d4bcca19da
We need three independent sources to support indirect SSBO writes (as well as textures with both LOD/bias and offsets). Now is a good time to make sources just an array so we don't have to rewrite a ton of code if we ever needed a fourth source for some reason. Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>