## XLib Backend

XLib Backend —

## Synopsis

    cairo_surface_t* cairo_xlib_surface_create  (Display *dpy,
                                                 Drawable drawable,
                                                 Visual *visual,
                                                 int width,
                                                 int height);
    cairo_surface_t* cairo_xlib_surface_create_for_bitmap
                                                (Display *dpy,
                                                 Pixmap bitmap,
                                                 int width,
                                                 int height);
    void        cairo_xlib_surface_set_size     (cairo_surface_t *surface,
                                                 int width,
                                                 int height);

## Description

## Details

### cairo_xlib_surface_create ()

    cairo_surface_t* cairo_xlib_surface_create  (Display *dpy,
                                                 Drawable drawable,
                                                 Visual *visual,
                                                 int width,
                                                 int height);

Creates an Xlib surface that draws to the given drawable. The way that colors are represented in the drawable is specified by the provided visual.

NOTE: If `drawable` is a Window, then the function cairo_xlib_surface_set_size must be called whenever the size of the window changes.

`dpy` : | an X Display
`drawable` : | an X Drawable, (a Pixmap or a Window)
`visual` : | the visual to use for drawing to `drawable`. The depth of the visual must match the depth of the drawable. Currently, only TrueColor visuals are fully supported.
`width` : | the current width of `drawable`.
`height` : | the current height of `drawable`.
Returns : | the newly created surface

### cairo_xlib_surface_create_for_bitmap ()

    cairo_surface_t* cairo_xlib_surface_create_for_bitmap
                                                (Display *dpy,
                                                 Pixmap bitmap,
                                                 int width,
                                                 int height);

Creates an Xlib surface that draws to the given bitmap. This will be drawn to as a CAIRO_FORMAT_A1 object.

`dpy` : | an X Display
`bitmap` : | an X Drawable, (a depth-1 Pixmap)
`width` : | the current width of `bitmap`.
`height` : | the current height of `bitmap`.
Returns : | the newly created surface

### cairo_xlib_surface_set_size ()

    void        cairo_xlib_surface_set_size     (cairo_surface_t *surface,
                                                 int width,
                                                 int height);

Informs cairo of the new size of the X Drawable underlying the surface. For a surface created for a Window (rather than a Pixmap), this function must be called each time the size of the window changes. (For a subwindow, you are normally resizing the window yourself, but for a toplevel window, it is necessary to listen for ConfigureNotify events.)

A Pixmap can never change size, so it is never necessary to call this function on a surface created for a Pixmap.

`surface` : | a cairo_surface_t for the XLib backend
`width` : | the new width of the surface
`height` : | the new height of the surface