[D] Neural Networks using a generic GPU framework

I have a (personal) ML project that uses CNNs but I have two little problems: 1. not everyone has a NVidia GPU at home (myself included, sadly); 2. The CNN needs to be trained every time it is used (it's photo to photo style transfer).

So, what would be a good framework to implement the CNN for training (targeting desktop only)? I thought about using OpenGL, but I don't know if using GLSL shaders would be a good fit for …

framework gpu machinelearning networks neural networks