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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 org.apache.poi.openxml4j.opc.OPCPackage;
- import org.apache.poi.xslf.usermodel.XMLSlideShow;
- import org.apache.poi.xslf.usermodel.XSLFSlide;
-
- import javax.imageio.ImageIO;
- import java.awt.Color;
- import java.awt.Dimension;
- import java.awt.Graphics2D;
- import java.awt.RenderingHints;
- import java.awt.image.BufferedImage;
- import java.io.FileOutputStream;
-
- /**
- * An utulity to convert slides of a .pptx slide show to a PNG image
- *
- * @author Yegor Kozlov
- */
- public class PPTX2PNG {
-
- static void usage(){
- System.out.println("Usage: PPTX2PNG [options] <pptx file>");
- System.out.println("Options:");
- System.out.println(" -scale <float> scale factor");
- System.out.println(" -slide <integer> 1-based index of a slide to render");
- }
-
- public static void main(String[] args) throws Exception {
- if (args.length == 0) {
- usage();
- return;
- }
-
- int slidenum = -1;
- float scale = 1;
- String file = null;
-
- 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 {
- file = args[i];
- }
- }
-
- if(file == null){
- usage();
- return;
- }
-
- System.out.println("Processing " + file);
- XMLSlideShow ppt = new XMLSlideShow(OPCPackage.open(file));
-
- Dimension pgsize = ppt.getPageSize();
- int width = (int) (pgsize.width * scale);
- int height = (int) (pgsize.height * scale);
-
- XSLFSlide[] slide = ppt.getSlides();
- for (int i = 0; i < slide.length; i++) {
- if (slidenum != -1 && slidenum != (i + 1)) continue;
-
- String title = slide[i].getTitle();
- System.out.println("Rendering slide " + (i + 1) + (title == null ? "" : ": " + title));
-
- BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
- 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.setColor(Color.white);
- graphics.clearRect(0, 0, width, height);
-
- graphics.scale(scale, scale);
-
- // draw stuff
- slide[i].draw(graphics);
-
- // save the result
- int sep = file.lastIndexOf(".");
- String fname = file.substring(0, sep == -1 ? file.length() : sep) + "-" + (i + 1) +".png";
- FileOutputStream out = new FileOutputStream(fname);
- ImageIO.write(img, "png", out);
- out.close();
- }
- System.out.println("Done");
- }
- }
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