Hi,
One important question maybe: Do you use this application via remote desktop and how do you start it? On WINDOWS 7, there were some problems with OpenGL forwarding via remote desktop and there were differences between starting the application on the server and connect afterwards or connect via remote desktop ant start it there. Maybe somethig got better by the way. - Michael. From: Interest [mailto:interest-bounces+sue=sf.mpg...@qt-project.org] On Behalf Of Andy Sent: Tuesday, May 17, 2016 2:26 PM To: Boudewijn Rempt <b...@valdyas.org>; Qt Project <interest@qt-project.org> Subject: Re: [Interest] Divining the opengl versions available FWIW here's how I'm doing it. I set the default format at startup with my requested format: void initOpenGL() { QSurfaceFormat format; format.setVersion( 3, 3 ); format.setProfile( QSurfaceFormat::CoreProfile ); format.setDepthBufferSize( 24 ); format.setSamples( 4 ); format.setStencilBufferSize( 8 ); QSurfaceFormat::setDefaultFormat( format ); } Then I call this to dump some info so I know what I'm getting: void openGLInfo() { // we need a QSurface active to get our GL functions from the context QWindow surface; surface.setSurfaceType( QSurface::OpenGLSurface ); surface.create(); QOpenGLContext context; context.create(); context.makeCurrent( &surface ); QOpenGLFunctions *funcs = context.functions(); funcs->initializeOpenGLFunctions(); qInfo() << "OpenGL Info"; qInfo() << " Vendor: " << reinterpret_cast<const char *>(funcs->glGetString( GL_VENDOR )); qInfo() << " Renderer: " << reinterpret_cast<const char *>(funcs->glGetString( GL_RENDERER )); qInfo() << " Version: " << reinterpret_cast<const char *>(funcs->glGetString( GL_VERSION )); qInfo() << " Shading language: " << reinterpret_cast<const char *>(funcs->glGetString( GL_SHADING_LANGUAGE_VERSION )); qInfo() << " Requested format: " << QSurfaceFormat::defaultFormat(); qInfo() << " Current format: " << context.format(); } Which gives me something like this: OpenGL Info Vendor: NVIDIA Corporation Renderer: NVIDIA GeForce GTX 780M OpenGL Engine Version: 4.1 NVIDIA-10.4.2 310.41.35f01 Shading language: 4.10 Requested format: QSurfaceFormat(version 3.3, options QFlags(), depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize 8, samples 4, swapBehavior 0, swapInterval 1, profile 1) Current format: QSurfaceFormat(version 4.1, options QFlags(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize -1, stencilBufferSize 8, samples 4, swapBehavior 2, swapInterval 1, profile 1) (Note: This only gives me a 3.0 context on VMware Fusion 8.1 running Windows 7 - should support 3.3 - so maybe I'm doing something wrong?) If anyone has any suggestions for improvement it would be most welcome! --- Andy Maloney // https://asmaloney.com twitter ~ @asmaloney <https://twitter.com/asmaloney> On Tue, May 17, 2016 at 4:05 AM, Giuseppe D'Angelo <dange...@gmail.com <mailto:dange...@gmail.com> > wrote: On Tue, May 17, 2016 at 9:59 AM, Boudewijn Rempt <b...@valdyas.org <mailto:b...@valdyas.org> > wrote: > Hm... But when I tried that with a nonsense version, say 9.9, I > got 9.9 back. Maybe I made a mistake, though. I copied the functions > check approach from the tesselation example from KDab's website... Did you _create_ the context or just set a format and asked for it back immediately? Using the functions for just testing whether you've got a certain GL version seems to me to be doing it the other way around. Then, sure, once you're happy with the version you need to grab them and use them. -- Giuseppe D'Angelo _______________________________________________ Interest mailing list Interest@qt-project.org <mailto:Interest@qt-project.org> http://lists.qt-project.org/mailman/listinfo/interest
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