CODEWITHSUNDEEP
c++openglopenclarrayfire
HamzaAB
HamzaAB

Reputation: 67

Using OpenGL from ArrayFire

If I have an af::array A already in GPU memory, what is the procedure to pass it through to OpenGl? My intention is to plot it as a line graph using OpenGl, but I'm not sure how to deal with the fact that the backend of Arrayfire could be OpenCl, CUDA or even the CPU. How does OpenGl achieve ownership of the array? I would preferably like to avoid copying if possible.

On a separate note, if I was to use the in built forge library to plot graphs in Arrayfire, I find that if I follow the tutorials to plot a graph, by pressing and holding on the data in the plot and dragging it somewhere else, the data plot moves from its original location and is no longer correctly aligned with the axis. Is there a way to correct this?

Upvotes: 2

Views: 413

Answers (1)

pradeep
pradeep

Reputation: 747

@HamzaAB

What you are asking is known as GL-CUDA or GL-OpenCL interoperability, if you already don't know about it, which is the area Forge tries to address. You can look the ComputeCopy.h header inside forge repository to understand how to do OpenGL interop.

Having said that, Do you want to reset the transformation you are doing to the line plot, if you want to reset it then there is way. While holding the left control, hit middle mouse button, that will reset the pan/zoom done to the line plot. If you are facing some other issue with forge's line plot, you may raise an issue here and we will try to look into it.

PS. I am one of the core developers of ArrayFire.

Upvotes: 2

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