public void AddTexture( double dx, double dy, double width, double height, Int64 textureId, bool freeze) { if (current_layer_ == null) { return; } var layer = new TextureLayer(); layer.set_offset(new SKPoint((float)dx, (float)dy)); layer.set_size(new SKSize((float)width, (float)height)); layer.set_texture_id((ulong)textureId); layer.set_freeze(freeze); current_layer_.Add(layer); }