problem with eglMakeCurrent, color artifacts on display

vyacheslavsorok — Wed, 19 Dec 2012 10:59:58 GMT

Hi guys,

I have some problems with using the eglMakeCurrent.

There is the embeded device which is based on the IMX6x and uses the QNX as OS and OpengGLES2.0&EGL1.4.

I'm trying to use opengl in the multi-thread application, so I have multiple threads that render to the same surface/context.

Each thread at the beginning of its work with EGL context calls the eglMakeCurrent function and passing the eglContext, eglSurface (for both read/write)

and at the end of work it calls the eglMakeCurrent( mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT ).

In this way I have a context that is active only for one thread.

But as a result I have a lot of color artifacts on the screen.

For experiment I've created a single-threaded application and simple make few context switches:

eglMakeCurrent( mEglDisplay, mEglSurface, mEglSurface, mEglContext )

some opengl operations

eglMakeCurrent( mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT )

eglMakeCurrent( mEglDisplay, mEglSurface, mEglSurface, mEglContext )

some opengl operations

eglMakeCurrent( mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT )

As result I got similar problem - a lot of color artifacts on the screen.

Has anyone faced a similar problem? Can somebody help me?

Thanks in advance, Vyacheslav.

Re: problem with eglMakeCurrent, color artifacts on display

andre_silva — Fri, 18 Jan 2013 17:11:47 GMT

have you tried the same using Linux Operating system ? I never saw an issue like that, also, I didn´t touch qnx yet.

topic problem with eglMakeCurrent, color artifacts on display in i.MX Processors

problem with eglMakeCurrent, color artifacts on display

Re: problem with eglMakeCurrent, color artifacts on display