XLib-XRender Backend: Cairo: A Vector Graphics Library

XLib-XRender Backend

XLib-XRender Backend — X Window System rendering using XLib and the X Render extension

Functions

cairo_surface_t *	cairo_xlib_surface_create_with_xrender_format ()
XRenderPictFormat *	cairo_xlib_surface_get_xrender_format ()

Types and Values

#define

CAIRO_HAS_XLIB_XRENDER_SURFACE

Description

The XLib surface is used to render cairo graphics to X Window System windows and pixmaps using the XLib and Xrender libraries.

Note that the XLib surface automatically takes advantage of X Render extension if it is available.

Functions

cairo_xlib_surface_create_with_xrender_format ()

cairo_surface_t *
cairo_xlib_surface_create_with_xrender_format
                               (Display *dpy,
                                Drawable drawable,
                                Screen *screen,
                                XRenderPictFormat *format,
                                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 picture format.

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

Parameters

dpy	an X Display
drawable	an X Drawable, (a Pixmap or a Window)
screen	the X Screen associated with `drawable`
format	the picture format to use for drawing to `drawable` . The depth of `format` must match the depth of the drawable.
width	the current width of `drawable` .
height	the current height of `drawable` .

Returns

the newly created surface

Since: 1.0

cairo_xlib_surface_get_xrender_format ()

XRenderPictFormat *
cairo_xlib_surface_get_xrender_format (cairo_surface_t *surface);

Gets the X Render picture format that surface uses for rendering with the X Render extension. If the surface was created by cairo_xlib_surface_create_with_xrender_format() originally, the return value is the format passed to that constructor.

Parameters

surface

an xlib surface

Returns

the XRenderPictFormat* associated with surface , or NULL if the surface is not an xlib surface or if the X Render extension is not available.

Since: 1.6

Types and Values

CAIRO_HAS_XLIB_XRENDER_SURFACE

#define CAIRO_HAS_XLIB_XRENDER_SURFACE 1

Defined if the XLib/XRender surface functions are available. This macro can be used to conditionally compile backend-specific code.

Since: 1.6