### Signal

# Gdk Surface::render

since: 4.0

#### Declaration

    gboolean
    render (
      GdkSurface* self,
      cairo_region_t* region,
      gpointer user_data
    )

#### Description [src]

Emitted when part of the surface needs to be redrawn.

Default handler: The default handler is called after the handlers added via `g_signal_connect()`.
Available since: 4.0

#### Parameters

`region`

  Type: `cairo_region_t`

  The region that needs to be redrawn.

  The data is owned by the caller of the function.

#### Return value

Type: `gboolean`

`TRUE` to indicate that the signal has been handled.