OpenGL textures and cudaArray size

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello.

I’m using OpenGL interop and trying to map an OpenGL texture to be used (written to) with CUDA.
Then I do a cudaGraphicsSubResourceGetMappedArray , in order to have that texture as a cudaArray
Then I’m willing to do a cudaMemcpyFromArray , so I can write to that texture.

So here I need some light:
cudaMemcpyFromArray needs to know the size of the array. How can I figure that from within the texture AS a mapped resource? Or should I know it previously?

Please shed lumens. Thanks!

2

Yes, you need to know the size of the texture, you could query this from OpenGL.

3

Yes, you need to know the size of the texture, you could query this from OpenGL.