CAIRO_HAS_XLIB_SURFACE

#define CAIRO_HAS_XLIB_SURFACE 1

Defined if the Xlib surface backend is available. This macro can be used to conditionally compile backend-specific code.

Since 1.0

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.

When drawable is a Window containing child windows then drawing to the created surface will be clipped by those child windows. When the created surface is used as a source, the contents of the children will be included.

Since 1.0

cairo_xlib_surface_create_for_bitmap ()

cairo_surface_t *   cairo_xlib_surface_create_for_bitmap
                                                        (Display *dpy,
                                                         Pixmap bitmap,
                                                         Screen *screen,
                                                         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.

Since 1.0

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.

Since 1.0

cairo_xlib_surface_get_display ()

Display *           cairo_xlib_surface_get_display      (cairo_surface_t *surface);

Get the X Display for the underlying X Drawable.

Since 1.2

cairo_xlib_surface_get_screen ()

Screen *            cairo_xlib_surface_get_screen       (cairo_surface_t *surface);

Get the X Screen for the underlying X Drawable.

Since 1.2

cairo_xlib_surface_set_drawable ()

void                cairo_xlib_surface_set_drawable     (cairo_surface_t *surface,
                                                         Drawable drawable,
                                                         int width,
                                                         int height);

Informs cairo of a new X Drawable underlying the surface. The drawable must match the display, screen and format of the existing drawable or the application will get X protocol errors and will probably terminate. No checks are done by this function to ensure this compatibility.

Since 1.0

cairo_xlib_surface_get_drawable ()

Drawable            cairo_xlib_surface_get_drawable     (cairo_surface_t *surface);

Get the underlying X Drawable used for the surface.

Since 1.2

cairo_xlib_surface_get_visual ()

Visual *            cairo_xlib_surface_get_visual       (cairo_surface_t *surface);

Gets the X Visual associated with surface, suitable for use with the underlying X Drawable. If surface was created by cairo_xlib_surface_create(), the return value is the Visual passed to that constructor.

Since 1.2

cairo_xlib_surface_get_width ()

int                 cairo_xlib_surface_get_width        (cairo_surface_t *surface);

Get the width of the X Drawable underlying the surface in pixels.

Since 1.2

cairo_xlib_surface_get_height ()

int                 cairo_xlib_surface_get_height       (cairo_surface_t *surface);

Get the height of the X Drawable underlying the surface in pixels.

Since 1.2

cairo_xlib_surface_get_depth ()

int                 cairo_xlib_surface_get_depth        (cairo_surface_t *surface);

Get the number of bits used to represent each pixel value.

Since 1.2

cairo_xlib_device_debug_cap_xrender_version ()

void                cairo_xlib_device_debug_cap_xrender_version
                                                        (cairo_device_t *device,
                                                         int major_version,
                                                         int minor_version);

Restricts all future Xlib surfaces for this devices to the specified version of the RENDER extension. This function exists solely for debugging purpose. It let's you find out how cairo would behave with an older version of the RENDER extension.

Use the special values -1 and -1 for disabling the RENDER extension.

Since 1.12

cairo_xlib_device_debug_get_precision ()

int                 cairo_xlib_device_debug_get_precision
                                                        (cairo_device_t *device);

Get the Xrender precision mode.

Since 1.12

cairo_xlib_device_debug_set_precision ()

void                cairo_xlib_device_debug_set_precision
                                                        (cairo_device_t *device,
                                                         int precision);

Render supports two modes of precision when rendering trapezoids. Set the precision to the desired mode.

Since 1.12