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- /*
- * ====================================================================
- * 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.List;
- import java.util.Locale;
- import java.util.Set;
- import java.util.TreeSet;
-
- import javax.imageio.ImageIO;
-
- import org.apache.poi.sl.draw.DrawFactory;
- 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] <ppt or pptx file>\n" +
- (error == null ? "" : ("Error: "+error+"\n")) +
- "Options:\n" +
- " -scale <float> scale factor\n" +
- " -slide <integer> 1-based index of a slide to render\n" +
- " -format <type> png,gif,jpg (,null for testing)" +
- " -outdir <dir> 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)$")) {
- usage("Invalid format given");
- return;
- }
-
- if (outdir == null) {
- outdir = file.getParentFile();
- }
-
- if (!"null".equals(format) && (outdir == null || !outdir.exists() || !outdir.isDirectory())) {
- usage("Output directory doesn't exist");
- return;
- }
-
- if (scale < 0) {
- usage("Invalid scale given");
- return;
- }
-
- if (!quiet) {
- System.out.println("Processing " + file);
- }
- try (SlideShow<?, ?> ss = SlideShowFactory.create(file, null, true)) {
- List<? extends Slide<?, ?>> slides = ss.getSlides();
-
- Set<Integer> slidenum = slideIndexes(slides.size(), slidenumStr);
-
- if (slidenum.isEmpty()) {
- usage("slidenum must be either -1 (for all) or within range: [1.." + slides.size() + "] for " + file);
- return;
- }
-
- Dimension pgsize = ss.getPageSize();
- int width = (int) (pgsize.width * scale);
- int height = (int) (pgsize.height * scale);
-
- for (Integer slideNo : slidenum) {
- Slide<?, ?> slide = slides.get(slideNo);
- String title = slide.getTitle();
- if (!quiet) {
- System.out.println("Rendering slide " + slideNo + (title == null ? "" : ": " + title));
- }
-
- BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
- Graphics2D graphics = img.createGraphics();
-
- // default rendering options
- graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
- graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
- graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
- graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
-
- graphics.scale(scale, scale);
-
- // draw stuff
- slide.draw(graphics);
-
- // save the result
- if (!"null".equals(format)) {
- String outname = file.getName().replaceFirst(".pptx?", "");
- outname = String.format(Locale.ROOT, "%1$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<Integer> slideIndexes(final int slideCount, String range) {
- Set<Integer> slideIdx = new TreeSet<>();
- if ("-1".equals(range)) {
- for (int i=0; i<slideCount; i++) {
- slideIdx.add(i);
- }
- } else {
- for (String subrange : range.split(",")) {
- String idx[] = subrange.split("-");
- switch (idx.length) {
- default:
- case 0: break;
- case 1: {
- int subidx = Integer.parseInt(idx[0]);
- if (subrange.contains("-")) {
- int startIdx = subrange.startsWith("-") ? 0 : subidx;
- int endIdx = subrange.endsWith("-") ? slideCount : Math.min(subidx,slideCount);
- for (int i=Math.max(startIdx,1); i<endIdx; i++) {
- slideIdx.add(i-1);
- }
- } else {
- slideIdx.add(Math.max(subidx,1)-1);
- }
- break;
- }
- case 2: {
- int startIdx = Math.min(Integer.parseInt(idx[0]), slideCount);
- int endIdx = Math.min(Integer.parseInt(idx[1]), slideCount);
- for (int i=Math.max(startIdx,1); i<endIdx; i++) {
- slideIdx.add(i-1);
- }
- break;
- }
- }
- }
- }
- return slideIdx;
- }
- }
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