Features
@@ -549,7 +550,54 @@
-
+
+
+ Export PowerPoint slides into java.awt.Graphics2D
+
+ HSLF provides a way to export slides into images. You can capture slides into java.awt.Graphics2D object (or any other)
+ and serialize it into a PNG or JPEG format. Please note, although HSLF attempts to render slides as close to PowerPoint as possible,
+ the output might look differently from PowerPoint due to the following reasons:
+
+
+
Java2D renders fonts differently vs PowerPoint. There are always some differences in the way the font glyphs are painted
+
HSLF uses java.awt.font.LineBreakMeasurer to break text into lines. PowerPoint may do it in a different way.
+
If a font from the presentation is not avaiable, then the JDK default font will be used.
+
+
+ Current Limitations:
+
+
+
Some types of shapes are not yet supported (WordArt, complex auto-shapes)
+
Only Bitmap images (PNG, JPEG, DIB) can be rendered in Java
+
+
+ FileInputStream is = new FileInputStream("slideshow.ppt");
+ SlideShow ppt = new SlideShow(is);
+ is.close();
+
+ Dimension pgsize = ppt.getPageSize();
+
+ Slide[] slide = ppt.getSlides();
+ for (int i = 0; i < slide.length; i++) {
+
+ BufferedImage img = new BufferedImage(pgsize.width, pgsize.height, BufferedImage.TYPE_INT_RGB);
+ Graphics2D graphics = img.createGraphics();
+ //clear the drawing area
+ graphics.setPaint(Color.white);
+ graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
+
+ //render
+ slide[i].draw(graphics);
+
+ //save the output
+ FileOutputStream out = new FileOutputStream("slide-" + (i+1) + ".png");
+ javax.imageio.ImageIO.write(img, "png", out);
+ out.close();
+ }
+
+
+
+
diff --git a/src/scratchpad/examples/src/org/apache/poi/hslf/examples/PPT2PNG.java b/src/scratchpad/examples/src/org/apache/poi/hslf/examples/PPT2PNG.java
new file mode 100755
index 000000000..aa8145051
--- /dev/null
+++ b/src/scratchpad/examples/src/org/apache/poi/hslf/examples/PPT2PNG.java
@@ -0,0 +1,103 @@
+
+/* ====================================================================
+ 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.hslf.examples;
+
+import org.apache.poi.hslf.usermodel.*;
+import org.apache.poi.hslf.model.*;
+import org.apache.poi.hslf.record.TextHeaderAtom;
+
+import javax.imageio.ImageIO;
+import java.io.IOException;
+import java.io.FileOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Rectangle2D;
+
+/**
+ * Demonstrates how you can use HSLF to convert each slide into a PNG image
+ *
+ * @author Yegor Kozlov
+ */
+public class PPT2PNG {
+
+ 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;
+ }
+
+ FileInputStream is = new FileInputStream(file);
+ SlideShow ppt = new SlideShow(is);
+ is.close();
+
+ Dimension pgsize = ppt.getPageSize();
+ int width = (int)(pgsize.width*scale);
+ int height = (int)(pgsize.height*scale);
+
+ Slide[] 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 "+slide[i].getSlideNumber() + (title == null ? "" : ": " + title));
+
+ BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+ Graphics2D graphics = img.createGraphics();
+ graphics.setPaint(Color.white);
+ graphics.fill(new Rectangle2D.Float(0, 0, width, height));
+
+ graphics.scale((double)width/pgsize.width, (double)height/pgsize.height);
+
+ slide[i].draw(graphics);
+
+ String fname = file.replaceAll("\\.ppt", "-" + (i+1) + ".png");
+ FileOutputStream out = new FileOutputStream(fname);
+ ImageIO.write(img, "png", out);
+ out.close();
+ }
+ }
+
+ private static void usage(){
+ System.out.println("Usage: PPT2PNG [-scale