org.jpedal.color.DeviceGrayColorSpace Maven / Gradle / Ivy

/*
 * ===========================================
 * 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
 *
     This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


 *
 * ---------------
 * DeviceGrayColorSpace.java
 * ---------------
 */
package org.jpedal.color;

import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;


/**
 * handle GrayColorSpace
 */
public class DeviceGrayColorSpace extends GenericColorSpace {

    private static final long serialVersionUID = -8160089076145994695L;

    public DeviceGrayColorSpace() {
        setType(ColorSpaces.DeviceGray);
        cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
    }

    /**
     * set  color (in terms of rgb)
     */
    @Override
    public final void setColor(final String[] number_values, final int opCount) {

        final float[] colValues = new float[1];
        colValues[0] = Float.parseFloat(number_values[0]);

        setColor(colValues, 1);
    }

    /**
     * set color from grayscale values
     */
    @Override
    public final void setColor(final float[] operand, final int length) {

        int val;
        final float tmp = operand[0];

        //handle float or int
        if (tmp <= 1) {
            val = (int) (255 * tmp);
        } else {
            val = (int) (tmp);
        }

        //allow for bum values
        if (val < 0) {
            val = 0;
        }

        this.currentColor = new PdfColor(val, val, val);

    }

    /**
     * create rgb version of gray
     */
    @Override
    public byte[] dataToRGBByteArray(final byte[] data, final int w, final int h) {

        final int size = data.length;
        final byte[] newData = new byte[size * 3];
        int ptr = 0;

        for (int a = 0; a < size; a++) {
            for (int comp = 0; comp < 3; comp++) {
                newData[ptr] = data[a];
                ptr++;
            }
        }

        return newData;
    }

    /**
     * convert Index to RGB
     */
    @Override
    public byte[] convertIndexToRGB(final byte[] index) {

        isConverted = true;

        final int count = index.length;
        final byte[] newIndex = new byte[count * 3];

        for (int i = 0; i < count; i++) {
            final byte value = index[i];
            for (int j = 0; j < 3; j++) {
                newIndex[(i * 3) + j] = value;
            }

        }

        return newIndex;
    }

    /**
     * convert data stream to srgb image
     */
    @Override
    public BufferedImage JPEGToRGBImage(final byte[] data, final int w, final int h, final int pX, final int pY) {

        return JPEGDecoder.grayJPEGToRGBImage(data, pX, pY);

    }
}