JDK8/Java8源码在线阅读
/*
* Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
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*/
package sun.awt;
import java.awt.RenderingHints;
import java.lang.annotation.Native;
/**
* This class contains rendering hints that can be used by the
* {@link java.awt.Graphics2D} class, and classes that implement
* {@link java.awt.image.BufferedImageOp} and
* {@link java.awt.image.Raster}.
*/
public class SunHints {
/**
* Defines the type of all keys used to control various
* aspects of the rendering and imaging pipelines. Instances
* of this class are immutable and unique which means that
* tests for matches can be made using the == operator instead
* of the more expensive equals() method.
*/
public static class Key extends RenderingHints.Key {
String description;
/**
* Construct a key using the indicated private key. Each
* subclass of Key maintains its own unique domain of integer
* keys. No two objects with the same integer key and of the
* same specific subclass can be constructed. An exception
* will be thrown if an attempt is made to construct another
* object of a given class with the same integer key as a
* pre-existing instance of that subclass of Key.
*/
public Key(int privatekey, String description) {
super(privatekey);
this.description = description;
}
/**
* Returns the numeric index associated with this Key. This
* is useful for use in switch statements and quick lookups
* of the setting of a particular key.
*/
public final int getIndex() {
return intKey();
}
/**
* Returns a string representation of the Key.
*/
public final String toString() {
return description;
}
/**
* Returns true if the specified object is a valid value
* for this Key.
*/
public boolean isCompatibleValue(Object val) {
if (val instanceof Value) {
return ((Value)val).isCompatibleKey(this);
}
return false;
}
}
/**
* Defines the type of all "enumerative" values used to control
* various aspects of the rendering and imaging pipelines. Instances
* of this class are immutable and unique which means that
* tests for matches can be made using the == operator instead
* of the more expensive equals() method.
*/
public static class Value {
private SunHints.Key myKey;
private int index;
private String description;
private static Value[][] ValueObjects =
new Value[NUM_KEYS][VALS_PER_KEY];
private synchronized static void register(SunHints.Key key,
Value value) {
int kindex = key.getIndex();
int vindex = value.getIndex();
if (ValueObjects[kindex][vindex] != null) {
throw new InternalError("duplicate index: "+vindex);
}
ValueObjects[kindex][vindex] = value;
}
public static Value get(int keyindex, int valueindex) {
return ValueObjects[keyindex][valueindex];
}
/**
* Construct a value using the indicated private index. Each
* subclass of Value maintains its own unique domain of integer
* indices. Enforcing the uniqueness of the integer indices
* is left to the subclass.
*/
public Value(SunHints.Key key, int index, String description) {
this.myKey = key;
this.index = index;
this.description = description;
register(key, this);
}
/**
* Returns the numeric index associated with this Key. This
* is useful for use in switch statements and quick lookups
* of the setting of a particular key.
*/
public final int getIndex() {
return index;
}
/**
* Returns a string representation of this Value.
*/
public final String toString() {
return description;
}
/**
* Returns true if the specified object is a valid Key
* for this Value.
*/
public final boolean isCompatibleKey(Key k) {
return myKey == k;
}
/**
* The hash code for all SunHints.Value objects will be the same
* as the system identity code of the object as defined by the
* System.identityHashCode() method.
*/
public final int hashCode() {
return System.identityHashCode(this);
}
/**
* The equals method for all SunHints.Value objects will return
* the same result as the equality operator '=='.
*/
public final boolean equals(Object o) {
return this == o;
}
}
private static final int NUM_KEYS = 10;
private static final int VALS_PER_KEY = 8;
/**
* Rendering hint key and values
*/
@Native public static final int INTKEY_RENDERING = 0;
@Native public static final int INTVAL_RENDER_DEFAULT = 0;
@Native public static final int INTVAL_RENDER_SPEED = 1;
@Native public static final int INTVAL_RENDER_QUALITY = 2;
/**
* Antialiasing hint key and values
*/
@Native public static final int INTKEY_ANTIALIASING = 1;
@Native public static final int INTVAL_ANTIALIAS_DEFAULT = 0;
@Native public static final int INTVAL_ANTIALIAS_OFF = 1;
@Native public static final int INTVAL_ANTIALIAS_ON = 2;
/**
* Text antialiasing hint key and values
*/
@Native public static final int INTKEY_TEXT_ANTIALIASING = 2;
@Native public static final int INTVAL_TEXT_ANTIALIAS_DEFAULT = 0;
@Native public static final int INTVAL_TEXT_ANTIALIAS_OFF = 1;
@Native public static final int INTVAL_TEXT_ANTIALIAS_ON = 2;
@Native public static final int INTVAL_TEXT_ANTIALIAS_GASP = 3;
@Native public static final int INTVAL_TEXT_ANTIALIAS_LCD_HRGB = 4;
@Native public static final int INTVAL_TEXT_ANTIALIAS_LCD_HBGR = 5;
@Native public static final int INTVAL_TEXT_ANTIALIAS_LCD_VRGB = 6;
@Native public static final int INTVAL_TEXT_ANTIALIAS_LCD_VBGR = 7;
/**
* Font fractional metrics hint key and values
*/
@Native public static final int INTKEY_FRACTIONALMETRICS = 3;
@Native public static final int INTVAL_FRACTIONALMETRICS_DEFAULT = 0;
@Native public static final int INTVAL_FRACTIONALMETRICS_OFF = 1;
@Native public static final int INTVAL_FRACTIONALMETRICS_ON = 2;
/**
* Dithering hint key and values
*/
@Native public static final int INTKEY_DITHERING = 4;
@Native public static final int INTVAL_DITHER_DEFAULT = 0;
@Native public static final int INTVAL_DITHER_DISABLE = 1;
@Native public static final int INTVAL_DITHER_ENABLE = 2;
/**
* Interpolation hint key and values
*/
@Native public static final int INTKEY_INTERPOLATION = 5;
@Native public static final int INTVAL_INTERPOLATION_NEAREST_NEIGHBOR = 0;
@Native public static final int INTVAL_INTERPOLATION_BILINEAR = 1;
@Native public static final int INTVAL_INTERPOLATION_BICUBIC = 2;
/**
* Alpha interpolation hint key and values
*/
@Native public static final int INTKEY_ALPHA_INTERPOLATION = 6;
@Native public static final int INTVAL_ALPHA_INTERPOLATION_DEFAULT = 0;
@Native public static final int INTVAL_ALPHA_INTERPOLATION_SPEED = 1;
@Native public static final int INTVAL_ALPHA_INTERPOLATION_QUALITY = 2;
/**
* Color rendering hint key and values
*/
@Native public static final int INTKEY_COLOR_RENDERING = 7;
@Native public static final int INTVAL_COLOR_RENDER_DEFAULT = 0;
@Native public static final int INTVAL_COLOR_RENDER_SPEED = 1;
@Native public static final int INTVAL_COLOR_RENDER_QUALITY = 2;
/**
* Stroke normalization control hint key and values
*/
@Native public static final int INTKEY_STROKE_CONTROL = 8;
@Native public static final int INTVAL_STROKE_DEFAULT = 0;
@Native public static final int INTVAL_STROKE_NORMALIZE = 1;
@Native public static final int INTVAL_STROKE_PURE = 2;
/**
* Image scaling hint key and values
*/
@Native public static final int INTKEY_RESOLUTION_VARIANT = 9;
@Native public static final int INTVAL_RESOLUTION_VARIANT_DEFAULT = 0;
@Native public static final int INTVAL_RESOLUTION_VARIANT_OFF = 1;
@Native public static final int INTVAL_RESOLUTION_VARIANT_ON = 2;
/**
* LCD text contrast control hint key.
* Value is "100" to make discontiguous with the others which
* are all enumerative and are of a different class.
*/
@Native public static final int INTKEY_AATEXT_LCD_CONTRAST = 100;
/**
* Rendering hint key and value objects
*/
public static final Key KEY_RENDERING =
new SunHints.Key(SunHints.INTKEY_RENDERING,
"Global rendering quality key");
public static final Object VALUE_RENDER_SPEED =
new SunHints.Value(KEY_RENDERING,
SunHints.INTVAL_RENDER_SPEED,
"Fastest rendering methods");
public static final Object VALUE_RENDER_QUALITY =
new SunHints.Value(KEY_RENDERING,
SunHints.INTVAL_RENDER_QUALITY,
"Highest quality rendering methods");
public static final Object VALUE_RENDER_DEFAULT =
new SunHints.Value(KEY_RENDERING,
SunHints.INTVAL_RENDER_DEFAULT,
"Default rendering methods");
/**
* Antialiasing hint key and value objects
*/
public static final Key KEY_ANTIALIASING =
new SunHints.Key(SunHints.INTKEY_ANTIALIASING,
"Global antialiasing enable key");
public static final Object VALUE_ANTIALIAS_ON =
new SunHints.Value(KEY_ANTIALIASING,
SunHints.INTVAL_ANTIALIAS_ON,
"Antialiased rendering mode");
public static final Object VALUE_ANTIALIAS_OFF =
new SunHints.Value(KEY_ANTIALIASING,
SunHints.INTVAL_ANTIALIAS_OFF,
"Nonantialiased rendering mode");
public static final Object VALUE_ANTIALIAS_DEFAULT =
new SunHints.Value(KEY_ANTIALIASING,
SunHints.INTVAL_ANTIALIAS_DEFAULT,
"Default antialiasing rendering mode");
/**
* Text antialiasing hint key and value objects
*/
public static final Key KEY_TEXT_ANTIALIASING =
new SunHints.Key(SunHints.INTKEY_TEXT_ANTIALIASING,
"Text-specific antialiasing enable key");
public static final Object VALUE_TEXT_ANTIALIAS_ON =
new SunHints.Value(KEY_TEXT_ANTIALIASING,
SunHints.INTVAL_TEXT_ANTIALIAS_ON,
"Antialiased text mode");
public static final Object VALUE_TEXT_ANTIALIAS_OFF =
new SunHints.Value(KEY_TEXT_ANTIALIASING,
SunHints.INTVAL_TEXT_ANTIALIAS_OFF,
"Nonantialiased text mode");
public static final Object VALUE_TEXT_ANTIALIAS_DEFAULT =
new SunHints.Value(KEY_TEXT_ANTIALIASING,
SunHints.INTVAL_TEXT_ANTIALIAS_DEFAULT,
"Default antialiasing text mode");
public static final Object VALUE_TEXT_ANTIALIAS_GASP =
new SunHints.Value(KEY_TEXT_ANTIALIASING,
SunHints.INTVAL_TEXT_ANTIALIAS_GASP,
"gasp antialiasing text mode");
public static final Object VALUE_TEXT_ANTIALIAS_LCD_HRGB =
new SunHints.Value(KEY_TEXT_ANTIALIASING,
SunHints.INTVAL_TEXT_ANTIALIAS_LCD_HRGB,
"LCD HRGB antialiasing text mode");
public static final Object VALUE_TEXT_ANTIALIAS_LCD_HBGR =
new SunHints.Value(KEY_TEXT_ANTIALIASING,
SunHints.INTVAL_TEXT_ANTIALIAS_LCD_HBGR,
"LCD HBGR antialiasing text mode");
public static final Object VALUE_TEXT_ANTIALIAS_LCD_VRGB =
new SunHints.Value(KEY_TEXT_ANTIALIASING,
SunHints.INTVAL_TEXT_ANTIALIAS_LCD_VRGB,
"LCD VRGB antialiasing text mode");
public static final Object VALUE_TEXT_ANTIALIAS_LCD_VBGR =
new SunHints.Value(KEY_TEXT_ANTIALIASING,
SunHints.INTVAL_TEXT_ANTIALIAS_LCD_VBGR,
"LCD VBGR antialiasing text mode");
/**
* Font fractional metrics hint key and value objects
*/
public static final Key KEY_FRACTIONALMETRICS =
new SunHints.Key(SunHints.INTKEY_FRACTIONALMETRICS,
"Fractional metrics enable key");
public static final Object VALUE_FRACTIONALMETRICS_ON =
new SunHints.Value(KEY_FRACTIONALMETRICS,
SunHints.INTVAL_FRACTIONALMETRICS_ON,
"Fractional text metrics mode");
public static final Object VALUE_FRACTIONALMETRICS_OFF =
new SunHints.Value(KEY_FRACTIONALMETRICS,
SunHints.INTVAL_FRACTIONALMETRICS_OFF,
"Integer text metrics mode");
public static final Object VALUE_FRACTIONALMETRICS_DEFAULT =
new SunHints.Value(KEY_FRACTIONALMETRICS,
SunHints.INTVAL_FRACTIONALMETRICS_DEFAULT,
"Default fractional text metrics mode");
/**
* Dithering hint key and value objects
*/
public static final Key KEY_DITHERING =
new SunHints.Key(SunHints.INTKEY_DITHERING,
"Dithering quality key");
public static final Object VALUE_DITHER_ENABLE =
new SunHints.Value(KEY_DITHERING,
SunHints.INTVAL_DITHER_ENABLE,
"Dithered rendering mode");
public static final Object VALUE_DITHER_DISABLE =
new SunHints.Value(KEY_DITHERING,
SunHints.INTVAL_DITHER_DISABLE,
"Nondithered rendering mode");
public static final Object VALUE_DITHER_DEFAULT =
new SunHints.Value(KEY_DITHERING,
SunHints.INTVAL_DITHER_DEFAULT,
"Default dithering mode");
/**
* Interpolation hint key and value objects
*/
public static final Key KEY_INTERPOLATION =
new SunHints.Key(SunHints.INTKEY_INTERPOLATION,
"Image interpolation method key");
public static final Object VALUE_INTERPOLATION_NEAREST_NEIGHBOR =
new SunHints.Value(KEY_INTERPOLATION,
SunHints.INTVAL_INTERPOLATION_NEAREST_NEIGHBOR,
"Nearest Neighbor image interpolation mode");
public static final Object VALUE_INTERPOLATION_BILINEAR =
new SunHints.Value(KEY_INTERPOLATION,
SunHints.INTVAL_INTERPOLATION_BILINEAR,
"Bilinear image interpolation mode");
public static final Object VALUE_INTERPOLATION_BICUBIC =
new SunHints.Value(KEY_INTERPOLATION,
SunHints.INTVAL_INTERPOLATION_BICUBIC,
"Bicubic image interpolation mode");
/**
* Alpha interpolation hint key and value objects
*/
public static final Key KEY_ALPHA_INTERPOLATION =
new SunHints.Key(SunHints.INTKEY_ALPHA_INTERPOLATION,
"Alpha blending interpolation method key");
public static final Object VALUE_ALPHA_INTERPOLATION_SPEED =
new SunHints.Value(KEY_ALPHA_INTERPOLATION,
SunHints.INTVAL_ALPHA_INTERPOLATION_SPEED,
"Fastest alpha blending methods");
public static final Object VALUE_ALPHA_INTERPOLATION_QUALITY =
new SunHints.Value(KEY_ALPHA_INTERPOLATION,
SunHints.INTVAL_ALPHA_INTERPOLATION_QUALITY,
"Highest quality alpha blending methods");
public static final Object VALUE_ALPHA_INTERPOLATION_DEFAULT =
new SunHints.Value(KEY_ALPHA_INTERPOLATION,
SunHints.INTVAL_ALPHA_INTERPOLATION_DEFAULT,
"Default alpha blending methods");
/**
* Color rendering hint key and value objects
*/
public static final Key KEY_COLOR_RENDERING =
new SunHints.Key(SunHints.INTKEY_COLOR_RENDERING,
"Color rendering quality key");
public static final Object VALUE_COLOR_RENDER_SPEED =
new SunHints.Value(KEY_COLOR_RENDERING,
SunHints.INTVAL_COLOR_RENDER_SPEED,
"Fastest color rendering mode");
public static final Object VALUE_COLOR_RENDER_QUALITY =
new SunHints.Value(KEY_COLOR_RENDERING,
SunHints.INTVAL_COLOR_RENDER_QUALITY,
"Highest quality color rendering mode");
public static final Object VALUE_COLOR_RENDER_DEFAULT =
new SunHints.Value(KEY_COLOR_RENDERING,
SunHints.INTVAL_COLOR_RENDER_DEFAULT,
"Default color rendering mode");
/**
* Stroke normalization control hint key and value objects
*/
public static final Key KEY_STROKE_CONTROL =
new SunHints.Key(SunHints.INTKEY_STROKE_CONTROL,
"Stroke normalization control key");
public static final Object VALUE_STROKE_DEFAULT =
new SunHints.Value(KEY_STROKE_CONTROL,
SunHints.INTVAL_STROKE_DEFAULT,
"Default stroke normalization");
public static final Object VALUE_STROKE_NORMALIZE =
new SunHints.Value(KEY_STROKE_CONTROL,
SunHints.INTVAL_STROKE_NORMALIZE,
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