cairoCreate
.cairoGetTarget(cr)
cr
Cairo
] a cairo contextCairoSurface
] the target surface. To
keep a reference to it, you must call cairoSurfaceReference
.cr
is already in an error state,
(ie. cairoStatus
!=
CAIRO_STATUS_SUCCESS
).
A nil surface is indicated by cairoSurfaceStatus
!=
CAIRO_STATUS_SUCCESS
.