/*
* 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: MapCodedFont.java 985571 2010-08-14 19:28:26Z jeremias $ */
package org.apache.fop.afp.modca;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.List;
import org.apache.fop.afp.AFPConstants;
import org.apache.fop.afp.fonts.AFPFont;
import org.apache.fop.afp.fonts.CharacterSet;
import org.apache.fop.afp.fonts.DoubleByteFont;
import org.apache.fop.afp.fonts.FontRuntimeException;
import org.apache.fop.afp.fonts.OutlineFont;
import org.apache.fop.afp.fonts.RasterFont;
import org.apache.fop.afp.util.BinaryUtils;
/**
* The Map Coded Font structured field maps a unique coded font resource local
* ID, which may be embedded one or more times within an object's data and
* descriptor, to the identifier of a coded font resource object. Additionally,
* the Map Coded Font structured field specifies a set of resource attributes
* for the coded font.
*/
public class MapCodedFont extends AbstractStructuredObject {
/** the collection of map coded fonts (maximum of 254) */
private final List/*<FontDefinition>*/ fontList
= new java.util.ArrayList/*<FontDefinition>*/();
/**
* Main constructor
*/
public MapCodedFont() {
}
/** {@inheritDoc} */
public void writeToStream(OutputStream os) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] startData = new byte[9];
copySF(startData, Type.MAP, Category.CODED_FONT);
baos.write(startData);
Iterator iter = fontList.iterator();
while (iter.hasNext()) {
FontDefinition fd = (FontDefinition) iter.next();
// Start of repeating groups (occurs 1 to 254)
baos.write(0x00);
if (fd.scale == 0) {
// Raster Font
baos.write(0x22); // Length of 34
} else {
// Outline Font
baos.write(0x3A); // Length of 58
}
// Font Character Set Name Reference
baos.write(0x0C); //TODO Relax requirement for 8 chars in the name
baos.write(0x02);
baos.write((byte) 0x86);
baos.write(0x00);
baos.write(fd.characterSet);
// Font Code Page Name Reference
baos.write(0x0C); //TODO Relax requirement for 8 chars in the name
baos.write(0x02);
baos.write((byte) 0x85);
baos.write(0x00);
baos.write(fd.codePage);
//TODO idea: for CIDKeyed fonts, maybe hint at Unicode encoding with X'50' triplet
//to allow font substitution.
// Character Rotation
baos.write(0x04);
baos.write(0x26);
baos.write(fd.orientation);
baos.write(0x00);
// Resource Local Identifier
baos.write(0x04);
baos.write(0x24);
baos.write(0x05);
baos.write(fd.fontReferenceKey);
if (fd.scale != 0) {
// Outline Font (triplet '1F')
baos.write(0x14);
baos.write(0x1F);
baos.write(0x00);
baos.write(0x00);
baos.write(BinaryUtils.convert(fd.scale, 2)); // Height
baos.write(new byte[] {0x00, 0x00}); // Width
baos.write(new byte[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00});
baos.write(0x60);
// Outline Font (triplet '5D')
baos.write(0x04);
baos.write(0x5D);
baos.write(BinaryUtils.convert(fd.scale, 2));
}
}
byte[] data = baos.toByteArray();
// Set the total record length
byte[] rl1 = BinaryUtils.convert(data.length - 1, 2);
data[1] = rl1[0];
data[2] = rl1[1];
os.write(data);
}
/**
* Add a font definition on the the map coded font object.
*
* @param fontReference
* the font number used as the resource identifier
* @param font
* the font
* @param size
* the size of the font
* @param orientation
* the orientation of the font
* @throws MaximumSizeExceededException if the maximum number of fonts have been exceeded
*/
public void addFont(int fontReference, AFPFont font, int size, int orientation)
throws MaximumSizeExceededException {
FontDefinition fontDefinition = new FontDefinition();
fontDefinition.fontReferenceKey = BinaryUtils.convert(fontReference)[0];
switch (orientation) {
case 90:
fontDefinition.orientation = 0x2D;
break;
case 180:
fontDefinition.orientation = 0x5A;
break;
case 270:
fontDefinition.orientation = (byte) 0x87;
break;
default:
fontDefinition.orientation = 0x00;
break;
}
try {
if (font instanceof RasterFont) {
RasterFont raster = (RasterFont) font;
CharacterSet cs = raster.getCharacterSet(size);
if (cs == null) {
String msg = "Character set not found for font "
+ font.getFontName() + " with point size " + size;
LOG.error(msg);
throw new FontRuntimeException(msg);
}
fontDefinition.characterSet = cs.getNameBytes();
if (fontDefinition.characterSet.length != 8) {
throw new IllegalArgumentException("The character set "
+ new String(fontDefinition.characterSet,
AFPConstants.EBCIDIC_ENCODING)
+ " must have a fixed length of 8 characters.");
}
fontDefinition.codePage = cs.getCodePage().getBytes(
AFPConstants.EBCIDIC_ENCODING);
if (fontDefinition.codePage.length != 8) {
throw new IllegalArgumentException("The code page "
+ new String(fontDefinition.codePage,
AFPConstants.EBCIDIC_ENCODING)
+ " must have a fixed length of 8 characters.");
}
} else if (font instanceof OutlineFont) {
OutlineFont outline = (OutlineFont) font;
CharacterSet cs = outline.getCharacterSet();
fontDefinition.characterSet = cs.getNameBytes();
// There are approximately 72 points to 1 inch or 20 1440ths per point.
fontDefinition.scale = 20 * size / 1000;
fontDefinition.codePage = cs.getCodePage().getBytes(
AFPConstants.EBCIDIC_ENCODING);
if (fontDefinition.codePage.length != 8) {
throw new IllegalArgumentException("The code page "
+ new String(fontDefinition.codePage,
AFPConstants.EBCIDIC_ENCODING)
+ " must have a fixed length of 8 characters.");
}
} else if (font instanceof DoubleByteFont) {
DoubleByteFont outline = (DoubleByteFont) font;
CharacterSet cs = outline.getCharacterSet();
fontDefinition.characterSet = cs.getNameBytes();
// There are approximately 72 points to 1 inch or 20 1440ths per point.
fontDefinition.scale = 20 * size / 1000;
fontDefinition.codePage = cs.getCodePage().getBytes(
AFPConstants.EBCIDIC_ENCODING);
//TODO Relax requirement for 8 characters
if (fontDefinition.codePage.length != 8) {
throw new IllegalArgumentException("The code page "
+ new String(fontDefinition.codePage,
AFPConstants.EBCIDIC_ENCODING)
+ " must have a fixed length of 8 characters.");
}
} else {
String msg = "Font of type " + font.getClass().getName()
+ " not recognized.";
LOG.error(msg);
throw new FontRuntimeException(msg);
}
if (fontList.size() > 253) {
// Throw an exception if the size is exceeded
throw new MaximumSizeExceededException();
} else {
fontList.add(fontDefinition);
}
} catch (UnsupportedEncodingException ex) {
throw new FontRuntimeException("Failed to create font "
+ " due to a UnsupportedEncodingException", ex);
}
}
/**
* Private utility class used as a container for font attributes
*/
private static final class FontDefinition {
private FontDefinition() {
}
/**
* The code page of the font
*/
private byte[] codePage;
/**
* The character set of the font
*/
private byte[] characterSet;
/**
* The font reference key
*/
private byte fontReferenceKey;
/**
* The orientation of the font
*/
private byte orientation;
/**
* The scale (only specified for outline fonts)
*/
private int scale = 0;
}
}