render: split module into gfx_apis and renderer

src/tree/float.rs

@@ -3,9 +3,10 @@ use {
         backend::KeyState,
         cursor::KnownCursor,
         fixed::Fixed,
+        gfx_apis::gl::Texture,
         ifs::wl_seat::{NodeSeatState, SeatId, WlSeatGlobal, BTN_LEFT},
         rect::Rect,
-        render::{Renderer, Texture},
+        renderer::Renderer,
         scale::Scale,
         state::State,
         text,