Multi-User Surfaces!

src/openperipheral/core/adapter/AdapterGlassesBridge.java

@@ -88,5 +88,14 @@ public String getGuid(IComputerAccess computer, TileEntityGlassesBridge bridge)
 	public int getStringWidth(IComputerAccess computer, TileEntityGlassesBridge bridge, String text) {
 		return bridge.getStringWidth(text);
 	}
+
+	@LuaMethod(
+	        returnType = LuaType.OBJECT, onTick = false, description = "Get the surface of a user to draw privately on their screen",
+	        args = {
+	                @Arg(name = "username", description = "The username of the user to get the draw surface for", type = LuaType.STRING)
+	        })
+	public ILuaObject getUserSurface(IComputerAccess computer, TileEntityGlassesBridge bridge, String username) {
+	    return bridge.getUserSurface(username);
+	}
 
 }

src/openperipheral/core/interfaces/ISurface.java

@@ -0,0 +1,28 @@
+package openperipheral.core.interfaces;
+
+import dan200.computer.api.ILuaObject;
+
+public interface ISurface {
+
+    public abstract Short getKeyForDrawable(IDrawable d);
+
+    public abstract void setDeleted(IDrawable d);
+
+    public abstract void markChanged(IDrawable d, int slot);
+
+    public abstract ILuaObject addBox(int x, int y, int width, int height,
+            int color, double alpha) throws InterruptedException;
+
+    public abstract ILuaObject addGradientBox(int x, int y, int width,
+            int height, int color, double alpha, int color2, double alpha2,
+            byte gradient) throws InterruptedException;
+
+    public abstract ILuaObject getById(int id);
+
+    public abstract ILuaObject addText(int x, int y, String text, int color);
+
+    public abstract Short[] getAllIds();
+
+    public abstract void clear();
+
+}