XLib-XRender Backend

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

Synopsis

#define             CAIRO_HAS_XLIB_XRENDER_SURFACE
cairo_surface_t *   cairo_xlib_surface_create_with_xrender_format
                                                        (Display *dpy,
                                                         Drawable drawable,
                                                         Screen *screen,
                                                         XRenderPictFormat *format,
                                                         int width,
                                                         int height);
XRenderPictFormat * cairo_xlib_surface_get_xrender_format
                                                        (cairo_surface_t *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.

Details

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

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.

`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.

`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

			Cairo: A Vector Graphics Library
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