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- /*
- * 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.afp.goca;
-
- import java.awt.Color;
- import java.awt.color.ColorSpace;
- import java.io.DataOutput;
- import java.io.IOException;
- import java.io.OutputStream;
-
- 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, CMYK = 0x04, 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();
- byte[] colsizes;
- if (colSpaceType == ColorSpace.TYPE_CMYK) {
- colspace = CMYK;
- colsizes = new byte[] {0x08, 0x08, 0x08, 0x08};
- for (int i = 0; i < colorComponents.length; i++) {
- baout.write(Math.round(colorComponents[i] * 255));
- }
- } else if (colSpaceType == ColorSpace.TYPE_RGB) {
- colspace = RGB;
- colsizes = new byte[] {0x08, 0x08, 0x08, 0x00};
- for (int i = 0; i < colorComponents.length; i++) {
- baout.write(Math.round(colorComponents[i] * 255));
- }
- } else if (cs instanceof CIELabColorSpace) {
- colspace = CIELAB;
- colsizes = new byte[] {0x08, 0x08, 0x08, 0x00};
- DataOutput dout = new java.io.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 {
- 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);
- }
-
- /** {@inheritDoc} */
- @Override
- public String toString() {
- return "GraphicsSetProcessColor(col=" + color + ")";
- }
- }
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