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The Apache Commons Codec package contains simple encoder and decoders for
various formats such as Base64 and Hexadecimal. In addition to these
widely used encoders and decoders, the codec package also maintains a
collection of phonetic encoding utilities.
The newest version!
/*
* ====================================================================
* 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.
* ====================================================================
*/
package org.apache.poi.xslf.util;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.lang.ref.WeakReference;
import java.util.List;
import java.util.Locale;
import java.util.Set;
import java.util.TreeSet;
import javax.imageio.ImageIO;
import org.apache.poi.sl.draw.Drawable;
import org.apache.poi.sl.usermodel.Slide;
import org.apache.poi.sl.usermodel.SlideShow;
import org.apache.poi.sl.usermodel.SlideShowFactory;
/**
* An utility to convert slides of a .pptx slide show to a PNG image
*
* @author Yegor Kozlov
*/
public class PPTX2PNG {
static void usage(String error){
String msg =
"Usage: PPTX2PNG [options] \n" +
(error == null ? "" : ("Error: "+error+"\n")) +
"Options:\n" +
" -scale scale factor\n" +
" -slide 1-based index of a slide to render\n" +
" -format png,gif,jpg (,null for testing)" +
" -outdir output directory, defaults to origin of the ppt/pptx file" +
" -quiet do not write to console (for normal processing)";
System.out.println(msg);
// no System.exit here, as we also run in junit tests!
}
public static void main(String[] args) throws Exception {
if (args.length == 0) {
usage(null);
return;
}
String slidenumStr = "-1";
float scale = 1;
File file = null;
String format = "png";
File outdir = null;
boolean quiet = false;
for (int i = 0; i < args.length; i++) {
if (args[i].startsWith("-")) {
if ("-scale".equals(args[i])) {
scale = Float.parseFloat(args[++i]); // lgtm[java/index-out-of-bounds]
} else if ("-slide".equals(args[i])) {
slidenumStr = args[++i]; // lgtm[java/index-out-of-bounds]
} else if ("-format".equals(args[i])) {
format = args[++i]; // lgtm[java/index-out-of-bounds]
} else if ("-outdir".equals(args[i])) {
outdir = new File(args[++i]); // lgtm[java/index-out-of-bounds]
} else if ("-quiet".equals(args[i])) {
quiet = true;
}
} else {
file = new File(args[i]);
}
}
if (file == null || !file.exists()) {
usage("File not specified or it doesn't exist");
return;
}
if (format == null || !format.matches("^(png|gif|jpg|null)$")) {
usage("Invalid format given");
return;
}
if (outdir == null) {
outdir = file.getParentFile();
}
if (!"null".equals(format) && (outdir == null || !outdir.exists() || !outdir.isDirectory())) {
usage("Output directory doesn't exist");
return;
}
if (scale < 0) {
usage("Invalid scale given");
return;
}
if (!quiet) {
System.out.println("Processing " + file);
}
try (SlideShow ss = SlideShowFactory.create(file, null, true)) {
List> slides = ss.getSlides();
Set slidenum = slideIndexes(slides.size(), slidenumStr);
if (slidenum.isEmpty()) {
usage("slidenum must be either -1 (for all) or within range: [1.." + slides.size() + "] for " + file);
return;
}
Dimension pgsize = ss.getPageSize();
int width = (int) (pgsize.width * scale);
int height = (int) (pgsize.height * scale);
for (Integer slideNo : slidenum) {
Slide slide = slides.get(slideNo);
String title = slide.getTitle();
if (!quiet) {
System.out.println("Rendering slide " + slideNo + (title == null ? "" : ": " + title));
}
BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics = img.createGraphics();
// default rendering options
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
graphics.setRenderingHint(Drawable.BUFFERED_IMAGE, new WeakReference<>(img));
graphics.scale(scale, scale);
// draw stuff
slide.draw(graphics);
// save the result
if (!"null".equals(format)) {
String outname = file.getName().replaceFirst(".pptx?", "");
outname = String.format(Locale.ROOT, "%1$s-%2$04d.%3$s", outname, slideNo, format);
File outfile = new File(outdir, outname);
ImageIO.write(img, format, outfile);
}
graphics.dispose();
img.flush();
}
}
if (!quiet) {
System.out.println("Done");
}
}
private static Set slideIndexes(final int slideCount, String range) {
Set slideIdx = new TreeSet<>();
if ("-1".equals(range)) {
for (int i=0; i