opencv/cmake/OpenCVFindLibsGUI.cmake
Patrick Whalen b2005ccaef Fix broken build for Qt6 with options: WITH_QT=ON and WITH_OPENGL=ON
- QGLWidget changed to QOpenGLWidget in window_QT.h for Qt6 using
  typedef OpenCVQtWidgetBase for handling Qt version

- Implement Qt6/OpenGL functionality in window_QT.cpp

- Swap QGLWidget:: function calls for OpenCVQtWidgetBase:: function calls

- QGLWidget::updateGL deprecated, swap to QOpenGLWidget::update for Qt6

- Add preprocessor definition to detect Qt6 -- HAVE_QT6

- Add OpenGLWidgets to qdeps list in highgui CMakeLists.txt

- find_package CMake command added for locating Qt module OpenGLWidgets

- Added check that Qt6::OpenGLWidgets component is found. Shut off Qt-openGL functionality if not found.
2021-12-09 13:22:20 -08:00

85 lines
2.7 KiB
CMake

# ----------------------------------------------------------------------------
# Detect 3rd-party GUI libraries
# ----------------------------------------------------------------------------
# --- QT4/5 ---
ocv_clear_vars(HAVE_QT HAVE_QT5)
macro(ocv_find_package_Qt4)
find_package(Qt4 COMPONENTS QtCore QtGui QtTest ${ARGN})
if(QT4_FOUND)
set(QT_FOUND 1)
ocv_assert(QT_VERSION_MAJOR EQUAL 4)
endif()
endmacro()
macro(ocv_find_package_Qt OCV_QT_VER)
find_package(Qt${OCV_QT_VER} COMPONENTS Core Gui Widgets Test Concurrent ${ARGN} NO_MODULE)
if(Qt${OCV_QT_VER}_FOUND)
set(QT_FOUND 1)
set(QT_VERSION "${Qt${OCV_QT_VER}_VERSION}")
set(QT_VERSION_MAJOR "${Qt${OCV_QT_VER}_VERSION_MAJOR}")
set(QT_VERSION_MINOR "${Qt${OCV_QT_VER}_VERSION_MINOR}")
set(QT_VERSION_PATCH "${Qt${OCV_QT_VER}_VERSION_PATCH}")
set(QT_VERSION_TWEAK "${Qt${OCV_QT_VER}_VERSION_TWEAK}")
set(QT_VERSION_COUNT "${Qt${OCV_QT_VER}_VERSION_COUNT}")
endif()
endmacro()
if(WITH_QT)
if(NOT WITH_QT GREATER 0)
# BUG: Qt5Config.cmake script can't handle components properly: find_package(QT NAMES Qt6 Qt5 REQUIRED NO_MODULE COMPONENTS Core Gui Widgets Test Concurrent)
ocv_find_package_Qt(6 QUIET)
if(NOT QT_FOUND)
ocv_find_package_Qt(5 QUIET)
endif()
if(NOT QT_FOUND)
ocv_find_package_Qt4(QUIET)
endif()
elseif(WITH_QT EQUAL 4)
ocv_find_package_Qt4(REQUIRED)
else() # WITH_QT=<major version>
ocv_find_package_Qt("${WITH_QT}" REQUIRED)
endif()
if(QT_FOUND)
set(HAVE_QT ON)
if(QT_VERSION_MAJOR GREATER 4)
find_package(Qt${QT_VERSION_MAJOR} COMPONENTS OpenGL QUIET)
if(Qt${QT_VERSION_MAJOR}OpenGL_FOUND)
set(QT_QTOPENGL_FOUND ON) # HAVE_QT_OPENGL is defined below
if(QT_VERSION_MAJOR GREATER 5) # QGL -> QOpenGL
find_package(Qt${QT_VERSION_MAJOR} COMPONENTS OpenGLWidgets QUIET)
if(NOT Qt${QT_VERSION_MAJOR}OpenGLWidgets_FOUND)
message(STATUS "Qt OpenGLWidgets component not found: turning off Qt OpenGL functionality")
set(QT_QTOPENGL_FOUND FALSE)
endif()
endif()
endif()
endif()
endif()
endif()
# --- OpenGl ---
ocv_clear_vars(HAVE_OPENGL HAVE_QT_OPENGL)
if(WITH_OPENGL)
if(WITH_WIN32UI OR (HAVE_QT AND QT_QTOPENGL_FOUND) OR HAVE_GTKGLEXT)
find_package (OpenGL QUIET)
if(OPENGL_FOUND)
set(HAVE_OPENGL TRUE)
list(APPEND OPENCV_LINKER_LIBS ${OPENGL_LIBRARIES})
if(QT_QTOPENGL_FOUND)
set(HAVE_QT_OPENGL TRUE)
else()
ocv_include_directories(${OPENGL_INCLUDE_DIR})
endif()
endif()
endif()
endif(WITH_OPENGL)
# --- Cocoa ---
if(APPLE)
if(NOT IOS AND CV_CLANG)
set(HAVE_COCOA YES)
endif()
endif()