Qopenglcontext

Qopenglcontext represents the opengl state of an underlying opengl context. This surface type is intended for internal qt use and requires the use of private api.

Qt5 Opengl Part 0 Creating A Window Trent Reed

Opengl 33 core profile support require for compile and run this demoaccording to recent qt 520.

Qopenglcontext. I am working with c and qt52 on windows and i am using qopenglcontext along with a qwindow to display a 3d scene with opengl. And in order to use any of the qt opengl wrappers you will need a valid qopenglcontext current. A note on platforms.

The only possible symptom i see is that gearboys window does not scale well in the tiling wm i am using spectrwm. Youre not making the created context current so basically glewinit is called without active opengl context. So even trying to use a qopenglcontext from a different thread then the one it was created in will fail.

The surface is an opengl compatible surface and can be used in conjunction with qopenglcontext. When opening the qt5 gearboy frontend this is printed several times. A context stores all of the state associated with this instance of opengl.

I have a class named renderwindow which directly inherits from qwindowduring rendering event i execute this function. The following discussion will cover windows based initialization. It represents the potentially visible default framebuffer that rendering commands will draw to when not drawing to a framebuffer objectthink of a context as an object that holds all of opengl.

Im not sure the full implications of this but tho. When a context is destroyed opengl is destroyed. Call context makecurrentwindow before glewinit and context donecurrent afterwards.

The surface can be rendered to using a software rasterizer and also supports opengl. So what you want is not possible without hacking into the qt implementation. An opengl context represents many things.

This is done by creating an opengl context which is essentially a state machine that stores all data related to the rendering of your application. Because opengl doesnt exist until you create an opengl context opengl context creation is not governed by the opengl specificationit is instead governed by platform specific apis. Before you can start drawing things you need to initialize opengl.

I have a memory leak issue each time qopenglcontextswapbuffers is called. To set up a context set its screen and format such that they match those of the surface or surfaces with which the context is meant to be used if necessary make it share resources with other contexts with setsharecontext and finally call create. Window and opengl context.

This simple examle demonstrates to using qopenglfunctions and qopenglcontext.

Qt5中qopenglcontext Makecurrent Called With Non Opengl Surface