org.jpedal.color.CalGrayColorSpace Maven / Gradle / Ivy
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/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/java-pdf-library-support/
*
* (C) Copyright 1997-2013, IDRsolutions and Contributors.
*
* This file is part of JPedal
*
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(float[] whitepoint, float[] blackpoint, float[] gamma) {
this.componentCount = 1;
setCIEValues(whitepoint, blackpoint, null, null, gamma);
this.value = ColorSpaces.CalGray;
}
/**
* set CalGray color (in terms of rgb)
*/
@Override
final public void setColor(String[] number_values, int opCount) {
float[] colValues = new float[1];
colValues[0] = Float.parseFloat(number_values[0]);
setColor(colValues, 1);
}
/**
* set CalGray color (in terms of rgb)
*/
@Override
final public void setColor(float[] number_values, int opCount) {
float A = number_values[0];
// standard calculate (see pdf spec 1.3 page 170)
float[] values = new float[3];
float AG = (float) Math.pow(A, this.G[0]);
values[0] = ((this.W[0]) * AG);
values[1] = ((this.W[1]) * AG);
values[2] = (this.W[2] * AG);
// convert to rgb
values = this.cs.toRGB(values);
// set color
this.currentColor = new PdfColor(values[0], values[1], values[2]);
}
}