
+  if(CMAKE_CXX17_COMPILE_FEATURES)
+    set(HAVE_CXX17 ON)
+  endif()
 endif()
 if(NOT HAVE_CXX11)
   ocv_check_compiler_flag(CXX "" HAVE_CXX11 "${OpenCV_SOURCE_DIR}/cmake/checks/cxx11.cpp")

cmake/OpenCVFindOpenEXR.cmake

@@ -94,17 +94,20 @@ FOREACH(SEARCH_PATH ${SEARCH_PATHS})
             IF (${contents} MATCHES "#define OPENEXR_VERSION_MINOR ([0-9]+)")
                 SET(OPENEXR_VERSION_MINOR "${CMAKE_MATCH_1}")
             ENDIF ()
+            FILE (STRINGS ${OPENEXR_VERSION_FILE} contents REGEX "#define OPENEXR_VERSION_PATCH ")
+            IF (${contents} MATCHES "#define OPENEXR_VERSION_PATCH ([0-9]+)")
+                SET(OPENEXR_VERSION_PATCH "${CMAKE_MATCH_1}")
+            ENDIF ()
         ENDIF ()
     ENDIF ()
 
-    IF (OPENEXR_VERSION_MAJOR AND OPENEXR_VERSION_MINOR)
-        set(OPENEXR_VERSION "${OPENEXR_VERSION_MAJOR}_${OPENEXR_VERSION_MINOR}")
-    ENDIF ()
+    set(OPENEXR_VERSION_MM "${OPENEXR_VERSION_MAJOR}_${OPENEXR_VERSION_MINOR}")
+    set(OPENEXR_VERSION "${OPENEXR_VERSION_MAJOR}.${OPENEXR_VERSION_MINOR}.${OPENEXR_VERSION_PATCH}")
 
-    ocv_find_openexr("-${OPENEXR_VERSION}")
-    ocv_find_openexr("-${OPENEXR_VERSION}_s")
-    ocv_find_openexr("-${OPENEXR_VERSION}_d")
-    ocv_find_openexr("-${OPENEXR_VERSION}_s_d")
+    ocv_find_openexr("-${OPENEXR_VERSION_MM}")
+    ocv_find_openexr("-${OPENEXR_VERSION_MM}_s")
+    ocv_find_openexr("-${OPENEXR_VERSION_MM}_d")
+    ocv_find_openexr("-${OPENEXR_VERSION_MM}_s_d")
     ocv_find_openexr("")
     ocv_find_openexr("_s")
     ocv_find_openexr("_d")
@@ -118,6 +121,7 @@ FOREACH(SEARCH_PATH ${SEARCH_PATHS})
     UNSET(OPENEXR_VERSION_FILE)
     UNSET(OPENEXR_VERSION_MAJOR)
     UNSET(OPENEXR_VERSION_MINOR)
+    UNSET(OPENEXR_VERSION_MM)
     UNSET(OPENEXR_VERSION)
 ENDFOREACH()
 
@@ -144,6 +148,11 @@ IF(OPENEXR_FOUND)
   endif()
   if(NOT OPENEXR_VERSION)
     SET(OPENEXR_VERSION "Unknown")
+  else()
+    if(HAVE_CXX17 AND OPENEXR_VERSION VERSION_LESS "2.3.0")
+      message(STATUS "  OpenEXR(ver ${OPENEXR_VERSION}) doesn't support C++17 and higher. Updating OpenEXR 2.3.0+ is required.")
+      SET(OPENEXR_FOUND FALSE)
+    endif()
   endif()
 ELSE()
   IF(OPENEXR_FIND_REQUIRED)

doc/tutorials/introduction/config_reference/config_reference.markdown

@@ -317,6 +317,8 @@ All libraries required to read images in these formats are included into OpenCV
 @note OpenJPEG have higher priority than JasPer which is deprecated. In order to use JasPer, OpenJPEG must be disabled.
 @note (JPEG XL) OpenCV doesn't contain libjxl source code, so `BUILD_JPEGXL` is not supported.
 
+@warning OpenEXR ver 2.2 or earlier cannot be used in combination with C++17 or later. In this case, updating OpenEXR ver 2.3.0 or later is required.
+
 ### GDAL integration
 
 `WITH_GDAL` (default: _OFF_)