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Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id: GraphicsSetProcessColor.java 1761020 2016-09-16 11:17:35Z ssteiner $ */
package org.apache.fop.afp.goca;
import java.awt.Color;
import java.awt.color.ColorSpace;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.xmlgraphics.java2d.color.CIELabColorSpace;
import org.apache.xmlgraphics.java2d.color.ColorUtil;
import org.apache.xmlgraphics.java2d.color.ColorWithAlternatives;
/**
* Sets the current processing color for the following GOCA structured fields
*/
public class GraphicsSetProcessColor extends AbstractGraphicsDrawingOrder {
/*
* GOCA Color space support:
* X'01' RGB
* X'04' CMYK
* X'06' Highlight color space
* X'08' CIELAB
* X'40' Standard OCA color space
*/
private static final byte RGB = 0x01;
private static final byte CMYK = 0x04;
private static final byte CIELAB = 0x08;
private final Color color;
private final int componentsSize;
/**
* Main constructor
*
* @param color the color to set
*/
public GraphicsSetProcessColor(Color color) {
if (color instanceof ColorWithAlternatives) {
ColorWithAlternatives cwa = (ColorWithAlternatives)color;
Color alt = cwa.getFirstAlternativeOfType(ColorSpace.TYPE_CMYK);
if (alt != null) {
this.color = alt;
this.componentsSize = 4;
return;
}
}
ColorSpace cs = color.getColorSpace();
int colSpaceType = cs.getType();
if (colSpaceType == ColorSpace.TYPE_CMYK) {
this.color = color;
} else if (cs instanceof CIELabColorSpace) {
//TODO Convert between illuminants if not D50 according to rendering intents
//Right now, we're assuming D50 as the GOCA spec requires.
this.color = color;
//16bit components didn't work, and 8-bit sadly has reduced accuracy.
} else {
if (!color.getColorSpace().isCS_sRGB()) {
this.color = ColorUtil.toSRGBColor(color);
} else {
this.color = color;
}
}
this.componentsSize = this.color.getColorSpace().getNumComponents();
}
/** {@inheritDoc} */
public int getDataLength() {
return 12 + this.componentsSize;
}
/** {@inheritDoc} */
@Override
byte getOrderCode() {
return (byte) 0xB2;
}
/** {@inheritDoc} */
public void writeToStream(OutputStream os) throws IOException {
float[] colorComponents = color.getColorComponents(null);
// COLSPCE
byte colspace;
ColorSpace cs = color.getColorSpace();
int colSpaceType = cs.getType();
ByteArrayOutputStream baout = new ByteArrayOutputStream();
DataOutputStream dout = null;
byte[] colsizes;
if (colSpaceType == ColorSpace.TYPE_CMYK) {
colspace = CMYK;
colsizes = new byte[] {0x08, 0x08, 0x08, 0x08};
for (float colorComponent : colorComponents) {
baout.write(Math.round(colorComponent * 255));
}
} else if (colSpaceType == ColorSpace.TYPE_RGB) {
colspace = RGB;
colsizes = new byte[] {0x08, 0x08, 0x08, 0x00};
for (float colorComponent : colorComponents) {
baout.write(Math.round(colorComponent * 255));
}
} else if (cs instanceof CIELabColorSpace) {
colspace = CIELAB;
colsizes = new byte[] {0x08, 0x08, 0x08, 0x00};
dout = new DataOutputStream(baout);
//According to GOCA, I'd expect the multiplicator below to be 255f, not 100f
//But only IBM AFP Workbench seems to support Lab colors and it requires "c * 100f"
int l = Math.round(colorComponents[0] * 100f);
int a = Math.round(colorComponents[1] * 255f) - 128;
int b = Math.round(colorComponents[2] * 255f) - 128;
dout.writeByte(l);
dout.writeByte(a);
dout.writeByte(b);
} else {
IOUtils.closeQuietly(baout);
throw new IllegalStateException();
}
int len = getDataLength();
byte[] data = new byte[12];
data[0] = getOrderCode(); // GSPCOL order code
data[1] = (byte) (len - 2); // LEN
data[2] = 0x00; // reserved; must be zero
data[3] = colspace; // COLSPCE
data[4] = 0x00; // reserved; must be zero
data[5] = 0x00; // reserved; must be zero
data[6] = 0x00; // reserved; must be zero
data[7] = 0x00; // reserved; must be zero
data[8] = colsizes[0]; // COLSIZE(S)
data[9] = colsizes[1];
data[10] = colsizes[2];
data[11] = colsizes[3];
os.write(data);
baout.writeTo(os);
IOUtils.closeQuietly(dout);
IOUtils.closeQuietly(baout);
}
/** {@inheritDoc} */
@Override
public String toString() {
return "GraphicsSetProcessColor(col=" + color + ")";
}
}