org.apache.poi.xslf.util.PPTX2PNG Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of poi-ooxml Show documentation
Show all versions of poi-ooxml Show documentation
Apache POI - Java API To Access Microsoft Format Files
/*
* ====================================================================
* 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.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
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;
import org.apache.poi.util.JvmBugs;
/**
* An utulity 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" +
" -quite 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;
}
int slidenum = -1;
float scale = 1;
File file = null;
String format = "png";
File outdir = null;
boolean quite = false;
for (int i = 0; i < args.length; i++) {
if (args[i].startsWith("-")) {
if ("-scale".equals(args[i])) {
scale = Float.parseFloat(args[++i]);
} else if ("-slide".equals(args[i])) {
slidenum = Integer.parseInt(args[++i]);
} else if ("-format".equals(args[i])) {
format = args[++i];
} else if ("-outdir".equals(args[i])) {
outdir = new File(args[++i]);
} else if ("-quite".equals(args[i])) {
quite = true;
}
} else {
file = new File(args[i]);
}
}
if (file == null || !file.exists()) {
usage("File not specified or it doesn't exist");
return;
}
if (outdir == null) {
outdir = file.getParentFile();
}
if (outdir == null || !outdir.exists() || !outdir.isDirectory()) {
usage("Output directory doesn't exist");
return;
}
if (scale < 0) {
usage("Invalid scale given");
return;
}
if (format == null || !format.matches("^(png|gif|jpg|null)$")) {
usage("Invalid format given");
return;
}
if (!quite) {
System.out.println("Processing " + file);
}
SlideShow ss = SlideShowFactory.create(file, null, true);
List> slides = ss.getSlides();
if (slidenum < -1 || slidenum == 0 || slidenum > slides.size()) {
usage("slidenum must be either -1 (for all) or within range: [1.."+slides.size()+"] for "+file);
return;
}
Dimension pgsize = ss.getPageSize();
int width = (int) (pgsize.width * scale);
int height = (int) (pgsize.height * scale);
int slideNo=1;
for(Slide slide : slides) {
if (slidenum == -1 || slideNo == slidenum) {
String title = slide.getTitle();
if (!quite) {
System.out.println("Rendering slide " + slideNo + (title == null ? "" : ": " + title));
}
BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics = img.createGraphics();
fixFonts(graphics);
// default rendering options
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
graphics.scale(scale, scale);
// draw stuff
slide.draw(graphics);
// save the result
if (!"null".equals(format)) {
String outname = file.getName().replaceFirst(".pptx?", "");
outname = String.format(Locale.ROOT, "%1$s-%2$04d.%3$s", outname, slideNo, format);
File outfile = new File(outdir, outname);
ImageIO.write(img, format, outfile);
}
}
slideNo++;
}
if (!quite) {
System.out.println("Done");
}
}
@SuppressWarnings("unchecked")
private static void fixFonts(Graphics2D graphics) {
if (!JvmBugs.hasLineBreakMeasurerBug()) return;
Map fontMap = (Map)graphics.getRenderingHint(Drawable.FONT_MAP);
if (fontMap == null) fontMap = new HashMap();
fontMap.put("Calibri", "Lucida Sans");
fontMap.put("Cambria", "Lucida Bright");
graphics.setRenderingHint(Drawable.FONT_MAP, fontMap);
}
}