topic Thanks Alec, in OpenCL* for CPU

CL / GL interop problem with clCreateFromGLRenderbuffer

Alec_W_ — Fri, 25 Jul 2014 02:51:11 GMT

I am experiencing a problem with sharing a buffer between openCL and openGL.

I have a simple OpenGL application that renders into an offscreen FBO. I then have openCL code that captures the FBO contents using clCreateFromGLRenderbuffer and then post-processes the captured image. When I call clCreateFromGLRenderbuffer, the contents of the FBO get corrupted. I have verified this by using glBlitFramebuffer() to view the FBO contents.

After experiencing this problem, I wanted to determine whether or not this was a bug in my code. So, I ported the code to use the AMD opencl sdk (running on a different machine, with an AMD GPU), and it works fine there.

-Alec

Hi Alec,

Yuri_K_Intel — Fri, 25 Jul 2014 07:23:50 GMT

Hi Alec, May I ask for a reproducer for this issue? And what are expected and actual(corrupted) image data? Thanks, Yuri

Hi Yuri,

Alec_W_ — Sat, 26 Jul 2014 00:30:15 GMT

Hi Yuri,

I sent you a message with the code that experiences the problem. Let me know if you have any problems reproducing the issue.

-Alec

Thanks Alec,

Yuri_K_Intel — Tue, 29 Jul 2014 10:23:30 GMT

Thanks Alec, I have reproduced the problem and I have created a ticket for it. Yuri

Alec_W_ — Wed, 30 Jul 2014 01:43:12 GMT

Thanks Yuri. Any suggestions on a work-around?

-Alec