/*
 Copyright (C) 2002-2006 Stephane Meslin-Weber <steph@tangency.co.uk>
 All rights reserved.
 
 This file is part of Odonata.
 
 Odonata is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 Odonata 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 for more details.

 You should have received a copy of the GNU General Public License
 along with GNU Classpath; see the file COPYING.  If not, write to
 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301 USA.

 Linking this library statically or dynamically with other modules is
 making a combined work based on this library.  Thus, the terms and
 conditions of the GNU General Public License cover the whole
 combination.

 As a special exception, the copyright holders of this library give you
 permission to link this library with independent modules to produce an
 executable, regardless of the license terms of these independent
 modules, and to copy and distribute the resulting executable under
 terms of your choice, provided that you also meet, for each linked
 independent module, the terms and conditions of the license of that
 module.  An independent module is a module which is not derived from
 or based on this library.  If you modify this library, you may extend
 this exception to your version of the library, but you are not
 obligated to do so.  If you do not wish to do so, delete this
 exception statement from your version. 
*/
package org.jnode.font.bdf;


/**
 * Represents a single font Glyph.
 * @author Stephane Meslin-Weber
 */
public class BDFGlyph {
	public String name;
	public BDFParser.Rectangle bbx = new BDFParser.Rectangle();
	public int[] data;
    public StringBuffer rawData;
	private BDFFontContainer font;

    /**
     * Decodes a BDF font BITMAP/ENDCHAR sequence of packed bits.
     * @param depth bits per pixel from parent font
     * @param data bit data encoded in text bytes
     * @return raw bit values
     */
    public int[] decode(int depth, StringBuffer data) {
        int[] result = new int[(data.length()/2)*(8 / depth)];

        for (int i = 0, offset=0; i < data.length(); i+=2,offset+=(8 / depth)) {
            String cut = data.substring(i, i+2);
            int value = Integer.parseInt(cut,16);

            int bits[] = null;

            //
            // Bit long, and not optimised...
            //
            switch(depth) {
            case 1:
                bits = new int[] {
                    (value & 0x80) >> 7,
                    (value & 0x40) >> 6,
                    (value & 0x20) >> 5,
                    (value & 0x10) >> 4,
                    (value & 0x08) >> 3,
                    (value & 0x04) >> 2,
                    (value & 0x02) >> 1,
                    (value & 0x01),
                };
                break;
            case 2:
                bits = new int[] {
                    (value & 0xC0) >> 6,
                    (value & 0x30) >> 4,
                    (value & 0x0C) >> 2,
                    (value & 0x03),
                };
                break;
            case 4:
                bits = new int[] {
                    (value & 0xF0) >> 4,
                    (value & 0x0F),
                };
                break;
            case 8:
                bits = new int[] {
                    value & 0xFF,
                };
                break;
            }

            for(int k=0;k<bits.length;k++)
                result[offset+k] = bits[k];
        }

        return result;
    }

	public BDFParser.Rectangle getBbx() {
		return new BDFParser.Rectangle(bbx);
	}

    public BDFParser.Rectangle getBbx(BDFParser.Rectangle rec) {
        rec.x = bbx.x;
        rec.y = bbx.y;
        rec.width = bbx.width;
        rec.height = bbx.height;
        return rec;
	}

    void init(BDFFontContainer font) {
        this.font = font;
        this.data = decode(getFont().getDepth(), rawData);
        rawData = null;
    }

	public void setBbx(BDFParser.Rectangle bbx) {
		this.bbx = bbx;
	}

	public int[] getData() {
		return data;
	}

    public void setRawData(StringBuffer rawData) {
        this.rawData = rawData;
    }

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public BDFFontContainer getFont() {
		return font;
	}

	public BDFGlyph(String name) {
		this.name = name;
	}

	public void setSWidth(int swx0, int swy0) {
//		System.err.println("SWidth: "+swx0+","+swy0);
	}

	private BDFParser.Dimension dsize = new BDFParser.Dimension();
	public void setDWidth(int dwx0, int dwy0) {
		dsize.setSize(dwx0,dwy0);
	}

    public BDFParser.Dimension getDWidth() {
        return dsize;
    }

	public void setBBX(int x, int y, int width, int height) {
		bbx.setBounds(x, y, width, height);
	}

    public String toString() {
        return "BDFGlyph[name="+name+", bbx="+bbx+", dsize="+dsize+"]";
    }
}