Merge pull request #15059 from hugolm84:improved-support-for-wince

* Improve support for Windows Embedded Compact

* Remove redundant set(WINCE true) and format CMake

3rdparty/zlib/zutil.c

@@ -136,7 +136,7 @@ const char * ZEXPORT zError(err)
     return ERR_MSG(err);
 }
 
-#if defined(_WIN32_WCE)
+#if defined(_WIN32_WCE) && _WIN32_WCE < 0x800
     /* The Microsoft C Run-Time Library for Windows CE doesn't have
      * errno.  We define it as a global variable to simplify porting.
      * Its value is always 0 and should not be used.

3rdparty/zlib/zutil.h

@@ -169,11 +169,13 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
 
 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
 #  if defined(_WIN32_WCE)
-#    define fdopen(fd,mode) NULL /* No fdopen() */
-#    ifndef _PTRDIFF_T_DEFINED
-       typedef int ptrdiff_t;
-#      define _PTRDIFF_T_DEFINED
-#    endif
+#    if _WIN32_WCE < 0x800
+#      define fdopen(fd,mode) NULL /* No fdopen() */
+#      ifndef _PTRDIFF_T_DEFINED
+         typedef int ptrdiff_t;
+#        define _PTRDIFF_T_DEFINED
+#      endif
+#  endif
 #  else
 #    define fdopen(fd,type)  _fdopen(fd,type)
 #  endif

CMakeLists.txt

@@ -53,35 +53,6 @@ if(NOT DEFINED CMAKE_INSTALL_PREFIX)
   endif()
 endif()
 
-if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore)
-  set(WINRT TRUE)
-endif()
-
-if(WINRT)
-  add_definitions(-DWINRT -DNO_GETENV)
-
-  # Making definitions available to other configurations and
-  # to filter dependency restrictions at compile time.
-  if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone)
-    set(WINRT_PHONE TRUE)
-    add_definitions(-DWINRT_PHONE)
-  elseif(CMAKE_SYSTEM_NAME MATCHES WindowsStore)
-    set(WINRT_STORE TRUE)
-    add_definitions(-DWINRT_STORE)
-  endif()
-
-  if(CMAKE_SYSTEM_VERSION MATCHES 10)
-    set(WINRT_10 TRUE)
-    add_definitions(-DWINRT_10)
-  elseif(CMAKE_SYSTEM_VERSION MATCHES 8.1)
-    set(WINRT_8_1 TRUE)
-    add_definitions(-DWINRT_8_1)
-  elseif(CMAKE_SYSTEM_VERSION MATCHES 8.0)
-    set(WINRT_8_0 TRUE)
-    add_definitions(-DWINRT_8_0)
-  endif()
-endif()
-
 if(POLICY CMP0026)
   cmake_policy(SET CMP0026 NEW)
 endif()
@@ -136,6 +107,39 @@ enable_testing()
 
 project(OpenCV CXX C)
 
+if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore)
+  set(WINRT TRUE)
+endif()
+
+if(WINRT OR WINCE)
+  add_definitions(-DNO_GETENV)
+endif()
+
+if(WINRT)
+  add_definitions(-DWINRT)
+
+  # Making definitions available to other configurations and
+  # to filter dependency restrictions at compile time.
+  if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone)
+    set(WINRT_PHONE TRUE)
+    add_definitions(-DWINRT_PHONE)
+  elseif(CMAKE_SYSTEM_NAME MATCHES WindowsStore)
+    set(WINRT_STORE TRUE)
+    add_definitions(-DWINRT_STORE)
+  endif()
+
+  if(CMAKE_SYSTEM_VERSION MATCHES 10)
+    set(WINRT_10 TRUE)
+    add_definitions(-DWINRT_10)
+  elseif(CMAKE_SYSTEM_VERSION MATCHES 8.1)
+    set(WINRT_8_1 TRUE)
+    add_definitions(-DWINRT_8_1)
+  elseif(CMAKE_SYSTEM_VERSION MATCHES 8.0)
+    set(WINRT_8_0 TRUE)
+    add_definitions(-DWINRT_8_0)
+  endif()
+endif()
+
 if(MSVC)
   set(CMAKE_USE_RELATIVE_PATHS ON CACHE INTERNAL "" FORCE)
 endif()

modules/core/include/opencv2/core/utils/filesystem.private.hpp

@@ -9,7 +9,7 @@
 #ifndef OPENCV_HAVE_FILESYSTEM_SUPPORT
 #  if defined(__EMSCRIPTEN__) || defined(__native_client__)
      /* no support */
-#  elif defined WINRT
+#  elif defined WINRT || defined _WIN32_WCE
      /* not supported */
 #  elif defined __ANDROID__ || defined __linux__ || defined _WIN32 || \
         defined __FreeBSD__ || defined __bsdi__ || defined __HAIKU__

modules/core/src/glob.cpp

@@ -57,7 +57,7 @@ namespace
 
     struct DIR
     {
-#ifdef WINRT
+#if defined(WINRT) || defined(_WIN32_WCE)
         WIN32_FIND_DATAW data;
 #else
         WIN32_FIND_DATAA data;
@@ -78,7 +78,7 @@ namespace
     {
         DIR* dir = new DIR;
         dir->ent.d_name = 0;
-#ifdef WINRT
+#if defined(WINRT) || defined(_WIN32_WCE)
         cv::String full_path = cv::String(path) + "\\*";
         wchar_t wfull_path[MAX_PATH];
         size_t copied = mbstowcs(wfull_path, full_path.c_str(), MAX_PATH);
@@ -100,7 +100,7 @@ namespace
 
     dirent* readdir(DIR* dir)
     {
-#ifdef WINRT
+#if defined(WINRT) || defined(_WIN32_WCE)
         if (dir->ent.d_name != 0)
         {
             if (::FindNextFileW(dir->handle, &dir->data) != TRUE)

modules/core/src/ocl.cpp

@@ -1722,7 +1722,7 @@ static bool parseOpenCLDeviceConfiguration(const std::string& configurationStr,
     return true;
 }
 
-#ifdef WINRT
+#if defined WINRT || defined _WIN32_WCE
 static cl_device_id selectOpenCLDevice()
 {
     return NULL;

modules/core/src/system.cpp

@@ -378,7 +378,7 @@ struct HWFeatures
 
     void initialize(void)
     {
-#ifndef WINRT
+#ifndef NO_GETENV
         if (getenv("OPENCV_DUMP_CONFIG"))
         {
             fprintf(stderr, "\nOpenCV build configuration is:\n%s\n",
@@ -614,10 +614,10 @@ struct HWFeatures
     {
         bool dump = true;
         const char* disabled_features =
-#ifndef WINRT
-                getenv("OPENCV_CPU_DISABLE");
-#else
+#ifdef NO_GETENV
                 NULL;
+#else
+                getenv("OPENCV_CPU_DISABLE");
 #endif
         if (disabled_features && disabled_features[0] != 0)
         {
@@ -892,7 +892,7 @@ String format( const char* fmt, ... )
 String tempfile( const char* suffix )
 {
     String fname;
-#ifndef WINRT
+#ifndef NO_GETENV
     const char *temp_dir = getenv("OPENCV_TEMP_PATH");
 #endif
 
@@ -913,6 +913,20 @@ String tempfile( const char* suffix )
     CV_Assert((copied != MAX_PATH) && (copied != (size_t)-1));
     fname = String(aname);
     RoUninitialize();
+#elif defined(_WIN32_WCE)
+    const auto kMaxPathSize = MAX_PATH+1;
+    wchar_t temp_dir[kMaxPathSize] = {0};
+    wchar_t temp_file[kMaxPathSize] = {0};
+
+    ::GetTempPathW(kMaxPathSize, temp_dir);
+
+    if(0 != ::GetTempFileNameW(temp_dir, L"ocv", 0, temp_file)) {
+        DeleteFileW(temp_file);
+        char aname[MAX_PATH];
+        size_t copied = wcstombs(aname, temp_file, MAX_PATH);
+        CV_Assert((copied != MAX_PATH) && (copied != (size_t)-1));
+        fname = String(aname);
+    }
 #else
     char temp_dir2[MAX_PATH] = { 0 };
     char temp_file[MAX_PATH] = { 0 };

platforms/wince/arm-wince-headless-overrides.cmake

@@ -0,0 +1,12 @@
+if(WINCE)
+  # CommCtrl.lib does not exist in headless WINCE Adding this will make CMake
+  # Try_Compile succeed and therefore also C/C++ ABI Detetection work
+  # https://gitlab.kitware.com/cmake/cmake/blob/master/Modules/Platform/Windows-
+  # MSVC.cmake
+  set(CMAKE_C_STANDARD_LIBRARIES_INIT "coredll.lib")
+  set(CMAKE_CXX_STANDARD_LIBRARIES_INIT ${CMAKE_C_STANDARD_LIBRARIES_INIT})
+  foreach(ID EXE SHARED MODULE)
+    string(APPEND CMAKE_${ID}_LINKER_FLAGS_INIT
+           " /NODEFAULTLIB:libc.lib /NODEFAULTLIB:oldnames.lib")
+  endforeach()
+endif()

platforms/wince/arm-wince.toolchain.cmake

@@ -0,0 +1,35 @@
+set(CMAKE_SYSTEM_NAME WindowsCE)
+
+if(NOT CMAKE_SYSTEM_VERSION)
+  set(CMAKE_SYSTEM_VERSION 8.0)
+endif()
+
+if(NOT CMAKE_SYSTEM_PROCESSOR)
+  set(CMAKE_SYSTEM_PROCESSOR armv7-a)
+endif()
+
+if(NOT CMAKE_GENERATOR_TOOLSET)
+  set(CMAKE_GENERATOR_TOOLSET CE800)
+endif()
+
+# Needed to make try_compile to succeed
+if(BUILD_HEADLESS)
+  set(CMAKE_USER_MAKE_RULES_OVERRIDE
+      ${CMAKE_CURRENT_LIST_DIR}/arm-wince-headless-overrides.cmake)
+endif()
+
+if(NOT CMAKE_FIND_ROOT_PATH_MODE_PROGRAM)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+endif()
+
+if(NOT CMAKE_FIND_ROOT_PATH_MODE_LIBRARY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+endif()
+
+if(NOT CMAKE_FIND_ROOT_PATH_MODE_INCLUDE)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
+if(NOT CMAKE_FIND_ROOT_PATH_MODE_PACKAGE)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+endif()

platforms/wince/readme.md

@@ -0,0 +1,62 @@
+# Building OpenCV from Source for Windows Embedded Compact (WINCE/WEC)
+
+## Requirements
+CMake 3.1.0 or higher
+Windows Embedded Compact SDK
+
+## Configuring
+To configure CMake for Windows Embedded, specify Visual Studio 2013 as generator and the name of your installed SDK:
+
+`cmake -G "Visual Studio 12 2013" -A "MySDK WEC2013" -DCMAKE_TOOLCHAIN_FILE:FILEPATH=../platforms/wince/arm-wince.toolchain.cmake`
+
+If you are building for a headless WINCE, specify `-DBUILD_HEADLESS=ON` when configuring. This will remove the `commctrl.lib` dependency.
+
+If you are building for anything else than WINCE800, you need to specify that in the configuration step. Example:
+
+```
+-DCMAKE_SYSTEM_VERSION=7.0 -DCMAKE_GENERATOR_TOOLSET=CE700 -DCMAKE_SYSTEM_PROCESSOR=arm-v4
+```
+
+For headless WEC2013, this configuration may not be limited to but is known to work:
+
+```
+-DBUILD_EXAMPLES=OFF `
+-DBUILD_opencv_apps=OFF `
+-DBUILD_opencv_calib3d=OFF `
+-DBUILD_opencv_highgui=OFF `
+-DBUILD_opencv_features2d=OFF `
+-DBUILD_opencv_flann=OFF `
+-DBUILD_opencv_ml=OFF `
+-DBUILD_opencv_objdetect=OFF `
+-DBUILD_opencv_photo=OFF `
+-DBUILD_opencv_shape=OFF `
+-DBUILD_opencv_stitching=OFF `
+-DBUILD_opencv_superres=OFF `
+-DBUILD_opencv_ts=OFF `
+-DBUILD_opencv_video=OFF `
+-DBUILD_opencv_videoio=OFF `
+-DBUILD_opencv_videostab=OFF `
+-DBUILD_opencv_dnn=OFF `
+-DBUILD_opencv_java=OFF `
+-DBUILD_opencv_python2=OFF `
+-DBUILD_opencv_python3=OFF `
+-DBUILD_opencv_java_bindings_generator=OFF `
+-DBUILD_opencv_python_bindings_generator=OFF `
+-DBUILD_TIFF=OFF `
+-DCV_TRACE=OFF `
+-DWITH_OPENCL=OFF `
+-DHAVE_OPENCL=OFF `
+-DWITH_QT=OFF `
+-DWITH_GTK=OFF `
+-DWITH_QUIRC=OFF `
+-DWITH_JASPER=OFF `
+-DWITH_WEBP=OFF `
+-DWITH_PROTOBUF=OFF `
+-DBUILD_SHARED_LIBS=OFF `
+-DWITH_OPENEXR=OFF `
+-DWITH_TIFF=OFF `
+```
+
+## Building
+You are required to build using Unicode:
+`cmake --build . -- /p:CharacterSet=Unicode`