highgui: win32ui plugin

cmake/OpenCVFindLibsGUI.cmake

@@ -2,15 +2,6 @@
 #  Detect 3rd-party GUI libraries
 # ----------------------------------------------------------------------------
 
-#--- Win32 UI ---
-ocv_clear_vars(HAVE_WIN32UI)
-if(WITH_WIN32UI)
-  try_compile(HAVE_WIN32UI
-    "${OpenCV_BINARY_DIR}"
-    "${OpenCV_SOURCE_DIR}/cmake/checks/win32uitest.cpp"
-    CMAKE_FLAGS "-DLINK_LIBRARIES:STRING=user32;gdi32")
-endif()
-
 # --- QT4/5 ---
 ocv_clear_vars(HAVE_QT HAVE_QT5)
 if(WITH_QT)

cmake/templates/cvconfig.h.in

@@ -121,9 +121,6 @@
 /* TIFF codec */
 #cmakedefine HAVE_TIFF
 
-/* Win32 UI */
-#cmakedefine HAVE_WIN32UI
-
 /* Define if your processor stores words with the most significant byte
    first (like Motorola and SPARC, unlike Intel and VAX). */
 #cmakedefine WORDS_BIGENDIAN

modules/highgui/CMakeLists.txt

@@ -131,12 +131,6 @@ elseif(WINRT)
     message(STATUS "  ${name}:   Removing 'comctl32.lib, gdi32.lib, ole32.lib, setupapi.lib'")
     message(STATUS "  ${name}:   Leaving '${HIGHGUI_LIBRARIES}'")
   endif()
-elseif(HAVE_WIN32UI)
-  set(OPENCV_HIGHGUI_BUILTIN_BACKEND "WIN32UI")
-  list(APPEND highgui_srcs ${CMAKE_CURRENT_LIST_DIR}/src/window_w32.cpp)
-  if(OpenCV_ARCH STREQUAL "ARM64")
-    list(APPEND HIGHGUI_LIBRARIES "comdlg32" "advapi32")
-  endif()
 elseif(HAVE_COCOA)
   set(OPENCV_HIGHGUI_BUILTIN_BACKEND "COCOA")
   add_definitions(-DHAVE_COCOA)
@@ -144,6 +138,16 @@ elseif(HAVE_COCOA)
   list(APPEND HIGHGUI_LIBRARIES "-framework Cocoa")
 endif()
 
+if(TARGET ocv.3rdparty.win32ui)
+  if("win32ui" IN_LIST HIGHGUI_PLUGIN_LIST OR HIGHGUI_PLUGIN_LIST STREQUAL "all")
+    ocv_create_builtin_highgui_plugin(opencv_highgui_win32 ocv.3rdparty.win32ui "window_w32.cpp")
+  else()
+    set(OPENCV_HIGHGUI_BUILTIN_BACKEND "WIN32UI")
+    list(APPEND highgui_srcs ${CMAKE_CURRENT_LIST_DIR}/src/window_w32.cpp)
+    list(APPEND tgts ocv.3rdparty.win32ui)
+  endif()
+endif()
+
 if(TARGET ocv.3rdparty.gtk3 OR TARGET ocv.3rdparty.gtk2)
   if(TARGET ocv.3rdparty.gtk3 AND NOT WITH_GTK_2_X)
     set(__gtk_dependency "ocv.3rdparty.gtk3")

modules/highgui/cmake/detect_win32ui.cmake

@@ -0,0 +1,17 @@
+#--- Win32 UI ---
+ocv_clear_vars(HAVE_WIN32UI)
+if(WITH_WIN32UI)
+  try_compile(HAVE_WIN32UI
+    "${CMAKE_CURRENT_BINARY_DIR}"
+    "${OpenCV_SOURCE_DIR}/cmake/checks/win32uitest.cpp"
+    CMAKE_FLAGS "-DLINK_LIBRARIES:STRING=user32;gdi32")
+  if(HAVE_WIN32UI)
+    set(__libs "user32" "gdi32")
+    if(OpenCV_ARCH STREQUAL "ARM64")
+      list(APPEND __libs "comdlg32" "advapi32")
+    endif()
+    ocv_add_external_target(win32ui "" "${__libs}" "HAVE_WIN32UI")
+  endif()
+endif()
+
+set(HAVE_WIN32UI "${HAVE_WIN32UI}" PARENT_SCOPE)  # informational

modules/highgui/cmake/init.cmake

@@ -43,8 +43,7 @@ else()
 endif()
 
 add_backend("gtk" WITH_GTK)
-
-# TODO win32
+add_backend("win32ui" WITH_WIN32UI)
 # TODO cocoa
 # TODO qt
 # TODO opengl

modules/highgui/src/backend.hpp

@@ -114,6 +114,10 @@ bool setUIBackend(const std::string& backendName);
 
 #ifndef BUILD_PLUGIN
 
+#ifdef HAVE_WIN32UI
+std::shared_ptr<UIBackend> createUIBackendWin32UI();
+#endif
+
 #ifdef HAVE_GTK
 std::shared_ptr<UIBackend> createUIBackendGTK();
 #endif

modules/highgui/src/precomp.hpp

@@ -67,7 +67,6 @@
 #include <string.h>
 #include <limits.h>
 #include <ctype.h>
-#include <assert.h>
 
 #if defined _WIN32 || defined WINCE
     #include <windows.h>
@@ -127,6 +126,13 @@ void cvSetPropTopmost_COCOA(const char* name, const bool topmost);
 double cvGetPropVsync_W32(const char* name);
 void cvSetPropVsync_W32(const char* name, const bool enabled);
 
+void setWindowTitle_W32(const cv::String& name, const cv::String& title);
+void setWindowTitle_GTK(const cv::String& name, const cv::String& title);
+void setWindowTitle_QT(const cv::String& name, const cv::String& title);
+void setWindowTitle_COCOA(const cv::String& name, const cv::String& title);
+
+int pollKey_W32();
+
 //for QT
 #if defined (HAVE_QT)
 CvRect cvGetWindowRect_QT(const char* name);

modules/highgui/src/registry.impl.hpp

@@ -50,6 +50,14 @@ std::vector<BackendInfo>& getBuiltinBackendsInfo()
 #elif defined(ENABLE_PLUGINS)
         DECLARE_DYNAMIC_BACKEND("QT")
 #endif
+#endif
+
+#ifdef _WIN32
+#ifdef HAVE_WIN32UI
+        DECLARE_STATIC_BACKEND("WIN32", createUIBackendWin32UI)
+#elif defined(ENABLE_PLUGINS)
+        DECLARE_DYNAMIC_BACKEND("WIN32")
+#endif
 #endif
     };
     return g_backends;

modules/highgui/src/window.cpp

@@ -586,6 +586,46 @@ void cv::moveWindow( const String& winname, int x, int y )
 #endif
 }
 
+void cv::setWindowTitle(const String& winname, const String& title)
+{
+    CV_TRACE_FUNCTION();
+
+    {
+        cv::AutoLock lock(cv::getWindowMutex());
+        auto window = findWindow_(winname);
+        if (window)
+        {
+            return window->setTitle(title);
+        }
+    }
+
+#if defined(OPENCV_HIGHGUI_WITHOUT_BUILTIN_BACKEND) && defined(ENABLE_PLUGINS)
+    auto backend = getCurrentUIBackend();
+    if (backend)
+    {
+        CV_LOG_WARNING(NULL, "Can't find window with name: '" << winname << "'. Do nothing");
+        CV_NOT_FOUND_DEPRECATION;
+    }
+    else
+    {
+        CV_LOG_WARNING(NULL, "No UI backends available. Use OPENCV_LOG_LEVEL=DEBUG for investigation");
+    }
+    return;
+#elif defined(HAVE_WIN32UI)
+    return setWindowTitle_W32(winname, title);
+#elif defined (HAVE_GTK)
+    return setWindowTitle_GTK(winname, title);
+#elif defined (HAVE_QT)
+    return setWindowTitle_QT(winname, title);
+#elif defined (HAVE_COCOA)
+    return setWindowTitle_COCOA(winname, title);
+#else
+    CV_Error(Error::StsNotImplemented, "The function is not implemented. "
+        "Rebuild the library with Windows, GTK+ 2.x or Cocoa support. "
+        "If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script");
+#endif
+}
+
 void cv::setWindowProperty(const String& winname, int prop_id, double prop_value)
 {
     CV_TRACE_FUNCTION();
@@ -630,9 +670,9 @@ int cv::waitKey(int delay)
     return (code != -1) ? (code & 0xff) : -1;
 }
 
-#if defined(HAVE_QT) || (defined (WINRT) && !defined (WINRT_8_0)) || \
-    !defined(HAVE_WIN32UI) && (defined(HAVE_GTK) || defined(HAVE_COCOA))
-// pollKey() fallback implementation
+/*
+ * process until queue is empty but don't wait.
+ */
 int cv::pollKey()
 {
     CV_TRACE_FUNCTION();
@@ -646,12 +686,13 @@ int cv::pollKey()
         }
     }
 
+#if defined(HAVE_WIN32UI)
+    return pollKey_W32();
+#else
     // fallback. please implement a proper polling function
     return cvWaitKey(1);
-}
-#elif defined(HAVE_WIN32UI)
-// pollKey() implemented in window_w32.cpp
 #endif
+}
 
 int cv::createTrackbar(const String& trackbarName, const String& winName,
                    int* value, int count, TrackbarCallback callback,
@@ -1203,13 +1244,6 @@ int cv::createButton(const String&, ButtonCallback, void*, int , bool )
 // version with a more capable one without a need to recompile dependent
 // applications or libraries.
 
-void cv::setWindowTitle(const String&, const String&)
-{
-    CV_Error(Error::StsNotImplemented, "The function is not implemented. "
-        "Rebuild the library with Windows, GTK+ 2.x or Cocoa support. "
-        "If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script");
-}
-
 #define CV_NO_GUI_ERROR(funcname) \
     cv::error(cv::Error::StsError, \
     "The function is not implemented. " \
@@ -1360,11 +1394,6 @@ CV_IMPL int cvCreateButton(const char*, void (*)(int, void*), void*, int, int)
     CV_NO_GUI_ERROR("cvCreateButton");
 }
 
-int cv::pollKey()
-{
-    CV_NO_GUI_ERROR("cv::pollKey()");
-}
-
 #endif
 
 /* End of file. */

modules/highgui/src/window_QT.cpp

@@ -63,6 +63,7 @@
     #endif
 #endif
 
+using namespace cv;
 
 //Static and global first
 static GuiReceiver *guiMainThread = NULL;
@@ -197,7 +198,7 @@ void cvSetPropWindow_QT(const char* name,double prop_value)
         Q_ARG(double, prop_value));
 }
 
-void cv::setWindowTitle(const String& winname, const String& title)
+void setWindowTitle_QT(const String& winname, const String& title)
 {
     if (!guiMainThread)
         CV_Error(Error::StsNullPtr, "NULL guiReceiver (please create a window)");

modules/highgui/src/window_cocoa.mm

@@ -795,18 +795,18 @@ void cvSetPropTopmost_COCOA( const char* name, const bool topmost )
     __END__;
 }
 
-void cv::setWindowTitle(const String& winname, const String& title)
+void setWindowTitle_COCOA(const cv::String& winname, const cv::String& title)
 {
     CVWindow *window = cvGetWindow(winname.c_str());
 
     if (window == NULL)
     {
-        namedWindow(winname);
+        cv::namedWindow(winname);
         window = cvGetWindow(winname.c_str());
     }
 
     if (window == NULL)
-        CV_Error(Error::StsNullPtr, "NULL window");
+        CV_Error(cv::Error::StsNullPtr, "NULL window");
 
     NSAutoreleasePool* localpool = [[NSAutoreleasePool alloc] init];
 

modules/highgui/src/window_gtk.cpp

@@ -364,7 +364,7 @@ static void cvImageWidget_set_size(GtkWidget * widget, int max_width, int max_he
 
 
     }
-    assert( image_widget->scaled_image );
+    CV_Assert(image_widget->scaled_image);
 }
 
 static void
@@ -849,7 +849,7 @@ static bool setModeWindow_(const std::shared_ptr<CvWindow>& window, int mode)
     return false;
 }
 
-void cv::setWindowTitle(const String& winname, const String& title)
+void setWindowTitle_GTK(const String& winname, const String& title)
 {
     CV_LOCK_MUTEX();