com.itextpdf.text.pdf.Type3Font Maven / Gradle / Ivy
/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2020 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.pdf;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.error_messages.MessageLocalization;
import java.util.HashMap;
/**
* A class to support Type3 fonts.
*/
public class Type3Font extends BaseFont {
private boolean[] usedSlot;
private IntHashtable widths3 = new IntHashtable();
private HashMap char2glyph = new HashMap();
private PdfWriter writer;
private float llx = Float.NaN, lly, urx, ury;
private PageResources pageResources = new PageResources();
private boolean colorized;
/**
* Creates a Type3 font.
* @param writer the writer
* @param chars an array of chars corresponding to the glyphs used (not used, present for compatibility only)
* @param colorized if true the font may specify color, if false no color commands are allowed
* and only images as masks can be used
*/
public Type3Font(PdfWriter writer, char[] chars, boolean colorized) {
this(writer, colorized);
}
/**
* Creates a Type3 font. This implementation assumes that the /FontMatrix is
* [0.001 0 0 0.001 0 0] or a 1000-unit glyph coordinate system.
*
* An example:
*
*
* Document document = new Document(PageSize.A4);
* PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("type3.pdf"));
* document.open();
* Type3Font t3 = new Type3Font(writer, false);
* PdfContentByte g = t3.defineGlyph('a', 1000, 0, 0, 750, 750);
* g.rectangle(0, 0, 750, 750);
* g.fill();
* g = t3.defineGlyph('b', 1000, 0, 0, 750, 750);
* g.moveTo(0, 0);
* g.lineTo(375, 750);
* g.lineTo(750, 0);
* g.fill();
* Font f = new Font(t3, 12);
* document.add(new Paragraph("ababab", f));
* document.close();
*
* @param writer the writer
* @param colorized if true the font may specify color, if false no color commands are allowed
* and only images as masks can be used
*/
public Type3Font(PdfWriter writer, boolean colorized) {
this.writer = writer;
this.colorized = colorized;
fontType = FONT_TYPE_T3;
usedSlot = new boolean[256];
}
/**
* Defines a glyph. If the character was already defined it will return the same content
* @param c the character to match this glyph.
* @param wx the advance this character will have
* @param llx the X lower left corner of the glyph bounding box. If the colorize option is
* true the value is ignored
* @param lly the Y lower left corner of the glyph bounding box. If the colorize option is
* true the value is ignored
* @param urx the X upper right corner of the glyph bounding box. If the colorize option is
* true the value is ignored
* @param ury the Y upper right corner of the glyph bounding box. If the colorize option is
* true the value is ignored
* @return a content where the glyph can be defined
*/
public PdfContentByte defineGlyph(char c, float wx, float llx, float lly, float urx, float ury) {
if (c == 0 || c > 255)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("the.char.1.doesn.t.belong.in.this.type3.font", c));
usedSlot[c] = true;
Integer ck = Integer.valueOf(c);
Type3Glyph glyph = char2glyph.get(ck);
if (glyph != null)
return glyph;
widths3.put(c, (int)wx);
if (!colorized) {
if (Float.isNaN(this.llx)) {
this.llx = llx;
this.lly = lly;
this.urx = urx;
this.ury = ury;
}
else {
this.llx = Math.min(this.llx, llx);
this.lly = Math.min(this.lly, lly);
this.urx = Math.max(this.urx, urx);
this.ury = Math.max(this.ury, ury);
}
}
glyph = new Type3Glyph(writer, pageResources, wx, llx, lly, urx, ury, colorized);
char2glyph.put(ck, glyph);
return glyph;
}
@Override
public String[][] getFamilyFontName() {
return getFullFontName();
}
@Override
public float getFontDescriptor(int key, float fontSize) {
return 0;
}
@Override
public String[][] getFullFontName() {
return new String[][]{{"", "", "", ""}};
}
/**
* @since 2.0.8
*/
@Override
public String[][] getAllNameEntries() {
return new String[][]{{"4", "", "", "", ""}};
}
@Override
public int getKerning(int char1, int char2) {
return 0;
}
@Override
public String getPostscriptFontName() {
return "";
}
@Override
protected int[] getRawCharBBox(int c, String name) {
return null;
}
@Override
int getRawWidth(int c, String name) {
return 0;
}
@Override
public boolean hasKernPairs() {
return false;
}
@Override
public boolean setKerning(int char1, int char2, int kern) {
return false;
}
@Override
public void setPostscriptFontName(String name) {
}
@Override
void writeFont(PdfWriter writer, PdfIndirectReference ref, Object[] params) throws com.itextpdf.text.DocumentException, java.io.IOException {
if (this.writer != writer)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("type3.font.used.with.the.wrong.pdfwriter"));
// Get first & lastchar ...
int firstChar = 0;
while( firstChar < usedSlot.length && !usedSlot[firstChar] ) firstChar++;
if ( firstChar == usedSlot.length ) {
throw new DocumentException(MessageLocalization.getComposedMessage("no.glyphs.defined.for.type3.font"));
}
int lastChar = usedSlot.length - 1;
while( lastChar >= firstChar && !usedSlot[lastChar] ) lastChar--;
int[] widths = new int[lastChar - firstChar + 1];
int[] invOrd = new int[lastChar - firstChar + 1];
int invOrdIndx = 0, w = 0;
for( int u = firstChar; u<=lastChar; u++, w++ ) {
if ( usedSlot[u] ) {
invOrd[invOrdIndx++] = u;
widths[w] = widths3.get(u);
}
}
PdfArray diffs = new PdfArray();
PdfDictionary charprocs = new PdfDictionary();
int last = -1;
for (int k = 0; k < invOrdIndx; ++k) {
int c = invOrd[k];
if (c > last) {
last = c;
diffs.add(new PdfNumber(last));
}
++last;
int c2 = invOrd[k];
String s = GlyphList.unicodeToName(c2);
if (s == null)
s = "a" + c2;
PdfName n = new PdfName(s);
diffs.add(n);
Type3Glyph glyph = char2glyph.get(Integer.valueOf(c2));
PdfStream stream = new PdfStream(glyph.toPdf(null));
stream.flateCompress(compressionLevel);
PdfIndirectReference refp = writer.addToBody(stream).getIndirectReference();
charprocs.put(n, refp);
}
PdfDictionary font = new PdfDictionary(PdfName.FONT);
font.put(PdfName.SUBTYPE, PdfName.TYPE3);
if (colorized)
font.put(PdfName.FONTBBOX, new PdfRectangle(0, 0, 0, 0));
else
font.put(PdfName.FONTBBOX, new PdfRectangle(llx, lly, urx, ury));
font.put(PdfName.FONTMATRIX, new PdfArray(new float[]{0.001f, 0, 0, 0.001f, 0, 0}));
font.put(PdfName.CHARPROCS, writer.addToBody(charprocs).getIndirectReference());
PdfDictionary encoding = new PdfDictionary();
encoding.put(PdfName.DIFFERENCES, diffs);
font.put(PdfName.ENCODING, writer.addToBody(encoding).getIndirectReference());
font.put(PdfName.FIRSTCHAR, new PdfNumber(firstChar));
font.put(PdfName.LASTCHAR, new PdfNumber(lastChar));
font.put(PdfName.WIDTHS, writer.addToBody(new PdfArray(widths)).getIndirectReference());
if (pageResources.hasResources())
font.put(PdfName.RESOURCES, writer.addToBody(pageResources.getResources()).getIndirectReference());
writer.addToBody(font, ref);
}
/**
* Always returns null, because you can't get the FontStream of a Type3 font.
* @return null
* @since 2.1.3
*/
@Override
public PdfStream getFullFontStream() {
return null;
}
@Override
public byte[] convertToBytes(String text) {
char[] cc = text.toCharArray();
byte[] b = new byte[cc.length];
int p = 0;
for (int k = 0; k < cc.length; ++k) {
char c = cc[k];
if (charExists(c))
b[p++] = (byte)c;
}
if (b.length == p)
return b;
byte[] b2 = new byte[p];
System.arraycopy(b, 0, b2, 0, p);
return b2;
}
@Override
byte[] convertToBytes(int char1) {
if (charExists(char1))
return new byte[]{(byte)char1};
else return new byte[0];
}
@Override
public int getWidth(int char1) {
if (!widths3.containsKey(char1))
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("the.char.1.is.not.defined.in.a.type3.font", char1));
return widths3.get(char1);
}
@Override
public int getWidth(String text) {
char[] c = text.toCharArray();
int total = 0;
for (int k = 0; k < c.length; ++k)
total += getWidth(c[k]);
return total;
}
@Override
public int[] getCharBBox(int c) {
return null;
}
@Override
public boolean charExists(int c) {
if (c > 0 && c < 256) {
return usedSlot[c];
} else {
return false;
}
}
@Override
public boolean setCharAdvance(int c, int advance) {
return false;
}
}