On 04/22/2013 10:40 AM, Till Oliver Knoll wrote: > 2013/4/20 James Turner <james.tur...@kdab.com>: >> >> On 18 Apr 2013, at 09:09, Till Oliver Knoll <till.oliver.kn...@gmail.com> >> wrote: >> >> So is OpenGL 3.x Core actually supposed to work with Qt 5? Or is this >> still work in progress? >> >> >> It works fine, but the legacy QGL APIs don't help you much. Rough >> pseudo-code which works for me: >> >> QWindow *win = new QWindow >> win->setSurfaceType( OpenGLSurface ); >> >> QSurfaceFormat format; >> format.setMajorVersion( 3 ); >> format.setMinorVersion( 2 ); >> format.setProfile( QSurfaceFormat::CoreProfile ); > > Thanks for the hint about QWindow/OpenGLSurface - didn't know that new > Qt 5 API yet ;)
Sean did a nice write-up on what's happening on the OpenGL side in Qt 5: http://www.kdab.com/opengl-in-qt-5-1-part-1 > And I figured out by now why the previously mentioned "OpenGL Windows" > example "did not work": > > http://qt-project.org/doc/qt-5.0/qtgui/openglwindow.html > > It uses the said QWindow API and basically re-implements the QGLWidget > "initialise-/paint-/resizeGL" functionality - without actually > rendering anything, hence my impression that "it did not work". > I yet have to try out that "TriangleWindow" example code and see > whether it actually works. examples/opengl/hellowindow is also QWindow-based. Also, any QtQuick 2.0 application will use QWindow and QOpenGLContext and no QWidget or QGL*-classes. > However, even it it would work and apart from the huge performance > issues: it would be of no use to me, because QWindow is not derived > from QWidget, is it? So what's the use of having a GL based windows in > a *desktop* application (except for "full-screen" usage maybe)? I > really need a QGLWidget... In 5.1 you can use QWidget::createWindowContainer() to embed a QWindow in a QWidget-hierarchy. But yes, we should probably have a QOpenGLWidget to replace QGLWidget at some point (so that the QtOpenGL module can be fully deprecated). > And apart from QGLWidget and QGLFormat - which apparenty are /not/ > deprecated in Qt 5, and I don't see any QOpenGLFormat, for instance - > I am not using any deprecated Qt OpenGL functionality AFAICT: I > replaced the QGLShaderProgram with QOpenGLShaderProgram. QSurfaceFormat is meant to be the replacement for QGLFormat. > My assumption/expectation is off course that QOpenGLShaderProgram > /should/ work within a QGLWidget - with a Core 3.2 GL context, that > is. > > I'll investigate more, especially I will start over from an example > that actually /does/ work from the very beginning, and try to squeeze > that into a QGLWidget with a Core 3.2 GL context, using QOpenGLShader. Hmm yes, I don't see why QOpenGLShaderProgram shouldn't work with a QGLWidget. Internally QGLWidget (well QWidget really) and QGLContext are implemented on top of QWindow and QOpenGLContext now (in qwidget_qpa.cpp and qgl_qpa.cpp respectively). -- Samuel _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
