Here is the methods that are not supported yet:
framebufferRenderbuffergetFramebufferAttachmentParameterbindRenderbuffercreateRenderbufferdeleteRenderbuffergetRenderbufferParameterrenderbufferStoragecompressedTexImage2DcompressedTexSubImage2DgetTexParametertexSubImage2DgetUniformgetVertexAttribgetVertexAttribOffsetHere is the methods that are partially supported:
texImage2D : works with a few formats only (refer to current implementation). You might want to use rngl.loadTexture to load images/camera/videos/whatever textures.