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XLib-XRender Backend

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

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Functions

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jpayne@68: cairo_surface_t * jpayne@68: jpayne@68: cairo_xlib_surface_create_with_xrender_format () jpayne@68:
jpayne@68: XRenderPictFormat * jpayne@68: jpayne@68: cairo_xlib_surface_get_xrender_format () jpayne@68:
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Types and Values

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#defineCAIRO_HAS_XLIB_XRENDER_SURFACE
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Description

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The XLib surface is used to render cairo graphics to X Window System jpayne@68: windows and pixmaps using the XLib and Xrender libraries.

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Note that the XLib surface automatically takes advantage of X Render extension jpayne@68: if it is available.

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Functions

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cairo_xlib_surface_create_with_xrender_format ()

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cairo_surface_t *
jpayne@68: cairo_xlib_surface_create_with_xrender_format
jpayne@68:                                (Display *dpy,
jpayne@68:                                 Drawable drawable,
jpayne@68:                                 Screen *screen,
jpayne@68:                                 XRenderPictFormat *format,
jpayne@68:                                 int width,
jpayne@68:                                 int height);
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Creates an Xlib surface that draws to the given drawable. jpayne@68: The way that colors are represented in the drawable is specified jpayne@68: by the provided picture format.

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Note: If drawable jpayne@68: is a Window, then the function jpayne@68: cairo_xlib_surface_set_size() must be called whenever the size of the jpayne@68: window changes.

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Parameters

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dpy

an X Display

 

drawable

an X Drawable, (a Pixmap or a Window)

 

screen

the X Screen associated with drawable jpayne@68:

 

format

the picture format to use for drawing to drawable jpayne@68: . The depth jpayne@68: of format jpayne@68: must match the depth of the drawable.

 

width

the current width of drawable jpayne@68: .

 

height

the current height of drawable jpayne@68: .

 
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Returns

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the newly created surface

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Since: 1.0

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cairo_xlib_surface_get_xrender_format ()

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XRenderPictFormat *
jpayne@68: cairo_xlib_surface_get_xrender_format (cairo_surface_t *surface);
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Gets the X Render picture format that surface jpayne@68: uses for rendering with the jpayne@68: X Render extension. If the surface was created by jpayne@68: cairo_xlib_surface_create_with_xrender_format() originally, the return jpayne@68: value is the format passed to that constructor.

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Parameters

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surface

an xlib surface

 
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Returns

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the XRenderPictFormat* associated with surface jpayne@68: , jpayne@68: or NULL if the surface is not an xlib surface jpayne@68: or if the X Render extension is not available.

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Since: 1.6

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Types and Values

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CAIRO_HAS_XLIB_XRENDER_SURFACE

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#define CAIRO_HAS_XLIB_XRENDER_SURFACE 1
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Defined if the XLib/XRender surface functions are available. jpayne@68: This macro can be used to conditionally compile backend-specific code.

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Since: 1.6

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See Also

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cairo_surface_t

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