org.jpedal.fonts.tt.Hhea Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of OpenViewerFX Show documentation
Open Source (LGPL) JavaFX PDF Viewer
There is a newer version: 7.15.25
/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
 @LICENSE@
 *
 * ---------------
 * Hhea.java
 * ---------------
 */
package org.jpedal.fonts.tt;


public class Hhea extends Table {

    public static final int VERSION = 0;
    public static final int ASCENDER = 1;
    public static final int DESCENDER = 2;
    public static final int LINEGAP = 3;
    public static final int ADVANCEWIDTHMAX = 4;
    public static final int MINIMUMLEFTSIDEBEARING = 5;
    public static final int MINIMUMRIGHTSIDEBEARING = 6;
    public static final int XMAXEXTENT = 7;
    public static final int CARETSLOPERISING = 8;
    public static final int CARETSLOPERUN = 9;
    public static final int CARETOFFSET = 10;
    public static final int METRICDATAFORMAT = 11;
    public static final int NUMBEROFMETRICS = 12;

    private int version = 65536;
    private int ascender = 1;
    private int descender = -1;
    private int lineGap;
    private int advancedWidthMax;
    private int minimumLeftSideBearing;
    private int minimumRightSideBearing;
    private int xMaxExtent;
    private int caretSlopeRise;
    private int caretSlopeRun;
    private int caretOffset;
    private int metricDataFormat;
    private int numberOfHMetrics;

    public Hhea(final FontFile2 currentFontFile) {

        //move to start and check exists
        final int startPointer = currentFontFile.selectTable(FontFile2.HHEA);

        //read 'head' table
        if (startPointer != 0) {

            version = currentFontFile.getNextUint32(); //version 65536
            ascender = currentFontFile.getFWord(); //ascender  1972
            descender = currentFontFile.getFWord(); //descender -483
            lineGap = currentFontFile.getFWord(); //lineGap 0
            advancedWidthMax = currentFontFile.readUFWord(); //advanceWidthMax  2513
            minimumLeftSideBearing = currentFontFile.getFWord(); //minLeftSideBearing  -342
            minimumRightSideBearing = currentFontFile.getFWord(); //minRightSideBearing  -340
            xMaxExtent = currentFontFile.getFWord(); //xMaxExtent      2454
            caretSlopeRise = currentFontFile.getNextInt16(); //caretSlopeRise 1
            caretSlopeRun = currentFontFile.getNextInt16(); //caretSlopeRun   0
            caretOffset = currentFontFile.getFWord(); //caretOffset          0

            //reserved values
            for (int i = 0; i < 4; i++) {
                currentFontFile.getNextUint16(); //0
            }

            metricDataFormat = currentFontFile.getNextInt16(); //metricDataFormat
            numberOfHMetrics = currentFontFile.getNextUint16(); //261

        }
    }

    public Hhea() {
    }

    public int getNumberOfHMetrics() {
        return numberOfHMetrics;
    }

    /**
     * returns the value of given int number of variable
     *
     * @param key is the key value
     * @return value of the variable
     */
    public int getIntValue(final int key) {
        switch (key) {
            case VERSION:
                return version;
            case ASCENDER:
                return ascender;
            case DESCENDER:
                return descender;
            case LINEGAP:
                return lineGap;
            case ADVANCEWIDTHMAX:
                return advancedWidthMax;
            case MINIMUMLEFTSIDEBEARING:
                return minimumLeftSideBearing;
            case MINIMUMRIGHTSIDEBEARING:
                return minimumRightSideBearing;
            case XMAXEXTENT:
                return xMaxExtent;
            case CARETSLOPERISING:
                return caretSlopeRise;
            case CARETSLOPERUN:
                return caretSlopeRun;
            case CARETOFFSET:
                return caretOffset;
            case METRICDATAFORMAT:
                return metricDataFormat;
            case NUMBEROFMETRICS:
                return numberOfHMetrics;
            default:
                return 0;
        }
    }

}