Let's say I have a QOpenGLWidget in a dock widget. Every time I dock or undock the dock widget, the GL widget gets a new context.
I would like to use context sharing so that I only need to create my GL resources (shaders, textures, buffers) once, and reuse them as the widget is docked and undocked. Well... it seems to be working with buffers and shaders... but if I try to "reuse" textures (i.e. not destroy and recreate them when the context "changes"), my application crashes: = Invalid read of size 8 = at 0x5990F94: glBindTexture (qopenglfunctions.h:623) = by 0x5990F94: bind (qopengltexture.cpp:247) = by 0x5990F94: QOpenGLTexture::bind() (qopengltexture.cpp:2474) = Address 0x1a5f5fe0 is 0 bytes inside a block of size 8 free'd = at 0x483A0D6: operator delete(void*, unsigned long) = by 0x570224F: QOpenGLContext::destroy() (qopenglcontext.cpp:655) Am I missing something? Is this not supported? TBH, it feels a little buggy; AFAICT, the QOpenGLTexture retains a copy of the QOpenGLFunctions from the context which created it, which is *unique* to that context rather than being shared between shared contexts... which all seems a little bit dodgy. (Note: I am using Qt::AA_ShareOpenGLContexts...) -- Matthew _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
