/*

 * Copyright (c) 1998, 2005, 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

 * questions.

 */

package sun.awt;

import java.awt.RenderingHints;

/**

 * 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 = 9;

    private static final int VALS_PER_KEY = 8;

    /**

     * Rendering hint key and values

     */

    public static final int INTKEY_RENDERING = 0;

    public static final int INTVAL_RENDER_DEFAULT = 0;

    public static final int INTVAL_RENDER_SPEED = 1;

    public static final int INTVAL_RENDER_QUALITY = 2;

    /**

     * Antialiasing hint key and values

     */

    public static final int INTKEY_ANTIALIASING = 1;

    public static final int INTVAL_ANTIALIAS_DEFAULT = 0;

    public static final int INTVAL_ANTIALIAS_OFF = 1;

    public static final int INTVAL_ANTIALIAS_ON = 2;

    /**

     * Text antialiasing hint key and values

     */

    public static final int INTKEY_TEXT_ANTIALIASING = 2;

    public static final int INTVAL_TEXT_ANTIALIAS_DEFAULT = 0;

    public static final int INTVAL_TEXT_ANTIALIAS_OFF = 1;

    public static final int INTVAL_TEXT_ANTIALIAS_ON = 2;

    public static final int INTVAL_TEXT_ANTIALIAS_GASP = 3;

    public static final int INTVAL_TEXT_ANTIALIAS_LCD_HRGB = 4;

    public static final int INTVAL_TEXT_ANTIALIAS_LCD_HBGR = 5;

    public static final int INTVAL_TEXT_ANTIALIAS_LCD_VRGB = 6;

    public static final int INTVAL_TEXT_ANTIALIAS_LCD_VBGR = 7;

    /**

     * Font fractional metrics hint key and values

     */

    public static final int INTKEY_FRACTIONALMETRICS = 3;

    public static final int INTVAL_FRACTIONALMETRICS_DEFAULT = 0;

    public static final int INTVAL_FRACTIONALMETRICS_OFF = 1;

    public static final int INTVAL_FRACTIONALMETRICS_ON = 2;

    /**

     * Dithering hint key and values

     */

    public static final int INTKEY_DITHERING = 4;

    public static final int INTVAL_DITHER_DEFAULT = 0;

    public static final int INTVAL_DITHER_DISABLE = 1;

    public static final int INTVAL_DITHER_ENABLE = 2;

    /**

     * Interpolation hint key and values

     */

    public static final int INTKEY_INTERPOLATION = 5;

    public static final int INTVAL_INTERPOLATION_NEAREST_NEIGHBOR = 0;

    public static final int INTVAL_INTERPOLATION_BILINEAR = 1;

    public static final int INTVAL_INTERPOLATION_BICUBIC = 2;

    /**

     * Alpha interpolation hint key and values

     */

    public static final int INTKEY_ALPHA_INTERPOLATION = 6;

    public static final int INTVAL_ALPHA_INTERPOLATION_DEFAULT = 0;

    public static final int INTVAL_ALPHA_INTERPOLATION_SPEED = 1;

    public static final int INTVAL_ALPHA_INTERPOLATION_QUALITY = 2;

    /**

     * Color rendering hint key and values

     */

    public static final int INTKEY_COLOR_RENDERING = 7;

    public static final int INTVAL_COLOR_RENDER_DEFAULT = 0;

    public static final int INTVAL_COLOR_RENDER_SPEED = 1;

    public static final int INTVAL_COLOR_RENDER_QUALITY = 2;

    /**

     * Stroke normalization control hint key and values

     */

    public static final int INTKEY_STROKE_CONTROL = 8;

    public static final int INTVAL_STROKE_DEFAULT = 0;

    public static final int INTVAL_STROKE_NORMALIZE = 1;

    public static final int INTVAL_STROKE_PURE = 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.

     */

    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,

                           "Normalize strokes for consistent rendering");

    public static final Object VALUE_STROKE_PURE =

        new SunHints.Value(KEY_STROKE_CONTROL,

                           SunHints.INTVAL_STROKE_PURE,

                           "Pure stroke conversion for accurate paths");

    public static class LCDContrastKey extends Key {

        public LCDContrastKey(int privatekey, String description) {

            super(privatekey, description);

        }

        /**

         * Returns true if the specified object is a valid value

         * for this Key. The allowable range is 100 to 250.

         */

        public final boolean isCompatibleValue(Object val) {

            if (val instanceof Integer) {

                int ival = ((Integer)val).intValue();

                return ival >= 100 && ival <= 250;

            }

            return false;

        }

    }

    /**

     * LCD text contrast hint key

     */

    public static final RenderingHints.Key

        KEY_TEXT_ANTIALIAS_LCD_CONTRAST =

        new LCDContrastKey(SunHints.INTKEY_AATEXT_LCD_CONTRAST,

                           "Text-specific LCD contrast key");

}