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/*
* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Polygon;
import java.awt.geom.AffineTransform;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.io.ByteArrayOutputStream;
import java.nio.charset.StandardCharsets;
import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.SimpleDoc;
import javax.print.StreamPrintService;
import javax.print.StreamPrintServiceFactory;
import javax.print.event.PrintJobAdapter;
import javax.print.event.PrintJobEvent;
/*
* @test
* @bug 8349932
* @summary Verifies that generated PostScript omits unnecessary graphics state commands.
*/
public class PostScriptLeanTest {
public static void main(String[] args) throws Exception {
DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
String mime = "application/postscript";
StreamPrintServiceFactory[] factories = StreamPrintServiceFactory.lookupStreamPrintServiceFactories(flavor, mime);
if (factories.length == 0) {
throw new RuntimeException("Unable to find PostScript print service factory");
}
StreamPrintServiceFactory factory = factories[0];
ByteArrayOutputStream output = new ByteArrayOutputStream();
StreamPrintService service = factory.getPrintService(output);
DocPrintJob job = service.createPrintJob();
PrintJobMonitor monitor = new PrintJobMonitor();
job.addPrintJobListener(monitor);
Printable printable = new TestPrintable();
Doc doc = new SimpleDoc(printable, flavor, null);
job.print(doc, null);
monitor.waitForJobToFinish();
byte[] separator = System.lineSeparator().getBytes(StandardCharsets.UTF_8);
byte prefix = separator[separator.length - 1];
byte postfix = separator[0];
int paths = 0;
byte[] ps = output.toByteArray();
for (int i = 1; i + 1 < ps.length; i++) {
if (ps[i - 1] == prefix && ps[i] == 'N' && ps[i + 1] == postfix) {
paths++; // found a "newpath" command (aliased to "N")
}
}
if (paths != 1) {
throw new RuntimeException("Expected 1 path, but found " + paths + " paths");
}
}
private static final class TestPrintable implements Printable {
@Override
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
if (pageIndex > 0) {
return NO_SUCH_PAGE;
}
Font font1 = new Font("SansSerif", Font.PLAIN, 20);
Font font2 = font1.deriveFont(AffineTransform.getQuadrantRotateInstance(1));
graphics.setFont(font1);
graphics.drawString("XX", 300, 300); // not ignored, adds a path
graphics.setFont(font2);
graphics.drawString("\r", 300, 350); // ignored, nothing to draw, no path added
graphics.drawString("\n", 300, 400); // ignored, nothing to draw, no path added
graphics.drawString("\t", 300, 450); // ignored, nothing to draw, no path added
graphics.drawPolygon(new Polygon()); // empty polygon, nothing to draw, no path added
return PAGE_EXISTS;
}
}
private static class PrintJobMonitor extends PrintJobAdapter {
private boolean finished;
@Override
public void printJobCanceled(PrintJobEvent pje) {
finished();
}
@Override
public void printJobCompleted(PrintJobEvent pje) {
finished();
}
@Override
public void printJobFailed(PrintJobEvent pje) {
finished();
}
@Override
public void printJobNoMoreEvents(PrintJobEvent pje) {
finished();
}
private synchronized void finished() {
finished = true;
notify();
}
public synchronized void waitForJobToFinish() {
try {
while (!finished) {
wait();
}
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
}
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