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Java™ Binding for the OpenGL® API
There is a newer version: 2.3.2
/**
 * Copyright 2010 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of JogAmp Community.
 */
package com.jogamp.graph.font;

import com.jogamp.opengl.math.geom.AABBox;

/**
 * Interface wrapper for font implementation.
 * 
 * TrueType Font Specification:
 *   http://developer.apple.com/fonts/ttrefman/rm06/Chap6.html
 *   
 * TrueType Font Table Introduction:
 *   http://scripts.sil.org/cms/scripts/page.php?item_id=IWS-Chapter08
 */

public interface Font {

    /** font name indices for name table */
    public static final int NAME_COPYRIGHT = 0;
    public static final int NAME_FAMILY = 1;
    public static final int NAME_SUBFAMILY = 2;
    public static final int NAME_UNIQUNAME = 3;
    public static final int NAME_FULLNAME = 4;
    public static final int NAME_VERSION = 5;
    public static final int NAME_MANUFACTURER = 8;
    public static final int NAME_DESIGNER = 9;
    
    
    /**
     * Metrics for font
     * 
     * Depending on the font's direction, horizontal or vertical,
     * the following tables shall be used:
     * 
     * Vertical http://developer.apple.com/fonts/TTRefMan/RM06/Chap6vhea.html
     * Horizontal http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html
     */
    public interface Metrics {  
        float getAscent(float pixelSize);
        float getDescent(float pixelSize);
        float getLineGap(float pixelSize);
        float getMaxExtend(float pixelSize);        
        float getScale(float pixelSize);
        AABBox getBBox(float pixelSize);
    }

    /**
     * Glyph for font
     */
    public interface Glyph {
        // reserved special glyph IDs 
        // http://scripts.sil.org/cms/scripts/page.php?item_id=IWS-Chapter08#ba57949e
        public static final int ID_UNKNOWN = 0;
        public static final int ID_CR = 2;
        public static final int ID_SPACE = 3;
                
        public Font getFont();
        public char getSymbol();
        public AABBox getBBox(float pixelSize);
        public float getAdvance(float pixelSize, boolean useFrationalMetrics);
    }


    public String getName(int nameIndex);
    public StringBuilder getName(StringBuilder string, int nameIndex);
    
    /** Shall return the family and subfamily name, separated a dash.
     * {@link #getName(StringBuilder, int)} w/ {@link #NAME_FAMILY} and {@link #NAME_SUBFAMILY}
     * Example: "{@code Ubuntu-Regular}"  */
    public StringBuilder getFullFamilyName(StringBuilder buffer);
    
    public StringBuilder getAllNames(StringBuilder string, String separator);
    
    public float getAdvanceWidth(int i, float pixelSize);
    public Metrics getMetrics();
    public Glyph getGlyph(char symbol);
    public int getNumGlyphs();
    
    public float getStringWidth(CharSequence string, float pixelSize);
    public float getStringHeight(CharSequence string, float pixelSize);
    public AABBox getStringBounds(CharSequence string, float pixelSize);
    
    public boolean isPrintableChar( char c );  
    
    /** Shall return {@link #getFullFamilyName()} */
    public String toString();
}