QOpenGLWidget allows using different OpenGL versions and profiles when the platform supports it. Instead, call defaultFramebufferObject() to get the ID that should be bound.
#Qt 5.5 opengl 4.4 code
Keep this in mind when creating and binding additional framebuffer objects in the rendering code in paintGL(). makeCurrent() ensure that it is bound in the context. in your widget's constructor or in your own paint functions), you must call makeCurrent() first.Īll rendering happens into an OpenGL framebuffer object.
If you need to call the standard OpenGL API functions from other places (e.g. Your widget's OpenGL rendering context is made current when paintGL(), resizeGL(), or initializeGL() is called. If you need to trigger a repaint from places other than paintGL() (a typical example is when using timers to animate scenes), you should call the widget's update() function to schedule an update. Gets called once before the first time resizeGL() or paintGL() is called. initializeGL() - Sets up the OpenGL resources and state.Gets called whenever the widget has been resized (and also when it is shown for the first time because all newly created widgets get a resize event automatically). resizeGL() - Sets up the OpenGL viewport, projection, etc.Gets called whenever the widget needs to be updated. QOpenGLWidget provides three convenient virtual functions that you can reimplement in your subclass to perform the typical OpenGL tasks: It is very simple to use: Make your class inherit from it and use the subclass like any other QWidget, except that you have the choice between using QPainter and standard OpenGL rendering commands. QOpenGLWidget provides functionality for displaying OpenGL graphics integrated into a Qt application. The QOpenGLWidget class is a widget for rendering OpenGL graphics. 打開 qt.pro，註解掉 qtcanvas3d， qt3d, qtconnectivity, qtwayland 這些模組 Prior to reconfiguration, make sure you remove any leftovers from Qt will be installed into /home/bernie/qt5.5.1 Once everything is built, you must run 'make install'. accessibility alsa audio-backend c++11 clock-gettime clock-monotonic compile_examples concurrent cross_compile egl evdev eventfd freetype full-config getaddrinfo getifaddrs icu inotify ipv6ifname large-config largefile libudev linuxfb medium-config minimal-config mremap no-harfbuzz no-pkg-config pcre png posix_fallocate precompile_header qpa qpa reduce_exports release rpath shared small-config zlibįreeType. make examples -nomake tools -nomake tests -no-iconv \ QMAKE_OBJCOPY = arm-linux-gnueabihf-objcopyĮxport PATH=$PATH:/home/bernie/ti-sdk-am335x-evm-08.00.00.00/linux-devkit/sysroots/i686-arago-linux/usr/bin QMAKE_LINK_SHLIB = arm-linux-gnueabihf-g++ QMAKE_CXXFLAGS_RELEASE += -O2 -march=armv7-a QMAKE_CFLAGS_RELEASE += -O2 -march=armv7-a # qmake configuration for building with arm-linux-gnueabi-g++ Vim qt-everywhere-opensource-src-5.3.2/qtbase/mkspecs/linux-arm-gnueabi-g++/nf Make: Leaving directory `/home/bernie/qt-everywhere-opensource-src-5.5.1/qtbase' Make: Leaving directory `/home/bernie/qt-everywhere-opensource-src-5.5.1/qtbase/src' Make: Leaving directory `/home/bernie/qt-everywhere-opensource-src-5.5.1/qtbase/src/gui'
/include/QtCore/././src/corelib/tools/qbytearray.h:98:19: note: the mangling of ‘va_list’ has changed in GCC 4.4 /include/QtCore/././src/corelib/tools/qbytearray.h: In member function ‘void QPdfEnginePrivate::xprintf(const char*. Qt-everywhere-opensource-src-5.3.2/qtbase/mkspecs/device/linux-im圆-g++/nf，
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