/*
 * $Id: MetaFont.java 4784 2011-03-15 08:33:00Z blowagie $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2011 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf.codec.wmf;
import com.itextpdf.text.Document;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.Font;
import com.itextpdf.text.FontFactory;
import com.itextpdf.text.pdf.BaseFont;

public class MetaFont extends MetaObject {
    static final String fontNames[] = {
        "Courier", "Courier-Bold", "Courier-Oblique", "Courier-BoldOblique",
        "Helvetica", "Helvetica-Bold", "Helvetica-Oblique", "Helvetica-BoldOblique",
        "Times-Roman", "Times-Bold", "Times-Italic", "Times-BoldItalic",
        "Symbol", "ZapfDingbats"};

    static final int MARKER_BOLD = 1;
    static final int MARKER_ITALIC = 2;
    static final int MARKER_COURIER = 0;
    static final int MARKER_HELVETICA = 4;
    static final int MARKER_TIMES = 8;
    static final int MARKER_SYMBOL = 12;

    static final int DEFAULT_PITCH = 0;
    static final int FIXED_PITCH = 1;
    static final int VARIABLE_PITCH = 2;
    static final int FF_DONTCARE = 0;
    static final int FF_ROMAN = 1;
    static final int FF_SWISS = 2;
    static final int FF_MODERN = 3;
    static final int FF_SCRIPT = 4;
    static final int FF_DECORATIVE = 5;
    static final int BOLDTHRESHOLD = 600;    
    static final int nameSize = 32;
    static final int ETO_OPAQUE = 2;
    static final int ETO_CLIPPED = 4;

    int height;
    float angle;
    int bold;
    int italic;
    boolean underline;
    boolean strikeout;
    int charset;
    int pitchAndFamily;
    String faceName = "arial";
    BaseFont font = null;

    public MetaFont() {
        type = META_FONT;
    }

    public void init(InputMeta in) throws IOException {
        height = Math.abs(in.readShort());
        in.skip(2);
        angle = (float)(in.readShort() / 1800.0 * Math.PI);
        in.skip(2);
        bold = (in.readShort() >= BOLDTHRESHOLD ? MARKER_BOLD : 0);
        italic = (in.readByte() != 0 ? MARKER_ITALIC : 0);
        underline = (in.readByte() != 0);
        strikeout = (in.readByte() != 0);
        charset = in.readByte();
        in.skip(3);
        pitchAndFamily = in.readByte();
        byte name[] = new byte[nameSize];
        int k;
        for (k = 0; k < nameSize; ++k) {
            int c = in.readByte();
            if (c == 0) {
                break;
            }
            name[k] = (byte)c;
        }
        try {
            faceName = new String(name, 0, k, "Cp1252");
        }
        catch (UnsupportedEncodingException e) {
            faceName = new String(name, 0, k);
        }
        faceName = faceName.toLowerCase();
    }
    
    public BaseFont getFont() {
        if (font != null)
            return font;
        Font ff2 = FontFactory.getFont(faceName, BaseFont.CP1252, true, 10, ((italic != 0) ? Font.ITALIC : 0) | ((bold != 0) ? Font.BOLD : 0));
        font = ff2.getBaseFont();
        if (font != null)
            return font;
        String fontName;
        if (faceName.indexOf("courier") != -1 || faceName.indexOf("terminal") != -1
            || faceName.indexOf("fixedsys") != -1) {
            fontName = fontNames[MARKER_COURIER + italic + bold];
        }
        else if (faceName.indexOf("ms sans serif") != -1 || faceName.indexOf("arial") != -1
            || faceName.indexOf("system") != -1) {
            fontName = fontNames[MARKER_HELVETICA + italic + bold];
        }
        else if (faceName.indexOf("arial black") != -1) {
            fontName = fontNames[MARKER_HELVETICA + italic + MARKER_BOLD];
        }
        else if (faceName.indexOf("times") != -1 || faceName.indexOf("ms serif") != -1
            || faceName.indexOf("roman") != -1) {
            fontName = fontNames[MARKER_TIMES + italic + bold];
        }
        else if (faceName.indexOf("symbol") != -1) {
            fontName = fontNames[MARKER_SYMBOL];
        }
        else {
            int pitch = pitchAndFamily & 3;
            int family = (pitchAndFamily >> 4) & 7;
            switch (family) {
                case FF_MODERN:
                    fontName = fontNames[MARKER_COURIER + italic + bold];
                    break;
                case FF_ROMAN:
                    fontName = fontNames[MARKER_TIMES + italic + bold];
                    break;
                case FF_SWISS:
                case FF_SCRIPT:
                case FF_DECORATIVE:
                    fontName = fontNames[MARKER_HELVETICA + italic + bold];
                    break;
                default:
                {
                    switch (pitch) {
                        case FIXED_PITCH:
                            fontName = fontNames[MARKER_COURIER + italic + bold];
                            break;
                        default:
                            fontName = fontNames[MARKER_HELVETICA + italic + bold];
                            break;
                    }
                }
            }
        }
        try {
            font = BaseFont.createFont(fontName, "Cp1252", false);
        }
        catch (Exception e) {
            throw new ExceptionConverter(e);
        }
        
        return font;
    }
    
    public float getAngle() {
        return angle;
    }
    
    public boolean isUnderline() {
        return underline;
    }
    
    public boolean isStrikeout() {
        return strikeout;
    }
    
    public float getFontSize(MetaState state) {
        return Math.abs(state.transformY(height) - state.transformY(0)) * Document.wmfFontCorrection;
    }
}