apps: add Win32 friendly opencv_version app

Improve experience of launching app from explorer:
- application just flash (open/close) the console window
Suggested Win32 application flavor additionally shows MessageBox
and waits for User interaction.

apps/version/CMakeLists.txt

-SET(OPENCV_APPLICATION_DEPS opencv_core opencv_highgui opencv_imgproc opencv_imgcodecs opencv_videoio)
+set(OPENCV_APPLICATION_DEPS opencv_core)
 ocv_check_dependencies(${OPENCV_APPLICATION_DEPS})
-
 if(NOT OCV_DEPENDENCIES_FOUND)
   return()
 endif()
 
 project(opencv_version)
 set(the_target opencv_version)
-
-ocv_target_include_directories(${the_target} PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}" "${OpenCV_SOURCE_DIR}/include/opencv")
 ocv_target_include_modules_recurse(${the_target} ${OPENCV_APPLICATION_DEPS})
-
-file(GLOB SRCS *.cpp)
-
-ocv_add_executable(${the_target} ${SRCS})
+ocv_add_executable(${the_target} opencv_version.cpp)
 ocv_target_link_libraries(${the_target} ${OPENCV_APPLICATION_DEPS})
 
 set_target_properties(${the_target} PROPERTIES
@@ -30,3 +24,26 @@ if(INSTALL_CREATE_DISTRIB)
 else()
   install(TARGETS ${the_target} RUNTIME DESTINATION ${OPENCV_BIN_INSTALL_PATH} COMPONENT libs)
 endif()
+
+if(WIN32)
+  project(opencv_version_win32)
+  set(the_target opencv_version_win32)
+  ocv_target_include_modules_recurse(${the_target} ${OPENCV_APPLICATION_DEPS})
+  ocv_add_executable(${the_target} opencv_version.cpp)
+  ocv_target_link_libraries(${the_target} ${OPENCV_APPLICATION_DEPS})
+  target_compile_definitions(${the_target} PRIVATE "OPENCV_WIN32_API=1")
+  set_target_properties(${the_target} PROPERTIES
+                        DEBUG_POSTFIX "${OPENCV_DEBUG_POSTFIX}"
+                        RUNTIME_OUTPUT_DIRECTORY ${EXECUTABLE_OUTPUT_PATH}
+                        OUTPUT_NAME "opencv_version_win32")
+
+  set_target_properties(${the_target} PROPERTIES FOLDER "applications")
+
+  if(INSTALL_CREATE_DISTRIB)
+    if(BUILD_SHARED_LIBS)
+      install(TARGETS ${the_target} RUNTIME DESTINATION ${OPENCV_BIN_INSTALL_PATH} CONFIGURATIONS Release COMPONENT libs)
+    endif()
+  else()
+    install(TARGETS ${the_target} RUNTIME DESTINATION ${OPENCV_BIN_INSTALL_PATH} COMPONENT libs)
+  endif()
+endif()

apps/version/opencv_version.cpp

@@ -9,6 +9,31 @@
 
 #include <opencv2/core/opencl/opencl_info.hpp>
 
+#ifdef OPENCV_WIN32_API
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif
+
+static void dumpHWFeatures(bool showAll = false)
+{
+    std::cout << "OpenCV's HW features list:" << std::endl;
+    int count = 0;
+    for (int i = 0; i < CV_HARDWARE_MAX_FEATURE; i++)
+    {
+        cv::String name = cv::getHardwareFeatureName(i);
+        if (name.empty())
+            continue;
+        bool enabled = cv::checkHardwareSupport(i);
+        if (enabled)
+            count++;
+        if (enabled || showAll)
+        {
+            printf("    ID=%3d (%s) -> %s\n", i, name.c_str(), enabled ? "ON" : "N/A");
+        }
+    }
+    std::cout << "Total available: " << count << std::endl;
+}
+
 int main(int argc, const char** argv)
 {
     CV_TRACE_FUNCTION();
@@ -16,6 +41,7 @@ int main(int argc, const char** argv)
     CV_TRACE_ARG_VALUE(argv0, "argv0", argv[0]);
     CV_TRACE_ARG_VALUE(argv1, "argv1", argv[1]);
 
+#ifndef OPENCV_WIN32_API
     cv::CommandLineParser parser(argc, argv,
         "{ help h usage ? |      | show this help message }"
         "{ verbose v      |      | show build configuration log }"
@@ -45,24 +71,14 @@ int main(int argc, const char** argv)
 
     if (parser.has("hw"))
     {
-        bool showAll = parser.get<bool>("hw");
-        std::cout << "OpenCV's HW features list:" << std::endl;
-        int count = 0;
-        for (int i = 0; i < CV_HARDWARE_MAX_FEATURE; i++)
-        {
-            cv::String name = cv::getHardwareFeatureName(i);
-            if (name.empty())
-                continue;
-            bool enabled = cv::checkHardwareSupport(i);
-            if (enabled)
-                count++;
-            if (enabled || showAll)
-            {
-                printf("    ID=%3d (%s) -> %s\n", i, name.c_str(), enabled ? "ON" : "N/A");
-            }
-        }
-        std::cout << "Total available: " << count << std::endl;
+        dumpHWFeatures(parser.get<bool>("hw"));
     }
+#else
+    std::cout << cv::getBuildInformation().c_str() << std::endl;
+    cv::dumpOpenCLInformation();
+    dumpHWFeatures();
+    MessageBoxA(NULL, "Check console window output", "OpenCV(" CV_VERSION ")", MB_ICONINFORMATION | MB_OK);
+#endif
 
     return 0;
 }