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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2018 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.kernel.font;
import com.itextpdf.io.source.ByteUtils;
import com.itextpdf.kernel.PdfException;
import com.itextpdf.io.image.ImageData;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfStream;
import com.itextpdf.kernel.pdf.xobject.PdfXObject;
/**
* The content where Type3 glyphs are written to.
*/
public final class Type3Glyph extends PdfCanvas {
private static final String D_0_STR = "d0\n";
private static final String D_1_STR = "d1\n";
private static final byte[] d0 = ByteUtils.getIsoBytes(D_0_STR);
private static final byte[] d1 = ByteUtils.getIsoBytes(D_1_STR);
private static final long serialVersionUID = 5811604071799271336L;
private float wx;
private float llx;
private float lly;
private float urx;
private float ury;
private boolean isColor = false;
/**
* Creates a Type3Glyph canvas with a new Content Stream.
*
* @param pdfDocument the document that this canvas is created for
*/
Type3Glyph(PdfDocument pdfDocument, float wx, float llx, float lly, float urx, float ury, boolean isColor) {
super((PdfStream)new PdfStream().makeIndirect(pdfDocument), null, pdfDocument);
writeMetrics(wx, llx, lly, urx, ury, isColor);
}
/**
* Creates a Type3Glyph canvas with a non-empty Content Stream.
*
* @param pdfStream {@code PdfStream} from existed document.
* @param document document to which {@code PdfStream} belongs.
*/
Type3Glyph(PdfStream pdfStream, PdfDocument document) {
super(pdfStream, null, document);
if (pdfStream.getBytes() != null) {
fillBBFromBytes(pdfStream.getBytes());
}
}
public float getWx() {
return wx;
}
public float getLlx() {
return llx;
}
public float getLly() {
return lly;
}
public float getUrx() {
return urx;
}
public float getUry() {
return ury;
}
/**
* Indicates if the glyph color specified in the glyph description or not.
*
* @return whether the glyph color is specified in the glyph description or not
*/
public boolean isColor() {
return isColor;
}
/**
* Writes the width and optionally the bounding box parameters for a glyph
*
* @param wx the advance this character will have
* @param llx the X lower left corner of the glyph bounding box. If the isColor option is
* true the value is ignored
* @param lly the Y lower left corner of the glyph bounding box. If the isColor option is
* true the value is ignored
* @param urx the X upper right corner of the glyph bounding box. If the isColor option is
* true the value is ignored
* @param ury the Y upper right corner of the glyph bounding box. If the isColor option is
* true the value is ignored
* @param isColor defines whether the glyph color is specified in the glyph description in the font.
* The consequence of value true is that the bounding box parameters are ignored.
*/
private void writeMetrics(float wx, float llx, float lly, float urx, float ury, boolean isColor) {
this.isColor = isColor;
this.wx = wx;
this.llx = llx;
this.lly = lly;
this.urx = urx;
this.ury = ury;
if (isColor) {
contentStream.getOutputStream()
.writeFloat(wx)
.writeSpace()
.writeFloat(0)//wy
.writeSpace()
.writeBytes(d0);
} else {
contentStream.getOutputStream()
.writeFloat(wx)
.writeSpace()
.writeFloat(0)//wy
.writeSpace()
.writeFloat(llx)
.writeSpace()
.writeFloat(lly)
.writeSpace()
.writeFloat(urx)
.writeSpace()
.writeFloat(ury)
.writeSpace()
.writeBytes(d1);
}
}
/**
* Creates Image XObject from image and adds it to canvas. Performs additional checks to make
* sure that we only add mask images to not colorized type 3 fonts.
*
* @param image the {@code PdfImageXObject} object
* @param a an element of the transformation matrix
* @param b an element of the transformation matrix
* @param c an element of the transformation matrix
* @param d an element of the transformation matrix
* @param e an element of the transformation matrix
* @param f an element of the transformation matrix
* @param inlineImage true if to add image as in-line.
* @return created Image XObject or null in case of in-line image (asInline = true).
*/
@Override
public PdfXObject addImage(ImageData image, float a, float b, float c, float d, float e, float f, boolean inlineImage) {
if (!isColor && (!image.isMask() || !(image.getBpc() == 1 || image.getBpc() > 0xff))) {
throw new PdfException("Not colorized type3 fonts accept only mask images.");
}
return super.addImage(image, a, b, c, d, e, f, inlineImage);
}
private void fillBBFromBytes(byte[] bytes) {
String str = new String(bytes);
int d0Pos = str.indexOf(D_0_STR);
int d1Pos = str.indexOf(D_1_STR);
if (d0Pos != -1) {
isColor = true;
String[] bbArray = str.substring(0, d0Pos - 1).split(" ");
if (bbArray.length == 2)
this.wx = Float.parseFloat(bbArray[0]);
} else if (d1Pos != -1) {
isColor = false;
String[] bbArray = str.substring(0, d1Pos - 1).split(" ");
if (bbArray.length == 6) {
this.wx = Float.parseFloat(bbArray[0]);
this.llx = Float.parseFloat(bbArray[2]);
this.lly = Float.parseFloat(bbArray[3]);
this.urx = Float.parseFloat(bbArray[4]);
this.ury = Float.parseFloat(bbArray[5]);
}
}
}
}
