| cairo-cairo-surface-t {RGtk2} | R Documentation |
Base class for surfaces
cairoSurfaceCreateSimilar(other, content, width, height)
cairoSurfaceReference(surface)
cairoSurfaceDestroy(surface)
cairoSurfaceStatus(surface)
cairoSurfaceFinish(surface)
cairoSurfaceFlush(surface)
cairoSurfaceGetFontOptions(surface)
cairoSurfaceGetContent(surface)
cairoSurfaceMarkDirty(surface)
cairoSurfaceMarkDirtyRectangle(surface, x, y, width, height)
cairoSurfaceSetDeviceOffset(surface, x.offset, y.offset)
cairoSurfaceGetDeviceOffset(surface)
cairoSurfaceSetFallbackResolution(surface, x.pixels.per.inch, y.pixels.per.inch)
cairoSurfaceGetType(surface)
cairoSurfaceSetUserData(surface, key, user.data)
cairoSurfaceGetUserData(surface, key)
cairoSurfaceCopyPage(surface)
cairoSurfaceShowPage(surface)
cairoSurface(width, height, format, other, content, data, stride, filename, con)
CairoSurface is the abstract type representing all different drawing
targets that cairo can render to. The actual drawings are
performed using a cairo context.
A cairo surface is created by using backend-specific
constructors, typically of the form
cairo_backendsurfaceCreate().
CairoSurfaceCairoSurface represents an image, either as the destination
of a drawing operation or as source when drawing onto another
surface. To draw to a CairoSurface, create a cairo context
with the surface as the target, using cairoCreate.
There are different subtypes of CairoSurface for
different drawing backends; for example, cairoImageSurfaceCreate
creates a bitmap image in memory.
The type of a surface can be queried with cairoSurfaceGetType.
Memory management of CairoSurface is done with
cairoSurfaceReference and cairoSurfaceDestroy.
cairoSurface is the result of collapsing the constructors of cairo_surface_t (cairoSurfaceCreateSimilar, cairoImageSurfaceCreate, cairoImageSurfaceCreateForData, cairoImageSurfaceCreateFromPng, cairoImageSurfaceCreateFromPngStream) and accepts a subset of its arguments matching the required arguments of one of its delegate constructors.
CairoContentCairoContent is used to describe the content that a surface will
contain, whether color information, alpha information (translucence
vs. opacity), or both.
Note: The large values here are designed to keep CairoContent
values distinct from CairoFormat values so that the
implementation can detect the error if users confuse the two types.
coloralphacolor-alpha
CairoSurfaceTypeCairoSurfaceType is used to describe the type of a given
surface. The surface types are also known as "backends" or "surface
backends" within cairo.
The type of a surface is determined by the function used to create
it, which will generally be of the form cairo_typesurfaceCreate(),
(though see cairoSurfaceCreateSimilar as well).
The surface type can be queried with cairoSurfaceGetType
The various CairoSurface functions can be used with surfaces of
any type, but some backends also provide type-specific functions
that must only be called with a surface of the appropriate
type. These functions have names that begin with
cairo_type_surface such as cairoImageSurfaceGetWidth.
The behavior of calling a type-specific function with a surface of the wrong type is undefined.
New entries may be added in future versions.
Since 1.2
imagepdfpsxlibxcbglitzquartzwin32beosdirectfbsvg
Derived by RGtkGen from GTK+ documentation
http://www.cairographics.org/manual/cairo-cairo-surface-t.html