org.jpedal.color.CalGrayColorSpace 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 1997-2016 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
*
* ---------------
* CalGrayColorSpace.java
* ---------------
*/
package org.jpedal.color;
/**
* handle Java version of CalGrayColorSpace in PDF
*/
public class CalGrayColorSpace extends GenericColorSpace {
private static final long serialVersionUID = -6459433440483127497L;
public CalGrayColorSpace(final float[] whitepoint, final float[] gamma) {
componentCount=1;
setCIEValues(whitepoint,null,null,null,gamma);
setType(ColorSpaces.CalGray);
}
/**
* set CalGray 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 CalGray color (in terms of rgb)
*/
@Override
public final void setColor(final float[] number_values, final int opCount) {
final float A = number_values[0];
//standard calculate (see pdf spec 1.3 page 170)
float[] values = new float[3];
final float AG = (float) Math.pow(A, G[0]);
// values[0] = (B[0]);
values[0] = ((W[0]) * AG);
values[1] = ((W[1]) * AG);
values[2] = (W[2] * AG);
//convert to rgb
values = cs.toRGB(values);
//set color
this.currentColor= new PdfColor(values[0],values[1],values[2]);
}
}