Module org.freedesktop.cairo

Package org.freedesktop.cairo

Enum Class Antialias

java.lang.Object

java.lang.Enum<Antialias>

org.freedesktop.cairo.Antialias

All Implemented Interfaces:

Serializable, Comparable<Antialias>, Constable

public enum Antialias
extends Enum<Antialias>

Specifies the type of antialiasing to do when rendering text or shapes.

As it is not necessarily clear from the above what advantages a particular antialias method provides, since 1.12, there is also a set of hints:

• CAIRO_ANTIALIAS_FAST : Allow the backend to degrade raster quality for speed
• CAIRO_ANTIALIAS_GOOD : A balance between speed and quality
• CAIRO_ANTIALIAS_BEST : A high-fidelity, but potentially slow, raster mode

These make no guarantee on how the backend will perform its rasterisation (if it even rasterises!), nor that they have any differing effect other than to enable some form of antialiasing. In the case of glyph rendering, CAIRO_ANTIALIAS_FAST and CAIRO_ANTIALIAS_GOOD will be mapped to CAIRO_ANTIALIAS_GRAY, with CAIRO_ANTALIAS_BEST being equivalent to CAIRO_ANTIALIAS_SUBPIXEL.

The interpretation of CAIRO_ANTIALIAS_DEFAULT is left entirely up to the backend, typically this will be similar to CAIRO_ANTIALIAS_GOOD.

Since:

1.0

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
BEST	Hint that the backend should render at the highest quality, sacrificing speed if necessary
DEFAULT	Use the default antialiasing for the subsystem and target device
FAST	Hint that the backend should perform some antialiasing but prefer speed over quality
GOOD	The backend should balance quality against performance
GRAY	Perform single-color antialiasing (using shades of gray for black text on a white background, for example)
NONE	Use a bilevel alpha mask
SUBPIXEL	Perform antialiasing by taking advantage of the order of subpixel elements on devices such as LCD panels

Method Summary

Modifier and Type	Method	Description
static org.gnome.glib.Type	getType()	Get the CairoAntialias GType
int	getValue()	Return the value of this enum
static Antialias	of(int ordinal)	Returns the enum constant for the given ordinal (its position in the enum declaration).
static Antialias	valueOf(String name)	Returns the enum constant of this class with the specified name.
static Antialias[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

DEFAULT

public static final Antialias DEFAULT

Use the default antialiasing for the subsystem and target device

Since:

1.0

NONE

public static final Antialias NONE

Use a bilevel alpha mask

Since:

1.0

GRAY

public static final Antialias GRAY

Perform single-color antialiasing (using shades of gray for black text on a white background, for example)

Since:

1.0

SUBPIXEL

public static final Antialias SUBPIXEL

Perform antialiasing by taking advantage of the order of subpixel elements on devices such as LCD panels

Since:

1.0

FAST

public static final Antialias FAST

Hint that the backend should perform some antialiasing but prefer speed over quality

Since:

1.12

GOOD

public static final Antialias GOOD

The backend should balance quality against performance

Since:

1.12

BEST

public static final Antialias BEST

Hint that the backend should render at the highest quality, sacrificing speed if necessary

Since:

1.12

Method Details

values

public static Antialias[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static Antialias valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

getValue

public int getValue()

Return the value of this enum

Returns:

the value

of

public static Antialias of(int ordinal)

Returns the enum constant for the given ordinal (its position in the enum declaration).

Parameters:

ordinal - the position in the enum declaration, starting from zero

Returns:

the enum constant for the given ordinal

getType

public static org.gnome.glib.Type getType()

Get the CairoAntialias GType

Returns:

the GType