Where does that number come from? You already have a macOS version, so your app should already be ported to OpenGL. But even if you aren't sure if it'll work or not, you could do a crowdfunding campaign, which will also let you know if enough people and businesses are interested. Linux community is known for supporting crowdfunding campaigns and startups, why not try it? It has a potential of being the first fully-featured professional photo-editing software on Linux.